Objective To study the effects of potassium channel blocker,tetraethylammonium(TEA) on the proliferation and apoptosis of ovarian cancer cell line SKOV3.Methods SKOV3 cells were treated with TEA.The effect of TEA on proliferation of SKOV3 cells was assessed by MTT assay.Hoechst 33258 fluorescein staining and flow cytometry(FCM) were employed in detection of SKOV3 cells apoptosis.Results TEA(1,5,10 and 20mmol/L) can significantly inhibit the proliferation of SKOV3 cells,the inhibitory rates were 8.61%,18.86%,46.63% and 65.22%,respectively(P

Objective To investigate the effects of 5-Aza-2'-deoxycytidine (5-Aza-CdR) on the apoptosis of A549/DDP cells and the expression of hMLH1 gene.Methods A549/DDP cells were treated with 5-Aza-CdR at 0.5,5,50 μmol/L.The growth curve of A549/DDP cells was investigated by MTT assay.The methylation status of hMLH1 gene was detected by methylation specific PCR (MSP).The expression of hMLH1 mRNA was evaluated by FQ-PCR.The apoptosis rate of A549/DDP cells was analyzed by flow cytometry.Results A549/DDP cells treated with 5-Aza-CdR showed a slow growth in comparison with the control cells,and the growth rates were decreased with the increasing of 5-Aza-CdR concentration.The apoptosis rate after treatment was higher than that before treatment in A549/DDP cells (P ＜ 0.05),and had a positive correlation with 5-Aza-CdR dose (P ＜ 0.001).hMLH1 mRNA expression level was increased in a 5-Aza-CdR concentration dependent manner (P ＜ 0.05).hMLH1 promoter in A549/DDP cells was methylated and hMLH1 mRNA was negatively expressed before treatment,but the mRNA was positively expressed after treatment with 5-Aza-CdR.Conclusions 5-Aza-2'-CdR can induce apoptosis of A549/DDP cells by inducing demethylation of hMLH1 promoter and thereby enhancing hMLH1 gene expression and its tumor suppressor function.

Objective To observe the efficacy and adverse effects of conventionally fractionated (CF) versus hypofractionated (HF) three-dimensional conformal radiotherapy (3DCRT) for hepatocellular carcinoma (HCC) with portal vein tumor thrombosis.Methods A retrospective analysis was performed on the clinical data of 65 patients with HCC suitable for 3DCRT from 2008 to 2012.These patients were randomly divided into HF group (n =32) and CF group (n =32).The HF group received 3DCRT at a total dose of 45-55 Gy (3-4 Gy/fraction,3-5 fractions/week),while the CF group at a total dose of 40-56 Gy (2 Gy/fraction,5 fractions/week).Results The follow-up rate was 100％.For the HF group and CF group,the short-term response rates were 72％ vs.55％ (P =0.034),the 1-year local control rates were 72％ vs.55％ (P=0.034),the 1-year overall survival rates were 59％ vs.45％ (P=0.042),and the numbers of individuals with grade 1-2 acute gastrointestinal reactions,deterioration of liver function,and radiation hepatitis were 14 vs.11,8 vs.8,and 1 vs.0,respectively (P =0.237).Conclusions HF 3DCRT is superior to CF 3DCRT in the treatment of HCC.

Esophageal cancer with eyeball metastasis is scarce,and the clinical diagnosis is based on ul-trasound.The treatment method is surgical removal at present.Our focus is through other local or systemic treat-ment to protect eyeball,protect the integrity intact and facial appearance.One patient's clinical data with esopha-geal eyeball metastasis from the People′s Liberation Army Cancer Center of No.105 Hospital was included.The patient was completed“enucleation of the right side of eyeball” by ultrasound diagnosis.The results of pathologi-cal suggested that poorly differentiated squamous cell carcinoma metastasis in the eye.Eyeball metastases′s opera-tion was received a good recovery after 2 months and there was no recurrence.In the present paper,we discuss e-sophageal eyeball metastases clinical characteristics and methods of diagnosis and treatment combined with the lit-erature.

