近期,全球多肽和寡核苷酸(TIDES)領(lǐng)域迎來系列進(jìn)展。諾和諾德(Novo Nordisk)基礎(chǔ)胰島素/胰高糖素樣肽-1受體激動(dòng)劑(GLP-1RA)周制劑依柯胰島素司美格魯肽注射液、先為達(dá)生物cAMP偏向型GLP-1RA埃諾格魯肽注射液在中國獲批上市。再生元(Regeneron Pharmaceuticals)公布了其與翰森制藥合作開發(fā)的GLP-1/葡萄糖依賴性促胰島素多肽(GIP)雙受體激動(dòng)劑奧洛替肽(olatorepatide)的3期臨床試驗(yàn)的積極頂線數(shù)據(jù)。本文將節(jié)選其中部分重要進(jìn)展做簡單介紹,僅供讀者參閱。
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依柯胰島素司美格魯肽注射液:在中國獲批上市
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近日,中國國家藥品監(jiān)督管理局(NMPA)正式批準(zhǔn)了依柯胰島素司美格魯肽注射液(商品名:諾和杰)在中國的上市申請(qǐng)。新聞稿指出,諾和杰是全球首個(gè)獲批的基礎(chǔ)胰島素/GLP-1RA周制劑,由胰島素周制劑依柯胰島素和GLP-1RA周制劑司美格魯肽組成,適用于接受基礎(chǔ)胰島素或GLP-1RA治療后血糖控制不佳的成人2型糖尿病患者,在飲食和運(yùn)動(dòng)基礎(chǔ)上聯(lián)合口服降糖藥物進(jìn)行治療。
諾和杰的兩個(gè)組分,基礎(chǔ)胰島素和GLP-1RA聯(lián)合治療能夠發(fā)揮協(xié)同互補(bǔ)優(yōu)勢(shì),實(shí)現(xiàn)在增強(qiáng)療效的同時(shí)減少胰島素治療帶來的體重增加和低血糖風(fēng)險(xiǎn)。研究結(jié)果顯示,在已使用基礎(chǔ)胰島素治療的成人2型糖尿病患者中,諾和杰組糖化血紅蛋白(HbA1c)<7%的達(dá)標(biāo)率是基礎(chǔ)胰島素組的2倍(72% vs 36%);低血糖發(fā)生率相比基礎(chǔ)胰島素組降低78%,體重獲益明確。此外,諾和杰的司美格魯肽組分具有多效性作用,在血糖控制之外,可能協(xié)助改善成人2型糖尿病患者的其他代謝危險(xiǎn)因素。COMBINE 1和COMBINE 3研究的附加分析顯示,接受諾和杰治療的患者在腰圍、血壓和血脂譜方面均觀察到較基線改善,且相較于胰島素治療,其改善的幅度更大。
埃諾格魯肽注射液:在中國獲批上市
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先為達(dá)生物宣布,cAMP偏向型GLP-1受體激動(dòng)劑埃諾格魯肽注射液獲得NMPA,適用于在控制飲食和增加體力活動(dòng)基礎(chǔ)上對(duì)成人超重/肥胖患者的長期體重管理。基于cAMP偏向型GLP-1受體激動(dòng)機(jī)制,埃諾格魯肽注射液可高選擇性激活cAMP信號(hào)通路、最大程度減少β-arrestin募集,與傳統(tǒng)非偏向型GLP-1RA形成明顯差異。這一機(jī)制直接帶來兩大核心優(yōu)勢(shì):一是減重效果強(qiáng)效持久,全程無明顯平臺(tái)期;二是在降低體重的同時(shí),同步改善代謝、減少慢病風(fēng)險(xiǎn)。
埃諾格魯肽注射液減重適應(yīng)癥的獲批主要基于其在中國超重或肥胖成人中開展的一項(xiàng)3期臨床試驗(yàn)SLIMMER。基于療法策略,第40周時(shí),埃諾格魯肽呈現(xiàn)出劑量依賴性體重降低,最高劑量(2.4 mg)至第48周時(shí),體重降幅提升至15.4%(安慰劑校正后為15.1%),92.8%的受試者實(shí)現(xiàn)≥5%的臨床意義體重下降。79.6%和63.5%的受試者分別達(dá)到了≥10%和≥15%的體重下降。接受埃諾格魯肽治療的患者在48周治療結(jié)束時(shí),體重仍在持續(xù)下降,未達(dá)到平臺(tái)期,這表明延長埃諾格魯肽治療時(shí)間可能實(shí)現(xiàn)更大的體重降幅。除顯著體重降低外,埃諾格魯肽組可顯著改善其他關(guān)鍵的心血管代謝風(fēng)險(xiǎn)指標(biāo),包括腰圍、血壓、血脂、HbA1c、空腹血糖、胰島素水平和胰島素敏感性標(biāo)志物HOMA-IR。平均尿酸水平降幅高達(dá)54.3 μmol/L,高尿酸血癥發(fā)生率較安慰劑組更低。此外,埃諾格魯肽可顯著降低肝臟脂肪含量,在基線肝臟脂肪含量≥8%的受試者中,埃諾格魯肽2.4 mg組第40周時(shí)肝臟脂肪含量較基線的平均百分比變化達(dá)到-53.1%。所有劑量治療組的肝酶水平均較安慰劑組顯著降低。
