Antithrombotic Study and Identification of Metabolites in Leaf Extracts of Chaya [Cnidoscolus aconitifolius (Mill.) I.M. Johnst.].

In Mexico, Cnidoscolus aconitifolius (chaya) has been used to treat cardiovascular diseases (CVD). Because CVD are the number one cause of mortality, chaya use has become a health strategy. The aim of this study was to evaluate the antithrombotic activity and identify the metabolites in the most active extract. Aqueous (Aq), ethanolic (EtOH), acetonic (An), ethyl acetate (AcOEt), diethyl ether (Et2O), and hexanic (Hx) extracts were obtained. Platelet aggregation, phospholipase A2, prothrombin time (PT), activated partial thromboplastin time (aPTT), and clot lysis were evaluated. Metabolites were identified by gas chromatography-mass spectrometry (GC-MS). EtOH showed the greatest inhibition of platelet aggregation and phospholipase A2. Ac had the greatest effect on PT and aPTT. AcOEt had the greatest effect on clot lysis. EtOH, with the highest potential, was analyzed by GC-MS; fatty acids and triterpenes were identified. Thus, EtOH showed greater antiplatelet activity and other extracts showed moderate activity. This is a preliminary antithrombotic study. Future research will allow the development of nutraceuticals or functional ingredients for the prevention and treatment of thrombosis.

[Acceptability of a test for antibodies against HIV in a group of pregnant women in Yucatan, Mexico]. / Aceptabilidad para la detección de anticuerpos contra el VIH en un grupo de mujeres embarazadas de Yucatán, México.

OBJECTIVE: To evaluate the acceptability of a test for antibodies against HIV (Ab-HIV) in a group of pregnant women in Yucatan, Mexico. PATIENTS AND METHODS: A clinical and epidemiological study was carried out on 310 pregnant women at different health centers in Yucatan Mexico, from January 2000 to March 2001. A questionnaire was applied to determine information in relation to HIV infection and acceptability of the test. Prior counselling was given to all those who accepted being tested. RESULTS: The median age was 24 (range 14 to 42). A 64.5% had a basic education, 91.6% were homemakers; 38% of the sexual partners worked away from home; 15% said they had more than one sexual partner; 31% had leukorrhea at the time of testing and 69% at some time in the past. Ninety percent of the women accepted being tested for HIV and all of them showed negative results. CONCLUSION: The acceptability of the test was similar to that reported in the international literature. The cost benefits of such a test must be considered, but always within the values of prevailing normative and respect of human rights of women. Despite zero prevalence, we found factors favourable for HIV infection.