药学学报

二甲双胍的多效性研究进展

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肖文铉 ¹ , 罗雅丹 ¹ , 陈建国 ¹^,² , 王芳 ¹^,²^,^*

药学学报 | 综述 2021,56(12): 3385-3391

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药学学报 | 综述 2021, 56(12): 3385-3391

二甲双胍的多效性研究进展

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肖文铉¹, 罗雅丹¹, 陈建国¹^,², 王芳¹^,²^,^*

作者信息

1.华中科技大学同济医学院基础医学院药理学系, 湖北武汉 430030

2.药物靶点研究与药效学评价湖北省重点实验室, 湖北武汉 430030

通讯作者:

*王芳, Tel: 86-27-83692601, E-mail: wangfanghust@mail.hust.edu.cn

Progress in the pleiotropic activity of metformin

Wen-xuan XIAO¹, Ya-dan LUO¹, Jian-guo CHEN¹^,², Fang WANG¹^,²^,^*

Affiliations

1. Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

2. Hubei Key Laboratory of Drug Targeting and Pharmacokinetic Evaluation, Wuhan 430030, China

出版时间: 2021-12-12 doi: 10.16438/j.0513-4870.2021-0464

文章导航

摘要

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二甲双胍作为治疗2型糖尿病的一线药物在临床上广泛被使用, 疗效确定且不良反应少。近年研究发现, 二甲双胍除具有显著的降血糖作用外, 还能改善神经精神疾病如焦虑症、阿尔茨海默病等, 并具有心血管保护作用和抗肿瘤效应, 对肠道菌群也具有一定的调节效果。本文针对二甲双胍在神经精神疾病、心血管系统疾病、肿瘤等疾病的治疗和肠道菌群的调节等方面的作用及其机制和存在的问题进行综述。

关键词

二甲双胍 / 精神疾病 / 心血管系统 / 肠道菌群 / 肿瘤

Abstract

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Metformin, as a first-line drug in the treatment of type 2 diabetes, is widely used in clinic with definite efficacy and few adverse reactions. In recent years, other effects besides hypoglycemia have been found, such as a possible therapeutic effect on mental disorders (e.g., anxiety disorder, Alzheimer's disease), cancer, and cardiovascular disease. It also has regulatory effects on intestinal microbiota. The purpose of this review is to summarize the recent investigations of metformin on mental disorders, cardiovascular diseases, cancer, and intestinal microbiota.

Key words

metformin / mental disorder / cardiovascular system / intestinal microbiota / neoplasm

引用本文

肖文铉, 罗雅丹, 陈建国, 王芳. 二甲双胍的多效性研究进展. 药学学报, 2021 , 56 (12) : 3385 -3391 . DOI: 10.16438/j.0513-4870.2021-0464

Wen-xuan XIAO, Ya-dan LUO, Jian-guo CHEN, Fang WANG. Progress in the pleiotropic activity of metformin[J]. Acta Pharmaceutica Sinica, 2021 , 56 (12) : 3385 -3391 . DOI: 10.16438/j.0513-4870.2021-0464

正文

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二甲双胍源于Galega officinalis L., 名称为山羊豆, 该草药含有丰富的胍类化合物。1918年, 二甲双胍被证明可降低血糖^[1], 目前被推荐为治疗2型糖尿病的一线药物^[2]。其主要通过有机阳离子转运蛋白1 (organic cation transporter 1, OCT1) 转运到肝细胞并作用于线粒体^{[3, 4]}, 继而通过腺苷酸活化蛋白激酶[adenosine 5'-monophosphate (AMP)-activated protein kinase, AMPK] 依赖途径和非AMPK依赖途径共同抑制胞内糖异生以调节血糖^[5] (图 1)。

研究发现, 二甲双胍除降低血糖外, 还有其他的药理作用。如二甲双胍对多囊卵巢综合征、糖尿病肾病和妊娠期糖尿病、代谢综合征如非酒精性脂肪性肝病有一定疗效^[6]。二甲双胍靶向衰老(targeting ageing with metformin, TAME) 的研究计划正在进行中, 旨在观察二甲双胍延缓衰老的作用^[7]。近年来, 二甲双胍降低罹患癌症风险和改善癌症预后^{[3, 8]}, 对多种中枢神经系统疾病的改善作用^[9]及对肠道菌群的调节作用受到越来越多的关注。因此, 本文围绕最新发现的二甲双胍药理作用及其机制进行综述。

