Diagnostic value of thyroid imaging report and data system combined with BRAF V600E mutation detection for thyroid fine needle puncture cytological uncertain nodules / 肿瘤研究与临床

Objective:To investigate the diagnostic value of thyroid imaging report and data system (TIRADS) combined with BRAF V600E mutation detection in differentiating uncertain thyroid nodules by using fine needle aspiration cytology (FNAC), and to analyze the role of TIRADS classification in screening the nodules needed to be routinely detected for BRAF V600E mutation.Methods:The clinicopathological data of 337 thyroid nodules patients diagnosed with TIRADS classification, FNAC Bethesda classification, BRAF V600E mutation detection and postoperative histopathology from the Second Hospital of Hebei Medical University between January 2018 and August 2021 were retrospectively analyzed. The role of TIRADS classification, FNAC Bethesda classification and BRAF V600E mutation detection alone and the combined detection in the differentiation of benign and malignant thyroid nodules was also analyzed.Results:The postoperative histopathological result was regarded as the gold standard. The sensitivity of TIRADS classification, FNAC Bethesda classification and BRAF V600E mutation for thyroid cancer diagnosis was 76.0%, 88.1% and 80.4% respectively, and the corresponding specificity was 84.0%, 96.0% and 100.0%, respectively. Histologically, 37 (62.7%) of 59 nodules with FNAC uncertainty were malignant nodules after the surgery. The sensitivity and accuracy of BRAF V600E mutation detection in the diagnosis of FNAC uncertain nodules were 51.4% and 69.5%, respectively, while the sensitivity and accuracy of BRAF V600E mutation detection combined with TIRADS classification were 86.5% and 84.7%, respectively. The sensitivity and accuracy of BRAF V600E mutation detection combined with TIRADS classification were both improved ( P values were 0.002 and 0.049, respectively). The positive rate of BRAF V600E mutation in thyroid nodules increased step by step with the rise of risk degree in TIRADS classification, and the type 3 cases were lower than those in type 4a cases [14.3% (1/7) vs. 68.6% (24/35), P = 0.012], and there were no statistically significant differences among the adjacent groups above 4a (all P > 0.05). Conclusions:TIRADS combined with BRAF V600E mutation detection can improve the sensitivity and accuracy in the diagnosis of FNAC uncertain thyroid nodules. The BRAF V600E mutation rate of TIRADS 4a and above nodules is high, so routine detection is recommended.

A highly active GH11 xylanase from Penicillium sp. L1 with potential applications in xylo-oligosaccharide production / 生物工程学报

Xylanase is a high-profile glycoside hydrolase with applications in brewing, feed, pharmacy and bioenergy industries, but most of xylanases are in active below 30 ℃. In order to obtain low temperature active xylanase, a xylanase gene, XYN11A, was cloned from Penicillium sp. L1 and expressed in Pichia pastoris GS115. After purification and enzyme assay, optimal pH and temperature were determined to be 3.5 to 4.0 and 55 ℃. This enzyme was stable at acid and neutral condition (pH 1.0 to 7.0) or under the treatment of 40 ℃ for 1 hour. This xylanase displayed strong resistance to all tested ions and chemicals. Noteworthily, XYN11A maintained a higher activity of 6 700 U/mg than a lot of GH11 xylanase, and demonstrated higher activity (24% to 58%) at lower temperature from 20 to 40 ℃. After beechwood xylan hydrolysis for 16 h, the hydrolysates consisted mainly of xylobiose, xylotriose and xylotetraose and barely of xylose, thus XYN11A could be used for the production of prebiotic xylooligosaccharide. Possessing the features of acidophilic, highly active at lower temperature and oligosaccharide production, XYN11A demonstrated great potential in food and feed industrials.

Expression and prognostic significance of SP1, KLF4 and p21 in ovarian serous carcinoma / 临床与实验病理学杂志

Purpose To explore the difference of expression and prognostic significance of SP1,KLF4 and p21 in low grade ovarian serous carcinoma (LGSC) and high grade ovarian serous carcinoma (HGSC).Methods The expression of SP1,KLF4 and p21 protein was examined with immunohistochemistry EliVision method in cases with LGSC and HGSC.Kaplan-Meier analysis and Cox multivariate survival analysis were used to assess the impact of SP1,KLF4 and p21 expression on prognosis of LGSC and HGSC.Results SP1,KLF4 and p21 expression were detected respectively in 74.5％,17.0％ and 11.7％ HG-SC cases,and in 65.2％,34.8％ and 26.1％ LGSC cases.Compared to control group,the expression level of SP1 was significantly higher (P ＜ 0.05),but the expression level of KLF4 and p21 were significantly lower (P ＜0.05).There was no significant difference of SP1,KLF4 and p21 expression between HGSC and LGSC (P ＞ 0.05).The expression of SP1,KLF4 and p21 were associated with FIGO stage,meanwhile SP1 associated with residual tumor size in HGSC (P ＜ 0.05).There was a significant negative correlation between SP1 and KLF4,p21 proteins in HGSC (P ＜ 0.05).Kaplan-Meier analysis revealed that there were significantly poor overall survival (OS) of 5 years for patients with HGSC displaying high expression of SP1,or low expression of KLF4 and p21 (P ＜0.05),but no significantly improved OS for patients with LGSC (P ＞ 0.05).Cox analysis showed that SP1 overexpression is an independent prognosis factor for HGSC.Conclusion Overexpression of SP1 and low expresion of KLF4 and p21 contribute to carcinogenesis of HGSC and LGSC.They are associated with a poor prognosis of HGSC,but not LGSC,meanwhile SP1 is an independant prognosis factor for HGSC.

