NZ618743B2 - Methods of treatment for retinal diseases - Google Patents

Abstract

Disclosed the use of an effective amount of mesencephalic astrocytederived neurotrophic factor (MANF) in the preparation of a medicament for treating a retinal disorder selected from the group consisting of retinitis pigmentosa, age-related macular degeneration, and glaucoma. Further disclosed is the use of an effective amount of mesencephalic astrocytederived neurotrophic factor (MANF) in the manufacture of a medicament for promoting neuroprotection in a neuronal cell selected from the group consisting of a retinal ganglion cell and a photoreceptor cell. e use of an effective amount of mesencephalic astrocytederived neurotrophic factor (MANF) in the manufacture of a medicament for promoting neuroprotection in a neuronal cell selected from the group consisting of a retinal ganglion cell and a photoreceptor cell.

Description

Description METHODS OF TREATMiNl FOR RfilTNAL DISEASES CROSS—Rilb‘ilRiiNCil lO RiZT.Al*.D ABET. CAl OI\ The present application claims the benefit of U.S.

Provisional Application Ser. No. ,l82, filed June 9, 201l, which is incorporated herein by reference in its ty.

STAlEMENl REGARDlNG hEDERALLY—SPONSORED RESEARCH AND PMENT This invention was made with U.S. government support under grant njmbers RO—l EY—018586, RO—l EY—Ol5289, ?30 EY—l480; awarded by the National Eye Institute, Rational utes 0: Health (NEI/NIH) and grant number W81XWH—09—l—0674 awarded by tre United States Department of Defense. The U.S. government may have certain rights in the irventior.

BACKGROUND OF TEE INVENTION Field of the Invention This invention relates generally to the field of l degenerative disorders. More particularly, it concerns methods of ng retinal degenerative disorders using neurotrophic factors and compositions and kits comprising neurotrophic factors.

Description of the Related Art Mesencephalic astrocyte—derived rophic factor (MANF) and conserved dopamine neurotrophic factor (CDNF) are two known members of a novel ionarily conserved protein family with neurotrophic capabilities (Petrova et al., 2003; Lindholm et al., 2007). The first member of the ami‘y, MANF, was identified from the conditional medium of a rat type—1 yte cell line, namely, the ventral mesencephalic cell line 1 (VMCLl), to be a factor that promotes the survival 0: cultured embryonic dopaminergic neurons (Petrova et al., 2003). MANF also significantly reduces infarction in the ischemic cortex in a rat model of stroke (Airavaara et al., 2009) and promotes the survival or cultured heart muscle cells (Tadimalla et al., 2008). CDNF, on the Other hand, was :irst identitied in silico and then biochemically characterized (Lindholm. et al., 2007). It was expressed in murine and human tissues, including the brain. A single injection of CDNF rescues amphetamine—induced. loss of dopaminergic neurons in the ntia nigra (Lindholm et al., 2007). Structural analysis showed that both MANF and CDNF have an N—terminal saposin—like lipid—binding domain and 21 inal domain that may be responsible for the endoplasmic reticulum (ER) stress response, and neither protein resembles any known growth factor (Parkash et al., 2009). The receptors and signaling pathways of CDNF and MANF are unknown. While these two proteins have been considered to be potential treatments for Parkinson's disease, the inventor herein has considered them to be ial treatments for other neurodegenerative disorders, including retinal degenerative disorders, such as inherited retina; disorders, age—related macular degeneration, and glaucoma.

Summary of the Invention In light of their neurotrophic capabilities and treatment potential in neJrodegenerative disorders, the present invention discloses the neurotrophic Lactors, MANF and CDNF, being used to rescue photoreceptors and l ganglion cells in retinal degenerative ers in patients, including ted retina; disorders, age—related macular degeneration, and glaucoma.

Specifically, the present invention provides a Hethod of treating a l disorder comprising administering an e 'ecLive amount of a neurotrophic factor to a t having the retinal disorder. The subject in need of treatment may be an animal, which may e a inammal (e.g., a human). The retinal disorders amenable to treatment or suppression by the methods of the invention comprise neurodegenerative disorders, such as age— d macular ration, ma, inherited retinal ers, sporadic retinal disorders, other degenerative retinal disorders, or retinal injuries.

The neurotrophic factors that may be administered in the embodiments of the present invention include MANF and CDNF, individually or in combination. The rophic factor may be a recombinant or isolated factor, and in ularly useful embodiments, the neurotrophic factor is a human rophic factor.

In particular embodiments, the neurotrophic factor is stered in a pharmaceutically acceptable vehicle. In some embodiments, the neurotrophic factor is injected into an eye of a t in need thereof, which may also be administered using a sustained-releasing vehicle.

The present invention also provides a method for promoting neuroprotection in a neuronal cell sing contacting the neuronal cell with a neurotrophic factor, which may include the neurotrophic factors MANF and CDNF, either individually or in combination. The contacting of neuronal cells can take place in vitro or in vivo.