Objective Investigate the Protective effect of paeoniflorin in rats with acute liver injury. Methods Male SD rats were randomly divided into normal group, model group, paeoniflorin in small, middle and high dose group (20 mg/kg, 40 mg/kg, 80 mg/kg), paeony glycoside group (50 mg/kg). Except normal group, the rest of groups were irradiated fractionally by VARIN 21-EX linear accelerator at right liver, The paeoniflorin group and paeony glycoside group were lavaged everyday after irradiation for corresponding drugs and doses. Normal group and model group give equal volume normal saline everyday. All rats were killed on 2nd and 4th weekend. Measure rats serum AST, ALT, hepatic tissue GSH, SOD, and HE staining score. Results The rats in model group liver tissue HE staining scores increased to(2.25±0.53)on 2nd weekend, The serum levels of AST, ALT increased to(112.83±19.20)U/L, (80±21.97)U/L, it significantly increased Compared with the normal group(63.06±7.15)U/L, (42.30±4.45)U/L, P<0.01. The liver GSH contents of paeoniflorin in each dosage groups rats were(60.89±8.43)U/mg, (67.84±9.05)U/mg, (71.92±8.11)U/mg on 2 nd weekend, Compared with the model group(37.32±11.25)U/mg, (90.54±12.12)U/mg, P<0.05或<0.01. Conclusions The irradiated rats go into acute liver injury on 2nd weekend, paeoniflorin has protective effect on acute liver injury in rats.

To examine the substrate specificity of carotenoid 3',4'-desaturase (DR2250) from Deinococcus radiodurans, we amplified the dr2250 gene by using PCR methods. The PCR products were digested by Hind III-BamH I and ligated into the vector pUC19, yielding recombinant vector pUC-CRTD. We analyzed the carotenoids of E. coli transformants containing pACCRT-EBI(Eu) and (or) pRK-CRTC and (or) pUC-CRTD. Our results demonstrated that DR2250 had substrate specificity on the carotenoids with hydroxyl group at C1 (1').
Carotenoids ; biosynthesis ; genetics ; metabolism ; Deinococcus ; enzymology ; genetics ; Escherichia coli ; genetics ; metabolism ; Oxidoreductases ; metabolism ; Substrate Specificity

OBJECTIVETo study the influence of the sequence of three-dimensional conformal radiotherapy (3DCRT) and transcatheter arterial chemoembolization (TACE) on the efficacy and toxicity of treatment in patients with hepatocellular carcinoma (HCC) with portal vein tumor thrombus (PVTT).

METHODSA total of 65 patients who were diagnosed with primary HCC with PVTT were enrolled in the study from November 2008 to March 2012 and were randomly divided into the following two groups:group A,32 patients treated with 3DCRT followed by TACE; group B,33 patients treated with TACE followed by 3DCRT.

RESULTSThe total efficacy rates of groups A and B were 68.8% and 69.7% (x² =0.232, P < 0.793). The survival rates,effective percentage of PVTT and AFP remission rates were not significantly different between group A and group B.The exacerbation rate of liver function was significantly higher for group B than for group A (P < 0.05). No serious complication was found in the follow-up period for either group.

CONCLUSIONThe combination of 3DCRT and TACE is a relatively effective local treatment for patients with primary HCC and PVTT.Compared with TACE followed by 3DCRT, 3DCRT followed by TACE may have a negative influence on liver function.

Arteries ; Carcinoma, Hepatocellular ; Chemoembolization, Therapeutic ; Combined Modality Therapy ; Humans ; Liver Neoplasms ; Portal Vein ; Radiotherapy, Conformal ; Survival Rate ; Thrombosis ; Treatment Outcome

