Objective To investigate the role of bone marrow-derived cells (BMC) plays in choroidal neovascularization (CNV).Methods Green fluorescent protein (GFP) chimeric mice were built by transplanting BMC from GFP transgenic mice to adult wild type C57BL/6J mice. Retinal laser photocoagulation was used to induce CNV in the chimeric mice (treated group) and adult wild type mice (control group). Four weeks later, choroidal flatmount was prepared to detect GFP positive BMC expression in the CNV lesions, and immunofluorescence stain was used to determine the expression of vascular endothelia growth factor (VEGF) and basic fibroblast cell growth factor (bFGF).Results Twenty-nine days after photocoagulation lots of GFPpositive BMC presented in the CNV area, which accounted approximate 16.22% of the total CNV area. Some BMC in the CNV area expressed VEGF and bFGF. Conclusions BMC may play an important role in CNV by forming new vessles and secreting angiogenic factors.
目的 观察藏医滋补方“巴桑母酥油丸”对放射线-化学复合损伤小鼠骨髓不同细胞群增殖能力的影响，探讨其促进放射线-化学复合损伤机体外周血象恢复的机制。 方法 采用造血祖细胞集落分析方法、流式细胞术，检测灌胃巴桑母酥油丸后放射线-化学复合损伤小鼠骨髓细胞中早期红系祖细胞（CFU-E）、晚期造血祖细胞（BFU-E）、粒-巨噬系祖细胞（CFU-GM）、巨核系祖细胞（CFU-Meg）集落产率、骨髓细胞增殖周期各时相细胞比例、造血干细胞抗原-1（Sca-1）免疫表型阳性细胞数变化情况。 结果 巴桑母酥油丸组骨髓细胞S+G2/M期细胞比例高于生理盐水组（P＜0.05）和自然恢复的空白组（P＜0.01）；CFU-E、BFU-E、CFU-GM集落产率高于生理盐水组和空白组（P＜0.05）；CFU-Meg集落产率、Sca-1+细胞数在各组间差异无统计学意义（P＞0.05）。 结论 巴桑母酥油丸对放射线-化学复合损伤小鼠骨髓细胞具有促进增殖的作用，这可能是其促进放射线-化学复合损伤机体外周血象恢复的途径，但对不同阶段、不同系别的造血细胞其促进作用不同。
ObjectivesTo systematically review the efficacy and safety of autologous bone marrow cells therapy for patients with diabetic foot. GRADE system was used to evaluate the evidence quality of outcomes.MethodsWe searched databases including PubMed, EMbase, The Cochrane Library, CBM, WanFang Data and CNKI for randomized controlled trials (RCTs) about bone marrow cell transplantation in patients with diabetic foot from inception to February 28th 2017. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Meta-analysis was performed using RevMan 5.3 software. The evidence quality was evaluated by using GRADE profiler 3.6 software.ResultsFour RCTs were included. Meta-analysis showed that the bone marrow cell transplantation could decrease the rate of amputation (RR=0.08, 95%CI 0.00 to 1.32, P=0.08) and rest pain score (MD=–1.89, 95%CI –2.24 to –1.55, P<0.000 01), increase the rate of ameliorate ulcer healing (RR=2.01, 95%CI 1.45 to 2.79,P<0.000 1) and the quantity of new collateral vessels (MD=1.33, 95%CI 0.60 to 2.05,P<0.000 3). Besides, bone marrow cell transplantation could improve ankle-brachial index (MD=0.16, 95%CI 0.10 to 0.22,P<0.000 01) and transcutaneous arterial oxygen tension (MD=18.81, 95%CI 16.06 to 21.57,P<0.000 01). No adverse event was reported for all included studies. The qualities of evidence for all outcomes were rated as "low" to "very low".ConclusionBased on the current evidence, autologous bone marrow cells transplantation therapy has a certain effect and it is safe for patients with diabetic foot. However, due to the limited quantity and quality of included studies, the above conclusions are still needed more multicenter clinical trials with large sample size to confirm.
