OBJECTIVE:To improve the determination method for the contents of main components and related substances in Loxoprofen sodium tablets. METHODS:RP-HPLC method was adopted. The determination was performed on Inspire C18 column with mobile phase consisted of acetonitile-0.01 mol/L potassium dihydrogen phosphate(containing 0.2% triethylamine,phosphoric acid adjusted to 3.0±0.1,62 : 38,V/V)at the flow rate of 1.0 mL/min. The column temperature was 40 ℃,and the detection wave-length was set at 221 nm. The sample size was 20 μL. RESULTS:The peak of loxoprofen sodium was well separated with the peak of its related substances(R>1.5). The linear range of loxoprofen sodium ranged 30.0-90.0 μg/mL(r=0.9998). The detection lim-it of loxoprofen was 0.3 μ g/mL. RSDs of precision,stability and repeatability tests were <1.0% . The average recovery rates ranged 99.00%-99.87%(RSD=0.33%,n=9). CONCLUSIONS:This method is accurate,simple,rapid and suitable for the quali-ty control of Loxoprofen sodium tablets.

A strain of Cellulosimicrobium cellulans Ha8 was studied on its morphological, biological characteristics and its utilization of several kinds of benzoic compounds, the results showed this strain was Gram-positive, the long rod-shaped cells were changed into short rod-shape gradually. pH value from pH 6.0 to pH 9.0 and the temperature from 20 ℃ to 40 ℃ were good for its growth. It could not only hydrolyze protein and starch, use cellulose and pectin, decomposite chitin, liquify gelatin and fix nitrogen, but also use phenol, xylene, benzoic, cinnamic acids and diphenlamine as the sole carbon resource for its growth. It could tolerate 0 mmol/L~30 mmol/L, 0 mmol/L~8 mmol/L, 0 mmol/L~30 mmol/L, 0 mmol/L~15 mmol/L and 0 mmol/L ~ 40 mmol/L of benzoic acids, phenol, xylene, cinnamic acids and diphenlamine seperately, but could not use 2,4-dinitrophenol, o-Nitrophenol, 2-Methoxyphenol, aminobenzenesulfonic acid, catechol and o-Phenanthroline as its sole carbon resource.

Objective To investigate epidemiological and clinical features of patients with clonorchiasis sinensis infection. Methods The epidemiological, clinical, laboratory and treatment data of clonorchiasis patients in Department of Infectious Diseases, Second Affiliated Hospital, Harbin Medical University from 2002 to 2004 were retrospectively analyzed. Results Sixty-eight point two percent patients had a history of eating raw freshwater fish and shrimp. Patients with occupations as cook, fish stock man, fishing man and fishmonger accounted for 22.6%. The transmission route was not clear in 9.1% of patients. The common clinical manifestations were abdominal pain (60.3%), fatigue (52.3%), diarrhea (33.0%), anorexia (69.3%), jaundice (23.9%), hepatomegaly (59.1%), splenomegaly (8.0%), dizziness (20.9%), fever (5.7%) and biliary colic (14.8%). Twenty-eight point four percent were asymptomatic. Other findings included liver dysfunction (70.4 %) and eosinophile granulocyteosis(69.3 %). Negative rate of stool egg of clonorchis sinensis after treatment with praziquantel or albendazole was 91.9% or 86.5%, respectively. There was no significant difference between the two groups ( χ2 = 0.561, P = 0.454). Conclusions Clinical manifestations of patients with clonorchiasis sinensis are complicated and often accompanied with liver dysfunction. Clonorchiasis sinensis is often misdiagnosed and should be paid much attention.

