Objective To investigate the effects of different angles of pulmonary surfactant(PS)administration on the incidence of bronchopulmonary dysplasia and intracranial hemorrhage in preterm infants.Methods A prospective study was conducted on 146 preterm infants(gestational age＜32 weeks)admitted to the Department of Neonatology,Provincial Hospital Affiliated to Anhui Medical University from January 2019 to May 2023.The infants were randomly assigned to different angles for injection of pulmonary surfactant groups:0° group(34 cases),30° group(36 cases),45° group(38 cases),and 60° group(38 cases).Clinical indicators and outcomes were compared among the groups.Results The oxygenation index was lower in the 60° group compared with the other three groups,with shorter invasive ventilation time and oxygen use time,and a lower incidence of bronchopulmonary dysplasia than the other three groups(P＜0.05).The incidence of intracranial hemorrhage was lower in the 60° group compared to the 0° group(P＜0.05).The cure rate in the 60° group was higher than that in the 0° group and the 30° group(P＜0.05).Conclusions The clinical efficacy of injection of pulmonary surfactant at a 60° angle is higher than other angles,reducing the incidence of intracranial hemorrhage and bronchopulmonary dysplasia in preterm infants.[Chinese Journal of Contemporary Pediatrics,2024,26(4):337-342]

Objective To investigate the impact of matrine(Mat)on renal injury in rats with chronic glomerulonephritis by regulating the monocyte chemotactic protein-1(MCP-1)/chemokine C-C-motif receptor 2(CCR2)signaling pathway.Methods The rat model of chronic glomerulonephritis was established by subcutaneous injection of bovine serum albumin,the rats were randomly grouped into control group,model group,low and high dose matrine groups(Mat-L group,Mat-H group),and matrine+CCR2 group(Mat+CCR2 group),with 10 rats in each group.After continuous gavage for 4 weeks,24-hour urine protein excretion was measured;spleen and thymus were removed and organ index was calculated;The levels of blood urea nitrogen(BUN)and serum creatinine(Scr)in the serum of each group were detected,the pathological changes of renal tissue were observed by HE staining;the levels of tumor necrosis factor α(TNF-α)and interleukin(IL)-6 in renal tissue were detected by ELISA;Flow cytometry was applied to detect the proportion of T lymphocyte subsets in peripheral blood of rats in each group;Western blotting was applied to determine the expression of MCP-1 and CCR2 proteins.Results The spleen index and thymus index of rats in the model group rats were obviously reduced,and there were a large number of inflammatory cell infiltration in the renal tissue,the 24-hour urine protein,BUN,Scr,TNF-α,IL-6,and the expression of MCP-1 and CCR2 obviously increased,the peripheral blood T cell subpopulations CD3+,CD4+,and CD4+/CD8+ratio obviously reduced,the proportion of CD8+obviously increased(P＜0.05);The spleen index and thymus index of rats in the Mat-L and Mat-H groups of rats increased,and the phenomenon of renal tissue inflammation and infiltration improved,the 24-hour urine protein,BUN,Scr,TNF-α,IL-6,and the expression of MCP-1 and CCR2 obviously decreased,the peripheral blood T cell subpopulations CD3+,CD4+,and CD4+/CD8+ratio obviously increased,the proportion of CD8+obviously decreased(P＜0.05);CCR2 attenuated the effect of Mat-H on immune function in rats with chronic glomerulonephritis.Conclusion Matrine can alleviate the inflammatory damage and improve the peripheral immune function of rats with chronic glomerulonephritis,and its mechanism may be related to the inhibition of MCP-1/CCR2 signaling pathway.

