4.Overexpression of PDZ1 domain of PSD-95 protein rescues hippocampal neurons from apoptosis induced by oxygen-glucose deprivation.
Shu-Qun HU ; Yan-Yan ZONG ; Guang-Yi ZHANG
Acta Physiologica Sinica 2008;60(6):730-736
To detect the effect of PDZ1, domain of postsynaptic density 95 (PSD-95), on apoptosis of hippocampal neurons induced by oxygen-glucose deprivation (OGD), Sprague-Dawley rat hippocampal neurons were infected with PDZ1-viruses after 21 days of plating. Twenty-four hours after infection, cells were treated with OGD for 1.5 h, then were incubated with DAPI and apoptosis-like cells were characterized, or were collected for co-immunoprecipitation and Western blot analyses. The results showed that: (1) PDZ1 overexpression was observed in hippocampal neurons; (2) Apoptosis induced by OGD was obviously decreased in neurons overexpressing PDZ1 (P<0.05); (3) Overexpression of PDZ1 prevented the binding of GluR6 to PSD-95; (4) Overexpression of PDZ1 inhibited MLK3 and JNK1/2 activation induced by OGD. These results indicate that overexpression of PDZ1 may prevent hippocampal neurons from apoptosis induced by OGD.
Animals
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Apoptosis
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Cells, Cultured
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Culture Media
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chemistry
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Disks Large Homolog 4 Protein
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Glucose
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chemistry
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Hippocampus
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cytology
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Intracellular Signaling Peptides and Proteins
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metabolism
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Membrane Proteins
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metabolism
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Neurons
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cytology
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pathology
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Oxygen
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chemistry
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PDZ Domains
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Rats
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Rats, Sprague-Dawley
5.Caffeoyl phenylethanoid glycosides from Callicarpa kwangtungensis.
Xiao HU ; Li LI ; Yi-Fang YANG ; Chun-Yue HUANG ; Guang-Lei HUANG
China Journal of Chinese Materia Medica 2014;39(9):1630-1634
Phytochemical investigation on the EtOH extract from the aerial part of Callicarpa kwangtungensis led to the isolation and characterization of 10 caffeoyl phenylethanoid glycosides, 2'-acetylacteoside (1), tubuloside E (2), acteoside (3), tubuloside B (4), isoacteoside (5), alyssonoside (6), 2'-acetylforsythoside B (7), brandioside (8), forsythoside B (9), and poliumoside (10). Compound 4 was isolated from the plants of Verbenaceae,and 6 was obtained from the Callicarpa genus, for the first time, while compounds 1, 2, 5 and 7 were firstly reported from the plant.
Caffeic Acids
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chemistry
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isolation & purification
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Catechols
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chemistry
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isolation & purification
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Chromatography, High Pressure Liquid
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Ethanol
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chemistry
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Glucosides
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chemistry
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isolation & purification
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Glycosides
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chemistry
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isolation & purification
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Phenols
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chemistry
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isolation & purification
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Verbenaceae
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chemistry
6.Analvsis of survev results of human brucellosis in Oinghai province from 2006 to 2010
Guang, TIAN ; Gui-ying, HU ; Chao, LI ; Li-qing, XU ; li, MA ; Zu-yi, LIU
Chinese Journal of Endemiology 2012;31(1):88-90
Objective To analyze the epidemiological features and influencing factors of human brucellosis in Qinghai province,and to provide scientific basis for prevention and control of brucellosis.Methods From 2006 to 2010,select the high incidence areas of brucellosis in Qinghai province and five counties(Henan,Dari,Tianjun,Ping'an and Haiyan counties) included in the “Central Subsidies to Local Public Health Special Fund Human Brucellosis Prevention and Control Projects” for the survey point,as well as high-risk employees from Qinghai Biological Pharmaceutical Factory were investigated.Combined with epidemiological questionnaire investigation [done according to the “National Human Brucellosis Surveillance Program(Trial)”],clinical symptoms and signs,confirmed human brucellosis patient were tested by intradermal allergy test,rose bengal plate agglutination test(RBPT) and standard tube agglutination test (SAT),in accordance with “Diagnostic Criteria and Principles of Management of Brucellosis” (GB 15988-1995) and“Diagnostic Criteria for Brucellosis” (WS 269-2007).Results Of 8368 serum samples detected,347 were RBPT positive,and the positive rate was 4.15%;5346 serum samples were tested by SAT,180 were positive,and the positive rate was 3.37%.In June 2009,112 employees in Qinghai Biological Pharmaceutical Factory were investigated on a follow-up survey,83 were RBPT positive,the positive rate was 74.11%; 58 were SAT positive,the positive rate was 51.79%.Eight of them were new cases and 4 were chronic brucellosis.Twenty five new cases were reported between 2006 and 2010.The peak incidence was from March to July.Most of the cases were herdsmen.ConclusionStrengthening animal quarantine,strengthening public education,and improving protection awareness,can effectively control the disease brucellosis.
