Use of Non-Cryopreserved Peripheral Blood Stem Cells Is Associated with Adequate Engraftment in Patients with Multiple Myeloma Undergoing an Autologous Transplant

Autologous transplantation is the standard of care for transplant-eligible patients with multiple myeloma. Toward making this treatment accessible in developing countries, there are significant challenges like resource constraints and access to cryopreservation facilities. We performed a retrospective analysis of patients with multiple myeloma who underwent autologous transplantation using granulocyte colony-stimulating factor (G-CSF)-mobilized non-cryopreserved grafts at our institution from January 1995 to December 2014. Peripheral blood stem cells (PBSCs) were harvested over 1 to 2 days after G-CSF mobilization. After apheresis, PBSCs were stored at 4°C in a blood bank refrigerator for up to 72 hours. During the study period, 224 patients with multiple myeloma underwent autologous transplantation using G-CSF–mobilized non-cryopreserved grafts. The number of days of stem cell harvest was 1 in 91 patients (40.6%) and 2 in 133 patients (59.4%). The median CD34 cell dose was 4.87?×?10⁶/kg (range, 1.15 to 23.7). All patients except 1 engrafted. The median time to neutrophil engraftment was 12 days (range, 9 to 22). The median time to platelet engraftment was 17 days (range, 10 to 44). In a resource-limited setting, the use of G-CSF–mobilized non-cryopreserved grafts results in adequate engraftment for most patients with multiple myeloma undergoing autologous stem cell transplantation.     

Graft failure after T-cell-depleted human leukocyte antigen identical marrow transplants for leukemia: II. In vitro analyses of host effector mechanisms

To identify mechanisms potentially contributing to graft failure, 19 leukemic recipients of T-cell-depleted marrow transplants who failed to engraft following a transplant of HLA identical sibling marrow depleted of T cells by soybean agglutinin (SBA) and sheep erythrocytes (E) were evaluated. Peripheral blood mononuclear cells isolated at the time of failure were consistently of host origin, bearing the phenotype of suppressor T cells (CD3+, CD8+, Leu 7+). A direct cytolytic effect on 51Cr-labeled donor-derived target cells was not detected, a finding that contrasts with the donor-specific cytotoxic host T lymphocytes that have been regularly observed in patients rejecting HLA nonidentical SBA -E- BMTs. However, these host T cells did exhibit a strong and specific suppressive activity against the donor marrow CFU- GM in vitro. Furthermore, in contrast to prior findings in durably engrafted recipients of SBA -E- BMTs, the lymphocytes isolated prior to or at the time of graft failure lacked natural killer surface antigen expression and effector function.     

窦房结脂肪垫对犬右上肺静脉电生理特性影响的研究

目的研究不同水平刺激窦房结脂肪垫(SANFP)对右房(RA)及右上肺静脉(RSPV)的有效不应期(ERP)及心房颤动(简称房颤)诱发率的影响,探讨SANFP对房颤发生维持的作用。方法6只犬麻醉后经右侧开胸暴露RSPV及SANFP,以0.6～2,5,8mV三种不同电压强度水平、60ms频率刺激SANFP,同时以S1S2刺激观察三种水平下RA游离壁远、中、近端及RSPV远、中、近端ERP的变化;同样方法刺激SANFP以S1S1和S1S2程序刺激诱发房颤,测定房颤的诱发率。结果以5mV电压刺激窦房结脂肪垫RSPV近端ERP较基础时明显缩短(90±24msvs109±16ms,P<0.05),其房颤诱发率50%;以5,8mV电压刺激SANFP时RA游离壁近端、中端ERP变化较基础时明显缩短(96±20msvs117±14ms,65±20msvs117±14ms,P均<0.05),其房颤诱发率100%。结论窦房结脂肪垫可能在肺静脉起源的房颤的诱发和维持中起了重要作用。     

老年亚临床甲状腺功能减退症合并脑梗死患者甲状腺功能及血脂水平分析

目的 分析60岁以上亚临床甲状腺功能减退症(简称甲减)合并脑梗死患者的甲状腺功能、血脂水平.方法 将84例亚临床甲减合并脑梗死患者纳入合并组,84例亚临床甲减患者纳入甲减组,84例脑梗死患者纳入脑梗死组,并将同期常规体检的84例健康老人纳入健康组,4组受试者年龄均大于60岁,比较4组受试者的甲状腺功能指标[促甲状腺激素(TSH)、游离三碘甲状腺原氨酸(FT3)、游离甲状腺素(FT4)]、血脂指标[甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)]水平差异.结果 合并组、甲减组的TSH水平高于脑梗死组、健康组,差异有统计学意义(P＜0.05).合并组、甲减组、脑梗死组TG、TC、LDL-C水平高于健康组,合并组、甲减组TG、TC、LDL-C水平高于脑梗死组,合并组TG、TC、LDL-C水平高于甲减组,差异均有统计学意义(P＜0.05).结论 60岁以上亚临床甲减合并脑梗死患者的甲状腺功能、血脂水平存在明显异常,临床应予以重视并及时治疗.     

CVVH治疗对脓毒症并发急性肾损伤患者免疫功能的影响

目的 探讨连续性静脉—静脉血液滤过(CVVH)治疗对脓毒症并发急性肾损伤(AKI)患者免疫功能的影响.方法 选择脓毒症并发AKI患者21例,均在基础治疗的基础上给予CVVH治疗.分别观察患者治疗前后CD3+、CD3+/CD4+、CD3+/CD8+、C反应蛋白(CRP)、WBC、尿素氮(BUN)、血肌酐(Cr)、急性生理与慢性健康评分Ⅱ( APACHE Ⅱ)的变化.结果 CVVH治疗后,大多数患者临床症状改善.与治疗前比较,治疗后CD3+、CD3+/CD4+、CD3+/CD8+显著升高(P均＜0.05);APACHE Ⅱ、CRP、WBC、BUN、Cr明显降低(P均＜0.05).结论 CVVH能调节脓毒症并发AKI患者的T淋巴细胞亚群免疫稳态,改善患者预后.     

