LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 6 of total 6

Search options

  1. Article: Colorectal cancer in patients seen at the teaching hospitals of Guadeloupe and Martinique: discrepancies, similarities in clinicopathological features, and p53 status.

    Decastel, Monique / Ossondo, Marlene / Andrea, Anne-Marie / Tressieres, Benoît / Veronique-Baudin, Jacqueline / Deloumeaux, Jacqueline / Lubeth, Marc / Smith-Ravin, Juliette

    BMC clinical pathology

    2014  Volume 14, Issue 1, Page(s) 12

    Abstract: Background: In Guadeloupe and Martinique, two French Overseas Departments, colorectal cancer (CRC) has become an essential public health issue. However, little is known about CRC characteristics and the p53 status in these populations, particularly in ... ...

    Abstract Background: In Guadeloupe and Martinique, two French Overseas Departments, colorectal cancer (CRC) has become an essential public health issue. However, little is known about CRC characteristics and the p53 status in these populations, particularly in Guadeloupe, whereas certification of a cancer registry has been recently validated.
    Methods: This was a descriptive retrospective study of 201 patients who, between 1995 and 2000, underwent surgery for CRC in the Guadeloupe Teaching Hospital (GlpeTH; 83 patients) and in the Martinique Teaching Hospital (MqueTH; 118 patients). The clinicopathological features and the p53 expression, evaluated with immunohistochemistry, were compared at the time of diagnosis. A relationship between these parameters and the p53 expression was also studied. Data were analysed, using the SPSS computer software version 17.0.
    Results: No statistical difference was found between the two groups of patients regarding age (p = 0.60), percentage of young patients (≤50 years; p = 0.94)), sex (p = 0.47), histological type (p = 0.073) and tumour sites (p = 0.65), although the GlpeTH patients were diagnosed with more distal colon cancers (54.2%) than the Mque TH patients (47.4%). By contrast, a significant difference was found regarding the tumour grade (p < 0.0001), the pTNM stage (p = 0.045) and the pT stage (p < 0.0001). Regarding p53 expression, solely for the MqueTH patients, nuclear expression was associated with pTNM, the percentage of p53 negative tumours increasing with the progression of the pTNM stages (p = 0.029).
    Conclusions: For the first time, this study reveals discrepancies in clinicopathological features and in the p53 status between the two groups of patients. The GlpeTH patients were diagnosed with more moderated CRCs but with few CRCs at pTNM IV stage. By contrast, the MqueTH patients were diagnosed with more differentiated tumours, but with many more CRCs at pTNM IV stage. This paradox may be due to differences in tumour location (distal vs proximal), multiplicity of the genetic profiles of patients, or patients getting treatment elsewhere. Although our study is limited due to its small size, it emphasizes the originality of our results.
    Language English
    Publishing date 2014-03-29
    Publishing country England
    Document type Journal Article
    ISSN 1472-6890
    ISSN 1472-6890
    DOI 10.1186/1472-6890-14-12
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Effect of interleukin-8 and RANTES on the Gardos channel activity in sickle human red blood cells: role of the Duffy antigen receptor for chemokines.

    Durpès, Marie-Claude / Nebor, Danitza / du Mesnil, Pierre Couespel / Mougenel, Danièle / Decastel, Monique / Elion, Jacques / Hardy-Dessources, Marie-Dominique

    Blood cells, molecules & diseases

    2010  Volume 44, Issue 4, Page(s) 219–223

    Abstract: We investigated the effects of the chemokines IL-8 and RANTES on the activity of the Gardos channel (GC) of sickle red blood cells (SSRBCs). SSRBCs expressing the Duffy antigen receptor for chemokines (DARC) incubated under oxygenated conditions exhibit ... ...

