Objective To investigate the expression and clinical significance of leptin receptor (OBR) and phosphorylation of signal transducer and activator of transcription (p-STAT3) in patients with diffuse large B-cell lymphoma (DLBCL).Methods Immunohistochemical analysis was used to detect the expression of OBR and p-STAT3 in 80 patients with DLBCL and 10 patients with reactive lymphoid hyperplasia (RLH).Using a panel of immunohistochemical markers (CD10,bcl-6 and Mum-1),all cases of DLBCL were further divided into two groups,GCB (germinal center B-cell-like) or non-GCB.Results Immunohistochemistry revealed high expression of OBR and p-STAT3 in 45.0 ％ (36/80) and 28.8 ％ (23/80) cases of DLBCL,respectively,and minimal straining in 100.0 ％ (10/10) cases of RLH (P ＜ 0.05).Compared with GCB group (8.7 ％,2/23),non-GCB group had higher p-STAT3 high expression rate (36.8 ％,21/57) (P ＜ 0.05).There was no significant difference in the expression of OBR between these two groups.Compared with clinical stage Ⅰ-Ⅱ [46.2 ％ (18/39) and 25.6 ％ (10/39)],stage Ⅲ-Ⅳ had higher OBR and p-STAT3 high expression rate [61.9 ％ (13/21) and 38.1％ (8/21)] (P ＞ 0.05).The expression of OBR and p-STAT3 were not correlated with age,gender,extranodal infiltrations,LDH level,B-symptoms and IPI(international prognostic index)(P ＞ 0.05).The expression of OBR was positively related with that of p-STAT3 in DLBCL patients (r =0.232,P =0.039).Conclusion OBR could stimulate the JAK-STAT signaling pathway and induces the phosphorylation of STAT3.This may be involved in carcinogenesis and prognosis of DLBCL.

Objective To investigate the expressions of CXCR4,MMP-2 and VEGF in pancreatic carcinoma and the relationship with biological behavior of pancreatic carcinoma.Methods Immunohistochemical PV6000 technique was used to detect the expression of CXCR4,MMP-2 and VEGF in 47 cases of pancreatic carcinoma tissues,and the relationship between the expressions and pathologic parameters,and the relationship among the expressions of the 3 proteins were analysed.Results The expression rates of CXCR-4,MMP-2 and VEGF were 72.3%,66.O%and 61.7%in pancreatic carcinoma tissues,and all these proteins were correlated with metastasis,clinical staging and prognosis(X2=5.84～12.69;P＜0.05).The expression of CXCR-4,MMP-2 and VEGF was not correlated with sex,age,tumor size and differentiation(X2=0.03～4.27;P＞0.05).There was a positive relationship between the expression of CXCR-4 and MMP-2 or VEGF in pancreatic carcinoma(r=0.587,0.521;P＜0.01).Conclusions CXCR-4 could up-regulate the expression of MMP-2 and VEGF in pancreatic carcinoma,and they may contribute to metastasis and invasion of pancreatic carcinoma.

OBJECTIVETo study the antiproliferative effects of beta-sitosterul and its mechanism in hepatoma HepG2 cells.

METHODCell proliferation was assessed by MTT assay. Cell cycle distribution, apoptosis and mitochondrial membrane potential were measured by high content screening (HCS). The protein expression of caspase-3, caspase-8, caspase-9, Bcl-2, Bax, tBid and cytochrome c in the HepG2 cells were evaluated by Western Blots.

RESULTbeta-Sitosterul exerted significant antiproliferative effects in HepG2 cells. Furthermore, beta-sitosterul also induced HepG2 cells apoptosis, lost mitochondrial membrane potential, activated caspase-3, caspase-8 and caspase-9, up-regulate Bax, tBid protein, down-regulation Bcl-2 protein. However, beta-sitosterul had hardly any effects on QSG7701 cells.

CONCLUSIONbeta-Sitosterul exerted antiproliferative effects and induced HepG2 cells apoptosis via mitochondrial pathway and membrane death receptor pathway.

Antineoplastic Agents ; pharmacology ; Apoptosis ; drug effects ; Apoptosis Regulatory Proteins ; metabolism ; Carcinoma, Hepatocellular ; metabolism ; pathology ; Cell Cycle ; drug effects ; Cell Line, Tumor ; Cell Proliferation ; drug effects ; Hep G2 Cells ; Humans ; Liver Neoplasms ; metabolism ; pathology ; Membrane Potential, Mitochondrial ; drug effects ; Sitosterols ; pharmacology