1 二甲双胍对神经精神疾病的治疗作用

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1.1 二甲双胍对焦虑障碍的治疗作用

焦虑障碍是目前临床上最常见的心境障碍性疾病之一, 目前主要治疗药物为苯二氮䓬类、选择性5-羟色胺再摄取抑制药和选择性5-羟色胺/去甲肾上腺素再摄取抑制药等, 但存在药物依赖性、起效慢等不良反应^[10]。

相关证据表明, 二甲双胍对原发性焦虑有较好的缓解效果。Fan等^[11]在动物实验中发现大鼠腹腔注射二甲双胍(100 mg·kg^-1) 30 min后即可产生快速的抗焦虑作用, 且与地西泮相比, 该作用不产生耐受性和成瘾性, 也不影响正常大鼠的血糖水平。其机制是二甲双胍通过激活海马脑区AMPK, 增加人类叉头框O蛋白3a (forkhead box class O 3a, FOXO3a) 表达, 后者与γ-氨基丁酸A型受体相关蛋白(gamma-aminobutyric acid receptor-associated protein, GABARAP) 启动子结合, 促进GABARAP的表达, 并增加GABARAP与γ-氨基丁酸A型受体(gamma-aminobutyric acid type A receptor, GABA_A receptor) 的结合, 最终使GABA_A受体在细胞膜表达增加, 从而增大微小抑制性突触后电流(miniature inhibitory postsynaptic currents, mIPSCs) 幅度, 提高抑制性突触传递效率来发挥抗焦虑作用。

此外, 二甲双胍对继发性焦虑也有较好的治疗效果。有研究指出脑缺血后焦虑症及抑郁症发病率会增加^[12]。Vicentini等^[13]报道了全脑缺血/再灌注损伤通过增加大脑氧化应激而促进焦虑样行为和抑郁样行为。给予二甲双胍(200 mg·kg^-1) 14天可改善脑缺血大鼠的认知功能、焦虑和抑郁样行为^[14]。同时, Ge等^[15]发现从缺血/再灌注15 min开始给予二甲双胍(200 mg·kg^-1·day^-1) 可减少缺血大鼠海马脑区神经元死亡, 这与二甲双胍促进RAC-α丝氨酸/苏氨酸蛋白激酶(RAC-alpha serine/threonine-protein kinase, AKT1) 和磷脂酰肌醇3-激酶(phosphatidylinositol 3-kinase, PI3K) 蛋白表达, 从而抑制c-Jun氨基端激酶3 (c-Jun N-terminal kinase 3, JNK3) 磷酸化, 阻止胱天蛋白酶-3 (cysteine-requiring aspartate protease 3, caspase-3) 激活, 减少缺血诱导的细胞凋亡, 发挥神经保护作用有关^[16]。

二甲双胍对其他疾病伴发的焦虑症也有治疗作用。如对于伴有焦虑和抑郁的糖尿病患者, 给予二甲双胍在降血糖的同时, 还可有效改善患者焦虑及抑郁表现, 增强其认知功能^[17-21]。对于甲基苯丙胺成瘾患者伴发的焦虑和抑郁情况, 给予二甲双胍有缓解作用^{[17, 22]}; 二甲双胍亦可改善患有多囊卵巢综合征的青春期或成年女性患者的焦虑等情绪障碍^[23], 但其具体机制仍需进一步研究。

1.2 二甲双胍对阿尔茨海默病的治疗作用及争议

流行病学资料显示, 2000~2010年台湾地区2型糖尿病(type 2 diabetes mellitus, T2DM) 或肥胖等代谢性疾病的患者中, 阿尔茨海默病(Alzheimer's disease, AD) 的发病率(11.00%~13.75%) 明显高于正常人(4.17%~6.09%)^{[24, 25]}。Moreno-Gonzalez等^[26]提出胰岛中的胰岛淀粉样多肽和大脑中的β淀粉样蛋白(β-amyloid protein, Aβ) 的错误折叠相互作用, 加速AD和T2DM的发生发展。此外, 胰岛素信号异常、线粒体功能障碍、能量稳态异常^[27]等也可能导致T2DM和AD共患病。

