Objective:To establish a method for the simultaneous determination of 8 heavy metal elements Pb, Cd, As, Hg, Co, V, Se and Mo in iron dextran by inductively coupled plasma optical emission spectrometry ( ICP-OES) . Methods:Through the detec-tion wavelength selection,the detection wavelength was confirmed as follows:220. 353 nm for Pb, 228. 802 nm for Cd, 188. 980 nm for As, 194. 164 nm for Hg, 228. 615 nm for Co, 311. 070 nm for V, 196. 026 nm for Se and 204. 598 nm for Mo. Through optimizing the instrument parameters, the optimal radio frequency power was 1. 3 kW, the nebulizer gas flow rate was 0. 7 L·min-1, and the pump speed was 10 r·min-1. By applying the above detection parameters, the 8 heavy metal elements were analyzed by ICP-OES simultaneously. Results: The linearity of the detected elements was good, and the correlation coefficients were all greater than 0. 9990. The detection limits were from 0. 12 to 7. 26 ng·ml-1 , the quantitation limits were from 0. 40 to 23. 96 ng·ml-1 and the recoveries were from 94. 1% to 103. 4% (RSD<3%, n=9). Conclusion: The method is specific, sensitive, rapid and accurate, which can be applied in the simultaneous determination of 8 heavy metal elements in iron dextran.

Administration, Oral ; Anticoagulants ; adverse effects ; Aspirin ; adverse effects ; Epistaxis ; chemically induced ; Humans

Objective To evaluate the effect of recombinant human tumor necrosis factor receptor type Ⅱ:IgG Fc fusion protein (rhTNFR:Fc,trade name Etanercept) combined with methotrexate on levels of interleukin-17A (IL-17A) and tumor necrosis factor-α (TNF-α) in the serum and mononuclear cells of patients with moderate to severe plaque psoriasis.Methods A total of 30 patients with moderate to severe plaque psoriasis were enrolled from Department of Dermatology of Tenth People's Hospital of Tongji University between August 2014 and February 2016,and then were randomly and equally divided into Etanercept group and Etanercept + methotrexate group.The treatment lasted 24 weeks.Fifteen healthy blood donors served as healthy control group.Enzyme-linked immunosorbent assay (ELISA) and real-time quantitative PCR were performed to measure the serum levels and mRNA expression of IL-17A and TNF-α,respectively,in the patients of the above two groups before and after the treatment.Results Before the treatment,the serum levels of IL-17A and TNF-ct,as well as the mRNA expression of IL-17A and TNF-α in peripheral blood mononuclear cells (PBMCs),were all significantly higher in all the patients than in the healthy controls (all P ＜ 0.05).After the treatment,compared with the Etanercept group,the Etanercept + methotrexate group showed significantly lower serum levels of IL-17A (142.67 ± 14.82 vs.163.54 ± 23.18,P ＜ 0.05) and TNF-α (70.07 ± 25.02 vs.91.98 ± 14.62,P ＜ 0.05),as well as lower mRNA expression of IL-17A (1.12 ± 0.33 vs.1.56 ± 0.77,P ＜ 0.05) and TNF-α in PBMCs (2.50 ± 1.04 vs.3.61 ± 2.14,P ＜ 0.05).Conclusion Etanercept combined with methotrexate is superior to Etanercept alone in the treatment of psoriasis,and can reduce treatment duration and improve therapeutic effect,likely by down-regulating the expression of IL-17A and TNF-α.

OBJECTIVETo explore the molecular mechanism of CisAB01 subtype in the ABO blood group system, and to investigate the expression of A and B antigens in red blood cells (RBCs).

METHODSFor 5 unrelated individuals with the CisAB phenotype, the molecular basis for the blood type was studied with serological assay, DNA sequencing and haplotype analysis. Bioinformatics analysis was carried out to investigate the changes in structure and function of relevant enzymes. Expression of A and B antigens in RBCs of CisAB01 was detected by flow cytometry.

RESULTSAll of the 5 samples were found to have a CisAB01 subtype. The underlying mutations, 467C>T and 803G>C in exon 7, have resulted in replacement of amino acid P156L and G268A. The mean fluorescence intensity (MFI) of A antigen in CisAB01 cases was 135, while the control group was 172. The B antigens in CisAB01 cases (MFI=38) showed significant decrease in MFI compared with the control group (MFI=164).

