Browsing by Author "Hewitt, Stephen M."

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    Associations of CDH1 germline variant location and cancer phenotype in families with hereditary diffuse gastric cancer (HDGC)
    (BMJ, 2019-06) Lo, Winifred; Zhu, Bin; Sabesan, Arvind; Wu, Ho-Hsiang; Powers, Astin; Sorber, Rebecca A.; Ravichandran, Sarangan; Chen, Ina; McDuffie, Lucas A.; Quadri, Humair S.; Beane, Joal D.; Calzone, Kathleen; Miettinen, Markku M.; Hewitt, Stephen M.; Koh, Christopher; Heller, Theo; Wacholder, Sholom; Rudloff, Udo; Surgery, School of Medicine
    INTRODUCTION: Hereditary diffuse gastric cancer (HDGC) is a cancer syndrome associated with variants in E-cadherin (CDH1), diffuse gastric cancer and lobular breast cancer. There is considerable heterogeneity in its clinical manifestations. This study aimed to determine associations between CDH1 germline variant status and clinical phenotypes of HDGC. METHODS: One hundred and fifty-two HDGC families, including six previously unreported families, were identified. CDH1 gene-specific guidelines released by the Clinical Genome Resource (ClinGen) CDH1 Variant Curation Expert Panel were applied for pathogenicity classification of truncating, missense and splice site CDH1 germline variants. We evaluated ORs between location of truncating variants of CDH1 and incidence of colorectal cancer, breast cancer and cancer at young age (gastric cancer at <40 or breast cancer <50 years of age). RESULTS: Frequency of truncating germline CDH1 variants varied across functional domains of the E-cadherin receptor gene and was highest in linker (0.05785 counts/base pair; p=0.0111) and PRE regions (0.10000; p=0.0059). Families with truncating CDH1 germline variants located in the PRE-PRO region were six times more likely to have family members affected by colorectal cancer (OR 6.20, 95% CI 1.79 to 21.48; p=0.004) compared with germline variants in other regions. Variants in the intracellular E-cadherin region were protective for cancer at young age (OR 0.2, 95% CI 0.06 to 0.64; p=0.0071) and in the linker regions for breast cancer (OR 0.35, 95% CI 0.12 to 0.99; p=0.0493). Different CDH1 genotypes were associated with different intracellular signalling activation levels including different p-ERK, p-mTOR and β-catenin levels in early submucosal T1a lesions of HDGC families with different CDH1 variants. CONCLUSION: Type and location of CDH1 germline variants may help to identify families at increased risk for concomitant cancers that might benefit from individualised surveillance and intervention strategies.
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    Report on computational assessment of Tumor Infiltrating Lymphocytes from the International Immuno-Oncology Biomarker Working Group
    (Nature Research, 2020-05-12) Amgad, Mohamed; Stovgaard, Elisabeth Specht; Balslev, Eva; Thagaard, Jeppe; Chen, Weijie; Dudgeon, Sarah; Sharma, Ashish; Kerner, Jennifer K.; Denkert, Carsten; Yuan, Yinyin; AbdulJabbar, Khalid; Wienert, Stephan; Savas, Peter; Voorwerk, Leonie; Beck, Andrew H.; Madabhushi, Anant; Hartman, Johan; Sebastian, Manu M.; Horlings, Hugo M.; Hudeček, Jan; Ciompi, Francesco; Moore, David A.; Singh, Rajendra; Roblin, Elvire; Balancin, Marcelo Luiz; Mathieu, Marie-Christine; Lennerz, Jochen K.; Kirtani, Pawan; Chen, I-Chun; Braybrooke, Jeremy P.; Pruneri, Giancarlo; Demaria, Sandra; Adams, Sylvia; Schnitt, Stuart J.; Lakhani, Sunil R.; Rojo, Federico; Comerma, Laura; Badve, Sunil S.; Khojasteh, Mehrnoush; Symmans, W. Fraser; Sotiriou, Christos; Gonzalez-Ericsson, Paula; Pogue-Geile, Katherine L.; Kim, Rim S.; Rimm, David L.; Viale, Giuseppe; Hewitt, Stephen M.; Bartlett, John M. S.; Penault-Llorca, Frédérique; Goel, Shom; Lien, Huang-Chun; Loibl, Sibylle; Kos, Zuzana; Loi, Sherene; Hanna, Matthew G.; Michiels, Stefan; Kok, Marleen; Nielsen, Torsten O.; Lazar, Alexander J.; Bago-Horvath, Zsuzsanna; Kooreman, Loes F. S.; Van der Laak, Jeroen A.W. M.; Saltz, Joel; Gallas, Brandon D.; Kurkure, Uday; Barnes, Michael; Salgado, Roberto; Cooper, Lee A. D.; International Immuno-Oncology Biomarker Working Group; Pathology and Laboratory Medicine, School of Medicine
    Assessment of tumor-infiltrating lymphocytes (TILs) is increasingly recognized as an integral part of the prognostic workflow in triple-negative (TNBC) and HER2-positive breast cancer, as well as many other solid tumors. This recognition has come about thanks to standardized visual reporting guidelines, which helped to reduce inter-reader variability. Now, there are ripe opportunities to employ computational methods that extract spatio-morphologic predictive features, enabling computer-aided diagnostics. We detail the benefits of computational TILs assessment, the readiness of TILs scoring for computational assessment, and outline considerations for overcoming key barriers to clinical translation in this arena. Specifically, we discuss: 1. ensuring computational workflows closely capture visual guidelines and standards; 2. challenges and thoughts standards for assessment of algorithms including training, preanalytical, analytical, and clinical validation; 3. perspectives on how to realize the potential of machine learning models and to overcome the perceptual and practical limits of visual scoring.
