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  • 1
    In: Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, Elsevier BV, Vol. 403, No. 1-2 ( 1998-7), p. 103-112
    Materialart: Online-Ressource
    ISSN: 0027-5107
    RVK:
    Sprache: Englisch
    Verlag: Elsevier BV
    Publikationsdatum: 1998
    ZDB Id: 1491099-8
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Online-Ressource
    Online-Ressource
    American Society of Clinical Oncology (ASCO) ; 1999
    In:  Journal of Clinical Oncology Vol. 17, No. 2 ( 1999-02), p. 593-593
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 17, No. 2 ( 1999-02), p. 593-593
    Kurzfassung: PURPOSE: To explore whether there is a linkage between different mutations in the p53 gene in primary colorectal cancer and the risk of death from colorectal cancer in a large group of patients with long follow-up. We also compared a complementary DNA-based sequencing method and an immunohistochemical (IHC) method for detecting p53 protein overexpression in colorectal cancer. MATERIALS AND METHODS: The entire coding region of the p53 gene was sequenced in 191 frozen tumor samples collected from January 1988 to November 1992. RNA was extracted and synthesized to cDNA. p53 was amplified by the polymerase chain reaction, and the DO-7 monoclonal antibody was used in the IHC assessments. RESULTS: Mutations were detected in 99 samples (52%) from 189 patients. There was a significant relationship between the p53 mutational status and the cancer-specific survival time, with shorter survival time for patients who had p53 mutations than for those who did not (P = .01, log-rank test). Mutations outside the evolutionarily conserved regions were associated with the worst prognosis. Multivariate analysis showed that the presence of p53 mutations was an independent prognostic factor (relative hazard, 1.7, P = .03). There was no significant relationship between overexpression of p53 protein, as determined by IHC analysis, and cancer-specific survival. CONCLUSION: Mutational analyses of the p53 gene, using cDNA sequencing in colorectal cancer, provide useful prognostic information. In addition, cDNA sequencing gives better prognostic information than IHC assessment of p53 protein overexpression.
    Materialart: Online-Ressource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: American Society of Clinical Oncology (ASCO)
    Publikationsdatum: 1999
    ZDB Id: 2005181-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Online-Ressource
    Online-Ressource
    IOS Press ; 2020
    In:  Tumor Biology Vol. 42, No. 6 ( 2020-06), p. 101042832092452-
    In: Tumor Biology, IOS Press, Vol. 42, No. 6 ( 2020-06), p. 101042832092452-
    Kurzfassung: Several studies indicate that macrophage migration inhibitory factor 1 plays a role for tumor progression in colon cancer. We investigated whether determination of migration inhibitory factor 1 mRNA expression levels in lymph nodes of colon cancer patients could be used as a prognostic marker. Methods: Expression levels of migration inhibitory factor 1 and carcinoembryonic antigen mRNAs were assessed in primary tumors and regional lymph nodes of 123 colon cancer patients (stages I–IV), and in colon cancer- and immune cell lines using quantitative reverse transcriptase–polymerase chain reaction. Expression of migration inhibitory factor 1 protein was investigated by two-color immunohistochemistry and immunomorphometry. Results: Migration inhibitory factor 1 mRNA was expressed at 60 times higher levels in primary colon cancer tumors compared to normal colonic tissue (medians 8.2 and 0.2 mRNA copies/18S rRNA unit; p  〈  .0001). A highly significant difference in mRNA expression levels was found between hematoxylin-eosin positive lymph nodes and hematoxylin-eosin negative lymph nodes (p  〈  .0001). Migration inhibitory factor 1 and carcinoembryonic antigen proteins were simultaneously expressed in many colon cancer-tumor cells. Kaplan–Meier survival model and hazard ratio analysis, using a cutoff level at 2.19 mRNA copies/18S rRNA unit, revealed that patients with lymph nodes expressing high levels of migration inhibitory factor 1 mRNA had a 3.5-fold (p = .04) higher risk for recurrence, associated with a small, but significant, difference in mean survival time (7 months, p = .03) at 12 years of follow-up. Conclusion: Although migration inhibitory factor 1 mRNA expression levels were related to severity of disease and lymph node analysis revealed that colon cancer patients with high levels had a shorter survival time after surgery than those with low levels, the difference was small and probably not useful in clinical practice.
