To study the expression of Dickkopf-1 (DKK-1) in endometrium of pregnant mice during the peri-implantation period and the role of DKK-1 during the embryo implantation in mice. Immunohistochemical technique was employed to determine the location of DKK-1 protein in endometrium, and semiquantitative reverse transcriptase polymerase chain reaction (RT-PCR) was utilized to determine the levels of DKK-1 mRNA. Our results showed that the expressions of DKK1 mRNA and protein were higher in experimental groups than in control group (P<0.01) and it increased significantly on day 3 and reached its peak on day 4, and then decreased gradually on day 5-7. The levels of DKK-1 mRNA and protein on day 4 was significantly higher than those of other groups (P<0.01). It is concluded that DKK-1 probably plays an important role in signal transudation of embryo implantation and its high expression indicates the opening of implantation window.
Embryo Implantation/*genetics ; Endometrium/*metabolism ; Intercellular Signaling Peptides and Proteins/*biosynthesis ; Intercellular Signaling Peptides and Proteins/genetics ; Protein Biosynthesis ; RNA, Messenger/genetics ; Transcription, Genetic

OBJECTIVETo investigate the role of tazarotene induced gene-2 (TIG2) in psoriasis vulgaris.

METHODSTIG2 protein and mRNA expressions in normal tissues, psoriatic lesions and uninvolved skin tissues were detected by immunohistochemistry and in situ hybridization, respectively.

RESULTSTIG2 protein and mRNA were expressed in all the layers of normal and uninvolved epidermis. TIG2 expression was detected in the upper layers of the stratum spinosum of the marginal region of the psoriatic lesions, but not in the central area of the lesions. TIG2 expression was significantly lower in the basal layers of the central area of the paoriasis than that in the normal skin and uninvolved tissues (P < 0.01), and also lower in the marginal regions of the lesions (P < 0.01).The suprabasal layers of the marginal region in the lesion showed significantly lower TIG2 expression than the central area of the lesion (P < 0.01).

CONCLUSIONTIG2 may maintain the normal differentiation of epidermal keratinocytes and implicate in the pathogenesis and development of psoriasis vulgaris.

Adolescent ; Adult ; Chemokines ; Chemotactic Factors ; biosynthesis ; genetics ; Female ; Humans ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; genetics ; Keratinocytes ; metabolism ; Male ; Middle Aged ; Psoriasis ; genetics ; metabolism ; RNA, Messenger ; biosynthesis ; genetics

This study was aimed to investigated the mRNA expression levels of Notch ligands- Delta-like-1 and Jagged-1 in bone marrow mesenchymal stem cells of patients with myelodysplastic syndrome (MDS), and to explore their relation with onset of MDS. Bone marrow mesenchymal stem cells of 38 patients with MDS and 16 normal subjects as control were collected to detect mRNA expression of Delta-like-1 and Jagged-1 by using real-time quantitative polymerase chain reaction. The results showed that the expression levels of Delta-like-1 and Jagged-1 in mesenchymal stem cells of MDS patients were significantly higher than that in normal controls (P < 0.05). According to WHO criteria, the mRNA expression of Delta-like-1 in RA/RAS, RCMD and RAEB groups were significantly higher than that in normal controls (P < 0.05), the mRNA expression of Jagged-1 in RAEB group was also significantly higher than that in normal controls (P < 0.05). The mRNA expression of Delta-like-1 was significantly correlated with the proportion of blasts in the bone marrow of MDS patients (r = 0.502, P < 0.05). The expression levels of Delta-like-1 and Jagged-1 in MDS patients with abnormal karyotypes were significantly higher than those in MDS patients with normal karyotypes (P < 0.05). The mRNA expression of Delta-like-1 in higher risk group according to International Prognostic Scoring System was significantly higher than that in lower risk group (P < 0.05), there was no significant difference in Jagged-1 expression levels between higher risk group and lower risk group (P > 0.05). It is concluded that the changes of Delta-like-1 and Jagged-1 expression level in MSC may play a role in the pathogenesis of myelodysplastic syndrome.
Calcium-Binding Proteins ; genetics ; Gene Expression Regulation, Neoplastic ; Humans ; Intercellular Signaling Peptides and Proteins ; genetics ; Intracellular Signaling Peptides and Proteins ; genetics ; Jagged-1 Protein ; Membrane Proteins ; genetics ; Mesenchymal Stromal Cells ; metabolism ; Myelodysplastic Syndromes ; genetics ; RNA, Messenger ; biosynthesis ; Serrate-Jagged Proteins

