AIM: To analyze T cell clonality in patients with T cell acute lymphoblastic leukemia (T-ALL). METHODS: The complementarity determining region 3 (CDR3) size of 24 T cell antigen receptor variable ? (TCR V?) region gene was analyzed in peripheral blood mononuclear cell (PBMC) samples from 6 T-ALL cases and 10 normal individuals by using reverse transcriptase-polymerase chain reaction (RT-PCR). The PCR products were further studied by genescan and sequencing analysis. RESULTS: Some TCR V? subfamily T cells display mono- or oligoclonal expansions in 3 cases of T-ALL, predominantly in V?2, V?3, V?6, V?9, V?21 or V?24, respectively. Polyclonal expansions of T cells were found in the other three cases, which could also be found in normal samples. CONCLUSION: A part of T cell acute lymphoblastic leukemia cells may arise from a clonal expansion of TCR V? subfamily T cell. This method may be useful for the detection of minimal residual disease in clinical study of the disease.

AIM: To analyze T cell clonality in patients with T cell acute lymphoblastic leukemia (T-ALL). METHODS: The complementarity determining region 3 (CDR3) size of 24 T cell antigen receptor variable β (TCR Vβ) region gene was analyzed in peripheral blood mononuclear cell (PBMC) samples from 6 T-ALL cases and 10 normal individuals by using reverse transcriptase-polymerase chain reaction (RT-PCR). The PCR products were further studied by genescan and sequencing analysis. RESULTS: Some TCR Vβ subfamily T cells display mono- or oligoclonal expansions in 3 cases of T-ALL, predominantly in Vβ2, Vβ3, Vβ6, Vβ9, Vβ21 or Vβ24, respectively. Polyclonal expansions of T cells were found in the other three cases, which could also be found in normal samples. CONCLUSION: A part of T cell acute lymphoblastic leukemia cells may arise from a clonal expansion of TCR Vβ subfamily T cell. This method may be useful for the detection of minimal residual disease in clinical study of the disease.

Aim To investigate the expression of stro-mal interaction molecule 1 (STIM1) in rat pulmonary arterial hypertension ( PAH ) tissues and effects of STIM1 on arterial muscle cells proliferation. Methods PAH was induced by a single intraperitoneal injec-tion of MCT at a dose of 60 mg·kg - 1 . The mRNA or protein expressions of STIM1 in monocrotaline-induced pulmonary hypertensive rats were measured by real-time PCR or Western blot, respectively. The arterial smooth muscle cells A7R5 were transiently transfected with STIM1 plasmids to prepare STIM1 overexpressed cells. Cell proliferations were detected by using CCK-8 kits. The expressions of Akt/ mTOR pathway molecules of A7R5 were measured by Western blot. Results The right ventricular systolic blood pressure ( RVSP) and right ventricular mass index ( RVMI ) were markedly elevated in MCT-treated rats (P < 0. 01) in comparison to control rats. The mRNA and protein ex-pression levels of STIM1 in monocrotaline-induced pul-monary hypertensive rats were 2. 19 and 1. 66 folds of control rats, respectively. STIM1 were transiently over-expressed in cultured A7R5. Cells transfected with STIM1 grew more quickly than non-transfected control. Overexpression of STIM1 significantly increased the phosphorylation of Akt, mTOR, p70-S6K, and 4E-BP1, but did not change their protein expression lev-els. Conclusion STIM1 are over-expressed in rat PAH tissues. Overexpression of STIM1 can promote ar-terial smooth muscle cells proliferation by regulating Akt/ mTOR pathway.

Objective The aim of this prospective observational study was to analyze the prevalence and the predictive factors of hemorrhagic events after abdominal paracentesis in patients with acute-on-chronic liver failure (ACLF).Methods ACLF patients who received at least one episode of abdominal paracentesis were prospectively enrolled between January 2010 to December 2013. Prevalences of intraperitoneal and abdomen hemorrhage complications were examined. t test was performed for continuous variables and chi-square test was performed for categorical variables.Binary Logistic regression was used to analyze the risk factors of hemorrhage.Results A total of 525 abdominal paracenteses were carried out on 185 ACLF patients within a 4-year period,with 289 (55 .0%)for diagnostic purpose and 236 (45 .0%)for therapeutic purpose.A total of 16 (3.0%)hemorrhagic complications were identified, with 4 cases of abdominal wall hematomas and 12 cases of intraperitoneal hemorrhage.Patients were divided into hemorrhage group and non-hemorrhage group according to this complication.Age,gender, Child-Pugh score,volume of ascitic fluid removed,underlying cirrhosis,platelet count and thrombin time were not significantly different between two groups (all P > 0.05 ).Patients with bleeding events had lower fibrinogen levels and higher prothrombin time,international normalized ratio,activated partial thromboplastin time and model for end-stage liver disease score (all P <0.05).After adjustment of other factors,multivariate regression analysis indicated that low fibrinogen level was the only independent predictor of hemorrhagic complication (OR=0.105,95%CI :0.018-0.608,P =0.012).Conclusion Low fibrinogen level is the independent predictor of severe hemorrhagic complications following paracenteses in patients with ACLF.

