Common problems and solutions in hospital point-of-care testing quality management / 中华检验医学杂志

The rapid development of point-of-care testing (POCT) in clinical laboratories has brought challenges to the unified management in the hospital. There are many problems, such as how to ensure the ability and qualification of POCT operators, how to improve the quality management awareness of human, machines, materials, methods and environment in the process of POCT in clinical laboratories, how to help the clinical laboratories in the hospital to carry out POCT comparison, and how to strengthen the information construction of POCT in the hospital. Thus, this article reviews the practice and experience of POCT management in our hospital on POCT quality assurance and the problems existing in POCT in clinical departments, proposes suggestions and solutions to strengthen the unified management of POCT in clinical laboratories and establish POCT quality management documents and to improve quality awareness. We hope to provide references for hospital administrators, medical departments, nursing departments, quality control departments and other functional departments on the quality management of POCT in the hospital, and find helpful answers to the puzzles of clinical laboratory in POCT, so as to make joint efforts to standardize the quality management of POCT in the hospital to ensure the accuracy of testing results.

Radiosensitivity of AsPC-1 cell to γ-rays enhanced by up-regulation of PUMA induced by targeted Slug gene / 中华放射医学与防护杂志

Objective To explore the influence of PUMA on radiosensitivity of pancreatic cancer AsPC-1 cells after Slug gene inhibition by transfected short interferencing RNA(siRNA). Methods The AsPC-1 cells were infected with MOI 10,50,100 for 72 h, respectively. The expression of Slug and PUMA was analyzed by Western blotting and immunohistochemistry methods. The transfected and control cells were exposed to 4 Gy γ-rays. The cells inhibition rate was examined by MTT, Hoechst 33342 and IP double staining. DNA ladder and Giemsa staning was used to observe apoptosis. Results The relative value of Slug expression was 0.831 ±0.14,0. 546 ±0.12 and 0.178 ±0.08 after AsPC-1 was infected with Slug-siRNA ( MOI 10,50,100) for 72 h, significantly lower than that of control group ( F = 4. 992,P ＜ 0.05 ).The relative value of PUMA was 0. 325 ±0. 07,0. 593 ±0. 11 and 0. 978 ±0. 12, after AsPC-1 was infected with Slug-siRNA ( MOI 10,50,100) for 72 h, significantly higher than that of control group ( F = 4. 324,P ＜ 0. 05 ). The cell proliferation rate was ( 78.76 ± 9. 36 ) % in transfection combined with radiosensitivity group, significantly higher than that of transfection group [ ( 43.68 ± 6.71 ) % ] and radiosensitivity group alone [( 19.25 ± 3.72)% ] (F = 5.056, P ＜ 0.05). The apoptosis of transfection combined with radiosensitivity group was significantly higher than that of others. Conclusions Slug gene targeting siRNA could inhibit the expression of Slug, and consequently increase the activation of PUMA expression, and so enhance the radiosensitivity to γ-rays.

The expression of ICAM-1 and P-selectin in the healing process of incised wounds of rats / 中国法医学杂志

Objective Explore the expression of intercellular adhesion molecule-1(ICAM-1) and Pselectin in the healing process for possible application in timing of incised wounds. Method An immunohistochemical study on the expression of ICAM-1 and P-selectin was performed on rats vital skin incised wounds (5min～7d)using postmortem incisions(5～30min)as control.Results In the vital skin incisions,positive stain of ICAM-1 was observed on epidermis began from 1h and lasted till 3d, while the P-selectin stain was observed on vascular endothelium as early as 10min after incision and lasted 5h; in addition, the expression of ICAM-1 was also found in the inflammatory cells and fibroblasts,the lasting period varied from group to group (groupⅠ 5min～1h,groupⅡ 3～7h,group Ⅲ 9～12h,groupⅣ 1d,groupⅤ 3d,groupⅥ 5～7d.).The positive ratios of ICAM-1 among the cells were very low in group Ⅰ(0.41?0.73%),and increased considerably in group Ⅱ(9.79?3.74%) and group Ⅲ(23.33?1.10%),maximized in group Ⅳ(30.58?2.65%),then decreased in group Ⅴ and Ⅵ.There were no changes of ICAM-1 and P-selectin in the postmortem incision group. Conclusion ICAM-1 and P-selectin are considered potentially useful markers for wound age determination in forensic practice.