Nocathiacin I, a glycosylated thiopeptide antibiotic, displays excellent antibacterial activities against multidrug resistant bacterial pathogens. Previously, a novel nocathiacin I formulation for intravenous administration has been successfully developed and its aqueous solubility is greatly enhanced for clinical application. The purpose of the present study was to increase the fermentation titer of nocathiacin I and reduce or eliminate analogous impurities by screening the medium ingredients using response surface methodology. After a sysmatic optimization, a water-soluble medium containing quality-controllable components was developed and validated, resulting in an increase in the production of nocathiacin I from 150 to 405.8 mg·L at 150-L scale. Meanwhile, the analogous impurities existed in reported processes were greatly reduced or eliminated. Using optimized medium for fermentation, nocathiacin I with pharmaceutically acceptable quality was easily obtained with a recovery of 67%. In conclusion, the results from the present study offer a practical and efficient fermentation process for the production of nocathiacin I as a therapeutic agent.
Actinobacteria ; growth & development ; metabolism ; Anti-Bacterial Agents ; biosynthesis ; chemistry ; Bioreactors ; Culture Media ; Fermentation ; Intercellular Signaling Peptides and Proteins ; Peptides ; chemistry ; metabolism ; Quality Improvement

To study the expression of Dickkopf-1 (DKK-1) in endometrium of pregnant mice during the peri-implantation period and the role of DKK-1 during the embryo implantation in mice. Immunohistochemical technique was employed to determine the location of DKK-1 protein in endometrium, and semiquantitative reverse transcriptase polymerase chain reaction (RT-PCR) was utilized to determine the levels of DKK-1 mRNA. Our results showed that the expressions of DKK1 mRNA and protein were higher in experimental groups than in control group (P<0.01) and it increased significantly on day 3 and reached its peak on day 4, and then decreased gradually on day 5-7. The levels of DKK-1 mRNA and protein on day 4 was significantly higher than those of other groups (P<0.01). It is concluded that DKK-1 probably plays an important role in signal transudation of embryo implantation and its high expression indicates the opening of implantation window.
Animals ; Embryo Implantation ; genetics ; Endometrium ; metabolism ; Female ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; genetics ; Male ; Mice ; Pregnancy ; Protein Biosynthesis ; RNA, Messenger ; genetics ; Transcription, Genetic

OBJECTIVETo explore the effects of berberine and insulin on adiponectin mRNA expression in 3T3-L1 adipocyte.

METHODThe 3T3-L1 adipocyte was treated with berberine and insulin for 48 hours, the level of adiponectin mRNA in 3T3-L1 adipocyte expression was determined with semiquantity RT-PCR using beta-actin as internal reference.

RESULTThe level of adiponetin mRNA in 3T3-L1 adipocyte was increased after treated with berberine only (P < 0.05), the effect of berberine was inhibited by high concentration insulin (P < 0.05).

CONCLUSIONIn vitro, berberine increases the expression of adiponectin in 3T3-L1 adipocyte, insulin inhibits the effect of berberine.

3T3-L1 Cells ; metabolism ; Adipocytes ; cytology ; metabolism ; Adiponectin ; Animals ; Berberine ; pharmacology ; Insulin ; pharmacology ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; genetics ; Mice ; RNA, Messenger ; biosynthesis ; genetics

