There are many type Ⅱ toxin-antitoxin(TA) systems in Mycobacterium tuberculosis(Mtb), among which the VapBC family is the most abundant TA system including toxin VapCs and antitoxin VapB. Toxin VapCs are usually ribonucleases(RNases) with a PilT N-terminal(PIN) domain that can cleave tRNA or sarcin-ricin loop(SRL) of 23S rRNA to exert the toxicity. Antitoxin VapB regulates the expression level of homologous toxins by binding to promoter DNA or directly binds to homologous toxins to inhibit their toxicity. The VapBC family is closely associated with the growth, pathogenicity and drug resistance of Mtb. Therefore, the function of Mtb VapBC family, substrate specificity of toxin VapCs, structures of VapBC,and structure-based drug development were summarized in this paper, in view to providing new ideas for the treatment of tuberculosis(TB).

Humans ; Occupational Diseases ; diagnosis

Objective To explore the different characteristics of tumor recurrence after liver transplantation (LT)and hepatectomy(HC)in patients with hepatocellular carcinoma(HCC).Methods The literatures about tumor recurrence of HCC after LT and HC were reviewed and their characteristics were compared.Results There are distinctions of recurrence rates,time,common sites between the recurred tumors after LT and HC,and their correlation factors and mechanisms of recurrence are also different.Conclusion Preventive measures should be strengthened and treatments should be more targeted according to the different characteristics of tumor recurrence after LT and HC to improve postoperative life quality and increase the survival rate.

Falling in the elderly is a major health problem and may cause severe consequences. Fall risk assessment is important for preventing and intervening fall incidence. Inertial Measurement Unit (IMU) has been introduced to evaluate motion/balance function and fall risk among the older people. Some researches indicated that it might have advantages over the usual tools, and can be used in the hospitals, communities, nursing homes, etc. IMU is a good way to measure gait variability, which may be strongly related with the risk of falls.

Breast Neoplasms ; pathology ; surgery ; Carcinoma, Ductal, Breast ; pathology ; surgery ; Cryoultramicrotomy ; Cytodiagnosis ; methods ; Female ; Histocytological Preparation Techniques ; methods ; Humans ; Intraoperative Care ; methods ; Precancerous Conditions ; pathology ; surgery

To explore the effects of angiotensin Ⅱ on plasminogen activator inhibitor 1 (PAI 1) gene expression in human glomerular mesangial cells.Glomerular mesangial cells (GMCs) were cultured from a healthy adult human kidney (unsuitable for renal transplantation) and then treated with angiotensin Ⅱ at concentration of 10 -9 ,10 -8 , 10 -7 and 10 -6 mol/L, respectively. The mRNA expressions of angiotensinⅡAT1 and AT2 receptor, and PAI I were examined with RT PCR and Northern blot analysis, respectively. Plasminogen activator activity in the supernatants of the GMCs was measured with fibrin plate method. After the GMCs were stimulated by angiotensin Ⅱ, the mRNA level of the AT1 receptor was markedly enhanced, but the AT2 receptor mRNA level was still undetectable as that in normal condition. When GMCs were treated with angiotensin Ⅱ for 48 hours, PAI 1 mRNA expression was increased in a dose dependent manner. The plasminogen activator activity was significantly reduced in the supernatants of the angiotensinⅡ treated GMCs. the results suggested that angiotensinⅡ promote PAI 1 gene expression of the GMCs possibly through its AT1 receptor.

0.05),the odds ratio(OR)being 0.873,[95% confidential interval(CI):0.428～1.782].(3)The relationship between ischemic stroke and the risk factors was illuminated by the Logistic Regression analysis.The results showed that there was no significant difference of the positive rate of IgA antibody between the case group and control group.Conclusion There may be not relationship between CP IgA antibody and ischemic stroke.There is no relationship between IgA CP antibody and the other risk factors of ischemic stroke.

[ Objective ] To observe the effects of acupuncture in treating extraweight rats and on morphology of brown adipocytes. [ Methods ] Sixty SD rats were randomized into normal group ( group A), model group ( group B) and acupuncture group (group C). Group A was fed with common forage and groups B and C with high-fat diet for 12 weeks. After then group C was given acupuncture of Zusanli (ST36) and Neiting (ST44) points for 15 days. Body weight, body length and Lee's index were compared before and after treatment in the three groups; wet weight of perirenal fat was detected and the ultrastructure of interscapular brown adipose tissue was observed under transmission electron microscope after treatment. [Results] After treatment, body weight, Lee's index and wet weight of perirenal fat were decreased in group C (P

Foreign Bodies ; complications ; diagnosis ; Glottis ; Hoarseness ; diagnosis ; etiology ; Humans ; Male ; Middle Aged