ABSTRACT
Objective:To investigate the difference in the radiation sensitivity of hematopoietic stem and progenitor cells (HSPCs) derived from fetal liver and bone marrow.Methods:HSPCs from fetal liver of 14.5 d embryo or bone marrow of 8 week-old mice were isolated to receive a single dose of 5 or 10 Gy irradiation in vitro using a 60Co irradiator. Twelve hours later, the cell apoptosis, mitochondrial reactive oxygen species (ROS) level, colony formation ability and DNA damage in HSPCs were detected. Freshly isolated HSPCs were injected into lethally irradiated CD45.1 + C57BL/6J mice (4.5 Gy+ 5 Gy with an interval of 30 min) Chimerism rate, lineage constitution, and cell cycle were analyzed 12 weeks after transplantation. Results:Compared with bone marrow HSPCs after irradiation, the percentage of apoptosis in fetal liver HSPCs was significantly higher ( t=16.21, 12.27, P<0.05), the level of ROS was dramatically elevated ( t=68.72, 18.89, P<0.05). At 10 Gy, fetal liver HSPCs could not form colonies at all ( t=12.41, 15.67, 9.46, P<0.05). γ-H2AX immunofluorescence staining showed that the DNA damage of fetal liver HSPCs was more severe after irradiation, and the number of Foci formed was significantly higher than that of bone marrow HSPCs ( t=2.27, 2.03, P< 0.05), which indicated that fetal liver HSPCs were more sensitive to radiation. The chimerism rate of transplanted fetal liver HSPCs was lower than that of bone marrow cells ( t=5.84, P<0.05) with a higher proportion of myeloid lineage, suggesting that fetal liver HSPCs had lower in vivo reconstitution capacity than bone marrow HSPCs and were more prone to myeloid differentiation. The cell cycle of bone marrow HSPCs from transplanted chimeric mice was examined, and the proportion of S-phase was significantly higher in the fetal liver group than that in the bone marrow group ( t=2.89, P<0.05). Mitochondrial stress results showed that fetal liver HSPCs had higher basal respiratory capacity ( t=39.19, P<0.05), proton leakage ( t=6.64, P<0.05), ATP production ( t=9.33, P<0.05), and coupling efficiency ( t=7.10, P<0.05) than bone marrow c-Kit + cells, while respiratory reserve capacity ( t=5.53, P< 0.05) was lower than that of bone marrow c-Kit + cells. Conclusions:HSPCs derived from fetal liver display higher radiosensitivty compared with bone marrow HSPCs, laying the foundation for an in-depth illustration of the effects of radiation on hematopoietic stem cells at different developmental stages.
ABSTRACT
Objective:To investigate the effect and underlying mechanism of BRCC3 knockout on acute GVHD(aGVHD) of mice.Methods:A total of 12 recipient C57BL/6J mice were divided into two groups, including 6 wild type(WT) and BRCC3 -/-(KO). The recipients were exposed to 4.5 Gy + 4.5 Gy 60Co γ-rays in total body irradiation (TBI) at 30 min intervals. At 6 h post-irradiation, 1×10 7bone marrow cells and 8×10 6 splenocytes from BALB/c mice were infused into C57BL/6J mouse via tail vein to develop aGVHD mouse model. BRCC3 was specifically knocked out in aGVHD mouse model. The organ damage was examined through histopathology. The levels of serum cytokines were measured by enzyme-linked immuno sorbent assay (ELISA) and cytometric bead array (CBA), respectively. Spleen, liver and small intestine lymphocytes were isolated at 9 d post-transplantation, and the infiltration and activation of T cells in the target organs were assayed using flow cytometry. Results:The absence of BRCC3 in recipient mice significantly shortened survival ( P<0.05) with increased liver injury of aGVHD mice. In BRCC3 -/-recipient mice, the proportions of CD8+ T cells and CD8+ CD25+ T cells were significantly higher than those in the spleen( t=6.53, 5.52, P<0.05), and the proportions of CD8+ T cells and CD8+ CD25+ T cells were significantly increased in the liver ( t=3.74, 3.19, P<0.05). Similarly, the proportions of CD8+ T cells, CD8+ CD25+ T cells and CD8+ CD69+ T cells were significantly elevated in the small intestine ( t=3.52, 4.06, 3.29, P<0.05). Conclusions:BRCC3 deletion increased the proliferation and activation of donor CD8+ T cells and aggravated aGVHD, which might provide a new prevention and treatment target for aGVHD.
