Hypotensive effect and endothelium-dependent vascular action of leaves of Alpinia purpurata (Vieill) K. Schum

The aims of this study were to evaluate the chemical profile, vascular reactivity, and acute hypotensive effect (AHE) of the ethanolic extract of leaves of Alpinia purpurata (Vieill) K. Schum (EEAP). Its chemical profile was evaluated using HPLC-UV, ICP-OES, and colorimetric quantification of total flavonoids and polyphenols. The vascular reactivity of the extract was determined using the mesenteric bed isolated from WKY. AHE dose-response curves were obtained for both EEAP and inorganic material isolated from AP (IAP) in WKY and SHR animals. Cytotoxic and mutagenic safety levels were determined by the micronucleus test. Rutin-like flavonoids were quantified in the EEAP (1.8 ± 0.03%), and the total flavonoid and polyphenol ratios were 4.1 ± 1.8% and 5.1 ± 0.3%, respectively. We observed that the vasodilation action of EEAP was partially mediated by nitric oxide (·NO). The IAP showed the presence of calcium (137.76 ± 4.08 μg mg-1). The EEAP and IAP showed an AHE in WKY and SHR animals. EEAP did not have cytotoxic effects or cause chromosomic alterations. The AHE shown by EEAP could result from its endothelium-dependent vascular action. Rutin-like flavonoids, among other polyphenols, could contribute to these biological activities, and the calcium present in EEAP could act in a synergistic way

Ambulatory haemorrhoidal surgery: systematic literature review and qualitative analysis

International audiencePurposeThe aims of this study are to review the advantages and drawbacks of the ambulatory management of patients scheduled for haemorrhoidal surgery and to highlight the reasons for unplanned hospital admission and suggest preventive strategies.MethodsWe conducted a systematic review of the literature from January 1999 to January 2013 using MEDLINE and EMBASE databases. Manuscripts were specifically analysed for failure and side effects of haemorrhoidal surgery in ambulatory settings.ResultsFifty relevant studies (6082 patients) were retrieved from the literature review. The rate of ambulatory management failure ranged between 0 and 61 %. The main reasons for failure were urinary retention, postoperative haemorrhage and unsatisfactory pain control. Spinal anaesthesia was associated with the highest rates of urinary retention. Doppler-guided haemorrhoidal artery ligation has less frequent side effects susceptible to impair ambulatory management than haemorrhoidectomy and stapled haemorrhoidopexy. However, the fact that haemorrhoidopexy is less painful than haemorrhoidectomy may allow ambulatory management.ConclusionDay-case haemorrhoidal surgery can be performed whatever the surgical procedure. Postoperative pain deserves special prevention measures after haemorrhoidectomy, especially by using perineal block or infiltrations. Urinary retention is a common issue that can be responsible for failure; it requires a preventive strategy including short duration spinal anaesthesia. Doppler-guided haemorrhoidal artery ligation is easy to perform in outpatients but deserves more complete evaluation in this setting

Characterization and Quantification of Polyphenolic Compounds from Adenium Obesum Leaves

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In Vitro Anti-Inflammatory and Immunomodulatory Activities of an Extract from the Roots of Bupleurum rotundifolium

This article belongs to the Special Issue Biological Potential and Medical Use of Natural ExtractsInternational audienceBackground: Some Bupleurum species, such as the Bupleurum chinense DC. or the Bupleurum scorzonerifolium Willd have been extensively studied (especially their roots) for the treatment of inflammation. In contrast, only compounds extracted from the aerial parts of Bupleurum rotundifolium have been studied and showed anti-inflammatory or antiproliferative activities. This study was conducted to investigate the antioxidant, anti-inflammatory, and immunomodulatory effects of Bupleurum rotundifolium roots. Methods: To tackle the various aspects of inflammation, we studied in vitro a methanolic extract from the roots of Bupleurum rotundifolium on peripheral blood mononuclear cells (PBMCs), polymorphonuclear neutrophils (PMNs), and the monocytic cells THP-1. Its antioxidant capacities and iron-chelating activity were assessed. The extract was tested on THP-1 differentiation, reactive oxygen species (ROS) production by leukocytes, neutrophils chemotaxis, cytokines, PGE2 production, and NF-κB activation in PBMCs. Results: The extract showed a decreased ROS production in stimulated cells. It increased PBMC chemokine secretion and up-regulated the differentiation of THP-1 monocytes into macrophage-like cells, indicating a potential interest of the extract in the resolution of acute inflammation. In addition, the analysis of cytokine production suggests that Bupleurum rotundifolium has immunomodulatory properties. Conclusions: Cytokines secretion, especially IL-1β and IL-12p70, provided us with a set of indicators suggesting that the extract might be able to drive the polarization of macrophages and lymphocytes toward a Th2 anti-inflammatory profile in excessive inflammation