Abstract: This study is to elucidate the metabolic pathway of 1,2-[bis (1,2-benzisoselenazolone-3 (2H)-ketone)]-ethane (BBSKE) in rats. Rats were administrated with a single dose of BBSKE 200 mg x kg(-1). The metabolites in rat urine, feces, bile and plasma were identified by LC-MSn analysis. The characterization of fragment ions from LC-MSn chromatography and mass spectrometry was applied to the investigation of structures of metabolites. Three phase I metabolites were detected in rat urine and feces. Two of them were also found in plasma and one existed in bile. These products were derived from oxidized, methylated and S-methylated BBSKE, separately. One phase II glucuronide of BBSKE was also found in bile. Therefore, it is possible that BBSKE was metabolized by oxidization, methylation and glucuronidation.

Aim To explore the effect of survivin in PC12 cells against injuries induced by cobalt chloride(CoCl_2).Methods PC12 cells were exposed to CoCl_2 at different doses in different time to set up the chemical hypoxia induced PC12 cells injuries model.Cell viability was tested by using cell counter kit-8.Dose-effect(200～1 000 μmol·L~(-1))and time-effect(0～48 h)relationship between hypoxia induced by CoCl_2 and the expression of survivin was evaluated by western blot.Results PC12 cells viability was inhibited significantly by CoCl_2 in a dose and time dependent manners;At the concentrations from 200 to 600 μmol·L~(-1) CoCl_2 for 24 h,survivin expression was upregulated in a dose dependent manner,peaking at 600 μmol·L~(-1) CoCl_2 treatment,exceeding this concentration of CoCl_2,with dose increasing,survivin expression decreased.At the dose of CoCl_2 up to 1 000 μmol·L~(-1),survivin did not express basically;Treatment with 600 μmol·L~(-1) CoCl_2 in different time,within the range of 0～36 h,the expression of survivin enhanced in time dependent manner.But with the extension of time,survivin expression was declining; 17-allylamino-17-demethoxygeldanamycin (2 μmol·L~(-1)),an inhibitor of Hsp90,not only decreased survivin overexpression but also obviously enhanced the injuries of PC12 cells induced by CoCl_2,which didn't damage PC12 cells alone.Conclusion Upregulation of survivin expression may be one of the endogenous defense mechanisms for PC12 cells against chemical hypoxia.

[Objective] To explore the cytoprotecfion of hydrogen sulfide (H_2S) against cobalt chloride (CoCl_2)-induced apeptosis in PC12 cells and the underlying mechanisms. [Methods] CoCl_2 (a chemical hypoxia-mimetic agent) was used to establish the chemical hypoxia-induced PC12 cell injuries model. Sodium hydrosulfide (NaHS) was used as a H_2S donor. The viability of PC12 cells was measured by CCK-8 assay. The percentage of apeptotic cells was assessed by propidium iodide stain flow cytometry (FCM). The morphological change of apeptotic cells was tested by using the chromatin dye Hoechst 33258. The mitochondrial membrane potential (MMP) was analyzed by rhodamine 123 staining and photofluorography. The level of reactive oxygen species (ROS) in PC12 cells was measured by DCFH-DA staining and photofluorography. [Results] CoCl_2 induced a decrease in cell viability and an increase in percentage of apeptosis in PC12 cells along with dissipation of MMP as well as overproduction of ROS. When PC12 cells were treated with Naris 30 min before CoCl_2 treatment a decrease in viability of PC12 cells induced by 600 μmol/L CoCl_2 was concentration-dependently blocked by NaHs (100, 200, and 400 μmol/L). Pretreatment with NaHS at 200 and 400 μmol/L obviously reduced the apepetotic percentage of PC12 cells induced by 600 μmol/L CoCl_2 and inhibited the dissipation of MMP and overproduction of ROS. [Conclusion] H_2S protected PC12 cells against CoCl_2-induced apeptosis, which may be associated with the inhibition of H_2S on the dissipation of MMP and overproduction of ROS induced by CoCl_2.