ABSTRACT
Objective:To explore the expression level of interleukin-1 receptor-associated kinase-1 (IRAK1) in the peripheral blood of rheumatoid arthritis (RA) patients and analyze its relevance between disease activity and CD4 + T cell subsets. Methods:① The concentration of IRAK1 in the peripheral blood of 77 RA patients and 24 healthy controls were detected by enzyme linked immunosorbent assay (ELISA). ② The demo-graphic and clinical data of the RA group including disease activity score with 28 joints (DAS28), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), CD4 + T cell subsets in peripheral blood. ③Independent sample t test or Mann-Whitney U test were used to compare the differences between the two groups. Spearman rank correlation test and multiple linear regression were used to analyze the correlation between IRAK1 expression level and clinical data. Results:① The IRAK1 level of the peripheral blood of RA patients was significantly higher than in the normal controls ( P<0.001). ② Compared to normal controls, the peripheral blood of the RA group, the absolute numbers and proportion of regulatory T (Treg) cells were decreased ( P<0.001), the absolute numbers and proportion of helper T (Th) 17 and the ratio of Th17/Treg were increased. Moreover, the ratio of Th17/Treg was also increased. ③ With the increase of disease activity in RA patients, the expression of IRAK1 also increased. The expression of IRAK1 in the peripheral blood of RA group was positively correlated with ESR, number of joints involved and DAS28, and had statistically significant difference between the two groups ( r=0.23, P<0.05; r=0.24, P<0.05; r=0.27, P<0.05). Meanwhile, it was sign-ificantly negatively correlated with the percentage of Treg ( r=-0.27, P<0.05), and was significantly positively correlated with the ratio of Th17/Treg ( r=0.23, P<0.05) . However, there was no significant correlation with the ratio of Th1/Th2( P>0.05). Furthermore, multiple stepwise regression analysis showed that the expression of IRAK1 in the peripheral blood of RA group was positively correlated with ESR and the number of joints involved ( β=0.34, P=0.019; β=0.27, P=0.004), and it was inversely correlated with percentage of Treg ( β=-0.23, P=0.047, R2=0.219). Conclusion:IRAK1 expression in the peripheral blood of RA patients is up-regulated and correlated with disease activity. The decrease of Treg and the imbalance of Th17/Treg caused by high expression of IRAK1 may be one of the main factors for the occurrence and development of RA. Interfering the expression of IRAK1 may be a potential new target for RA treatment.
ABSTRACT
Objective:To examine the burden of caregivers for elderly Parkinson's patients(PD)and to analyze the mediating effects of social support on primary PD caregivers' burden and their quality of life.Methods:In this cross-sectional study, 281 primary caregivers for elderly Parkinson's patients who visited the Department of Neurology's outpatient clinics of Qilu Hospital of Shandong University from January to May 2021 were surveyed via a convenience sampling method, with 242 valid questionnaires(86.1%). The Chinese versions of the Caregiver Burden Questionnaire, Social Support Rating Scale and 36-Item Short Form Health Survey were used for the investigation.Pearson correlation analysis was used to establish a structural equation model for the influence of social support in the burden and quality of life of caregivers for PD patients.The mediating effects were tested using Process v2.16.3 and re-tested using AMOS.The mediating effects were validated with Bootstrap.Results:Primary caregivers' scores on burden, social support and quality of life were(26.9±23.1), (40.5±8.7)and(593.7±163.3), respectively.Caregiver burden was negatively correlated with social support(r=-0.482, P<0.01), and social support was positively correlated with quality of life(r=0.513, P<0.01). Caregiver burden was negatively correlated with quality of life( r=-0.654, P<0.01), The validated mediating effects showed caregiver burden's direct effects on quality of life(95% CI: -0.38-0.61)and mediating effects of social support(95% CI: -0.08-0.21), not including 0, indicating that the care burden of primary caregivers for elderly PD patients was not only able to predict their quality of life, but also predict their quality of life through the mediating effects of social support(direct effect: -0.50 and mediating effect: -0.14, accounting for 78.0% and 22.0%, respectively, of the total effect of -0.64). Conclusions:Care burden and social support are important factors affecting the quality of life of primary caregivers for elderly PD patients.Reducing care burden can not only directly affect the quality of life, but also indirectly affect the quality of life by increasing social support.