The cell types amenable to treatment by the methods of the invention comprise ganglion cells or photoreceptor cells.

The present invention also provides a pharmaceutical composition comprising a rophic factor, which may include MANF and CDNF, individually or in combination. The present invention is also directed to kits of parts comprising neurotrophic factors, reagents, and instructions for use thereof.

Furthermore, the present invention may utilize neurotrophic factors having the sequences of SEQ ID NOS: 1, 2, 3, or 4.

The methods, compositions and kits herein bed can be used in connection with pharmaceutical, medical, and veterinary applications, as well as fundamental scientific research and methodologies, as would be identifiable by a d person upon g of the present disclosure. These and other objects, features and advantages of the present invention will become clearer when the drawings as well as the detailed description are taken into consideration.

The present invention as d herein is described in the following items 1 to 16: 1. Use of an effective amount of mesencephalic astrocyte- 1_1 (GHMatters) P95690.NZ PETERB derived neurotrophic factor (MANF) consisting of a fragment of SEQ ID NO:3 that is from 85% to 100% the length of SEQ ID NO:3 in the preparation of a medicament for ng a retinal disorder selected from the group consisting of retinitis pigmentosa, age-related macular ration, and ma. 2. The use of item 1, wherein said l disorder is retinitis pigmentosa. 3. The use of item 1, wherein said medicament r comprises a pharmaceutically acceptable carrier. 4. The use of item 3, wherein the pharmaceutically acceptable carrier is a saline solution.

. The use of item 1, wherein said medicament is for administration to an eye of said t. 6. The use of item 5, wherein said administration is by injection. 7. The use of item 6, wherein said injection is an intravitreal injection. 8. The use of item 1, wherein said medicament is for administration in an area adjacent to the eye. 9. The use of item 1, n said retinal disorder is agerelated macular degeneration.

. The use of item 1, wherein said retinal disorder is glaucoma. 11. Use of an effective amount of MANF consisting of a fragment of SEQ ID NO:3 that is from 85% to 100% the length of SEQ ID NO:3 in the preparation of a medicament for promoting neuroprotection in a neuronal cell selected from the group consisting of a retinal ganglion cell and a eceptor cell. 12. The use of item 11, wherein said contacting occurs in vivo. 13. The use of item 11, wherein said contacting occurs in vitro. 14. The use of item 11, wherein said MANF is a recombinant neurotrophic factor.

. The use of item 11, wherein said MANF is a human neurotrophic factor. 16. The use of item 15, wherein said MANF is a recombinant human neurotrophic factor. 7146111_1 (GHMatters) P95690.NZ PETERB These and other s, features and advantages of the present invention will become cl arcr wh n the drawings as well as the detailed description are taken into consideration.

Brief Description of the Drawings For a fuller understanding 0: the nature of the present invention, reference should be had to the following detailed description taken in connection with the accompanying s in which: Figure L shows a photograph of gel electrophoresis of purified recombinant human MANF n, at lug and Bug amounts, compared to a standard molecular weight (MW) ladder g the size 0: purified MANF protein as approximately 20 kilodaltons (K3) .

Figure 2 shows a photograpq of gel e‘ectrophoresis of ed recombinant human CDNF prOtein, at a 5ug amount, compared to a rd molecular weight (MW) ladder showing the size of ed CDNF protein as approximately 18 kilodaltons (K3).

Figures 3A—3C shOW' photographs of sections of the outer niclear layers of the retina of control— and MANF—treated S334ter3 rats under light microscopy, as well as quantitative analysis of tqe thickness of the outer nuclear layer in each. Figure 3A shows tie control, BBS (Bhosphate—Buffered Saline) treated retina.

Figure 3B is representative 0: a MANF—treated retina. Scale bar, 25pm. Figure 3C is a graphical representation of the quantitative analysis of the thickness of tie outer nuclear layer of the retina in PBS treated and MANF d retinas.

Figures 4A—4C show light microscopy photographs of sections of the outer nuclear layers of the retina in control— and CJNF— 3O treated 8334ter3 rats, as well as quantitative analysis of the thickness of the outer nuclear layer in each. Figure 4A is entative of control PBS (Phosphate—Bu Zered Saline) treated retinas. Figure 43 is entative (x5 CDNF—treated retinas.

Scale bar, 25pm. Figure 4C is a graphical representation of the quantitative analysis of the thickness of the outer nuclear layer of the retina in PBS—treated and CDNF—treated retinas.

