Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 646
Filter
1.
Hematol., Transfus. Cell Ther. (Impr.) ; 44(1): 49-55, Jan.-Mar. 2022. tab, graf
Article in English | LILACS | ID: biblio-1364889

ABSTRACT

Abstract Background This study aims to validate the single-platform method for enumeration of CD34+ cells, by comparing the performance of two different commercial kits, as well as to evaluate the efficiency of the AccuriTM C6 cytometer in providing direct counts of absolute cell numbers. Method We evaluated 20 samples from umbilical cord blood (UCB), comparing the two different methodologies for enumeration of CD34+ cells: single and dual-platform. For the assessment of the single-platform, Procount and SCE kits were used, both of which use fluorescent beads as a counting reference to obtain absolute CD34+ cells numbers. Moreover, after the acquisition of samples in flow cytometer AccuriTM C6, following the protocol established for each kit, the number of CD34+ cells was recalculated, considering the cell count provided by the AccuriTM C6. Main Results In our analysis, the results showed a strong correlation between the number of CD34+ cells/μL (r2 = 0.77) when comparing the SCE kit and the current dual-platform method. On the other hand, the comparison between Procount kit and dual-platform results showed a moderate correlation for the number of CD34+/μL cells (r2 = 0.64). Conclusion Our results showed that the AccuriTM C6 flow cytometer can be used safely, applying both the dual and single platform analysis strategy. Considering the ISHAGE protocol-based single-platform approach, as the most appropriate methodology for CD34+ cells enumeration, our results demonstrated that the SCE kit has great potential for national standardization of UCB samples analysis methodology.


Subject(s)
Hematopoietic Stem Cells , Antigens, CD34 , Fetal Blood , Transplantation, Homologous , Protocols , Flow Cytometry
2.
Article in Chinese | WPRIM | ID: wpr-880174

ABSTRACT

OBJECTIVE@#To retrospectively analyze the efficacy and safety of pegylated recombinant human granulocyte colony-stimulating factor (PEG-rhG-CSF) in hematopoietic stem cell mobilization in 71 normal healthy donors for allogeneic hematopoietic stem cell transplantation (allo-HSCT).@*METHODS@#From March 2018 to July 2019, 71 patients received allo-HSCT in The General Hospital of Western Theater Command were enrolled in the study, a single dose of PEG-rhG-CSF was injected subcutaneously at 12 mg to all the stem cell donors. After injection for 4 days, CD34@*RESULTS@#Seventy-one healthy stem cell donors included 39 males and 32 females with a median age of 38 (16-58) years old. The median number of CD34@*CONCLUSION@#For allo-HSCT donor mobilization, PEG-rh-G-CSF is effective, safe, and convenient, providing more options for HSC mobilization.


Subject(s)
Adult , Antigens, CD34 , Female , Graft vs Host Disease , Granulocyte Colony-Stimulating Factor , Hematopoietic Stem Cell Mobilization , Hematopoietic Stem Cell Transplantation , Humans , Male , Middle Aged , Recombinant Proteins , Retrospective Studies
3.
Article in Chinese | WPRIM | ID: wpr-880155

ABSTRACT

OBJECTIVE@#To investigate the quantitative expression of immunophenotype of CD34@*METHODS@#Multi-parameter flow cytometry (FCM) was used to detect the proportion and mean fluorescence intensity (MFI) of each antigen of bone marrow CD34@*RESULTS@#Bone marrow blast cell proportion (P<0.01), RBC level (P<0.01), and Hb level (P<0.05) of high-risk MDS patients were higher, while EPO level (P<0.05) was lower than those of low-risk patients. The proportion of CD34@*CONCLUSION@#The immunophenotype of CD34


Subject(s)
Antigens, CD34 , Bone Marrow , Bone Marrow Cells , Flow Cytometry , Humans , Immunophenotyping , Myelodysplastic Syndromes
4.
Article in Chinese | WPRIM | ID: wpr-880029

ABSTRACT

OBJECTIVE@#To investigate the predict significance of the high aldehyde dehydrogenase activity (ALDH@*METHODS@#Bone marrow samples of 23 t(8;21) AML patients diagnosis and achieved complete remission in our hospital from April 2015 to June 2016 were collected, then flow cytometry method was used to detect the activity of ALDH, relationship between it and relapse was analyzed.@*RESULTS@#All the patients were followed up for a median of 32 (2-52) months. The median percentage of CD34@*CONCLUSION@#The percentage of CD34


Subject(s)
ADP-ribosyl Cyclase 1 , Antigens, CD34 , Flow Cytometry , Humans , Leukemia, Myeloid, Acute , Neoplastic Stem Cells , Prognosis , Recurrence , Remission Induction
5.
Article in Chinese | WPRIM | ID: wpr-879807

