ABSTRACT
Objective to investigate the correlation between glutathione S- transferase gene M1,t1 and P1(GStM1,GStt1 and GStP1)poly-morphism and sperm DNA fragmentation index(DFI)in male patients with idiopathic infertile. Methods the study included 246 male patients with idiopathic infertility. Polymerase chain reaction(PCR)and polymerase chain reaction restriction fragment length polymorphism(PCR-RFLP) were used to identify the genotype of GStM1,GStt1 and GStP1,respectively. Sperm DFI was analyzed by flow cytometry with acridine orange staining. Results the sperm DFI was significantly higher in GStt1 gene null type group than in GStt1 gene wild type group(P 0.05). Conclusion GStt1 gene deletion was positive associated with the sperm DFI in male idiopathic infertile patients.
ABSTRACT
The signal transduction pathways within corporal smooth muscle cells are the intracellular molecular mechanisms of corporal smooth muscle tone regulation. Various neurotransmitters activate the membrane receptor proteins or intracellular enzyme pathways and result in the production of extracellular chemical signals. Second messenger molecules and ions transmit and amplify the signals, and subsequently induce the relaxation of smooth muscle cells and penile erection. Therefore, the study of signal transduction in cavernous smooth muscle play an important role in understanding the physiology of erection and the pathophysiology of erectile dysfunction as well as in developing new selective drugs for the treatment of erectile dysfunction.
Subject(s)
Humans , Male , Calcium , Metabolism , Muscle, Smooth , Metabolism , Myosin-Light-Chain Kinase , Physiology , Penis , Metabolism , Signal Transduction , PhysiologyABSTRACT
The regulation of vascular and trabecular smooth muscle relaxation or contraction in the penis, that is, the physiology of corporal smooth muscle tone, determines penile erection or flaccidity. There is considerable evidence that the potassium channel and calcium channel, like many other vascular tissues, are the major modulators of smooth muscle tone in the corpora. Moreover, data on cultured corporal smooth muscle cells and isolated corporal tissue strips have demonstrated that the neurotransmitters participating in erection modulate corporal smooth muscle tone largely through their effects on ionic channels and transmembrane ionic flux.
Subject(s)
Humans , Male , Cell Line , Ion Channels , Physiology , Muscle Contraction , Physiology , Muscle, Smooth , Cell Biology , Physiology , Penis , Cell Biology , Physiology , Potassium Channels , Physiology , Sodium Channels , PhysiologyABSTRACT
Objective To study the relationship between the expression of ICAM-1,HLA-DR in the renal allograft of chronic rejection. Methods The expression of ICAM-1 and HLA-DR was assessed in 20 cadaveric renal allografts with chronic rejection using immunohistological techniqu(ABC method). Results In the renal allograft with chronic rejection,the expression of ICAM-1 was increased on the tubular epithelial cells and interstitial microvascullar endothelium,whereas the expression of HLA-DR was up-regulated,especially on the distal tubules. In addition, the expression of ICAM-1 and HLA-DR was associated with lymphcytes infiltration in the local perivascullar and intertubular structure. Conclusions It is suggested that the increased ICAM-1 and HLA-DR expressions might mediate allograft injury and have a role in the augmentation of the response,either in its induction,especially in the interstitial lymphocytes infiltration and antigen presenting or as a target for the effector arm of the reaction.
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Objective To study the clinical and pathological features of adrenal myelolipoma. Methods The clinical manifestration,experimental and imaging data of 6 patients with adrenal myelolipoma were retrospectively analyzed. Results The disease manifested nonspecific symptoms and signs,including faint lumber,flank or bulk pain.The diagnosis of adrenal myelolipoma depends on B ultrosound scan,CT and MRI,revealing a fatty mass with various other densities such as soft tissue,intratumoural haemorrhage,calcification and residual adrenal cortex.Tumor excision and adrenalectomy were performed in all patients.The pathological examination showed that the tumor consists of mature fat cells and hematopoietic elements.The patients have been asymptomatic on following up for 0.5～7 years and there is no recurrence of tumor. Conclusions CT and MRI images features are helpful for the pre operative diagnosis of adrenal myelolipoma.Pathologically,it is characterized by a mixture of mature fat and hematopoietic elements.
ABSTRACT
To study the mechanism of human chronic renal allograft rejection, kidney tissues were taken from 16 patients with chronic renal allograft rejection and from 5 healthy subjects, and underwent the frazed section staining for ICAM-1 and VCAM-1 to anti-ICAM-1 and anti-VCAM-1 respectively by using immunohistochemistry(ABC).The results showed that there were differ-ent distribution of ICAM-1 and VCAM-1 expression in nomal kidney and renal allograft during chronic rejection.It was suggested that ICAM-1 and VCAM-1 might play an important role in the pathogenesis of human chronic renal allograft rejection.
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Objective To construct a recombinant AAV reporter virus expressing GFP and observe its expression in NIH 3T3 cell. Methods The resulting gene of GFP was subcloned into the site EcoRⅠand BamHⅠof vector pssHGCMV, and a recombinant adeno-associated virus (rAAV) vector pssHGCMV-GFP expressing GFP was constructed by using DNA recombinant technique. The 143 cells were transfected with the vector and the rAAV stock expressing GFP was packaged, produced and purified. The titre of the rAAV stock was measured by quantitative dot blot hybridization. NIH 3T3 cells were infected with the rAAV and the fluorescence was detected in alive cells to confirm successful infection and the expression of exogenous gene in NIH 3T3 cell line. Results A GFP-expressing rAAV vector VssCMV-GFP was successfully constructed. The titer of the VssCMV-GFP was 3.16?10~(12) particles/mL. GFP was initially expressed in the NIH 3T3 cells 48h following infected by VssCMV-GFP and subsequently it gradually increased. The green fluorescence in the cells was the most apparent 120h after infected. Conclusion VssCMV-GFP can infect the eukaryotic cells and GFP can be expressed in the alive cells.It is suggested that rAAV-mediated transfer of the gene to the eukaryotic cells can serve as a delivery system of gene therapy.