Objective:To investigate the factors related to recurrent laryngeal nerve invasion in papillary thyroid carcinoma (PTC) with posterior capsular involvment.Methods:The data of 186 PTC patients admitted and operated from Jun 2017 to Jun 2022 were retrospectively analyzed. The invasion of recurrent laryngeal nerve was evaluated on its relation to gender, age, tumor size, Hashimoto's thyroiditis, lymph node metastasis in central region, BRAFV600E gene mutation especially PTC posterior capsular involvement.Results:The recurrent laryngeal nerve was invaded in 30 out of 186 patients. Univariate analysis showed that recurrent laryngeal nerve invasion was related to tumor size, Hashimoto's thyroiditis and cervical lymph node metastasis( χ2=6.964,4.814,6.078, P<0.05). Multivariate regression analysis showed that tumor size and lymph node metastasis in cervical region were independent risk factors for recurrent laryngeal nerve invasion(β=1.020,1.622, P<0.05). Hashimoto's thyroiditis was a protective factor for recurrent laryngeal nerve invasion (β=-1.881, P<0.05). Conclusions:When papillary thyroid carcinoma invaded the capsule, the risk of recurrent laryngeal nerve invasion was higher with larger tumor size and cervical lymph node metastasis, while Hashimoto's thyroiditis was a protective factor for the risk of recurrent nerve invasion.

The primary and secondary tuberculosis features two completely different pathogenesis.At present,the pathogenesis of primary tuberculosis has been clear,whereas that of secondary tuberculosis remains unclear.In order to decipher the mechanism of secondary infection of
Coinfection ; Cord Factors ; Humans ; Mycobacterium tuberculosis ; Tuberculosis ; Tuberculosis, Pulmonary

A new isoflavone derivative was isolated from Rosa damascena by using various chromatographic techniques including silica gel, Sephadex LH-20, and preparative RP-HPLC separation. Its structure was identified as 4'-hydroxy-7-(3-hydroxypropanoyl)-6-methoxy-isoflavone using combined examinations of their UV, IR, MS, and NMR spectroscopic data. Biological activity test showed that this compound showed prominent antibacterial activity with MIC₉₀ value of (46±4) mg·L⁻¹ for methicillin resistant Staphylococcus aureus(MRSA) strain. This value is close to that of levofloxacin [with MIC₉₀ value (53±5) mg·L⁻¹].
Anti-Bacterial Agents ; isolation & purification ; pharmacology ; Isoflavones ; isolation & purification ; pharmacology ; Methicillin-Resistant Staphylococcus aureus ; drug effects ; Microbial Sensitivity Tests ; Phytochemicals ; isolation & purification ; pharmacology ; Rosa ; chemistry

A set of universal loop-mediated isothermal amplification (LAMP) primers targeting the fla gene was designed to detect Borrelia burgdorferi sensu lato (B. burgdorferi s.l.) in human samples. The sensitivity of LAMP was 20 copies/reaction, and the assay did not detect false positives among 11 other related bacteria. A positive LAMP result was obtained for 9 of the 24 confirmed cases and for 12 of 94 suspected cases. The positive rate of LAMP was the same as that of nested PCR. The LAMP is a useful diagnostic method that can be developed for rapid detection of B. burgdorferi s.l. in human sera. Combination of the LAMP and nested PCR was more sensitive for detecting B. burgdorferi s.l. in human serum samples.
Borrelia burgdorferi Group ; genetics ; isolation & purification ; China ; DNA, Bacterial ; genetics ; isolation & purification ; Humans ; Lyme Disease ; diagnosis ; Nucleic Acid Amplification Techniques ; methods ; Polymerase Chain Reaction ; methods ; Sensitivity and Specificity

OBJECTIVEHuman Lyme Borreliosis (LB), which is caused by Borrelia burgdorferi sensu lato (B. burgdorferi), has been identified as a major arthropod-borne infectious disease in China. We aimed to develop a multiple locus variable-number tandem repeat (VNTR) analysis (MLVA) assay for the genotyping of Borrelia burgdorferi strains detected in China.

METHODSB. garinii PBi complete 904.246 kb chromosome and two plasmids (cp26 and lp54) were screened by using Tandem Repeats Finder program for getting potential VNTR loci, the potential VNTR loci were analyzed and identified with PCR and the VNTR loci data were analyzed and MLVA clustering tree were constrcted by using the categorical coefficient and the unweighted pair-group method with arithmetic means (UPGMA).