    Materialart: Online-Ressource
    ISSN: 1010-4283 , 1423-0380
    Sprache: Englisch
    Verlag: IOS Press
    Publikationsdatum: 2020
    ZDB Id: 605825-5
    ZDB Id: 1483579-4
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    In: International Journal of Molecular Sciences, MDPI AG, Vol. 23, No. 1 ( 2021-12-30), p. 403-
    Kurzfassung: The significance of cancer stem cells (CSCs) in initiation and progression of colon cancer (CC) has been established. In this study, we investigated the utility of measuring mRNA expression levels of CSC markers EpCAM, LGR5 and LGR4 for predicting survival outcome in surgically treated CC patients. Expression levels were determined in 5 CC cell lines, 66 primary CC tumors and 382 regional lymph nodes of 121 CC patients. Prognostic relevance was determined using Kaplan-Meier survival and Cox regression analyses. CC patients with lymph nodes expressing high levels of EpCAM, LGR5 or LGR4 (higher than a clinical cutoff of 0.07, 0.06 and 2.558 mRNA copies/18S rRNA unit, respectively) had a decreased mean survival time of 32 months for EpCAM and 42 months for both LGR5 and LGR4 at a 12-year follow-up (p = 0.022, p = 0.005 and p = 0.011, respectively). Additional patients at risk for recurrence were detected when LGR5 was combined with the biomarkers CXCL17 or CEA plus CXCL16. In conclusion, the study underscores LGR5 as a particularly useful prognostic biomarker and illustrates the strength of combining biomarkers detecting different subpopulations of cancer cells and/or cells in the tumor microenvironment for predicting recurrence.
    Materialart: Online-Ressource
    ISSN: 1422-0067
    Sprache: Englisch
    Verlag: MDPI AG
    Publikationsdatum: 2021
    ZDB Id: 2019364-6
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Online-Ressource
    Online-Ressource
    Spandidos Publications ; 2001
    In:  International Journal of Oncology ( 2001-09-01)
    In: International Journal of Oncology, Spandidos Publications, ( 2001-09-01)
    Materialart: Online-Ressource
    ISSN: 1019-6439 , 1791-2423
    RVK:
    Sprache: Unbekannt
    Verlag: Spandidos Publications
    Publikationsdatum: 2001
    ZDB Id: 2079608-0
    ZDB Id: 1154403-X
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    In: International Journal of Oncology, Spandidos Publications, ( 2002-08-01)
    Materialart: Online-Ressource
    ISSN: 1019-6439 , 1791-2423
    RVK:
    Sprache: Unbekannt
    Verlag: Spandidos Publications
    Publikationsdatum: 2002
    ZDB Id: 2079608-0
    ZDB Id: 1154403-X
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    In: Diseases of the Colon & Rectum, Ovid Technologies (Wolters Kluwer Health), Vol. 64, No. 11 ( 2021-11), p. 1354-1363
    Kurzfassung: Lymph node metastasis is the single most important prognostic risk factor for recurrence in patients with colon cancer who have undergone curative surgery. The routine method for detecting disseminated tumor cells in lymph nodes is microscopic examination of one or a few hematoxylin and eosin-stained tissue sections by a trained pathologist. This method, however, is insensitive mainly because less than 1% of the lymph node volume is examined, leading to misclassification. OBJECTIVE: This study aimed to investigate whether analysis of a selected group of biomarker mRNAs improves detection and characterization of lymph node metastases/micrometastases compared with the routine method. DESIGN: This study is a side-by-side comparison of biomarker mRNA analysis and histopathology of 185 lymph nodes from patients with colon cancer representing stages I to IV, and an investigation of the importance of lymph node tissue volume for tumor cell detection. SETTINGS: This is a collaborative study between a high-volume central hospital and a preclinical university institution. PATIENTS: Fifty-seven patients who had undergone tumor resection for colon cancer were included. MAIN OUTCOME MEASURES: The primary outcomes measured were mRNA copies per 18S rRNA copy of CEACAM5, KLK6, SLC35D3, POSTN, and MUC2 by multiplex assay and metastases/micrometastases detected by histopathology. RESULTS: The number of tumor cell-positive lymph nodes was 1.33-fold higher based on CEACAM5 mRNA levels compared with histopathological examination. Increasing the tissue volume analyzed for CEACAM5 levels from an 80-µm section to half a lymph node increased the number of positive nodes from 34 of 107 to 80 of 107 ( p 〈 0.0001). Similarly, the number of positive nodes for the aggressiveness marker KLK6 increased from 9 of 107 to 24 of 107. LIMITATIONS: Only a limited number of individual lymph nodes per patient was available for analysis. CONCLUSIONS: mRNA analysis of CEACAM5, KLK6, and SLC35D3 improves the detection of tumor cells in lymph nodes from patients surgically treated for colon cancer, and, together with POSTN and MUC2, it further allows characterization of the tumor cells with respect to aggressiveness and the tumor cell environment. See Video Abstract at http://links.lww.com/DCR/B650. EL ANÁLISIS DE ARNM DE CEACAM5, KLK6, SLC35D3, POSTN Y MUC2 MEJORA LA DETECCIÓN Y PERMITE LA CARACTERIZACIÓN DE CÉLULAS TUMORALES EN LOS GANGLIOS LINFÁTICOS DE PACIENTES CON CÁNCER DE COLON ANTECEDENTES: Las metástasis en los ganglios linfáticos son el factor de riesgo pronóstico más importante de recurrencia en pacientes con cáncer de colon que se han sometido a cirugía curativa. El