    Abstract We investigated the effects of the chemokines IL-8 and RANTES on the activity of the Gardos channel (GC) of sickle red blood cells (SSRBCs). SSRBCs expressing the Duffy antigen receptor for chemokines (DARC) incubated under oxygenated conditions exhibit GC activation. The deoxygenation-stimulated K(+) loss via the GC is activated by the chemokines in the Duffy-positive SSRBCs. The percentage of cells with high density is 17 times higher in the Duffy-positive group. These findings are consistent with a greater susceptibility of Duffy-positive SSRBCs to inflammatory chemokines leading to GC activation and cellular dehydration and suggest a coupling, promoted by the sickling process, between DARC and the GC.
    MeSH term(s) Adult ; Anemia, Sickle Cell/blood ; Anemia, Sickle Cell/pathology ; Cell Shape ; Charybdotoxin/pharmacology ; Chemokine CCL5/pharmacology ; Dehydration ; Duffy Blood-Group System/genetics ; Duffy Blood-Group System/physiology ; Erythrocytes, Abnormal/cytology ; Erythrocytes, Abnormal/drug effects ; Humans ; Interleukin-8/pharmacology ; Intermediate-Conductance Calcium-Activated Potassium Channels/drug effects ; Ion Transport/drug effects ; Oxygen/pharmacology ; Potassium/metabolism ; Receptors, Cell Surface/physiology
    Chemical Substances ACKR1 protein, human ; Chemokine CCL5 ; Duffy Blood-Group System ; Interleukin-8 ; Intermediate-Conductance Calcium-Activated Potassium Channels ; KCNN4 protein, human ; Receptors, Cell Surface ; Charybdotoxin (115422-61-2) ; Potassium (RWP5GA015D) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2010-03-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1237083-6
    ISSN 1096-0961 ; 1079-9796
    ISSN (online) 1096-0961
    ISSN 1079-9796
    DOI 10.1016/j.bcmd.2010.02.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Activation state of alpha4beta1 integrin on sickle red blood cells is linked to the duffy antigen receptor for chemokines (DARC) expression.

    Durpès, Marie-Claude / Hardy-Dessources, Marie-Dominique / El Nemer, Wassim / Picot, Julien / Lemonne, Nathalie / Elion, Jacques / Decastel, Monique

    The Journal of biological chemistry

    2010  Volume 286, Issue 4, Page(s) 3057–3064

    Abstract: In sickle cell anemia, reticulocytes express enhanced levels of α4β1 integrin that interact mainly with vascular cell adhesion molecule-1 and fibronectin, promoting vaso-occlusion. These interactions are known to be highly sensitive to the inflammatory ... ...

    Abstract In sickle cell anemia, reticulocytes express enhanced levels of α4β1 integrin that interact mainly with vascular cell adhesion molecule-1 and fibronectin, promoting vaso-occlusion. These interactions are known to be highly sensitive to the inflammatory chemokine IL-8. The Duffy antigen receptor for chemokines (DARC) modulates the function of inflammatory processes. However, the link between α4β1 activation by chemokines and DARC erythroid expression is not or poorly explored. Therefore, the capacity of α4β1 to mediate Duffy-negative and Duffy-positive sickle reticulocyte (SRe) adhesion to immobilized vascular cell adhesion molecule-1 and fibronectin was evaluated. Using static adhesion assays, we found that, under basal conditions, Duffy-positive SRe adhesion was 2-fold higher than that of Duffy-negative SRes. Incubating the cells with IL-8 or RANTES (regulated on activation normal T cell expressed and secreted) increased Duffy-positive SRe adhesion only, whereas Mn(2+) increased cell adhesion independently of the Duffy phenotype. Flow cytometry analyses performed with anti-β1 and anti-α4 antibodies, including a conformation-sensitive one, in the presence or absence of IL-8, revealed that Duffy-positive and Duffy-negative SRes displayed similar erythroid α4β1 expression levels, but with distinct activation states. IL-8 did not affect α4β1 affinity in Duffy-positive SRes but induced its clustering as corroborated by immunofluorescence microscopy. Our results indicate that in Duffy-negative SRes α4β1 integrin is constitutively expressed in a low affinity state, whereas in Duffy-positive SRes α4β1 is expressed in a higher chemokine-sensitive affinity state. This activation state associated with DARC RBC expression may influence the intensity of the inflammatory responses encountered in sickle cell anemia and participate in its interindividual clinical expression variability.
    MeSH term(s) Adult ; Anemia, Sickle Cell/genetics ; Anemia, Sickle Cell/metabolism ; Anemia, Sickle Cell/pathology ; Cell Adhesion/drug effects ; Cell Adhesion/genetics ; Chemokine CCL5/metabolism ; Chemokine CCL5/pharmacology ; Duffy Blood-Group System/biosynthesis ; Duffy Blood-Group System/genetics ; Erythrocytes, Abnormal/metabolism ; Erythrocytes, Abnormal/pathology ; Female ; Gene Expression Regulation/drug effects ; Gene Expression Regulation/genetics ; Humans ; Integrin alpha4beta1/genetics ; Integrin alpha4beta1/metabolism ; Interleukin-8/metabolism ; Interleukin-8/pharmacology ; Male ; Manganese/metabolism ; Manganese/pharmacology ; Receptors, Cell Surface/biosynthesis ; Receptors, Cell Surface/genetics ; Reticulocytes/metabolism ; Reticulocytes/pathology
    Chemical Substances ACKR1 protein, human ; CCL5 protein, human ; CXCL8 protein, human ; Chemokine CCL5 ; Duffy Blood-Group System ; Integrin alpha4beta1 ; Interleukin-8 ; Receptors, Cell Surface ; Manganese (42Z2K6ZL8P)
    Language English
    Publishing date 2010-11-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1074/jbc.M110.173229
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Activation State of α4β1 Integrin on Sickle Red Blood Cells Is Linked to the Duffy Antigen Receptor for Chemokines (DARC) Expression