Objective To investigate the therapeutic effect of endothelial progenitor cells(EPCs) in ameliorating rat progressive focal segmental glomerular sclerosis(FSGS) model induced by adriamycin.Methods Bone marrow mononuclear cells from male SD rats,after cultured by adherence method,were identified as EPCs.Female SD rats were divided into normal control group,adriamycin induced renal disease(ADR) group,EPCs transplantation group.ADR group and EPCs group underwent unilateral nephrectomy and received 5,3 mg/kg of adriamycin via tail vein 1 week and 2 weeks after operation,while the control group underwent sham operation and received 0.9% sodium chloride solution of equal volume.The whole body irradiation by 5 Gy X ray was done 1 week after the 2nd injection of adriamycin,then immediately 1?106 EPCs were transplanted via tail vein.The rats in control group and ADR group were only injected with 0.9% sodium chloride solution after whole body irradiation.The body weight and urine protein were measured before operation(0 week) and 4(1 week after EPCs transplantation),8,12 and 16 weeks after nephrectomy.Y chromatosome incorporation was detected with in situ hybridization at the 4th and 16th week.The histological and ultrastructural changes of kidney were evaluated at the 16th week.Results At the 4th and 16th weeks,Y chromatosome positive cells could be found incorporation in the area of glomerular and tubular epithelial cells.Since the 4th week,the weight of rats in both ADR group and EPC group became significantly less than that in control group and since the 8th week that in ADR group became less than that in EPC group(P

BACKGROUND:Our previous studies have shown that strontium-doped calcium polyphosphate containing low-dose strontium appears to have a significant effect on angiogenesis-related behaviors of monocultured umbilical vein endothelial cells and osteoblasts.
OBJECTIVE:To investigate the effect of strontium-doped calcium polyphosphate on angiogenesis-related behaviors of umbilical vein endothelial cells and osteoblasts co-cultured, including celladhesion, spreading, proliferation, as wel as the protein secretion of vascular endothelial growth factor and basic fibroblast growth factor from co-culture system in vitro.
METHODS:Human umbilical vein endothelial cells and osteoblastic cells (MG63) were utilized in this study. cells from passage 3 were used for preparation of the cel-scaffold constructs. After placed in 24-wel plate at a ratio of 2:1, human umbilical vein endothelial cells and MG63 cells were seeded onto strontium-doped calcium
polyphosphate, calcium polyphosphate and hydroxyapatite scaffolds and co-cultured for 7 days. The vascular endothelial growth factor and basic fibroblast growth factor protein levels were determined through a double ligand enzyme-linked immunosorbent assay. The colorimetric 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay was performed to quantify the effect of scaffolds on cellproliferation.
RESULTS AND CONCLUSION:Compared with those on calcium polyphosphate and hydroxyapatite scaffolds, cells on strontium-doped calcium polyphosphate scaffolds attached and spread better with a significantly improved cellproliferation. More importantly, the vascular endothelial growth factor and basic fibroblast growth factor expressions were significantly higher in the strontium-doped calcium polyphosphate group than the other two groups (P<0.05), indicating strontium-doped calcium polyphosphate can up-regulate levels of vascular endothelial growth factor and basic fibroblast growth factor proteins.

OBJECTIVE To study the HBV-DNA level and its replication with only HBsAb positive for transplantation. METHODS Serial serum samples were studied with the quantitative determination of HBV-DNA by a quantitative PCR assay and determination of HBsAb by ELISA. RESULTS The positive rate of HBV-DNA was 8.4% in the patients with only HBsAb positive and that was 11.11% in the patients who had not been injected with vaccine;the level of HBV-DNA in 11 samples was less than 10~4 copies/ml and five samples showed the amount between 10~4-10~6 copies/ml.The positive rate of HBV-DNA was 8.4% in the patients with only HBsAb positive and that was 11.11% in the patients who had not been injected with vaccine;the level of HBV-DNA in 11 samples was less than 10~4 copies/ml and five samples showed the level between 10~4-10~6 copies/ml. CONCLUSIONS Patients with only HBsAb positive are still infective,which should be paid attention in transplantation.

OBJECTIVETo explore the effect of Modified Hangqi Chifeng Decoction (MHCD) on levels of collagen type IV (Col IV), matrix metalloproteinase-2 (MMP-2), tissue inhibitor of metalloproteinase-2 (TIMP-2) in extracellular matrix (ECM) of glomerular mesangial cells (GMCs) in LPS induced mice.

