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3. Germinal center reentries of BCL2-overexpressing B cells drive follicular lymphoma progression

Author

Sungalee, Stephanie, Mamessier, Emilie, Morgado, Ester, Gregoire, Emilie, Brohawn, Philip Z., Morehouse, Christopher A., Jouve, Nathalie, Monvoisin, Celine, Menard, Cedric, Debroas, Guilhaume, Faroudi, Mustapha, Mechin, Violaine, Navarro, Jean-Marc, Drevet, Charlotte, Eberle, Franziska C., Chasson, Lionel, Baudimont, Fannie, Mancini, Stephane J., Tellier, Julie, Picquenot, Jean-Michel, Kelly, Rachel, Vineis, Paolo, Ruminy, Philippe, Chetaille, Bruno, Jaffe, Elaine S., Schiff, Claudine, Hardwigsen, Jean, Tice, David A., Higgs, Brandon W., Tarte, Karin, Nadel, Bertrand, and Roulland, Sandrine

Subjects
Physiological aspects, Development and progression, Genetic aspects, Research, B cells -- Physiological aspects -- Research, Lymphomas -- Development and progression -- Genetic aspects -- Research, Gene expression -- Research
Abstract

Introduction Germinal centers (GCs) represent critical sites within lymphoid tissues, where B cell responses to antigen are amplified and refined through the mechanism of affinity maturation (1). Recently, key dynamic [...], It has recently been demonstrated that memory B cells can reenter and reengage germinal center (GC) reactions, opening the possibility that multi-hit lymphomagenesis gradually occurs throughout life during successive immunological challenges. Here, we investigated this scenario in follicular lymphoma (FL), an indolent GC-derived malignancy. We developed a mouse model that recapitulates the FL hallmark t(14;18) translocation, which results in constitutive activation of antiapoptotic protein B cell lymphoma 2 (BCL2) in a subset of B cells, and applied a combination of molecular and immunofluorescence approaches to track normal and t[(14;18).sup.+] memory B cells in human and BCL2-overexpressing B cells in murine lymphoid tissues. BCL2-overexpressing B cells required multiple GC transits before acquiring FL-associated developmental arrest and presenting as GC B cells with constitutive activation-induced cytidine deaminase (AID) mutator activity. Moreover, multiple reentries into the GC were necessary for the progression to advanced precursor stages of FL. Together, our results demonstrate that protracted subversion of immune dynamics contributes to early dissemination and progression of t[(14;18).sup.+] precursors and shapes the systemic presentation of FL patients.

Published
2014
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7. Early steps of follicular lymphoma pathogenesis

Author

Roulland, Sandrine, Faroudi, Mustapha, Mamessier, Emilie, Sungalee, Stéphanie, Salles, Gilles, Nadel, Bertrand, Centre d'Immunologie de Marseille - Luminy (CIML), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Biologie Moléculaire de la Cellule (LBMC), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), and École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)

Subjects
MESH: Genes, bcl-2, Lymphoma, bcl-2, Translocation, Receptors, Fc, Lymphocyte Activation, Translocation, Genetic, Mice, MESH: Lymphoma, Follicular, Genetic, MESH: B-Lymphocytes, Receptors, Animals, Humans, MESH: Animals, MESH: Lymphocyte Activation, Lymphoma, Follicular, MESH: Mice, B-Lymphocytes, MESH: Humans, Fc, Follicular, MESH: Translocation, Genetic, Genes, bcl-2, DNA-Binding Proteins, Genes, Proto-Oncogene Proteins c-bcl-2, MESH: Proto-Oncogene Proteins c-bcl-2, Proto-Oncogene Proteins c-bcl-6, [SDV.IMM]Life Sciences [q-bio]/Immunology, MESH: Receptors, Fc, MESH: DNA-Binding Proteins
Abstract

International audience; Follicular lymphoma (FL) pathogenesis is a complex and fascinating multi-hit process, escalating along successive derailments of the distinctive molecular and cellular mechanisms paving B-cell differentiation and activation. This progressive subversion of B-cell receptor diversification mechanisms and B-cell homeostasis likely occurs during a protracted preclinical phase of asymptomatic growth, in which premalignant clones already disseminate and establish "niches" in secondary lymphoid organs. Following FL diagnosis, a parallel indolent behavior is observed in most patients, slowly progressing over a period of many years, to eventually generate a highly refractory (and in some case transform into an aggressive subtype of) lymphoma. Novel insights in human germinal center B-cell biology recently allowed a more comprehensive understanding of the various illegitimate events sequentially involved in the premalignant progression phases. In this review, we will discuss how these new data have modified our perception of early FL pathogenesis, the new questions and challenges it opened up, and how this knowledge could impact on innovative programs of early detection, follow-up, and patient management.