    Durpès, Marie-Claude / Hardy-Dessources, Marie-Dominique / El Nemer, Wassim / Picot, Julien / Lemonne, Nathalie / Elion, Jacques / Decastel, Monique

    Journal of biological chemistry. 2011 Jan. 28, v. 286, no. 4

    2011  

    Abstract: In sickle cell anemia, reticulocytes express enhanced levels of α4β1 integrin that interact mainly with vascular cell adhesion molecule-1 and fibronectin, promoting vaso-occlusion. These interactions are known to be highly sensitive to the inflammatory ... ...

    Abstract In sickle cell anemia, reticulocytes express enhanced levels of α4β1 integrin that interact mainly with vascular cell adhesion molecule-1 and fibronectin, promoting vaso-occlusion. These interactions are known to be highly sensitive to the inflammatory chemokine IL-8. The Duffy antigen receptor for chemokines (DARC) modulates the function of inflammatory processes. However, the link between α4β1 activation by chemokines and DARC erythroid expression is not or poorly explored. Therefore, the capacity of α4β1 to mediate Duffy-negative and Duffy-positive sickle reticulocyte (SRe) adhesion to immobilized vascular cell adhesion molecule-1 and fibronectin was evaluated. Using static adhesion assays, we found that, under basal conditions, Duffy-positive SRe adhesion was 2-fold higher than that of Duffy-negative SRes. Incubating the cells with IL-8 or RANTES (regulated on activation normal T cell expressed and secreted) increased Duffy-positive SRe adhesion only, whereas Mn²⁺ increased cell adhesion independently of the Duffy phenotype. Flow cytometry analyses performed with anti-β1 and anti-α4 antibodies, including a conformation-sensitive one, in the presence or absence of IL-8, revealed that Duffy-positive and Duffy-negative SRes displayed similar erythroid α4β1 expression levels, but with distinct activation states. IL-8 did not affect α4β1 affinity in Duffy-positive SRes but induced its clustering as corroborated by immunofluorescence microscopy. Our results indicate that in Duffy-negative SRes α4β1 integrin is constitutively expressed in a low affinity state, whereas in Duffy-positive SRes α4β1 is expressed in a higher chemokine-sensitive affinity state. This activation state associated with DARC RBC expression may influence the intensity of the inflammatory responses encountered in sickle cell anemia and participate in its interindividual clinical expression variability.
    Language English
    Dates of publication 2011-0128
    Size p. 3057-3064.
    Publishing place American Society for Biochemistry and Molecular Biology
    Document type Article
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  5. Article ; Online: Childhood sickle cell crises: clinical severity, inflammatory markers and the role of interleukin-8.

    Etienne-Julan, Maryse / Belloy, Marie-Sylvaine / Decastel, Monique / Dougaparsad, Samuel / Ravion, Sylvie / Hardy-Dessources, Marie-Dominique

    Haematologica

    2004  Volume 89, Issue 7, Page(s) 863–864

    Abstract: There is emerging consensus that a pro-inflammatory condition contributes to the vaso-occlusive complications of sickle cell disease (SCD). We evaluated the potential value of inflammatory mediators as early markers of severity of painful vaso-occlusive ... ...