Tu和Wahlqvist等^{[24, 25]}在队列研究中均发现, T2DM患者联合使用磺酰脲类药物与二甲双胍可显著降低AD发生风险率约60%; 在动物实验^{[28, 29]}中发现低剂量二甲双胍(20 mg·kg^-1·day^-1)可降低淀粉样前体蛋白(amyloid precursor protein, APP) 和tau蛋白含量, 改善AD模型小鼠的记忆力, 为二甲双胍用于AD治疗提供实验依据。

但有资料显示, 二甲双胍可能会增加AD的发病风险。Picone等^[30]报道使用50 mmol·L^-1二甲双胍处理LAN5神经母细胞瘤细胞24 h后, 显著增加胞内APP和早老素含量, 使APP切割增加, 进而促进Aβ在细胞内聚集, 形成寡聚物或不溶性斑块或神经纤维缠结^[31]。此外, 二甲双胍可激活核因子κB (nuclear factor kappa-B, NF-κB), 促进APP和早老素基因表达^[30], APP会进入线粒体并阻塞线粒体外膜转位酶40 (translocases of the outer mitochondrial membrane 40, TOM40) 孔, 破坏线粒体氧化还原平衡, 引起线粒体功能障碍^[32]。动物实验中, Picone等^[30]连续使用高剂量二甲双胍(300 mg·kg^-1·day^-1) 7天可显著增加小鼠神经元内APP和早老素信使RNA (messenger RNA, mRNA) 的表达, 进一步表明高剂量二甲双胍可能会增加AD的发病风险。

因此, 目前对于二甲双胍在AD中的作用研究仍存在一定争议, 具体机制尚不明确, 其确切疗效仍有待进一步验证。

2 二甲双胍对心血管疾病的作用

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糖尿病是心血管系统疾病的危险因素之一, 二甲双胍在降低血糖的同时可降低心血管疾病的发生率。Hong等^[33]报道相较于格列吡嗪, 连续服用二甲双胍3年能显著减少心血管事件发生率。最近研究发现^[34-36], 二甲双胍有独立于血糖调节的改善心脏能量效率的作用。其在增加胰岛素抵抗的心力衰竭患者的心肌效率(每搏功/心肌耗氧量) 的同时, 可直接提高对胰岛素敏感性正常的心力衰竭患者的射血分数^[35]。二甲双胍在维持慢性心衰患者每搏功的基础上降低心肌耗氧量, 从而提高心衰患者的心肌效率^[34]。以上均提示二甲双胍对心脏能量效率的改善作用不依赖于血糖和代谢调节。同时, Cittadini等^[35]指出二甲双胍不改变心肌能量底物的循环水平或全身呼吸交换率, 即二甲双胍对底物氧化改变并不是其提高心肌效率的原因, 同时其对左室收缩功能的具体影响也有待进一步研究。因此, 二甲双胍改善心脏能量效率的机制有待进一步研究。

二甲双胍对心衰的治疗效果存在明显的个体差异, 表现出一定的年龄和性别依赖性^[34], 这可能是由于不同年龄和性别的个体激素分泌水平的差异影响二甲双胍的药物代谢动力学, 提示应用二甲双胍时需全面考虑疾病、衰老和损伤状态下的激素水平调节对治疗效果的影响。

值得一提的是, 个体遗传药物代谢动力学的差异也不可忽略。编码二甲双胍膜转运蛋白基因, 即OCT基因和MATE基因的遗传变异, 可能影响二甲双胍的药代动力学, 即随着MATE基因变异数的增加, 二甲双胍药物代谢减慢^[34]。OCT基因和MATE基因等二甲双胍代谢相关基因的突变可能会抑制其对心输出量的改善作用, 减弱二甲双胍对心衰的治疗效果, 表明进一步探索药物遗传学对二甲双胍诱导的心脏效应的影响具有重要的临床意义。

