圖片來源:medicalxpress.com
2015年11月6日 訊 /生物谷BIOON/ --近日,來自太平洋大學的科學家通過研究開發了一種新方法,其可以明顯延長機體肽類的生命,相關研究發表於國際雜誌Nature Chemical Biology上,該研究或為後期開發新型肽類藥物來治療癌症及其它疾病提供思路。
研究者Mamoun Alhamadsheh說道,蛋白肽類所擁有的巨大治療潛力並沒有被科學家們意識到,主要是因為這些肽類在血液中不能夠維持太長時間;本文研究中我們利用一種特殊的化合物對肽類進行標記,使其可以通過在血液中較大的蛋白分子上「打便車」,利用這種方法我們就可以使得肽類在血液中免於被降解,而且可以在機體血液中維持較長時間。
蛋白肽類可以被工程化操作來治療一系列疾病,包括癌症和糖尿病等,這些小型的胺基酸鏈具有非常大的潛力、選擇性,而且相比大分子要更加安全一些,但肽類較短的壽命迫使科學家們不得不進行大劑量且頻繁給予患者來增加作用效率。本文中研究者利用新技術可以使得肽類壽命延長,這就可以降低肽類藥物的使用頻率,從而將幫助患者節約藥物成本且提高患者的依從性。
最後研究者Sravan Penchala指出,我們認為本項研究對於改善人類健康又邁進了一步,文章中我們採用的方法具有巨大的應用潛力,其不光可以幫助治療疾病,還可以增強對患者機體的成像及診斷。(生物谷Bioon.com)
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A biomimetic approach for enhancing the in vivo half-life of peptides
Sravan C Penchala, Mark R Miller, Arindom Pal, Jin Dong, Nikhil R Madadi, Jinghang Xie, Hyun Joo, Jerry Tsai, Patrick Batoon, Vyacheslav Samoshin, Andreas Franz, Trever Cox, Jesse Miles, William K Chan, Miki S Park & Mamoun M Alhamadsheh
The tremendous therapeutic potential of peptides has not yet been realized, mainly owing to their short in vivo half-life. Although conjugation to macromolecules has been a mainstay approach for enhancing protein half-life, the steric hindrance of macromolecules often harms the binding of peptides to target receptors, compromising the in vivo efficacy. Here we report a new strategy for enhancing the in vivo half-life of peptides without compromising their potency. Our approach involves endowing peptides with a small molecule that binds reversibly to the serum protein transthyretin. Although there are a few molecules that bind albumin reversibly, we are unaware of designed small molecules that reversibly bind other serum proteins and are used for half-life extension in vivo. We show here that our strategy was effective in enhancing the half-life of an agonist for GnRH receptor while maintaining its binding affinity, which was translated into superior in vivo efficacy.