近期,全球多肽和寡核苷酸(TIDES)領(lǐng)域迎來系列進展。加拿大衛(wèi)生部授予諾和諾德(Novo Nordisk)Wegovy(司美格魯肽注射液)附條件上市許可,用于治療伴有中度至重度肝纖維化(F2–F3期)的非肝硬化性代謝功能障礙相關(guān)脂肪性肝炎(MASH)成人患者。信達生物公布了其胰高血糖素(GCG)/胰高血糖素樣肽-1(GLP-1)雙受體激動劑瑪仕度肽注射液的3項臨床試驗的積極結(jié)果,針對2型糖尿病和青少年肥胖。本文節(jié)選其中部分重要進展做簡單介紹,僅供讀者參閱。
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司美格魯肽:在加拿大獲批上市
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諾和諾德公司宣布,加拿大衛(wèi)生部已授予Wegovy(司美格魯肽注射液)附條件上市許可,用于治療伴有中度至重度肝纖維化(F2–F3期)的非肝硬化性MASH成人患者。司美格魯肽此次在加拿大獲批新適應(yīng)癥,是基于其在3期ESSENCE臨床試驗中所展現(xiàn)出的可接受的安全性以及令人鼓舞的療效。研究結(jié)果顯示,與安慰劑組相比,司美格魯肽組患者的脂肪性肝炎(肝損傷)和肝纖維化(肝瘢痕)均獲得了顯著改善。
瑪仕度肽:公布3項臨床試驗數(shù)據(jù)
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信達生物公布了其GCG/GLP-1雙受體激動劑瑪仕度肽注射液在學(xué)術(shù)期刊《自然》上發(fā)表的兩項3期臨床研究的積極結(jié)果。這兩項臨床研究分別在中國2型糖尿病參與者中驗證了瑪仕度肽作為單藥治療(DREAMS-1)和聯(lián)合口服降糖藥治療(DREAMS-2)的療效和安全性。
DREAMS-1研究中,第24周時瑪仕度肽6 mg組的糖化血紅蛋白(HbA1c)較基線顯著降低2.02%,血糖達標率(HbA1c<7%)達81.8%,遠高于安慰劑組的11.7%;體重平均較基線下降7.34%,64.0%患者減重≥5%,而安慰劑組僅6.6%。DREAMS-2研究中,第28周時瑪仕度肽6 mg組的HbA1c降幅達1.66%,血糖達標率為70.4%,度拉糖肽1.5 mg組為61.6%;體重較基線平均下降8.53%,73.1%患者減重≥5%,高于度拉糖肽組的26.6%。此外,兩項研究均顯示瑪仕度肽在空腹血糖、七點指尖血糖、腰圍、血壓、血脂、肝酶等指標上展現(xiàn)出顯著且有臨床意義的改善。安全性方面,兩項研究均顯示瑪仕度肽耐受性良好,整體安全性特征與瑪仕度肽既往臨床研究一致,未發(fā)現(xiàn)新增安全性信號。
信達生物還宣布,瑪仕度肽在中國青少年肥胖人群中開展的一項1b期臨床研究達成了主要終點。研究結(jié)果證明,在中國青少年肥胖參與者中,采用劑量遞增方案、通過每周多次皮下注射瑪仕度肽總體安全性和耐受性良好。此外,經(jīng)過12周治療,瑪仕度肽治療組在體重指數(shù)(BMI)和體重兩項關(guān)鍵指標上均觀察到顯著降低。具體而言,與基線相比,4 mg與6 mg瑪仕度肽治療組的BMI分別相對降低8.78%和10.99%,體重分別相對降低7.87%和9.93%,絕對體重降幅分別為7.72 kg與8.65 kg,這些結(jié)果在統(tǒng)計學(xué)上均顯著優(yōu)于安慰劑組。除減重以外,瑪仕度肽組受試者的腰圍、血壓、血脂、血尿酸、轉(zhuǎn)氨酶、糖代謝指標均觀察到明顯下降趨勢,提示瑪仕度肽可為青少年肥胖人群帶來減重和多重代謝獲益。
Faridoxorubicin(AVA6000):公布1b期臨床試驗數(shù)據(jù)
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Avacta Therapeutics公司公布了其主打在研多肽偶聯(lián)藥物faridoxorubicin用于治療唾液腺癌的積極1b期臨床試驗數(shù)據(jù)。結(jié)果顯示,1b期研究的初步數(shù)據(jù)與此前公布的1a期數(shù)據(jù)一致。綜合1a和1b期的30例患者,疾病控制率(DCR)為90%,并觀察到2例經(jīng)確認的部分緩解(腫瘤縮小≥30%)和7例輕微緩解(腫瘤縮小≥10%且<30%)。19名1b期患者中,中位無進展生存期尚未達到。
Faridoxorubicin是Avacta研發(fā)管線中的首個多肽偶聯(lián)藥物,由多柔比星與Avacta專有的pre|CISION多肽偶聯(lián)而成,該多肽可在腫瘤微環(huán)境中由成纖維細胞激活蛋白-α(FAP)特異性切割。FAP在大多數(shù)實體瘤中,與健康組織相比表達水平顯著升高。Avacta的多肽偶聯(lián)藥物利用這一特征在腫瘤微環(huán)境中特異性釋放活性藥物,從而降低系統(tǒng)暴露和毒性,有望為患者提供更好的治療效果。
RAG-18:研究者發(fā)起的臨床試驗完成首例患者給藥
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中美瑞康(Ractigen Therapeutics)宣布,其用于治療杜氏肌營養(yǎng)不良(DMD)的saRNA候選藥物RAG-18的研究者發(fā)起的臨床試驗(IIT)已成功完成首例患者給藥。RAG-18是一款具有潛在“first-in-class”作用機制的雙鏈saRNA藥物,通過RNA激活機制特異性靶向激活肌肉細胞中UTRN基因表達。由
UTRN基因編碼的肌營養(yǎng)不良蛋白(utrophin)在結(jié)構(gòu)和功能上與抗肌萎縮蛋白(dystrophin)相似,它的上調(diào)可以功能 性替代 DMD 肌肉細胞中缺失的抗肌萎縮蛋白,從而治療所有突變類型的DMD和貝克型肌營養(yǎng)不良(BMD)患者。
臨床前研究表明,采用中美瑞康自主開發(fā)的小核酸遞送系統(tǒng)LiCO,RAG-18能夠顯著激活骨骼肌的UTRN表達,減輕DMD模型小鼠的肌肉損傷和改善肌肉功能,顯示出在治療DMD患者方面的潛力。此前,該藥物已成功獲得美國FDA授予的孤兒藥資格和罕見兒科疾病認定。
參考資料:
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