View clinical trials related to Rickets.
Filter by:A growing body of evidence suggests that robust postoperative immune function is associated with a lower risk of surgical site infections (SSIs). At the same time, vitamin D is increasingly recognized as a key regulator of the innate and adaptive immune systems. The investigators elected to conduct the current study in patients who will undergo colorectal surgery since these patients are historically at higher risk of developing SSIs and therefore would be ideal for future investigations.
Along with its effects on bone metabolism, vitamin D is an important modulator of the immune system. Experimental studies have shown that the active metabolite of vitamin D [1,25(OH)2D] is able to skew the T cell compartment into a more anti-inflammatory state, with inhibition of Th1 and Th17 cells and promotion of Th2 and T regulatory subsets. In the context of HIV infection, in which Th1 subpopulations are devoted to inhibit viral replication, any alteration of the Th1/Th2 balance would be of concern. The aim of this Randomized Controlled Trial is to test wether oral supplementation with cholecalciferol could be able: 1) to improve vitamin D status and, 2) to play an immunomodulatory role, in vertically HIV-infected children and young adults with hypovitaminosis D.
Calcium (Ca2+) and vitamin D (VitD) play an important role in child health. Aims. The investigators evaluated the daily intake of Ca2+ and VitD in healthy children; and the efficacy of Ca2+ and VitD supplementation. Daily Ca2 + and VitD intake was evaluated in consecutive healthy children through a validated questionnaire. Subjects with a daily Ca2 + and VitD intake < 70% of dietary reference intakes (DRIs) were invited to participate in prospective randomized trial with 2 groups of nutritional intervention: group 1, dietary counseling aiming to optimize daily Ca2+ and VitD intake plus administration of a commercially available Ca2 + and VitD supplementation product (Colecalcium®, Humana, Milan, Italy); group 2, dietary counseling alone. At the enrollment (T0) and after 4 months (T1) serum VitD levels were assessed.
Research Title: Evaluation of airway reactivity, allergy and inflammatory mediators in exhaled breath condensate in vitamin D resistant rickets. Aim: To assess the effect of absence of vitamin D receptors on airway reactivity, allergy and inflammatory mediators in exhaled breath condensate in a prospective study evaluating patients with vitamin D resistant rickets and in healthy controls. Sample size: 40 participants in the two groups. Primary end point: Airway reactivity as assessed by methacholine challenge test. Secondary outcome parameters: All other parameters are the secondary end points.
Rickets, a common nutritional disorder, is usually considered to be due to vitamin D deficiency. However, in the last few decades many studies have shown that in tropical countries, with abundance of sunshine, calcium deficiency may play a more important role in the causation of rickets. Studies from adults in India have also shown that calcium intake of our population is much below the recommended allowance. The calcium deficiency gets compounded by the high level of phytates in the conventional vegetarian diet consumed by the majority of the population. There are few studies on children in India / other Asian countries on assessment of dietary calcium intake. However, recent studies from many nations of the world have also shown a wide spread prevalence of vitamin D deficiency in adolescent and adult population. A study done at our own hospital has shown a high prevalence of vitamin D deficiency in lactating mothers and their infants. Since both Calcium and Vitamin D deficiency are likely to be present in children, it is not clear what plays a more important role in the etiology of rickets in India or other Asian countries. The present study is therefore planned with the following objectives: 1. To study the dietary calcium intake, sun exposure and serum vitamin D levels in children with and without rickets. 2. To compare the role of Calcium Carbonate, Vitamin D and a combination of the two in the treatment of nutritional rickets.
The importance of vitamin D (VitD) in the prevention and treatment of human health conditions has gained increased attention in recent years. As a result, medical providers of all categories are screening clinical VitD status frequently, yet become challenged with how to best advise patients regarding repletion of VitD status, i.e. which form of VitD replacement is most effective. It has been recognized that to achieve significant effects - serum concentrations >30ng/ml (75 nmol/ml) - it is necessary, as well as safe, to recommend substantially higher doses than were previously thought sufficient. These higher doses can be easily achieved orally. This clinical trial aims to compare absorption of three available forms of this fat-soluble vitamin, due to the potential differences in absorption of different preparations. High-quality powdered, chewable and lipid-emulsified VitD are readily available as supplements, yet these have not been systematically compared. This three-arm, randomized clinical trial will compare the difference in serum 25-hydroxycholecalciferol (25-OH)D concentration between the three arms at baseline and after random administration of one of the three VitD preparations for 12-weeks at a dosage of 10,000 IU VitD per day. The investigators hypothesize that the three forms of vitD will result in an equivalent increase in serum 25OHD.
The optimal dose of vitamin D needed to optimize beneficial effects on musculoskeletal outcomes remains to be defined. Equally unclear is the impact of vitamin D on fuel metabolism and insulin sensitivity in human subjects. Thus, the overall objective of this proposal is to test the hypothesis that in ambulatory overweight elderly individuals, vitamin D administration at doses higher than currently recommended will: 1. Have a salutary effect on parameters of glucose and fuel metabolism. It will thus decrease indices of insulin resistance, improve lipid profile, and decrease markers of cardiovascular disease including adipokines, inflammatory cytokines, and markers of cell adhesion. 2. Have a superior effect on indices of mineral and musculoskeletal metabolism, including bone remodeling markers, lean mass, and bone mineral density. We will investigate whether this effect is modulated by entry status of vitaminD and PTH as detailed below
Adequate vitamin D is essential for proper infant growth and development. However, human milk is low in vitamin D, and most infants do not receive recommended supplementation. Our aim is to assess the feasibility of providing adequate vitamin D to breastfed infants through maternal vitamin D supplementation. Forty non-pregnant, lactating women at least 18 years of age with exclusively breastfed infants between the ages of 1 and 6 months will be randomized to receive oral vitamin D as either 5,000 IU daily for 28 days or 150,000 IU as a single dose. Maternal serum calcium, phosphorus, vitamin D and 25(OH)D; maternal urinary calcium; maternal milk vitamin D and 25(OH)D will be measured on days 0, 1, 3, 7, 14, and 28 of the study; and infant serum vitamin D and 25(OH)D will be measured on days 0 and 28.
Experimental and human data suggests that vitamin D could protect against breast cancer. Overweight/obese individuals are at increased risk of low vitamin D levels. Vitamin D may reduce production of fat tissue, thereby reducing weight gain, which would result in lower levels of adipose-derived hormones and other breast cancer risk factors.The purpose of this study is to test the effect of vitamin D supplementation on the response to a weight loss (diet + exercise) intervention and select breast cancer risk factors in overweight and obese postmenopausal women with low blood vitamin D levels.
The purpose of this study is to investigate the efficacy and safety of oral phosphate (Z-521) in subjects with primary hypophosphatemic rickets.