RESULTSWe identified 5 new VNTR loci through analyzing 47 potential VNTR loci. We used the MLVA protocol to analyse 101 B. burgdorferi strains detected in China and finally identified 51 unique genotypes in 4 major clusters including B. burgdorferi sensu stricto (B.b.s.s), B. garinii, B. afzelii, and B. valaisiana, consistent with the current MLSA phylogeny studies. The allele numbers of VNTR-1, VNTR-2, VNTR-3, VNTR-4, and VNTR-5 were 7, 3, 9, 7, and 6. The Hunter-Gaston index (HGI) of five VNTR loci were 0.79, 0.22, 0.77, 0.71, and 0.67, respectively. The combined HGI of five VNTR loci was 0.96. Clustering of the strains of Xinjiang, Inner Mongolia and Heilongjiang was confirmed, and this situation was consistent with the close geographical distribution of those provinces.

CONCLUSIONThe MLVA protocol esytablished in this study is easy and can show strains' phylogenetic relationships to distinguish the strains of Borrelia species. It is useful for further phylogenetic and epidemiological analyses of Borrelia strains.

Borrelia burgdorferi Group ; genetics ; China ; Genotyping Techniques ; Minisatellite Repeats

Objective Antiangiogenesis therapy has been shown to prolong survival for patients with malignant tumor .However the present study has not been observed the clinical benefit of antiangiogenesis therapy combination with chemotherapy treated with gastric canc-er.Human recombinant vascular endothelial inhibition (endostar) as a multi-targeted anti-angiogenesis drug, the mechanism is different from other Antiangiogenesis drugs.It can block different pathways of signal transduction to inhibit angiogenesis .This study aimed to observe the effect of combined application of endostar and paclitaxel on biological behavior of gastric cancer cell lines . Methods MMT assay and Tr-answell invasion assay were respectively used to examine the inhibition rate of cell growth and invasion ability when cells were treated with va-rious concentrations of endostar and paclitaxel alone or in combination.The protein expressions of VEGF,MMP-2 and MMP-9 were examined by Western blot. Results Endostar or paclitaxel effectively inhibited the growth of MGC803 cells and the in vitro invasion of MGC803 cells in a concentration-dependent manner.The proliferation and invasion ability of combined treatment with endostar and paclitaxel was significantly lower than that of endostar or paclitaxel alone (P<0.05).Compared with con-trol group, the VEGF,MMP-2 and MMP-9 protein expressions were de-creased in experimental groups ( P <0.05).Compared with paclitaxel group, the VEGF, MMP-2 and MMP-9 protein expressions were relatively reduced in combination groups (P<0.05). Conclusion Endostar combined with paclitaxel can suppress the growth and invasion of MGC803 cells, and the decreasing VEGF , MMP-2 and MMP-9 expressions may be involved in the mechanism .

This study was aimed to summarize and analyze the morphology, immunophenotype, cytogenetics, molecular biology (MICM), tyrosine kinase (TK) gene mutations and clinical features of acute myeloid leukemia (AML) with complex variant of t(8;21). A retrospective study was performed for 20 AML patients with complex variant of t(8;21) in our hospital from January 1994 to April 2012, including analysis of clinical feature, immunophenotype, chromosome karyotype, treatment regimen, as well as the overall survival (OS) and relapse-free survival (RFS). Mutations of C-KIT, FLT3-ITD, FLT3-TKD and JAK2V617F were detected by genomic DNA PCR and the sequencing was per-formed in 13 AML patients with complex variant of t(8;21). The results showed that (1) the incidence of 20 AML patients with complex variant of t(8; 21) was 2.4% of total t(8; 21) AML patients. In 20 AML patients with complex variant of t(8;21), 1 case was M1, 17 cases were M2, 2 cases were M4; 10 cases were myeloid phenotype and the other 3 were myeloid plus lymphoid phenotype. There were 16 kinds of cytogenetics additional involvement of chromosomal breakpoints: lp22, 1p32, 2q35, 2q14, 3p25, 5q13, 6p22, 7q21, llq11, 1lq13, 12q14, 12q24, 12p12, 14q32, 15p13, 20q12. (2) C-KIT aberrations were detected in 30.8% cases, all mutated in exon 17 (mutkit 17), only 1 case had JAK2V617F mutation. The result of FLT3 mutation screenings in AML patients with complex variant of t(8; 21) was negative. Of 5 patients with gene mutations, 1 patient (20%) achieved complete remission (CR), the median RFS and median OS time were 6.5 months and 8.9 months respectively. Of the 8 patients without gene mutations, 6 patietns (75%) achieved CR; the median RFS and median OS time were 26.6 months and 27.7 months respectively. It is concluded that the AML patients with complex variant of t(8;21) shows typical features of t(8;21) AML, but the existence of the tyrosine kinase-related gene mutation has important implications on remission rate and long-term survival of patients treated by induction chemotherapy.
Adolescent ; Adult ; Aged ; Chromosomes, Human, Pair 21 ; Chromosomes, Human, Pair 8 ; DNA Mutational Analysis ; Female ; Humans ; Leukemia, Myeloid, Acute ; genetics ; Male ; Middle Aged ; Protein-Tyrosine Kinases ; genetics ; Retrospective Studies ; Translocation, Genetic ; Young Adult