ABSTRACT
Objective:To study the effect of different doses of 60Co γ-ray ionizing radiation on mitochondrial function in mouse hematopoietic stem and progenitor cells (HSPCs). Methods:C57BL/6 mice were divided into control group, 1 Gy irradiation group and 4.5 Gy irradiation group. The mitochondrial functions were detected at 12 h and 24 h after irradiation, including ROS level, membrane potential, mitochondrial structure, and mitochondrial stress. Bone marrow c-Kit + cells received a single 15 Gy irradiation in vitro, after 24 h, mitochondrial function was detected. Results:It was found that mice leukocytes ( t=12.41, 18.31, 16.48, 14.16, 19.08, 20.25, P<0.05), red blood cells ( t=4.81, 6.62, P<0.05) and platelets ( t=4.33, 6.68, P<0.05) were significantly reduced. The numbers of bone marrow colony formation unit ( t=16.27, 55.66, 17.06, 43.75, P<0.05), and HSPCs ( t=5.16, 11.55, P<0.05) were decreased dose-dependently post-irradiation. Under 1 Gy irradiation, the mitochondrial function and mitochondrial basal metabolic index of HSPCs ( t= 7.36, 3.68, 4.58, 3.15, 3.15, P<0.05) were enhanced at 24 h post-irradiation. Under 4.5 Gy irradiation, mitochondrial number, mitochondrial membrane potential ( t=12.29, 10.46, P<0.05), maximal respiration and spare respiratory capacity were decreased ( t=7.81, 5.78, 6.70, 5.83, P<0.05), ROS level was increased ( t=4.63, 4.12, P<0.05). The basal respiration and oxidative phosphorylated ATP production were reduced at 12 h after irradiation ( t=8.48, 3.80, P<0.05); and the proton leakage was increased ( t=6.57, P<0.05) and coupling efficiency was reduced ( t=11.43, P<0.05) at 24 h after irradiation. In cultured c-Kit + cells, the level of ROS ( t=11.30, P<0.05) and the maximum respiration and spare respiratory capacity were increased ( t=4.25, 3.44, P<0.05) while the mitochondrial membrane potential was decreased ( t=34.92, P<0.05) significantly. Conclusions:A method for systematically assessing mitochondrial function in HSPCs was established, and the effect of ionizing radiation on mitochondrial function of HSPCs was clarified, laying a foundation for further revealing the mechanism of ionizing radiation-induced mitochondrial damage in HSPCs.
ABSTRACT
Objective:To explore the expression of peptidyl prolyl cis-trans isomerase (Pin1) activity in peripheral blood of patients with rheumatoid arthritis (RA) and the value and correlation of T helper cell 17/regulatory cells (Th17/Treg) cells, and to analyze the effect and influence of all-transretinoic acid (ATRA) on it.Methods:① Comparing the difference of Pin1 expression and absolute counts of Th17 and Treg between RA patients before and after treatment and healthy control group, Kruskal-Wallis rank sum test was used for analysis. ② To analyze the correlation between the expression of Pin1 and its general data, activity indicators [such as erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and disease activity score 28 joints (DAS28) scores], Th17, Treg and some cytokines in RA patients, and to use Pearson and Spearman correlation tests. ③ To analyze the difference of Pin1 expression and Th17/Treg in peripheral blood of RA patients treated with low-dose all-trans retinoic acid (10 mg twice a week) and traditional immunosuppressants such as hydroxychloroquine for 3 months respectively. Mann-Whitney U test was used for comparison between the two groups, and the difference was statistically significant with ( P<0.05). Results:① The activity of Pin1 in peripheral blood of the newly treated group of RA was [13.62(9.16, 19.42)] higher than that of the healthy control group [8.97(7.62, 11.45)]( Z=42.82 , P<0.05), and Th17 was [18.28(12.76, 24.08)] higher than that of the healthy control group [6.04(4.96, 4.96)]( Z=48.83 , P<0.05). Treg [11.06(5.31, 21.87). It was lower than that of healthy control group [40.41(24.33, 48.52)]( Z=42.21 , P<0.05). ② the activity of Pin1 in peripheral blood of RA patients was positively correlated with CRP, the number of involved joints, DAS28 score, interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) ( r=0.396, P<0.05; r=0.683, P<0.05; r=0.466, P<0.05; r=0.315, P<0.05; r=0.416, P<0.05). ③ Compared with the newly treated RA group, the activity of Pin1 [6.94(5.96, 8.77), Z=42.82 , P<0.05] and Th17 7.38 decreased [7.38(3.85, 11.21), Z=48.83 , P<0.05], while Treg [40.41 (17.77, 33.47)] increased ( Z=42.21 , P<0.05). ④ Compared with the traditional medicine group, Treg [28.9(21.73, 37.36)] was higher in the retinoic acid group, and the difference was statistically significant ( Z=-2.683 , P<0.05). The activity of Pin1 was [6.23(5.58, 8.75)], but there was no statistical significance ( Z=-1.622 , P=0.104). Conclusion:Pin1 in peripheral blood of RA patients is over-expressed. Th17 is increased and Treg is decreased. ATRA combined with other traditional drugs can reduce Pin1 activity, promote Treg growth and improve disease activity of RApatients to a certain extent.