Figures 5A—5C show fluorescent microscopy photographs 0: cone outer segment (COS) of whole mounted retinas st ained with ALexa Fluor 488 conjugated PNA (peanut agglutinin) in control— and MANF— treated S334ter3 rats (Figures 5A and 5B), as well as tative analysis of each (Figure 5C). Figure 5A is representative of a control, PBS—treated retina. Figure 53 is representative 0; a MANF—treated retina. Scale bar, SOun. Figure 5C is a graphical representation (x: the quantitative aralysis 0:: the number of labeled. cells of the retina in PBS—treated. and. MANF—treated retinas.

Figures 6A—6C show fluorescent microscopy photographs of COS 0: whole d retinas stained with Alexa Fluor 488 conjugated PVA in control— and CDNF—treated SB34ter3 rats (Figures 6A and 63), as well as quantitative analysis of each (Figure 6C). Figure 6A is entative of a control PBS—treated retina. Figure 6B is representative of a reated retina. Figure 6C is a graphical representation. of tre quantitative is 0:f the number of labeled. cells of the retina in PBS—treated. and. CDNF—treated retinas. s 7A—7C show representative micrographs of Fluoro—Gold retralabeled ganglion ce‘ls 0: whole mounted retinas of control rats (Figure 7A), rats after optical nerve crush in addition to PBS treatment as a control (Figure 7B), and rats after optic nerve CIJSh in addition to MANF—treatment (Figure 7C ). Figure 7A is representative of control retinal ganglion cells experiencing no optic nerve crust. Figure 73 is entative of retinal ganglion cells two weeks after optic nerve crush and PBS treatment. Figure 7C is entative 0: retinal on cells two weeks after 3O optic nerve crush and MANF treatment.

Figire 8 shows a photograph of a Western blot probed for .ANF and B—ACtin (loading control). MANF expression levels in extracts from retinas o: wild—type Sprague Dawley rats at PD 1, PD 5, PD 8, PD 10, P3 12, P3 16, P3 25, P3 30, P3 40 and PD 60 are shown.

Figire 9 shows a fluorescent Inicroscopy photograph of a cryosection of rat retina probed witr anti—MANF antibodies. Scale bar, 50Mm. Layers d on the n include the retinal pigment epithelium (RPE), the outer photoreceptor segment (OS), the inner photoreceptor segment (IS), the outer nuclear layer (ONL), the inner nuclear layer (INL), the inner plexiform layer (IPL), and the ganglion cell layer (GCn). The immunoactivity of MANF is shown in the RP;*J cells, MUller cell fibers and cell bodies, as well as in the GCL.

Figure l0 shows the nucleic acid sequence of SfiQ -3 NO: 1.

Figure " shows the nucleic acid ce of S?Q "3 NO: 2.

Figure l2 shows the amino acid ce of SMQ 3 V0: 3.

Figure l3 shows the amino acid sequence of SnQ 3 V0: 4.

Like reference numerals refer to like parts throughout the several views 0: the drawings.

Detailed Description of the Preferred Embodiment .—fhe present invention is directed to methods of treatment, compositions and kits .C lor treating retinal disorders.

Several aspects 0: the invention are described below, with reference to examples for illustrative purposes only. It should be understood that numerous specific details, relationships, and methods set forth to provide lull1: are a tanding of the invention. One laving ordinary skill in the relevant art, however, will readily recognize that the invention can be practiced without one or more of the specific details or practiced with other s, ols, reagents, cell lines and animals. The present invention is not limited by the illustrated ng 0: acts or events, as some acts may occur in di 'erent orders and/or concurrently with other acts or events. Many of the ques and procedures described, or nced herein, are well understood and commonly employed using conventional methodology by those skilled in the art.

Unless otherwise defined, all terms of art, notations and other scientific terms or terminology used herein are intended to have the meanings commonly understood by those 0: skill in the art to which this invention pertains. In some cases, terms with commonly understood meanings are defined herein for c'arity and/or for ready reference, and the inclusion of such definitions herein should not necessarily be ued to represent a substantial di"erence over what is generally understood in the art. “t Wil' be further understood. that terms, such as those defined in commonly used dictionaries, should be reted as having a meaning that is consistent with their meaning in the context of the relevant art and/or as otherwis dcfin d h rcin.

The terminology used herein is for the purpose of describing particular embodiments only and is nOt intended to be limiting of the invention. As used herein, the irdefinite articles "a", "an" and "the" should be understood to include plural re:ference unless the context clearly indicates otherwise.

The phrase "and/or," as used , should be tood to mean "either or both" o: the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases.

