Sökning: "25-hydroxyvitamin D"
Visar resultat 1 - 5 av 24 avhandlingar innehållade orden 25-hydroxyvitamin D.
1. Vitamin D deficiency in Northern Sweden : a cross-sectional study of an immigrant population at latitude 63° N, including an open partially randomized, controlled trial studying the effect of supplementation with different doses of cholecalciferol
Sammanfattning : Background: Vitamin D is a prohormone that plays a key role in the calcium and phosphate balance and has physiological functions throughout the entire body. Vitamin D is supplied by exposure to ultraviolet light or by food. The prevalence of vitamin D deficiency in immigrants in Northern Sweden was unknown. LÄS MER
2. Diet and common neurological disorders: cohort studies on dementia, Parkinson’s disease, and stroke
Sammanfattning : Risk factors for dementia, Parkinson’s disease, and stroke have been widely studied but there are still research gaps concerning the role of diet for the development of these diseases. The overall aim of this thesis was to investigate whether various aspects of diet are associated with common disorders and diseases in the brain. LÄS MER
3. Vitamin D Hydroxylating Enzymes and Analogues in Parathyroid Tumors and Breast Cancer
Sammanfattning : In hyperparathyroidism (HPT) raised serum concentrations of ionized calcium is caused by increased secretion of parathyroid hormone (PTH) by parathyroid tumors. Active vitamin D, 1α,25-dihydroxyvitamin D3, is known to suppress PTH secretion and to reduce proliferation of parathyroid tumor cells. LÄS MER
4. Studies on 4b-hydroxycholesterol, a marker of CYP3A activity, and its association with 25-hydroxyvitamin D
Sammanfattning : Cholesterol is a vital compound that can undergo cytochrome P450 (CYP) mediated conversion into steroid hormones, bile acids and oxysterols. CYP enzymes are present in all human tissues and mediate the metabolism of several endogenous and exogenous compounds such as steroids and drugs. LÄS MER
5. Vitamin D and its receptor in parathyroid tumors
Sammanfattning : Correa, P. 2002. Vitamin D and its receptor in parathyroid tumors. Acta Universitatis Upsaliensis. LÄS MER