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テクノビット包埋
その後 6.8%シュクロース in PBSで4℃、over night。可能な限り氷上にて振とうさせる。
100%アセトン A 60min →液を交換した直後更に白濁するようであれば更に液を新調する。
硬化剤U 1ml
包埋液を新たにヒストフォームに700μl程度流し込みサンプルをその中に入れる。 包埋液を溢れない程度にたっぷり足してその上にカバーフォイルを載せて密封する。 ヒストフォームを4℃の冷蔵庫の中で氷上にてover night。
テクノビット3040を 【液体1:粉末2〜3】の割合で混和し素早くヒストブロック内に流し込む。 完全に固まったら(1hour〜)ヒストフォームから取り外しサンプル名を記入する。 標本ブロックは−20℃で保存する。
Plastic embedding to detect GFP signalFour weeks after surgery, mice were sacrificed with overdose of pentobarbital, and perfused at a constant pressure via the left ventricle with 0.9% sodium chloride solution, followed by perfusion fixation with 4% paraformaldehyde in PBS. The injured arteries were further fixed in 4% paraformaldehyde overnight at 4 oC. The arteries were illuminated with a GFP-lighting system (Illumatool Tunable Lighting System, LT-9800, Lightools Research, Encinitas, CA) and observed using a cooled CCD camera (VB-6010, Keyence, Osaka). To preserve GFP signal for histological analyses, the arteries were embedded in plastic resin (Technovit 8100, Heraeus Kulzer, Wehrheim, Germany) according to the manufacturer’s instructions. Briefly, the arteries were washed overnight in PBS containing 6.8% sucrose at 4 oC, dehydrated in 100% acetone, and embedded using a polyethylene capsule (Capsule 414-2, Energy Beam Sciences, Inc, Agawam, MA) as a mold. The polymerized block was fixed onto a block (Histobloc, Heraeus Kulzer) with an adhesive agent (EP001, Semedain, Tokyo) and cut using a rotary microtome (HM335E, MICROM International GmbH, Walldorf, Germany) with a disposable knife (Histoknife, Heraeus Kulzer). Thin sections (3-4 μm) were stretched in a water bath, mounted on silanized slides (Matsunami, Tokyo) and dried for 2 hours at 37 oC. The sections were washed in PBS and used for immunofluorescence studies.
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