ABSTRACT
Nutrition is one of the most important modifiable factors involved in the development and maintenance of good bone health. Calcium and Vitamin D have confirmed and established roles in the maintenance of proper bone health. However, other nutritional factors could also be implicated. This review will explore the emerging evidence of the supporting role of certain B Vitamins as modifiable factors associated with bone health. Individuals with high levels of homocysteine (hcy) exhibit reduced bone mineral density (BMD), alteration in microarchitecture and increased bone fragility. The pathophysiology caused by high serum homocysteine is not completely clear regarding fractures, but it may involve factors, such as bone mineral density, bone turnover, bone blood flow and collagen cross-linking. It is uncertain whether supplementation with B Vitamins, such as folate, Vitamin B1, and Vitamin B6, could decrease hip fracture incidence, but the results of further clinical trials should be awaited before a conclusion is drawn.
Subject(s)
Bone and Bones/drug effects , Homocysteine/blood , Vitamin B Complex/blood , Bone Density/drug effects , Bone Remodeling/drug effects , Bone and Bones/metabolism , Calcium, Dietary/administration & dosage , Calcium, Dietary/blood , Folic Acid/administration & dosage , Folic Acid/blood , Hip Fractures/blood , Hip Fractures/epidemiology , Homocysteine/adverse effects , Humans , Incidence , Randomized Controlled Trials as Topic , Risk Factors , Thiamine/administration & dosage , Thiamine/blood , Vitamin B 6/administration & dosage , Vitamin B 6/blood , Vitamin B Complex/administration & dosage , Vitamin D/administration & dosage , Vitamin D/bloodABSTRACT
Diencephalic syndrome (DS) is a rare but rapidly fatal condition, usually occurring during the first year of life, as a result of a hypothalamic/chiasmatic tumor. The purpose of this study was to induce an objective tumor response and to achieve rapid weight recovery by using ten three-day courses of reduced-dose cisplatin-etoposide. Between 2004 and 2009, eight pediatric patients with DS as a result of an hypothalamic tumor and with a median age at diagnosis of 6.5 months (range 4-60 months) received 10 monthly courses of cisplatin (25 mg/m(2)/day on days 1-3) and etoposide (100 mg/m(2)/day on days 1-3). Under chemotherapy, rapid weight recovery was observed for all patients; tumor response was observed for six (75 %; partial response in four and minimum response in two). The other two had stable disease at completion of treatment. Mean time to weight recovery was 6 months (range 5-7 months) for pilomyxoid astrocytoma patients, and 3.3 months (range 3-4 months) for those with pilocytic astrocytoma. For DS patients who received nutritional support (enteral or parenteral nutrition) the mean time for weight recovery was 5 months (range 3-7 months) whereas children who were able to orally ingest a high-energy diet had a mean time for weight recovery of 8.66 months (range 3-19 months). After follow-up ranging from 22 to 89 months (median 38 months) all patients are alive. A low-dose cisplatin-etoposide regimen is highly effective regarding tumor response and treatment of DS symptoms/cachexia without causing significant side-effects.