Published
2011
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9. Mechanism and function of Vav1 localisation in TCR signalling.

Author

Ksionda, Olga, Saveliev, Alexander, Köchl, Robert, Rapley, Jonathan, Faroudi, Mustapha, Smith-Garvin, Jennifer E., Wülfing, Christoph, Rittinger, Katrin, Carter, Tom, and Tybulewicz, Victor L. J.

Subjects
ANTIGENS, T cells, MICROCLUSTERS, CELL communication, GUANINE nucleotide exchange factors
Abstract

The article discusses antigen-specific activation of T cells. According to the article, It is triggered by the binding of the cell surface T cell antigen receptor (TCR) to antigenic peptide bound to MHC molecules (pMHC) on the surface of anantigen-presenting cell (APC). The Vav1 guanine nucleotide exchange factor plays an importatl role in T cell antigen receptor (TCR) signalling, leading to the activation of multiple pathways. The authors propose that Vav1 is recruited to the IS by binding to SLP76 and that this interaction is critical for the transduction of signals leading to calcium flux.

Published
2012
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10. Visualizing CTL/melanoma cell interactions: multiple hits must be delivered for tumour cell annihilation.

Author

Caramalho, Íris, Faroudi, Mustapha, Padovan, Elisabetta, Müller, Sabina, and Valitutti, Salvatore

Subjects
CANCER cells, MELANOMA, TUMORS, NEUROENDOCRINE tumors, T cells
Abstract

It is well established that cytotoxic T lymphocytes (CTL) can kill target cells offering a very small number of specific peptide/MHC complexes (pMHC). It is also known that lethal hit delivery is a very rapid response that occurs within a few minutes after cell–cell contact. Whether cytotoxicity is efficient and rapid in the context of CTL interaction with target cells derived from solid tumours is still elusive. We addressed this question by visualizing the dynamics of human CTL interaction with melanoma cells and their efficiency in eliciting cytotoxicity. Our results show that in spite of CTL activation to lethal hit delivery, killing of melanoma cells is not efficient. Time-lapse microscopy experiments demonstrate that individual CTL rapidly polarize their lytic machinery towards target cells, yet the apoptotic process in melanoma cells is defective or ‘delayed’ as compared to conventional targets. These results indicate that although CTL activation to lethal hit delivery can be viewed as a ‘digital’ phenomenon rapidly triggered by a few ligands, melanoma cell annihilation is an ‘analogue’ response requiring multiple hits and prolonged contact time. [ABSTRACT FROM AUTHOR]

Published
2009
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11. 31st Annual Meeting and Associated Programs of the Society for Immunotherapy of Cancer (SITC 2016): part one: National Harbor, MD, USA. 9-13 November 2016

