Objective To translate the fear-avoidance components scale(FACS)into Chinese and test its reliability and validity.Methods In September 2023,the Chinese version of the Fear-avoidance component scale(FACS)was translated from the English version with translation,back-translation,cultural adjustment and pre-experiment according to Brislin's translation-back-translation model,after having been granted the rights by the author of FACS in August 2023.In October 2023,with the convenience sampling method,402 patients with chronic musculoskeletal pain in a Grade IIIA hospital were selected as the trial subjects to test the reliability and validity of the Chinese version of FACS.Results A total of 376 patients with chronic musculoskeletal pain had completed the study.The Chinese version of FACS encompassed 2 dimensions with 18 items:fear-avoidance psychology(12 items)and fear-avoidance behaviour(6 items).The total Cronbach α coefficient of the scale was 0.907 with the split-half reliability at 0.836 and test-retest reliability at 0.895.The Cronbach α coefficients of the two dimensions were at 0.884 and 0.812,split-half reliability at 0.871 and 0.896 and the test-retest reliability at 0.808 and 0.921,respectively.The content validity index of the scale level was 0.935,with a range from 0.870 to 1.000 at the item level.The KMO value for exploratory factor analysis was at 0.909,the spherical test value at 3134.208(P<0.01)and the cumulative variance contribution rate at 66.514%.Confirmatory factor analysis indicated that the model fitted the data well.Conclusion The Chinese version of FACS exhibits good reliability and validity.It can serve as an effective tool in the assessment of fear-avoidance in the patients with chronic pain in China.

Purpose To explore the application of contrast-enhanced ultrasound in evaluating the local muscle microcirculation before and after acupuncture at Zusanli point in normal people.Materials and Methods A total of 72 healthy volunteers who visited the Department of Ultrasound,the Second Affiliated Hospital of Fujian Medical University from September 2018 to May 2020 were prospectively collected,all subjects performed ultrasound contrast before acupuncture,acupuncture with strongest deqi,and two hours after acupuncture to observe the blood flow perfusion of the microvessels in the tibialis anterior muscle.The pre-selected areas of interest the small arteries,muscle tissues and venules in the middle were analyzed to obtain the time-intensity curve and contrast transit time(CTTs)perfusion parameters.Needle sensation was evaluated using objective scoring criteria for acupuncture combined with moxibustion recipients.Gastrin,plasma gastrin,cholecystokinin,and secretin were measured in all subjects before acupuncture,when acupuncture had the strongest deqi,and two hours after acupuncture.Results ①CTTs of arterial-muscle,muscle-venous and arterial-venous of the tibialis anterior muscle at acupuncture with strongest deqi were significantly shorter than those at before acupuncture and two hours after acupuncture(all P<0.001),and there was no significant difference in CTTs before and after acupuncture and moxibustion(P>0.05);②when acupuncture deqi was strongest,serum gastrin,plasma prokinetics,cholecystokinin,and secretin were significantly increased compared with those before acupuncture and two hours after acupuncture,with statistically significant difference(all P<0.001),while there was no significant difference in these parameters between before acupuncture and two hours after acupuncture(P>0.05);③when acupuncture had the strongest deqi,there were positive correlations between gastrin,plasma prokinetic hormone,cholecystokinin,and secretin values and CTTs of arterial-muscle,muscle-venous,and arterial-venous(r=0.360-0.702,P<0.001).Conclusion Acupuncture of the Zusanli,when it gains the strongest deqi,can cause changes in the microcirculation around the skeletal muscle,leading to a significant shortening of CTTs,and also promotes the secretory function of the gastrointestinal tract.

Objective To investigate the detailed molecular mechanism of matrix stiffness regulating cell drug resistance. Methods Polyacrylamide hydrogels of soft substrate (10 kPa), hard substrate (38 kPa) and rigid substrate (57 kPa) with different matrix stiffness were configured to simulate the physical matrix stiffness at different stages of breast cancer in vivo. Results The cell proliferation rate of the hard substrate was significantly higher than that of the soft and rigid substrates. The intracellular endocytosis was significantly lower on the hard substrate. The YAP nucleus translocation increased significantly on the hard substrate, compared with the soft and the rigid substrates, indicating that YAP was a key molecule involved in drug resistance of tumor cells. Conclusions Matrix stiffness could regulate the drug resistance of breast cancer cells through YAP activation. This study not only provides a new direction for elucidating the mechanism of drug resistance, but also lays a new foundation for the drug delivery system of breast cancer treatment.