ABSTRACT
Objective@#To summarize the nursing experience of postoperative infection of hip joint replacement combined with gaucher′s disease.@*Methods@#According to the characteristics of the disease, nursing intervention and symptomatic treatment were given, including infection control, nursing of complications, nursing of joint puncture, medical treatment and nursing, and strengthening psychological nursing and safety nursing.@*Results@#Through targeted nursing, the patient′s infection was controlled, the condition was stable, the symptoms were relieved, and the patient was discharged.@*Conclusions@#In view of the patient′s condition, the development and implementation of comprehensive and integrated targeted nursing measures can effectively reduce the complications, alleviate the progress of the disease, improve the understanding of gaucher′s disease and the quality and effect of the disease nursing.
ABSTRACT
Objective To summarize the nursing experience of postoperative infection of hip joint replacement combined with gaucher′s disease. Methods According to the characteristics of the disease, nursing intervention and symptomatic treatment were given, including infection control, nursing of complications, nursing of joint puncture, medical treatment and nursing, and strengthening psychological nursing and safety nursing. Results Through targeted nursing, the patient′s infection was controlled, the condition was stable, the symptoms were relieved, and the patient was discharged. Conclusions In view of the patient′s condition, the development and implementation of comprehensive and integrated targeted nursing measures can effectively reduce the complications, alleviate the progress of the disease, improve the understanding of gaucher′s disease and the quality and effect of the disease nursing.
ABSTRACT
Objective To explore the correlation between depressive symptoms and frailty,in order to provide evidence for prevention and relief of depressive symptoms in elderly inpatients.Methods A cross-sectional survey and comprehensive geriatric assessment(CGA)were conducted with 248 eligible elderly inpatients from December 2015 to February 2017 in our hospital.Depressive symptoms were assessed by the 5-Item Geriatric Depression Scale(GDS-5),and frailty was identified by the frailty phenotype method.Results In all respondents,50 (20.2 ％)patients showed depressive symptoms,93(37.5 ％)patients had pre-frailty and 39 (15.7 ％)patients had frailty.Correlation analysis showed that frailty degree,low grip strength,slow gait speed,low physical activity,fatigue,and weakness were all positively correlated with depressive symptoms in elderly inpatients (r =0.441,0.315,0.426,0.316,0.395 and 0.151,respectively,P ＜ 0.05).Logistic regression analysis showed that patients who had more severe frailty faced a much higher risk of developing depressive symptoms (OR=2.608,P＜0.05).Of the 5 indicators of frailty,slow gait speed and frailty also increased the risk of having depressive symptoms (OR =2.801 and 3.484,P ＜ 0.05).Conclusions Frailty degree,gait speed and fatigue are associated with increased risk of depression in the elderly.Depressive symptoms can be reduced in elderly inpatients with prevention and intervention of pre-frailty and frailty.
