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  5. 開發煙醯胺單核苷酸搭載奈米顆粒應用於視網膜神經節細胞再生
 
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開發煙醯胺單核苷酸搭載奈米顆粒應用於視網膜神經節細胞再生

Other Title
Development of Nicotinamide mononucleotide Loaded Nanoparticle Applied in Retinal Ganglion Cell Regeneration
Type
thesis
Date Issued
2024-07-18
Author(s)
朱培欣
Advisor
曾靖孋; 楊添鈞
Subjects
系所名稱:奈米醫學工程研究所碩士班
Publisher
奈米醫學工程研究所碩士班
Description
學位別:碩士
關鍵字:奈米顆粒; 視網膜神經節細胞 (RGC); 視網膜色素上皮 (RPE); 細胞老化; 細胞凋亡; 煙酰胺單核苷酸 (NMN); 煙酰胺腺嘌呤二核苷酸 (NAD+)
論文公開日期:2024-08-14
Abstract
視網膜病變(黃斑部病變等),長並隨活性氧增加,進而造成氧化壓力的異常、炎症與細胞凋亡或老化的莊況出現。而免疫調節劑的菸鹼醯胺腺嘌呤二核苷酸(Nicotinamide adenine dinucleotide, NAD+)具有調節氧化壓力、協同修復DNA、抑制發炎的能力,但NAD+易受環境影響導致變性,故本實驗採用NAD+的前體,菸醯胺單核苷酸(Nicotinamide Mononucleotide, NMN)作為使用藥物。由於傳統眼部藥物遞送屏障效能低,而奈米藥物具有提升眼部藥物生物利用率和長效釋放之優勢,所以本研究將NMN搭載進奈米明膠顆粒,以保護藥物與提升藥物至後眼部之效能。
因此本研究目的是使用奈米明膠做為奈米載體,搭載NMN之奈米藥物,將其應用於視網膜上皮細胞與視網膜神經節細胞,探討其在經過氧化壓力損傷後於不同NMN劑型藥物作用下,其細胞凋亡與衰老狀況。
材料方面,使用粒徑分析儀進行奈米顆粒大小確認與表面電位分析、奈米顆粒追蹤分析檢測奈米材料特性、穿透式電子顯微鏡為顆粒型態觀察、利用HPLC檢測奈米藥物的釋放曲,結果顯示NMN-GNP粒徑大小為303.4 ± 1.2 nm、帶正電賀18.6 ± 0.3 Mv、濃度為3.58×1011 ± 5.05×1010 particles/mL、且通過藥物釋放證實了奈米劑型的緩慢釋放功效。
體外測試,將視網膜色素上皮細胞、視網膜神經節細胞與奈米顆粒進行共培養,觀察經氧化壓力損傷前後的細胞活性與衰老相關基因的表達變化以及凋亡,結果顯示奈米劑型在衰老染色(β-Galactosidase)或是衰老相關基因(Real-time polymerase chain reaction, qPCR)均比未包覆藥物有更顯著的預防細胞在氧化壓力下受損的能力
URI
https://203.71.86.71/handle/123456789/9984

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