25486-55-9Relevant academic research and scientific papers
Immunomodulating compositions for treatment of immune system disorders
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, (2008/06/13)
The present invention relates to a composition for use as an immunomodulator comprising small molecular weight components of less than 3000 daltons, and having the following properties: a) is extractable from bile of animals; b) is capable of stimulating monocytes and macrophages in vitro and in vivo; c) is capable of modulating tumor necrosis factor production; d) contains no measurable IL-1α, IL-1β, TNF, IL-6, IL-8, IL-4, GM-CSF or IFN-γ; e) has an anti-proliferative effect in a malignant mouse hybridoma cell line; f) shows no cytotoxicity to human peripheral blood mononuclear cells or lymphocytes; and g) is not an endotoxin. The invention also relates to a method of preparing the composition, its use as an immunomodulator, and its use in the treatment of diseases and conditions having an immunological component.
Thermochemical investigation of the oxygenation of vitamin K
Flowers II, Robert A.,Naganathan, Sriram,Dowd, Paul,Arnett, Edward M.,Ham, Seung Wook
, p. 9409 - 9416 (2007/10/02)
Discovery of a new oxygenation reaction of naphthohydroquinone anions makes possible a determination of the heat of reaction (ΔHox) of oxygen with the potassium salt derived from deprotonation of the hydroquinone form of vitamin K. From that value (-33.52 ± 0.60 kcal/mol), the heat of deprotonation of vitamin KH2 (-30.03 ± 1.20 kcal/mol), and the heat of deprotonation of water (-6.05 ± 0.3 kcal/mol), the enthalpy change for converting vitamin KH2 to vitamin K oxide is established to be -57.5 kcal/mol, in reasonable agreement with our previous estimate of -62.4 kcal/mol for the oxygenation of the parent naphthohydroquinone. Indeed, in similar fashion the heat of oxygenation of the parent naphthohydroquinone was determined to be -58.47 kcal/mol, and this permits the assignment of a heat of formation to naphthoquinone epoxide of ΔHf° = -47.6 kcal/mol. Heats of oxygenation and deprotonation of a variety of related phenols and naphthols provide perspective on cation and substitution effects. These data provide strong support for the base strength amplification mechanism for the biological action of vitamin K proposed by two of us (P.D. and S.W.H.).
