RÉSUMÉ
Objective To investigate whether there is amyloid fibers in the mature neutrophils and to reveal the molecular mechanism of the formation of AD amyloidosis. Method Thirty cases of AD patients and 30 healthy control were enrolled. The white blood cell, the red blood cell,hemoglobin and neutrophil absolute value were determined by Sysmex X5-500i hematology analyzer. The neutrophils and amyloid variable specific probe affinity were measured, The starch like variable fluorescence intensity in plasma was dtected by the sulfur T (Thioflavin T, ThT) method. Results The affinity test results showed that the amyloidosis fluorescent probe (ThT) can be combined with tissue amyloid fibers specifically. The neutrophil amyloid fibers staining also showed a positive reaction. Compared with the AD group, no significant differences were found in white blood cell, red blood cell, hemoglobin and neutrophil absolute value level in the healthy control group The serum amyloid variable fluorescence intensity in the AD group was significantly higher than that in the control group (P < 0.05). Conclusion The amyloid fibers was found in the mature neutrophils, and the level of plasma amyloid fibers was significantly increased in the AD patients.
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Objective To investigate the pathogenesis in patients with uterine leiomyoma complicated by amyloidosis. Methods A total of 36 uterine leiomyoma patients were recruited in this study, and divided into two group by Congo red staining:amyloidosis group (n=6) and non-amyloidosis group (n=30). (1) Amyloidosis deposition was observed in amyloidosis group. (2) HE staining was used to compare changes of inflammatory cells in two groups. (3)PAS staining was used to observe polysaccharide difference in two groups. (4)Values of serum hemoglobin (HGB), white blood cell count (WBC), lymphocyte absolute value (LYM), neutrophil absolute value (NEU), total protein (TP), albumin (Alb) and prealbumin (PA) were com?pared between two groups. Results (1)Leiomyoma entity cells were negatively Congo red stained, while 5 out of 6 pseudo-capsule fiber deposition and 2 out of 6 blood vessel were positively Congo red stained. (2)Infiltrations of inflammatory cells were observed in two groups. (3) The PAS positive staining was found in amyloidosis deposition and non-amyloidosis deposi?tion groups. (4)There were no significant differences in HGB, WBC, NEU, LYM, TP, Alb and PA levels between two groups (P>0.05). Conclusion Metabolism changes resulted from cell function alterations in local micro-environment by uterine leiomyoma may be related to the formation of the amyloidosis.
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Objective:A method that is based on microfluidic cell chip technology was developed for the first time to analyze CD14+monocyte myeloperoxidase (MPO) expression in myelomonocytic leukemia (M4) patients. CD14+monocyte MPO expression in M4 patients was preliminarily discussed. Methods:a. The chip was prepared by using polydimethylsiloxane as the host material and by secondary foam molding. b. A total of 48 clinically diagnosed M4 patients and 52 patients with normal myelogram were included as the test and control groups, respectively. c. A method based on the microfluidic cell chip approach was established to detect CD14+mono-cytes and to determine the positive rate and degree of MPO expression in the cells. d. The microfluidic cell chip technique was used to compare CD14+monocyte MPO expression in M4 patients with that in the control. Results:a. The designed microfluidic single cell analysis chip allowed the entry of granulocytes into the corresponding microfluidic channels. Thus, blood cells were separated. Numer-ous ghost corpuscles surrounded the separated white blood cells (WBCs). WBC morphology did not show obvious changes. b. The posi-tive rate of MPO expression and the activity of CD14+monocytes in the bone marrow of M4 patients were significantly higher than those in the bone marrow of the control (P<0.05). Conclusion:A method based on microfluidic single cell technology was developed for the first time to analyze the MPO expression in CD14+monocytes. CD14+monocyte MPO activity in M4 patients was significantly higher than in the control. CD14+monocyte MPO activity can be used as an auxiliary examination marker for clinical diagnosis.
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ObjectiveTo investigate the role of SAA in rheumatoid arthritis(RA) pathogenesis by analyzing the expression of serum amyloid protein A(SAA) in serum,synovial fluid and synovial membrane in patients with RA.MethodsSAA levels in the serum and synovial fluid in each group were detected.Sera SAA was tested by Western blotting,while the expression of SAA in RA and osteoarthritis(OA) synovium was detected by immunohistochemistry.Comparisons between groups were performed by t-tests or KruskaWallis test.ResultsThe serum levels of SAA were significantly higher in RA [(318±132) μg/L] than those in OA [(127±47) μg/L] and healey controls [(127±41) μg/L,P＜0.01].In RA,the SAA levels in the synovial fluid [ (571±473) μg/L ] were significantly higher when compared to those in O A [ (129±33) μg/L](t=2.46,P=0.04).Western blotting results showed that SAA bands were found in the serum samples of each group,and higher expression of SAA were seen in RA.Pathology study had showed that SAA was observed mainly in endothelial cells,synovial fibroblasts,macrophages and perivascular areas in RA synovium.In OA,SAA was observed in perivascular areas and synovial fibroblasts.ConclusionIn RA,SAA levels in both serum and synovial fluid are significantly higher than those in the controls.High expression of SAA in RA synovium can be observed.Our results suggest that SAA may play a role in inflammation reaction and joint destruction of RA.