Perivascular adipose tissue (PVAT) refers to the local aggregate of adipose tissue surrounding the vascular tree, exhibiting phenotypes from white to brown and beige adipocytes. Although PVAT has long been regarded as simply a structural unit providing mechanical support to vasculature, it is now gaining reputation as an integral endocrine/paracrine component, in addition to the well-established modulator endothelium, in regulating vascular tone. Since the discovery of anti-contractile effect of PVAT in 1991, the use of multiple rodent models of reduced amounts of PVAT has revealed its regulatory role in vascular remodeling and cardiovascular implications, including atherosclerosis. PVAT does not only release PVAT-derived relaxing factors (PVRFs) to activate multiple subsets of endothelial and vascular smooth muscle potassium channels and anti-inflammatory signals in the vasculature, but it does also provide an interface for neuron-adipocyte interactions in the vascular wall to regulate arterial vascular tone. In this review, we outline our current understanding towards PVAT and attempt to provide hints about future studies that can sharpen the therapeutic potential of PVAT against cardiovascular diseases and their complications.

Endophytes, which are receiving increasing attention, have been found to be potential sources of bioactive metabolites following the discovery of paclitaxel producing endophytic fungi. In the present study, a total of 348 endophytes were isolated from different parts of 24 Malaysian medicinal plants. Three selected endophytes (HAB10R12, HAB11R3 and HAB21F25) were investigated for their antimicrobial and cytotoxic activities. For antimicrobial activity, HAB10R12 and HAB11R3 were found to be most active against bacteria and fungi, respectively. Their antimicrobial effects were comparable to, if not better than, a number of current commercial antibacterial and antifungal agents. Both HAB10R12 and HAB21F25 were found to be potential anticancer drug candidates, having potent activity against MCF-7 and HCT116 cell lines and warrant further investigation.

These data show, for the first time, expression of sensory nerves within PVAT and that PVAT is crucial for sensory neurogenic vasorelaxation and crosstalk with adipocytes leading to leptin release, which may augment CGRP-mediated relaxation; leptin release is abolished after exposure to conditions of reduced oxygenation.

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Malaria is a life-threatening disease which has claimed many lives. Giemsa's stain is the gold standard method in malaria diagnosis. Generally, Giemsa's stain is diluted with buffered water. However, sometimes, it produces poor staining of the blood smears, in which can create a major challenge in detecting and identifying positive malaria parasites in a peripheral blood smear. This can lead to misdiagnosis and mistreatment to a patient. The present study examined the effect of replacing the buffered water to distilled water during the preparation of 3% Giemsa's solution. Blood specimens were collected from selected positive (n=80) and negative (n=300) malaria cases in EDTA tube. The modified method employed distilled water and different concentrations of buffered water for diluting Giemsa’s solution stock. The microscopy observation was performed on each set of blood film stained by both modified and standard Giemsa staining methods by two WHO’s qualified technicians. All Giemsa solutions with different diluents were comparable in detecting malaria parasites in the blood films. There was no difference between distilled water and different concentrations of buffered water. Furthermore, distilled water produced homogeneous staining and clearer background of the blood films, which enables different species of malaria to be identified. The present study demonstrates that the modified staining using distilled water in malaria parasites identification is comparable to the gold standard method. In addition, the modified method is rapid, easily available, cost-effective, and reliable.