Metabolomic studies have demonstrated the existence of biological signatures in blood of patients with arterial hypertension, but no study has hitherto reported the sexual dimorphism of these signatures. We compared the plasma metabolomic profiles of 28 individuals (13 women and 15 men) with essential arterial hypertension with those of a healthy control group (18 women and 18 men), using targeted metabolomics. Among the 188 metabolites explored, 152 were accurately measured. Supervised OPLS-DA (orthogonal partial least squares-discriminant analysis) showed good predictive performance for hypertension in both sexes (Q 2 cum = 0.59 in women and 0.60 in men) with low risk of overfitting (pvalue-CV ANOVA = 0.004 in women and men). Seventy-five and 65 discriminant metabolites with a VIP (variable importance for the projection) greater than 1 were evidenced in women and men, respectively. Both sexes showed a considerable increase in phosphatidylcholines, a decrease in C16:0 with an increase in C28:1 lysophosphatidylcholines, an increase in sphingomyelins, as well as an increase of symmetric dimethylarginine (SDMA), acetyl-ornithine and hydroxyproline. Twenty-nine metabolites, involved in phospholipidic and cardiac remodeling, arginine/nitric oxide pathway and antihypertensive and insulin resistance mechanisms, discriminated the metabolic sexual dimorphism of hypertension. Our results highlight the importance of sexual dimorphism in arterial hypertension.

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The aim of this study is to describe the difficulties related to problems of supply and use of antivenom serum (SAV) in the district of Bamako. A retrospective study over a span of five years (January 1998-December 2002) and an interview with the staff of various facilities were conducted. The study included 2 wholesalers of pharmaceuticals, 20 private pharmacies, and 2 hospital pharmacies as they were involved in antivenom trades. A market-driving ability survey of driving practice was conducted in 37 community health centers (CHCs) and 4 dispensaries because they performed antivenom treatments during the study period. A total of 3,318 doses of antivenom were bought, including 84.4% by the People Pharmacy of Mali (PPM), a public organization, and 15.6% by Laborex, a private company. These were out of stock in 1999. Three kinds of SAV were ordered: the polyvalent IPSER Africa (1,200 vials or 36.2%), FAV Africa (318 vials or 9.6%), and Sii anti-snake venom polyvalent serum (1,800 vials or 54.2%). Orders from PPM involved IPSER Africa (Pasteur Mérieux Serum & Vaccines) and Sii anti-snake venom polyvalent serum (Serum Institute of India), and those from Laborex involved IPSER Africa and FAVAfrica (Aventis Pasteur). Onehalf of private pharmacies (54.3%) had made at least one order of SAV. The PPM lost 50% of 2,000 vials of SAV in 1996 due to the expiration of vials that were bought. Private pharmacies lost 3.6% of stocks due to expiration. Prices varied depending on the type of service and the point of sale. Costs of vials were 19,440-35,000 CFA francs (29.6-53.4 euros) for Sii antivenom and 50,200-63,000 CFA francs (76.5-96.1 euros) for FAV Africa antivenom. In CHCs, 59.5% of prescribers were unaware of the indications and methods of proper administration of the SAV, 32.3% ignored the existence of SAV, and 30.9% were skeptical about its effectiveness in treatment of envenomation by snakebite.

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