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  5. 靈芝子實體細胞壁組成SACCHACHITIN對B16細胞黑色素形成抑制之探討
 
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靈芝子實體細胞壁組成SACCHACHITIN對B16細胞黑色素形成抑制之探討

Other Title
Inhibition of Melanogenesis in B16 cells by SACCHACHITIN, a Cell Wall Component from Ganoderma tsugae
Type
thesis
Date Issued
2006
Author(s)
張湘寧
Advisor
蘇慶華
Subjects
系所名稱:醫學科學研究所
Description
C0178715
Abstract
本研究以SACCHACHITIN(靈芝多醣幾丁質)進行研究,探討其對酪胺酸?活性的影響。由於之前已證實此材料能有效抑制蛋白質水解酵素(如MMP-1,MMP-8,MMP-9)以及脂肪?(Lipase),所以本實驗將進一步探討其抑制酪胺酸?活性之成效。本研究首先探討對抑制蕈酪胺酸? (Mushroom tyrosinase)活性的影響性,結果顯示:2.5 mg/ml的抗壞血酸顯示出非常顯著的抑制作用,在不同來源的幾丁聚醣中,只有SACCHACHITIN呈現劑量依存反應(dose-dependent reaction)其IC50約為17.2 mg/ml。接著在細胞模式下,SACCHACHITIN對B16細胞型態和增生沒有不良影響,不具有細胞毒性。再進行B16細胞黑色素含量的分析,加入誘導劑α-MSH濃度為25 nM所增加的百分比率最高,可以提高3.37倍的黑色素含量。不論在無或有誘導劑之下, SACCHACHITIN均可以減少B16細胞產生黑色素,和降低B16細胞之酪胺酸?活性,呈現劑量依存反應(dose-dependent reaction)。西方點墨法再次確認SACCHACHITIN確實能夠抑制B16細胞中酪胺酸?蛋白質的表現,尤其是當SACCHACHITIN濃度為2 mg/ml時,效果更加顯著,同時且隨著SACCHACHITIN的微粒化,有增進抑制B16細胞中酪胺酸?蛋白質表現的結果。
URI
https://203.71.86.71/handle/123456789/12372
https://hdl.handle.net/11296/c2rkeh
File(s)
No Thumbnail Available
Name

C0178715.pdf

Size

8.41 MB

Format

Adobe PDF

Checksum

(MD5):0d827cedc6bc3542f0a95c97293308c7

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