OBJECTIVE: To explore the down-expression mechanism of MYETS1 gene in multiple myeloma cell lines ARH-77 or KM3, and express MYETS1 gene in prokaryotic express system. METHODS: The region of chromosome 13q14.3 in ARH-77 and KM3 was detected by FISH. MYETS1 gene was amplified by RT-PCR and cloned into prokaryotic expression vector pGEX-4T. RESULTS: Positive consequence was acquired in 13q14.3 where MYETS1 located by FISH in ARH- 77 and KM3 cell lines. Bioinformatics indicated highly sequence homology between MYETS1 and LECT1, but excluded the homology of open reading frame between MYETS1 and that of LECT1 by RT-PCR. Myets1 protein was expressed and harvested successfully. CONCLUSION The region of chromosome 13q14.3 ,where MYETS1 gene located, was not defected in ARH-77 and KM3 cell lines. Down-expression of MYETS1 might be regulated by other mechanisms in multiple myeloma cell lines.
Cell Line, Tumor ; Chromosomes, Human, Pair 13 ; genetics ; Gene Deletion ; Genetic Vectors ; genetics ; Humans ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; genetics ; Membrane Proteins ; biosynthesis ; genetics ; Multiple Myeloma ; genetics ; metabolism ; pathology ; Neoplasm Proteins ; biosynthesis ; genetics ; Recombinant Proteins ; biosynthesis ; genetics

Animals ; Connective Tissue Growth Factor ; Genetic Therapy ; Hepatocyte Growth Factor ; biosynthesis ; genetics ; Humans ; Immediate-Early Proteins ; biosynthesis ; genetics ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; genetics ; Liver Cirrhosis ; therapy ; Transforming Growth Factor beta ; biosynthesis ; genetics

Low-abundance cellular proteins normally invisible on the standard two-dimensional SDS-polyacrylamide gel electrophoresis (2-DE SDS-PAGE) map must be enriched appropriately in order to be visualized and identified in cells or tissues. We applied proteins of H. pylori strain 26695 to a immobilized heparin-affinity resin, which has an affinity for nucleic acid-binding proteins, protein biosynthesis factors, and growth factors. The whole cell extract of H. pylori strain 26695 was fractionated by the heparin-agarose chromatography, and was analyzed by 2-DE. The 2-DE SDS-PAGE displayed spots after silver staining, which were identified by matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS). Among the ca. 150 spots that were processed, 79 proteins representing 57 genes were identified. Eleven proteins were determined to be nucleic acid-associated. Eighteen proteins were newly identified in this study, including DNA topoisomerase I. These results may provide guidance for enriching low abundance proteins of H. pylori and contribute to the construction of a master protein map of H. pylori.
Chromatography* ; DNA Topoisomerases, Type I ; Electrophoresis ; Electrophoresis, Polyacrylamide Gel ; Helicobacter pylori* ; Helicobacter* ; Heparin* ; Intercellular Signaling Peptides and Proteins ; Mass Spectrometry ; Protein Biosynthesis ; Proteome ; Silver Staining

HIV-1 integrase (IN) is a key enzyme for the viral replication. The protein-protein interaction (PPI) between HIV-1 IN and a cellular cofactor lens epithelium-derived growth factor (LEDGF/p75) is a validated target for anti-HIV drug discovery. In order to build the platform for screening inhibitor against PPI between IN and LEDGF/p75, the vector containing the LEDGF/p75 protein cDNA was constructed and expressed in Escherichia coli and the function of the LEDGF/p75 protein was assayed. The LGDGF/p75 encoding gene optimized according to the preference codon usage of E. coli, was synthesized and cloned into the expression vector pGEX-4T-1 to form a recombined plasmid, then transformed into host cell E. coli BL21 (DE3). The recombined clones were identified and confirmed by BamH I/Sal I digestion and sequencing, the successfully recombined plasmid in the host cell was induced by IPTG and the condition of the expression was optimized. The expressed protein was purified by the Ni2+ affinity chromatography column and SDS-PAGE was used to analyze the molecular weight and specificity. In addition, ELISA assay was used to analyze the function of the recombinant protein. The recombinant LGDGF/p75 was soluble, and expressed highly and stably in E. coli. The protein was proved to enhance HIV-1 IN strand transfer activity in vitro by ELISA. It will be helpful to build the platform of screening inhibitors against PPI between IN and LEDGF/p75.
Cloning, Molecular ; Escherichia coli ; metabolism ; HIV Integrase ; metabolism ; HIV-1 ; physiology ; Humans ; Intercellular Signaling Peptides and Proteins ; biosynthesis ; Protein Binding ; Virus Replication