ABSTRACT
Objective To investigate the expression of Focal adhesion kinase (FAK) and p53 in rheumatoid arthritis (RA) Fibroblast Like Synoviocytes and to explore the pathogenesis of RA.This study also studied the effect of FAK and p53 on the proliferation of Fibroblast Like Synoviocytes in RA on order to identify new target for the treatment of RA.Methods Synovial tissue from RA patients were cultured in vitro;FLS were cultured in TNF-α (10 ng/ml) and different density of protease inhibitor (MG-132) (1,5,10,20 μmol/L)for 48 h.Then the level of mRNA of both FAK and p53 in each group was tested by real time polymerase chain reaction (RT-PCR).FLS were cultured with different density of protease inhibitor (MG-132) (1,5,10,20μmol/L) for 24 h,48 h,72 h,96 h then the cell proliferation of each group were tested.ANOVA was used to compare the means between groups.Results ① After TNF-α stimulating,the level of FAK mRNA was higher than the control group [(1.48±0.09 vs(1.03±0.33),F=7.807,P＜0.05).Compared with the control group,the level of p53 mRNA decreased [(0.97:±0.03) vs (1.30±0.39),F=19.933,P＞0.05).② After stimulated with different density of MG-132,the level of p53 mRNA was higher than the control group [(3.12±0.72) vs (1.30±0.39),F=19.933,P＜0.05),and the 5μ mol/L group was the highest of them.Compared with the control group,the level of FAK mRNA decreased [(0.93±0.20) vs (1.03±0.33),F=7.807,P＞0.05).③ After stimulated with different density of MG-132,the proliferation of FLS was slower than the control group (24 h F=16.654,P＜0.05;48 hF=13.652,P＜0.05;72 h F=72.999,P＜0.05;96 h F=51.533,P＜0.05).Conclusion In vitro,after stimulated with TNF-α,the level of mRNA of Focal adhesion kinase is increased,while the level of that decreases after MG-132 stimulation.Focal adhesion kinase is involved in the pathogenesis of rheumatoid arthritis.In vitro,after MG-132 stimulating,the level of mRNA of p53 is increased.p53 inhibits the excessive proliferation of RA synovial fibroblast cells and plays an important role in the pathogenesis of rheumatoid arthritis.
ABSTRACT
Objective To investigate the effect of hepatopoietin Cn(HPPCn) on liver stem cells.Methods In this study, WB-F344 cell line was used, and MTT and flow cytometry assay were conducted to determine cell proliferation and apoptosis.Transwell assay was used to test the migration of WB-F344 cells.A 2AAF-partial hepatectomy(PH) mouse model was used to observe the effect of HPPCn on liver stem cell proliferation in vivo.Results HPPCn enhanced WB-F344 cell proliferation and migration and activated the SphK1, Erk and Stat3 signal pathways.The analysis of the 2AAF-PH mouse model showed that oval cells in the experimental group far outnumbered those in control and the regeneration of the liver was improved post PH.Conclusion HPPCn can increase the liver stem cell proliferation and survival while promoting the regenenation of the liver by augmenting oval cell proliferation.
ABSTRACT
The stable isotope labeling by amino acids in culture (SILAC) based quantitative proteomics serves as a gold standard because of the high accuracy and throughput for protein identifications and quantification. In this study, we discussed the application of SILAC technology in mammal model, and developed quantitative internal standard for comparative proteomics of disease model. The C57BL/6J mice fed by special diet containing the 13C6-Lysine and bred F2 generation. We identified and analyzed total proteins of 9 mice tissues of F2 generation, including brain, lung, heart, stomach, intestine, liver, spleen, kidney, and muscle. Quantitative analysis information could evaluate the mice and different tissues' labeling efficiency. Liver was the most efficient, brain the least, and the labeling efficiency were 96.34%±0.90% and 92.62%±1.98% respectively. The average of the labeling efficiency of F2 generation was 95.80%±0.64%, which met the international standard (≥ 95%) for SILAC quantitative proteomics effective study. SILAC technology was successfully extended to mammalian model system, which will provide powerful tools for the mechanism study of the pathophysiology process with mouse model.
