With the changing disease spectrum, the incidence of tumors is increasing and tends to occur among the youth. The long-term survival rate of patients with cancer has increased significantly, and attention to their reproductive rights is growing. Surgery, chemotherapy, radiotherapy, immunotherapy, and molecular targeted therapy are the conventional treatment methods for cancer, with each exerting different effects on the fertility of patients. Common fertility preservation techniques currently include sperm cryopreservation, embryo and oocyte cryopreservation, ovarian tissue cryopreservation, uterine transplantation, and assisted reproductive technology. This article systematically summarizes the influence of different antitumor treatments on fertility, as well as the current status and prospects of fertility preservation in patients with cancer. This study aims to improve cooperation between clinical oncologists and reproductive medicine doctors to enhance fertility preservation for patients with cancer.

Na⁺/H⁺ antiporter (NHX) gene subfamily plays an important role in plant response to salt stress. In this study, we identified the NHX gene family members of Chinese cabbage and analyzed the expression patterns of BrNHXs gene in response to abiotic stresses such as high temperature, low temperature, drought and salt stress. The results showed that there were 9 members of the NHX gene family in Chinese cabbage, which were distributed on 6 chromosomes respectively. The number of amino acids was 513-1 154 aa, the relative molecular weight was 56 804.22-127 856.66 kDa, the isoelectric point was 5.35-7.68. Members of BrNHX gene family mainly existed in vacuoles, the gene structure is complete, and the number of exons is 11-22. The secondary structures of the proteins encoded by the NHX gene family in Chinese cabbage had alpha helix, beta turn and random coil, and the alpha helix occurred more frequently. Quantitative real-time PCR (qRT-PCR) analysis showed that the gene family members had different responses to high temperature, low temperature, drought and salt stress, and their expression levels differed significantly in different time periods. BrNHX02 and BrNHX09 had the most significant responses to these four stresses, and their expression levels were significantly up-regulated at 72 h after treatments, which could be used as candidate genes to further verify their functions.
Genome, Plant ; Multigene Family ; Stress, Physiological/genetics* ; Brassica/metabolism* ; Gene Expression Regulation, Plant ; Phylogeny ; Plant Proteins/metabolism*

Objective:To establish a patient-derived xenograft (PDX) humanized mouse model for hepatoblastoma in children. In addition, compare the biological consistency between successfully modeled PDX tumors and primary tumors in children while comparing and analyzing the influence of PDX model modeling success as a key factor.Methods:A PDX tumor model was constructed from fresh tumor tissue samples from 39 children with hepatoblastoma. The tumor growth time and volume size were recorded in detail. Simultaneously, 39 children’s data were collected for experimental and clinical analysis. The difference in tumorigenesis rate between different parameters was analyzed by χ2 test (categorical variable). Continuous variables with a normal distribution were compared using the t-test. Results:After cell passage and pathological diagnosis, 21 cases of hepatoblastoma PDX models were successfully constructed, with a success rate of 53.8% (21/39). Tumor samples from each generation of successfully modeled PDX models had pathology results that were consistent with those of the corresponding primary tumors. The analysis of the key factors affecting the tumor formation rate of PDX revealed that the metastasis rate was more successful in primary tumors than in liver in situ tumors (7/8 vs. 14/31, P = 0.049). However, there was no significant difference between tumor formation rates and pathological subtypes. According to the PDX tumor formation group comparison between the primary tumor and the metastatic tumor, there was no statistically significant difference between the two groups in terms of tumor formation time and tumor volume. Hematoxylin-eosin staining in hepatoblastoma’s PDX mouse was consistent with the primary tumor. Immunohistochemistry positivity rates of four proteins, namely hepatocyte antigen (Hepatocyte), phosphatidylinositol glycan 3, β-catenin, and alpha-fetoprotein, in primary tumor tissues and PDX mouse models were 100% vs. 100%, 100% vs. 95.24%, 100% vs. 100%, and 95.24% vs. 85.71%, respectively. Conclusion:A PDX mouse model for hepatoblastoma has been successfully established in children. The tumor formation rate is high, with metastatic tumors having a higher tumor formation rate than primary tumors and transplanted tumors retaining the biological characteristics of primary tumors.