OBJECTIVE：To systematically e valuate the efficacy and safety of expectorant/antioxidants in the treatment of chronic obstructive pulmonary disease （COPD），and to provide evidence-based reference for clinical use. METHODS ：Retrieved from PubMed ，Embase，Cochrane Library ，Web of Science ，CBM，CNKI，VIP，Wanfang database ，etc.，randomized controlled trials（RCTs）about expectorant/antioxidants （trial group ）versus placebo （control group ）in the treatment of COPD were collected during the inception to May 2021. After literature screening and data extraction ，the quality of included literatures were evaluated with risk bias evaluation tool recommended by Cochrane systematic evaluator manual 5.1.0. The consistency check was performed by using Gemtc 14.3 software；network Meta-analysis ，clustering and hierarchical sorting were performed with Stata 15.1 software. The publication bias was analyzed by inverted funnel plot. RESULTS ：A total of 12 RCTs，involving 4 637 patients，were included. Five interventions measures were involved ，such as low-dose N-acetylcysteine （NAC），high-dose NAC ，carbo- cisteine， erdosteine and placebo. The results of network Meta-analysis showed that in terms of annual acute aggrava- tion rate ，the patients receiving high-do se NAC [MD ＝－0.45， 163.com 95％CI（－0.74，－0.17），P＜0.05]，carbocisteine [MD ＝－0.59，95％CI（－0.86，－0.32），P＜0.05] and erdosteine [MD ＝－0.26，95％CI（－0.51，－0.01），P＜0.05] in trial group were significantly lower than those in control group ；the annual acute aggravation rate of patients receiving high-dose NAC[MD ＝－0.55， 95％CI（－0.98，－0.11），P＜0.05] and carbocisteine [MD ＝－0.69，95％CI（－1.11，－0.26），P＜0.05] in trial group were significantly lower than those receiving low-dose of NAC ，there was no statistical significance among other groups （P＞0.05）； probability cumulative ranking results （calculated by the area under the curve ）of its network Meta-analysis was carbocisteine ＞ high-dose NAC ＞erdosteine＞placebo＞low-dose NAC. In terms of the incidence of ADR ，there was no statistical significance among groups （P＞0.05）；probability cumulative ranking results （calculated by the area under the curve ） of its network Meta-analysis was erdosteine ＞high-dose NAC ＞low-dose NAC ＞placebo＞carbocisteine. The results of clustering and hierarchical ranking showed that the efficacy and safety of the five interventions could be grouped into three categories ，including placebo and low-dose NAC with low efficacy and safety ，carbocisteine with good efficacy but low safety ，and high-dose NAC and erdosteine with good efficacy and safety. The results of publication bias showed that taking the annual acute exacerbation rate as the index ， there was a greater possibility of publication bias in this study ；taking the incidence of adverse event as index ，there was little possibility of publication bias in this study. CONCLUSIONS ：NAC，carbocisteine and erdosteine all can reduce the annual acute aggravation rate and have low incidence of ADR. Carbocisteine is the best in terms of annual acute aggravation rate ，erdosteine is the best in terms of safety. High-dose NAC and erdosteine are both better in term of efficacy and safety.

A small survey was performed to investigate the recent infection status of Clonorchis sinensis and other zoonotic trematode metacercariae in freshwater fish from a local market of Yen Bai city, Yen Bai province, northern Vietnam. A total of 118 fish in 7 species were examined by the artificial digestion method on March 2016. The metacercariae of 4 species of zoonotic trematodes, i.e., C. sinensis, Haplorchis pumilio, Haplorchis taichui, and Centrocestus formosanus, were detected. The metacercariae of C. sinensis were found in 62 (69.7%) out of 89 fish (5 species), and their intensity of infection was very high, 81.2 per fish infected. Prevalences of 3 intestinal flukes, H. pumilio, H. taichui and C. formosanus, were 75.0%, 47.6%, and 31.7% in positive fish species, respectively, with the metacercarial intensities of 15.5, 10.3, and 2.2 per fish infected. From the above results, it has been confirmed that various species of freshwater fish continue to play the role of the infection source of C. sinensis and other zoonotic trematodes in Yen Bai city, Yen Bai province, northern Vietnam. It is of particular note that the prevalence and intensity of C. sinensis metacercariae are much higher than those reported in previous studies in fish in northern Vietnam.

AlphaB-crystallin (CRYAB) plays the role of molecular chaperone, it can maintain vascular endothelial growth factor levels and promote tumor neovascularization. Several recent studies indicate that CRYAB is abnormally expressed in various tumors such as breast cancer, lung cancer, colorectal cancer, and bladder cancer. It promotes tumor migration and invasion by promoting the resistance of tumor cells to apoptosis, regulating the secretion of matrix metalloproteinase and cadherin, and participating in the epithelial-mesenchymal transition process. The abnormal expression of CRYAB in tumor cells is significantly related to tumor stage, lymph node metastasis, overall survival and poor prognosis, and can be used as a new tumor marker.