Author

Lundqvist, Andreas, van Hoef, Vincent, Zhang, Xiaonan, Wennerberg, Erik, Lorent, Julie, Witt, Kristina, Sanz, Laia Masvidal, Liang, Shuo, Murray, Shannon, Larsson, Ola, Kiessling, Rolf, Mao, Yumeng, Sidhom, John-William, Bessell, Catherine A., Havel, Jonathan, Schneck, Jonathan, Chan, Timothy A., Sachsenmeier, Eliot, Woods, David, Berglund, Anders, Ramakrishnan, Rupal, Sodre, Andressa, Weber, Jeffrey, Zappasodi, Roberta, Li, Yanyun, Qi, Jingjing, Wong, Philip, Sirard, Cynthia, Postow, Michael, Newman, Walter, Koon, Henry, Velcheti, Vamsidhar, Callahan, Margaret K., Wolchok, Jedd D., Merghoub, Taha, Lum, Lawrence G., Choi, Minsig, Thakur, Archana, Deol, Abhinav, Dyson, Gregory, Shields, Anthony, Haymaker, Cara, Uemura, Marc, Murthy, Ravi, James, Marihella, Wang, Daqing, Brevard, Julie, Monaghan, Catherine, Swann, Suzanne, Geib, James, Cornfeld, Mark, Chunduru, Srinivas, Agrawal, Sudhir, Yee, Cassian, Wargo, Jennifer, Patel, Sapna P., Amaria, Rodabe, Tawbi, Hussein, Glitza, Isabella, Woodman, Scott, Hwu, Wen-Jen, Davies, Michael A., Hwu, Patrick, Overwijk, Willem W., Bernatchez, Chantale, Diab, Adi, Massarelli, Erminia, Segal, Neil H., Ribrag, Vincent, Melero, Ignacio, Gangadhar, Tara C., Urba, Walter, Schadendorf, Dirk, Ferris, Robert L., Houot, Roch, Morschhauser, Franck, Logan, Theodore, Luke, Jason J., Sharfman, William, Barlesi, Fabrice, Ott, Patrick A., Mansi, Laura, Kummar, Shivaani, Salles, Gilles, Carpio, Cecilia, Meier, Roland, Krishnan, Suba, McDonald, Dan, Maurer, Matthew, Gu, Xuemin, Neely, Jaclyn, Suryawanshi, Satyendra, Levy, Ronald, Khushalani, Nikhil, Wu, Jennifer, Zhang, Jinyu, Basher, Fahmin, Rubinstein, Mark, Bucsek, Mark, Qiao, Guanxi, MacDonald, Cameron, Hylander, Bonnie, Repasky, Elizabeth, Chatterjee, Shilpak, Daenthanasanmak, Anusara, Chakraborty, Paramita, Toth, Kyle, Meek, Megan, Garrett-Mayer, Elizabeth, Nishimura, Michael, Paulos, Chrystal, Beeson, Craig, Yu, Xuezhong, Mehrotra, Shikhar, Zhao, Fei, Evans, Kathy, Xiao, Christine, Holtzhausen, Alisha, Hanks, Brent A., Scharping, Nicole, Menk, Ashley V., Moreci, Rebecca, Whetstone, Ryan, Dadey, Rebekah, Watkins, Simon, Ferris, Robert, Delgoffe, Greg M., Peled, Jonathan, Devlin, Sean, Staffas, Anna, Lumish, Melissa, Rodriguez, Kori Porosnicu, Ahr, Katya, Perales, Miguel, Giralt, Sergio, Taur, Ying, Pamer, Eric, van den Brink, Marcel R. M., Jenq, Robert, Annels, Nicola, Pandha, Hardev, Simpson, Guy, Mostafid, Hugh, Harrington, Kevin, Melcher, Alan, Grose, Mark, Davies, Bronwyn, Au, Gough, Karpathy, Roberta, Shafren, Darren, Ricca, Jacob, Zamarin, Dmitriy, Batista, Luciana, Marliot, Florence, Vasaturo, Angela, Carpentier, Sabrina, Poggionovo, Cécile, Frayssinet, Véronique, Fieschi, Jacques, Van den Eynde, Marc, Pagès, Franck, Galon, Jérôme, Hermitte, Fabienne, Smith, Sean G., Nguyen, Khue, Ravindranathan, Sruthi, Koppolu, Bhanu, Zaharoff, David, Schvartsman, Gustavo, Bassett, Roland, McQuade, Jennifer L., Haydu, Lauren E., Kline, Douglas, Chen, Xiufen, Fosco, Dominick, Kline, Justin, Overacre, Abigail, Chikina, Maria, Brunazzi, Erin, Shayan, Gulidanna, Horne, William, Kolls, Jay, Bruno, Tullia