ABSTRACT
Lipasin has recently been demonstrated to be involved in lipid metabolism. In this study, two specific primers were used to amplify the lipasin open reading frame from porcine liver tissue. The polymerase chain reaction product was cloned to a pGEM®-T Easy Vector, digested by SalI and NotI, and sequenced. The lipasin fragment was then cloned to a pET21(b) vector and digested by the same restriction enzyme. The recombinant plasmid was transferred to Escherichia coli (BL21), and the lipasin protein was induced with isopropyl-ß-D-thiogalactopyranoside. The protein obtained was identified by sodium dodecyl sulfate polyacrylamide gel electrophoresis and western blotting. A pET-lipasin prokaryotic recombinant expression vector was successfully constructed, and a 25.2-kDa protein was obtained. This study provides a basis for further research on the biological function of porcine lipasin.
Subject(s)
Lipid Metabolism/genetics , Recombinant Fusion Proteins/biosynthesis , Swine/genetics , Angiopoietin-Like Protein 8 , Angiopoietin-like Proteins , Animals , Cloning, Molecular , Escherichia coli/genetics , Gene Expression Regulation , Liver/metabolism , Peptide Hormones/genetics , Recombinant Fusion Proteins/geneticsABSTRACT
OBJECTIVE: To observe the efficacy and safety of co-artemether and one of its components benflumetol (two formulations) in the treatment of patients with falciparum malaria. METHODS: Adopting double-blining, randomization and comparative method, all patients were hospitalized and observed for 28 days after treatment. RESULTS: Of 150 patients, 51 patients were treated with co-artemether group(A), 50-patients were treated with benflumetol tablet group(B), 49 patients were freated with benflumetol capsule group(C). The mean fever clearance times for groups A, B and C were 17.1 +/- 8.6, 34.0 +/- 23.2 and 29.4 +/- 24.9 hours, respectively; the mean parasite clearance times were 29.7 +/- 8.9, 51.6 +/- 14.1 and 54.7 +/- 17.4 hours respectively; the cure rates in 28 days for groups A, B and C were 98.2%, 92.0% and 95.8%, respectively. No apparent side-effect was observed. CONCLUSION: Co-artemether and benflumetol (2 formulations) are effective for the treatment of patients with falciparum malaria but co-artemether is more effective than benflumetol (2 formulations) in terms of controlling symptoms and killing parasites.
Subject(s)
Antimalarials/administration & dosage , Artemisinins/administration & dosage , Ethanolamines/administration & dosage , Fluorenes/administration & dosage , Malaria, Falciparum/drug therapy , Sesquiterpenes/administration & dosage , Adolescent , Adult , Artemether, Lumefantrine Drug Combination , Double-Blind Method , Drug Combinations , Humans , LumefantrineABSTRACT
Compound 3 (deoxoqinghaosu) and compound 4 (deoxocarbaqinghaosu) were synthesized from arteannuic acid (2). Primary exploration of their antimalarial effect against K173 strain of Plasmodium berghei shows that compound 3 is somewhat more effective than the natural compound--qinghaosu. However, the carba-analogue compound 4 is almost ineffective. The enhanced activity of compound 3 is supposedly ascribed to its higher lipophilicity and, hence, higher affinity for plasmodial membrane. Further studies are in progress.
