OBJECTIVE: To establish a method for determination of the contents of puerarin in infant Fuxieling effervescent granules with HPLC.METHODS:The puerarin was extracted by ultrasonics, using methanol as solvate.The stratographic column was Shim - Pack C1s with acetonitrile - water( 10: 90) as mobile phase. The flow rate was 2.0ml/min and the detecting wavelenghth was 250nm.The temperature of column was 25℃ .RESULTS:The resolution between the puerarin and the adjacent peaks was ＞1.5 .The number of theoretical plates was 18 550 .The standard curve was linear in the range of 0.964μg～7. 712μg .The average recovery was 100.2% (RSD = 1.76%, n = 6).CONCLUSION:The method is simple, rapid and accurate. It can be used for quality control of the preparation.

Objective To investigate the role of ATP￣binding cassette ( ABC ) family on the resistance of nasopharyngeal carcinoma (NPC) stem cells (CSCs) to cisplatin. Methods We compared the differences between the drug extravasation capability of CNE￣2 and CNE￣2S by using Rhodamine￣123 efflux assay. We determined the mRNA and protein expression levels of ABC transport family members, including ABCA3,ABCB1,ABCB5,ABCC1,ABCC2 and ABCG2,after 48 h being treated with 1 μmol.L-1 cisplatin by RT￣PC and Western blotting.Rhoamine￣123 efflux and apoptosis by cisplatin in two kinds of cells was examined by ABCA3 gene silencing with specific small￣interfering RNA. Results The IC50 of cisplatin on CNE￣2S was 4.1 fold to that on CNE￣2(P<0.05).For the relative drug effluent activity and Na+K+ ATPase activity,CNE￣2S was 4.8 fold to CNE￣2(P<0.05),suggested that CNE￣2S expressed more ABCA3,ABCB1,ABCC1 and ABCG2 in comparison to CNE￣2(P<0.05).After 48 h treatment with 1 μmol.L-1 cisplatin,ABCA3 specifically highly expressed in CNE￣2S (P<0.05), and knocking down of ABCA3 resulted in reduction of rhodamine￣123 efflux and increase of apoptosis. Conclusion The cisplatin resistance of NPC CSCs is associated with enhanced expression of ABCA3,ABCC1 and ABCG2, suppression of ABCA3 could reverse the resistance of NPC CSCs to cisplatin.

Objective:To know about the prevalence of depression,anxiety,and suicidal behaviors among newly diagnosed HIV-positive men who have sex with men.Methods:A cross-sectional study with a consecutive sample was conducted in the HIV/AIDS Voluntary Counseling and Testing Clinic of the Center for Disease Control and Prevention.A standard set of questionnaires,namely,the Patient Health Questionnaire Depression Scale (PHQ9),Generalized Anxiety Disorder Scale (GAD-7),and a self-designed suicidal behavior questionnaire were used to assess the subjects'emotional problems.Results:Among 321 newly diagnosed HIV-positive men who had sex with men,the positive rate of depression and anxiety were 41.1％ (132/321) and 31.5％ (101/321),respectively.The rate suicidal ideation after HIV diagnosis was 27.7％ (89/321).Individuals who were living with others,had HIV related clinical symptoms,higher HIV/AIDS related stress,and lower social support were more likely to have positive depressive symptoms.Individuals who were unmarried,had lower HIV/AIDS related stress,and lower social support were more likely to have positive anxiety.The prevalence of suicidal ideation after HIV diagnosis was higher among individuals who were unwilling to join in HIV/AIDS support groups,had HIV related clinical symptoms,higher HIV/AIDS related stress,lower social support,and both positive depression and anxiety symptoms.Conclusion:The prevalence of emotional problems is high among newly diagnosed HIV-positive men who have sex with men.It is warranted to promote mental health service for this vulnerable group.

Based on the requirements of military professional education reform and in view of the problems existing in the operation and maintenance of first-aid medical equipment in grass-roots forces. We put forward a construction scheme of online course which named operation and maintenance of first-aid medical equipment in grass-roots forces, and then expound the scheme from teaching content construction and teaching mode construction. The teaching content construction consists of two parts: the management theory of conventional medical equipments and the operation and maintenance teaching of specific first-aid medical equipments. In the construction of teaching mode, we elaborate on the organization forms of teaching, answering questions, training and examination units in detail. The design scheme of the online course is in line with the learning characteristics and meets the demand of learning the knowledge of the operation and maintenance of first-aid medical equipment systematically, so as to improve the post competency of the grass-roots forces.

Sudden sensorineural hearing loss (SSNHL) refers to the sudden and unexplained sensorineural hearing loss within 72 h and a decrease in hearing of ≥30 dB affecting at least 3 consecutive frequencies. It is one of the common emergencies in neurology and otolaryngology. Early etiological evaluation and systematic and targeted treatment are very important for delaying the progression of SSNHL and restoring hearing. Recent studies have shown that SSNHL overlaps with vascular risk factors of ischemic stroke, and may predict the risk of ischemic stroke. SSNHL may be one of the clinical manifestation and even the prodromal symptoms of ischemic stroke, especially the infarction of the blood supply area of the anterior inferior cerebellar artery or its branch internal auditory artery. Although these factors can not fully reveal the relationship between SSNHL and ischemic stroke, they are enough to warn clinicians that they should consider the possibility of ischemic stroke when receiving patients with SSNHL. Screening of vascular risk factors for patients with SSNHL as early as possible is helpful to avoid the risk of recurrence of ischemic stroke.

Based on the analysis of the existing problems and implementation dilemmas in family doctor contracting and first-return-visits faced by primary medical institutions in China, the authors propose countermeasures to provide reference for managers of primary health care institutions.