JP7590751B2 - 浮遊系培養細胞への難水溶性被験物質の曝露方法 - Google Patents
浮遊系培養細胞への難水溶性被験物質の曝露方法 Download PDFInfo
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Description
難水溶性被験物質であるサリチル酸ヘキシル(Fluka社、オクタノール/水分配係数5.06)及びN,N-ジブチルアニリン(富士フィルム和光純薬社、オクタノール/水分配係数5.12)をそれぞれスクワラン(シュガースクワラン、日光ケミカルズ社)に溶解し、難水溶性被験物質のスクワラン溶液を調製した。300mgのスクワラン溶液及び300mgのパラフィンワックス(155°パラフィン、日本精蝋社)を1.5mLのマイクロチューブへ入れ、72℃にて60分間加熱溶解した。その後、室温まで冷却することにより固型物を得た。
THP-1細胞を10%ウシ胎児血清(FBS)、0.05mM 2-メルカプトエタノール、100単位/mLペニシリン、100μg/mLストレプトマイシンを添加したRPMI-1640培地を用いて培養し、細胞を回収した後、2.0×106個/mLになるように新しい培地で再懸濁し、細胞懸濁液を得た。500μLの細胞懸濁液を、マイクロピペットを用いて固型物の上に適用した後、37℃、5%CO2環境下で48時間培養した。
上記手法にて難水溶性被験物質を曝露した後のTHP-1細胞を回収し、染色用緩衝液で細胞を洗浄した。その後、ブロッキング溶液を加えて4℃にて15分間インキュベートした後、FITC標識抗CD86抗体、抗CD54抗体及びマウスIgG抗体で細胞を4℃にて30分間染色した。CD86及びCD54の発現量は、フローサイトメーターを用いて測定した。即ち、抗CD86抗体及び抗CD54抗体で処理された細胞の平均蛍光強度と、マウスIgG抗体で処理された細胞の平均蛍光強度の差を算出し、被験物質無しの場合の平均蛍光強度を100とした場合の相対蛍光強度を算出した。
CD84の相対蛍光強度が150%以上又はCD54の相対蛍光強度が200%以上の場合を陽性、その他の場合を陰性と判定した。
被験物質の濃度(重量%)は、(A)の含有量を(A)+(B)+(C)の含有量で除して算出した。
1)Takenouchi O et al、J. Toxicol. Sci.、38(4)、599-609、2013
Claims (3)
- 浮遊系培養細胞への難水溶性被験物質の曝露方法であって、(A)オクタノール/水分配係数が3.5以上である難水溶性被験物質、(B)スクワラン、(C)48~69℃に融点を有するパラフィンワックスを70℃以上に加熱溶解させた後に冷却して固型物を得た後、該固型物の上から浮遊系培養細胞の懸濁液を適用し、一定時間放置することを特徴とする、浮遊系培養細胞への難水溶性被験物質の曝露方法。
- 前記(C)48~69℃に融点を有するパラフィンワックスの含有量が、(A)+(B)+(C)の総量に対して50重量%以上である請求項1記載の浮遊系培養細胞への難水溶性被験物質の曝露方法。
- 請求項1又は2記載の曝露方法を用いた難水溶性被験物質のin vitro評価法であり、浮遊系培養細胞の一種であるヒト単球性白血病由来(THP-1)細胞上に発現される細胞表面マーカーCD86及びCD54の発現量を指標にした、難水溶性皮膚感作性物質のin vitro評価法。
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Citations (7)
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| JP2005075779A (ja) | 2003-09-01 | 2005-03-24 | Shiseido Co Ltd | 疎水性複合粉体及びそれを含む化粧料 |
| WO2006054415A1 (ja) | 2004-11-19 | 2006-05-26 | Sho Matsushita | 免疫応答修飾活性の試験管内評価方法 |
| JP2007127444A (ja) | 2005-11-01 | 2007-05-24 | Toyobo Co Ltd | 保湿性評価方法 |
| JP2008125453A (ja) | 2006-11-21 | 2008-06-05 | Shiseido Co Ltd | 難溶性物質の感作性代替試験方法 |
| JP2010172210A (ja) | 2009-01-27 | 2010-08-12 | Shiseido Co Ltd | 難溶性被験物質のための細胞毒性試験法 |
| JP2012246446A (ja) | 2011-05-30 | 2012-12-13 | Dow Corning Toray Co Ltd | 新規液状オルガノポリシロキサン及びその利用 |
| JP2019019129A (ja) | 2017-07-19 | 2019-02-07 | 学校法人明治大学 | コラーゲン産生促進剤 |
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| JPH07118122A (ja) * | 1993-10-26 | 1995-05-09 | Kao Corp | 油性固形物 |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005075779A (ja) | 2003-09-01 | 2005-03-24 | Shiseido Co Ltd | 疎水性複合粉体及びそれを含む化粧料 |
| WO2006054415A1 (ja) | 2004-11-19 | 2006-05-26 | Sho Matsushita | 免疫応答修飾活性の試験管内評価方法 |
| JP2007127444A (ja) | 2005-11-01 | 2007-05-24 | Toyobo Co Ltd | 保湿性評価方法 |
| JP2008125453A (ja) | 2006-11-21 | 2008-06-05 | Shiseido Co Ltd | 難溶性物質の感作性代替試験方法 |
| JP2010172210A (ja) | 2009-01-27 | 2010-08-12 | Shiseido Co Ltd | 難溶性被験物質のための細胞毒性試験法 |
| JP2012246446A (ja) | 2011-05-30 | 2012-12-13 | Dow Corning Toray Co Ltd | 新規液状オルガノポリシロキサン及びその利用 |
| JP2019019129A (ja) | 2017-07-19 | 2019-02-07 | 学校法人明治大学 | コラーゲン産生促進剤 |
Non-Patent Citations (2)
| Title |
|---|
| NARITA, Kazuto et al.,The Journal of Toxicological Sciences,2018年,Vol. 43, No. 3,pp. 229-240,DOI: 10.2131/jts.43.229 |
| TAKENOUCHI, Osamu et al.,The Journal of Toxicological Sciences,2013年,Vol. 38, No. 4,pp. 599-609,DOI: 10.2131/jts.38.599 |
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