Ohio University Heritage College of Osteopathic Medicine, Athens, OH, USA.
Department of Endocrinology, Diabetes, and Metabolism, Cleveland Clinic, Cleveland, OH, USA.
J Osteopath Med. 2023 Nov 3;124(3):127-135. doi: 10.1515/jom-2023-0179. eCollection 2024 Mar 1.
Diabetes mellitus (DM) is one of the most prevalent diseases encountered by the primary care physician on a daily basis. Complications associated with DM can include nephropathy, neuropathy, and retinopathy ("microvascular complications"), along with cardiovascular disease (CVD), which can include myocardial infarction (MI) and strokes ("macrovascular complications"). In the 1990s, landmark clinical trials demonstrated that intensive glycemic control can reduce the risk of developing microvascular complications, but reduction in macrovascular complications with intensive glycemic control was not clearly demonstrated. At this point, intensive glycemic control became the standard of care (SOC). In the 2000s, additional trials evaluating the effect of intensive glycemic control in patients with type 2 diabetes mellitus (T2D) and established CVD, or risk factors for CVD, subsequently failed to identify a macrovascular benefit from intensive glycemic control, and one of the trials was terminated early because of an increase in the risk of mortality observed among patients assigned to receive intensive glycemic control. These results led to less strict glycemic targets being recommended in older patients, particularly those with established CVD. In 2007, everything changed after a report surfaced suggesting that rosiglitazone was associated with a significant increase in the risk of MI, as well as an increase in the risk of cardiovascular death that was of borderline significance. As a result, in 2008, the FDA mandated that all new diabetes medications must exclude an unacceptable level of risk for atherosclerotic cardiovascular disease (ASCVD) prior to drug approval, and thus undergo additional cardiovascular safety trials. Accordingly, through these trials, some of the newer agents, particularly sodium-glucose cotransporter-2 inhibitors (SGLT-2i) and glucagon-like peptide-1 receptor agonists (GLP-1RA), were demonstrated to reduce the risk of major adverse cardiovascular events (MACEs), independent of their effect on glycemic control. These findings subsequently led to further trials to evaluate the effects of some of these therapies on the risk of chronic kidney disease (CKD) progression, as well as adverse heart failure-related outcomes. SGLT-2 inhibitors have been demonstrated to reduce the risk of CKD progression, as well as a reduction in the risk of cardiovascular death or hospitalization secondary to heart failure in patients with both reduced ejection and preserved ejection fractions. A trial evaluating the effects of GLP-1RA on CKD outcomes is ongoing. The aim of this narrative review article, compiled by identifying relevant studies via the utilization of PubMed, is to provide a broad overview over the various clinical trials and analyses that have led to current diabetes management guidelines, and ultimately, help guide primary care physicians in selecting therapies that will not only improve glycemic control and reduce the risk of microvascular complications, but also reduce the risk of macrovascular disease in their patients with T2D.
糖尿病(DM)是初级保健医生日常遇到的最常见疾病之一。与 DM 相关的并发症包括肾病、神经病和视网膜病变(“微血管并发症”),以及心血管疾病(CVD),其中包括心肌梗死(MI)和中风(“大血管并发症”)。20 世纪 90 年代,具有里程碑意义的临床试验表明,强化血糖控制可以降低微血管并发症的风险,但强化血糖控制对大血管并发症的减少并没有得到明确证明。此时,强化血糖控制成为了标准治疗(SOC)。在 21 世纪 00 年代,评估强化血糖控制对 2 型糖尿病(T2D)和已确诊 CVD 或 CVD 危险因素患者的影响的其他试验随后未能确定强化血糖控制对大血管疾病的益处,其中一项试验因接受强化血糖控制的患者死亡率增加而提前终止。这些结果导致对年龄较大的患者,特别是那些已确诊 CVD 的患者,推荐的血糖目标不那么严格。2007 年,一份报告浮出水面,表明罗格列酮与 MI 风险显著增加以及心血管死亡风险增加有关,尽管后者具有边缘意义。因此,2008 年,FDA 规定所有新的糖尿病药物在获得批准之前,必须排除对动脉粥样硬化性心血管疾病(ASCVD)不可接受的风险,因此需要进行额外的心血管安全性试验。因此,通过这些试验,一些较新的药物,特别是钠-葡萄糖共转运蛋白-2 抑制剂(SGLT-2i)和胰高血糖素样肽-1 受体激动剂(GLP-1RA),被证明可以降低主要不良心血管事件(MACEs)的风险,而与血糖控制无关。这些发现随后促使进一步的试验评估这些疗法对慢性肾病(CKD)进展风险以及心力衰竭相关不良结局的影响。SGLT-2 抑制剂已被证明可降低 CKD 进展风险以及射血分数降低和射血分数保留心力衰竭患者因心力衰竭而导致的心血管死亡或住院风险。一项评估 GLP-1RA 对 CKD 结局影响的试验正在进行中。本文通过利用 PubMed 识别相关研究,旨在提供对导致当前糖尿病管理指南的各种临床试验和分析的广泛概述,最终帮助初级保健医生选择不仅可以改善血糖控制和降低微血管并发症风险的治疗方法,而且还可以降低其 T2D 患者的大血管疾病风险。