Aim To investigate the effect of store-oper-ated calcium channel( SOCC) on autophagy in rat arte-rial smooth muscle cells A7 R5 . Methods Lentiviruses containing STIM1 or Orai1 gene were packaged in 293 T cells and then were used to infect rat arterial smooth muscle cells A7 R5 . The expression levels of STIM1 , Orai1 and Beclin 1 , a critical autophagy-regu-lating protein, of lentivirus-infected A7R5 cells, were detected by Western-blot. Autophagy in lentivirus-in-fected A7 R5 cells was induced by starvation or rapamy-cin, an inhibitor of mammalian target of rapamycin ( mTOR ) . Autophagy marker LC3 of these cells was detected by Western-blot. Results The constructions of vector pLV-STIM1 and pLV-Orai1 were confirmed by restriction enzymes digestion analysis. Compared with the control group, expressions of STIM1 or Orai1 protein was significantly increased after lentivirusLV-STIM1 and LV-Orai1infection, whereas the expressions of autophagy related protein Beclin-1 were down-regu-lated. Starvation or rapamycin stimulated A7R5 auto-phagy but overexpression of STIM1 or Orai1 significant-ly inhibited starvation or rapamycin induced autoph-agy. Conclusion Overexpression of store-operated calcium channel components STIM1 and/or Orai1 in rat arterial smooth muscle cells A7 R5 inhibit autoph-agy. This mechanism might contribute to the develop-ment of pulmonary arterial hypertension.

We transformed the fip-fve gene into Pichia pastoris GS115 for inducible and constitutive expression to obtain feasible bioactvie recombinant Fip-fve. The fip-fve gene was cloned from Flammulina velutipes fruting body by PCR and ligated to pPIC9 to construct inducible expression vector pPIC9-FIP-fve, and promotor pgap was used to replace the paox1 to construct constitutive expression vector pPIC9-PGAP-FIP-fve. These two vectors were used to transform P. pastoris by PEG method. The fip-fve was expressed after histamine-absence screening and yeast colony PCR. The inducible expression level reached 158.2 mg/L at the fourth day and the constitutive expression level was 46.3 mg/L and 29.5 mg/L using glucose and glycerol, respectively. The SDS-PAGE and Western blotting both proved the correctness of rFip-fve, and the hemagglutination test indicats the rFip-fve's bioactivity.
Electrophoresis, Polyacrylamide Gel ; Flammulina ; chemistry ; Fungal Proteins ; biosynthesis ; Genetic Vectors ; Pichia ; metabolism ; Polymerase Chain Reaction ; Promoter Regions, Genetic ; Recombinant Proteins ; biosynthesis

OBJECTIVETo investigate low density lipoprotein receptor (LDLR) function and gene mutation in Chinese patients with familial hypercholesterolemia(FH).

METHODSLymphocytes were isolated from 10 ml anticoagulated peripheral blood of the patients, then a flow-cytometric method (FCM) with 1,1'-dioctadecyl-3,3,3', 3-tetramethylindocarbocyanine perchlorate labelled low density lipoproetin (DiI-LDL) was used to identify the function of LDLR on the surface of lymphocytes. Genomic DNA was isolated from whole blood of FH patients and analyzed by PCR-single strand conformation polymorphism (SSCP) and nucleotide sequencing methods.

RESULTSDefects of binding and uptaking of LDLR were identified by FCM in 2 FH patients in one family, and their parents were examined in the present study. Then they were analyzed genetically. The detected mutation was a deletion of A, which caused a frame shift in codon 297 of exon 6 and introduced a beforehand stop codon in codon 369.

CONCLUSIONA novel mutation of LDL receptor gene was detected by the combination of FCM and PCR-SSCP methods.

