ABSTRACT
Objective To synthesize 6?-butylaminocholestan-3?,5?-diol,a new analogue of anti-tumoral dendrogenin with a new method.Methods 6?-butylaminocholestan-3?,5?-diol was synthesized in 5 steps using cholesterol as the starting material,3?,5?-dihydroxyl-cholestan-6-one as the key intermediate and imidation-reduction of one-pot 2 steps as the key steps.Results The target compound was synthesized in a total yield of 62% and its structure were consistent with MS (476),HRMS (476.446 5),[?]25D(-57.0?),IR (3387),1HNMR [2.67～2.61 (1H,m,6?-H)],13CNMR spectrum and elemental analyses.Conclusion Our synthetic route to 6?-butylaminocholestan-3?,5?-diol is characterized by easily available and cheap starting material,high total yield and easy industrialization.
ABSTRACT
<p><b>OBJECTIVE</b>To observe the effect of different nutritional routes of giving nutrition on the intestinal mucus barrier in severely scalded rats.</p><p><b>METHODS</b>Wistar rats inflicted with 30% TBSA III degree scalding on the back were employed as the model and were randomly divided into 3 groups, i.e. control (C), parenteral nutrition (PN) and enteral nutrition (EN) groups. The rats in PN and EN groups were supplied with equal amount of nitrogen and calories and with equal volume of nutrition solution. The dynamic changes in the thickness of intestinal mucus layer and the contents of protein, hexose and acetylneuraminate in the mucus were examined.</p><p><b>RESULTS</b>When compared with those in C group, the intestinal mucus layer became thinner and the contents of protein, hexose and acetylneuraminate in the mucus in both PN and EN groups decreased evidently after scalding. When compared between two nutritional groups, the thickness of intestinal mucus layer and the contents of the hexose and acetylneuraminate in the mucus in EN were much thicker and higher than those in PN group, while the mucus protein content exhibited no obvious difference between PN and EN groups.</p><p><b>CONCLUSION</b>It was suggested that intestinal goblet cell synthesized and secreted less mucus after scalding in rats resulting in thinning of intestinal mucus layer and the change in mucus components. When compared with those in PN group, less injury to the intestinal goblet cells occurred and the intestinal mucus synthesis was less affected in EN group, and the components of intestinal mucus were maintained stable.</p>
Subject(s)
Animals , Female , Male , Rats , Burns , Metabolism , Enteral Nutrition , Hexoses , Metabolism , Intestinal Mucosa , Metabolism , Pathology , Parenteral Nutrition , Proteins , Metabolism , Rats, Wistar , Sialic Acids , Metabolism , Time FactorsABSTRACT
OBJECTIVE： To evaluate the clinical therapeutic effect of L-glutamine granules on intestinal damage of severe burn patients and the safty of the drug.METHODS： Thirty-nine severe burn patients were randomly divided into two groups： control group（C group， nineteen patients） and L-glutamine treatment group（GLN group， twenty patients） .GLN group patients were given L-glutamine in a dose of 30g per day for 7 days， and C group patients were given the same dosage of placebo for 7 days.The plasma L-glutamine concentration， the degree of intestinal mucosa damage， blood biochemistry and complication were observed and wound healing rate of burn area was determined， then the length of hospital stay was recorded.RESULTS： After 7 days of taking L-glutamine orally， plasma L-glutamine concentration in GLN group was significant higher than that in C group（P<）. The degree of intestine damage and intestinal mucosal permeability in GLN group were lower than those in C group. In addition, the wound healing rate was faster and the length of hospital stay was shorter in GLN group than those in C group. CONCLUSION: Administration of L-glutamine could abate the degree of intestine damage obviously, lessen intestinal mucosal permeability, ameliorate wound healing rate and reduce the length of hospital stay.