7.Study on the quality of life and social support among people living with HIV/AIDS and their family members.
Li MA ; Dong-qing YE ; Guang-dong ZHANG ; Huai-guang QI ; Yi-lin HE ; Ai-xiang HU ; Wei JIN
Chinese Journal of Epidemiology 2007;28(3):254-257
OBJECTIVETo explore the quality of life and related social support among people living with HIV/AIDS with related factors.
METHODS331 people living with HIV/AIDS and 148 of their family members were selected using a typical sampling method. Questionnaires on general conditions, tables on history of infection, generic quality of life inventory-74 (GQOLI-74) and social support scale (SSS) were used.
RESULTSData from one-way analysis suggested that people living with HIV/AIDS and their family members with the different sexs, different villages and different cultural backgrounds had differences in GQOLI-74 scores (P < 0.05) while people living with HIV/AIDS with the different villages had differences in SSS scores (P < 0.05). Results from Multiple linear regression analysis revealed that being elderly and negative life events were negatively associated with social support (P < 0.05), while factors as more advanced educational background, harmonious neighborhood relationship and having bother pouring nature were the predictive factors (P < 0.05).
CONCLUSIONMany factors might affect dimensions of quality of life among people living with HIV/AIDS and their family members in rural areas of northern Anhui. Community care and social support of HIV/AIDS should still be greatly enhanced in the countryside of China. A community care mode based on family and neighborhood was expected to be developed.
Acquired Immunodeficiency Syndrome ; complications ; ethnology ; psychology ; China ; Cultural Characteristics ; Family Relations ; Female ; Humans ; Male ; Quality of Life ; Social Support
8.Cloning of mMR-1 gene and expression in Pichia pastoris systems.
Tian-Bo LI ; Yang HU ; Yi-Guang WANG ; Huan-Zhang XIA
Chinese Journal of Biotechnology 2005;21(1):25-29
hMR-1 (Homo Myofibrillogenesis Regulator 1, AF417001) is a novel homo gene, which was firstly cloned in our laboratory. The former studies revealed that hMR-1 is a transmembrane protein which shows protein interaction with sarcomeric proteins like myomesin I, myosin regulatory light chain, alpha-enolase and some cell regulator proteins such as eukaryotic translation initiation factor3 subunit 5 (eIF3S5) and etc. In this work, we focused on cloning the homologous gene of hMR-1 from mouse C57BL/6J and exploring its expression using Pichia pastoris yeast system. Two pairs of primers were synthesized according to the hMR-1 gene homologous sequence on mouse genome chromosome 1. The mouse MR-1 gene (mMR-1) was cloned by PCR following the first round RT-PCR from mouse C57BL/6J spleen total RNA. Sequence analysis verified that mMR-1 gene and amino acids sequence showed 90.4% and 90.1% identity with hMR-1, respectively. The prediction of hydrophobic transmembrane structure of mMR-1 suggested it is also a transmembrane protein. The mMR-1 Pichia pastoris expression vector pPIC9-mMR-1 was constructed by fusion of the flanking mMR-1 ORF in the pPIC9 plasmid. After linearization of pPIC9-mMR-1 with Sal I, the 8.5kb DNA fragment was transformed into Pichia pastoris GS115 strain by electroporation. GS115/Mut+ pPIC9-mMR-1 transformants were selected on minimal methanol medium. Integration of mMR-1 gene into the yeast genome in the recombinants was verified by PCR from the transformants total DNA. The mMR-1 protein was expressed by induction under the concentration of 0.5 % methanol. The specific induced protein of 25 kD molecular mass in SDS-PAGE was confirmed to be the mMR-1 protein by Western blot rsing hMR-1 polyclonal antibody. The expression level of this recombinant mMR-1 protein was about 50 mg/L. The successful expression of mMR-1 in the Pichia pastoris GS115 will facilitate the further functional analysis of the novel gene MR-1 in animal model.