Objective:To compare the pathological results and complications of limited and extended pelvic lymph node dissection among high-risk prostate cancer patients, and to explore the risk factors that affect the rate of lymph node metastasis in high-risk prostate cancer patients.Methods:The data of 800 high-risk prostate cancer patients who underwent radical prostatectomy and pelvic lymph node dissection from January 2016 to December 2020 in three affiliated hospital of Sun Yat-sen University were analyzed retrospectively. According to the scope of pelvic lymph node dissection, they were divided into limited pelvic lymph node dissection (LPLND) group and extended pelvic lymph node dissection (EPLND) group. There were 172 patients underwent LPLND, and 628 patients underwent EPLND.The age of the patients in the LPLND group was 67 (62, 72) years old, diagnosed PSA 20.7 (10.9, 54.8) ng/ml. The biopsy Gleason score 6 in 22 cases, 7 in 59 cases, 8 in 56 cases and 9-10 in 35 cases.The clinical T stage: T 1 in 29 cases, T 2 in 102 cases, T 3 in 37 cases, T 4 in 4 cases; N 0 in 160 cases and N 1 in 12 cases. 50 patients received neoadjuvant hormonal therapy. The age of patients in the EPLND group was 67 (63, 72) years old, diagnosed PSA was 23.9 (14.0, 46.8) ng/ml. Biopsy Gleason Score 6 in 51 cases, 7 in 194 cases, 8 in 218 cases and 9-10 in 165 cases. Clinical T stage: T 1 in 114 cases, T 2 in 341 cases, T 3 in 144 cases, T 4 in 29 cases; N 0 in 526 cases and N 1 in 102 cases.158 patients received neoadjuvant hormonal therapy. There were no significant differences in the age, PSA, puncture Gleason score, clinical T stage, and whether or not to receive neoadjuvant hormonal therapy between the two groups of patients ( P>0.05). The difference in clinical N staging was statistically significant ( P=0.002). The number of postoperative lymph nodes, positive pelvic lymph nodes and postoperative complications and other related clinical and pathological data of the two groups were analyzed. Multivariate logistic regression was used to analyze the risk factors of patients with positive lymph nodes. Results:The median number of lymph nodes harvested [13(8, 19)vs. 6(4, 13), P<0.001] and the rate of positive lymph node cases[31.2%(196/628) vs. 10.5%(18/172), P<0.001] in the EPLND group was significantly higher than those in the LPLND group. Preoperative PSA, clinical N staging, Gleason score, and way of lymph node dissection were independent risk factors for postoperative positive pelvic lymph node in high-risk prostate cancer patients. Compared with the LPLND group, the ELPND group had a higher postoperative complication rate [19.9%(125/628) vs. 11.0%(11/172), P=0.007]. Conclusions:Compared with the LPLND, EPLND in high-risk prostate cancer patients can harvest more lymph nodes and increase the detection rate of positive lymph nodes. The complications of EPLND were higher than those of LPLND. Preoperative PSA, clinical N stage, Gleason score, and the way of lymph node dissection are independent risk factors for positive pelvic lymph node dissection.

Objective:To investigate the feasibility and characteristics of ultrasound imaging in diagnosing fractures in neonates.Methods:Thirty neonates with bone fracture in Beijing Chaoyang District Maternal and Child Healthcare Hospital during January 2018 to June 2019 were retrospectively recruited. The causes and ultrasound imaging features of these cases were analyzed. The ultrasound findings were compared with the results of X-ray examination.Results:Among the 30 cases, 29 (96.7%) were diagnosed as fracture due to birth trauma, including 28 (93.3%) of clavicle fracture and one (3.3%) of humerus fracture, and one (3.3%) with rib fracture probably caused by metabolic osteopathy. The ultrasound imaging characteristics included interruption of bone continuity, dislocation and/or angulation of fracture ends, and callus formation during recovery. All of the 30 cases were diagnosed by ultrasound. However, X-ray examination failed in the diagnosis of one clavicle fracture.Conclusions:Ultrasound is an accurate and reliable method for the diagnosis of neonatal fracture. The main characteristics of ultrasound imaging include interruption of bone continuity, dislocation and/or angulation of fracture ends and callus formation.

Objective The protein kinase C ( PKC) is an essential signaling substance in the early protection of cells in pre-conditioning.This study was to investigate the role of PKC in the myocardial cells of the rat model of anoxia -reoxygenation (A-R) in-jury preconditioned with sufentanil . Methods Primary myocardial cells isolated and cultured for 5 days were allocated to a control , an A-R, a sufentanil preconditioning ( SF) , and a phorbol+sufentanil preconditioning ( PMA +SF) group.The A-R injury model was established with cultured myocardial cells from neonatal rats , which were preconditioned with sufentanil at the concentration of 0.000 3 μmol/L in the SF group or phorbol followed by sufentanil 10 minutes later in the PMA +SF group.Then the proliferation of the cells was detected , the optical density of the Cx 43 protein observed by immunofluorescence confocal technology , the apoptosis rate of the cells determined by flow cytometry, and the total Cx43 proteins calculated by Western blot. Results Cell proliferation was signifi-cantly increased in the A-R, SF, and PMA+SF groups as compared with the control (P<0.05), higher in the SF and PMA +SF than in the A-R group (0.498 0 ±0.0432 4 and 0.7240 ±0.1234 vs 0.325 8 ±0.023 5, P<0.05), and in the SF than in the PMA+SF group (P<0.05).Flow cytometry showed significantly increased rates of early , late, and total cell apoptosis in the A -R ([4.96 ±0.59], [18.77 ±0.92], and [23.73 ±0.51]%), SF ([5.86 ±0.38], [10.37 ±0.38], and [16.23 ±0.32]%), and PMA+SF group ([5.71 ±0.58], [5.54 ±0.43], [11.24 ±0.62]%) as compared with the control (P<0.05), remarkably lower in the SF and PMA +SF than in the A-R group (P<0.05), and the late and total cell apoptosis rates markedly lower in the SF than in the PMA+SF group (P<0.05). Conclusion Sufentanil has a protective effect and PKC agonists combined with sufentanil may add to the effect on myocardial cells in A -R injury.