CONCLUSION803G>C mutation of the ABO gene probably underlies the CisAB01 subtype. Fluorescence intensity of A antigens in CisAB01 subtype cases is slightly lower than the normal type, while the B antigen was significantly lower.

ABO Blood-Group System ; genetics ; Adult ; Base Sequence ; China ; Exons ; Female ; Humans ; Molecular Sequence Data ; Mutation ; Young Adult

Objective:To explore the efficacy and safety of camrelizumab combined with apatinib as the second-line treatment for patients with advanced gastric cancer.Methods:The clinical data of 19 patients with advanced gastric cancer in Hebei General Hospital from August 2019 to March 2022 were retrospectively analyzed. All patients received camrelizumab combined with apatinib as the second-line treatment. The treatment efficacy and adverse reactions were evaluated; the survival analysis was performed using Kaplan-Meier method; Cox proportional hazards model was used to analyze the influencing factors for overall survival (OS) of patients.Results:Among 19 patients, no one achieved complete remission, 4 patients (21.1%) achieved partial remission, 9 patients (47.4%) had stable disease. The objective response rate (ORR) and disease control rate (DCR) were 21.1% (4/19) and 68.4% (13/19), respectively. The ORR of patients with deficient mismatch repair (dMMR) was higher than that of patients with proficient mismatch repair (pMMR) [100.0% (2/2) vs. 11.8% (2/17), P < 0.05], and patients with programmed death receptor ligand 1 (PD-L1) combined positive score (CPS) ≥1 had a higher DCR than patients with PD-L1 CPS < 1 [100.0% (5/5) vs. 25.0% (1/4), P < 0.05]. The median follow-up time of 19 patients was 14.7 months (12.0-17.4 months), the median progression-free survival time and OS time were 2.8 months and 5.7 months (95% CI 2.4-8.9 months). Increased lactate dehydrogenase (LDH) was negatively correlated with OS ( χ2 = 10.262, P = 0.001). Multivariate Cox regression analysis showed that LDH was an independent influencing factor for the OS of patients (<250 U/L vs. ≥250 U/L: HR = 0.149, 95% CI 0.039-0.657, P = 0.005). The most common treatment-related adverse reactions were fatigue (52.6%, 10 cases), anemia (47.4%, 9 cases), thrombocytopenia (36.8%, 7 cases), rash (36.8%, 7 cases), and reactive capillary hemangioma (36.8%, 7 cases). Conclusions:Camrelizumab combined with apatinib as the second-line treatment for advanced gastric cancer have good efficacy and safety.

OBJECTIVE: To explore the molecular basis of two individuals with weak D variant of the Rh blood type. METHODS: Routine serological testing was carried out to detect the D, C, c, E and e antigens of the Rh blood group. The D antigen was further detected with an indirect antiglobulin test. The presence of Rhesus box was detected by PCR to determine the homozygosity of the RHD gene. RESULTS: Both samples were determined as weak D phenotype by the indirect antiglobulin test. DNA sequencing revealed that case 1 harbored a heterozygous 208C>T variant in exon 2 and a heterozygous 1227G>A variant in exon 9; while case 2 harbored homozygous 779A>G variants of exon 5 of the RHD gene. Case 1 was determined as RHD+/RHD+, while case 2 was determined as RHD+/RHD-. The two samples were respectively named as weak D type 122 and weak D type 149 based on the rules of Rhesus Base Nomenclature. CONCLUSION D negative blood donors should subject to indirect antiglobulin testing and molecular analysis for safer transfusion.
Alleles ; Blood Donors ; Blood Grouping and Crossmatching ; Genotype ; Humans ; Molecular Biology ; Phenotype ; Rh-Hr Blood-Group System/genetics*