As used herein, "or" should be understood to have the same meaning as "and/or" as defined above. For e, when ting a listing of items, "and/or" or "or" shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, o: a number of items, and, optionally, additional unliSted items. Only terms y indicated to the contrary, such as "only one of" or "exactly one of," or, when used in the claims, "consisting of," will refer to the inclusion of exactly one element of a number or list of elements. In general, the term "or" as used. herein shall only be interpreted. as indicating exclusive alternatives (i.e., "one or the other but not bOth") when preceded by terms of exclusivity, such as "either," "one of," "only one of," or "exactly one of." As used herein, the terms "ircluding", des", "having", "has", "with", or variants :, are ed to be inclusive similar to the term "comprising." All genes and gene products (including RNA and proteins), and their respective names, disclosed herein are intended to correspond to homologs from any species for which the compositions and methods sed herein are applicable. When a gene or gene product from a particular species is sed, it is tood that this disclosure is intended to be exemplary only and is not to be reted as a limitation unless the context in which it appears clearly indicates otherwise. For example, the genes and gene products disclosed herein, which in some embodiments relate to mammalian (including human) nucleic acid and/or amino acid sequences, are intended to encompass homologous and/or ogous and/or paralogous genes and gene products from other animals including, but not limited to, other mammals, fish, reptiles, amphibians, birds, and Other vertebrates.

In the context of the present invention, the terns "polypeptide" and in" are equivalent and mutually interchangeable. They refer to any amino acid chain, and include any post—translational modifications thereto (for example phosphorylation or glycosylafion).

As used herein, the term "subject" refers to any animal (e.g., mammals, birds, reptiles, amphibians, fish), including, but not limited to, humans, non—human primates, rodents, and the like, which is to be the recipient of a particular ,reaoment. Typically, the terms ct" and "patient" may be used interchangeably herein in reference to a subject. rmore, transgenic animals (e.g., transgenic rats and mice) are useful in the methods of the present invention.

As used herein, the term ”compound" refers to a ropqic factor, unless clearly ted otherwise. The rophic factor can. b rcprcs ntcd, described, and/or applied. for ,he purposes of the present invention in recombinant DNA, RNA or protein form. The neurotrophic factor can also be in an ed form, as isolated and ed from an animal, which could also be a subject. In some embodiments, the neurotrophic factor may be a polypeptide, polynucleotide, or fragment thereof. The term ”biologic” may also be used interchangeably with ll compound” herein to refer to a neurotrophic factor 0: the present invention.

As used rerein, the term "fragmeno" refers to a portion 0; a compound. For example, when referring to a protein, a fragment is a plurality of consecutive amino acids comprising less than the entire length of the polypeptide. For instance, a fragment of a compound can share up to 99%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, or 60% o_ its sequence with the parent compound.

As used , the term "administering" refers to providing a therapeutically teective amount of a chemical or biological compound or pharmaceutical composition to a subject, using itreal, intraocular, ocular, subretinal, intrathecal, intravenous, subcutaneous, transcutaneous, intracutaneous, intracranial, topical and the like administration. The chemical or biological compound 0: the present invention can be administered alone, but may be administered with other compounds, excipients, fillers, binders, carriers or oth r v hicl s s lcct d based upon the chosen route 0: administration and standard pharmaceutical practice. Administration may be by way of carriers or vehicles, such as injectable solutions, including sterile aqueous or non— aqueous solutions, or saline solutions; creams; s; capsules; tablets; granules; pellets; s; suspensions, emulsions, or microemulsions; patches; micelles; liposomes; vesicles; implants, inc‘uding microimplants; eye drops; other proteins and peptides; synthetic rs; microspheres; nanoparticles; and the like.

The chenical or biological compound or pharmaceutical composition ol the present invention may also be included, or packaged, with Other non—toxic compounds, suck as pharmaceutically acceptable carriers, excipients, binders and tillers inc'uding, but not limited to, glucose, lactose, gum acacia, n, ol, xanthan gum, locust bean gum, galactose, oligosaccharides and/or polysaccharides, starch paSte, magnesium trisilicate, talc, corn , starch fragments, keratin, colloidal , potato starch, urea, dextrans, dextrins, and the like. Specifically, the pqarmaceutically able carriers, excipients, s, and. :illers contemplated. for use in ‘:he practice 0: tqe present invention are those wrich render the compounds of the invention amenable lo itreal delivery, intraocular delivery, ocular delivery, subretinal delivery, intrathecal delivery, intravenous delivery, aneous delivery, transcutaneous delivery, intracutaneous delivery, intracranial delivery, topical delivery and the like. er, the packaging material may be biologically inert or lack bioactivity, such as plastic polymers, silicone, etc. and may be processed internally by the subject without ing the effectiveness of the neurOtrophic factor ed and/or delivered therewith.

It is also contemplated that the compounds of the present inventior can be administered by way 0: an tation vehicle, such as Encapsulated Cell Technology (ECT) or other similar or future—derived micro—implantation technologies. ECT is described in Tao, W. et al., 2006, Tao, W. and Wen, R., 2007 and Sieving et al., 2006, which are incorporated herein by reference. In some ments, the ECT vehicle may release the compounds of the present invention at the rate of about 250 ng to about 800 ng per 1x106 cells per day. The implanted vehicle may also be any other similar sustain d rcl aso v hiclo, or the like, that is later developed.