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    The tale of TILs in breast cancer: A report from The International Immuno-Oncology Biomarker Working Group
    (Springer Nature, 2021-12-01) El Bairi, Khalid; Haynes, Harry R.; Blackley, Elizabeth; Fineberg, Susan; Shear, Jeffrey; Turner, Sophia; de Freitas, Juliana Ribeiro; Sur, Daniel; Amendola, Luis Claudio; Gharib, Masoumeh; Kallala, Amine; Arun, Indu; Azmoudeh-Ardalan, Farid; Fujimoto, Luciana; Sua, Luz F.; Liu, Shi-Wei; Lien, Huang-Chun; Kirtani, Pawan; Balancin, Marcelo; El Attar, Hicham; Guleria, Prerna; Yang, Wenxian; Shash, Emad; Chen, I-Chun; Bautista, Veronica; Do Prado Moura, Jose Fernando; Rapoport, Bernardo L.; Castaneda, Carlos; Spengler, Eunice; Acosta-Haab, Gabriela; Frahm, Isabel; Sanchez, Joselyn; Castillo, Miluska; Bouchmaa, Najat; Md Zin, Reena R.; Shui, Ruohong; Onyuma, Timothy; Yang, Wentao; Husain, Zaheed; Willard-Gallo, Karen; Coosemans, An; Perez, Edith A.; Provenzano, Elena; Gonzalez Ericsson, Paula; Richardet, Eduardo; Mehrotra, Ravi; Sarancone, Sandra; Ehinger, Anna; Rimm, David L.; Bartlett, John M. S.; Viale, Giuseppe; Denkert, Carsten; Hida, Akira I.; Sotiriou, Christos; Loibl, Sibylle; Hewitt, Stephen M.; Badve, Sunil; Symmans, William Fraser; Kim, Rim S.; Pruneri, Giancarlo; Goel, Shom; Francis, Prudence A.; Inurrigarro, Gloria; Yamaguchi, Rin; Garcia-Rivello, Hernan; Horlings, Hugo; Afqir, Said; Salgado, Roberto; Adams, Sylvia; Kok, Marleen; Dieci, Maria Vittoria; Michiels, Stefan; Demaria, Sandra; Loi, Sherene; International Immuno-Oncology Biomarker Working Group; Pathology and Laboratory Medicine, School of Medicine
    The advent of immune-checkpoint inhibitors (ICI) in modern oncology has significantly improved survival in several cancer settings. A subgroup of women with breast cancer (BC) has immunogenic infiltration of lymphocytes with expression of programmed death-ligand 1 (PD-L1). These patients may potentially benefit from ICI targeting the programmed death 1 (PD-1)/PD-L1 signaling axis. The use of tumor-infiltrating lymphocytes (TILs) as predictive and prognostic biomarkers has been under intense examination. Emerging data suggest that TILs are associated with response to both cytotoxic treatments and immunotherapy, particularly for patients with triple-negative BC. In this review from The International Immuno-Oncology Biomarker Working Group, we discuss (a) the biological understanding of TILs, (b) their analytical and clinical validity and efforts toward the clinical utility in BC, and (c) the current status of PD-L1 and TIL testing across different continents, including experiences from low-to-middle-income countries, incorporating also the view of a patient advocate. This information will help set the stage for future approaches to optimize the understanding and clinical utilization of TIL analysis in patients with BC.