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當(dāng)前位置:上??ㄅ锟萍加邢薰?/a>>>公司動(dòng)態(tài)>>Science子刊:治療糖尿病的新策略
生物通報(bào)道:來(lái)自的Genentech公司的研究人員發(fā)表了題為“Amelioration of Type 2 Diabetes by Antibody-Mediated Activation of Fibroblast Growth Factor Receptor 1”的文章,介紹了一種替代FGF21生長(zhǎng)因子蛋白治療方法的新策略,推出了對(duì)抗高血糖的新抗體,這將有助于糖尿病藥物研發(fā),相關(guān)成果公布在Science-Translational Medicine雜志上。
糖尿病是一種由多種病因引起的以慢性高血糖為特征的代謝紊亂,伴有因胰島素分泌和/或作用缺陷引起的糖、脂肪和蛋白質(zhì)代謝異常。II型糖尿病以胰島素抵抗為主,伴胰島素分泌不足,至以胰島素分泌不足為主伴胰島素抵抗,在沒(méi)有足夠胰島素供應(yīng)的情況下,身體無(wú)法將血糖從血液中運(yùn)送到那些用糖作為能源的細(xì)胞內(nèi)。 相反,糖會(huì)在血液中積聚,并大肆破壞心臟、血管、神經(jīng)、眼睛甚或皮膚。
目前臨床上利用重組蛋白FGF21(成纖維細(xì)胞生長(zhǎng)因子)治療II型糖尿病,以及其它肥胖相關(guān)的疾病,但是這種臨床應(yīng)用缺乏藥代動(dòng)力學(xué)基礎(chǔ)。在這篇文章中,研究人員提出了一種替代性策略,利用拮抗抗FGFR1(FGF受體1)抗體——R1MAbs模擬FGF21的作用,結(jié)果表明這種抗體可以降低糖尿病小鼠的血糖水平。
研究人員通過(guò)給小鼠使用抗體,在一周的時(shí)間里,這些接受了抗體注射的糖尿病小鼠的血糖,相比于對(duì)照組,出現(xiàn)了變化,降低至正常的水平,并且未出現(xiàn)任何副作用表現(xiàn),這一治療過(guò)程還幫助糖尿病小鼠減輕了體重。
總而言之,研究人員認(rèn)為脂肪組織中的FGFR1能作為FGF21的主要功能性受體,也是PGC-1α的上游調(diào)控因子,因此可以用于糖尿病,以及其其它肥胖相關(guān)的疾病中,抗體為基礎(chǔ)的治療的重要靶標(biāo)。而且值得關(guān)注的是研究還表明這一抗體在體內(nèi)能長(zhǎng)時(shí)間發(fā)揮作用,因此未來(lái)可利用這一新策略開(kāi)發(fā)針對(duì)糖尿病的新藥。
Science-Translational Medicine雜志是一份去年Science新出版的子刊,由美國(guó)國(guó)立衛(wèi)生研究院(NIH)前任院長(zhǎng)伊萊亞斯·瑞爾霍尼出任期刊的科學(xué)顧問(wèn),周刊主要關(guān)注加速將我們?cè)谏餀C(jī)制研究領(lǐng)域的驚人進(jìn)展轉(zhuǎn)化為預(yù)防和治療人類疾病的新方法。
原文摘要:
Amelioration of Type 2 Diabetes by Antibody-Mediated Activation of Fibroblast Growth Factor Receptor 1
Clinical use of recombinant fibroblast growth factor 21 (FGF21) for the treatment of type 2 diabetes and other disorders linked to obesity has been proposed; however, its clinical development has been challenging owing to its poor pharmacokinetics. Here, we describe an alternative antidiabetic strategy using agonistic anti-FGFR1 (FGF receptor 1) antibodies (R1MAbs) that mimic the metabolic effects of FGF21. A single injection of R1MAb into obese diabetic mice induced acute and sustained amelioration of hyperglycemia, along with marked improvement in hyperinsulinemia, hyperlipidemia, and hepatosteatosis. R1MAb activated the mitogen-activated protein kinase pathway in adipose tissues, but not in liver, and neither FGF21 nor R1MAb improved glucose clearance in lipoatrophic mice, which suggests that adipose tissues played a central role in the observed metabolic effects. In brown adipose tissues, both FGF21 and R1MAb induced phosphorylation of CREB (cyclic adenosine 5′-monophosphate response element–binding protein), and mRNA expression of PGC-1α (peroxisome proliferator–activated receptor-γ coactivator 1α) and the downstream genes associated with oxidative metabolism. Collectively, we propose FGFR1 in adipose tissues as a major functional receptor for FGF21, as an upstream regulator of PGC-1α, and as a compelling target for antibody-based therapy for type 2 diabetes and other obesity-associated disorders.
來(lái)源:生物通
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