The term tive amount," as applied to the compound(s), biologics and ceutical compositions described herein, means the quantity necessary to r ndor th dcsir d tqcrap utic .

For example, an effective amount is a leve' effective to treat, cure, or alleviate the symptoms of a disorder for which the therapeitic compound, biologic or conposition is being adminiStered. Amounts effective for the particular therapeutic goal soaght will depend upon a variety of factors including the disorder being treated and its severity and/or stage of development/progression; the bioavailability, and ty of the specific compound, biologic or ceutical composition used; the route or metrod of administration and introduction site on the subject; the rate of clearance of the specific compound or biologic and otter cokinetic properties; the duration of treatment; inOCLlation regimen; drugs used. in combination or coincident with the specific compound, biologic or composition; the age, body weight, sex, diet, physiology and general health of the subject being treated; and like factors well known to one of skill in the relevant scientific art. Some variation in dosage will necessarily occur depending upon the ion of the subject being treated, and the physician or other individual administering treatment will, in any event, ine the appropriate dose :or an individual patient.

As used herein, ”disorder" refers to a disorder, disease or condition, or other departure from healthy or normal biological activity, and the terms can be used in:erchangeably. The terms would refer to any condition that s normal on. The condition may be caused by sporadic or heritable genetic abnormalities. The condition may also be caused by non—genetic alities. The condition may also be caused by injuries to a subject from environmental factors, such as, but not d to, cutting, crushing, burning, ng, stretching, shearing, injecting, or otherwise modifying a subject’s cell(s), tissue(s), organ(s), (s), or :he like.

As used herein, ”treatment” or "treating” refers to arresting or inhibiting, or attempting to arrest or inhibit, the development or progression of a disorder and/or g, or attempting to cause, the reduction, suppression, regression, or remission o; a disorder and/or a symptom thereof. As would be understood by those skilled in the art, various clinical and scientific methodologies and assays may be used to assess the development or progression of a disorder, and similarly, various clinical and scien,ific methodologies and assays may be used to assess the reduc:ion, regression, or ion of a disorder or its symptoms.

Additionally, treatment can be applied to a subject or to a cell culture.

In accordance with at least one embodiment of the present invention, a method for treating a retinal disorder in a subject in need thereof comprises administering an effective amount of a compound as described herein to the subject. in one embodiment, this nd is a neurotrophic factor.

The term “neurotrophic factor” refers to deoxyribonucleic acids (DNA), and ribonucleic acids (RNA) and proteins derived therefrom, in addition to fragments thereof, that are responsible for the growth and surviva' O" nerve cells during development and for the maintenance of adult nerve cells. In some embodiments of the present ion, the neurotrophic factor is Mesencephalic astrocyte—derived neurOtrophic fac,or (MANF). In additional embodiments, the neurOtrophic fac,or is ved ne neurotrophic factor (CDNF). Also, t he neurotrophic factor administered may be a combination of MANF and CDNF. As would be understood by those skilled in the art, MANF and CDNF may have homologs, orthologs and/or paralogs that would additionally be contemplated for use in the present invention.

In one embodiment of the present invention, the neurotrophic factor is a recombinant polypeptide. The recombinant polypeptide may be the recombinant MANF or CJNF protein. Tt is also contemplated in the present invention that recombinant MANF and/or CDNF ptide fragments can be used in the methods and kits described herein. "t is further contemplated that recombinant MANF add/or CDNF full length DNA, CDNA or mQNA (or fragments thereof) may be utilized in the methods and kits described herein. In some embodiments, the DNA, cDNA or mRNA (or fragments thereof) may be comprised in a plasmid, , or the like. For exaiple, polynucleotides, and fragments thereo;, iay be utilized by way of gene therapy techniques or encaps alated cel; technology (ECT).

Additionally, the present invention H ay e neurotrophic factors having the sequences of SfiQ D NOS: L, 2, 3, or 4 (or fragments, recombinant s, chimerics, or combinations thereof).

In the method of the present irvention, the neurotrophic factor is administered with a pharmaceutically acceptable r or vehicle. For instarce, the ceutically acceptable carrier or vehicle can be a saline solution or any Other e contemplated herein.

In particular, in one embodiment, the neurotropaic factor is administered by way O: injection. In some embodiments, the injection site is an eye of the subject and can be cular, itreal, subretinal and the like administration. In other embodiments, the neurotrophic factor is administered in an area adjacent to the eye, and may be h injection or other methods of delivery as described herein.

The neurotrophic factor may also be administered by way of implantation of a 'vehicle into an eye of the subject to be treated. The vehicle may be a microimplantation device, such as ulated Cell logy (ECT) or other similar or Suture— derived micro—implantation technologies.

