L.D. Possani’s research while affiliated with National Autonomous University of Mexico and other places

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Publications (44)


Resúmenes de investigación
  • Article
  • Full-text available

November 2019

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172 Reads

CES Medicina

Jhon A. Gil-Sucerquia

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Claudia Rodriguez

La Asociación Colombiana de Fisiología (COLFISIS) viene trabajando desde hace quince años para fomentar el progreso científico y académico de esta disciplina y por la actualización profesional permanente de sus afiliados. Dentro de sus objetivos se incluyen: promover y apoyar la investigación científica en fisiología y áreas relacionadas, incrementar la divulgación del conocimiento en fisiología, y organizar y convocar reuniones académicas y científicas.En concordancia con estos objetivos, COLFISIS programa cada dos años un congreso, y en esta ocasión presenta su séptima versión. Cada uno de estos siete congresos ha tenido miradas diferentes de la fisiología. Para el año 2019 planteamos el lema “Resolviendo problemas a través de la Fisiología” con la intención de destacar a la investigación y el conocimiento de esta disciplina, como fundamentos para entender y solucionar diferentes problemas del área de la salud y afines.

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Cardiovascular effects of the scorpions Centruroides margaritatus, Centruroides limpidus and Centruroides noxius crude venom

April 2019

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12 Reads

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1 Citation

The FASEB Journal

Scorpions from the Centruroides genus have high toxicity and it is potentially dangerous to humans. In this study we compare the effect of the crude venom of a colombiam scorpion Centruroides margaritatus ( Cm ) with two Mexican Scorpions, Centruroides limpidus ( Cl ) e Centruroides noxius ( Cn ). The venom was injected intravenously in bolus to pentobarbital anesthetized normotensive rats in the doses of 1, 10, 30, 60, 100 e 300 (μg/kg) (n=6/each group). The hemodynamic parameters were evaluted by using a pressure‐volume cateter implanted into the left ventricle (millar pressure‐volume microcatheter) and the direct effect of the venoms on cardiac output, arterial blood pressure, vascular resitsance, ejection fraction, stroke work, maximal and minimal dP/dt and tau. A lead II electrocardiogram was also evaluated. Cm venom injection did not promote significant alterations. Th venom from Cl decreased all hemodynamic parameters such as dP/dt min (dP/dt min ct =−10780±2153; dP/dt min 300 =−5972±2921 (mmHg/s), p<0,05*) and heart rate (FC ct =−403±31; FC 300 =−250±66 (bpm), p<0,05*). The Cn venom significantle decreased the stroke work (TC ct =5957±1509; TC 100 =2611±1583 (mmHg*μL), p<0,05) and all other hemodynamic parameters evaluated. The structural analysis by optical microscopy showed that Cn venom induced lung hemorragy and pulmonary edema. The venom from Cn and Cl induced severe arrhythmias with ventricular extrasystoles and ventricular tachycardia. The venom of Cm is of low toxicity while the venom from Mexican Scorpions such as Cl and especially Cn have severe cardiovascular toxicity. Support or Funding Information CAPES, CNPq and FUNCAP This abstract is from the Experimental Biology 2019 Meeting. There is no full text article associated with this abstract published in The FASEB Journal .










Citations (2)


... Although measurable, it seems that the cardiovascular toxicity of CmV is lower than that observed for venom from other species, even within the Centruroides genus. This may explain why some authors who used very low doses of venom in preliminary assays have misleadingly concluded that CmV has no effect on the cardiovascular system (Ferreira Santos et al., 2019). Our results may help guide future fractionation and final isolation of toxins, as well as the understanding of the mechanisms of the cardiovascular toxicity induced by CmV. ...

Reference:

Centruroides margaritatus scorpion crude venom exerts cardiovascular effects through alpha-1 adrenergic receptors
Cardiovascular effects of the scorpions Centruroides margaritatus, Centruroides limpidus and Centruroides noxius crude venom
  • Citing Article
  • April 2019

The FASEB Journal

... These K V isoforms are directly involved in pathogenesis of some human nervous system diseases such as episodic ataxia (Helbig et al., 2016) or drug-responsive epilepsy (Corbett et al., 2016), and autoimmune disorders such as multiple sclerosis, rheumatoid arthritis, psoriasis, and type I diabetes (Beeton et al., 2006;Wulff et al., 2009). Venom-derived polypeptides with high selectivity to K V 's in this case display significant potential as templates for drug design (Bhavya et al., 2016;de la Vega et al., 2015). ...

Scorpion venoms as a platform for drug development
  • Citing Article
  • January 2015

RSC Drug Discovery Series