ABSTRACT

OBJECTIVE@#To study the association of different maternal and infant factors with the number of total nucleated cells and CD34@*METHODS@#A prospective study was performed for the umbilical cord blood samples of 130 neonates who were born in Dalian Women and Children's Medical Center from June 2019 to January 2020, with a male/female ratio of 1:1. Related perinatal information was collected, including maternal age and blood type, presence or absence of gestational diabetes or gestational hypertension, pregnancy method, mode of delivery, singleton pregnancy/twin pregnancy, body weight and sex of neonates, Apgar score after birth, and the conditions of placenta, amniotic fluid, and umbilical cord.@*RESULTS@#The neonates were grouped according to maternal blood type, gestational diabetes, gestational hypertension, pregnancy method, mode of delivery, singleton pregnancy/ twin pregnancy, sex of neonates, Apgar score after birth, placental morphology, meconium staining of amniotic fluid, and umbilical cord around the neck. The comparison between groups showed no significant differences in the numbers of total nucleated cells and CD34@*CONCLUSIONS@#The number of CD34


Subject(s)
Antigens, CD34 , Female , Fetal Blood , Hematopoietic Stem Cell Transplantation , Hematopoietic Stem Cells , Humans , Infant , Infant, Newborn , Male , Pregnancy , Prospective Studies , Umbilical Cord
6.
Hematol., Transfus. Cell Ther. (Impr.) ; 42(1): 70-76, Jan.-Mar. 2020. tab, ilus
Article in English | LILACS | ID: biblio-1090469

ABSTRACT

Abstract Inflammation and angiogenesis are linked to the development of cancer since both can support the establishment of a tumor-prone microenvironment. The CCR5 is a major regulatory molecule involved in inflammation. The CD34 molecule is commonly described as a hematopoietic stem cell marker, and CD34+ cells are involved in the regulation of distinct physiological processes, including angiogenesis. CCR5 participates in the development of various types of cancer, and recently, a reduced CCR5 expression was associated with low CD34+ cell counts in human cord blood. A naturally occurring genetic variant of the CCR5 gene, the so-called CCR5Δ32 polymorphism, consists of a 32 base-pair deletion in the DNA, interfering in the CCR5 protein levels on the cell surface. When in homozygosis, this variant leads to a total absence of CCR5 expression on the cell surface. In heterozygous individuals, CCR5 surface levels are reduced. Based on these key findings, we hypothesize that a functional interaction can connect CCR5 and CD34 molecules (giving rise to a "CCR5-CD34 axis"). According to this, a CCR5-CD34 interaction can potentially support the development of different types of cancer. Consequently, the lack of CCR5 in association with reduced CD34+ cell counts could indicate a protective factor against the development of cancer. It is required to characterize in detail the functional relationship between CCR5 and CD34 proteins, as well as the real influence of both molecules on the susceptibility and development of cancer at population level. If our hypothesis is confirmed, the CCR5-CD34 axis may be a potential target in the development of anti-cancer therapies.


Subject(s)
Antigens, CD34 , Receptors, CCR5 , Angiogenesis Inducing Agents , Carcinogenesis , Inflammation , Neoplasms
7.
J. coloproctol. (Rio J., Impr.) ; 40(1): 12-19, Jan.-Mar. 2020. tab, graf, ilus
Article in English | LILACS | ID: biblio-1090846

ABSTRACT

Abstract Background This study defines the disease profile in south Indian population and determine the clinic-pathological aspects of Gastro-Intestinal Stromal Tumors. Method In this prospective study patients diagnosed of gastrointestinal stromal tumors were taken thorough clinical examination and a database of Anthropometric details and clinical details were analyzed. Pathological data included tumor size, presence or absence necrosis, mitotic counts, immunohistochemistry for CD-117, CD-34. Results There were 44 patients with confirmed diagnosis of gastro-intestinal stromal tumor. The highest incidence was found in the 6th decade. The most common symptoms were abdominal pain and gastrointestinal bleed. Stomach was most frequent site for gastro-intestinal stromal tumors. Immunochemistry for CD-117 was positive in 93.18% cases. Majority of tumors (79.5%) had pure spindle cell morphology and mitotic activity showed that 34% of the GISTs were of the high risk group. Forty two patients were suggestive of surgery as the primary treatment after presentation. Conclusion Abdominal pain was the most common presenting complaint. Majority of the tumors aroused from the stomach. The majority of the tumors had pure spindle cell morphology and 93% of the tumors were CD-117 positive. A significant relationship between tumor size, tumor necrosis and mitotic activity with large tumors having necrosis and high mitotic rate having high risk of malignancy, was observed. Surgical resection is considered mainstay of treatment of gastro-intestinal stromal tumor. Imatinib therapy should be given to patients in moderate to severe risk categories.


