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  5. 犬蛔蟲抗微生物重組胜肽於皮膚傷口癒合相關纖維母細胞及角質細胞之分子機轉
 
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犬蛔蟲抗微生物重組胜肽於皮膚傷口癒合相關纖維母細胞及角質細胞之分子機轉

Other Title
The molecular effect of recombinant Toxocara canis antimicrobial peptides in wound-related fibroblast and keratinocyte
Type
thesis
Date Issued
2025-06-30
Author(s)
李瀚恩
Advisor
范家堃
Subjects
系所名稱:醫學科學研究所碩士班
Publisher
醫學科學研究所碩士班
Description
學位別:碩士
口試委員:鄭柏青; 莊定武; 范家堃
關鍵字:犬蛔蟲抗微生物重組胜肽、角質形成細胞、皮膚成纖維母細胞、細胞之增殖和遷移、傷口癒合、膠原蛋白
Abstract
根據世界衛生組織(World Health Organization, WHO)資料,2021年全球十大死因中,感染相關疾病導致超過1千萬人死亡,居全球死因第5位,更是中低收入國家的首要死因。抗生素的發明挽救了無數生命,然而長期及大量的濫用抗生素,細菌逐漸產生抗生素抗藥性(Antimicrobial resistance, AMR),使傳統抗生素療效降低,必須依賴更後線藥物,抗藥性細菌如抗甲氧苯青黴素的金黃色葡萄球菌(Methicillin-resistant Staphylococcus aureus, MRSA)、抗萬古黴素的腸球菌(Vancomycin-resistant Enterococci, VRE)等,引起嚴重的感染症。而抗菌胜肽(Antimicrobial Peptides, AMPs)是除了開發後線抗生素外的新興治療方案,相較於傳統的抗生素較不容易產生抗藥性,且副作用較低。
AMPs的來源很廣泛,如人體自己製造的LL-37、豬蛔蟲的Ascaris suum antibacterial factor(ASABF)等抗菌胜肽。在先前的實驗中發現,與豬蛔蟲同屬的犬蛔蟲(Toxocara canis, T. canis)成蟲蛋白亦具有抗菌的效果,並透過基因工程純化出犬蛔蟲抗微生物重組胜肽 (recombinant T. canis AMPs, rTcAMPs),並具有殺滅S. aureus和MDRSA的能力。有研究指出AMPs除了有抗菌的功能外,亦有抗發炎、促進傷口癒合、調節免疫系統等功效。因此,本研究以細胞模式探討rTcAMPs對參與傷口癒合過程的角質形成細胞(Keratinocytes)和皮膚成纖維母細胞(Skin fibroblast)之影響,透過細胞活性實驗(MTT assay)、傷口癒合實驗(Wound healing assay)、西方墨點法(Western blot)、定量反轉錄PCR(RT-qPCR),分析rTcAMPs在傷口癒合之分子機轉研究。
研究結果顯示,rTcAMPs對於對角質形成細胞及皮膚成纖維細胞活性影響皆沒有影響。傷口癒合方面,給予三種rTcAMPs (No. 9, 10, 11)的治療下,都能促進傷口癒合,增加傷口癒合的速度;並能促進皮膚纖成維母細胞釋出膠原蛋白(Collagen I)。在分子機制方面,rTcAMPs治療能上調皮膚成纖維母細胞及角質形成細胞的EGFR、KGF、COL1A1之mRNA水準;同時也能促進皮膚成纖維母細胞的Collagen1A1與α-SMA蛋白表現水準。
本研究證明了 rTcAMPs具有促進傷口癒合之功能,其分子作用機轉與提升細胞外基質相關蛋白(Collagen I、α-SMA)及生長因子(EGFR、KGF)表現有關。未來將進一步評估 rTcAMPs 應用於臨床傷口治療的可行性。
URI
https://203.71.86.71/handle/123456789/9177

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