Objective To study the physical stress reactions of soldiers undergone 100 kilometer march in battle gear,and explore the mechanism of biochemical changes in special military physical training.Methods Thirty four soldiers of armed-police force,averagely aged 18.6?1.6 years,169.3?4.2cm in height,weighted 65.4?4.5kg and with one-year of military physical training experience,were involved in present study.The soldiers were loaded about 25 kilogram of battle gear in a supervised 100 kilometer march in three days.The changes on biochemical index after the march were analyzed.Results After 100 kilometer march in battle gear,significant decline were found in the following biochemistry indexes in the soldiers involved: HB(P

AIM:To investigate protective effect of ethanol extract of Forsythia suspensa flower(FFE)on mitochondrial injury induced by free radicals,antioxidation and superoxide anion(O ?-__2)scavenging activities and anti-aging mechanism.METHODS:Thiobarbituric acid(TBA)colorimetric method was used to determine malondialdehyde(MDA).Spectrometric method was used to measure the swelling of mitochondria and activities of scavenging O ?-__2 which was produced by reduced nicotinamide adenine dinucleotide(NADH)-4-Nitrobluetetrazolium chloride(NBT)-N-Methylphenazonium methyl sulfate(PMS)system.The neck back of mice were injected subcutaneously with D-galactose to induce aging model at a dose of 100 mg/(kg?d)for 7 weeks.The effects of FFE on the activities of catlase(CAT),surperoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)and anti-hydroxyl radical were assayed by ammonium molybdate colorimetry,xanthine oxidase method,dithiodinitrobenzoic acid colorimetry and Fenton reaction colorimetry in vivo respectively.RESULTS:FFE could inhibit mitochondrial injury and swelling induced by Fe 2+-L-Cys in a concentration-dependent manner and also had significant O ?-__2 scavenging effect.Moreover,the activities of CAT,SOD,GSH-Px and anti-hydroxyl radical in mice liver homogenate were increased significantly by FFE.CONCLUSION:FFE protects mitochondria by scavenging reactive oxygen species,and increasing the activities of antioxidase.So FFE has the pharmaceutical values of antioxidant and anti-aging.

OBJECTIVE To investigate the protective effect and mechanism of quercetin on the cardiac and renal functions of rats with cardiorenal syndrome （CRS） based on the phosphoinositide 3-kinase （PI3K）/protein kinase B （Akt）/nuclear factor kappa- B （NF-κB） signaling pathway. METHODS CRS model of SD rats was induced by left anterior descending coronary artery ligation combined with acute renal ischemia-reperfusion. Model rats were randomly separated into model group， quercetin low-dose group （35 mg/kg）， quercetin high-dose group （70 mg/kg）， high-dose of quercetin+740Y-P group （70 mg/kg quercetin+3.5 mg/kg PI3K/Akt/ NF-κB signaling pathway activator 740Y-P）， with 12 rats in each group. Another 12 normal rats were selected as sham operation group. They were given relevant drugs， once a day， for 14 consecutive days. After administration， the cardiac function indexes [left ventricular ejection fraction （LVEF）， end-diastolic volume （EDV）， isovolumic relaxation time （IVRT）] and renal function indicators [blood urea nitrogen （BUN）， 24-hour urine protein， and serum creatinine （Scr）] were detected， and fibrosis in the cardiac and renal tissues was observed； the levels of inflammatory indexes [interleukin-1β （IL-1β） and tumor necrosis factor-α （TNF-α）] in the serum and cardiac and renal tissues as well as the expression of PI3K/Akt/NF-κB pathway-related proteins in the cardiac and renal tissues were detected. RESULTS Compared with sham operation group， the levels of BUN， 24-hour urine protein and Scr， collagen volume fraction of cardiac and renal tissues， the levels of IL-1β and TNF-α in serum and cardiac and renal tissues， and the phosphorylation of PI3K， Akt and NF-κB p65 protein in cardiac and renal tissues were increased significantly in model group （P＜0.05）； the levels of LVEF， IVRT and EDV were reduced significantly （P＜0.05）. Compared with the model group， the above indexes were reversed significantly in quercetin low-dose and high-dose groups （P＜0.05）， and the reversal effect was better in the high-dose group （P＜0.05）. 740Y-P restored the reverse effect of high-dose quercetin on the indexes （P＜0.05）. CONCLUSIONS Quercetin can alleviate cardiac and renal fibrosis and function injury， the mechanism of which may be 20232016） associated with inhibiting the activation of the PI3K/Akt/NF-κB signaling pathway.

