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1.
N Dubosc-Marchenay F Lacombe P Dumain G Marit M Montastruc F Belloc J Reiffers 《Hematological oncology》1992,10(5):235-249
Bone marrow blast cell antigen expression from 86 patients with de novo acute myeloid leukemias (AML) was studied and correlated with FAB classification and clinical outcome. Among a panel of 14 monoclonal antibodies routinely used for the diagnosis of acute leukemias we studied the expression of six antibodies (CD13, CD15, VIM2, CD33, CD14, CD34) of the granulomonocytic lineage and found that some of them were useful for diagnosis and/or prognosis. For FAB subclassification of AML, the CD13 or VIM2 antigen expression was of no benefit. Monocytic leukemias (M4 + M5PD + M5WD) more frequently expressed CD34 antigen (28/31) than granulocytic (M1 + M2 + M3) subtypes (33/53) (P < 0.01). Finally, the most striking differences were found with CD14 antigen expression: CD14 antigen was more frequently expressed in M4 + M5 leukemias (21/31) than in M1 + M2 + M3 subtypes (12/33) (P < 0.01). The mean percentage of CD14 positive blast cells was accordingly higher in monocytic leukemias than in granulocytic leukemias and the difference was highly significant (P < 0.0001). The CD15 antigen was more frequently expressed in differentiated leukemias (M2 + M3 + M4 + M5WD) (35/44) than in poorly differentiated forms (M1 + M5PD) (17/37) (P < 0.001). The statistical difference was higher when the mean percentage of CD15 positive blast cells were compared (P < 0.0003). Moreover these latter percentages were different in M1 and M2 subtypes (P < 0.003). The blast cell expression of CD13, CD14, CD15 or CD33 was not predictive of the length of CR or survival. Moreover, our results support previously published findings suggesting a longer overall survival duration for patients whose leukemic cells do not express the CD34 antigen (P < 0.01). We also confirm that patients with the more differentiated subtypes of AML (CD13-, CD34+) tend to survive longer than patients with the less differentiated subtypes of AML (CD13-, CD34+) (P < 0.001). 相似文献
2.
Genetically modified mice offer a wide range of possibilities in preclinical drug discovery, e.g. for use in target identification, target validation and disease model generation. However, genomic modification and alteration in gene expression may cause unpredicted phenotypic alterations in the organism other than the intended ones. The aim of this study was to determine the importance of establishing the phenotype of transgenic and knockout mice models for use in pharmaceutical research.
A total number of 51 mouse models (transgenic and knockout) produced at AstraZeneca during a 4 year period were subjected to a thorough phenotyping package covering clinical as well as morphological aspects. Phenotype abnormalities were recorded in 36 (70.6%) of the mouse models. The majority of findings were considered to be minor in magnitude. Histopathological changes related to the genotype of the animals were observed in 33% of the mouse models, underlining the importance of pathology in the phenotyping program. 相似文献
3.
Zhang Y Siebert R Matthiesen P Harder S Theile M Scherneck S Schlegelberger B 《Virchows Archiv : an international journal of pathology》2000,436(3):271-275
For the first time, combined immunophenotyping and fluorescence in situ hybridization (FISH) technique according to the ”fluorescence
immunophenotyping and interphase cytogenetics as a tool for investigation of neoplasms” (FICTION) technique have been successfully
applied in solid tumors. Thus, we were able to visualize the antigen expression of cells with chromosomal deletions of a tumor
suppressor region directly. In six breast carcinoma cell lines, we investigated the correlation between estrogen receptor
(ER) expression status and deletions of the estrogen receptor gene (ESR). To screen for deletions of the ESR gene, dual-color
FISH was performed with a YAC (yeast artificial chromosome) probe containing the ESR gene and, as internal control, with a
centromeric probe of chromosome 6. Deletions of the ESR gene were detected in four of six cell lines. For direct comparison
of ER expression with the copy number of the ESR gene at the single cell level, immunophenotyping with mouse anti-human ER
antibody was combined with FISH with the YAC probe containing the ESR gene according to the FICTION technique. There was no
correlation between lack of or reduced ER expression and deletions of the ESR gene. One cell line with deletions of the ESR
gene did express ER on the protein level, while another cell line without a deletion did not. Cells with deletions of the
ESR gene were either ER expression positive or negative. The staining intensity of ER expression was not associated with the
copy number of the ESR gene. Thus, this FICTION study unequivocally shows that deletions of the ESR gene are not the major
cause of absent or reduced ER expression in breast carcinoma cell lines.