Resumo Justificativa Este estudo define o perfil da doença na população do sul da Índia e determina os aspectos clínicos e patológicos dos tumores estromais gastrointestinais. Método Neste estudo prospectivo, os pacientes diagnosticados com tumor estromal gastrointestinl foram submetidos a um exame clínico completo, e uma série de dados dos pacientes, incluindo detalhes antropométricos e clínicos, foram analisados. Os dados patológicos incluíram tamanho do tumor, presença ou ausência de necrose, contagem mitótica e imuno-histoquímica para CD-117, CD-34. Resultados Havia 44 pacientes com diagnóstico confirmado de tumor estromal gastrointestinal. A maior incidência foi encontrada na 6ª década de vida. Os sintomas mais comuns foram dor abdominal e sangramento gastrointestinal. O estômago foi o local mais frequente para tumores estromais gastrointestinais. A imuno-histoquímica para CD-117 foi positiva em 93,18% dos casos. A maioria dos tumores (79,5%) apresentava morfologia pura de células fusiformes e a atividade mitótica mostrou que 34% dos GISTs pertenciam ao grupo de alto risco. Quarenta e dois pacientes receberam indicação para cirurgia como tratamento primário após a apresentação. Conclusão A dor abdominal foi a queixa mais comum. A maioria dos tumores afetava o estômago, apresentava morfologia pura de células fusiformes e 93% eram CD-117 positivos. Foi observada uma relação significativa entre o tamanho do tumor, a necrose tumoral e a atividade mitótica, com os tumores grandes apresentando necrose e alta taxa mitótica com alto risco de malignidade. A ressecção cirúrgica é considerada o principal tratamento do tumor estromal gastrointestinal. A terapia com imatinibe deve ser administrada a pacientes em categoria de risco de moderadas a grave.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Young Adult , Gastrointestinal Stromal Tumors/pathology , Gastrointestinal Neoplasms , Proto-Oncogene Proteins c-kit/immunology , Antigens, CD34/immunology , Imatinib Mesylate/therapeutic use , India , Antineoplastic Agents/therapeutic use
8.
An. Facultad Med. (Univ. Repúb. Urug., En línea) ; 6(2): 25-34, dic. 2019. ilus, graf
Article in Spanish | LILACS, BNUY, UY-BNMED | ID: biblio-1291263

ABSTRACT

El estudio de la megacariopoyesis humana se ha visto obstaculizado por la relativa escasez de megacariocitos en la médula ósea (0,05-0,2 % de las células medulares), lo que ha llevado a la optimización de protocolos de expansión in vitro a partir de precursores de diversos orígenes (cordón umbilical, médula ósea y sangre periférica con o sin movilización previa). Los cultivos celulares a partir de precursores han permitido la producción y el estudio tanto de megacariocitos así como de proplaquetas y plaquetas Sin embargo, la producción in vitro óptima de megacariocitos que culminen todos los estadios de diferenciación es un reto aún no resuelto. En este trabajo reportamos los hallazgos concernientes a la determinación de las condiciones y concentraciones de trombopoyetina para lograr una óptima relación entre la cantidad de trombopoyetina empleada y el porcentaje y grado de diferenciación megacariocítica en muestras obtenidas de cinco donantes alogénicos aceptados para trasplante de médula ósea.


The study of human megakaryocytopoiesis has been hampered by the relative scarcity of megakaryocytes in bone marrow (0.05-0.2 % of medullary cells), which has led to the optimization of protocols of in vitro expansion of precursors from diverse sources (umbilical cord, bone marrow and peripheral blood with or without previous mobilization). Cell cultures from different precursors have allowed the production and study of megakaryocytes as well as proplatelets and platelets. However, the in vitro production of megakaryocytes that culminate all stages of differentiation is a challenge that has not yet been resolved. In this work we report the findings related to the determination of thrombopoietin treatment conditions and concentrations to achieve an optimal relationship between the amount of thrombopoietin and the percentage and degree of megakaryocytic differentiation in five allogeneic donors that were accepted for bone marrow transplantation.


