AIM:To investigate the type of chloride channel activated by cisplatin in poorly differentiated na -sopharyngeal carcinoma cells (CNE-2Z cells).METHODS:The technique of whole-cell patch-clamp was used to investi-gate the role of Ca 2+in the activation of cisplatin-activated chloride currents and to analyze the effect of hypertonic stress on these currents in CNE-2Z cells.RESULTS:Chloride currents were induced when the cells were exposed to the calcium -free cisplatin solution , showing the similar density to the currents induced by cisplatin with the presence of extracellular cal -cium.However , the latency and the peak time of cisplatin-activated currents in the absence of extracellular calcium were prolonged.The activation of cisplatin-activated chloride currents was insensitive to the depletion of intra-and extracellular calcium.Calcium channel antagonist nifedipine had no effect on the cisplatin -activated chloride currents , while hypertonic solution completely inhibited those currents .CONCLUSION:The cisplatin-activated chloride currents are independent on intra/extracellular calcium .The chloride channels activated by cisplatin are not calcium-activated chloride channels , but are probably volume-sensitive chloride channels .

Objective To understand the epidemiological characteristics and related risk factors on HIV,HBV infection of people from the southwest province of China and to provide basic data for the development of related strategies.Methods According to the information on current HIV epidemics,one township from the area was selected as the study field and all the adult population were surveyed using a questionnaire to collect social demographic data and information on infection-related factors.Results A total of 2 290 adults were investigated and data showed as follows:the average HIV infection rate as 7.9％,the average HBV infection rate as 3.1％,and the average HIV/HBV co-infection rate as 1.2％.As for HIV infection,people whose yearly family gross income between 1 000 and 3 000 Yuan (OR=0.28) or more than 5 000 Yuan (OR=0.14) were less likely to be infected with HIV than those people whose annual family gross income less than 1 000 Yuan.People with educational level of primary school and above were more likely to carry HIV than those who were illiterate (OR =3.28).People who had the history of migration were less likely to carry HIV than those who had not (OR=0.33).People who had the history of being drug abusers were more likely to infect HIV than those who had not (OR=46.32).People whose spouses had the history of using drugs were more likely to infect HIV than those who had not (OR=3.52).People whose spouses had been infected with HIV were more likely to infect HIV than those who had not (OR=9.56).As for HBV infection,people who had the history of migration were more likely to infect HBV (OR =2.48).As for HIV/HBV co-infection,people whose spouses had the history of HIV infection were more likely to infect HIV/HBV co-infection than others who did not have the history (OR=6.04).Conclusion There had been a serious HIV/AIDS epidemic in our study field.Other than taking measures as detection and vaccination on HBV,health education should be strengthened,together with measurements as needle exchange and methadone substitution therapy,to control the spread of AIDS.

BACKGROUND: Few studies have explored the modifications by family stress and male gender in the relationship between early exposure to traffic-related air pollution (TRAP) and allergic rhinitis (AR) risk in preschool children. METHODS: We conducted a case-control study of 388 children aged 2-4 years in Shenyang, China. These children AR were diagnosed by clinicians. By using measured concentrations from monitoring stations, we estimated the exposures of particulate matter less than 10 μm in diameter (PM RESULTS: The prevalence of AR in children aged 2-4 years (6.4%) was related to early TRAP exposure. With an IQR (20 μg/m CONCLUSIONS Family stress and male gender may increase the risk of AR in preschool children with early exposure to PM
Air Pollution/adverse effects* ; Case-Control Studies ; Child, Preschool ; China/epidemiology* ; Cities ; Family/psychology* ; Female ; Humans ; Male ; Prevalence ; Rhinitis, Allergic/epidemiology* ; Risk Factors ; Stress, Psychological/complications* ; Traffic-Related Pollution/adverse effects*