    Abstract There is emerging consensus that a pro-inflammatory condition contributes to the vaso-occlusive complications of sickle cell disease (SCD). We evaluated the potential value of inflammatory mediators as early markers of severity of painful vaso-occlusive crises (VOC) in SCD. We assayed the plasma levels of cytokines, soluble vascular cell adhesion molecule-1, acute phase proteins, secretory phospholipase and standard hematologic indices.
    MeSH term(s) Anemia, Sickle Cell/blood ; Cytokines/blood ; Humans ; Inflammation Mediators/blood ; Interleukin-8/blood ; Interleukin-8/physiology ; Severity of Illness Index ; Vascular Cell Adhesion Molecule-1/blood
    Chemical Substances Cytokines ; Inflammation Mediators ; Interleukin-8 ; Vascular Cell Adhesion Molecule-1
    Language English
    Publishing date 2004-07
    Publishing country Italy
    Document type Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 2333-4
    ISSN 1592-8721 ; 0017-6567 ; 0390-6078
    ISSN (online) 1592-8721
    ISSN 0017-6567 ; 0390-6078
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: The placental-umbilical unit in sickle cell disease pregnancy: a model for studying in vivo functional adjustments to hypoxia in humans.

    Trampont, Paul / Roudier, Martine / Andrea, Anne-Marie / Nomal, Nelly / Mignot, Therese-Marie / Leborgne-Samuel, Yanick / Ravion, Sylvie / Clayton, John / Mary, Didier / Elion, Jacques / Decastel, Monique

    Human pathology

    2004  Volume 35, Issue 11, Page(s) 1353–1359

    Abstract: The placental-umbilical unit in sickle cell disease (SCD) pregnancy was used to explore hypoxia in vivo, an important factor in the pathophysiology of this disease. Gross examination and microscopic analysis of the placentas, taken immediately after ... ...

    Abstract The placental-umbilical unit in sickle cell disease (SCD) pregnancy was used to explore hypoxia in vivo, an important factor in the pathophysiology of this disease. Gross examination and microscopic analysis of the placentas, taken immediately after delivery, indicate good concordance between maturity and term as controls, but higher frequency of vascular injuries such as excess syncytial knots, excess fibrin deposits, congestion and villous necroses. Unexpectedly, neither leukocyte recruitment nor alteration in extraplacental membrane was observed, suggesting the absence of inflammation. Additionally, interleukin (IL)-6 and IL-8 concentrations, measured by enzyme-linked immunosorbent assay (ELISA), were similar in the placental maternal blood from controls and SCD. There were also no significant differences found in IL-6 vein blood concentrations between controls and SCD, IL-8 being not detected. Immunostaining of umbilical vein endothelium in SCD pregnancies showed redistribution of PECAM-1 (CD31), von Willebrand factor (vWF), and P-selectin to the cell surface, controls exhibiting the classical pattern. Staining quantification indicated increases in vWF (+36.2%; P=.006) and vascular endothelial growth factor (VEGF) expression (+96.0%; P=.006) over control, but a reduction in endothelial nitric oxide synthase (eNOS) (-45.5%; P=.029). These results document, for the first time, direct functional adjustments in response to hypoxia in human in vivo. The mechanism for these changes has not been clearly established, but it may reflect increased tolerance to SCD hypoxic conditions and hypoxia in general.
    MeSH term(s) Adaptation, Physiological ; Adolescent ; Adult ; Anemia, Sickle Cell/metabolism ; Anemia, Sickle Cell/pathology ; Biomarkers/analysis ; Endothelium, Vascular/metabolism ; Endothelium, Vascular/pathology ; Female ; Fetal Blood/metabolism ; Homeostasis ; Humans ; Hypoxia/metabolism ; Hypoxia/physiopathology ; Models, Biological ; Placenta/metabolism ; Placenta/pathology ; Platelet Endothelial Cell Adhesion Molecule-1/metabolism ; Pregnancy ; Pregnancy Complications, Hematologic/metabolism ; Pregnancy Complications, Hematologic/pathology ; Umbilical Cord/blood supply ; Umbilical Veins/metabolism ; Umbilical Veins/pathology ; Vascular Endothelial Growth Factor A/metabolism
    Chemical Substances Biomarkers ; Platelet Endothelial Cell Adhesion Molecule-1 ; VEGFA protein, human ; Vascular Endothelial Growth Factor A
    Language English
    Publishing date 2004-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 207657-3
    ISSN 1532-8392 ; 0046-8177
    ISSN (online) 1532-8392
    ISSN 0046-8177
    DOI 10.1016/j.humpath.2004.07.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top