Objective To estimate the influences of N-acetyl cysteine (NAC) on a chemical hypoxiamimetic agent CoCl2 induced-injury to, and expressions of inflammatory factors by, an immortal human skin keratinocyte line HaCaT. Methods HaCaT cells were treated with CoCl2 of 2000 μmol/L for 4 hours to set up a chemical hypoxia-induced cell model of skin injury. NAC of various concentrations ( 1000, 2000, 3000 μmol/L)was used to pretreat HaCaT cells for 2 hours prior to the establishment of cell model. After these treatments,cell viability was detected by cell counting kit 8 (CCK-8), the levels of interleukin 6 and 8 (IL-6 and -8) and tumor necrosis factor α (TNF-α) in culture supernatant by ELISA kits, mitochondrial membrane potential (MMP) by rhodamine 123 (Rh123) staining and photofluorography, intracellular reduced glutathione (GSH)content by glutathione detection kit. Results An obvious decline was observed in HaCaT cell viability after pretreatment with various concentrations of NAC for 2 hours. The treatment with CoCl2 of 2000 μmol/L for 4 hours induced an elevation in the supernatant levels of IL-6, IL-8 and TNF-α and a decrease in GSH content and MMP, while the pretreatment with NAC for 2 hours retarded the CoCl2-induced increase in IL-6 and IL-8 levels as well as decrease in GSH content and MMP. Conclusion The reactive oxygen species (ROS) scavenger NAC can protect against CoCl2-induced injury to and inflammatory reaction in HaCaT cells, which may be associated with a decrement in oxidative stress.

Objective The clinical data of postoperative perirenal hematoma after renal biopsy in recent 10 years were retrospectively analyzed,and its relationship with pathological type was explored.Methods From April 2003 to April 2013,2062 patients of renal biopsy were enrolled and divided into 3 groups:youth group (18-39 years,1634 cases),middle age group (40-59 years,323 cases) and aged group (≥60 years,105 cases).Relationship between renal hematoma and pathology was analyzed.Results There were 1370,255,69 cases of primary glomerular disease respectively in 3 groups,and 264,68,36 cases of secondary glomerular diseases.Three hundred and seventy-nine in all patients were complicated with perirenal hematoma,and the incidence rates were 15.8％ (325/2062),1.8％ (37/2062),0.8％ (17/2062) respectively.Incidence rate of hematoma in primary glomerular disease was higher than that in secondary diseases [19.0％ (322/1694) vs.15.5％ (57/368)].Three most common primary glomerular disease in which perirenal hematoma occured was IgA nephropathy 7.4％ (126/1694),focal/segmental lesions 4.2％(71/1694) and membranous nephropathy 2.4％ (41/1694); while the incidence rate of lupus nephritis hematoma was as high as 9.0％ (33/368).Conclusion Single-center data shows that the most common pathology types of perirenal hematoma are lupus nephritis,IgA nephropathy,focal/segmental lesions and membranous nephropathy.

Aim To research dynamically the changes of endogenous cystathionine- β-synthase/hydrogen sul-fide system in PC12 cells injury induced by rotenone. Methods Rotenone-induced injury in PC12 cells ( characteristic of dopaminergic neurons) was used as a PD cell model. The expression of CBS was evaluated by Western blot. Intracellular CBS activity and H2 S production were detected by Methylene blue spectro-phot-ometric method. The viability of PC12 cells was measured by CCK-8 assay. GSH detection kit was used to detect the intracellular GSH content. Results In the groups of 6 and 12 hours, the expression and activ-ity of CBS were elevated, and the production of H2 S was increased. In the groups of 24 and 48 hours, CBS expression and activity were significantly decreased, and the amount of H2 S was significantly reduced. Ap-plication of 1. 5 μmol·L-1 rotenone for different time (6-48h) could decrease the cell viability and intra-cellular GSH contents in a time-dependent manner. Conclusions The expression and activity of endoge-nous CBS, stimulated by rotenone, are elevated firstly and then decreased. The generation of H2 S, stimulated by rotenone, is increased and then reduced significant-ly, which may be related to PC12 cells against oxida-tive stress damage induced by rotenone.

Aim To explore the effect of chemical hypoxia-mimetic agent,cobalt chloride(CoCl2)on inflammatory reaction in human keratinocytes(HaCat cells).Methods After HaCat cells were treated with CoCl2 at different concentrations to set up a chemical hypoxia-induced cell model of skin injury,cell viability,intracellular reactive oxygen species(ROS),mitochondrial membrane potential(MMP),the levels of both interleukin 6(IL-6)and interleukin 8(IL-8)as well as the expression of heme oxygenase-1(HO-1)were detected.Results The viability of HaCat cells was reduced by CoCl2 at the concentrations from 500 to 3 000 ?mol?L-1,and the higher CoCl2 doses,the lower cell viability was.CoCl2 induced oxidative stress reaction(increasing ROS production and decreasing MMP).CoCl2 induced inflammatory reaction,enhancing the release of IL-6 and IL-8.CoCl2 at concentrations from 1 000 to 3 000 ?mol?L-1 upregulated HO-1 expression in HaCat cells.Conclusion CoCl2 induces not only oxidative stress,but also inflammatory reaction,increasing the release of both IL-6 and IL-8,as well as HO-1 expression.