[摘 要] 目的：探究三结构域蛋白59（TRIM59）调控人皮肤黑色素瘤细胞SK-MEL-2增殖、细胞周期、凋亡及迁移侵袭的作用机制，及其与Bcl2相关转录因子1（BCLAF1)之间的关系。方法：qPCR和WB法检测人表皮黑色素细胞HEMn-LP、人皮肤黑色素瘤细胞SK-MEL-2、UACC903、A375及36例邢台市人民医院2019年2月至2021年7月收集的皮肤黑色素瘤组织中TRIM59的mRNA和蛋白表达，使用脂质体将si-con、si-TRIM59转染至SK-MEL-2细胞中，WB法检测干扰TRIM59表达对细胞中周期蛋白D1（CCND1）、细胞周期素依赖性激酶2（CDK2）、肿瘤抑制蛋白基因（TP53）和BCLAF1蛋白表达的影响，CCK-8法、流式细胞术、划痕愈合实验、Transwell实验检测对细胞的活性、凋亡、迁移和侵袭的影响，免疫共沉淀（Co-IP）实验检测对细胞中TRIM59蛋白与BCLAF1结合能力的影响。结果：与HEMn-LP细胞相比，SK-MEL-2、UACC903、A375细胞中TRIM59 mRNA和TRIM59、BCLAF1蛋白均呈高表达（均P<0.05），SK-MEL-2细胞中TRIM59表达水平最高。相较于si-con组和Normal组，沉默TRIM59后，SK-MEL-2细胞的活性显著降低，细胞周期阻滞于G2期，CCND1、CDK2的蛋白表达显著降低，TP53蛋白和细胞凋亡率均显著升高，划痕抑制率明显升高，迁移侵袭细胞数明显降低（均P<0.05）。免疫共沉淀实验结果显示，TRIM59与BCLAF1之间存在蛋白结合关系。TRIM59与BCLAF1在肿瘤组织中的表达呈显著的正相关（r=0.878，P<0.001）。结论：干扰TRIM59表达能够抑制人皮肤黑色素瘤SK-MEL-2细胞的增殖、迁移和侵袭而促进凋亡，抑制SK-MEL-2细胞的恶性生物学行为，其机制可能与TRIM59结合BCLAF1有关。

Objective To investigate the relationship between the G894T polymorphism of the endothelial nitric oxide synthase (eNOS) gene and the lipid metabolism in patients with irypertensive disorder complicating pregnancy (HDCP). Methods The 528 cases of HDCP patients admitted to the Xingtai Third Hospital from January 2016 to January 2020 were selected as the research objects, and 128 normal pregnant women during the same period were selected as the control group. The fasting peripheral venous blood of all stud)' subjects in the early morning was collected, and blood lipid indexes, cystatin C (CysC) and uric acid levels and other biochemical index levels were measured. According to the blood lipid level, it was divided into normal blood lipid group and dyslipidemia group. The dyslipidemia group included 4 subgroups [ hyper triglyceride (TG) blood group (T G ^ 1. 70 mmol/L), low high-density lipoprotein cholesterol (HDL-C)] Iryper lipidemia group (HDL-C< 1. 04 mmol/L), high total cholesterol (TC) group (TC ^ 5 . 18 mmol/L), mixed hyperlipidemia group (TG ^ 1. 70 mmol/L, TC ^ 5.18 mmol/L)]. In addition, polymerase chain reaction-restriction endonuclease length fragment polymorphism (PCR-RFLP) was used to perform genotyping analysis on the G894T locus of the eNOS gene, which was divided into TT, GT and GG genotypes. The distribution of gene polymorphisms in people with different blood lipid levels was compared, and Logistic regression was used to analyze the influencing factors of dyslipidemia and the relationship between NOS gene G894T polymorphism and dyslipidemia. Results The expected and observed genotypes of GG, GT, TT, eNOS gene G894T locus in the stud)' group and the control group conformed to the Hardy-Weinberg equilibrium law (X' = 0. 651, P = 0. 722 •X' =i. 845, P = 0. 398), and the GG type gene frequency and G allele frequency of the stud)' group were higher than those of the control group, and the TT type gene frequency and T allele frequency of the stud)' group were lower than those of the control group (P < 0. 05); homocysteine (Hey), uric acid, C-reactive protein (CRP).The urine microalbumin to creatinine ratio (UACR) level and body mass index(BMI) were higher than those in the normal blood lipid group, and the rate of taking antihypertensive drugs was lower (P < 0 . 05). Dyslipidemia group eNOS gene (G894T) gene GG gene frequency and G allele were higher than normal blood lipid group, TT gene frequency and T allele were lower than normal blood lipid group (P<0.001). The BMI of patients in the low HDL-C group, hyper TG group and mixed hyperlipidemia group was higher than that of the normal blood lipid group (P< 0. 05); The Hey level of the mixed hyperlipidemia group was higher than that of the normal blood lipid group (P<0. 05). The TT gene frequency and T allele frequency of the low HDL-C group and the mixed hyperlipidemia group were significantly lower than those of the normal blood lipid group, and the GG gene frequency and G allele frequency were higher than the normal blood lipid group (P<0. 05). Logistic regression analysis showed that genotype TT was a protective factor for dyslipidemia in patients with HDCP, and genotype GG, high BMI and high Hey levels were independent risk factors for dyslipidemia. Conclusion There is a significant correlation between the G894T polymorphism of the eNOS gene and dyslipidemia among patients with hypertension in pregnancy. The genotype TT is a protective factor, and the genotype GG/GT is an independent risk factor; at the same time, BMI and Hey will also affect dyslipidemia.