The retinal disorder treated by the method of the present invention may be the result 0: an injury to a tissue or a cell of the central nervous system. The retinal disorder d can also be a neurodegenerative disorder (e.g., tis pigmentosa). The tissue is injured or aijlic,ed.,_ or cell that with a egenerative disorder can be a ganglion cell, such as a retinal on cell, or a photoreceptor cell. In some embodiments, the retinal disorder treated involves ganglion cell degeneration. Such ganglion cell degeneration may be induced by glaucoma.

The neurodegenerative disorders contemplated for the treatment as described nerein can be c or sporadic (i.e., happening as an ed, non—heritable event) in nature. As would be understood by those of skill in the art, neurodegenerative disorders also embrace ions other than retinal neurodegenerative disease, and the methods, compositions and kits of the present invention are contemplated to be applicable to other such disorders. Such disorders include Alzheimer’s disease, Huntington’s disease, Parkinson’s disease, amyotrophic lateral sclerosis, glaucoma, age—related hearing loss, progressive supranuclear palsy, mild cognitive impairment, dementia, spinocerebellar ataxias, and the like.

In at least one embodiment, the neurotrophic tactor is administered at the site of injury or affliction with the neurodegenerative disorder or in an area adjacent to the site of injury or a 'liction. The neurotrophic factor may also be Stered by way of a vehicle that releases the factor in a controlled (i.e., time and/or dose dependant) manner, for e, as in ECT, discussed previously herein.

In ance with another embodiment of the present invention, a method for promoting neuroprotection in a neuronal cell comprises contacting the neuronal cell with a neurotrophic factor, such as MANF, CDNF or combinations thereof. As used herein, the term llneuroprotection” refers to preventing, halting, inhibiting, or g nerve damage, neuron oration, and/or death of neurons. Neuroprotection may be elicited following damage or deterioration caused by aging, genetic s, environmental changes, physical stress or injury, endogenous or exogenous ical or chemical factors (e.g., neurotropins, vitamins, alcohol, pharmaceutical agents, ischemia and the like), stroke, or the like.

As used herein, the term acting” refers to actions direCted to creation of a spatial relationship between the cell(s) and the neurotrophic factor(s) (or vehicle containing the neurOtrophic factor(s)), provided for a predetermined and ied time and under conditions appropriate to render a desired biological response in the contacted cell(s), such as neuroprotection. The spatial relationship between the cell(s) and the neurotrophic factor(s) can include direct contaCt, y the factor elicits a response on the contacted cell’s surface direCtly or enters the cell ”or 'urther , or ct contact, whereby the factor s a response on the cell through ellular signaling (e.g., following activation or modification 0: another substance which interacts with the contacted cell). As applied herein, a biological response includes a neuroprotective response or any other response by the cell(s) that causes an , inhibition, reduction, or regression o; a disorder of the cell(s).

In particular embodiments of the invention, contaCting neuronal cells by a neurotrophic factor takes place in Vitro. ”In vitro” can include in cell or tissue cultures, or test tube 3O cultures. In other embodiments, the ting of neuronal cells takes place in vivo. ”In Vivo” can include animal models (e.g., transgenic animals such as mice or rats) or living subjects as defined herein, including humans. In yet other embodiments, the contacting of neuronal cells takes place ex Vivo. ”Ex vivo” can include intact tissues, organs or systems, or portions thereof, derived from a subject that have been isolated or extracted from treir source. As used herein, the term “isolated" means that the item bed is segregated or separated (physically or cremically). Something that is isolated may still be within a SLbjeCt or exist e a subject. As used , the term ted” means that the item described is removed from the SLbject and exists outside the subject.

In some embodiments of the invention, the neuronal cell types anenable to treatment by the methods of the invention se ganglion cells or protoreceptor cells. In one particular l0 embodiment, the neuronal cell type amenable to treatment by the methods of the invention comprises retinal ganglion cells.

.—The rophic factors of the present invention may be inant or isolated neurotrophic factors and may also be either a recombinant or isolated human neurotrophic factor. As used herein with regard to genes, or fragments thereo:, or gene products, or fragments thereof, the term ”isolated” is defined as being removed from cells of an animal and/or purified for use in the methods described. As used herein, the term ”gene” refers to a polynucleotide derived from a chromosome that codes for RNA and proteins. A gene, as used herein, may or may not include all introns, exons, promoter s, non—coding regions, and the like, that are associated with the specific gene.

Tne present invention is also directed to a pharmaceutical composition or medicament comprising a rophic , such as MANF, CDNF or combinations thereof. The pharmaceutical composition can also include other pharmaceutically acceptable compounds, excipients, additives, fillers, binders, adjuvants, or carriers or vehicles ed based upon the chosen route of administration and standard pharmaceutical practice. As such, the neurotrophic factor(s) may be used in the manufacture or preparation 0: medicaments and ceutical compositions. Also, the medicamerts and pharmaceutical compositions comprising the neurotrophic factors described may be used for the treatment of disorders as described herein.

