A guide to the management of blood pressure in the diabetic hypertensive patient

Clinical Practice Guidelines for Hypertension: Evaluation of Quality Using the AGREE II Instrument

INTRODUCTION

Hypertension is an important public health challenge. The purpose of clinical practice guidelines (CPGs) is to provide explicit recommendations for clinical practice, reduce inadequate variations, optimize results, minimize risks, and promote cost-effective practice. Therefore, a highly methodological quality development process for CPGs is more likely to yield a CPG that contains relevant and appropriate recommendations.

METHOD

To assess the quality of CPGs for the prevention and treatment of hypertension, a systematic search was performed using the following literature databases: PubMed, Excerpta Medica Database (EMBASE), Web of Science, the National Guideline Clearinghouse (NGC), Chinese National Knowledge Infrastructure (CNKI), Wan fang Data, VIP, and Chinese Biomedical Literature Database (CBM). Then the Appraisal of Guidelines for Research and Evaluation II (AGREE II) instrument was used to assess the quality of the CPGs.

RESULTS

Forty-one CPGs were identified (ten CPGs in Chinese and 31 CPGs in English). The results for the overall recommendation were as follows: strongly recommended (15 %), recommended (29 %), weakly recommended (51 %), and not recommended (5 %). The scores for all domains (mean ± standard deviations) were "scope and purpose" (58.65 ± 12.67 %), "stakeholder involvement" (48.07 ± 11.41 %), "rigor of development" (27.31 ± 12.29 %), "clarity of presentation" (53.89 ± 11.09 %), "applicability" (40.10 ± 13.33 %), and "editorial independence" (38.75 ± 16.43 %). All differences were statistically insignificant for all domains (P > 0.05) according to publication time. CPGs using an evidence-based (EB) method were of a higher quality than non-EBs for all domains, but the differences were significant for the following domains: "Scope and Purpose," "Rigor of Development," "Applicability," and "Editorial Independence" (P < 0.05). The scores for the CPGs developed based on associations and society appeared slightly higher than those developed by individuals. However, the differences were insignificant for all domains (P > 0.05).

CONCLUSION

A more systematic approach for the development and report of these guidelines is recommended. The AGREE II instrument can be a useful tool to improve the quality of guidelines.

Effects of angiotensin II receptor blocker on myocardial endothelial-to-mesenchymal transition in diabetic rats

BACKGROUND

Emerging evidence has indicated that the endothelial-to-mesenchymal transition (EndMT) is a crucial event during early stages of cardiac fibrosis. In the present study, we first investigated the influence of Irbesartan (Irb) on myocardial EndMT in diabetic rats.

METHODS

Diabetic rats were divided into two groups: the diabetic group (DM) and the Irb-treated group (DM+Irb). Wistar-Kyoto rats served as controls. The pathological changes were investigated by microscopy. Immunofluorescence was performed to evaluate the co-expression of CD31 and fibroblast-specific protein 1 (FSP1). FSP1 and α-SMA expressions were detected by RT-PCR and Western blot analysis. EndMT was also studied in human aortic endothelial cells (HAECs) that had been exposed to high glucose (HG) levels.

RESULTS

Increased interstitial fibrosis was detected in the DM group. Double labeling revealed CD31 expression in FSP1-positive cells in the DM group, and this expression was diminished by Irb treatment (P<0.05). In vitro, we found that HG stimulated angiotensin II synthesis in HAECs. When HAECs were exposed to HG, some of the cells acquired a spindle-shaped morphology and demonstrated a loss of CD31 labeling, which was attenuated by Irb treatment. FSP1 and α-SMA mRNA and protein expression levels were markedly upregulated in diabetic rats compared to controls, and their expressions were inhibited by Irb treatment (P<0.05).

CONCLUSION

The results provide the novel insight that an angiotensin II receptor blocker might prevent diabetic cardiomyopathy by abrogating EndMT in diabetic rats.

Current pharmacotherapeutic concepts for the treatment of cardiovascular disease in diabetics

With the growing worldwide obesity epidemic, obesity, type 2 diabetes mellitus and hypertension leading to premature cardiovascular events, are increasingly prevalent. Diabetes mellitus is a significant public health concern and more aggressive management of the condition and its complications, particularly cardiovascular disease, is warranted. Endothelial cell dysfunction is now known to be present at the earliest stages of metabolic syndrome, and insulin resistance and may precede the clinical diagnosis of type 2 diabetes mellitus by several years. The current focus on endothelial cell function as a potential target of pharmacotherapy in the management of cardiovascular disease in diabetics seems warranted, though not all drugs currently prescribed target endothelial cell function equally. In this review, we consider the six classes of drugs currently prescribed for the treatment of hypertension as they impact endothelial cell function and advocate for the development of novel drugs that can repair the endothelium and enhance nitric oxide availability thus preventing future cardiovascular events.