Objective To investigate the effect of different delivery methods on the levator ani muscle of the pelvic floor by transperineal three-dimensional ultrasound and TUI imaging. Methods 200 cases of pregnant women from August2014 to August 2016 in our hospital were divided into selective cesarean section group (n = 85) and vaginal delivery group (n= 115). The vaginal group, according to the intraoperative lateral segmentation, was further divided into vaginal lateral incision group (n = 65) and vaginal delivery without lateral incision group (n = 50). At the same time, select 80 cases of nulliparous women (volunteers) as control group, relevant indicators by three-dimensional imaging and TUI imaging technique. Results The vaginal delivery without lateral incision group, lateral incision group vaginal delivery and cesarean section group levator hiatus diameter, anteroposterior diameter, perimeter and area were significantly higher than the control group(P＜0.05), and vaginal delivery side cut was significantly higher than the other three groups (P＜0.05), vaginal delivery in two sub-group and cesarean section group of levator ani muscle thickness were significantly lower than the control group(P＜0.05), vaginal delivery in two sub groups were significantly lower than that in the cesarean section group (P＜0. 05); vaginal delivery group of levator ani muscle injury rate was significantly higher than that in the cesarean section group (P＜0. 05); There was no significant difference in the rate of levator ani muscle injury in vaginal delivery group (P＞0.05). Conclusion Compared with cesarean section, vaginal delivery is more obvious in changing the morphology and integrity of levator ani muscle, and vaginal delivery is more obvious than that of vaginal incision.

Background and purpose:Drug resistance is a major cause of failure in lung cancer chemotherapy. This study aimed to investigate the effect of YAP on doxorubicin resistance in lung cancer and its underlying mechanism. Methods:Doxorubicin resistant lung cancer cell clones were established from parental sensitive cancer PC9 cell line via in vitroinduction, and the expression of YAP was analyzed. YAP was down-regulated via shRNA to different levels. MTS assay was employed to determine cell proliferation and drug sensitivity. Flow cytometry was used to determine cell cycle distribution, apoptosis and uptake of Rh-123. Western blot and quantitative real-time polymerase chain reaction (QRT-PCR) assay were used to determine the expression of ABCB1, ABCC1, p53, Runx2, ITGB2 and ErbB4. The phosphory-lation of serine/threonine kinase (AKT) was determined as well.Results:Doxorubicin resistant PC9/Adr cell clone was obtained with over-expressed YAP. Expression of YAP in PC9/Adr cells was down-regulated to different levels via shR-NA. After YAP silencing, cell proliferation was reduced, while sensitivity to doxorubicin was increased. The cell cycle was significantly halted by G0/G1 phase. Doxorubicin induced-apoptotic rate and cellular uptake of Rh-123 were increased,with positive correlation to YAP silencing level. Western blot and QRT-PCR results showed that after YAP silencing, ABCB1, ABCC1, Runx2, ITGB2, and ErbB4 proteins were down-regulated, while the expression of p53 was up-regulated. Phosphorylation of AKT was inhibited as well.Conclusion:Over-expression of YAP is involved in doxorubicin resistance in PC9/Adr cell line. Silencing of YAP could restore doxorubicin sensitivity. The mechanism involves regulation of drug resistance-related genes and promotion of apoptosis.

Objective To establish a fluorescence quantitative Taqman-PCR method for rapid and accurate detection of mouse poxvirus.Methods After sequence alignment and comparison, ERPV_027 gene was selected as the primer and probe design gene.Furthermore, the specificity, sensitivity, stability and reproducibility of these primers and probes were detected.Results The detection limitation of this method was 68 copies/μL.Data showed that this method has high specificity, which specifically amplifies mouse poxvirus, with no amplification signal of mouse hepatitis virus, Sendai virus, Salmonella and some other viruses and bacteria.This method also showed good stability and reproducibility. Conclusions This study has successfully established a fluorescence quantitative Taqman-PCR method for detection of mouse poxvirus, with high specificity, sensitivity, good stability and reproducibility, and a broad application potential.

