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  • 1
    In: British Journal of Haematology, Wiley, Vol. 169, No. 6 ( 2015-06), p. 795-803
    Abstract: Recurrent mutations in MYD 88 have been identified in 〉 90% of lymphoplasmacytic lymphoma ( LPL ). Recently, WHIM (warts, hypogammaglobulinaemia, infections, myelokathexis) syndrome‐like mutations in CXCR 4 have been described in 28% of LPL cases, and seem to impact clinical presentation and response to therapy. We investigated the presence of the MYD 88 L265P mutation in 90 decalcified, formalin‐fixed, paraffin‐embedded ( FFPE ) bone marrow ( BM ) biopsies, including 51 cases of LPL , 14 cases of B‐cell chronic lymphocytic leukaemia ( CLL ), 13 cases of marginal zone lymphoma ( MZL ) and 12 normal controls. In addition, the C‐terminal domain of CXCR 4 was sequenced in LPL cases. MYD 88 L265P was found in 49/51 (96%) LPL cases and in 1/13 (7·6%) MZL (splenic type), whereas all CLL samples remained negative. The two MYD 88 wild type LPL cases were associated with cold agglutinin disease. Mutations in CXCR 4 were detected in 17/47 (36·2%) LPL cases, which showed a higher extent of BM infiltration and lower leucocyte counts ( P  = 0·02), haemoglobin ( P  = 0·05) and platelet counts ( P  = 0·01). In conclusion the detection of MYD 88 L265P mutation in FFPE samples is reliable and useful for subtyping small B‐cell lymphomas in BM biopsies. In addition, the presence of CXCR 4 mutations identifies a subgroup of LPL patients with higher disease activity.
    Type of Medium: Online Resource
    ISSN: 0007-1048 , 1365-2141
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 1475751-5
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2020
    In:  JDDG: Journal der Deutschen Dermatologischen Gesellschaft Vol. 18, No. 12 ( 2020-12), p. 1387-1392
    In: JDDG: Journal der Deutschen Dermatologischen Gesellschaft, Wiley, Vol. 18, No. 12 ( 2020-12), p. 1387-1392
    Abstract: Fusions involving neurotrophic tyrosine receptor kinase (NTRK) are known drivers of oncogenesis and also occur in melanoma, although very rarely. A particularly high incidence of NTRK gene fusions is reported in infantile fibrosarcoma ( 〉  90 %) or the secretory type of breast cancer ( 〉  90 %). Recently, larotrectinib (a tropomyosin receptor kinase [TRK] inhibitor) was approved, and we wondered whether TRK inhibitors might also be helpful for melanoma patients. We therefore screened the literature and obtained relevant results. NTRK fusions are relatively common in spitzoid melanoma, with a prevalence of 21–29 % compared to 〈  1 % in cutaneous or mucosal melanoma and 2.5 % in acral melanoma. It appears that fusion proteins are mutually exclusive for most common oncogenic drivers such as BRAF or NRAS. A further indicator of an increased probability of detecting NTRK‐positive tumors could be a low mutation load. Since TRK inhibitors are already available for patients with NTRK fusions, the challenge will be to implement screening for NTRK gene fusions in clinical practice. A possible approach could be to screen BRAF , NRAS and KIT wild‐type melanoma patients with next‐generation sequencing as soon as they need systemic treatment or at the latest when they have no tumor control on checkpoint inhibitors.
    Type of Medium: Online Resource
    ISSN: 1610-0379 , 1610-0387
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2099463-1
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  • 3
    Online Resource
    Online Resource
    Wiley ; 2020
    In:  JDDG: Journal der Deutschen Dermatologischen Gesellschaft Vol. 18, No. 12 ( 2020-12), p. 1387-1393
    In: JDDG: Journal der Deutschen Dermatologischen Gesellschaft, Wiley, Vol. 18, No. 12 ( 2020-12), p. 1387-1393
    Abstract: Fusionen der neurotrophen Tyrosin‐Rezeptor‐Kinase (NTRK) sind bekannte Treiber der Onkogenese und treten, wenn auch sehr selten, ebenfalls beim Melanom auf. Eine besonders hohe Inzidenz von NTRK‐ Genfusionen wird beim infantilen Fibrosarkom ( 〉  90 %) oder der sekretorischen Form des Mammakarzinoms ( 〉  90 %) berichtet. Erst kürzlich wurde Larotrectinib, ein Tropomyosin‐Rezeptor‐Kinase (TRK)‐Inhibitor, zugelassen, und wir fragten uns, ob TRK‐Inhibitoren auch für Melanompatienten relevant sein könnten. Aus diesem Grund haben wir die Literatur gesichtet und sind zu relevanten Ergebnissen gekommen. Beim spitzoiden Melanom sind NTRK‐ Fusionen mit einer Prävalenz von 21–29 % relativ häufig, verglichen mit 〈  1 % beim kutanen oder mukosalen und 2,5 % beim akralen Melanom. Es scheint so zu sein, dass sich Fusionsproteine und andere onkogene Treiber wie BRAF oder NRAS gegenseitig ausschließen. Ein weiterer Anhaltspunkt für eine erhöhte Wahrscheinlichkeit, NTRK ‐positive Tumoren zu detektieren, könnte eine geringe Tumormutationslast sein. Da für Patienten mit NTRK‐ Fusionen bereits TRK‐Inhibitoren zur Verfügung stehen, wird die Herausforderung darin bestehen, das Screening auf NTRK‐ Genfusionen in die klinische Praxis umzusetzen. Ein möglicher Ansatz könnte darin bestehen, BRAF‐ , NRAS‐ und KIT ‐Wildtyp‐Melanom‐Patienten mittels Next‐Generation Sequencing zu screenen, sobald sie eine systemische Therapie benötigen oder aber spätestens dann, wenn sie kein Therapieansprechen auf Checkpoint‐Inhibitoren zeigen.
    Type of Medium: Online Resource
    ISSN: 1610-0379 , 1610-0387
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2099463-1
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  • 4
    In: International Journal of Cancer, Wiley, Vol. 145, No. 11 ( 2019-12), p. 2996-3010
    Abstract: What's new? With increasingly comprehensive molecular profiling of cancers, the clinical interpretation of genetic alterations is becoming more and more challenging. Here the authors review several classifications for gene variant interpretation that were recently introduced to guide clinical management. They highlight shared features and differences and point out major influencing factors and unresolved issues that still need to be addressed. Based on this analysis, they propose a unified classification concept that may become broadly implemented when remaining issues are solved.
    Type of Medium: Online Resource
    ISSN: 0020-7136 , 1097-0215
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 218257-9
    detail.hit.zdb_id: 1474822-8
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