Received: 6 September 1999 / Accepted: 14 September 1999 相似文献
4.
目的 研究传染性单核细胞增多症(IM)的临床特征、病理特点、免疫表型和EB病毒原位感染特征,以提高对IM的认识和诊断水平.方法 采用HE染色以及免疫组织化学、原位杂交技术,结合临床资料分析,对15例IM进行了临床病理、免疫表型和EB病毒感染的研究.结果 (1)IM多见于儿童和青年人(中位年龄18岁),起病急,常有发热(12例),伴浅表淋巴结肿大,多数在短期内痊愈.(2)病变以T区增生为主,斑驳状改变常见,细胞混杂,种类多样,可见B细胞分化谱(活化淋巴样母细胞、免疫母细胞、浆样细胞、浆细胞),包膜不厚,间质不多.(3)病变中以CD3阳性的小T淋巴细胞为主,部分活化的淋巴样母细胞和免疫母细胞表达CD20和CD30,信号强弱不等,散在分布.(4)所有病例都有EB病毒编码的小RNA(EBER)阳性细胞,数量多少不一(10~100个/HPF),大中小淋巴细胞均可阳性,主要分布在T区,也见于套区、初级滤泡和生发中心内.结论 进一步确认了IM是EB病毒引起的一种急性自限性淋巴组织增生性疾病.IM在临床、病理、免疫表型和EB病毒感染方面都具有特点,只有综合考虑这4方面的信息才能减少错误,做出更准确的诊断. 相似文献
5.
L. J. Gardner J. M. Polski R. Fallon C. H. Dunphy 《Virchows Archiv : an international journal of pathology》1998,433(1):35-40
CD56 and CD57 are commonly considered as natural killer and neuroectodermal markers, but their expression has been identified
in a wide spectrum of neoplasms including some cases of Ewing’s sarcoma (ES) and primitive neuroectodermal tumor (PNET). We
report two cases of small, round blue cell tumor (SRBCT), in which flow cytometry immunophenotyping (FCI) detected strong
expression of CD56 and CD57 (one case). Immunohistochemical staining with Leu-19 and Leu-7 confirmed the FI results. Although
CD56 and CD57 expression is consistent with ES/PNET, it can be potentially misleading if results of FCI are interpreted in
the absence of other findings. These cases suggest the utility of FCI in undifferentiated SRBCT. The literature on CD56 and
CD57 expression in ES/PNET is reviewed and discussed.
Received: 5 January 1998 / Accepted: 19 February 1998 相似文献
6.
Ki-lantigen(CD3o)waslO5oOo/12oooOglycoproteindistinguishedbymonoclonalantibodyKi-lwhichwasmadefromHodgkin'sdisease(HD)cellsstrainL-428,'eXPressedonHDcellsandReed-Sternberg(R-S)cellsatfirstthoughtItwasfoundbySteinandothersinl985,whonamedKi-lstrongpositiveNHLasKi-llymphoma,thatKi-lantigenwasalsoexpressedonsomeNHL.2Theresearchesonthisspecialtypeoflymphomahavealreadyappearedabroad.WehavecollectedfivecasesofKi-lpositiveNHLandnowdiscusstheirclinicalhistopathologicalandimmunophenotypicfe… 相似文献
7.
