In this study, a new naphthalene-prazosin derivative (compound 5) was synthetized with the objective of evaluating its activity on ischemia/reperfusion injury. The Langendorff technique was used to evaluate the effect of the compound 5 on ischemia/reperfusion injury. Additionally, the mechanism of action involved in the activity exerted by the compound 5 on perfusion pressure and coronary resistance was evaluated by measuring left ventricular pressure in absence or presence of following compounds; prazosin, metoprolol, indomethacin and nifedipine. The results showed that the compound 5 reduced infarct size compared with the control conditions. Other results showed that the compound 5 significantly increases (p = 0.05) the perfusion pressure and coronary resistance in isolated rat heart. In addition, other data indicate that the compound 5 increases left ventricular pressure in a dose-dependent manner (0.001 to 100 nM); however, this phenomenon was significantly inhibited by nifedipine at a dose of 1 nM (p = 0.05) and this effect was independent of cAMP levels. In conclusion, these data suggest that the naphthalene-prazosin derivative exerts a cardio protective effect via the calcium channels activation and consequently induces changes in the left ventricular pressure levels. This phenomenon results in a decrease of * Corresponding author. B. Sarabia-Alcocer et al. 1131 myocardial necrosis after ischemia and reperfusion.

The aim of this study was synthesizing a steroid-oxazole-oxazete derivative (4) to evaluate their biological activity in vitro. The first stage was achieved by the preparation of a steroid-oxazole-1,2′-[1,3]oxazete] derivative using a series of reactions such as; (1) addition; (2) nitration and (3) cyclization. Then, the biological activity of steroid analog against infarct area was evaluated on an ischemia/reperfusion model using quinalizarin as a control. In addition, the interaction of steroid derivative with kinase protein (CK2) was evaluated using a docking model. The results showed a decrease infarct area (0.001 nM] in a similar form that quinalizarin. In addition, the theoretical analysis suggests that steroid derivative could interact with some aminoacid residues (Gln 86 , Lys 96 , Leu 97 , Leu 98) of 3FL5 protein surface. All these data indicate that steroid derivative can decrease the infarct area via CK2 inhibition.

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Background: Obesity is risk factor to development cardiovascular diseases. There are several studies which indicate that fatty acids can exert changes in body fat in children. However, the results found relatively are few and have generally been conducted over short time periods with small sample sizes, making it difficult to draw definitive conclusions.Objective: In this study the effect induced by omega-3 fatty acids on some biological parameters such as glucose, total cholesterol and body mass index levels in obese children were evaluated.Methods: A dietary intake of gummies with omega-3 fatty acids at dose (100-350 mg) was administered to obese children. Then, glucose, total cholesterol and body mass index levels were determinate using an apparatus (accutrend pluss) and enzyme-immunoassay techniques. Results:The results showed that dietary intake of gummies with omega-3 fatty acids induces significantly changes on total cholesterol and body mass index levels in obese girls compared with obese boys. Conclusions:All these data suggest that dietary intakes of omega-3 fatty acids could be used for the treatment of degree of obesity in obese girls. However, it is important to mention that it is also necessary to evaluate the beneficial effect of omega-3 fatty acids on other biological parameters involved in the degree of obesity as well as the possible toxicity involved in its administration.great controversy about the effect exerted by intake dietary of omega-3 fatty acids against obesity. Therefore, in this study the effect produced by omega-3 fatty acids on some factors associated with obesity such as glucose, body mass index, total cholesterol, and blood pressure levels was evaluated on obese children. Material and MethodsFifth and sixth graders (n=300) in two San Francisco de Campeche Mexico schools were invited to participate in a dietary intake gummy with omega-3 fatty acids at dose of 100 to 350 mg. The parents were informed about the nature and the purpose of this study, and a consent form was signed by parents. In addition, the protocol of this research was previously approved by the ethical committee at the University Autonomous of Campeche.

The objective of this investigation was to develop two cyclobutadiene-steroid derivatives (compounds 6 or 7) to evaluate its theoretical interaction on µ, d, and k opioid-receptors. The synthesis of 6 or 7 was carried out using a series of reactions which involves. 1) addition/cyclization: 2) imination, 3) etherification and 4) oxy-functionalization. Chemical structure of all compounds was confirmed using elemental analysis and NMR spectra. In addition, a theoretical analysis on the interaction of compounds 6 or 7 with µ, d, and k opioid-receptors was evaluated using a docking model. The results showed that 6 or 7 may interact with different type of amino acids residues on surface of the µ, d, and k opioid-receptors. Other data, indicated that inhibition constant (Ki) involved in the interaction of compounds 6 or 7 with k receptor was less compared with the Ki present in the interaction with µ, d, receptors. These data indicated that 1) compounds 6 or 7 show a high affinity by k-receptor; 2) the cyclobutadiene analogs are particularly interesting, because these drugs may constitute a novel therapy for pain.

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