Objective The morphological data of the second thoracic vertebra and the third lumbar vertebra were measured by computerized tomography （CT）. The sex differences were analyzed and the discrimination equation was obtained. Methods The data of 274 adults （203 cases from experimental group and 69 cases from validation group） from central China were collected. Four linear data （maximum transverse length of vertebral body, maximum longitudinal length of vertebral body, maximum transverse length of vertebral foramen, maximum longitudinal length of vertebral foramen）, one angle data （angle between spinous processes） and two area （vertebral foramen area, total cross-sectional area of vertebral body） data of the second thoracic vertebra and the third lumbar vertebra were collected, respectively. Then three ratios ［maximum transverse length/　maximum longitudinal length of vertebral body, maximum transverse length/ maximum longitudinal length of vertebral foramen, vertebral foramen area/ （total cross-sectional area of vertebral body-vertebral foramen area）］ and one angle （angle between spinous processes） were obtained. The discriminant equation was established for sexual discriminant analysis. Results The morphology of the second thoracic vertebra and the third lumbar vertebra was related with gender. Four single index discriminant formulae and eleven multi-index discriminant formulae were established. The 69 validation group samples were substituted into the formula for testing, and the maximum discriminant accuracy rate of the single-index discriminant formula was 75%. The maximum discriminant accuracy rate of multi-index discriminant formula was 83%. Conclusion It is feasible to conduct individual sex analysis by the morphological indexes of second thoracic vertebra and the third lumbar vertebra. The indexes have important application values in practice.
China ; Female ; Lumbar Vertebrae/diagnostic imaging* ; Male ; Thoracic Vertebrae/diagnostic imaging* ; Tomography, X-Ray Computed ; Vertebral Body

Objective: To establish a mouse model of osteoarthritis (OA) and study the bone microarchitecture and bone metabolism of tibial subchondral bone in early stage of OA. Methods: The mouse model of post-traumatic osteoarthritis (PTOA) with anterior cruciate ligament (ACLT) was established by using c57 mice. The Sham operation group served as the control group. All mice were fed with conventional diet. All mice were sacrificed after 4 weeks. The degeneration of knee joint was observed by HE staining and Safranin O-Fast Green staining. The number of osteoclasts was counted by TRAP staining. Micro CT was used to analyze the quantitative parameters of the microstructure of tibia subchondral bone in mice. Serum levels of bone resorption biomarker CTX I and cartilage degeneration marker CTX II were determined. Results: After ACLT 4 weeks, the average score of OARSI in ACLT group was 3.2, which was higher than that in Sham group, and the joint degeneration occurred in mice, presenting the pathological characteristics of early OA. Compared with the sham operation phase, the total subchondral bone volume (TV) of ACLT group was 4.72 mm³, increased by 13.6%; the bone trabecular resolution (Tb.Sp) was 0.130 and 0.154 mm, respectively, and the ACLT group also increased by 18.8%; the bone volume/tissue volume (BV/TV) was 0.470 and 0.294, respectively, and the ACLT group decreased by 48.9%; the bone trabecular thickness (Tb.Th) was 0.162 and 0.083 mm groups, ACLT decreased by 37.5%. Trap staining showed that the number of osteoclasts per unit volume in ACLT group was 72, which was significantly higher than that in sham operation group. The CTX I of mice in the sham operated ACLT group and sham operated group were 20.9 ng/ml and 18.29 ng/ml, with an increase of 48.9% in the ACLT group; the CTX II of mice in the ACLT group and sham operated group were 35.5 ng/ml and 28.6 ng/ml, with an increase of 24.1% in the ACLT group. Conclusion ACLT Mouse model can successfully construct early OA, which confirms the early loss of osteochondral bone and the pathological changes of osteoclast activation in OA, and provides a new specific target for the treatment of OA.