METHODSNormal serum and telmisartan, high, medium, low dose MHCD containing serums were prepared by using serum pharmacology method. GMCs were cultured in vitro. The proliferation of mesangial cells were induced using LPS as stimulating factor. GMCs were divided into six groups, i.e., the normal group, the model group, the telmisartan group, high, medium and low dose MHCD groups. Col IV content in the supernatant of mesangial cells was detected using ELISA. Protein expressions of MMP-2 and TIMP-2 were detected using Western blot.

RESULTSCompared with the normal group, Col IV content obviously increased in the model group after 72-h LPS stimulation; protein expressions of MMP-2 and TIMP-2 were obviously up-regulated, and MMP-2/TIMP-2 ratio was down-regulated in the model group (P < 0.01). Compared with the model group, Col IV content obviously decreased in high and medium dose MHCD groups and the telmisartan group (P < 0.01); protein expressions of MMP-2 were obviously down-regulated in medium and low dose MHCD groups (P < 0.01, P < 0.05); the protein expression of TIMP-2 was obviously down-regulated in high, medium, low dose MHCD groups and the telmisartan group (P < 0.01). The pro- tein expression of TIMP-2 was obviously lower in the high dose MHCD group than in the low dose MHCD group (P < 0.01). MMP-2/TIMP-2 ratio was obviously up-regulated in the telmisartan group, high and medium dose MHCD groups (P < 0.01).

CONCLUSIONMHCD could regulate disordered MMP-2/TIMP-2 ratio in LPS induced ECM, inhibit excessive production of Col IV in ECM, promote the degradation of ECM, reduce the accumulation of ECM, thereby, delaying the process of glomerular sclerosis.

Animals ; Cells, Cultured ; Collagen Type IV ; metabolism ; Extracellular Matrix ; metabolism ; Kidney Glomerulus ; cytology ; Matrix Metalloproteinase 2 ; metabolism ; Mesangial Cells ; drug effects ; Mice ; RNA, Messenger ; metabolism ; Tissue Inhibitor of Metalloproteinase-2 ; metabolism

We designed and synthesized eighteen lycorine derivatives with five different structural types, and evaluated their antiviral activities on a HCoV-OC43-infected H460 cell model. Structure-activity relationships suggested that the introduction of appropriate substituents on the 6N atom of lycorine was beneficial to activity. Compound 6a gave a good activity with the half effective concentration (EC₅₀) and selectivity index (SI) values of 2.36 μmol·L^-1 and 16.52, respectively. Surface plasmon resonance (SPR) result indicated that 6a might target the non-structural protein 12 (NSP12) subunit in RNA-dependent RNA polymerase (RdRp) of SARS-CoV-2 with the dissociation constant (K_D) value of 1.36 μmol·L^-1. Molecular docking indicated that 6a might act on nidovirus RdRp-associated nucleotidyltransferase (NiRAN) catalytic center of NSP12, distinct from the mechanism of nucleoside-like drugs such as remdesivir. This study provides scientific data for the development of lycorine derivatives into a new class of anti-SARS-CoV-2 small molecule inhibitors.

Objective To establish nucleic acid testing techniques for detecting Nipah virus (NiV) and Hendra virus (HeV), and to test the NiV and HeV in peripheral blood collected from domestic pigs, cows and goats in Chongqing. Methods Peripheral blood samples of 580 domestic pigs, 250 cows, 180 goats were collected from Chongqing since June 2007 to June 2008. The lymphocytes were separated by density gradient centrifugation and total RNA was extracted using Trizol method for detection of NiV and HeV with one-step real-time RT-PCR. Sequence identification and analysis were performed for positive PCR prod-ucts. Virus isolation and culture were adopted for positive samples, and epidemiologic reports were submit-ted. Results Nucleic acid detections searching for NiV and HeV were successfully performed in animal blood samples collected from Chongqing. "Takeoff points" were not found in fluorescence amplification curves of all samples. Curves kept the same slope, and assays were judged as negative. Conclusion Until now, Neither NiV or HeV infection has been found in domestic animals blood samples collected from Chongqing, which suggest a lower possibility of outbreaks of Nipah disease and Hendra disease in Chongqing in the near future.