3 二甲双胍对肿瘤的治疗作用

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回顾性研究显示, 二甲双胍可抑制肿瘤的发生和发展, 降低T2DM患者罹患肿瘤风险, 改善肿瘤患者的预后并延长生存期^[37]。相较于常规抗肿瘤治疗, 联合使用二甲双胍治疗体重指数较大的非小细胞肺癌患者, 其生存率更高^[38]。Wang等^[39]指出使用二甲双胍的人群患食管鳞状细胞癌(esophageal squamous cell carcinoma, ESCC) 的风险显著降低, 尤其是在二甲双胍的新近使用者中, ESCC风险降低得更为明显, 提示短期使用二甲双胍的抗肿瘤效果更为明显。二甲双胍亦可和其他药物或疗法合用, 发挥协同抗肿瘤疗效。如二甲双胍与多柔比星联合治疗乳腺癌具有较好的增效减毒作用^[40]; 当二甲双胍联合二氯乙酸靶向和放射治疗可降低线粒体DNA含量, 对儿童胶质瘤有良好的疗效^[41]; 若二甲双胍联合奥沙利铂和光动力疗法可减轻胰腺癌中肿瘤相关成纤维细胞诱导的对吉西他滨靶向治疗耐药作用^[42]; 二甲双胍和新型光敏剂IR780在采用PEG-PCL脂质体包装后进入胃癌组织内, 联合应用808 nm激光照射肿瘤病灶, 产生活性氧, 并释放二甲双胍和IR780, 抑制癌细胞线粒体的电子传递链, 使氧化磷酸化被抑制起到协同抗肿瘤效果^[43]; 同时, 当二甲双胍和间歇性进食诱导的低血糖联合使用时可显著抑制肿瘤生长, 这提示二甲双胍在低糖环境中可具有抗肿瘤作用^[44]。

二甲双胍可能是通过抑制炎症反应、调节机体免疫系统以及直接抑制肿瘤细胞生长来发挥抗肿瘤作用。Morales等^[45]发现二甲双胍激活AMPK抑制巨噬细胞和脂肪细胞等多种细胞中的促炎细胞因子, 如肿瘤坏死因子α (tumor necrosis factor α, TNF-α)、白介素6 (interleukin-6, IL-6)、白介素8 (interleukin-8, IL-8) 和血管内皮生长因子等, 该抑制作用与NF-κB、信号转导及转录激活蛋白3 (signal transducer and activator transcription 3, STAT3) 和缺氧诱导因子1β (hypoxia inducible factor-1β, HIF-1β) 的失活有关^[46]。此外, 二甲双胍增加CD8⁺肿瘤浸润淋巴细胞的数量^[47], 促进CD8⁺记忆T细胞的生成^[48], 并降低调节性T细胞的免疫抑制作用^[49], 进而抑制肿瘤进展和转移^[50]。二甲双胍还可通过AMPK途径阻断肿瘤前表型巨噬细胞M2的极化, 抑制肿瘤进展^[51]。

大多数肿瘤细胞通过糖酵解产生ATP^[52], 而AMPK的沉默可促使肿瘤细胞在有氧条件下更倾向于进行有氧糖酵解(Warburg效应)^[53]。二甲双胍通过激活AMPK, 对抗Warburg效应而抑制肿瘤细胞进行氧化磷酸化, 因此可作为代谢性肿瘤抑制药^[54-56]。此外, 二甲双胍通过激活AMPK, 抑制脂肪合成酶, 如脂肪酸合酶^[57]或乙酰基辅酶A羧化酶^{[58, 59]}来抑制肿瘤细胞的脂质生物合成途径, 从而抑制乳腺癌和结肠癌的发生发展。此外, 二甲双胍激活AMPK也可使哺乳动物雷帕霉素靶蛋白敏感复合体1 (mammalian target of rapamycin complex 1, mTORC1) 受到抑制^[60-63], 从而减少缺氧诱导因子1 (hypoxia inducible factor-1, HIF-1) 和血管内皮生长因子的合成, 使肿瘤细胞从代谢活跃转为能量储存, 起到抑制细胞生长作用^[64]。