C., Workman, Creg, Vignali, Dario, Adusumilli, Prasad S., Ansa-Addo, Ephraim A, Li, Zihai, Gerry, Andrew, Sanderson, Joseph P., Howe, Karen, Docta, Roslin, Gao, Qian, Bagg, Eleanor A. L., Tribble, Nicholas, Maroto, Miguel, Betts, Gareth, Bath, Natalie, Melchiori, Luca, Lowther, Daniel E., Ramachandran, Indu, Kari, Gabor, Basu, Samik, Binder-Scholl, Gwendolyn, Chagin, Karen, Pandite, Lini, Holdich, Tom, Amado, Rafael, Zhang, Hua, Glod, John, Bernstein, Donna, Jakobsen, Bent, Mackall, Crystal, Wong, Ryan, Silk, Jonathan D., Adams, Katherine, Hamilton, Garth, Bennett, Alan D., Brett, Sara, Jing, Junping, Quattrini, Adriano, Saini, Manoj, Wiedermann, Guy, Brewer, Joanna, Duong, MyLinh, Lu, An, Chang, Peter, Mahendravada, Aruna, Shinners, Nicholas, Slawin, Kevin, Spencer, David M., Foster, Aaron E., Bayle, J. Henri, Bergamaschi, Cristina, Ng, Sinnie Sin Man, Nagy, Bethany, Jensen, Shawn, Hu, Xintao, Alicea, Candido, Fox, Bernard, Felber, Barbara, Pavlakis, George, Chacon, Jessica, Yamamoto, Tori, Garrabrant, Thomas, Cortina, Luis, Powell, Daniel J., Donia, Marco, Kjeldsen, Julie Westerlin, Andersen, Rikke, Westergaard, Marie Christine Wulff, Bianchi, Valentina, Legut, Mateusz, Attaf, Meriem, Dolton, Garry, Szomolay, Barbara, Ott, Sascha, Lyngaa, Rikke, Hadrup, Sine Reker, Sewell, Andrew Kelvin, Svane, Inge Marie, Fan, Aaron, Kumai, Takumi, Celis, Esteban, Frank, Ian, Stramer, Amanda, Blaskovich, Michelle A., Wardell, Seth, Fardis, Maria, Bender, James, Lotze, Michael T., Goff, Stephanie L., Zacharakis, Nikolaos, Assadipour, Yasmine, Prickett, Todd D., Gartner, Jared J., Somerville, Robert, Black, Mary, Xu, Hui, Chinnasamy, Harshini, Kriley, Isaac, Lu, Lily, Wunderlich, John, Robbins, Paul F., Rosenberg, Steven, Feldman, Steven A., Trebska-McGowan, Kasia, Malekzadeh, Parisa, Payabyab, Eden, Sherry, Richard, Gokuldass, Aishwarya, Kopits, Charlene, Rabinovich, Brian, Green, Daniel S., Kamenyeva, Olena, Zoon, Kathryn C., Annunziata, Christina M., Hammill, Joanne, Helsen, Christopher, Aarts, Craig, Bramson, Jonathan, Harada, Yui, Yonemitsu, Yoshikazu, Mwawasi, Kenneth, Denisova, Galina, Giri, Rajanish, Jin, Benjamin, Campbell, Tracy, Draper, Lindsey M., Stevanovic, Sanja, Yu, Zhiya, Weissbrich, Bianca, Restifo, Nicholas P., Trimble, Cornelia L., Hinrichs, Christian S., Tsang, Kwong, Fantini, Massimo, Hodge, James W., Fujii, Rika, Fernando, Ingrid, Jochems, Caroline, Heery, Christopher, Gulley, James, Soon-Shiong, Patrick, Schlom, Jeffrey, Jing, Weiqing, Gershan, Jill, Blitzer, Grace, Weber, James, McOlash, Laura, Johnson, Bryon D., Kiany, Simin, Gangxiong, Huang, Kleinerman, Eugenie S., Klichinsky, Michael, Ruella, Marco, Shestova, Olga, Kenderian, Saad, Kim, Miriam, Scholler, John, June, Carl