AIM:To investigate the protective effect of lycopene on primary mouse cerebrocortical neurons ex -posed to tert-butyl hydroperoxide ( t-BHP) and its mechanisms of in vitro.METHODS:Primary cerebrocortical neurons of newborn C57 mice were extracted and divided into normal group , t-BHP group, lycopene +t-BHP group and lycopene group.The neuronal damage was induced by t-BHP exposure for 24 h, and the cell viability was examined by MTT assay . ROS content was measured by flow cytometry , and the protein levels of Bax , Bcl-2, caspase-3, cleaved caspase-3 and cyto-chrome C were examined by Western blot .RESULTS:The primary mouse cortical neurons expressed MAP-2 protein.Ly-copene at concentration of 4μmol/L reversed the decrease in cell viability .Flow cytometry revealed that lycopene treatment attenuated ROS content under the condition of t-BHP exposure.In addition, the protein level of Bcl-2 was increased, and the expression of Bax , cleaved caspase-3 and cytochrome-C was suppressed in lycopene +t-BHP group.CONCLUSION:The protective effect of lycopene on cortical neurons with t-BHP-induced injury may be involved in the mechanism of neuro-nal antioxidative response by down-regulating caspase-3 and Bax/Bcl-2 through the mitochondrial apoptotic pathway .

Objective To evaluate the knowledge,attitude and practice(KAP)related with AIDS of local floating population.Methods A total of 1 942 floating persons were sampled by multistage cluster sampling and interviewed with questionnaire in the agricultural markets,construction sites,and their habitats within 3 communities in Hongkou District.Results 82.9% of the interviewees were 20 ～49 years old.The average score was 34.77 ±3.52 (maximum score is 44)for knowledge,12.11 ±2.32(maximum score is 19)for attitude,5.50 ±0.95(maximum score is 7)for practice,respectively.The scores increased with educational level significantly.The scores of knowledge were 33.26 ±3.54,34.63 ±3.23,36.56 ±3.39 among the subjects with educational levels of primary school and below,junior high school,senior high school and above.The scores of attitude were 13.77 ±2.27,14.79 ±2.39,15.62 ±2.38,respectively.And the score of practice was 5.40 ±0.90,5.51 ±0.93,5.58 ±1.03,respectively.Conclusion In the present,the KAP relating AIDS of local floating population is poor in Hongkou District.A variety of intervention methods and operational patterns should be developed for the floating population with different educational levels and jobs.

AIM:To establish a mouse model of immuno-inflammation in central nervous system (CNS) associated with cognitive dysfunction.METHODS:C57BL/6J male mice were divided into 3 groups.Lipopolysaccharide (LPS) was intraperitoneally injected into the mice to induce cognitive impairment.Morris water maze test, passive avoidance test and pole test were used to observe the behavioral changes of mice.The histomorphology was analyzed by the method of immunofluorescence.The detailed molecular mechanism was determined by Western blot.RESULTS:Compared with saline group, LPS induced mouse sickness behavior and memory loss.Microglia activation and neuronal loss in the hippocampus were observed.The expression of neuroinflammatory proteins COX-2 and iNOS in the brain of LPS-induced mice was increased.CONCLUSION:Intraperitoneal injection of LPS induces cognitive dysfunction in mice.

Objective To explore the application of change speed of lithotomy position in the patients with gynecological laparoscopic surgery.Methods A total of 120 gynecological laparoscopic surgery patients in our hospital were randomly divided into observation group and control group,pneumoperitoneum pressure of two groups was 11 mmHg.The change speed of lithotomy position in the control group was in 6 s,the observation group was ＞ 30 s,and the changes of hemodynamics and blood gas indexes were compared.Results SBP and DBP after pneumoperitoneum in the two groups were increased compared with that before pneumoperitoneum (P ＜ 0.05).The increase of DBP and SBP after pneumoperitoneum in the observation group was less than that in the control group (P ＜ 0.05).PETCO2 after pneumoperitoneum in the observation group showed no statistically significant compared with pneumoperitoneum before (P ＞ 0.05),but the control group had higher PETCO2 than that before pneumoperitoneum,there were statistically significant differences (P ＜ 0.05).The observation group and the control group had a tendency to rise in airway pressure after pneumoperitoneum,but no statistical significance between the two groups was found (P ＞ 0.05).Conclusion Prolonging change time of lithotomy position can reduce the influence of hemodynamics for the patients with gynecological laparoscopic operation,and it is beneficial to the recovery of lung function.