Objective:To investigate the clinical effect of arthroscopic debridement combined with high lateral tibial osteotomy and Giebel plate internal fixation in the treatment of varus knee osteoarthritis.Methods:From January 2016 to June 2018, 78 patients (96 knees) with varus knee osteoarthritis in Beijing Delcony Orthopedic hospital were treated by arthroscopic debridement combined with closed lateral tibial osteotomy and Giebel plate internal fixation. The femoral tibial angle (FTA) and hospital for special surgery knee score (HSS) score of knee joint were compared before and after operation.Results:70 patients (86 knees) were followed up for 12 to 28 months, with an average of 22.4 months. Bone healing was achieved at the osteotomy site 8 to 14 weeks after operation. Pain symptoms were relieved or disappeared significantly. The force line of X-ray examination was maintained at the postoperative level. The average knee femoral tibial angle was 187.6°preoperatively and 172.5° postoperatively, which showed significant statistical difference ( P<0.05). HSS knee score criteria: excellent: 70 knees; good: 10 knees; medium: 4 knees; poor: 2 knees. The excellent and good rate was 93.0%. The HSS score increased from (69.0±3.6) before operation to (87.2±8.1) after operation, with significant difference ( P<0.05). Conclusions:Arthroscopic debridement combined with high lateral tibial osteotomy and Giebel plate internal fixation is a very good method for the treatment of varus knee osteoarthritis, which is worthy of further clinical application.

Objective:To investigate the clinicopathological characteristics of the T cell lymphomas with CD20 expression, and to better understand this rare entity.Methods:Two-hundred cases of T-cell lymphoma diagnosed in the Department of Pathology of the Affiliated Hospital of Qingdao University from November 2016 to February 2020 were examined, and 5 cases of CD20-positive T-cell lymphomas were identified and included. Combined with clinical data and review of the literature, the clinicopathological characteristics of the disease were analyzed.Results:The five patients were all male, and had an average age of 56 years (range, 47 to 64 years). There were 2 cases of monomorphic epitheliotropic intestinal T-cell lymphoma, 2 cases of mycosis fungoides (1 case was plaque stage and the other was tumor stage) and 1 case of indolent T-cell lymphoproliferative disorder of the gastrointestinal tract. Immunohistochemistry showed that all 5 cases expressed multiple T cell markers (CD3/CD4/CD5/CD7/CD8) and only one of B cell markers (CD20). Three of the 5 cases were negative for CD20 at the first diagnosis, while CD20 was diffusely positive on the second biopsy from the recurrence or progression of the disease, without expression of CD79a or PAX5. Epstein-Barr encoding region (EBER) in situ hybridization was negative in all 5 cases. T-cell receptor gene analysis showed monoclonal rearrangement of β or/and δ chains;Ig rearrangements were all polyclonal. None of the five patients were treated with rituximab, and 4 patients survived with disease and 1 patient survived without disease at the end of follow-up. Among them, the patient with mycosis fungoides at the cancerous stage has progressed rapidly and had poor quality of life.Conclusions:CD20-positive T-cell lymphoma is extremely rare. Its prognosis is closely related to the type of T-cell lymphoma, clinical stage and initial therapeutic effect. However, the expression of CD20 indicates the recurrence or progression of the disease, and the prognosis is relatively poor. When CD3 expression is absent in T-cell lymphoma, it is easy to be misdiagnosed as B-cell lymphoma. The combination of multiple immunohistochemical antibodies and molecular detection can improve the accuracy of diagnosis.

