RESUMO
Type 2 diabetes mellitus (T2DM) and metabolic syndrome (MetS) are diseases caused by the interaction of genetic and non-genetic factors. Therefore, the aim of our study was to investigate the association between six common genetic polymorphisms and T2DM and MetS in males. A total of 120 T2DM, 75 MetS, and 120 healthy controls (HC) were included in the study. ACE ID, eNOS 4a/b, ATR1 A1166C, OXTR (A>G), SOD1 +35A/C, CAT-21A/T gene polymorphisms were genotyped by PCR or PCR-RFLP techniques. T2DM was diagnosed at an earlier age compared to MetS (54 vs 55 years old, p=0.0003) and the difference was greater in carriers of the OXTR G allele (54 vs 56 years old, p=0.0002) or both OXTR G and eNOS b alleles (54 vs 56, p=0.00016). The SOD1 AA genotype (O.R.=0.11, p=0.0006) and the presence of both ACE I and OXTR1 A (O.R.=0.39, p=0.0005) alleles revealed to be protective for T2DM. SOD1 AA and AC genotypes were protective factors for triglyceride (p=0.0002 and p=0.0005, respectively) and HDL cholesterol (p=0.0002 and p=0.0004, respectively) levels in T2DM patients. ACE DD was identified more frequently in hypertensive T2DM patients (O.R.=3.77, p=0.0005) and in those who reported drinking alcohol (p=0.0001) comparing to HC and T2DM patients who did not drink alcohol, respectively. We observed that T2DM patients who reported drinking alcohol had an increased frequency of ACE DD and eNOS bb (p<0.0001), or ACE DD and OXTR G (p<0.0001) compared to non-drinkers. No gene polymorphisms were associated with MetS.
RESUMO
The aim of our study was to evaluate the prognostic value of an early predischarge and late symptom-limited exercise tests as opposed to the evidence from the coronary angiographic examination. Twenty patients with an uncomplicated myocardial infarction were studied with an early predischarge exercise test (14-21 days) and a following postdischarge late symptom-limited veloergometric test. All the patients underwent an exercise test designed according to the protocol of the International Health Organization. A coronary angiographic examination was carried out in all the studied patients. Thirteen of the patients were with two positive veloergometric tests and significant stenosis from the selective coronary angiography. Seven of the patients had two negative tests. Two of them did not have significant coronary stenosis from the angiografic assessment. Generally 40% of the patients undergoing late exercise test reached a higher workload. There was no significant difference between the results from an early predischarge and late symptom-limited veloergometric test. A higher physical work load reached during the late exercise test did not show an improved coronary blood flow. Positive early and late exercise tolerance tests proved significant coronary stenosis. A negative exercise test did not exclude significant coronary stenosis.