O estudo da megacariopoiese humana tem sido dificultado pela relativa escassez de megacariócitos na medula óssea (0,05-0,2 % das células medulares), o que levou à otimização dos protocolos de expansão in vitro a partir de precursores de diversas origens (cordão umbilical, medula óssea e sangue periférico com ou sem mobilização prévia). Culturas de células a partir de precursores permitiram a produção e o estudo tanto de megacariócitos e de proplaquetas e plaquetas. No entanto, a produção ótima in vitro de megacariócitos que culminam em todas as fases de diferenciação é um desafio ainda não resolvido. Neste trabalho, relatamos as descobertas relativas à determinação das condições e concentrações de trombopoietina para obter uma relação ótima entre a quantidade de trombopoietina usada e a taxa e o grau de diferenciação megacariocítica em amostras obtidas de cinco doadores alogênicos aceitos para transplante de medula óssea.


Subject(s)
Humans , Thrombopoietin/analysis , Megakaryocytes/cytology , Antigens, CD34/analysis , Cells, Cultured/cytology , Leukapheresis , Protocols , Platelet Membrane Glycoprotein IIb/analysis , Integrin beta3/analysis , Culture Techniques/methods
9.
Journal of Experimental Hematology ; (6): 1761-1766, 2019.
Article in Chinese | WPRIM | ID: wpr-781400

ABSTRACT

OBJECTIVE@#To investigate the apoptosis of CD34CD38-KG1a leukemia stem cells induced by Qinba selenium-mushroom extract(FA-2-b-β), and its related mechanism.@*METHODS@#CD34CD38--KG1a cells were isolated from KG1a cell line by magnetic activated cell sorting. The proliferation ability of KG1a stem cells treatd by various concentration of FA-2-b-β(1.2-2.4 mg/ml) in vitro for 24 and 48 hours were tested by cell counting Kit-8(CCK8). Flow cytometry was used to detect the apoptosis rate of KG1a stem cells in each group after treated by FA-2-b-β in vitro. Expression of BAX,BCL-2,Casepase-3 and Cyclin D1 protein were detected by Western blot.@*RESULTS@#The proportion of CD34CD38--KG1a stem cells was (95.35±2.63)% after immunomagnetic isolation. The proliferation of KG1a stem cells was inhibited significantly by FA-2-b-β, which shows a time- and dose-dependent manner (24 h,r=0.943; 48 h,r=0.976). Flow cytometry shows that with the increasing of drug concentration, the apoptosis was also increased, when KG1a stem cells was treated by FA-2-b-β for 24 h. Western blot indicated that the expression of apoptosis-related protein BAX and Casepase-3 were up-regulated, the expression of BCL-2 and Cyclin D1 were down-regulated.@*CONCLUSION@#FA-2-b-β can regulate proliferation and apoptosis KG1a stem cells, the involved mechanism may be related with the activation of mitochondrial-mediated apoptotic pathway.


Subject(s)
ADP-ribosyl Cyclase 1 , Antigens, CD34 , Apoptosis , Cell Line, Tumor , Cell Proliferation , Humans , Membrane Glycoproteins , Neoplastic Stem Cells , Selenium
10.
Article in Chinese | WPRIM | ID: wpr-771915

ABSTRACT

OBJECTIVE@#To screen the antioxidant small molecular compounds with optimal efficiency of expansing the human hematopoietic stem cells (hHSC) In vitro based on antioxidant small molecular compound database of LKT laboratory, and to verify the effects of these compounds on the biological functions of hHSC.@*METHODS@#The umbilial cord blood CD34 cells were enriched by using the MACS beads; the absolute number and percentage of CD34 cells and CD34 CD49f cells were detected by high throughput flow cytometry after culture of hHSC with compounds in vitro for 1 week, the SR1 (1 μmol/L) was used as positive control, the candidate compounds were screened out; then 4 compounds were selected for follow-up experiments by comprehensive evaluation of concentration, safety and expansion efficacy, the optimal used concentrations of selected compounds were determined through the concentration gradient analysis, and CFC short-term colony-forming cell test was performed by using the determined concentration so as to verify the effect of compounds on the self-renewal, multilineage differentiation.@*RESULTS@#Out of 85 antioxidant small molecular compounds, 4 compounds (C2968, D3331, B1753 and B3358) with obvious expansion efficacy for CD34 cells and CD34 CD49f cells were screened out by high throughput flow cytometry; their optimal concentrations of 4 compounds were 0.5 μmol/L for C2968, 1.5 μmol/L for D3331 and 1.5 μmol/L for B1753 and 15 μmol/L for B3358. The CFC assay showed the colony formation number in compound-treated group significantly increased as compared with control group, moreover the self-renewal and multilineage differentiation were maintained.@*CONCLUSION@#The antioxidant small molecular compounds C2968 (0.5 μmol/L), D3331 (1.5 μmol/L), B1753 (1.5 μmol/L) and B3358 (1.5 μmol/L) possess good expansion efficacy for hHSC, they can maintain hHSC self-renewal, at the same time ensure the multilineage differentiation potentiality of hHSC.