Subject(s)
Animals , Mice , Amino Acids , Chemistry , Diet , Isotope Labeling , Lysine , Chemistry , Mice, Inbred C57BL , Proteins , Chemistry , Proteomics , MethodsABSTRACT
Objective In this study,we elucidated the role of high mobility group box chromosomal protein 1 (HMGB1) in collagen-induced arthritis (CIA) rat and the antagonist role of ethyl pyruvate by using a rat model of CIA as the research object by comparing the expression of HMGB1 in normal control group,CIA model group and ethyl pyruvate group.Methods Thirty-six rats were randomly divided into 3 groups (n=12):normal control group,CIA group and ethyl pyruvate group.Then the 6 rats were dissected at the 6th,9th week respectively.Thc expression of HMGB1 was analyzed by immunohistochemistry and Pathology-image analysis software in the cytoplasma.The expression of HMGB1 mRNA with real time-polymerse chain reaction (PCR) was evaluate,and the HMGB1 expression of each group were compared with t-test.Results The immunohistochemical results of HMGB1 showed that the expression intensity in the normal control group,CIA model group and ethyl pyruvate group was 2.1±0.6,7.3±1.2,6.0±1.2 respectively at the 6th week; and 2.2±0.7,12.4±4.5,5.5±1.0 at the 9th week respectively.The HMGB1 mRNA real time-PCR results had shown that the relative quantification of the normal control group and CIA model group were 1,2.865,2.602respectively at the 6th week and 1.005,4.694,1.729 at the 9th week.At those two points, the HMGB1 expressions of HMGB1 antagonist group were significantly higher than those of the normal controls (P＜0.05).In addition,there was statistical significant difference(P＜0.05) in the HMGB1 expression when compared with the placebo group.Furthermore, when the degree of HMGB1 expression among the three groups was compared,the HMGB1 antagonist group was decreased significantly (P＜0.05).Conclusion The results has demonstrated that HMGB1 could induce inflammation in the synovial tissue of CIA rats,and has provided the rationale that HMBG 1 could be the target of treating rheumatoid arthritis (RA).The results of this study have shown that ethyl pyruvate could antagonize the effect of HMGB1.This finding may provide a new therapeutic target for the treatment of RA.
ABSTRACT
Objective To measure serum surfactant protein (SP) A and D levels in patients with interstitial lung disease associated with rheumatoid arthritis (RA).Methods Serum SP-A and SP-D levels of RA,RA-ILD patients and healthy controls were assessed using a sensitive enzyme-linked immunosorbent assay (ELISA).The relationship between SP-A and SP-D and RA-ILD was analyzed.The serum SP-A and SP-Dpositive rate was calculated for the three groups.The correlation between SP-A and SP-D with RF,anti-CCP,antinuclear antibody,antikeratin antibody,anti-perinuclear factor,C-reactive protein,erythrocyte sedimentation rate,were analyzed.Mean value of groups were compared with variance analysis,Spearmam rank correlation test was used for correlation analysis.Results The levels of serum SP-A in RA-ILD patients and RA patients as well as in healthy controls were [ (51.2±9.2),(25.9±2.6),( 15A±0.3 ) μg/L] respectively.The level of serum SP-D of the three groups was [ ( 42.5 ±8.1 ),(20.8 ± 1.5 ),( 16.6±0.8 ) μg/L ] respectively.The levels of serum SP-A and SP-D in patients with RA complicated with ILD were higher than those simple RA patients and healthy controls (P＜0.05).The levels of serum SP-A and SP-D in patients with RA were not significantly higher than those in healthy controls (P＞0.05).The positive rate of serum SP-A and SP-D in RA-ILD patients were significantly higher than those in simple RA patients and healthy controls.The positive rate of serum SP-D of RA-ILD patients was higher than that of SP-A.The levels of serum SP-A and SP-D in patients with RA complicated with ILD were correlated positively with age,C-reactive protein.The level of serum SP-D was correlated positively with RF,anti-CCP,antikeratin antibody.There was no correlation between the level of serum SP-A and SP-D with RA-ILD and antinuclear antibody,antiperinuclear factor,erythrocyte sedimentation rate.Conclusion The levels of serum SP-A and SP-D are correlated with RA-ILD and may be useful markers for ILD in patients with RA.These two paramenters may be helpful to early diagnosis of RA-ILD.The Serum SP-D levels are more sensitive in predicting the development of RA-ILD than other parameters and can help in assessing the severity of lung damage.
