1.Analysis of the Deficiency of Postnatal Lack of Lactation of
Journal of Zhejiang Chinese Medical University 2017;41(2):127-129
[Objective] The artical summarizes
2.Optimization of Extraction Process of Berberine Hydrochloride from Sanhuang Diyu Oil by Box-Benhnken Response Surface Methodology
China Pharmacist 2017;20(1):56-59
Objective:To optimize the extraction process of berberine hydrochloride from Sanhuang Diyu oil by Box-Benhnken re-sponse surface methodology. Methods:The extraction process was optimized with the size of each medicine ( X1 ) , the liquid-solid ra-tio ( X2 ) and the extraction time ( X3 ) as the independent variables and berberine hydrochloride extraction amount ( Y) as the depend-ent variable, and the effects of variables and their interactions on the extraction efficiency were studied. Results:The experiment results indicated that the optimal extraction conditions were as follows:the size of each medicine was 60 meshes, the liquid-solid ratio was 18, and the extraction time was 1. 5 h. Under the above conditions, 3 batches of berberine hydrochloride from Sanhuang Diyu oil were ex-tracted. The average extraction rate of berberine hydrochloride was (16.6 ±0.6) mg·g-1(n =3). Conclusion: The extraction process of Sanhuang Diyu oil optimized by Box-Behnken response surface methodology is simple, stable and predictable.
3.Current status of diagnosis and treatment of pancreatic encephalopathy
Journal of Clinical Hepatology 2017;33(1):46-48
Pancreatic encephalopathy (PE)is a serious complication of pancreatitis,with difficulties in early diagnosis and poor prognosis. This article introduces the possible pathogenesis of PE involving pancreatin activation,cytokines,infection,water and electrolyte imbalance, and vitamin deficiency,summarizes the clinical manifestations and laboratory features of PE,and points out that the clinical manifestations of PE lack specificity and there are no reliable biochemical indices or diagnostic criteria.This article also elaborates on the diagnosis and treat-ment strategies for PE and points out that the key to PE treatment is active and effective treatment of the primary disease.Most PE patients are improved with the control of pancreatitis.
4.Determination of the Content of Gentamycin Sulfate C Component in Medicinal Albumin Gel by HPLC
China Pharmacy 2007;0(34):-
OBJECTIVE:To establish a HPLC method for the determination of gentamycin sulfate C component in medicinal albumin gel. METHODS: Samples was separated on Agilent ZORBAX Eclipse XDB-C8 at a column temperature of 26℃. The mobile phase was methanol-acetic acid-water (70∶5∶25, added with 0.02mol?L-1 sodium heptanesulfonate solution) for gradient elution at a flow rate of 1.0mL?min-1. The detection wavelength was set at 330nm. RESULTS: Baseline separation of gentamycin sulfate C component in medicinal albumin gel was achieved. The linear range of gentamycin sulfate C component was 0.26?g~6.50?g and its average recovery rate was 90.0%, RSD=0.43%, the lowest limit of detection was 0.368ng. CONCLUSION: The method was proved to be simple, accurate and reliable, and suitable for the content determination of gentamycin sulfate C component in related preparations.
5.Determination of ?~9-tetrahydrocannabinol Content in Hemp by GC-MS
China Pharmacy 1991;0(03):-
OBJECTIVE:To determine the content of ?9-tetrahydrocannabinol (THC) in hemp by GC-MS. METHODS: HP-5 quartz capillary column was used. The temperature programming was as follows: the initial temperature was kept at 200 ℃ for 1 min, then raised to 270 ℃ at the rate of 3 ℃?min-1 and kept for 10 min; the injector temperature was 280 ℃and the detector temperature was 290 ℃. RESULTS: The good linearity between peak area and concentration was obtained over the range of 5.0 ~45.0 ?g?mL-1 (r=0.998 7). The lowest detectable limit was 1.0 ?g?mL-1(S/N=5).The average recovery rate was 81.1% (RSD=3.8%,n=9). CONCLUSION: The procedure is simple, accurate and reproducible, and suitable for the quality control of hemp preparation.
