نتایج جستجو برای: vitamin k
تعداد نتایج: 465521 فیلتر نتایج به سال:
Vitamin K ................................................................................................................................... 1 1 Dietary sources and intake ..................................................................................................... 1 2 Physiology and metabolism ...............................................................................................
Passage of a Triton X-100-solubilized microsomal systems in vitro that are used to study these reactions is the warfarin-sensitive NAD(P)H dehydrogenase.
In contrast to other fat-soluble vitamins, dietary vitamin K is rapidly lost to the body resulting in comparatively low tissue stores. Deficiency is kept at bay by the ubiquity of vitamin K in the diet, synthesis by gut microflora in some species, and relatively low vitamin K cofactor requirements for γ-glutamyl carboxylation. However, as shown by fatal neonatal bleeding in mice that lack vitam...
AIMS The ability of oral vitamin K to eliminate all risk of vitamin K deficiency bleeding during the first three months of life was studied. METHODS Babies (n=182,000) in the north of England judged well enough to be offered milk within 12 hours of birth were given 1 mg of phytomenadione (vitamin K(1)) suspended in a medium chain triglyceride oil by mouth at delivery between 1993 and 1998. Th...
Background and purpose: Vitamin K2 is one of the derivatives of vitamin K belonging to fat-soluble vitamins’ family. Other derivatives of vitamin K in the brain must be converted to K2 and this can reflect its importance in the nervous system. There are some evidences on analgesic effects of vitamin K. This study investigated the effects of intrathecal administration of vitamin K2 on pain in th...
Vitamin K deficiency bleeding (VKDB) due to physiologically low vitamin K plasma concentrations is a serious risk for newborn and young infants and can be largely prevented by adequate vitamin K supplementation. The aim of this position paper is to define the condition, describe the prevalence, discuss current prophylaxis practices and outcomes, and to provide recommendations for the prevention...
phylloquinone (vitamin K1) versus menaquinones (vitamins K2), and their relative contribution in meeting the needs for vitamin K, not only for the synthesis of the hepatic coagulation factors but also for the less well understood vitamin K-dependent carboxylation reactions in other tissues such as bone. Largely unanswered questions surround the comparative intermediary metabolism and transport ...
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