Pharmacokinetics of aristolochic acid A in Radix Aristolochiae and Guanxinsuhe Capsule / 中草药

Objective To study the pharmacokinetics of aristolochic acid A in Radix Aristolochiae and the compound preparation of Guanxinsuhe Capsule in mice in vivo after single-dose oral administration and observe the difference of aristolochic acid A absorption and distribution. Methods Aristolochic acid A assay was performed by RP-HPLC on a Waters apparatus with a DiamonsilTM C18 column (250 mm × 4.6mm, 5 μm), a mobil phase: a mixture of methanol-water-acetic acid (72: 27 : 1), flow rate: 1.0 mL/min, detection wavelength: 315 nm, and column temperature: 20 ℃. Results Mice were given Radix Aristolochiae and Guanxinsuhe Capsule by ig at the same level of 2. 5 mg/kg of aristolochic acid A, respectively, which were suspended in 0. 3% CMC-Na solution. Plasma concentrations were determined by RPHPLC. After single-dose ig administration of Radix Aristolochiae or Guanxinsuhe Capsule to mice, the mean plasma concentration-time courses of aristolochic acid A obtained fitted the one-compartment model.The main pharmacokinetic parameters of aristolochic acid A in Radix Aristolochiae, t1/2ka, t1/2 ke, tmax,AUC, Cmax are 5. 103 min, 43. 63 min, 17.89 min, 80. 45 (μg · min)/mL, and 0. 916 8 μg/mL; the rela tive pharmacokinetic parameters in Guanxinsuhe Capsule are 5. 294 min, 43.50 min, 18. 32 min, 33.08(μg · min)/mL, and 0. 381 8 μg/mL. Conclusion The Cmax of aristolochic acid A in Guanxinsuhe Capsule is significantly less than that in Radix Aristolochiae, which indicates that the compound compability could decrease the absorption of aristolochiae acid A.

Cryoprecipitate applied to postoperative wounds of patients with anal and rectal diseases / 中国输血杂志

Objectve To find out an effective method for treatment of postoperative wounds of the patients with anal and rectal diseases.Methods Cryoprecipitate was smeared over postoperative wounds of the patients with anal and bowel diseases(the experimental group),and the mean healing time,infection rates and hemostatic effect were observed and compared to the patients who were treated by routine medicine(the control group).Results The mean healing time of patients with hemorrhoid,anal fistula and perianal abscess was shorter than the control group by 5.68 days,6.01 days and 1.87 days respectively.And the infection rates of the experimental and control group were 9.18%(9/98)and 44.68%(42/94)respectively,significant difference between them was found( P

Simultaneous determination of chlorogenic acid,puerarin and paeoniflorin in Kangganning Mixture by multiple wavelength RP-HPLC / 中成药

AIM: To establish a method for simultaneously determining chlorogenic acid,puerarin and paeoniflorin in Kangganning Mixture(Flos Lonicerae japonicae,Radix Puerariae Lobatae,Radix Paeoniale rubra,Fructus Forsythiae,etc.). METHODS: A multiple wavelength HPLC method was devoloped.The analysis was performed on an Agilent Zorbax SB C_(18) column(250 mm?4.6 mm,5 ?m) with acetonitrile-0.1%H_3PO_4(11∶89) as the mobile phase.The detection wavelengthes were monitored at 324 nm,254 nm and 230 nm for chlorogenic acid,puerarin and paeoniflorin,respectively.The flow rate was 1.0 mL/min and the column temperature was at 30 ℃.(RESULTS:) The calibration curves of chlorogenic acid,puerarin and paeoniflorin showed good linearity at the ranges of 0.179-2.864 ?g,0.071 55-1.144 8 ?g and 0.372 5-5.96 ?g,respectively.The average recoveries were(100.7%,) 103.3%,102.6% with RSD of 2.2%,2.4%,1.9%,respectively. CONCLUSION: The method is simple,accurate and reproducible for determining chlorogenic acid,puerarin and paeoniflorin in Kangganning Mixture.