AIM: To study the expression of c-jun in brain stem following moderate lateral fluid percussion brain injury in rats, and to observe the temporal patterns of its expressions following percussion.METHODS: Male Sprague-Dawley rats were divided into normal control, sham operation control and injury groups. The rats of injury group subjected to moderate lateral fluid percussion injury (0.2 mPa), and then were subdivided into 5 min, 15 min, 30 min, 1 h, 2 h, 4 h, 8 h and 12 h groups according to the time elapsed after injury. The expression of c-jun was studied by immunohistochemistry and in situ hybridization. RESULTS: After percussion for 15 min, Jun positive neurons increased in brain stem progressively, and peaked at 12h. At 5min after percussion, the induction of c-jun mRNA was increased, and remained elevated up to 1h-2h after brain injury. CONCLUSION: The induction and expression of the c-jun in brain stem after fluid percussion brain injury were increased rapidly and lasted for a long time.

BACKGROUND: Nano-hydroxyapatite/polyamide 66 composite (n-HA/PA66) has good biocompatibility, osteoinduction, osteoconductivity and osteogenesis. It is widely used in clinical fracture healing, spinal fusion, and other bone repair. OBJECTIVE: To observe the effect of n-HA/PA66 filling combined with locking plate in the treatment of fibrous dysplasia of femoral bone. METHODS: From May 2015 to May 2018, 15 patients with fibrous dysplasia of bone were admitted to Xingtai People’s Hospital Affiliated to Hebei Medical University. There were 4 males and 11 females, aged 16-58 years. The lesions were all located in the femur. They were all treated with n-HA/PA66 filling combined with locking plate. The patients were followed up for 18-40 months. Imaging examination (X-ray and CT scan) was carried out to evaluate the bone healing. Musculoskeletal Tumor Society (MSTS) score and Harris score were used to assess the functional recovery of patients after operation. RESULTS AND CONCLUSION: (1) X-ray films showed that there was a clear boundary between the transplanted bone and the host bone immediately after the operation. At 3 months after the operation, the transplanted bone was replaced partly by crawling. At 6 months, new bone formation was obvious. At 9-12 months, new bone formed completely. The transplanted bone was basically catabolized. At 18 months, the new bone was completely integrated with the host bone. The boundary between the new bone and the host bone disappeared. New bone and host bone are connected by direct trabecula. (2) At the last follow-up, CT images showed that the local lesions were eliminated; no recurrence or metastasis occurred; and the grafts healed completely. The G/N ratio was 0.78±0.09. (3) At the last follow-up, 15 patients’ pain all disappeared, MSTS score was 28.1±0.7. Harris score was 94.3. Daily physical activity was restored. (4) n-HA/PA66 composite material has obvious osteogenic effect on the bone defect caused by the removal of fibrous dysplasia. Locking plate fixation can make patients move early and obtain good postoperative function.

AIM:To investigate the main clinical features, pathogen distribution and drug sensitivity of lacrimal angiitis, and to provide evidence for clinical diagnosis and treatment.

METHODS:Retrospective study. A total of 45 patients(45 eyes)diagnosed with lacrimal angiitis in Hebei Eye Hospital from December 2016 to October 2020 were selected to analyze the general information, clinical manifestations and previous treatment history, bacterial culture results, and drug sensitivity test results.

RESULTS:All 45 patients had monocular disease, including 21 eyes with tears, increased secretion, conjunctival congestion in inner canthus, 14 eyes with red and swollen inner canthus, 6 eyes similar to eyelid cyst, and 4 eyes were found and diagnosed during routine preoperative examination. 27 eyes were previously diagnosed with other eye diseases, and the misdiagnosis rate was 60.0%. The positive rate of bacterial culture was 80.0%(36/45), Staphylococcus epidermidis was the most common, followed by Streptococcus; 52.8%(19/36)of the patients were infected with multidrug-resistant bacteria. The sensitivity rate of bacteria to fluoroquinolones(82.9%, 97/117)was higher than that of aminoglycosides(70.1%, 68/97)and cephalosporins(68.1%, 111/163). Except vancomycin, rifampicin, levofloxacin and chloramphenicol were highly sensitive to Gram-positive bacteria.