H., Gill, Saar, Moogk, Duane, Zhong, Shi, Liadi, Ivan, Rittase, William, Fang, Victoria, Dougherty, Janna, Perez-Garcia, Arianne, Osman, Iman, Zhu, Cheng, Varadarajan, Navin, Frey, Alan, Krogsgaard, Michelle, Landi, Daniel, Fousek, Kristen, Mukherjee, Malini, Shree, Ankita, Joseph, Sujith, Bielamowicz, Kevin, Byrd, Tiara, Ahmed, Nabil, Hegde, Meenakshi, Lee, Sylvia, Byrd, David, Thompson, John, Bhatia, Shailender, Tykodi, Scott, Delismon, Judy, Chu, Liz, Abdul-Alim, Siddiq, Ohanian, Arpy, DeVito, Anna Marie, Riddell, Stanley, Margolin, Kim, Magalhaes, Isabelle, Mattsson, Jonas, Uhlin, Michael, Nemoto, Satoshi, Villarroel, Patricio Pérez, Nakagawa, Ryosuke, Mule, James J., Mailloux, Adam W., Mata, Melinda, Nguyen, Phuong, Gerken, Claudia, DeRenzo, Christopher, Gottschalk, Stephen, Mathieu, Mélissa, Pelletier, Sandy, Stagg, John, Turcotte, Simon, Minutolo, Nicholas, Sharma, Prannda, Tsourkas, Andrew, Mockel-Tenbrinck, Nadine, Mauer, Daniela, Drechsel, Katharina, Barth, Carola, Freese, Katharina, Kolrep, Ulrike, Schult, Silke, Assenmacher, Mario, Kaiser, Andrew, Mullinax, John, Hall, MacLean, Le, Julie, Kodumudi, Krithika, Royster, Erica, Richards, Allison, Gonzalez, Ricardo, Sarnaik, Amod, Pilon-Thomas, Shari, Nielsen, Morten, Krarup-Hansen, Anders, Hovgaard, Dorrit, Petersen, Michael Mørk, Loya, Anand Chainsukh, Junker, Niels, Rivas, Charlotte, Parihar, Robin, Rooney, Cliona M., Qin, Haiying, Nguyen, Sang, Su, Paul, Burk, Chad, Duncan, Brynn, Kim, Bong-Hyun, Kohler, M. Eric, Fry, Terry, Rao, Arjun A., Teyssier, Noam, Pfeil, Jacob, Sgourakis, Nikolaos, Salama, Sofie, Haussler, David, Richman, Sarah A., Nunez-Cruz, Selene, Gershenson, Zack, Mourelatos, Zissimos, Barrett, David, Grupp, Stephan, Milone, Michael, Rodriguez-Garcia, Alba, Robinson, Matthew K., Adams, Gregory P., Santos, João, Havunen, Riikka, Siurala, Mikko, Cervera-Carrascón, Víctor, Parviainen, Suvi, Antilla, Marjukka, Hemminki, Akseli, Sethuraman, Jyothi, Santiago, Laurelis, Chen, Jie Qing, Dai, Zhimin, Sha, Huizi, Su, Shu, Ding, Naiqing, Liu, Baorui, Pasetto, Anna, Helman, Sarah R., Rosenberg, Steven A., Burgess, Melissa, Zhang, Hui, Lee, Tien, Klingemann, Hans, Nghiem, Paul, Kirkwood, John M., Rossi, John M., Sherman, Marika, Xue, Allen, Shen, Yueh-wei, Navale, Lynn, Kochenderfer, James N., Bot, Adrian, Veerapathran, Anandaraman, Wiener, Doris, Waller, Edmund K., Li, Jian-Ming, Petersen, Christopher, Blazar, Bruce R., Li, Jingxia, Giver, Cynthia R., Wang, Ziming, Grossenbacher, Steven K., Sturgill, Ian, Canter, Robert J., Murphy, William J., Zhang, Congcong, Burger, Michael C., Jennewein, Lukas, Waldmann, Anja, Mittelbronn, Michel, Tonn, Torsten, Steinbach, Joachim P., Wels, Winfried S., Williams, Jason B., Zha, Yuanyuan, Gajewski, Thomas F., Williams, LaTerrica C., Krenciute, Giedre, Kalra, Mamta, Louis, Chrystal, Xin, Gang, Schauder, David, Jiang, Aimin, Joshi, Nikhil, Cui, Weiguo, Zeng, Xue, Zhao, Zeguo, Hamieh, Mohamad, Eyquem, Justin, Gunset, Gertrude, Bander, Neil, Sadelain, Michel, Askmyr, David, Abolhalaj, Milad, Lundberg, Kristina, Greiff, Lennart, Lindstedt, Malin, Angell, Helen K., Kim, Kyoung-Mee, Kim, Seung-Tae, Kim, Sung, Sharpe, Alan D., Ogden, Julia, Davenport, Anna, Hodgson, Darren