Amino Acid Sequence
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Animals
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Cloning, Molecular
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Humans
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Mice
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Mice, Inbred C57BL
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Molecular Sequence Data
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Muscle Proteins
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biosynthesis
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genetics
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Pichia
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genetics
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metabolism
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Plasmids
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genetics
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Recombinant Proteins
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biosynthesis
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genetics
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Reverse Transcriptase Polymerase Chain Reaction
9.Urgent tracheal resection and reconstruction assisted by temporary cardiopulmonary bypass: a case report.
Hui GAO ; Bin ZHU ; Jie YI ; Tie-hu YE ; Yu-guang HUANG
Chinese Medical Sciences Journal 2013;28(1):55-57
Severe tracheal stenosis can not only cause critical medical problems such as severe shortness of breath, hypoxia, and even orthopnea, but also impose overwhelming challenges on the physicians, particularly the anesthesiologist. Life-threatening airway obstruction can make the patient's gas exchange extremely difficult.Though several options could be offered regarding the treatment of tracheal stenosis, normally, tracheal resection and following reconstruction is the first choice for severe airway stenosis. Successful surgical intervention relies on the close communication and cooperation between surgeons and anesthesiologists. In these cases, airway management is the top issue for the anesthesiologist, and the level of difficulty varies with stenosis location, severity of stenosis, and surgical technique. Extracorporeal membrane oxygenation (ECMO), or cardiopulmonary bypass (CPB), is rarely utilized for the surgery, but for those impossible airways due to nearly complete tracheal obstruction, ECMO or CPB could be the final choice for anesthesiologists. Here we report a case of successful urgent airway management for tracheal resection and reconstruction assisted by temporary CPB.
Cardiopulmonary Bypass
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Emergencies
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Female
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Humans
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Middle Aged
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Reconstructive Surgical Procedures
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methods
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Trachea
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surgery
10.Construction of Saccharopolyspora erythraea M synthesizing a novel ketolide 3-deoxy-3-oxo-erythronolide B.
Bu-Chang ZHANG ; Zhi-Hu ZHAO ; Yi-Guang WANG ; Qing-Jun MA
Chinese Journal of Biotechnology 2002;18(2):198-203
Genetic engineering on macrolide antibiotics was a new field in recent years and more than 100 novel polyketides had been produced until then. Using genomic DNA of S. erythraea A226 as a template, about 3.2 kb DNA fragment without KR6 domain was amplified by overlapping PCR technique and cloned into pWHM3 carrier, which resulted in the construction of homologous recombinant plasmid pWHM2201. Plasmid pWHM2201 was introduced into protoplasts of S. erythraea A226 by PEG-mediated transformation and integrated into the gene locus for erythromycin biosynthesis. After integrants grew for two generations on R3M media without Tsr, they were protoplasted and grown on R3M plates. By PCR identification, 8 mutants without KR6 domain were selected out and named S. erythraea M(1-8). With the identification of mass spectrometry, it was proved that S. erythraea M1 synthesized a novel ketolide compound 3-deoxy-3-oxo-erythronolide B.
Anti-Bacterial Agents
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biosynthesis
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chemistry
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Chromosomes, Bacterial
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Erythromycin
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analogs & derivatives
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biosynthesis
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chemistry
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Genetic Engineering
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Ketolides
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Molecular Structure
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Multienzyme Complexes
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genetics
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Saccharopolyspora
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enzymology
;
genetics
;
metabolism