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Summary Management guidelines continue to identify metformin as initial pharmacologic antidiabetic therapy of choice for people with type 2 diabetes without contraindications, despite recent randomized trials that have demonstrated significant improvements in cardiovascular outcomes with newer classes of antidiabetic therapies. The purpose of this review is to summarize the current state of knowledge of metformin's therapeutic actions on blood glucose and cardiovascular clinical evidence and to consider the mechanisms that underlie them. The effects of metformin on glycaemia occur mainly in the liver, but metformin‐stimulated glucose disposal by the gut has emerged as an increasingly import site of action of metformin. Additionally, metformin induces increased secretion of GLP‐1 from intestinal L‐cells. Clinical cardiovascular protection with metformin is supported by three randomized outcomes trials (in newly diagnosed and late stage insulin‐treated type 2 diabetes patients) and a wealth of observational data. Initial evidence suggests that cotreatment with metformin may enhance the impact of newer incretin‐based therapies on cardiovascular outcomes, an important observation as metformin can be combined with any other antidiabetic agent. Multiple potential mechanisms support the concept of cardiovascular protection with metformin beyond those provided by reduced blood glucose, including weight loss, improvements in haemostatic function, reduced inflammation, and oxidative stress, and inhibition of key steps in the process of atherosclerosis. Accordingly, metformin remains well placed to support improvements in cardiovascular outcomes, from diagnosis and throughout the course of type 2 diabetes, even in this new age of improved outcomes in type 2 diabetes.

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IntroductionDevelopment of higher standards for diabetes care is a core element of coping with the global diabetes epidemic. Diabetes guidelines are part of the approach to raising standards. The epidemic is greatest in countries with recent rises in income from a low base. The objective of the current study was to investigate the availability and nature of locally produced diabetes guidelines in such countries.MethodsSearches were conducted using Medline, Google, and health ministry and diabetes association websites.ResultsGuidelines were identified in 33 of 75 countries outside North America, western Europe, and Australasia. In 25 of these 33 countries, management strategies for type 1 diabetes were included. National guidelines relied heavily on pre-existing national and international guidelines, with reference to American Diabetes Association standards of medical care and/or other consensus statements by 55%, International Diabetes Federation by 36%, European Association for the Study of Diabetes by 12%, and American Association of Clinical Endocrinologists by 9%. The identified guidelines were generally evidence-based, though there was some use of secondary evidence reviews, including other guidelines, rather than original literature reviews and evidence synthesis. In type 1 diabetes guidelines, the option of different insulin regimens (mostly meal-time + basal or premix regimens) was recommended depending on patient need. Type 2 diabetes guidelines either recommended a glycosylated hemoglobin target of <7.0% (<53 mmol/mol) (70% of guidelines) or <6.5% (<47 mmol/mol) (30% of guidelines) as the ideal glycemic target. Most guidelines recommended a target fasting plasma glucose that fell within the range of 3.8–7.2 mmol/L. Most guidelines also set a 2-h post-prandial glucose target value within the range of 4.0–8.3 mmol/L.ConclusionWhile only a first step in achieving a high quality of disease management, national guidelines of quality and with fair consistency of recommendations are becoming prevalent globally. A further challenge is implementation of guidelines, by integration into local care processes.

Гипогонадизм у мужчин, определяемый как снижение уровня тестостерона в сыворотке крови в сочетании с характерными симптомами и/или признаками (подробно описаны далее), часто встречается при сахарном диабете (СД). Эти рекомендации не охватывают всего диапазона патологий, обусловливающих развитие дефицита тестостерона (гипогонадизма), а фокусиру-ются на его клинических вариантах, характерных для мужчин с диабетом. В рекомендациях представлены данные о распро-страненности гипогонадизма при СД, его этиологии. В разделе «диагностика» подробно представлены особенности анамнеза пациентов с гипогонадизмом при СД, необходимые методы физикального и лабораторного обследования. Отдельно рассмо-трены факторы риска и клинические последствия гипогонадизма. В разделе «выбор методов лечения» представлены возмож-ные варианты лечения таких пациентов с использованием различных средств андрогенной терапии с учетом потребностей мужчины, сохранения его репродуктивной функции и факторов риска. Особое внимание уделено показаниям, противопо-казаниям и факторам риска андрогенной терапии у мужчин с диабетом, особенно в пожилом возрасте. С учетом этого раз-работаны принципы мониторинга проводимого лечения. На основании большого числа исследований продемонстрированы благоприятные эффекты андрогенной заместительной терапии у мужчин с гипогонадизмом и СД. Ключевые слова: гипогонадизм, мужчины, дефицит тестостерона, тестостерон, сахарный диабет, метаболический синдром. Hypogonadism in men, defined as a reduction in serum testosterone in combination with characteristic symptoms and/or signs (described in detail later), is common in diabetes mellitus (DM). These recommendations do not cover the whole range of pathologies that cause the development of testosterone deficiency (hypogonadism), but focus on its clinical variants and characteristic for men with diabetes. The recommendations provide data on the prevalence of hypogonadism in diabetes, its etiology. In the section "diagnostics" the features of anamnesis of patients with hypogonadism with diabetes, the necessary methods of physical and laboratory examination are presented in detail. The risk factors and clinical consequences of hypogonadism are separately examined. In the section "choice of treatment methods", there are possible treatment options for such patients using various androgenic therapies, taking into account the needs of the man, maintaining his reproductive function and risk factors. Particular attention is paid to indications, contraindications and risk factors for androgen therapy in men with diabetes, especially in old age. With this in mind, principles for monitoring the treatment are developed. Based on a large number of studies, favorable effects of androgen replacement therapy in men with hypogonadism and diabetes have been demonstrated. Guidelines for the Diagnosis and Treatment of testosterone deficiency (hypogonadism) in male patients with diabetes mellitus