6.Bioanalytical Methodology Validation
China Pharmacy 2007;0(31):-
OBJECTIVE: To introduce the methodology validation and quality control in bioanalytical procedures and its expected trend of development.METHODS: According to the bioanalytical validation reflected in FDA guidelines and other publications,based on the guidance of SFDA and the standard operating procedure of our phase I clinical trial lab,we summarized the procedure and questions of bioanalytical methodology validation.RESULTS: The methodology validation and quality control in bioanalytical procedures and the possible risks involved in the methodology validation were summarized.CONCLUSIONS: The established methodology validation in bioanalytical procedure and quality control contents were basically consummate,but the standards for the methodology validation should be formulated based on reality.
7.Effect of SUMOylation on maintenance of telomere
Chinese Journal of Pathophysiology 2000;0(10):-
Telomeres are the unique structure at the end of chromosomes,which pose two special challenges for the cellular DNA replication and repair machinery.Because of the inability of lagging strand synthesis to fully replicate a linear template,the chromosome ends is progressively shortening at each replication cycle.The tandem DNA repeats must maintain enough length to allow the cell dividing and mitosing,otherwise the cells would lose the dividing ability and undergo replicative senescence.There are two special pathways to regulate telomere length,which consist of telomerase and alternative lengthening of telomeres(ALT).SUMO is an evolutionarily conserved protein,which is covalently attached to target proteins and alters their conformation,stability,interaction and localization.Currently,a lot of proteins have been proved to be the substrates of SUMOylation.A growing body of evidence implicate that SUMOylation plays a very important role to elongate telomeres in both telomerase and ALT.The Rad5 and Rad52,as well as BLM have been showed either to be modified by SUMO or to interact with SUMO.SUMOylation positively modifies the activity of telomere.
8.The role of Toll-like receptor 4 in malignant lymphoma
Practical Oncology Journal 2014;(5):456-459
The pathogenesis of malignant lymphoma has been an important topic in tumor research ,but it is still unclear.Recent clinical studies showed that the expression level of Toll -like receptor 4(TLR4)was signif-icantly high in mantle cell lymphoma tissue and a variety of lymphoma cell lines .At the same time,the TLR4 ex-pression level was correlated with prognosis .The Role of TLR4 in malignant lymphoma for occurrence and devel-opment is reviewed in this article ,which may elucidate the pathogenesis and provide a new basis for the therapy of lymphoma.
9.Cloning of Human Ro60 cDNA and Construction of Baculovirus Expression Vector
Chinese Journal of Dermatology 1994;0(02):-
Objective To construct a baculovirus expression vector for expression of human Ro60 cDNA. Methods Ro60 cDNA was cloned from Hela cell RNA with RT-PCR and was inserted into plasmid pFastBac HTc. Plasmid pFastBac HTc-Ro60 was then transformed into E. coli DH10Bac competent cells for transposition. The constructed recombinant was determined by both blue-white colony screening and PCR analysis. Results A 1.56kb Ro60 cDNA was obtained from Hela cell RNA and was successfully inserted to plasmid pFastBac HTc. DNA sequencing and restriction enzyme analysis revealed that both open reading frame and sequence of the cDNA were identical to Ro60 sequence previously published. Specific transposition and virus recombination were obtained in the vector Bacmid-Ro60. Conclusion Ro60 cDNA has been successfully cloned and constructed to baculovirus expression vector, which is useful for protein expression and further study of this autoantigen in the pathogenesis of lupus erythematosus.
10.Study of Cytokeratin 20 Expression and p53 Gene Mutation in Peripheral Blood of Patients with Colorectal Carcinoma
Journal of Chinese Physician 2001;0(03):-
Objective To set up an efficient and rapid method for detecting CK20 expression in peripheral blood of patients with colorectal carcinoma, and explore the relationship between CK20 expression and micrometastasis of colorectal carcinoma. Methods CK20 mRNA expression in peripheral blood of 36 patients with colorectal carcinomas was detected at various time points before and after operation by fluorescent RT-PCR. The mutation of p53 gene was also detected using SSCP. Results The positive rate of CK20 mRNA expression in peripheral blood before and 24 hours after operation was 75%(27/36) and 83.3%(30/36), respectively. After the short-term chemotherapy, the positive rate of CK20 mRNA expression was 36%(13/36). No mutation of p53 gene was found in those patients. Conclusion Fluorescent RT-PCR for detecting CK20 mRNA expression in peripheral blood was simple and efficacious. It was useful to monitor micrometastasis of colorectal carcinoma.