Aim To explore the role of heat shock protein 90(Hsp90)in hydrogen sulfide-induced protection against PC12 cells injuries elicited by cobalt chloride(CoCl_2).Methods Hydrogen sulfide preconditioning against CoCl_2-induced injury model was set up in PC12 cells.Cell viability was tested by using cell counter kit-8.Morphological changes in apoptotic PC12 cells were detected by Hoechst 33258 staining and photofluorography.Apoptotic rate was evaluated by propidium iodide(PI)staining and flow cytometry(FCM).The expression of Hsp90 was evaluated by Western blot.Results Hsp90 expression was upregulated after treatment with 400 μmol·L~(-1) sodium hydrosulfide(a H_2S donor),peaking at 3 h,returning to the basal level at 24 h.Furthermore,H_2S preconditioning obviously enhanced the upregulation of Hsp90 expression induced by CoCl_2.H_2S preconditioning markedly protected PC12 cells against injuries induced by CoCl_2,increasing the viability of cells and decreasing the percentage of apoptotic cells.17-allylamino-17-demethoxygeldanamycin(17-AAG),an inhibitor of Hsp90,antagonized H_2S preconditioning-induced Hsp90 activation and the adaptive cytoprotection.Conclusion H_2S can protect PC12 cells against CoCl_2-induced injuries,and upregulating the expression of Hsp90 may be one of the mechanisms underlying cytoprotection induced by H_2S preconditioning.

OBJECTIVETo report two myelodysplatic syndromes (MDS) patients with t(3; 5) (q25; q34).

METHODSChromosome specimens were prepared by short-term culture of bone marrow cells. Karyotype analysis was performed by R banding technique, chromosome painting (fluorescence in situ hybridization, FISH) by using whole chromosome 3 and 5 probes in case 1.

RESULTSThe clinical and hematological findings were compatible with diagnosis of MDS. Karyotype analysis showed that both patients had identical t(3; 5) (q25; q34) translocation. A reciprocal translocation between chromosomes 3q and 5q was proved by FISH in one patient.

CONCLUSIONSt(3; 5) translocation is a rare chromosome abnormality specifically associated with MDS and frequently displays trilineage dysplasia. Chromosome painting technique is a reliable tool for detecting this translocation.

Adolescent ; Adult ; Antigens, CD ; analysis ; Chromosomes, Human, Pair 3 ; Chromosomes, Human, Pair 5 ; Humans ; In Situ Hybridization, Fluorescence ; methods ; Leukocytes, Mononuclear ; classification ; immunology ; Male ; Myelodysplastic Syndromes ; genetics ; physiopathology ; Translocation, Genetic

Objective: To understand the management of tuberculosis outbreaks in middle schools in Bijie City, and to put forward suggestions to improve the quality of tuberculosis epidemic situation in schools. Methods: A unified questionnaire was used to investigate the management of tuberculosis outbreaks in middle schools reported by tuberculosis information management system from August 27, 2018 to January 6, 2019 in Bijie City. Results: The screening rate of close contacts was 69.72%(99/142), which significantly varied by counties(P<0.01). The time from the date of diagnosis of patients to screening of close contacts by local CDC was 3(1-10.5) days. Rate of standardized management process for close contacts aged 15 years or older (0) was lower than that for close contacts aged younger than 15 years old (23.08%)(P<0.01). 3 462 close contacts were screened for TB symptom,and chest X-ray among those suspected individuals(process 1), and 2 439 close contacts were screened with TB symptom,PPD test,and chest X-ray among those suspected individuals or those with strong positive in PPD test(process 2). The detection rate of pulmonary tuberculosis in close contacts of Grade I was lower in Process 1 (28.89/100 000) than in Process 2 (328.00/100 000)(χ2=6.56, P=0.01). The latent infection rate of the first-class close contacts (6.39%) was higher than that of the second-class close contacts(1.93%)(χ2=54.86, P<0.01). Conclusion Management of tuberculosis outbreaks in middle schools in Bijie City in 2018 is effective and timely, but the standardization needs to be improved.