We developed two complement-fixing MoAbsHIMand HIM(murine)that were specifically reac-tive with chronic myelogenous leukemia (CML) cells.They were capable of fixing human or rabbit com-plement and suitable for CML cel...We developed two complement-fixing MoAbsHIMand HIM(murine)that were specifically reac-tive with chronic myelogenous leukemia (CML) cells.They were capable of fixing human or rabbit com-plement and suitable for CML cells purging of re-mission marrow from CML patients.HIMreactedwith majority leukemic cells form 7 out of 10 CMLpatients by complement-mediated cytotoxicity(C’MC)assay(positive cells 80%—90%),HIMreacted withmajority CML cells from 4 out of 5 CML by C’MCassay(positive cells 80%—90%).Treatment withHIMor HIMand human C’was capable of lysing97% of K562,U937,HL-60 and CML cells in a 20fold excess of unrelated cells by indirect FITC+EBstain.Using limited dilution culture,incubation withHIMand C’produced 1.5 logs inhibition of growthin K562 cells,and 1.9 logs in U937 cells,and withHIMand C’produced 2.9 logs inhibition in HL-60cells and 3.0 logs in U937 cells.Both MoAbs cocktailwas shown 1.8 logs in K562 cells and 3.2 logs in U937cells.They were no suppression on the growth o展开更多
Mesenchymal stem cells (MSCs) are non-hematopoietic stem cells with the capacity to differentiate into tissues of both mesenchymal and non-mesenchymal origin. MSCs can differentiate into osteoblastic, chondrogenic, an...Mesenchymal stem cells (MSCs) are non-hematopoietic stem cells with the capacity to differentiate into tissues of both mesenchymal and non-mesenchymal origin. MSCs can differentiate into osteoblastic, chondrogenic, and adipogenic lineages, although recent studies have demonstrated that MSCs are also able to differentiate into other lineages, including neuronal and cardiomyogenic lineages. Since their original isolation from the bone marrow, MSCs have been successfully harvested from many other tissues. Their ease of isolation and ex vivo expansion combined with their immunoprivileged nature has made these cells popular candidates for stem cell therapies. These cells have the potential to alter disease pathophysiology through many modalities including cytokine secretion, capacity to differentiate along various lineages, immune modulation and direct cell-cell interaction with diseased tissue. Here we first review basic features of MSC biology including MSC characteristics in culture, homing mechanisms, differentiation capabilities and immune modulation. We then highlight some in vivo and clinical evidence supporting the therapeutic roles of MSCs and their uses in orthopedic, autoimmune, and ischemic disorders.展开更多
文摘We developed two complement-fixing MoAbsHIMand HIM(murine)that were specifically reac-tive with chronic myelogenous leukemia (CML) cells.They were capable of fixing human or rabbit com-plement and suitable for CML cells purging of re-mission marrow from CML patients.HIMreactedwith majority leukemic cells form 7 out of 10 CMLpatients by complement-mediated cytotoxicity(C’MC)assay(positive cells 80%—90%),HIMreacted withmajority CML cells from 4 out of 5 CML by C’MCassay(positive cells 80%—90%).Treatment withHIMor HIMand human C’was capable of lysing97% of K562,U937,HL-60 and CML cells in a 20fold excess of unrelated cells by indirect FITC+EBstain.Using limited dilution culture,incubation withHIMand C’produced 1.5 logs inhibition of growthin K562 cells,and 1.9 logs in U937 cells,and withHIMand C’produced 2.9 logs inhibition in HL-60cells and 3.0 logs in U937 cells.Both MoAbs cocktailwas shown 1.8 logs in K562 cells and 3.2 logs in U937cells.They were no suppression on the growth o
文摘目的探讨自体骨髓干细胞(bone marrow stem cells,BMSCs)经胰背动脉移植治疗2型糖尿病(type 2 diabe-tes mellitus,T2DM)的有效性及安全性。方法回顾性分析2009年6月至2011年4月在我科住院符合纳入标准的6例2型糖尿病患者(3男3女),年龄(45.67±14.92)岁,实施自体骨髓干细胞移植。①动员骨髓;②采集骨髓;③分离骨髓干细胞;④将骨髓干细胞注入胰背动脉;⑤观察移植前后血糖、糖化血红蛋白(glycosylated hemoglobin,HbA1c)、胰岛功能、C肽曲线下面积(area under curve for C-peptide,AUCC)及胰岛素用量等变化,记录治疗过程中及治疗后的不良反应;对干细胞移植的安全性及疗效进行评估。结果移植前后:①糖化血红蛋白由(10.33±2.78)%降至(7.05±0.90)%,有2例患者的糖化血红蛋白<7%;②空腹C肽(fasting C-peptide,FC-P)由(0.71±0.54)ng/ml升至(1.54±0.63)ng/ml(P<0.05),餐后2 h C肽(2 h postprandial C-peptide,2 h C-P)由(1.63±0.88)ng/ml升至(4.67±2.31)ng/ml(P<0.05),C肽曲线下面积由(2.29±1.31)ng/ml增至(6.05±2.94)ng/ml(P<0.05);③胰岛素用量由(27.17±13.08)U/d降到(18.63±7.04)U/d,其中2位患者停用皮下注射胰岛素改为口服药物降糖治疗;④自体骨髓干细胞移植过程中及术后随访均未观察到不良反应,移植前后肿瘤标志物及血淀粉酶均正常。结论自体骨髓来源干细胞移植可改善2型糖尿病患者的胰岛功能,减轻其对外源性降糖药物的依赖,且安全性可行。
基金Supported by (in part) Research Grants from the Brinson Foundation (to He TC)the Orthopaedic Research and Education Foundation (to Haydon RC and Luu HH)+3 种基金the National Institutes of Health (to He TC, Haydon RC, Luu HH and Reid RR)The 863 Program of Ministry of Science and Technology of China,#2007AA2z400 (to He TC and Deng ZL)the Natural Science Foundation of China (#30901530 to Luo X, #30800658 to Luo J,and #30772211 to Deng ZL)the Natural Science Foundation Project of Chongqing Science and Technology Commission#2008BB5396 (to Chen L) and #2009BB5060 (to Luo J)
文摘Mesenchymal stem cells (MSCs) are non-hematopoietic stem cells with the capacity to differentiate into tissues of both mesenchymal and non-mesenchymal origin. MSCs can differentiate into osteoblastic, chondrogenic, and adipogenic lineages, although recent studies have demonstrated that MSCs are also able to differentiate into other lineages, including neuronal and cardiomyogenic lineages. Since their original isolation from the bone marrow, MSCs have been successfully harvested from many other tissues. Their ease of isolation and ex vivo expansion combined with their immunoprivileged nature has made these cells popular candidates for stem cell therapies. These cells have the potential to alter disease pathophysiology through many modalities including cytokine secretion, capacity to differentiate along various lineages, immune modulation and direct cell-cell interaction with diseased tissue. Here we first review basic features of MSC biology including MSC characteristics in culture, homing mechanisms, differentiation capabilities and immune modulation. We then highlight some in vivo and clinical evidence supporting the therapeutic roles of MSCs and their uses in orthopedic, autoimmune, and ischemic disorders.
