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  5. 利用匍枝根黴菌(Rhizopus stolonifer)細胞壁組成RHIZOCHITIN作為生物支架探討生物降解性及生物相容性
 
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利用匍枝根黴菌(Rhizopus stolonifer)細胞壁組成RHIZOCHITIN作為生物支架探討生物降解性及生物相容性

Other Title
Biodegradability and Biocompatibility of the Scaffold Derived from Cell Wall Component of Rhizopus stolonifer
Type
thesis
Date Issued
2008-07-10
Author(s)
黃耀正
Advisor
蘇慶華
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:蘇慶華
共同指導教授:
口試委員:蘇正堯;許元勳
中文關鍵字:溶菌酶,生物降解性,生物相容性,匍枝根黴菌
Abstract
本研究利用延緩孢子產生的突變Rhizopus stolonifer F6菌株,經液體培養基培養得到海綿狀的菌絲墊。此菌絲利用1N NaOH 在121oC處理20分鐘後凍乾得到的物質稱為RHIZOCHITIN (RC)。RC再經95%酒精沖洗,以去除非皂化的酯類後得到的物質稱為alcohol-treated RHIZOCHITIN (ARC)。市售的正向控制組BESCHITIN-W (BC)與RC和ARC作為生物支架分別進行體外和體內的生物相容性和生物降解性測試。體外測試包括溶菌酶分解和纖維母細胞(L-929)培養,分別看生物支架前後重量改變與顯微鏡觀察(光學顯微鏡與電子顯微鏡)結構前後是否不同,得知溶菌酶在前三週RC和ARC材料重量減少明顯比BC還要少,表示RC和ARC不會很明顯的被溶菌酶分解,反之BC就明顯的被分解,在SEM中也可看到三者結構的改變。RC和ARC不會影響纖維母細胞的存活,並且在細胞培養中也可以發現,RC和ARC材料重量減少,可知L-929會對RC和ARC產生分解作用,但是BC不僅會降低L-929存活率外,而且只可以分解少許的材料。體內研究證明將RC和ARC植入SD大鼠皮下組織發現在兩週已完全被分解,然而BC在四週時還可被取出,表示BC在體內分解速度慢於RC和ARC。實驗中RC、ARC和BC植入皮下組織均不會造成皮膚過敏和刺激性現象產生。最後,在植入後四週,利用直徑為8 mm大小的鑽孔器,在植入的區域取出組織,進行HE和PAS染色,兩者結果均顯示RC和ARC在體內被分解的速度遠大於BC。本研究得知從R.stolonifer F6細胞壁組成成分的物質,是具有生物相容性與生物降解性。
URI
https://203.71.86.71/handle/123456789/12682
https://hdl.handle.net/11296/44yz34
File(s)
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C0179099.pdf

Size

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Format

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Checksum

(MD5):6b078432d9c91682331b6dbdd3928694

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Name

C0187202.pdf

Size

11.59 MB

Format

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Checksum

(MD5):c0472aa470c555e992e876d10b9790d4

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