Procrusts重叠以及多元统计应用于安氏Ⅱ类错颅面分类的研究

目的:使用Procrusts标准化以及聚类分析、判别分析方法对安氏Ⅱ类错(牙合)颅面形态进行分析,初步探讨使用形态测量以及多元统计对错(牙合)进行分类的方法.方法:收集北京大学口腔医学院·口腔医院正畸科1997～2000年就诊的安氏Ⅱ类错(牙合)患者894名,通过影像测量及最小平方和重叠法(PS)进行聚类分析以及亚型划分,并利用判别分析判别聚类分析准确性,建立判别方程,为今后新样本的分类和治疗后样本颅面形态的变化研究打下基础.结果:将样本头颅侧位片进行Procrusts标准化后,使用聚类分析将其分出11个具有各自形态特征的类型,建立3个判别方程,交互验证准确率为80.17%.结论:PS重叠法用于形态学分类具有一定的优势;利用聚类分析,可以对安氏Ⅱ类错(牙合)进行进一步的划分;对于不同类别,判别的准确率有所不同;判别方程的建立为今后新样本以及治疗后样本分型的研究打下基础.     

中国部分市县前列腺癌发病趋势比较研究

目的 探讨中国大陆前列腺癌发病的流行病学特征.方法收集整理中国大陆30个肿瘤登记处1988-2002年15年间前列腺癌发病登记的数据资料,选取数据较为齐全的北京、天津、上海、武汉、哈尔滨、河北磁县、江苏肩东、浙江嘉善、广西扶绥、福建长乐、河南林州11个登记处的资料,按5年1个时段分为1988-1992、1993-1997、1998-2002年3个时间段,比较分析前列腺癌发病率、病死率,采用美国癌症研究所开发的统计软件Joinpoint Regression Program 3.3.1分析其流行趋势.通过对发病率的对数转换线性回归分析计算年度变化百分比.结果 30个登记处1988-1992、1993-1997、1998-2002年前列腺癌的发病率分别为1.96/10万、3.09/10万、4.36/10万,发病率有明显上升趋势.但与美国、加拿大、欧洲部分国家和地区比仍处于较低水平.结论 我国前列腺癌发病率呈现逐年上升趋势,将成为影响我国居民健康的主要恶性肿瘤之一,需引起重视.     

中国部分市县前列腺癌发病趋势比较研究

目的 探讨中国大陆前列腺癌发病的流行病学特征.方法收集整理中国大陆30个肿瘤登记处1988-2002年15年间前列腺癌发病登记的数据资料,选取数据较为齐全的北京、天津、上海、武汉、哈尔滨、河北磁县、江苏肩东、浙江嘉善、广西扶绥、福建长乐、河南林州11个登记处的资料,按5年1个时段分为1988-1992、1993-1997、1998-2002年3个时间段,比较分析前列腺癌发病率、病死率,采用美国癌症研究所开发的统计软件Joinpoint Regression Program 3.3.1分析其流行趋势.通过对发病率的对数转换线性回归分析计算年度变化百分比.结果 30个登记处1988-1992、1993-1997、1998-2002年前列腺癌的发病率分别为1.96/10万、3.09/10万、4.36/10万,发病率有明显上升趋势.但与美国、加拿大、欧洲部分国家和地区比仍处于较低水平.结论 我国前列腺癌发病率呈现逐年上升趋势,将成为影响我国居民健康的主要恶性肿瘤之一,需引起重视.     

PTEN expression is down‐regulated in liver tissues of rats with hepatic fibrosis induced by biliary stenosis

The gene phosphatase and tensin homolog deleted on chromosome 10 (PTEN) codes for a tumor‐suppressor phospholipid phosphatase. Deletion, mutation or abnormal expression of PTEN is commonly found in many kinds of malignant tumors. At the time of this study, though, the role of PTEN expression in the pathology of hepatic fibrosis remains unclear. In this study, we investigate the dynamic expression of PTEN in a rat model of hepatic fibrosis, with special emphasis on the activation and proliferation of hepatic stellate cells (HSC) in vivo. The rat model of hepatic fibrosis used in this study employed common bile duct ligation. At four time points, the expression of PTEN in hepatic tissues and activated HSC in rat liver tissues was measured by immunohistochemical staining, Western blotting, real‐time fluorescent quantitative PCR and immunofluorescence confocal laser scanning microscopy, respectively. Further, α‐smooth muscle actin (α‐SMA), an activated HSC marker in rat liver tissues, was detected by immunohistochemical staining. This study showed that aggravation of hepatic fibrosis led to gradually decreasing expression of PTEN in the hepatic tissues. Further, as hepatic fibrosis worsens, PTEN‐expressing activated HSC accounts for an increasingly smaller percentage of all activated HSC. In contrast, the percentage of α‐SMA‐expressing HSC cells increases significantly. In conclusion, expression of PTEN mRNA and protein is down‐regulated in fibrogenic rat liver tissue, and its expression in HSC in vivo also decreases with progression of fibrosis. Thus, these results show that the dynamic expression of PTEN in hepatic tissues negatively correlates with activation and proliferation of HSC.