目的 研究小儿CD7抗原阳性急性髓系白血病 (CD7+AML)的临床生物学特征及治疗效果。方法 对 55例初治小儿AML进行细胞形态学、免疫表型、多药耐药P糖蛋白 (P1 70 )检测 ,临床观察 ,并常规采用HAE方案诱导治疗 ,判定疗效。结果2 3例CD7+小儿AML在FAB分型中以M2 、M5 多见。M3 中无一例CD7抗原表达 ,将CD7+与CD7-两组小儿AML进行对比 ,CD7+AML具有肝脏明显增大 (P <0 0 0 5) ,外周血白细胞数、原始细胞比例及P -糖蛋白表达增高等特点 (P <0 0 0 5,P <0 0 1及P <0 0 5) ,且年龄偏低 ,中位数年龄 7 6岁 (P <0 0 1 ) ,治疗效果差 ,完全缓解率4 3% ,达首次缓解中位时间为 55 5天。结论 小儿CD7+AML具有独特的临床生物学特征 ,常表达P -糖蛋白 ,临床症状重 ,治疗效果差 ,完全缓解率低 (P <0 0 5) ,达首次缓解时间长 (P <0 0 5)。 相似文献
8.
目的:探讨三色荧光标记流式细胞术CD45辅助设门检测儿童急性淋巴细胞白血病(CALL)免疫表型的临床应用及意义。方法:采用流式细胞仪和几组三色荧光标记抗体检测25例FAB分型为ALL的儿童骨髓或外周血免疫表型。结果:25例ALL儿童中,B型淋巴细胞白血病14例,T型淋巴细胞白血病6例,双标记5例,在T-ALL中,淋系抗原阳性率表达顺序为CD7>CD3>CD5,在B-ALL中,淋系抗原阳性率表达顺序为CD19>CD10>CD22>CD20,在T-ALL、B-ALL及双标记中还可同时表达髓系抗原(CD13、CD14、CD15、CD33),且髓系标记抗原在T-ALL与B-ALL中出现的频率相同。结论:三色荧光标记流式细胞术CD45/SSC设门技术检测儿童急性淋巴细胞白血病免疫表型,可准确将幼稚细胞从正常细胞群中分离出来并专门对异常细胞群进行免疫表型分析,将淋巴细胞白血病分为B型和T型白血病及双标记,并能反映髓系抗原阳性的ALL(M y+ALL),对指导临床治疗有重要价值。 相似文献
9.
目的:观察新抗人白细胞分化抗原ZCH-7-2D3单克隆抗体(单抗)与白血病细胞的反应性及其在白血病免疫学诊断分型中的意义。方法:采用CD45设门和多色流式细胞术,对经30余种标准单抗业已定型的100例白血病患者新鲜的骨髓细胞或外周血标本进行流式细胞术分析。结杲:2D3抗原在急性淋巴细胞性白血病(ALL)病例中的阳性率(10/31)明显低于急性髓细胞性白血病(AML)(39/55,P〈0.01);2D3在3例B系/髓系混合型白血病病例中均有表达,而在6例慢性粒细胞性白血病(CML)中不表达,在慢性淋巴细胞性白血病(CLL)中阳性率(3/5)与B系ALL病例中的阳性率(9/28)差异无显著意义(P=0.2389)。2D3在ALL各免疫亚型中的表达差异无显著意义(P=0.5632);在AML各亚型中除2例AML—M6患者不表达外,其余AML亚型间无统计学意义(P〉0.05)。结论:单抗2D3主要与AML细胞反应,但在识别白血病细胞分化阶段上未发现特殊性。 相似文献
10.
The preweaning piglet has been found to be a valuable research model for testing ingredients used in infant formula. As part of the safety assessment, the neonates' immune system is an important component that has to be evaluated. In this study three concurrent strategies were developed to assess immune system status. The methods included (1) immunophenotying to assess circulating innate immune cell populations, (2) monitoring of circulating cytokines, particularly in response to a positive control agent, and (3) monitoring of localized gastrointestinal tissue cytokines using immunohistochemistry (IHC), particularly in response to a positive control agent. All assays were validated using white papers and regulatory guidance within a GLP environment. To validate the assays precision, accuracy and sample stability were evaluated as needed using a fit for purpose approach. In addition animals were treated with proinflammtory substances to detect a positive versus negative signal. In conclusion, these three methods were confirmed to be robust assays to evaluate the immune system and GIT-specific immune responses of preweaning piglets. 相似文献