CONCLUSION: Staphylococcus epidermidis is the most common pathogen of dacryocystitis, followed by Streptococcus. Levofloxacin and rifampicin can be the first choice antibiotics for local anti-infection. Rational drug use can reduce the formation of multidrug-resistant bacteria. The cure rate can be improved by complete removal of stones by incision and plasty of lacrimal canaliculus.

AIM: To compare and observe the characteristics of choroidal neovascularization(CNV)and polypoidal choroidal vasculopathy(PCV)in indocyanine green angiography(ICGA)and optical coherence tomography angiography(OCTA),and to discuss their differences and pros and cons.METHOD: The imaging data of 26 CNV patients(34 eyes)and 19 PCV patients(19 eyes)diagnosed at Hebei Eye Hospital from September 2018 to April 2020 were retrospectively analyzed. There were 20 cases(28 eyes)of wet age-related macular degeneration(w-ARMD)in CNV patients and 6 cases(6 eyes)of chronic central serous chorioretinopathy(CCSC)secondary to CNV. All patients underwent OCTA, fundus fluorescein angiography(FFA)+ICGA, analyzing the characteristic changes of lesions.RESULT: OCTA examination of w-ARMD patients(28 eyes)showed that, except for 2 eyes where no obvious abnormality was seen due to severe bleeding, the morphology of CNV can be seen in the remaining 26 eyes in a clear, three-dimensional way, and even the anatomical level where CNV was located could be found. Among them, 11 eyes examined by OCTA can not only show the morphology, size and affected area of CNV, but also can better distinguish the nourishing vessels, new vessels and anastomotic branches. CNV morphology not detected by FFA+ICGA was found by OCTA in 6 eyes of patients with CCSC secondary to CNV. A clearer vision of abnormal choroidal branching vascular network(BVN)can be found clearer by OCTA than ICGA in 19 eyes of PCV patients, but OCTA cannot show the number of terminal saccular dilatations(polyps)as clearly as ICGA.CONCLUSION: The positive rate of CNV detected by OCTA is higher than that of ICGA. The lesions range of CNV and PCV detected by OCTA is clearer and more stereoscopic than that of ICGA.But it cannot show all terminal saccular dilatations in PCV patients, and it cannot be used to monitor the leakage of CNV or PCV and lesion progression. So it is less effective than FFA+ICGA in this aspect. As a non-invasive examination, OCTA can be used in the follow-up to observe the changes in lesions before and after CNV or PCV treatment.

Objective: To investigate the expression of galectin-3 protein in human breast cancer tissues and the effect of silencing galectin-3 gene on the migration, invasion and apoptosis of human breast cancer MCF-7 cells. Methods: The relative expression of galectin-3 protein in 15 cases of breast cancer tissues and corresponding para-cancerous tissues were detected by Western blotting; The expression of galectin-3 protein in paraffin sections of 100 cases of breast cancer tissues were detected by immunohistochemistry, and the correlation between galectin-3 expression and the clinicopathological characteristics of breast cancer patients was also analyzed. Galectin-3 siRNA were transfected into human breast cancer MCF-7 cells by liposome, then Real-time PCR and Western blotting were used to detect the mRNA and protein expression of galectin-3. The effect of galectin-3 gene silencing on cell migration and invasion ability of MCF-7 cells were detected by Transwell method. The effect of galectin-3 gene silencing on apoptosis of MCF-7 cells were detected by flow cytometry. Results: Western blotting detection showed that the relative expression of galectin-3 protein in breast cancer tissues were significantly higher than that in para-cancerous tissues (P<0.05); Immunohistochemistry detection showed that the positive expression rate of galectin-3 protein in breast cancer tissues was 67.00%, the positive expression rates in the lymph node metastasis, hormone receptor (ER, PR) negative groups were significantly higher (P<0.05), and the positive expression rate of galectin-3 protein were increased with the increase of TNM stage and histological grade (P<0.05); Galectin-3 siRNA transfection could significantly reduce the mRNAand protein expression of galectin-3 in MCF-7 cells (P<0.05), and reduce the invasion and migration ability but significantly improve the rate of apoptosis of MCF-7 cells (P<0.05). Conclusion: Galectin-3 is highly expressed in breast cancer tissues, and its silence can inhibit the invasion and metastasis of MCF-7 cells and induce apoptosis of MCF-7 cells. Galectin-3 can be used as a new target for biological therapy of breast cancer.