The present invention is also directed to a kit 0: parts comprising neurotrophic (s) and other reagents needed to perform the method(s) of the present invention. The kit of parts can also include instructions for use. The neurotrophic factor(s) and ts can be included if one or more itions, and each neurotrophic factor and reagent can be in a composition in combination with a suitable vehicle, or can be present independently. The kit of parts may include MANF, CDNF, or combinations thereof, as purified proteins (recombinant or isolated from an animal) or as purified polynucleotides binant or isolated from an animal).

In other enbodiments, the kit 0: parts includes labeled kers specific x) particular neural cell types, such as photoreceptor kers or retinal ganglion cell biomarkers, nce standards, and. additional components that would. be identifiable by those skilled in the art upon reading the present disclosure.

Without further elaboration, it is ed that one skilled in the art can, using tfe preceding description, utilize the presert invention to its lullest extent. The following examples are 0 'ered by way 0" il‘ustratior , not by way of limitation.

While specific examples have been provided, the above description is illustrative and not restrictive. Anyone or more of the features 0: the previously described embodiments can be ed in any manner with one or more featJres of any other ments in the present invention. Furthern ore, many variations of the invention will become apparent to those skilled in the art ipon review 0: the specification.

All ations and patent documents cited in this application are i qcorporated by reference in pertinent part tor all purposes to the same extent as if each individual publication or patent document were so individually denoted. By citation of s references in this document, Applicant does not admit any particular reference is "prior art" to their invention.

Examples The methods and compositions herein described and the related kits are further il ‘ustrated in the following examples, which are provided. by way of illustration and are not intended. to be limiting. It will be appreciated that variations in proportions and alternatives in elements 0: the components shown will be apparent to those skilled in the art and are within the scope of embodiments of the present invention. Theoretical s are presented with the understanding that Applicant does not seek to be bound by the theory presented.

The following material and s were used for all the methods ard conpositions exemplified herein. g o: recombinant human MANF and CDNF proteins: The open reading frames (ORF) of MANF (SEQ ID NO: 1) and CDNF (SEQ :D NO: 2) were each cloned by polymerase chain on (PCR) from himan brain cDNAs, and ing cloned sequences were confirned. Each ORE was subcloned. into the expression vector pQE3O n, Valencia, CA), containing a 6xHis—tag coding sequence to the N— terminus in frame. Next, the expression vectors containing each of MANF and CDNF scqu nc s w r cxprcss d. in E. coli (Xn—blue, Stratagene, La Jolla, CA), and the corresponding expressed ns were purified by imnobilized—metal affinity chromatography on Ni—NTA Agarose colens (Qiagen) under native conditions. The elated protein was bu ”er—exchanged to phosphate— buffered saline (PBS) and stored at —80°C in small aliquots until use. The appropriate human MANF protein sequence is represented by SEQ ID NO: 3, and the appropriate human CDNF protein sequence is represented by SEQ ID NO: 4.

Visualization of purified MANF and CDNF proteins: 1 Mg and/or ug of purified protein were electrophoresed on a 4—12% NuPAEG gel and visualized with Coomassie blue to confirm purification and proper molecular weights. Molecular weight markers (MW) were electrophoresed in a lane next to the 1 ug and/or 5 ug samples. 3O Transgenic animals: Transgenic rats carrying’ the murine rhodopsin mutation 8334ter, known as SB34ter—3 rats, were generated and ed. as previously described (Liu et al., Photoreceptor protection assay: Single intravitreal injections of MANF and PBS (control) were given to S334ter3 rats.

Specifically, 6ug MANF was injected into one eye of a rat at postnatal day (PD) 9, and BML PBS was contemporaneously injected into the remaining eye of the same rat as a control. Injections were performed through a 33—gauge needle connected to a lOuL microsyringe (Hamilton, Reno, NV). Animals were sacrificed at P321 and each eye harvested, plastic embedded, and sectioned as usly described (Liu et al., (1999)). The resulting semi—thin retinal sections were stained with toluidine blue and examined by light microscopy. Similar experiments were performed using 6Mg CDNF.

Cone photoreceptor outer t (COS) tion assay: Single intravitreal injections of MANF and PBS (control) were given to 8334ter3 rats. 6Mg MANF was injected into one eye 0; a rat at postnatal day (P3) 20, and BuL PBS was contemporaneously ed into the remaining eye of the same rat as a control.

Injections were performed through a 33—gaage needle connected to a lOuL microsyringe (Hamilton, Reno, NV). Animals were sacrificed :0 days after treatment at P330 and each eye harvested. Whole—mounted retinas were stained with Alexa Fluor 488 conjugated PNA (peanut glutinin), which specifically binds to the outer segments 0: cone photoreceptors, and examined by fluorescence microscopy. Similar experiments were performed using 6ug CDNF.