4 二甲双胍对肠道菌群的影响

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肠道菌群在心血管疾病、代谢性疾病、消化系统疾病以及肿瘤等疾病的发生发展中发挥关键作用。二甲双胍对上述疾病的治疗作用可能与其对肠道菌群的调节有关。临床试验发现^{[65, 66]}, 糖尿病患者口服二甲双胍后其粪便样本中大肠杆菌含量显著增加, 对胃肠功能有一定的改善作用, 包括改善粪便形态、促进肠胃蠕动、抑制病原菌在肠道内繁殖等方面。Wu等^[65]观察到二甲双胍治疗2型糖尿病时, 用药者胃肠道内双歧杆菌的数量较安慰剂组有所增加。在荟萃分析研究^[67]中发现肠道内乳酸杆菌属、双歧杆菌属数量的增加可改善2型糖尿病患者的高血压并降低血清胆固醇水平。此外, 乳酸杆菌属、双歧杆菌属可促进人巨噬细胞、树突状细胞成熟, 并从多途径调节各种细胞因子的产生以发挥免疫调节作用, 这可能与二甲双胍减少癌前病变发生有关^{[68, 69]}。双歧杆菌和乳酸菌等肠道细菌则能抑制病原菌的生长, 合成人体需要的维生素, 促进人体对矿物质的吸收, 产生醋酸、丙酸、丁酸和乳酸等有机酸刺激肠道蠕动, 促进排便, 防止便秘以及抑制肠道蛋白质的腐败作用、激活免疫系统从而提高抗病能力等方面有着重要作用。

免疫球蛋白A (immunoglobulin A, IgA) 是调节肠道内稳态、缓解炎症发生的关键分子。Luck等^[70]在对肥胖小鼠的治疗中发现, 二甲双胍可提高小鼠体内IgA合成分泌水平, 分泌型IgA能抑制细菌对肠道黏膜的黏附作用、中和毒素、灭活酶和病毒, 同时对革兰阴性杆菌具有特殊的亲和力, 对部分抗原物质具有封闭作用, 并能诱导嗜酸性、嗜碱性粒细胞脱颗粒作用和抗体依赖细胞介导的细胞毒作用。这提示二甲双胍可能是通过增加分泌型IgA水平, 进而提高肠道通透性, 改善肠道黏膜屏障功能以及调节免疫系统功能。

5 小结与展望

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二甲双胍作为治疗2型糖尿病的一线药物, 越来越多的研究发现其降血糖以外的临床应用, 包括二甲双胍对原发性、继发性以及其他疾病伴发的焦虑均有良好的治疗效果; 可有效延缓心衰患者进程, 降低T2DM患者罹患肿瘤风险, 改善肿瘤患者的预后并延长生存期; 调节人体肠道菌群而对多种疾病起到改善作用。但在研究过程中也发现一系列矛盾的结果, 如小剂量和大剂量二甲双胍分别对AD呈现出截然相反的作用效果。因此, 未来仍需深入揭示二甲双胍对AD的作用机制, 通过设计个性化用药方案及合理的临床试验以明确远期预后。

此外, 二甲双胍作用位点涉及多种疾病的交叉通路, 这可能使其在研究多种疾病并发机制及临床治疗中更具研究价值。必须指出的是, 在研究二甲双胍对其他疾病的治疗效果中, 2型糖尿病与这些疾病的关联性是不可忽视的, 这提示利用二甲双胍的多效性可为个体化治疗多种合并症提供新思路。二甲双胍的多效性可能与其可部分激活免疫系统以诱导相关免疫调节有关^[71], 但其对免疫调节的具体机制仍未明确, 能否应用于肿瘤的联合免疫治疗仍需进一步的临床前瞻性研究。但毋庸置疑的是, 在后续研究支持下, 二甲双胍在其他多系统疾病治疗方面定有更广阔的临床前景。

作者贡献: 肖文铉负责文章构思及布局、文献检索、文章撰写、制图和文章修改; 罗雅丹负责文章撰写和文章修改; 陈建国和王芳进行文章的构思、布局和文章修改。

利益冲突: 所有作者均声明无利益冲突。

基金

收起

国家自然科学基金创新研究群体资助项目(81271005)

参考文献

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2021年第56卷第12期

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doi: 10.16438/j.0513-4870.2021-0464

接收时间：2021-03-30
首发时间：2025-12-18
出版时间：2021-12-12

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收稿日期：2021-03-30
修回日期：2021-04-29

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国家自然科学基金创新研究群体资助项目(81271005)

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1.华中科技大学同济医学院基础医学院药理学系, 湖北武汉 430030

2.药物靶点研究与药效学评价湖北省重点实验室, 湖北武汉 430030

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*王芳, Tel: 86-27-83692601, E-mail: wangfanghust@mail.hust.edu.cn

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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