ObjectiveTo explore the clinical diagnosis and treatment of Talaromyces marneffei (TM) infection by bone marrow examination, and to clarify the important role and significance of bone marrow smear and pathogenic examination.MethodsRetrospective analysis was conducted on a case of disseminated TM infection that was clearly diagnosed through bone marrow related examination. Literature review of TM infection was conducted by retrieving relevant case reports at home and abroad from 1990 to 2018.ResultsThe patient was a 23-year-old man with recurrent cough and onset of fever, superficial lymph node enlargement in multiple parts of the body, no abnormal chest CT sign, and poor efficacy in anti-infection treatment. The patient developed progressive abdominal pain, accompanied by systemic papulosis, decreased consciousness, and progressive decline of blood cells. The patient underwent bone marrow puncture surgery in our hospital, and developed circulatory and respiratory failure half an hour after surgery. TM was confirmed bybone marrow smear and pathogenic culture. In the literature review, 2 855 cases of TM infection were retrieved, among which the majority of cases were confirmed through blood and bone marrow related examination. The positive rate of bone marrow culture was significantly higher than that of blood culture (72.4% and 66.8%, respectively, P=0.007). Compared with bone marrow culture, the misdiagnosis and missed diagnosis rate of bone marrow smear microscopy was 27.6%. Patients diagnosed with TM infection by bone marrow examination had the highest HIV positive rate (95.7%).ConclusionsThe examination of bone marrow cells and the culture are of great clinical significance for the diagnosis of TM infection. TM infection should be identified in patients suspected of HIV positive with fever, lymph node enlargement and abnormal blood routine.
ObjectiveTo observe the expressions of miR-183 and retinal dehydrogenase 11 (RDH11) in exosomes derived from bone marrow mesenchymal stem cells (BMSC), and to preliminarily explore their targeting relationship and their effects on retinal pigment epithelial (RPE) cells. MethodsBMSC from C57BL/6 (C57) mice were isolated and cultured, and BMSC-derived exosomes were identified. BMSC were divided into blank group, simulation blank control group (mimic-NC group), miR-183 simulation group (miR-183-mimic group). C57 mice and retinal degeneration 10 (rd10) mouse RPE cells were cultured with reference to literature methods. RPE cells from rd10 mice were transfected with BMSC exosomes and co-cultured and divided into control group, exosome group, mimic-NC-exosome group (mimic-NC-exo group), miR-183-mimic-exosome group (miR-183-mimic-exo group). The relative expression levels of miR-183, RDH11 mRNA and protein in C57 mice, rd10 mice and RPE cells in each group were detected by real-time quantitative polymerase chain reaction and western blotting. The targeting relationship between miR-183 and RDH11 was analyzed by bioinformatics website and dual luciferase reporter. Cell counting kit 8 was used to detect the effect of miR-183 on BMSC exosomes on RPE cell proliferation; in situ labeling end labeling method was used to detect RPE cells apoptosis. One-way ANOVA was used to compare multiple groups. ResultsCompared with C57 mouse RPE cells, the relative expression of miR-183 in rd10 mouse RPE cells was down-regulated, and the relative expression of RDH11 mRNA was up-regulated, and the differences were statistically significant (t=5.230, 8.548; P=0.006, 0.001). Compared with the blank group and the mimic-NC group, the relative expression of miR-183 mRNA in the exosomes of the miR-183-mimics group was significantly increased (F=60.130, P＜0.05). After 24 h of co-culture, exosomes entered RPE cells. Compared with the mimic-NC-exo group, the relative expression of miR-183 mRNA in RPE cells in the miR-183-mimic-exo group was significantly increased, the proliferation ability was enhanced (t=7.311, P=0.002), and the number of apoptotic cells was decreased (F=10.949, P=0.012), and the differences were statistically significant (t=4.571, P=0.002). Bioinformatics website and dual-luciferase report confirmed that miR-183 has a targeting relationship with RDH11. Compared with the mimic-NC group, the relative expression of RDH11 mRNA and protein in the exosomes of the miR-183-mimic group was decreased, and the difference was statistically significant (t=5.361, 6.591; P=0.006, 0.003). After co-culture, compared with the control group, there was no significant difference in the relative expression of RDH11 mRNA and protein in RPE cells in the exosome group (t=0.169, 1.134; P=0.874, 0.320); The relative expressions of RDH11 mRNA and protein in RPE cells in -183-mimic-exo group were decreased, and the difference was statistically significant (t=5.554, 5.546; P=0.005, 0.005). ConclusionUp-regulation of BMSC-derived exosomal miR-183 promote the proliferation of RPE cells in vitro by targeting the expression of RDH11 and reduce the number of apoptosis.