Subject(s)
Antigens, CD34 , Antioxidants , Cells, Cultured , Fetal Blood , Flow Cytometry , Hematopoietic Stem Cells , Humans
11.
Article in Chinese | WPRIM | ID: wpr-771858

ABSTRACT

OBJECTIVE@#To compare the efficacy of directional erythroid differentiation in different serum free culture systems and to screen the optimal culture systems for inducing the differentiation of umbilical cord blood hematopoietic stem and progenior cells (HSPC) to erythroid cells.@*METHODS@#The CD34 cells from umbilical blood munonuclear cells were sorted by using the magnetic beads, and were inoculated into 3 different of culture systems (system 1, 2 and 3 respectively), to induce erythrold differentiation by 3 stage culture. The living cells were counted in different differentiation stages and were observed by Wright-Giemsa staining; the expression of CD71 and CD235a on cell surface was detected by flow cytometry, the erythroid differentiation pteency was detected via colony-forming test.@*RESULTS@#The ability of system 2 to promote the HSPC proliferation was the strongest, the efficacy of system 3 to promote the erythroid differentiation of HSPC was the most optimal; the proliferation ability of cells cultured in system 2 for 2-15 days all was higher than that of cells cutured in system 1 and 3 (P<0.05). The flow cytometry detection showed that the expression of CD71 and CD235a on surface of cells cultured in system 3 was the highest, the CD235a percentage on day 15 of differentiation in system 3 was (92.33±3.89)%, that in system 2 was (84.67±3.12)%, while that in system 1 was (72.17±6.83)% (P<0.05). Cell morplologic detection showed that throid differentiation was accelerated on day 12, the percentage of orthochromatic erythrocytes in system 3 was (67.67±2.08)% which was 10.69 and 25.34 times higher than that in system 2 and 1 respectively (P<0.05). The colony-forming test showed the ratio of BFU-E in system 3 increased gradually on day 3-9 (r=0.99, P<0.05), which was significanlly higher than that in system 2 and 1 on day 9 (90.35±5.52% vs 77.06±2.26% and 74.50±3.95%).@*CONCLUSION@#Culture system 3 is the most effective serum-free erythroid differentiation system, and the culture system 2 is the most powerful HSPC proliferation system. This study results provide a technical basis for further efficiently increasing and inducing the erythroid proliferation and differentiation of HSPC, and also provide culture system in vitro for the clinical application and basic research.


Subject(s)
Antigens, CD34 , Cell Differentiation , Cells, Cultured , Culture Media, Serum-Free , Erythroid Precursor Cells , Fetal Blood , Humans
12.
Article in Chinese | WPRIM | ID: wpr-776002

ABSTRACT

To study the clinicopathologic characteristics,immunohistochemical features,differential diagnosis,and prognosis of solitary fibrous tumours(SFT)/hemangiopericytomas(HPC)in the maters(meninx). Methods A series of 7 cases previously diagnosed as SFT/HPC at the Department of Pathology,Peking Union Medical College Hospital,during the period from 2008 to 2018 were analyzed for clinical data,histopathology,and immunohistochemical findings.The patients were followed up and the relevant literatures were reviewed. Results These seven patients included two males and 5 females aged 22 to 77 years(mean,49 years).Headache was the most common symptom.The magnetic resonance imaging of SFT/HPC showed irregularly contoured masses and dural tail sign was observed at the periphery of the lesion in 4 cases.The major axis of the tumor ranged from 1.8 cm to 10 cm(mean,4 cm).The tumors were located in the mater in 6 cases and in the spinal meninx in 1 case.The tumors were surgically removed in all cases.Under light microscope,the tumors were formed by long round,oval or spindle cells,with rich branching vascular pattern and varying quantity of collagenous fibers bands in both sparse areas and dense areas.According the WHO classification,2 cases were in WHO grade Ⅰ,2 cases in WHO grade Ⅱ,and 3 cases in WHO grade Ⅲ.Immunohistochemistry of the paraffin-embedded tissues in all cases showed positive immunoreativity for CD34 and vimentin in all seven cases,along with positive signal transducer and activator of transcription 6 in 4 cases,negative epithelial membrane antigen and S-100 in 7 cases,and negative progestational hormone and somatostatin receptor 2 in 6 cases.The Ki-67 index ranged from 1% to 15%.Five patients with follow-up data(including 1 current case)were alive,while 2 patients were lost to follow-up. Conclusions The SFT/HPC are rare in the maters(meninx)and is clinically difficult to be differentiated from other meningioma.The combination of CD34 and signal transducer and activator of transcription 6 helps to diagnose this disease.


