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Objective@#To observe the expression of integrin-linked kinase on pulmonary fibrosis of paraquat (PQ) poisoning rats, and to discuss the relationship between ILK with pulmonary fibrosis induced by paraquat.@*Methods@#Forty male Sprague-Dawley (SD) rats were randomly divided into control group and paraquat group, 20 in each group; the PQ group rats were intraperitoneally injected PQ liquid (18 mg/kg) , and the control group rats were injected the same volume of saline; 5 rats of these two groups were respectively sacrificed after 7, 14, 28, 56 days of PQ injection; according to the results of lung biopsy HE staining and Masson staining to observe the lung pathologic changes, measure the value of lung hydroxyproline and the expression of ILK.@*Results@#HE and Masson staining of lung pathological biopsy showed, the 7th day after PQ exposure lung tissue mostly had congestion, edema, inflammatory cells infiltration; the 14th inflammation reduced, fibrosis change appeared gradually; the 28th and 56th showed the lung tissue structure disorder and occurred apparent hydroproline with blue dye in pulmonary interstitium. Compared with control group in the same experiment period, the value of lung hydroxyproline in each experiment period of PQ group increased (P<0.05) , and the value of lung hydroxyproline of PQ group rose with the increasing of the time of PQ poisoning. The expression of ILK mRNA and protein in each experiment period of PQ group was higher than the control group in the same experiment period (P<0.05) ; ILK mRNA and protein of PQ group began to increase on 7 day phase, reached the highest on 28 day phase, and decreased on 56 day phase.@*Conclusion@#The expression of ILK mRNA and protein increased with the lung fibrosis progression of PQ poisoning rats, so ILK could be the key molecule target which induced pulmonary fibrosis of PQ poisoning.
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Objective To investigate the value of immunophenotypes in pathologic diagnosis of follicular lymphoma (FL) and the differential diagnosis between neoplastic follicle (NF) and reactive hyperplastic follicle (RHF).Methods 50 cases of FL and 10 cases of RHF as control were studied by clinical data, the expressions of CD20, bcl-2, CD3, CD10, bcl-6, CD21 and Ki-67 were detected by EnVision immunohistochemical method for the immunphenotypical pattern of FL and RHF.Results Among 50 FL cases , there were 24 male cases and 26 female cases, with median age of 50 years old (10-80 years old), including 32 cases (64 ％) involved predominantly neck lymph nodes.The histologic grades were 1-2 in 16 cases (32 ％) and ≥3 in 34 cases (68 ％).CD20, CD10 and bcl-6 were positive in NF tissues of FL, with irregular forms of NF and loss of the mantle area without clear demarcation, and infiltrating to NF, irregular shape and no clear perimeter.The bcl-2 was positive in all of grade 1-2 NF, and it was positive in 68 ％ (23/34) cases and was partial or total negative in 32 ％ (11/34) cases in grade≥3 NF.Those were poorly demarcated contours.The Ki-67 proliferative index of NF were ＜30 ％ in grade 1-2, and ＞30 ％ in grade ≥ 3, with the highest to 90 ％.In FL, the CD21 staining result showed follicular dendritic cells (FDC) network were synchronized with NF, and in some cases of grade ≥ 3, the FDC network were ruptured.In RHF, the CD20 was positive for round or oval nodules with clear demarcation.The CD10, bcl-6 and CD21 were positive and bcl-2 was negative in all germinal center without invasive immunophenotype.The Ki-67 index was high in germinal center, and sometimes polarity may be seen.Conclusion The immunophenotypical differences between FL and RHF include invasive characteristics, loss of follicular mantle area and germinal center pattern in the NF, while the normal follicular immunophenotype in the RHF.
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<p><b>OBJECTIVE</b>To establish a rat model of 1,2-dichloroethane (DCE)-induced subacute toxic encephalopathy.</p><p><b>METHODS</b>Sixty Sprague-Dawley rats were randomly divided into five groups: negative control, positive control, low-dose DCE (1 472 mg/m(3)), middle-dose DCE (2 550 mg/m(3)), and high-dose DCE (4 418 mg/m(3)). The three DCE groups received static inhalation of DCE 6 hours a day for 6 consecutive days. The positive control group received intraperitoneal injection of lipopolysaccharide (5 mg/kg) and were sacrificed 8 hours after injection. Blood and brain tissue were collected, followed by determination of brain water content and HE staining for pathological examination of brain tissue.</p><p><b>RESULTS</b>The rats in DCE groups suffered decreased body weight with increasing DCE dose (P < 0.01), and brain water content rose with increasing DCEdose. The brain water content of middle-dose DCE group (80.09 ± 0.14%) and high-dose DCE group (80.28±0.10%) increased significantly as compared with that of the negative control group (79.46±0.23%) (P < 0.001). Optical microscopy discovered loose structure and vasodilation in the brain tissue of middle-dose DCE group, indicating obvious brain edema; the high-dose DCE group and positive control group had spongiform and vacuolated brain tissues with severe vascular dilation, indicating severe brain edema.</p><p><b>CONCLUSION</b>A rat model of subacute toxic encephalopathy induced by 1, 2-dichloroethane has been successfully established.</p>