Objective To explore the application of change speed of lithotomy position in the patients with gynecological laparoscopic surgery.Methods A total of 120 gynecological laparoscopic surgery patients in our hospital were randomly divided into observation group and control group,pneumoperitoneum pressure of two groups was 11 mmHg.The change speed of lithotomy position in the control group was in 6 s,the observation group was ＞ 30 s,and the changes of hemodynamics and blood gas indexes were compared.Results SBP and DBP after pneumoperitoneum in the two groups were increased compared with that before pneumoperitoneum (P ＜ 0.05).The increase of DBP and SBP after pneumoperitoneum in the observation group was less than that in the control group (P ＜ 0.05).PETCO2 after pneumoperitoneum in the observation group showed no statistically significant compared with pneumoperitoneum before (P ＞ 0.05),but the control group had higher PETCO2 than that before pneumoperitoneum,there were statistically significant differences (P ＜ 0.05).The observation group and the control group had a tendency to rise in airway pressure after pneumoperitoneum,but no statistical significance between the two groups was found (P ＞ 0.05).Conclusion Prolonging change time of lithotomy position can reduce the influence of hemodynamics for the patients with gynecological laparoscopic operation,and it is beneficial to the recovery of lung function.

Objective To investigate the level of deltamethrin resistance and mutation sites in the sodium iron channel gene in Rhipicephalus microplus in Huaihua City, Hunan Province, and to examine the correlation between deltamethrin resistance and mutation sites in the sodium iron channel gene in Rh. microplus. Methods Rh. microplus was sampled from multiple yellow cattle farms in Huaihua City, Hunan Province from June to September 2022, and the level of resistance to deltamethrin was determined in ticks using the adult immersion test. The sodium iron channel domain III gene was amplified in deltamethrin-resistant and wild-type Rh. microplus using PCR assay. Following sequencing and sequence alignment, mutation sites were detected in bases. The sodium iron channel domain III gene in Rh. microplus was translated, and the signal peptide, transmembrane domain, and phosphorylation and glycosylation sites were detected in amino acid sequences. The tertiary structures of the sodium iron channel domain III protein of deltamethrin-resistant and wild-type Rh. microplus were deduced and compared, and the association be tween mutation sites in bases and resistance to deltamethrin was examined in Rh. microplus according the level of deltamethrin resistance, sequence alignment and protein tertiary structure. Results The median (LC₅₀) and 95% lethal concentrations (LC₉₅) of deltamethrin were 121.39 mg/L and 952.61 mg/L against Rh. microplus, with a resistance factor of 9.24 and level II resistance. The sequence of the sodium ion channel domain III gene was 1 010 bp in size, and mutation sites were detected in two neighboring bases in the sequence of the sodium ion channel domain III gene in deltamethrin-resistant Rh. microplus. Although no signal peptides were found in the sodium iron channel domain III protein of deltamethrin-resistant or wild-type Rh. microplus, 6 trans-membrane domains, 42 phosphorylation sites and 8 glycosylation sites were identified, with a significant difference in the tertiary structure of the sodium iron channel domain III protein between deltamethrin-resistant and wild-type Rh. microplus. Conclusions Level II resistance to deltamethrin is detected in Rh. microplus in Huaihua City, Hunan Province, and two mutation sites that correlate with the emergence of deltamethrin resistance are identified in the sequence of the sodium iron channel domain III gene in deltamethrin-resistant Rh. microplus.