PubMed · 13075310
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T BRAKIER. 1953-03-01. [Improper insulinotherapy].. https://pubmed.ncbi.nlm.nih.gov/13075310/
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Cardiovascular disease (CVD) is the primary cause of death in women, and women with type 2 diabetes mellitus are at greater risk of CVD compared with nondiabetic women. The increment in risk attributable to diabetes is greater in women than in men. The extent to which hyperglycemia contributes to heart disease risk has been examined in observational studies and clinical trials, although most included only men or did not analyze sex differences. The probable adverse influence of hyperglycemia is potentially mediated by impaired endothelial function, and/or by other mechanisms. Beyond high blood glucose level, a number of other common risk factors for CVD, including hypertension, dyslipidemia, and cigarette smoking, are seen in women with diabetes and require special attention. Presentation and diagnosis of CVD may differ between women and men, regardless of the presence of diabetes. Recognizing the potential for atypical presentation of CVD in women and the limitations of common diagnostic tools are important in preventing unnecessary delay in initiating proper treatment. Based on what we know today, treatment of CVD should be at least as aggressive in women-and especially in those with diabetes-as it is in men. Future trials should generate specific data on CVD in women, either by design of female-only studies or by subgroup analysis by sex.
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The importance of both insulin resistance and beta cell dysfunction in the pathogenesis of glucose intolerance is widely recognised. Also popular is the concept that beta cell secretory function must be viewed in the context of extant insulin resistance. This For Debate moves from the premise that, whilst insulin action in vivo can be measured directly by a variety of essentially coherent techniques, measurement of beta cell function is more problematic. We therefore concisely survey the principal in vivo techniques that explore the diverse aspects of beta cell function and conclude that: (i) inter-correlation of clinical tests is only modest in non-diabetic subjects and poor in diabetic individuals; (ii) no single clinical test allows beta cell function to be assessed with accuracy and specificity comparable to those of insulin sensitivity; and (iii) short of complex experiments, mathematical modelling is necessary to interpret insulin secretory responses. Next we discuss the hyperbola paradigm used to describe the reciprocal relation of beta cell function to insulin sensitivity and suggest that: (i) insulin responses reflecting the basal beta cell tone are indeed inversely related to insulin action across degrees of glucose intolerance; (ii) modes of beta cell function that selectively reflect the dynamic response to acutely changing glucose concentrations are largely independent of insulin action; and (iii) when measured by experiment or resolved by modelling, quantitatively the most important of these dynamic secretion parameters is the glucose dose-response curve (glucose sensitivity). In fact, glucose excursions following glucose ingestion (i.e. glucose tolerance) are best explained by dynamic parameters of beta cell function.