OBJECTIVE To explore the molecular mechanism for a blood sample with mixed-field hemagglutination upon determination of ABO blood group. METHODS Serological techniques were employed to identify the erythrocyte phenotype. The A and B antigens were detected by flow cytometry. The preliminary genotype of ABO gene was assayed with sequence-specific primer-polymerase chain reaction (PCR-SSP). Exons 6 and 7 of the ABO gene were amplified with PCR and analyzed by direct sequencing. Haplotypes of the ABO gene were analyzed by cloning sequencing as well. RESULTS The serological reaction pattern has supported an O phenotype when all the tubes were centrifuged for the first time. However, a mixed-field hemagglutination of red blood cells (RBCs) with anti-A antibodies was present after the tube was centrifuged five times later. A antigens were detected on the surface of partial red blood cells of the sample by flow cytometry. PCR- SSP results have shown that the preliminary ABO genotype was A/O. Analysis of the fragments of exons 6 and 7 of the ABO gene has indicated that heterozygosis lied as follows: 261G/A, 425T/T, 467C/T, 646A/T, 681A/G, 745C/T, 771C/T, 829A/G, conjecturing the genotype to be A307/O02, which was confirmed by haplotype sequence analysis. Compared with A101 allele, A307 allele has two missense mutations, 467C> T and 745C> T, which have resulted in substitutions Pro156Leu and Arg249Trp in the A glycosyltransferase polypeptide chain. CONCLUSION A variant allele (A307) has been identified for the first time in mainland China, which is responsible for the formation of A3 phenotype.
ABO Blood-Group System ; genetics ; Adult ; Genotype ; Humans ; Male ; Phenotype

Objective To analyze the effects of different therapies on patient survival,to explore the related prognostic factors in elderly patients with advanced gastric cancer,and to provide recommendations for the treatment of such patients.Methods Retrospective analysis was conducted on 146 elderly patients with advanced gastric cancer hospitalized from January 2009 to October 2013 in Yixing People's Hospital of Jiangsu Province.Detailed clinical data were recorded,and patients were followed up during the total survival time.Univariate analysis with the Log rank test and multivariate analysis with the COX proportional hazard model were utilized to examine the related prognostic factors in elderly patients with advanced gastric cancer.Results The 1-,2,3-year survival rates of t46 elderly patients with advanced gastric cancer were 33.6 ％,11.0 ％,and 2.1 ％,respectively,and the median survival time was 10.3 months.The Log-rank test showed that Karnofsky (KPS) score,differentiation degree,number of metastatic sites,malignant serous effusion,chemotherapy,and traditional Chinese medicine (TCM) were associated with the prognosis of elderly patients with advanced GC (all P＜0.05).Multivariate analysis by the COX proportional hazard model showed that KPS score (HR=1.575,95％ CI:1.094 2.267,P=0.015),differentiation degree (HR=0.499,95％CI:0.340-0.732,P＜0.001),malignant serous effusion (HR=0.516,95％ CI:0.356-0.748,P＜ 0.001),chemotherapy (HR=1.669,95％ CI:1.185 2.351,P=0.003),and TCM (HR=1.793,95％ CI:1.237-2.600,P=0.002) were independent factors related to the prognosis of elderly patients with advanced GC.Conclusions The prognosis of elderly patients with advanced gastric cancer is poor,especially for patients with a low KPS score,a poor differentiation degree,or malignant serous effusion.Chemotherapy and TCM can improve the prognosis.

Objective:To explore the quantitative analysis value of diffusion tensor imaging (DTI) for early changes of calf muscle in type 2 diabetes mellitus (T2DM) patients without peripheral ischemia.Methods:From September 2018 to March 2019, 20 male T2DM patients (age: 45-64 years) without peripheral ischemia and 20 matched male healthy controls (age: 46-62 years) who performed lower limb DTI in Wuxi Second Hospital Affiliated to Nanjing Medical University were prospectively analyzed. Fractional anisotropy (FA), apparent diffusion coefficient (ADC) and λ 1, λ 2, λ 3 values of medial head of gastrocnemius (GM), lateral head of gastrocnemius (GL), tibialis anterior(TA) and soleus muscles(SOL) were measured respectively. The differences of DTI diffusion characteristics between 2 groups were compared by using independent-sample t test, and the correlation between FA, ADC and body mass index (BMI), fasting blood glucose (FBG), hemoglobin A 1c (HbA1c), high density lipoprotein (HDL), low density lipoprotein (LDL) and triglyceride (TG) were analyzed by Pearson correlation analysis. Results:The ADC of TA and SOL in T2DM group ((1.77±0.15) and (1.83±0.10)×10 -3 mm 2/s) was higher than that in control group ((1.66±0.11) and (1.75±0.16)×10 -3 mm 2/s); λ 1, λ 2, and λ 3 of TA in the T2DM group ((2.30±0.21), (1.63±0.17) and (1.38±0.13)×10 -3 mm 2/s) were higher than those in control group ((2.17±0.12), (1.51±0.13) and (1.31±0.12)×10 -3 mm 2/s); λ 2 and λ 3 of SOL were also higher than those in control group ((1.74±0.11) vs (1.64±0.18)×10 -3 mm 2/s and (1.53±0.12) vs (1.44±0.15)×10 -3 mm 2/s; t values: 2.65-3.91, all P<0.05). There were no significant correlations between FA, ADC and BMI, FBG, HbA1c, HDL, LDL and TG ( r values: from -0.15 to 0.08, all P>0.05). Conclusions:Quantitative parameters of DTI, especially ADC, can sensitively detect the microstructural changes of calf muscle in T2DM patients without peripheral ischemia. TA and SOL have high sensitivity to the diffusion of T2DM-related microstructural changes.