Objective:To compare the surgical efficacy and cosmetic satisfaction of the transoral endoscopic thyroidectomy by vestibular approach (TOETVA), endoscopic thyroidectomy via bilateral areola approach (BAA), and open thyroidectomy (OT) in the treatment of papillary thyroid carcinoma (PTC) in stage T1b.Methods:A total of 178 patients with PTC in stages pT1bN0M0 and pT1bN1aM0 treated from January 2017 to December 2018 were divided into TOETVA group ( n=59), BAA group ( n=43), and OT group ( n=76). The baseline characteristics, relevant indexes of surgical efficacy and follow-up data were compared between the three groups, and also the surgical efficacy indexes were compared between unilateral lobectomy + central lymph node dissection (unilateral lobectomy subgroup) and bilateral lobectomy + central lymph nodes dissection (total resection subgroup). SPSS 19.0 statistical software was used for data analysis. Results:The mean ages of patients in TOETVA group and BAA group were significantly younger than those in OT group, and the proportion of women in TOETVA group and BAA group was significantly higher than that in OT group, all P<0.05. None of patients in TOETVA and BAA groups were converted to open surgery. Among TOETVA, BAA and OT groups, there were significant differences in the mean operation time [unilateral lobectomy subgroup: (198.0±45.2) min, (162.0±36.9) min and (79.4±28.6) min, P<0.05; total resection subgroup: (230.0±36.0) min, (219.8±68.1) min and (102.8±40.0) min, P<0.05], in total drainage volume [unilateral lobectomy subgroup: (195.0±55.6) ml, (178.1±50.4) ml and (127.0±30.1) ml, P<0.05; total resection subgroup: (221.1±46.7) ml, (245.3±71.2) ml and (137.7±41.6) ml, P<0.05], and the incidence of subcutaneous ecchymosis in TOETVA group or BAA group was higher than that in the OT group [5.1% (3/59), 11.6% (5/43) vs. 0, χ 2=3.952 and 9.225 respectively, both P<0.05]. The mean level of C-reactive protein in TOETVA group was higher than that in OT group [(16.8±10.7) vs. (9.5±6.9), P<0.05]. Following-up in the third month after surgery between three groups in cosmetic satisfaction scores [(2.7±0.5) vs. (2.6±0.7) vs. (1.7±0.8)], scar self-consciousness scores (0[0,1] vs. 1[0,2] vs. 2[1,2]), and quality of life scores [(9.1±1.1) vs. (8.9±1.1) vs. (7.5±0.8)], cosmetic satisfaction and quality of life in TOETVA and BAA group were better than that in OT group, in terms of scar self-consciousness: TOETVA0.05). The median follow-up time of the three groups was 25 months (TOETVA group), 28 months (BAA group), and 32 months (OT group) respectively, without disease progression. Conclusion:TOETVA and BAA are optional surgical methods for PTC in stages pT1bN0M0 and pT1bN1aM0, with good safety and patient's cosmetic satisfaction.

Objective:To establish and validate reference intervals of serum vitamin K for healthy children in China.Methods:A cross-sectional study was conducted from January 2020 to May 2023, involving 807 healthy children aged 0 to 14 years, selected by stratified random sampling based on the population distribution of children in eastern, central, western, and northeastern China. Sample collection was carried out in 16 hospitals across 12 provinces, autonomous regions, and municipalities. Basic information of the children was collected using a standardized self-design questionnaire. Serum levels of vitamin K 1 and vitamin K 2 (menaquinone-4 (MK-4), menaquinone-7 (MK-7)) were measured using liquid chromatography-tandem mass spectrometry. The reference intervals was established by direct approach. The children were divided into different groups by age. Inter-group comparisons were conducted using the Kruskal-Wallis non-parametric test, and the reference intervals ( P2.5- P97.5) were determined using non-parametric methods. Screening 40 healthy children for small sample validation based on age groups within the reference range(25 from eastern, 10 from central, and 5 from western regions). Results:The age of the 807 children was 5.00 (2.00, 9.81) years, and 495 (61.3%) were males and 312 (38.7%) females. Reference intervals were established for 795 children, of whom 303 children were aged 1 month to 3 years and 492 were aged 4 to 14 years. The reference intervals for serum vitamin K 1 were 0.09-4.54 μg/L for children aged 1 month to 3 years, and 0.10-1.73 μg/L for 4-14 years. For MK-7, the intervals were 0.07-1.42 μg/L for 1 month to 3 years and 0.19-2.03 μg/L for 4-14 years. The reference intervals for MK-4 in children aged 1 month to 14 years were 0-0.42 μg/L. The measured values of serum vitamin K 1, MK-4, and MK-7 in the validation samples did not exceed the reference limit in more than 2 samples. Conclusion:Reference intervals for vitamin K 1, MK-4, and MK-7 in healthy children aged 1 month to 14 years have been established and validated, and can be used to assess vitamin K nutritional status in children.

Objective:To preliminarily estimate and study the effect of nucleic acid testing in blood screening on the residual risk (RR) of transfusion transmitted HBV infection (TTI HBV).Methods:Using the NAT yield/WP ratio model and adopting the relevant data of information management system of practice comparison working party in the Mainland of China, this paper analyzed the trend of the RR of TTI HBV among 18 blood centers from 2015 to 2019 in China, and compared the impact of two kinds of blood screening strategies which were ELISA+ ID-NAT/MP-NAT (individual-donation nucleic acid testing or mini-pool nucleic acid testing) and ELISA + MP-NAT on RR in 2019.Results:The overall trends of the 5-year RR of HBV among 18 blood centers showed by trend chi square test were NAT single positive rate trend χ2= 39.42( P<0.01) and residual risk trend χ2= 279.792( P<0.01); The influence on RR from the differences of ELISA+ ID-NAT/MP-NAT and ELISA+ MP-NAT was statistically significant, and chi square test showed that χ2= 7.4( P<0.01). Conclusions:Since the implementation of nucleic acid testing in the blood screening in China from 2015, the residual risk of transfusion transmitted HBV infection has decreased year by year. The observed two blood screening strategies which dominated in China may lead to discrepancy in the residual risk of TTI.