método de rutina para detectar células tumorales diseminadas en los ganglios linfáticos es el examen microscópico de una o algunas secciones de tejido teñidas con hematoxilina-eosina por un patólogo capacitado. Sin embargo, este método es insensible principalmente porque se examina menos del 1% del volumen de los ganglios linfáticos, lo que conduce a una clasificación errónea. OBJETIVO: Investigar si el análisis de un grupo seleccionado de ARNm de biomarcadores mejora la detección y caracterización de metástasis / micrometástasis en los ganglios linfáticos en comparación con el método de rutina. DISEÑO: Una comparación en paralelo del análisis de ARNm de biomarcadores y la histopatología de 185 ganglios linfáticos de pacientes con cáncer de colon que representan las etapas I-IV, e investigación de la importancia del volumen de tejido de los ganglios linfáticos para la detección de células tumorales. ENTORNO CLINICO: Estudio colaborativo entre un hospital central de alto volumen y una institución universitaria preclínica. PACIENTES: Cincuenta y siete pacientes que han sido sometidos a resección tumoral por cáncer de colon. PRINCIPALES MEDIDAS DE VALORACION: copias de ARNm / copia de ARNr 18S de CEACAM5, KLK6, SLC35D3, POSTN y MUC2 mediante análisis múltiple y metástasis / micrometástasis detectadas por histopatología. RESULTADOS: El número de ganglios linfáticos con células tumorales positivas fue 1,33 veces mayor según los niveles de ARNm de CEACAM5 en comparación con el examen histopatológico. El aumento del volumen de tejido analizado para los niveles de CEACAM5 de una sección de 80 µm a la mitad de un ganglio linfático aumentó el número de ganglios positivos de 34/107 a 80/107 ( p 〈 0,0001). De manera similar, el número de nodos positivos para el marcador de agresividad KLK6 aumentó de 9/107 a 24/107. LIMITACIONES: Solo un número limitado de ganglios linfáticos individuales / paciente estuvo disponible para el análisis. CONCLUSIONES: El análisis de ARNm de CEACAM5, KLK6 y SLC35D3 mejora la detección de células tumorales en los ganglios linfáticos de pacientes con cáncer de colon tratados quirúrgicamente y, junto con POSTN y MUC2, permite además la caracterización de las células tumorales con respecto a la agresividad y el entorno celular tumoral. Consulte Video Resumen en http://links.lww.com/DCR/B650.
    Materialart: Online-Ressource
    ISSN: 0012-3706
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2021
    ZDB Id: 2046914-7
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    In: International Journal of Cancer, Wiley
    Kurzfassung: One fourth of colorectal cancer patients having curative surgery will relapse of which the majority will die. Lymph node (LN) metastasis is the single most important prognostic factor and a key factor when deciding on postoperative treatment. Presently, LN metastases are identified by histopathological examination, a subjective method analyzing only a small LN volume and giving no information on tumor aggressiveness. To better identify patients at risk of relapse we constructed a qRT‐PCR test, ColoNode, that determines levels of CEACAM5, KLK6, SLC35D3, MUC2 and POSTN mRNAs. Combined these biomarkers estimate the tumor cell load and aggressiveness allocating patients to risk categories with low (0, −1), medium (1), high (2) and very high (3) risk of recurrence. Here we present result of a prospective, national multicenter study including 196 colon cancer patients from 8 hospitals. On average, 21 LNs/patient, totally 4698 LNs, were examined by both histopathology and ColoNode. At 3‐year follow‐up, 36 patients had died from colon cancer or lived with recurrence. ColoNode identified all patients that were identified by histopathology and in addition 9 patients who were undetected by histopathology. Thus, 25% of the patients who recurred were identified by ColoNode only. Multivariate Cox regression analysis proved ColoNode (1, 2, 3 vs 0, −1) as a highly significant risk factor with HR 4.24 [95% confidence interval, 1.42‐12.69, P  = .01], while pTN‐stage (III vs I/II) lost its univariate significance. In conclusion, ColoNode surpassed histopathology by identifying a significantly larger number of patients with future relapse and will be a valuable tool for decisions on postoperative treatment.
    Materialart: Online-Ressource
    ISSN: 0020-7136 , 1097-0215
    RVK:
    Sprache: Englisch
    Verlag: Wiley
    Publikationsdatum: 2023
    ZDB Id: 218257-9
    ZDB Id: 1474822-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    In: Tumor Biology, IOS Press, Vol. 40, No. 9 ( 2018-08), p. 101042831879925-
    Materialart: Online-Ressource
    ISSN: 1010-4283 , 1423-0380
    Sprache: Englisch
    Verlag: IOS Press
    Publikationsdatum: 2018
    ZDB Id: 605825-5
    ZDB Id: 1483579-4
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    Online-Ressource
    Online-Ressource
    Oxford University Press (OUP) ; 2003
    In:  European Journal of Surgery Vol. 164, No. 1 ( 2003-12-02), p. 78-78
    In: European Journal of Surgery, Oxford University Press (OUP), Vol. 164, No. 1 ( 2003-12-02), p. 78-78
    Materialart: Online-Ressource
    ISSN: 1102-4151 , 1741-9271
    Sprache: Englisch
    Verlag: Oxford University Press (OUP)
    Publikationsdatum: 2003
    ZDB Id: 1492632-5
    Standort Signatur Einschränkungen Verfügbarkeit
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