Subject(s)
Adult , Aged , Antigens, CD34 , Metabolism , Diagnosis, Differential , Female , Hemangiopericytoma , Diagnosis , Pathology , Humans , Immunohistochemistry , Male , Meninges , Pathology , Middle Aged , Prognosis , STAT6 Transcription Factor , Metabolism , Solitary Fibrous Tumors , Diagnosis , Pathology , Young Adult
13.
Hematol., Transfus. Cell Ther. (Impr.) ; 40(3): 213-218, July-Sept. 2018. tab, graf, ilus
Article in English | LILACS | ID: biblio-953842

ABSTRACT

ABSTRACT Background: Due to laboratory logistic issues, our center has traditionally scheduled peripheral blood stem cell harvests based on timing from the start of mobilization. This has proved to be useful in some cases, but also resulted in many fruitless harvests due to poor mobilization. In order to improve the efficiency of collections and compare the effectiveness of peripheral blood CD34+ cells as a predictor with data from other reports, this study analyzed the implementation of this routine. Methods: Peripheral blood and leukapheresis samples were quantified by flow cytometry and the association between these parameters was assessed. Results: Sixty-six consecutive leukapheresis samples were collected from 34 patients after the collection of peripheral blood samples for CD34+ quantification. A moderate positive correlation was observed between peripheral blood CD34+ cell count and total CD34+ cell count/kg (r = 0.596; p-value < 0.001). A multivariable regression model also confirmed this association and allowed the estimation that for every increase in five CD34+ cells/µL in the peripheral blood, a mean increase of 0.38 × 106 CD34+ cells/kg could be predicted. Demographic characteristics, baseline comorbidities and mobilization regimen did not influence final CD34+ cell count in this sample. Conclusions: As observed in other centers, quantification of peripheral blood CD34+ progenitor cells is a strong predictor of effectiveness to guide stem cell harvesting. Due to the results of this study, a modification in the peripheral blood stem cell harvesting logistics was implemented at our center in order to incorporate this routine.


Subject(s)
Humans , Male , Female , Stem Cells , Blood Component Removal , Antigens, CD34 , Flow Cytometry
14.
Article in Chinese | WPRIM | ID: wpr-774019

ABSTRACT

Objective To identify and verify the distribution of Telocytes derived from heterogeneous interstitial cells in the vital organs of ApoE mice.Methods Heart,kidney,and liver tissues were harvested from ApoE adult mice. Immunohistochemical assays were performed by using different immunobiological markers.Results Telocytes were found in these vital organs. The expressions of immunobiological markers differed among different organs. CD34,CD117,and CD28 were positively expressed in Telocytes in cardiac tissue;CD117 and plateled-derived growth factor-Α were negatively expressed in Telocytes in renal tissue;and CD117 and plateled-derived growth factor receptor-Α had negative expression in Telocytes in hepatic tissue. Furthermore,the distribution of Telocytes also differed in the same organ.Conclusions Telocytes exist in the vital organs of ApoE mice,as demonstrated by immunohistochemisty assay. The expressions of immunobiological markers differ among Telocytes in different organs.


Subject(s)
Animals , Antigens, CD34 , Metabolism , CD28 Antigens , Metabolism , Kidney , Cell Biology , Liver , Cell Biology , Mice , Mice, Knockout, ApoE , Myocardium , Cell Biology , Proto-Oncogene Proteins c-kit , Metabolism , Telocytes , Cell Biology
15.
Article in English | WPRIM | ID: wpr-775183

ABSTRACT

BACKGROUND@#Hepatocyte growth factor (HGF) may act as a possible biochemical index for vascular damage, although evidence for the association between HGF and carotid intima-media thickness (CIMT) is limited. Since both HGF and circulating CD34-positive cells play an important role in endothelial repair, circulating CD34-positive cell levels may influence the association between HGF and CIMT.@*METHODS@#We conducted a cross-sectional study of 269 elderly Japanese men aged 60-69 years who had undertaken an annual medical checkup from 2014 to 2015.@*RESULTS@#The median value for circulating CD34-positive cells was 0.93 cells/μL. Among the study population, 135 men showed low circulating CD34-positive cell levels (≤ 0.93 cells/μL). By multivariable linear regression analysis, HGF was found to be significantly positively associated with CIMT only to participants with low circulating CD34-positive cell levels, with a multi-adjusted β of 0.26 (p = 0.005) and 0.002 (0.986) for low and high circulating CD34-positive cell levels, respectively. In addition, a significant interaction was observed between HGF and circulating CD34-positive cell levels (low and high) on CIMT (multivariable p value of 0.049). A positive association exists between HGF and CIMT in elderly Japanese men, limited to participants with low circulating CD34-positive cell levels.@*CONCLUSION@#A positive association exists between HGF and CIMT in community-dwelling elderly Japanese men, which is limited to participants with low numbers of circulating CD34-positive cells. Our findings indicate that circulating CD34-positive cell levels could determine the influence of HGF on CIMT in elderly Japanese men.