Objective To study the scientificity and rationality in data management of the project of Chinese Chronic Disease Clinical Research System and its Achievements Application Mode;To provide evidence and reference for the improvement of follow-up work. Methods According to the relevant management regulations, guidelines, and other relevant documents of national and international clinical research data,“Questionnaire for Research Data Management Assessment of Chinese Chronic Disease Prevention” was designed. The questionnaires were used in 10 clinical topics during the on-site inspection survey, and 20 valid questionnaires were retrieved and analyzed statistically. Results 50-60 percentage of subjects in data management and statistics were performed by the third party;70 percentage of subjects were performed by their own central monitoring;50 percentage of the subjects adopted a cooperative manner with others to develop appropriate data management systems;7 centers had system and plan for data management;Data management was carried out;implementation degree of training, database, CRF tracing, and others 7 aspects was low. Conclusion Improving the quality of data management of TCM clinical research still needs to be perfected from many aspects, and quality mode of large-scale clinical trials should be improved.

Ischemic preadaptation and ischemic postconditioning are the self-protection mechanism of the body, can reduce blood anoxic injury of brain tissue, inhibit nerve cell apoptosis, and reduce infarction area.However, due to the time of occurrence of ischemic disease is unpredictable, ischemic postconditioning research to guide clinical work more operational and practical, and thus become the focus of research. Apoptosis of programmed cell death is widespread in the process of biological life and has a close relationship with jak2/stat3/bcl-2 signaling pathway, PI3K/AKT signaling pathways and apoptotic molecules.microRNA as a class of highly conserved non-coding small RNA, its transcriptional expression involved in regulating cell value, development and apoptosis in a series of life activities.

Objective To investigate the numbers of corpus luteum and ovarian follicles and compare the levels of serum prolactin (PRL), luteinizing hormone (LH), follicle-stimulating hormone (FSH) and estradiol (E2 ) in different phases of estrus cycle in female gerbils .Methods Consecutively taking vaginal smears of the gerbils and directly examined under light microscope to distinguish the four phases of the estrus cycle .Hematoxylin and eosin staining was used to histological examination of the gerbil ovaries , and to detect the levels of serum PRL , LH, FSH and E2 by ELISA assay during estrus cycle .Results The proportion of cornified vaginal exfolliated cells could be the basis to distinguish four phases respectively:proestrus, oestrus, metoestrus, and dioestrus.Moreover, there were no significant differences between the numbers of ovarian follicles in different phases of estrus cycle .The numbers of corpus luteum in preoestrus were significantly lower than that in the other phases of estrus cycle ( P <0.05 ) .The levels of serum PRL and LH were increasing constantly from preoestrus to dioestrus , and both reached a peak at dioestrus ( P<0.05 ) .The levels of serum FSH and E2 both peaked at preoestrus , and were significantly higher than those at oestrus , metoestrus and dioestrus ( P<0.05).Conclusions There are no significant differences between the numbers of ovarian follicles in different phases of estrus cycle .Gonadotropin , prolactin and estradiol paly important roles in the regulation of estrous cycle .The phases during which surges of FSH and E 2 occur in Mongolian gerbils are similar to those of rats and mice , while the PRL and LH are different .Our findings provide further reference to the study of reproductive physiology of Mongolian gerbils .

Angiostrongylus cantonensis is a parasitic nematode that needs to develop in different hosts in different larval stages. Freshwater snails, such as Pomacea canaliculata, are the intermediate host, and rats are the definitive host. Periodic shedding of the cuticle (moulting) is an important biological process for the survival and development of the parasite in the intermediate and definitive hosts. However, there are few studies on the cuticle alterations between different stages of this parasite. In this study, we observed the ultrastructural appearance and changes of the cuticle of the 2nd/3rd stage larvae (L2/L3) and the 3rd/4th stage larvae (L3/L4) using a scanning electron microscope. We also first divided L2/L3 into late L2 and early L3. The late L2 lacked alae, but possessed a pull-chain-like fissure. Irregular alignment of spherical particles on the cuticle were noted compared to the L3. Alae appeared in the early L3. The old cuticle turned into a thin film-like structure which adhered to the new cuticle, and spherical particles were seen regularly arranged on the surface of this structure. Regular rectangular cavities were found on the surface of L3/L4. The caudal structure of L3/L4 was much larger than that of L3, but caudal inflation, such as seen in L4, was not observed. These results are the first to reveal the ultrastructural changes of the cuticle of A. cantonensis before and after moulting of L2/L3 and L3/L4.
Angiostrongylus cantonensis/*physiology/*ultrastructure ; Animals ; Larva/physiology/ultrastructure ; Microscopy, Electron, Scanning ; *Molting