Optic nerve crush assay: Retinal ganglion cells 0: wild—type Sprague Dawley rats were labeled by retralabeling with — Gold. One week after labeling, the optic nerves were crushed and immediately followed with intravitreal injection of 6ug MANF. Two weeks after the nerve crush and treatment, the rats were iced. and retinas harvested. Whole—mounted retinas were examined by fluorescence microscopy.

MANF protein expression analysis 0“ retina: Sgual s of protein extracts from s 0' wi d—type Sprague Dawley rats a, PD 1, P3 5, PD 8, P3 10, P3 12, PD :.6, PD 25, PD 30, P3 40 and PD 60 were run on polyacrylanide gels, transferred to membranes and probed with antibodies for MANF and n. Structural pro:ein, B—Actin, expression was analyzed to ensure consistent g of protein extracts at each oint analyzed.

Example 1: Purification of recombinant human mesencephalic astrocyte—derived rophic faCtor (MANF) To test candidate neurotrophic factors for neuroprotective properties, recombinant human MANF and CDNF proteins were generated and purified for further experimentation. Recombinant human MANF was expressed in E. coli, purified, and visualized as bed above in materials and methods. The results illustrated in FIGURE 1 shOW' that 1 Mg and. 5 Mg of purified. MANF are visualized as a single band of 20k3a. Lane 1 depicts the molecular weight markers (MW); Lane 2 depicts ; Mg ed MANF; and Lane 3 depiCts 5 Mg purified MAkF. ”KD” refers to altons.” Example 2: Purification of recombinant human dopamine neurotrophic factor (CDNF) CDNF was also utilized as a candidate neurotrophic factor with neuroprotective properties. Recombinant human CDNF was expressed in E. coli, purified, and visualized as described above in materials and methods. The results illustrated in h GURE 2 show that 5 pg of purified CDNF is ized as a single band of lBkDa. Lane 1 depicts the molecular weight s (MW); Lane 2 depicts 5 pg purified CDRF. “KD” refers to “kilodaltons.” Example 3: Protection by MANF in the retina I1 0: photoreceptors o; a retinal degeneration rodent model In search of neurotrophic factors that could rescue photoreceptors in retinal degenerative disorders, including inherited retinal disorders (e.g., retinitis pigmentosa), age— related macular degeneration, and glaucoma, recombinant human MANF protein was tested for photoreceptor proteCtive properties in a retinal degeneration rodent model. To this end, 8334ter3 enic rats were utilized. because of their characterized progressive retinal photoreceptor degeneration (Liu et al., (1999)).

The results illustrated. in b GURd. 3A show that, in PBS (control) d S334ter3 rats, the outer nuclear layer of tne retina had only one row 0: nuclei (see arrowhead in FIGURL-‘J 3A) at P3 2;. The results illuStrated in

Claims (18)

Claims

1. Use of an effective amount of mesencephalic astrocytederived neurotrophic factor (MANF) consisting of a fragment of SEQ ID NO:3 that is from 85% to 100% the length of SEQ ID NO:3 5 in the preparation of a medicament for treating a retinal disorder selected from the group consisting of retinitis pigmentosa, age-related macular degeneration, and glaucoma.

2. The use of claim 1, wherein said retinal disorder is 10 retinitis pigmentosa.

3. The use of claim 1, wherein said medicament further comprises a pharmaceutically acceptable carrier. 15

4. The use of claim 3, wherein the pharmaceutically acceptable carrier is a saline solution.

5. The use of claim 1, wherein said medicament is for administration to an eye of said subject. 20

6. The use of claim 5, wherein said administration is by injection.

7. The use of claim 6, wherein said injection is an 25 intravitreal injection.

8. The use of claim 1, wherein said medicament is for administration in an area adjacent to the eye. 30

9. The use of claim 1, wherein said retinal disorder is agerelated macular degeneration.

10. The use of claim 1, wherein said retinal disorder is glaucoma. 35

11. Use of an effective amount of MANF consisting of a fragment of SEQ ID NO:3 that is from 85% to 100% the length of SEQ ID NO:3 in the preparation of a medicament for promoting neuroprotection in a neuronal cell selected from the group 40 consisting of a retinal ganglion cell and a photoreceptor cell.

12. The use of claim 11, wherein said contacting occurs in vivo . 45

13. The use of claim 11, wherein said contacting occurs in vitro.

14. The use of claim 11, wherein said MANF is a recombinant neurotrophic factor. 50

15. The use of claim 11, wherein said MANF is a human neurotrophic factor.

16. The use of claim 15, wherein said MANF is a recombinant 55 human neurotrophic factor. 27 7146111_1 (GHMatters) P95690.NZ PETERB

17. The use of claim 1, substantially as hereinbefore described with reference to any one of the Examples. 5

18. The use of claim 11,substantially as hereinbefore described with reference to any one of the Examples.