Adult ; Base Sequence ; Child ; Child, Preschool ; China ; Cholesterol ; blood ; Cholesterol, HDL ; blood ; DNA ; chemistry ; genetics ; DNA Mutational Analysis ; Family Health ; Female ; Flow Cytometry ; Genotype ; Humans ; Hyperlipoproteinemia Type II ; blood ; genetics ; Lipoproteins, HDL ; blood ; Male ; Molecular Sequence Data ; Mutation ; Pedigree ; Phenotype ; Polymorphism, Single-Stranded Conformational ; Receptors, LDL ; genetics ; metabolism ; Triglycerides ; blood

The TCR Vbeta 24 subfamily genes were amplified in peripheral blood and bone marrow mononuclear cells from 5 cases with acute monocytic leukemia (AML-M(5)) using RT-PCR, to observe the distribution of TCR Vbeta subfamilies. The results indicated that 1 - 19 Vbeta subfamily T cells could be identified in different samples from AML-M(5) cases. The variation of distribution of TCR Vbeta subfamily T cells could be found in different individual samples. The results provided the feature of cell immune function change in skewed distribution of TCR Vbeta subfamily T cells from peripheral blood and bone marrow of patients with AML-M(5).

Objective:To evaluate the difference of dosimetry between three-dimensional and two-dimensional plans based on CT images of occult perforation in brachytherapy of cervical cancer, aiming to provide clinical reference.Methods:A total of 817 patients with cervical cancer received simple intrauterine (intrauterine tandem plus vaginal colpostats) three-dimensional brachytherapy in Chongqing University Cancer Hospital from January 2019 to December 2020 were retrospectively reviewed. Among them, 16 patients had occul uterine perforation. Based on Oncentra Brachy Therapy plan system, the single prescription dose was 6Gy. Three-dimensional (3D group) and two-dimensional (2D group) plans were designed on the perforated CT images The target volume, conformal index (CI), conformal index coformity index (COIN) and organs-at-risk (OAR) D 2cm 3 parameters were used to assess the plans between two groups. Results:The incidence of pccult uterine perforation was 1.96%(16/817) during brachytherapy for cervical cancer. The volume of prescription dose curve in the 3D group was (40.74±14.98) cm 3, significantly smaller compared with (91.46±19.71) cm 3 in the 2D group ( P<0.05), whereas the volume of the high-risk clinical target area wrapped by prescription dose curve did not significantly differ between two groups ( P>0.05). The CI and COIN in the 3D group were 0.79±0.10 and 0.72±0.96, significantly higher compared with 0.38±0.09 and 0.37±0.18 in the 2D group (both P<0.05). The D 2cm 3 of bladder, rectum, sigmoid colon, small intestine in the 3D group were (306.06±77.57) cGy, (252.27±72.60) cGy, (127.25±62.84) cGy and (228.79±94.90) cGy, significantly lower than (548.03±164.21) cGy, (411.16±118.74) cGy, (227.45±94.48) cGy and (450.95±157.96) cGy in the 2D group (all P<0.05). Conclusions:Application of image guidance in brachytherapy of cervical cancer is helpful to detect occult uterine perforation. When occult uterine perforation occurs, the use of three-dimensional plan can basically meet the clinical needs, which is significantly better than the two-dimensional plan.

Background: Cervical cancer is still present a major public health problem, especially in developing countries. In International Federation of Gynaecology and Obstetrics 2018, allowing assessment of retroperitoneal lymph nodes by imaging and/or pathological findings and, if deemed metastatic, the case is designated as stage IIIC (with r and p notations). Patients with lymph node metastases have lower overall survival (OS), progression free survival (PFS), and survival after recurrence, especially those who have unresectable macroscopical positive lymph nodes. Retrospective analysis suggests that there may be a benefit to debulking macroscopic nodes that would be otherwise difficult to sterilize with standard doses of radiation therapy. However, there are no prospective study reporting that resecting macroscopic nodes before concurrent chemoradiation therapy (CCRT) would improve PFS or OS of cervical cancer and no guidelines for surgical resection of bulky lymph nodes. The CQGOG0103 study is a prospective, multicenter and randomized controlled trial (RCT) evaluating lymph node dissection on stage IIICr of cervical cancer. Methods Eligible patients are histologically confirmed cervical squamous cell carcinoma, adenocarcinoma, adeno-squamous cell carcinoma. Stage IIICr (confirmed by computed tomography [CT]/magnetic resonance imaging/positron emission tomography/CT) and the short diameter of image-positive lymph node ≥15 mm. 452 patients will be equally randomized to receive either CCRT (pelvic external-beam radiotherapy [EBRT]/extended-field EBRT + cisplatin [40 mg/m2] or carboplatin [the area under curve=2] every week for 5 cycles + brachytherapy) or open/minimally invasive pelvic and para-aortic lymph node dissection followed by CCRT. Randomization is stratified by status of para-aortic lymph node. The primary endpoint is PFS. Secondary endpoints are OS and surgical complications. A total of 452 patients will be enrolled from multiple hospitals in China within 4 years and followed up for 5 years.