Henry Cardona

University of Antioquia, Santa Fe de Antioquia, Antioquia, Colombia

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Publications (6)8.19 Total impact

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    ABSTRACT: Studies have shown an association between recurrent pregnancy loss and inherited thrombophilia in Caucasian populations, but there is insufficient knowledge concerning triethnic populations such as the Colombian. The aim of this study was to evaluate whether inherited thrombophilia is associated with recurrent pregnancy loss. Methods. We conducted a case-control study of 93 patients with recurrent pregnancy loss (cases) and 206 healthy multiparous women (controls) in a Colombian subpopulation. Three single nucleotide polymorphisms (SNPs) markers of the inherited thrombophilias factor V Leiden, prothrombin G20210A, and methylenetetrahydrofolate reductase C677T were genotyped by PCR-RFLP. Activated protein C resistance and plasma levels of antithrombin, protein C, and protein S were also measured. Results. The frequency of thrombophilia-associated SNPs, activated protein C resistance, and anticoagulant protein deficiencies, was low overall, except for the methylenetetrahydrofolate reductase C677T SNP. The differences between patients and controls had no statistical significance. Conclusion. Our study confirms the low prevalence of inherited thrombophilias in non-Caucasian populations and it is unlikely that the tested thrombophilias play a role in the pathogenesis of recurrent pregnancy loss in this Colombian population.
    Thrombosis. 01/2012; 2012:367823.
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    ABSTRACT: The 20210A allele of the prothrombin gene is associated with increased risk of venous thromboembolism. In this study, we described manifestations of thrombosis in four generations of a Colombian family, with four 20210A homozygous carriers and six 20210G/A heterozygous carriers for polymorphism as well as unrelated participants from the same population. The levels of prothrombin in the 20210A homozygote patients were higher than in the normal 20210G homozygotes (133 + 11% and 92.3 + 12.4%, respectively, P < .01) and the 20210G/A heterozygotes (133 + 11% vs. 114.8 + 24%, P < .05). About 2 out of 4 20210A homozygotes and 5 out of 6 20210G/A heterozygous members of this family did not have venous thromboembolism or any other thrombotic manifestation even though one of them had been exposed to thrombotic risk factors. Thus, we posit the effect of 20210A on the thrombotic phenotype in this family seems to be weak.
    Clinical and Applied Thrombosis/Hemostasis 11/2008; 15(1):113-6. · 1.58 Impact Factor
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    ABSTRACT: The objective of this study was to evaluate if there is any difference in the proportion of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphisms and the homocysteine levels in a group of women with recurrent pregnancy loss (RPL) and a control group. Ninety-three patients with diagnosis of three or more gestational losses and 206 healthy women with two or more children, were included. After acceptance of informed consent, samples of peripheral blood were taken to determine the genetic polymorphisms of MTHFR C677T and the plasmatic levels of homocysteine. The carriers of the homozygous mutation TT of MTHFR 677T polymorphism were 12.9% (12 of 93) in the group of patients and 14.6% (30 of 206) in the control group; 46.2% (43 of 93) and 40% (83 of 206) in the group of patients and controls respectively, were heterozygous CT for MTHFR gene. The levels of homocysteine were 7.2 μmol/ml in the group of patients and 7.7 mmol/l in controls. There was no relationship between MTHFR gene polymorphisms and the increase of homocysteine levels, nor of these one with RPL. From the nutrigenetics perspective we suggest that studies related to MTHFR polymorphisms and the risk of disease include the levels of folate and B6 and B12 vitamins participating in the tetrahydrofolate cycle for trying to establish a direct relation among the genotype, the level of metabolite and the clinical manifestations. In this regard, we recommend the administration of folic acid in women in search of pregnancy due to the high frequency of heterozygous and homozygous for MTHFR C677T mutation in our population.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 06/2008; 23(3):277-282. · 1.31 Impact Factor
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    ABSTRACT: The development of venous thromboembolism is influenced by a variety of genetic and environmental risk factors. A few studies have ascertained whether thrombophilic defects are risk factors for venous thromboembolism in Latin American populations with a variable degree of admixture, such as the Colombian population. To address this issue, we conducted a case-control study involving 100 consecutive patients with deep vein thrombosis and 114 healthy controls from the Hospital Universitario San Vicente de Paúl, Medellín, Colombia. Activated protein C resistance (APC resistance) was detected in 25/99 patients vs. 6/114 controls (OR = 6.08, 95% CI = 2.23-17.47). Ten of 100 patients carried the factor V Leiden mutation vs. 1/114 controls (OR = 12.56, 95% CI = 1.61-267). APC resistance was associated with the factor V Leiden mutation in only 10/25 patients. The prothrombin G20210A mutation was found in 4/100 patients, but none of the controls (P < 0.05). There was no significant difference in the proportion of homozygous carriers of methylenetetrahydrofolate reductase C677T variant among patients and controls. In conclusion, in our studied population, factor V Leiden, APC resistance, and prothrombin G20210A were associated with an increased risk of deep vein thrombosis. However, the frequencies of these thrombophilic defects and of APC resistance associated with factor V Leiden was lower than the corresponding frequencies previously reported for Caucasian populations. Further study is required to assess the influence of ethnicity on thrombophilia.
    American Journal of Hematology 12/2006; 81(12):933-7. · 4.00 Impact Factor
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    Ganado BON contribución a la preservación y propagación del ganado Criollo colombiano. Editado por Ossa JE y Segura JA. Universidad de Antioquia, Medellín, Colombia. 01/2003;
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    ABSTRACT: The objective of this study was to evaluate if there is any difference in the proportion of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphisms and the homocysteine levels in a group of women with recurrent pregnancy loss (RPL) and a control group. Ninety-three patients with diagnosis of three or more gestational losses and 206 healthy women with two or more children, were included. After acceptance of informed consent, samples of peripheral blood were taken to determine the genetic polymorphisms of MTHFR C677T and the plasmatic levels of homocysteine. The carriers of the homozygous mutation TT of MTHFR 677T polymorphism were 12.9% (12 of 93) in the group of patients and 14.6% (30 of 206) in the control group; 46.2% (43 of 93) and 40% (83 of 206) in the group of patients and controls respectively, were heterozygous CT for MTHFR gene. The levels of homocysteine were 7.2 micromol/ml in the group of patients and 7.7 mmol/l in controls. There was no relationship between MTHFR gene polymorphisms and the increase of homocysteine levels, nor of these one with RPL. From the nutrigenetics perspective we suggest that studies related to MTHFR polymorphisms and the risk of disease include the levels of folate and B6 and B12 vitamins participating in the tetrahydrofolate cycle for trying to establish a direct relation among the genotype, the level of metabolite and the clinical manifestations. In this regard, we recommend the administration of folic acid in women in search of pregnancy due to the high frequency of heterozygous and homozygous for MTHFR C677T mutation in our population.
    Nutricion hospitalaria: organo oficial de la Sociedad Espanola de Nutricion Parenteral y Enteral 23(3):277-82. · 1.31 Impact Factor