The aim of this study was to detect the expression level of eIF4E gene in patients with non-treated, remission and non-remission/relapse acute myeloid leukemia (AML), and other non-malignant haematologic diseases so as to analyze and reveal the relationship of eIF4E gene expression with AML progression. SYBR Green I RT-PCR was used to assay the expression level of eIF4E mRNA extracted from bone marrow mononuclear cells in 30 patients with AML (6 in M2, 5 in M3, 8 in M4, 10 in M5, 1 in M6) and 20 patients with non-malignant hematologic diseases. The β2-microglubin(β2M) was used as internal reference and the formula 2(-ΔCt)×100% was applied to calculate the expression level of eIF4E gene. The results showed that the eIF4E expression level (7.098 ± 5.544)% in patients with non-treated and non-remitted/relapsed AML was significantly higher than that in patients with remission (0.964 ± 0.312)% (P < 0.01) and non-malignant hematologic diseases (0.248 ± 0.163)% (P < 0.01). There was no difference between latter two group patients, even though the expression level of eIF4E gene in patients with M4 and M5 was higher. As compared with non-malignant hematologic diseases, the expression level of eIF4E gene of patients with remission patients showed no significant difference. It is concluded that the over-expression of eIF4E gene has been found in patients with AML, and its level obviously decreases along with remission of disease, thus the eIF4E gene may be a surveillance parameter for disease progression.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Disease Progression ; Eukaryotic Initiation Factor-4E ; genetics ; Female ; Gene Expression ; Humans ; Leukemia, Myeloid, Acute ; genetics ; pathology ; Male ; Middle Aged ; Real-Time Polymerase Chain Reaction ; Young Adult

OBJECTIVETo optimize the performance of Pulsed-Field Gel Electrophoresis (PFGE) for the comparison of inter-laboratory results and information exchange of Borrelia burgdorferi subtyping.

METHODSA panel of 34 strains of B. burgdorferi were used to optimize PFGE for subtyping. In order to optimize the electrophoretic parameters (EPs), all 34 strains of B. burgdorferi were analyzed using four EPs, yielding different Simpson diversity index (D) values and the epidemiological concordance was also evaluated.

RESULTSThe EP of a switch time of 1 s to 25 s for 13 h and 1 s to 10 s for 6 h produced the highest D value and was declared to be optimal for MluI and SmaI PFGE of B. burgdorferi. MluI and SmaI were selected as the first and second restriction enzymes for PFGE subtyping of B. burgdorferi according to discrimination and consistency with epidemiological data.

CONCLUSIONPFGE can be used as a valuable test for routine genospecies identification of B. burgdorferi.

Animals ; Bacterial Proteins ; metabolism ; Bacterial Typing Techniques ; Borrelia burgdorferi ; classification ; genetics ; isolation & purification ; DNA, Bacterial ; metabolism ; Deoxyribonucleases, Type II Site-Specific ; metabolism ; Electrophoresis, Gel, Pulsed-Field ; Humans ; Ixodes ; Rats

OBJECTIVETo study the technique of Western blot for the diagnosis of Lyme disease caused by Borrelia afzelii in China and to establish the standard criteria by operational procedure.

METHODSFP1, which is the representative strain of B. afzelii in China, was analyzed by SDS-PAGE, electro transfer and immunoblotting assays. The molecular weights of the protein bands of FP1 were analyzed by Gel-Pro analysis software. In a study using 451 serum samples (159 patients with Lyme disease and 292 controls), all observed bands were recorded. The accuracy of the WB as a diagnostic test was established by using the ROC curve and Youden index.

RESULTSCriteria for a positive diagnosis of Lyme disease were established as at least one band of P83/100, P58, P39, OspB, OspA, P30, P28, OspC, P17, and P14 in the IgG test and at least one band of P83/100, P58, P39, OspA, P30, P28, OspC, P17, and P41 in the IgM test. For IgG criteria, the sensitivity, specificity and Youden index were 69.8%, 98.3%, and 0.681, respectively; for IgM criteria, the sensitivity, specificity and Youden index were 47%, 94.2%, and 0.412, respectively.

CONCLUSIONEstablishment of WB criteria for B. afzelii is important in validating the diagnostic assays for Lyme disease in China.

Blotting, Western ; methods ; Borrelia burgdorferi Group ; pathogenicity ; China ; Electrophoresis, Polyacrylamide Gel ; Enzyme-Linked Immunosorbent Assay ; Humans ; Lyme Disease ; diagnosis ; microbiology