Subject(s)
Aged , Antigens, CD34 , Blood , Biomarkers , Blood , Carotid Intima-Media Thickness , Cross-Sectional Studies , Hepatocyte Growth Factor , Metabolism , Humans , Japan , Male , Middle Aged
16.
Article in Chinese | WPRIM | ID: wpr-813190

ABSTRACT

We reported a case of giant solitary fibrous tumor of vagina and reviewed literature. The clinical features, diagnosis, and treatment schemes for the disease were summarized to improve the understanding of the disease. An elder female patient came to the Third Xiangya Hospital, Central South University, because of abdominal distention and pain for 5 days after menopause for 9 years. The patient was diagnosed as a solitary fibrous tumor of vagina by pathology and immunohistochemistry after complete resection. The tumor size of the patient was the largest according to reported literature, and the tumor recurred 10 months after surgery. The strong positive expression of CD34 and high Ki-67 proliferation index in tumor immunohistochemistry indicate that the prognosis of patients will be poor.


Subject(s)
Aged , Antigens, CD34 , Metabolism , Biomarkers, Tumor , Metabolism , Female , Humans , Immunohistochemistry , Ki-67 Antigen , Metabolism , Neoplasm Recurrence, Local , Metabolism , Prognosis , Solitary Fibrous Tumors , Metabolism , Pathology , Tumor Burden , Vaginal Neoplasms , Metabolism , Pathology
17.
Journal of Experimental Hematology ; (6): 1772-1779, 2018.
Article in Chinese | WPRIM | ID: wpr-774387

ABSTRACT

OBJECTIVE@#To explore the maintaining measures for the vitality of hematopoietic stem cells (HSC) in vitro, so as provide technical support for ultra long distance transport of HSC collected from unrelated donors.@*METHODS@#Peripheral blood hematopoietic stem cells (PBHSC) were treated by different methods according to various groups, then stored at 4 ℃ in the refrigerator. The percentage of CD34 cells, relative cell activity, relative cell proliferation rate, relative colony-forming rate, oxygen fraction and intracellular reactive oxygen species (ROS) were detected at 0, 24, 48 and 72 h after storage of PBHSC respectively.@*RESULTS@#The percentage of CD34 cells during 72 h storage did not altered. Along with the prolonging of storage time, the relative cell activity, relative cell proliferation rate and relative colony-forming rate gradually decreased in untreated PBHSC(control group), the related coefficients were -0.796, -0.883 and -0.815 respectively. Plasma dilution, antioxidants and oxygenation could improve the relative cell activity and relative cell proliferation rate, but oxygenation could decrease the relative colony-forming rate of PBHSC. The combination of 2 or 3 factors showed stronger protection effects on PBHSC. The intracellular level of ROS decreased gradually with the prolonging of storage time. Oxygenation of PBHSC could increase oxygen fraction, and also increase the intracellular level of ROS at the same time. The addition of antioxidants could reduce the level of ROS.@*CONCLUSION@#The percentage of CD34 cells can not serve as the indicator of PBHSC vitality. Plasma dilution, oxygenation and antioxidants can increase the survival and viability of PBHSC, but oxygenation can increase the intracellular ROS level and impair colony-forming ability of PBHSC. The combination of multiple factors can maintain the vitality of PBHSC better.


Subject(s)
Antigens, CD34 , Antioxidants , Hematopoietic Stem Cells , Reactive Oxygen Species
18.
National Journal of Andrology ; (12): 387-392, 2018.
Article in Chinese | WPRIM | ID: wpr-689746

ABSTRACT

<p><b>Objective</b>To investigate the effect of finasteride on the microvascular density (MVD) and the expression of the vascular endothelial growth factor (VEGF) in the seminal vesicle of rats.</p><p><b>METHODS</b>Forty male SD rats were randomly and equally divided into groups A, B, C and D, those in groups A and B fed with normal saline as the control and those in C and D with finasteride at 40 mg per kg of the body weight per day, A and C for 14 days and B and D for 28 days. Then the seminal vesicles of the animals were harvested for HE staining, measurement of MVD, determination of the expressions of CD34 and VEGF by immunohistochemistry, and observation of histomorphological changes in the seminal vesicle.</p><p><b>RESULTS</b>The expressions of CD34 in groups C and D were decreased by 6.7% and 15.8% as compared with those in A and B (P<0.01), and that in group D decreased by 9.3% in comparison with that in C (P<0.01). The expression indexes of VEGF in groups C and D were decreased by 6.9% and 14.1% as compared with those in A and B (P<0.01), and that in group D decreased by 9.0% in comparison with that in C (P<0.01).</p><p><b>CONCLUSIONS</b>Finasteride can inhibit the expression of VEGF in the seminal vesicle tissue of the rat and hence suppress the angiogenesis of microvessels of the seminal vesicle.</p>