R., Barrett, Carl, Lee, Jeeyun, Kilgour, Elaine, Hanson, Jodi, Caspell, Richard, Karulin, Alexey, Lehmann, Paul, Ansari, Tameem, Schiller, Annemarie, Sundararaman, Srividya, Roen, Diana, Ayers, Mark, Levitan, Diane, Arreaza, Gladys, Liu, Fang, Mogg, Robin, Bang, Yung-Jue, O’Neil, Bert, Cristescu, Razvan, Friedlander, Philip, Wassman, Karl, Kyi, Chrisann, Oh, William, Bhardwaj, Nina, Bornschlegl, Svetlana, Gustafson, Michael P., Gastineau, Dennis A., Parney, Ian F., Dietz, Allan B., Carvajal-Hausdorf, Daniel, Mani, Nikita, Schalper, Kurt, Rimm, David, Chang, Serena, Kurland, John, Ahlers, Christoph Matthias, Jure-Kunkel, Maria, Cohen, Lewis, Maecker, Holden, Kohrt, Holbrook, Chen, Shuming, Crabill, George, Pritchard, Theresa, McMiller, Tracee, Pardoll, Drew, Pan, Fan, Topalian, Suzanne, Danaher, Patrick, Warren, Sarah, Dennis, Lucas, White, Andrew M., D’Amico, Leonard, Geller, Melissa, Disis, Mary L., Beechem, Joseph, Odunsi, Kunle, Fling, Steven, Derakhshandeh, Roshanak, Webb, Tonya J., Dubois, Sigrid, Conlon, Kevin, Bryant, Bonita, Hsu, Jennifer, Beltran, Nancy, Müller, Jürgen, Waldmann, Thomas, Duhen, Rebekka, Duhen, Thomas, Thompson, Lucas, Montler, Ryan, Weinberg, Andrew, Kates, Max, Early, Brandon, Yusko, Erik, Schreiber, Taylor H., Bivalacqua, Trinity J., Lunceford, Jared, Nebozhyn, Michael, Murphy, Erin, Loboda, Andrey, Kaufman, David R., Albright, Andrew, Cheng, Jonathan, Kang, S. Peter, Shankaran, Veena, Piha-Paul, Sarina A., Yearley, Jennifer, Seiwert, Tanguy, Ribas, Antoni, McClanahan, Terrill K., Sher, Xinwei, Liu, Xiao Qiao, Joe, Andrew, Plimack, Elizabeth, Forrest-Hay, Alex, Guyre, Cheryl A., Narumiya, Kohei, Delcommenne, Marc, Hirsch, Heather A., Deshpande, Amit, Reeves, Jason, Shu, Jenny, Zi, Tong, Michaelson, Jennifer, Law, Debbie, Trehu, Elizabeth, Sathyanaryanan, Sriram, Hodkinson, Brendan P., Hutnick, Natalie A., Schaffer, Michael E., Gormley, Michael, Hulett, Tyler, Ballesteros-Merino, Carmen, Dubay, Christopher, Afentoulis, Michael, Reddy, Ashok, David, Larry, Jayant, Kumar, Agrawal, Swati, Agrawal, Rajendra, Jeyakumar, Ghayathri, Kim, Seongho, Kim, Heejin, Silski, Cynthia, Suisham, Stacey, Heath, Elisabeth, Vaishampayan, Ulka, Vandeven, Natalie, Viller, Natasja Nielsen, O’Connor, Alison, Chen, Hui, Bossen, Bolette, Sievers, Eric, Uger, Robert, Johnson, Lisa, Kao, Hsiang-Fong, Hsiao, Chin-Fu, Lai, Shu-Chuan, Wang, Chun-Wei, Ko, Jenq-Yuh, Lou, Pei-Jen, Lee, Tsai-Jan, Liu, Tsang-Wu, Hong, Ruey-Long, Kearney, Staci J., Black, Joshua C., Landis, Benjamin J., Koegler, Sally, Hirsch, Brooke, Gianani, Roberto, Kim, Jeffrey, He, Ming-Xiao, Zhang, Bingqing, Su, Nan, Luo, Yuling, Ma, Xiao-Jun, Park, Emily, Kim, Dae Won, Copploa, Domenico, Kothari, Nishi, doo Chang, Young, Kim, Richard, Kim, Namyong, Lye, Melvin, Wan, Ee, Knaus, Hanna A., Berglund, Sofia, Hackl, Hubert, Karp, Judith E., Gojo, Ivana, Luznik, Leo, Hong, Henoch S., Koch, Sven D., Scheel, Birgit, Gnad-Vogt, Ulrike, Kallen, Karl-Josef, Wiegand, Volker, Backert, Linus, Kohlbacher, Oliver, Hoerr, Ingmar, Fotin-Mleczek, Mariola, Billingsley, James