Objective To verify and evaluate the prognostic models for extranodal natural killer/T-cell lymphoma, nasal type (ENKL). Methods ENKL patients in the 105th Hospital of PLA from January 1990 to December 2015 were retrospectively analyzed, and patients were followed to the August 2016 through telephone and medical records. The models were evaluated by C-index, and the prognostic ability of each factor was assessed by survival curves. Results A total of 76 patients met the inclusion criteria, with a median age of 41.9 years old (range, 14-74 years old), all patients received chemotherapy, and 49 received radiation therapy. During the median observation time (37.0 months), 37 patients died in a median of 28.4 months. The prognostic factors of Eastern Cooperative Oncology Group performance status (ECOG PS) score, level of lactate dehydrogenase (LDH) and Ann Arbor staging were the influencing factors of overall survival in the univariate survival analysis (all P<0.05), and only ECOG PS score was significant in the multivariate Cox regression (OR: 4.231, 95 ％ CI 2.172-8.240, P= 0.000). C-index of international prognostic index (IPI) was 0.541 (95 ％ CI 0.534- 0.555), and those of model with ECOG PS score, Ann Arbor staging, primary lesion invasion, LDH and age as the indicators and model with ECOG PS core, Ann Arbor staging, primary lesion invasion, LDH and hemoglobin as the indicators were both 0.726 (95 ％ CI 0.626-0.826). Conclusion Both model with ECOG PS score, Ann Arbor staging, primary lesion invasion, LDH and age as the indicators and model with ECOG PS core, Ann Arbor staging, primary lesion invasion, LDH and hemoglobin as the indicators can accurately predict the prognosis of patients with ENKL and are significantly better than the IPI model.

Objective To investigate the short-term clinical efficacy and adverse reactions of stereotactic radiotherapy (SRT) in the treatment of locally recurrent non-small cell lung cancer (NSCLC).Methods Clinical data of 120 cases of recurrent NSCLC after radiotherapy admitted to our hospital from October 2009 to October 2015 were retrospectively analyzed.SRT was adopted for further radiotherapy.The prescription dose was 50％ dose curve surrounding the target area.The total dose was 40-50 Gy,with a single dose of 4-5 Gy for 8-12 times.The chest CT was re-examined every 2 months after radiotherapy.The short-term clinical efficacy and adverse reactions were evaluated.The changes of Karnofsky performance score (KPS) and quality of life (QOL) were recorded before and after radiotherapy.Results One patient terminated the radiotherapy due to grade 3 acute radiation-induced pneumonia,25 patients (21.0％) obtained complete remission (CR),61 cases (51.3％) of partial remission (PR),19 cases (16.0％) of stable disease (SD),14 cases (11.8％) of progress disease (PD),86 cases (72.3％) of objective remission rate (CR+PR),and 105 cases (88.2％) of disease control (CR+PR+SD),respectively.Thirty-one patients experienced radiation-induced pneumonia,23 cases of radiation-induced myelosuppression and 1 case of acute radiation-induced heart injury.All these adverse reactions were mitigated after symptomatic treatment.The KPS was significantly increased from 68.16±15.22 before SRT to 78.39± 11.50 after SRT (P＜0.05).The QOL was considerably elevated from 27.58±5.37 prior to SRT to 38.16±8.39 following SRT (P＜0.01).Conclusion SRT is an efficacious and safe treatment of locally recurrent NSCLC,which yields controllable and tolerable adverse reactions and enhances the QOL of patients.

OBJECTIVE To establis h and validate a population pharmacokinetic model of docetaxel in malignant tumor patients. METHODS The clinical data of malignant tumor patients treated with chemotherapy regimen containing docetaxel in our hospital from June 2019 to December 2021 were retrospectively collected . According to the results of blood concentration detection ， based on the three -compartment model the nonlinear mixed effect model （NONMEM）was used ；covariates（age，weight，height， body surface area ，Karnofsky performance scale ，total protein ，albumin，total bilirubin ，aspartate aminotransferase ，alanine aminotransferase and serum creatinine ）affecting clearance （CL）were screened by “forward inclusion and backward exclusion ”； the population pharmacokinetic model of docetaxel was established . The model was tested for goodness -of-fit diagnosis and internal validation by Bootstrap . RESULTS A total of 264 measured blood concentrations of 132 patients with malignant tumors during chemotherapy were included . The covariates that had significant effect on CL of docetaxel were serum creatinine and total bilirubin （P＜0.01）. The results of Bootstrap analysis （parameter median values and 95% confidence intervals ）were close to predict results of the established model ；the final model estimated that the population typical value of docetaxel CL was 37.82 L/h. CONCLUSIONS The population pharmacokinetic model of docetaxel in malignant tumor patients is established successfully ， which can be used for the formulation and optimization of clinical individualized regimen .