Platelet Ca(2+) homeostasis is controlled by a multi-Ca(2+)ATPase system including two PMCA (plasma membrane Ca(2+)ATPase) and seven SERCA (sarco/endoplasmic reticulum Ca(2+)ATPase) isoforms. Previous studies have shown similar platelet Ca(2+) abnormalities in diabetic and hypertensive patients, including an increase in intracellular [Ca(2+)](I), a possible modulation of PMCA activity and increased PMCA tyrosine phosphorylation. Very recently, we found that platelets from diabetic patients also exhibited increased PMCA4b expression. In the present study we looked for further similarities between diabetic and hypertensive patients. We first confirmed a decrease in Ca(2+)ATPase activity (mean 55 + 7%) in mixed platelet membranes isolated from 10 patients with hypertension compared with those from 10 healthy controls. In addition, the decreased Ca(2+)ATPase activity correlated with the DBP of the different patients, as expected for PMCA activity. Second, we performed a pilot study of six hypertensives to examine their expressions of PMCA and SERCA mRNA and proteins. Like the diabetic patients, 100% of hypertensives were found to present a major increase in PMCA4b expression (mean value of 218 +/- 21%). We thus determined that platelets from diabetic and hypertensive patients showed similar increased PMCA4b isoform. Since increased PMCA4b expression was recently found to be associated with a perturbation of megakaryocytopoiesis, these findings may also point to an abnormality in platelet maturation in hypertension.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1080/09537100701501646 | DOI Listing |
Dis Mon
January 2025
Division of Nephrology, Texas A&M University College of Medicine in Dallas, Dallas, TX 75246, USA.
Diabetic kidney disease is a leading cause of kidney failure worldwide and is easily detectable with screening examination. Diabetes causes hyperfiltration and activation of the renin-angiotensin aldosterone system by hemodynamic changes within the nephron, which perpetuates damaging physiology. Diagnosis is often clinical after detection of heavy proteinuria in a patient with diabetes,but can be confirmed by observation of histologic stages on kidney biopsy.
View Article and Find Full Text PDFSurg Obes Relat Dis
December 2024
General Surgery Department, Bariatric Surgery Program, Hospital Privado Universitario de Córdoba, Córdoba, Argentina.
Background: Women represent 40% of patients undergoing bariatric surgery. This highlights the importance of understanding its effects on pregnancy and newborns (NBs).
Objective: To compare pregnancy and neonatal outcomes between a group of pregnant women with obesity and those who had prior bariatric surgery.
J Mol Cell Cardiol
December 2024
Department of Physiology and Pathophysiology, Rady College of Medicine, Max Rady Faculty of Health Sciences, University of Manitoba, The Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, Manitoba, Canada. Electronic address:
Cardiovascular disease (CVD) is the leading cause of death for women worldwide. One of the risk factors for CVD in women is complications during pregnancy. Pregnancy complications include a wide arena of pathologies, including hypertension, preeclampsia, gestational diabetes, preterm delivery and miscarriage.
View Article and Find Full Text PDFBMJ Case Rep
January 2025
SUT Hospital, Thiruvananthapuram, Kerala, India.
This case report describes an adult man in his 50s with a history of type 2 diabetes and previously well-controlled hypertension, who presented with uncontrolled hypertension, muscle weakness and fatigue. Biochemical testing revealed hypokalaemia. There was no evidence of renal/renovascular disease.
View Article and Find Full Text PDFInt J Hyg Environ Health
January 2025
National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan; Environmental and Occupational Medicine, College of Medicine, National Taiwan University (NTU) and NTU Hospital, Taipei, Taiwan; Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taipei, Taiwan. Electronic address:
Adverse effects on the respiratory system were associated with intensive petroleum-related industrial activities. The study aimed to assess the impact of petrochemical exposure on childhood asthma using various surrogate indices. A singleton birth cohort from 2004 to 2017 was conducted, leveraging two linked nationwide databases in Taiwan.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!