Effects of Chronic Physical Activity on Glomerular Filtration Rate, Creatinine, and the Markers of Anemia of Kidney Transplantation Patients.

BACKGROUND: The incidence of anemia in kidney transplantation patients (KTPs) is very common and seems to be associated with the reduction in both renal function and physical exercise tolerance. The purpose of the present study was to compare biochemical markers of anemia and renal function of physically active and sedentary KTPs. METHOD: Serum hemoglobin (Hb), hematocrit (Hct), and serum creatinine (used to derive estimated glomerular filtration rate [eGFR]) were obtained from the medical records of 18 KTPs assisted at the Center for Prevention of Kidney Diseases of the Federal University of Maranhao Hospital. The physically active transplant patients (group 1) included 7 men and 2 women, aged 49 ± 14 years who participated for at least 6 months on a supervised physical exercise program (SPEP) (2 to 3 times a week, 90-minute sessions) and the sedentary counterparts (group 2) of 2 men and 7 women, aged 37 ± 15 years. RESULTS: Group 1 presented higher values of Hb (14.2 ± 2.6 vs 10.7 ± 0.6 g/dL; P = .003), Hct (41.6% ± 7.0% vs 32.3% ± 1.4%; P = .004), and eGFR (64.4 ± 19.4 vs 39.3 ± 19.7 mL/min/1.73 m2; P = .015) when compared with group 2. There was a positive and significant correlation between Hb and eGFR (r = 0.528; P = .024), and between Hct and eGFR (r = .509; P = .031). CONCLUSIONS: Our results suggest that regular physical activity seems to improve the biochemical markers of anemia and also the renal function of KTPs, and these patients should be advised to participate in SPEP.

Genetic ACE I/D and ACTN3 R577X polymorphisms and adolescent idiopathic scoliosis.

The etiology of adolescent idiopathic scoliosis remains unknown. Angiotensin-converting enzyme and α-actinin-3 polymorphisms influence the characteristics of muscle fibers. The aim of this study was to examine the association between idiopathic scoliosis and genetic polymorphism of angiotensin-converting enzyme and α-actinin-3. Ninety-seven females with scoliosis, and 137 healthy, age-matched control females were studied. The presence of polymorphisms was determined by PCR. A χ2 test was used to analyze differences, and odds ratios were estimated. The frequencies of ACE genotypes in the scoliotic group were 46.4% DD, 45.4% ID, and 8.2% II, while in the control group they were 40.1% DD, 43.8% ID, and 16.1% II (P = 0.197). The D allele had a frequency of 69.1% in patients with idiopathic scoliosis and 62% in the control group (P = 0.116). The frequencies of ACTN3 genotypes in females with scoliosis were 31.8% RR, 49.4% RX, and 18.8% XX, while in the control group they were 35% RR, 49% RX, and 16% XX (P = 0.810). The frequency of the R allele was 56.4% in the scoliotic group and 59.6% in the control group (P = 0.518). There was no statistically significant association between angiotensin-converting enzyme or α-actinin-3 polymorphisms and the presence of adolescent idiopathic scoliosis in females.

Role of leptin in body temperature regulation and lipid metabolism following splenectomy.

OBJECTIVE: The physiological changes in serum triglycerides and body temperature that are induced by splenectomy are poorly understood. Therefore, the aim of this study was to investigate parameters related to lipid and glucose metabolism, as well as thermoregulation, in splenectomized mice. DESIGN AND METHODS: Splenectomized and sham-operated WT mice (C57Bl/6) and ob/ob mice were randomly divided and treated with a standard or high fat diet, and several metabolic parameters and the body temperature were investigated. RESULTS: Splenectomy induced a significant increase in triglyceride levels regardless of the diet. It was found that the splenectomized WT mice showed greater serum leptin and insulin levels compared with the sham-operated mice. Additionally, the body temperatures of the splenectomized WT mice were greater than the body temperatures of the control animals regardless of diet; this result too was observed without any significant change in the temperature of the splenectomized ob/ob animals. CONCLUSION: The results suggest that splenectomy interferes with serum triglyceride metabolism and body temperature regardless of the fat content in the diet and that leptin is involved in the regulation of body temperature related to splenectomy.