奧洛替肽:公布3期臨床試驗(yàn)數(shù)據(jù)
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再生元宣布,其合作伙伴翰森制藥公布了奧洛替肽在中國開展的3期臨床試驗(yàn)的積極頂線數(shù)據(jù)。該研究評(píng)估了奧洛替肽用于治療成人肥胖或超重患者的療效與安全性。奧洛替肽是一種新型GLP-1/GIP雙受體激動(dòng)劑。根據(jù)雙方的戰(zhàn)略授權(quán)協(xié)議,再生元擁有在中國大陸、香港和澳門以外地區(qū)的獨(dú)家臨床開發(fā)和商業(yè)權(quán)益,并計(jì)劃于2026年晚些時(shí)候啟動(dòng)全球3期注冊(cè)性臨床項(xiàng)目。
這項(xiàng)隨機(jī)、雙盲、安慰劑對(duì)照3期試驗(yàn)共納入604名成人患者,評(píng)估了每周一次皮下注射5 mg、10 mg或15 mg奧洛替肽與安慰劑在48周內(nèi)的效果。研究達(dá)到共同主要終點(diǎn):與安慰劑相比,奧洛替肽顯著降低體重,并使更高比例的患者實(shí)現(xiàn)至少5%的體重減輕。數(shù)據(jù)顯示,接受奧洛替肽治療的患者在第48周平均體重減輕達(dá)19%,97%的患者體重下降≥5%。此外,奧洛替肽展現(xiàn)出良好的胃腸道耐受性,惡心和嘔吐的平均發(fā)生率分別低于10%和5%。
一體化平臺(tái)助力多肽藥物開發(fā)
多肽藥物已經(jīng)成為重要?jiǎng)?chuàng)新藥物模式,優(yōu)化其藥物代謝與藥代動(dòng)力學(xué)(DMPK)特征,已成為推動(dòng)候選分子成功進(jìn)入臨床階段的關(guān)鍵環(huán)節(jié)之一。與傳統(tǒng)小分子相比,多肽往往面臨酶降解快、體內(nèi)暴露不足、清除率高及跨膜轉(zhuǎn)運(yùn)受限等挑戰(zhàn),因此需要以機(jī)制為導(dǎo)向的系統(tǒng)化DMPK策略。圍繞這些特點(diǎn),藥明康德DMPK團(tuán)隊(duì)構(gòu)建了面向多肽分子的綜合優(yōu)化體系,通過整合體外穩(wěn)定性研究、體內(nèi)藥代評(píng)價(jià)與生物分析技術(shù),支持研發(fā)團(tuán)隊(duì)在早期階段即識(shí)別影響藥代行為的關(guān)鍵因素,并實(shí)現(xiàn)數(shù)據(jù)驅(qū)動(dòng)的分子優(yōu)化決策。
基于多肽DMPK策略專題研究與實(shí)踐經(jīng)驗(yàn),團(tuán)隊(duì)通過選擇與生理環(huán)境高度相關(guān)的研究體系,對(duì)多肽在全血、血漿、溶酶體及肝腎S9等多種生物基質(zhì)中的穩(wěn)定性與代謝路徑進(jìn)行系統(tǒng)評(píng)估,從機(jī)制層面解析降解模式與清除機(jī)制,為序列修飾與遞送策略優(yōu)化提供依據(jù)。同時(shí),結(jié)合跨物種體內(nèi)PK研究與組織分布分析,可進(jìn)一步建立體外與體內(nèi)結(jié)果之間的關(guān)聯(lián)關(guān)系,提升藥代預(yù)測(cè)的可靠性,并支持劑量設(shè)計(jì)與臨床轉(zhuǎn)化評(píng)估。
在實(shí)驗(yàn)實(shí)施層面,藥明康德通過優(yōu)化樣品處理流程與分析方法,解決多肽易吸附、穩(wěn)定性不足及低暴露檢測(cè)難度高等常見技術(shù)挑戰(zhàn),從而確保關(guān)鍵數(shù)據(jù)的準(zhǔn)確性與可重復(fù)性。依托標(biāo)準(zhǔn)化研究流程與跨學(xué)科協(xié)作模式,該體系能夠在發(fā)現(xiàn)、候選確定及IND前研究階段持續(xù)提供決策支持,幫助研發(fā)團(tuán)隊(duì)在分子設(shè)計(jì)、制劑策略與給藥方案之間實(shí)現(xiàn)協(xié)同優(yōu)化。通過將機(jī)制理解與系統(tǒng)化實(shí)驗(yàn)平臺(tái)相結(jié)合,藥明康德DMPK團(tuán)隊(duì)有效提升多肽藥物DMPK特征的可預(yù)測(cè)性與可開發(fā)性,為下一代多肽創(chuàng)新療法的高效推進(jìn)奠定堅(jiān)實(shí)基礎(chǔ)。
參考資料:
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