Objective:To investigate the temporal and spatial distrib ut ions of collagenⅠ and Ⅲ during mouse tooth germ development and their function s during tooth mineralization.Methods:Immunohistochemistry stain ing technique was used to test the expressions of collagen Ⅰ and Ⅲ during mous e tooth germ development. Results:collagen Ⅲ was positive in or al epithelial cells in bud stage,in oral epithelial cells and in stellate reticu lum cells in cap stage. During bell and differentiation stage,collagen Ⅲ was positive in oral epithelial cells, stellate reticulum cells, dental papilla cell s and dental sac cells. During P2-10 d(crown development stage), collagen Ⅲ was expressed possitively in ameloblasts,enamel matrix,odontoblasts,predentin, dental papilla cells,dental sac cells and pulp tissues. During P10-30 d(toot h root development stage),collagen Ⅲ was strongly positive in Hertwig's epithe lial root sheath, cementum, alveolar bone and periodontal ligament cells apart f rom above mentioned cell types. CollagenⅠ was not expressed in bud stage and wa s positive in oral epithelial cells,stellate reticulum cells in cap stage. Durin g bell and differentiation stage,collagen Ⅰ was positive in oral epithelial ce lls, stellate reticulum cells, dental papilla cells and dental sac cells.After P2 d (crown and root development stage), the distribution and expression of co llagen Ⅰ were similar to those of collagen Ⅲ.Conclusions:Coll agenⅠand Ⅲ are involved in tooth germ and tooth tissue development. But the fu nction of collagenⅢ is more extensive than that of collagenⅠ.

Objective:To study the multiple alternative sp l iceosome of nfic gene in postnatal rat molar tissues. Methods: 3 d postnatal SD rat molar tissues were removed and mRNA was obtained by magne tic beads coupled with oligo-dT18. Two pairs of primers specific to the nfic gene were designed, and nfic gene in the rat molar tissue was amplified b y RT-PCR method.The fragments were inserted into competent DH5? bacteria.Posit ive clones were selected randomly and evaluated by enzyme digestion and sequenci ng.Results:Three alternative spliceosomes of nfic gene with the size of 1.5 kb,900 bp and 650 bp respectively were obtained. The spliceosome s were named rNFIC-1、 rNFIC-2 and rNFIC-3 respectively.Conclusion s:The nfic gene is expressed in postnatal rat molar, and there is a multiple alternative splicing way for the nfic gene to play function.

Objective:To prepare and identify a polyclonal antibody againstadam28 gene product.Methods:Theprotein coding region of ADAM28 was amplified by RT-PCR and cloned into pMD18-T Vector to produce the newconstruct, pMD18-T-adam28. The cloned ADAM28 segment was cut with two restriction enzymes and theadam28fregment was directed into the prokaryotic expression vector, pGEX-4T-1,to produce the expression vector pGEX-4T-adam28. The recombinant plasmid was transformed intoE. coliDH5?and GST-ADAM28 fusion protein was ob-tained after the inducement by IPTG. The fusion protein was extracted and purified by SDS-PAGE,and the newpro-tein band of 35 300 was isolated as antigen, the antigen was injected into rabbits to produce polyclonal antibody a-gainst ADAM28 product.Results:The expression vector pGEX-4T-adam28 was constructed successfully,and GST-ADAM28 fusion protein was obtained. The rabbit serum containing polyclonal antibody against ADAM28 productwas obtained and the antibody was purified by salting out method. Western blot analysis displayed that the antibodyhad high specificity. ELISA analysis confirmed that the titer for the antibody reached 1∶16 000.Conclusion:Thepolyclonal antibody against ADAM28 product with high titer is successfully prepared,it may be used for further studyof the role and expression of ADAM28 during tooth development.

Blood Cell Count ; Bone Marrow Cells ; pathology ; Child ; Cytokines ; analysis ; Fever ; Histiocytosis, Non-Langerhans-Cell ; metabolism ; pathology ; therapy ; Humans ; Interleukin-2 ; analysis ; Interleukin-6 ; analysis ; Receptors, Interleukin-1 ; analysis

Congresses as Topic ; Otorhinolaryngologic Surgical Procedures ; Rhinitis ; surgery ; Skull Base ; surgery

Objective:To investigate spatiotemporal expression of ADAM28 in mouse tooth germ development.Methods:Immunohistochemistry and image analysis technique were used to observe the expressions of ADAM28 at mouse tooth germ development stages.Results:Different expression levels of ADAM28 at tooth germ development stages were observed.At cap stage,ADAM28 was found strongly positive in oral epithelial,stellate reticulum cells of enamel organ,basement membrane,dental papilla cells and dental sac cells.At late bell stage,positive staining was found in ameloblasts,enamel matrix,epithelial root sheath and dental papilla cells.At crown and root development stage,positive staining for ADAM28 was detected in ameloblasts,odontoblasts,cementoblasts,epithelial root sheath,dental papilla cells and dental sac cells.Conclusion:ADAM28 participates in crown and root morphogenesis process ranging from bud stage to late bell stage and from matrix secretion to sclerous tissue formation.It might play an important role in early formation,proliferation and differentiation of odontogenic mesenchymal cells.

0.05 ); but rate of skin rash was increased in the patients with amoxicillin (P

Objective To investigate the effects of miR-19 on the migration ability of lung adenocarcinoma cell line A549. Methods The expressions of miR-19 in lung epithelial cell line BEAS-2B and lung adenocarcinoma cell line A549-Luc were detected by qRT-PCR.The A549-Luc cell line which over-expressed miR-19 was established. The expression levels of miR-19 in A549/RFP+/H2B and A549/RFP+/m19 were identified by qRT-PCR. The morphology of A549/RFP+/m19 was observed,and the migration ability of A549/RFP+/m19 was detected by transwell migration assay. Results The expression levels of miR-19 differed significantly between BEAS-2B cells and A549-Luc cells (t = -20.954, P < 0.001). The lung adenocarcinoma cell line A549/RFP+/m19 which over-expressed miR-19 was successfully established. Changes in A549/RFP+/m19 cell morphology were found. As compared with A549/RFP+/H2B cells, A549/RFP+/m19 had an increased migration ability (P <0.01). Conclusions miR-19 enhances the migration ability of lung adenocarcinoma A549-Luc cells.

Adult ; Drowning ; Humans ; Hydrogen Sulfide ; poisoning ; Male ; Radiography, Thoracic ; X-Ray Film ; Young Adult

Protein tyrosine phosphatase (PTP) 1B is a potential target for the treatment of diabetes and obesity. We have previously identified the benzoyl sulfathiazole derivative II as a non-competitive PTP1B inhibitor with in vivo insulin sensitizing effects. Preliminary SAR study on this compound series has been carried out herein, and thirteen new compounds have been designed and synthesized. Among them, compound 10 exhibited potent inhibition against human recombinant PTP1B with the IC50 value of 3.97 micromol x L(-1), and is comparable to that of compound II.
Humans ; Protein Tyrosine Phosphatase, Non-Receptor Type 1 ; antagonists & inhibitors ; Structure-Activity Relationship ; Sulfathiazoles ; chemistry ; pharmacology