ObjectiveTo investigate the surgical management of left renal vein entrapment syndrome.MethodsEight cases with left renal vein entrapment syndrome (5 males and 3 female ; mean age 26 years) with history of gross hematuria for 3 to 46 months were reviewed.Doppler ultrasound reports suggested compression of the left renal vein at mesenteric angle in all cases.And the dilated segment of the left vein was three-fold than the stricture segment in diameter.CT scan showed the abnormal angle between aorta and superior mesentery artery in all cases.Bleeding from the left ureteral orifice was detected by cystoscopy in 6 cases.We treated 8 patients by extravascular stent immobilization with laparoscope.ResultsThe operation was successful in the 8 cases without surgical complications.The average operation time was 63 min.The average blood loss was 14 ml,and the average hospital stay after operation was 6 days.Follow-up of 3 -20 months,there was no hematuria relapse since been relieved in 7 cases,one case remained microscopic hematuria.Color Doppler ultrasound examination in all 8 cases showed the narrowest inner diameter of left renal vein was 7.4 mm (6.5 - 8.7 mm),the blood flow was smooth.The angle between abdominal aorta and superior mesenteric artery become normal.Conclusions Laparoscopic left renal vein extravascular stenting could be a new surgical method to treat left renal vein entrapment syndrome.The method of putting artificial blood vessel around renal vein is simple,safe and effective.

OBJECTIVEThe aim of this study was to investigate the korrosionsneigung of three metal specimens for casing removable denture by means of electrochemical method.

METHODSThree kinds of test specimens were prepared, including cobalt-chromium alloy, nickel-chrome alloy with titanium and pure titanium. Then they were analyzed via linear polarization in artificial saliva simulating oral environment. From this electrochemical test the polarization curves of these kinds of specimens were recorded. Then the scanning electron microscope (SEM) and X-ray diffractometer (XRD) were applied to assess the morphology and phase changes before and after electrochemical corrosion.

RESULTSNo typical Tafel curve had been recorded for pure titanium, other than cobalt-chromium alloy and nickel-chrome alloy with titanium. Nickel-chrome alloy with titanium got more negative corrosion potential and higher corrosion current than cobalt-chromium alloy. Via SEM, the obvious changes were observed on the morphology and phase before and after corrosion on cobalt-chromium and nickel-chrome alloy with titanium specimens while pure titanium having no change. The XRD provided us little changes on these all three materials.

CONCLUSIONThe results confirm that the korrosionsneigung of the studied cobalt-chromium alloy in artificial saliva is lower than that nickel-chrome alloy with titanium. Pure titanium is the most stable one of the three materials and is extreme hard to be etched.

Objective This study is aimed to explore the effect of rhTNFR:Fc and methotrexate (MTX)-rhTN FR:Fc on joint destruction of collagen-induced arthritis ( CIA ) rat by establishing CIA rat model which imitates pathogenic factors of rheumatoid arthritis (RA).Methods CIA rat model were developed by subcutaneous injection of bovine type Ⅱ collagen.The rats with inflammation scores of two or above were randomly divided into four groups:the sterilized water treatment group (0.4 ml/w,intra-peritoneal injection),the MTX treatment group (1 mg/w,intra-peritoneal injection),the rhTNFR:Fc treatment group(0.8 mg Biw,intra-peritoneal injection),the MTX + rhTNFR:Fc treatment group (MTX 1 mg/w and rhTNFR:Fc 0.8 mg Biw,intraperitoneal injection).After treatment for 8 weeks,the rats were sacrificed and took the ankle radiography.Micro-CT scan of proximal tibia was performed and hard-tissue slices were made,and then the ankle's bone damage of each group was observed in order to evaluate trabecular variation and bone quantity changes of proximal tibia.Statisstical analysis was conducted with ANK-q test.Results After treatment for 8 weeks,the percentage of trabecular area and the trabecular number of the rhTNFR:Fc treatment group and the MTX-rhTNFR:Fc treatment were [(29.1±0.3)％,(26.7±0.6)％,(4.4±0.5)/mm,(4.0±0.6)/mm] (P＜0.01),which were evidently higher than the sterilized water treatment group and MTX treatment group (P＜0.01).The trabecular separation of Etanercept treatment group and MTX-rhTNFR:Fc group was obviously less than the sterilized water treatment group and MTX treatment group [(12.9±0.5)％,(13.2±0.4)％ vs (2.0±0.3)/mm,(2.2t0.2)/mm] (P＜0.01).Conclusion rhTNFR:Fc and MTX-rhTNFR:Fc can remarkably inhibit joint destruction of CIA rat.And their effect on inhibiting of inflammation and increasing peri-articular bone quantity.In addition,they are effective on inhibiting the reduction of local trabecular structure and increase of trabecular separation.

To investigate the influence of Drynaria total flavonoids on proliferation and apoptosis of osteoblasts in tumor necrosis factor-α (TNF-α)- mediated medium, so as to explore the mechanism of Drynaria total flavonoids in preventing and treating osteoporosis of rheumatoid arthritis.