To investigate the prevalence of Toxoplasma gondii in pork on the market in Korea, an in-house enzyme-linked immunosorbent assay for tissue fluid (CAU-tf-ELISA) was developed using a soluble extract of T. gondii RH strain tachyzoites. As the standard positive controls, the piglets were experimentally infected with T. gondii: Group A (1,000 cysts-containing bradyzoites), Group B (500 cysts-containing bradyzoites) and Group C (1.0×103 or 1.0×104 tachyzoites). The CAU-tf-ELISA demonstrated infection intensity-dependent positivity toward tissue fluids with average cut-off value 0.15: 100% for Group A, 93.8% for Group B and 40.6% for Group C. When tissue-specific cut-off values 0.066–0.199 were applied, CAU-tf-ELISA showed 96.7% sensitivity, 100% specificity, 100% positive and 90.0% negative predictive values. When compared with the same tissue fluids, performance of CAU-tf-ELISA was better than that of a commercial ELISA kit. Of the 583 Korea domestic pork samples tested, anti-T. gondii antibodies were detected from 9.1% of whole samples and 37.9% from skirt meat highest among pork parts. In the 386 imported frozen pork samples, 1.8% (skirt meat and shoulder blade) were positive for anti-T. gondii antibodies. In Korea, prevalence of anti-T. gondii antibodies in the pork on retail markets appeared high, suggesting that regulations on pig farming and facilities are necessary to supply safe pork on the tables.
Agriculture ; Antibodies ; Enzyme-Linked Immunosorbent Assay ; Korea ; Meat ; Prevalence ; Red Meat ; Sensitivity and Specificity ; Shoulder ; Social Control, Formal ; Toxoplasma

OBJECTIVE: To investigate paraffin section thickness in immunohistochemical detection of p16 expression in cervical tissue samples. METHODS: p16 immunohistochemical staining was performed in 150 cases of chronic cervicitis, 126 cases of low-grade squamous intraepithelial lesions(LSIL), 96 cases of high-grade squamous intraepithelial lesions (HSIL) and 78 cases of cervical cancer from January 2014 to March 2018 in Zhongshan Boai Hospital. The results of p16 protein expression in paraffin sections with thickness of 2, 3, 4, 5 and 6 μm were compared using Logistic regression analysis. RESULTS: With the increase of slice thickness, the staining of p16 protein in nucleus gradually increased. The thickness of cervical slices in chronic cervicitis and cervical cancer samples had no significant effect on the positive rate of p16 protein(=7.817 and 1.332, both >0.05), while the thickness of slices in LSIL and HSIL samples had significant effect on the positive rate of p16 protein (=17.688 and 10.182, <0.05 or <0.01). The stable and reliable results were obtained when the slices were between 3 and 5 μm thick. CONCLUSIONS Paraffin sections with thickness of 3.0-5.0 μm are recommended for immnohistochemical staining of p16 protein in cervical tissue samples.
Biomarkers, Tumor ; genetics ; metabolism ; Cervical Intraepithelial Neoplasia ; Cyclin-Dependent Kinase Inhibitor p16 ; genetics ; metabolism ; Female ; Histocytological Preparation Techniques ; standards ; Humans ; Immunohistochemistry ; Paraffin ; Squamous Intraepithelial Lesions of the Cervix ; Uterine Cervical Neoplasms ; physiopathology

An epidemiological study was performed to know the recent infection status of Paragonimus westermani metacercariae (PwMc) in freshwater crayfish, Cambaroides similis, from 2 streams in Jeollanam-do, Republic of Korea. Crayfish were collected from creeks in Bogil-do (Island), Wando-gun, and in a creek near Daeheung Temple in Haenam-gun. The infection rate of crayfish with PwMc in Bogil-do was 89.8%, and the metacercarial burden was 37 PwMc per the infected crayfish. Crayfish in a creek near Daeheung Temple were larger and twice heavier than those in Bogil-do. Of them, 96.5% were infected with PwMc. An average of 140 metacercariae was found in the infected crayfish, almost quadruple to those of Bogil-do. There was a strong correlation between the number of PwMc and body weight of the crayfish. These results suggest that P. westermani metacercariae are still prevalent in crayfish of the 2 regions in Jeollanam-do, Korea.
Astacoidea* ; Body Weight ; Epidemiologic Studies ; Fresh Water* ; Incidence* ; Jeollanam-do* ; Korea* ; Metacercariae* ; Paragonimus westermani* ; Paragonimus* ; Republic of Korea ; Rivers