Subject(s)
Angiogenesis Inhibitors , Pharmacology , Animals , Antigens, CD34 , Metabolism , Finasteride , Pharmacology , Immunohistochemistry , Male , Neovascularization, Physiologic , Random Allocation , Rats , Rats, Sprague-Dawley , Seminal Vesicles , Metabolism , Vascular Endothelial Growth Factor A , Metabolism
19.
Article in Chinese | WPRIM | ID: wpr-689571

ABSTRACT

<p><b>OBJECTIVE</b>To analyze the success rate and influencing factors for collecting peripheral blood hematopoietic stem cells (HSC) by combination of cyclophosphamide (CTX) or E-CHOP chemotherapy combined with granulocyte colony stimulating factor (G-CSF) in patients with multiple myeloma.</p><p><b>METHODS</b>The clinical data of 75 patients with multiple myeloma in our hospital were retrospectively analyzed. All patients received CTX or E-CHOP chemotherapy combined with G-CSF mobilization to collect HSC, and the success rate (CD34 cell numbers was at least 2×10/kg) and its influencing factors were statistically analyzed.</p><p><b>RESULTS</b>A total of 86 collections by mobilization were performed in 75 patients, with the average 3.22 (0.12-22.28)×10/kg of CD34 cells, and the success rate of 74.42%. Single factor analysis revealed that the course number of chemotherapy and disease status before the collection significantly correlated with the success rate of HSC collection (P<0.05), and sex, age, disease type, ISS stage and mobilization method showed no significant correlation with the collection success rate (P>0.05). Multivariate Logistic regression analysis showed that the course number of chemotherapy positively related with the success rate of HSC collection (OR=2.95, 95% CI: 1.60-5.41, P<0.01), and there was no significant correlation with the disease status before collection (OR=1.01, 95% CI: 0.88-1.16, P=0.89).</p><p><b>CONCLUSION</b>There are no significant effects of sex, disease type, ISS staging and mobilization methods on the success rate of HSC collection in patients with multiple myeloma, and the less course number of chemotherapy (<5) before collection show a higher success rate of HSC collection.</p>


Subject(s)
Antigens, CD34 , Cyclophosphamide , Granulocyte Colony-Stimulating Factor , Hematopoietic Stem Cell Mobilization , Hematopoietic Stem Cell Transplantation , Hematopoietic Stem Cells , Humans , Multiple Myeloma , Retrospective Studies
20.
Article in Chinese | WPRIM | ID: wpr-689565

ABSTRACT

<p><b>OBJECTIVE</b>To explore the expression level of insulin-like growth facter (IGF-IR) in CD34 cells of patients with myelodysplastic syndromes(MDS).</p><p><b>METHODS</b>Flow cytometry was used to detect the expression of IGF-IR in the CD34 cells of 100 MDS patients and 18 normal controls.</p><p><b>RESULTS</b>The average IGF-IR expression level in the CD34 cells of 100 MDS patients (41.0±28.1)% was statistically and significantly elevated in comparison with the corresponding level in normal controls(4.3±1.8)%,(P<0.0001). The average expression level of 22 cases in high-risk groups was very significantly increased, compared with that in 78 cases of low-risk groups[(66.5±27.8)% vs (34.5%±24.9)%](P<0.0001), and the average expression level in 23 patients with chromosome abnormality was very significantly increased in comparison with that in rest 77 patients [(56.0±30.9)% vs (36.9%±26.2)%](P<0.01).</p><p><b>CONCLUSION</b>The over-expression of IGF-IR in CD34 cells of MDS patients suggests that the IGF-IR may involve in the origin, occurrence and progress. The average IGF-IR expression level is markedly elevated in high-risk groups and the patients who showed chromosome abnormality, this trend revealed that IGF-IR correlates with malignant clonal proliferation in MDS patients, thus providing a basis for their prognosis and outcome evaluation.</p>


Subject(s)
Antigens, CD34 , Bone Marrow Cells , Chromosome Aberrations , Flow Cytometry , Humans , Myelodysplastic Syndromes , Somatomedins
SELECTION OF CITATIONS
SEARCH DETAIL