Objective The study aimed to construct and validate a predictive model for pulmonary nodules(PN)nature based on clinicopa-thological features,imaging,and serum biomarkers,so as to provide scientificdecision-making for early diagnosis and treatment of lung cancer.Methods A retrospective was performed on 816 PN patients with definited pathological diagnosis who received surgical resection analysisor lung biopsy in the Department of Thoracic Surgery and Oncology of Shenzhen Traditional Chinese Medicine Hospital from January 2019 to February 2023.Among them,113 cases that did not meet the inclusion criteria were excluded,and the remaining 703 cases were included in the study.The study based on the clinicopathologic features(age,gender,smoking history,smoking cessation history and family history of cancer),chest imaging(maximum diameter of nodule,location of lesion,clear border,Lobulation,spiculation,vascular convergence sign,vacuole,calcification,air bronchial sign,emphysema,nodule type and pleural indentation,nodule number)and serum carcinoembryonic antigen(CEA),cytokeratin 19 fragment(CYFRA21-1),squamous cell carcinoma antigen(SCCA)in patients with PN.These cases were randomly divided into a modeling group(n=552,237 benign,315 malignant)and a validation group(n=151,85 benign,66 malignant).First,univariate analysis was performed to screen for statistically significant predictors of nodules nature.Then,multivariate regression analysis was performed to screen for independent predictors of nodules nature.Finally,the prediction model of PN nature was constructed by logistic regression analysis.Subsequently,the validation group data were entered into the proposed model and Mayo clinic(Mayo)model,veterans affairs(VA)model,Brock University(Brock)model,Peking University(PKU)model and Guangzhou Medical University(GZMU)model,respectively.PN malignancy probability was calculated.The receiver operating characteristic(ROC)curves were plotted.The diagnostic efficiency of each model was compared according to the area under the curve(AUC).Results There were statistically significant variables including age,family history of cancer,maximum nodule diameter,nodule type,upper lobe of lung,calcification,vascular convergence sign,lobulation,clear border,spiculation,and serum CEA,SCCA,CYFRA21-1 using univariate analysis.Multiple regression analysis showed that age,CEA,clear border,CYFRA21-1,SCCA,upper lobe of lung,maximum nodule diameter,family history of cancer,spiculation and nodule type were independent predictors of PN nature.The prediction model equation constructed in this study is as follows:f(x)= ex/(1+ex),X=(-6.318 8+0.020 8×Age+0.527 4×CEA-0.928 4×clear border+0.294 6×Cyfra21-1+0.294×maximum nodule diameter+1.220 1×family history of cancer +0.573 2×upper lobe of lung +0.064 8×SCCA +1.461 5×Spiculation +1.497 6×nodule type).The AUC(0.799 vs 0.659,0.650)of the proposed model was significantly higher compared with Mayo model and VA model,and there were statistically significant differences(Z=3.029,2.638,P=0.003,0.008).However,compared with Brock model,PKU model and GZMU model,the differences of AUC(0.799 vs 0.762,0.773,0.769)were not statistically significant(Z=1.063,0.686,0.757,P=0.288,0.493,0.449).Conclusion The prediction model for PN nature established in this study is accurate and reliable,which can help clinics with early diagnosis and early intervention,and this prediction model deserves to be popularized.