ABSTRACT
Objective To observe homing of mesenchymal stem cells (MSCs) in immune organs and inflammatory joints in collagen induced arthritis(CIA) rats. MethodsRats MSCs were isolated and expanded from bone marrow cells by density gradient centrifugation and adhering to the culture cell walls, and the phenotypes were assessed by flow cytometry. MSCs were labeled by PKH-26 and Brdu. Sixty-four rats were randomly divided into normal group and CIA group. Every 8 rats were sacrificed at 3, 11, 30, 42 days after transplantation of MSCs. At the end of the experiment, the specimens of thymus gland, spleen, ankle joints were exposed, fixed, decalcified, wrapped and cut into slices. Confocal laser scanning microscope and immunohistochemical method were used to observe migration and distribution of MSCs in different organs. Independent samples group t test with SPSS 12.0 software package was used for statistical analysis. ResultsIt was found that allogenic MSCs could stay in spleen, thymus gland and joints of CIA rats for a relatively long period (42days). Forty-two days after transplantation of MSCs, the average grey scale values of spleen and thymus gland in CIA group(37.5±8.8, 29.9±5.9 respectively) were significantly higher than the normal group(16.0±2.3,13.2±4.3 respectively), the average grey scale values of ankle joints in CIA group 78±8 was significantly lower than the normal group 93±14(P<0.05). ConclusionIt has been found that MSCs can stay in the injured tissue and organs preferentially.
ABSTRACT
Objective To report a case of progressive pseudorheumatoid dysplasia (PPD) with two kinds of WISP3 gene mutation. Methods A case of PPD was reported. Its clinical profile and the process of diagnosis were analyzed, and the related literature were reviewed. Results A 15-years old boy, who developed progressive joint pain and enlargement with spine involvement, was diagnosed as PPD. The erythrocyte sedimentation rate and C-reactive protein were in normal range, rheumatoid factor and anti-CCP antibody were all negative. HLA-B27 was also negative. Gene study discovered two kinds of mutations in Wnt1-inducible signaling pathway protein 3 (WISP3) gene: c.589+2T＞C and c.624dupA. Radiographic studies revealed severe osteoporosis without erosion, platyspondylia, enlargement of metaphysis and scoliosis deformity. The joint space of sacroiliac joint and articulation of pubis were significantly widened. Conclusion PPD is a rare autosomal recessive disorder characterized by cartilage homeostasis. It is associated with WISP3 gene mutations. Gene detection, laboratory examination and typical radiographic features are helpful for the diagnosis. This is the first report of c.589+2T＞C and c.624dupA mutations in patients with PPD in our country.
ABSTRACT
Objective To study the clinical characteristics and prognosis of interstitial lung disease (ILD) associated with polymyositis (PM) and dermatomyositis (DM). Methods The clinical data of 107 DM related ILD,and its frequency rate was 26.2%. Arthritis as the first symptom had a higher presenting rate in patients with ILD than in patients with non- ILD. Arthritis, dry cough and short of breath occurred more dyspnea presented in patients with DM-ILD, and there was serious myalgia and muscle weakness in patients More DM-ILD patients had high HBDH and AST than those in PM-ILD. High CK and CK-MB were more The 7 of 8 severe cases had DM-ILD in which 5 died of respiratory failure (death rate was 17.9% in PM/elevated ESR and CRP tend to complicate with ILD. The DM patients who have characteristic skin rashes and high AST level are prone to develop ILD. The PM patients who have high CK and CK-MB are susceptible to
ABSTRACT
Objective To study the effect of Na-2SeO-3 on experimental carcinogenesis of stomach and on p53 and p16 expression. Methods Weaning male Wistar rats were divided into four groups randomly:high selenium group(4mg/L),low selenium(2mg/L)group,experiment control group and normal control group.Wistar rat gastric cancer was induced by N-methyl-N′-nitro-N-nitrosoguanidine(MNNG,20mg/kg)given daily for 10days.Na 2SeO 3 was given by piped drinking before one week of MNNG administration.Rats were killed at the 43th week.The surface characters of gastric mucosa were observed with noked eyes.Histopathologic changes were observed by methods of HE staining and Alcian Blue Periodic acid Schiff reaction(AB-PAS).Changes of p53 and p16 were detected by SP immunohistochemical method.The immunohistochemical results were quantitatively analysed by image analysis.Statistical analysis was taken by SPSS. Results Dietary Na-2SeO-3(2mg/L,4mg/L)aggravated gastric erosion and hemorrhage and promoted intestinal metaphasia of gastric cancer (P0.05).Conclusion These results suggest that dietary Na-2SeO-3 by piped drinking might not decrease incidence of Wistar rat gastric cancer induced by MNNG.The mechanism may be associated with the mutations of p53 and abnormal expression of p16 gene.