M., Koguchi, Yoshinobu, Conrad, Valerie, Miller, William, Gonzalez, Iliana, Poplonski, Tomasz, Meeuwsen, Tanisha, Howells-Ferreira, Ana, Rattray, Rogan, Campbell, Mary, Bifulco, Carlo, Bahjat, Keith, Curti, Brendan, Vetsika, E-K, Kallergi, G., Aggouraki, Despoina, Lyristi, Z., Katsarlinos, P., Koinis, Filippos, Georgoulias, V., Kotsakis, Athanasios, Martin, Nathan T., Aeffner, Famke, Cerkovnik, Logan, Pratte, Luke, Kim, Rebecca, Krueger, Joseph, Martínez-Usatorre, Amaia, Jandus, Camilla, Donda, Alena, Carretero-Iglesia, Laura, Speiser, Daniel E., Zehn, Dietmar, Rufer, Nathalie, Romero, Pedro, Panda, Anshuman, Mehnert, Janice, Hirshfield, Kim M., Riedlinger, Greg, Damare, Sherri, Saunders, Tracie, Sokol, Levi, Stein, Mark, Poplin, Elizabeth, Rodriguez-Rodriguez, Lorna, Silk, Ann, Chan, Nancy, Frankel, Melissa, Kane, Michael, Malhotra, Jyoti, Aisner, Joseph, Kaufman, Howard L., Ali, Siraj, Ross, Jeffrey, White, Eileen, Bhanot, Gyan, Ganesan, Shridar, Monette, Anne, Bergeron, Derek, Amor, Amira Ben, Meunier, Liliane, Caron, Christine, Morou, Antigoni, Kaufmann, Daniel, Liberman, Moishe, Jurisica, Igor, Mes-Masson, Anne-Marie, Hamzaoui, Kamel, Lapointe, Rejean, Mongan, Ann, Ku, Yuan-Chieh, Tom, Warren, Sun, Yongming, Pankov, Alex, Looney, Tim, Au-Young, Janice, Hyland, Fiona, Conroy, Jeff, Morrison, Carl, Glenn, Sean, Burgher, Blake, Ji, He, Gardner, Mark, Omilian, Angela R., Bshara, Wiam, Angela, Omilian, Obeid, Joseph M., Erdag, Gulsun, Smolkin, Mark E., Deacon, Donna H., Patterson, James W., Chen, Lieping, Bullock, Timothy N., Slingluff, Craig L., Loffredo, John T., Vuyyuru, Raja, Beyer, Sophie, Spires, Vanessa M., Fox, Maxine, Ehrmann, Jon M., Taylor, Katrina A., Korman, Alan J., Graziano, Robert F., Page, David, Sanchez, Katherine, Martel, Maritza, De Macedo, Mariana Petaccia, Qin, Yong, Reuben, Alex, Spencer, Christine, Guindani, Michele, Racolta, Adriana, Kelly, Brian, Jones, Tobin, Polaske, Nathan, Theiss, Noah, Robida, Mark, Meridew, Jeffrey, Habensus, Iva, Zhang, Liping, Pestic-Dragovich, Lidija, Tang, Lei, Olencki, Thomas, Hutson, Thomas, Roder, Joanna, Blackmon, Shauna, Roder, Heinrich, Stewart, John, Amin, Asim, Ernstoff, Marc S., Clark, Joseph I., Atkins, Michael B., Sosman, Jeffrey, Kluger, Harriet, Halaban, Ruth, Snzol, Mario, Asmellash, Senait, Steingrimsson, Arni, Wang, Chichung, Roman, Kristin, Clement, Amanda, Downing, Sean, Hoyt, Clifford, Harder, Nathalie, Schmidt, Guenter, Schoenmeyer, Ralf, Brieu, Nicolas, Yigitsoy, Mehmet, Madonna, Gabriele, Botti, Gerardo, Grimaldi, Antonio, Ascierto, Paolo A., Huss, Ralf, Athelogou, Maria, Hessel, Harald, Buchner, Alexander, Stief, Christian, Binnig, Gerd, Kirchner, Thomas, Sellappan, Shankar, Thyparambil, Sheeno, Schwartz, Sarit, Cecchi, Fabiola, Nguyen, Andrew, Vaske, Charles, Hembrough, Todd, Spacek, Jan, Vocka, Michal, Zavadova, Eva, Skalova, Helena, Dundr, Pavel, Petruzelka, Lubos, Francis, Nicole, Tilman, Rau T., Hartmann, Arndt, Netikova, Irena, Stump, Julia, Tufman, Amanda, Berger, Frank, Neuberger, Michael, Hatz, Rudolf, Lindner, Michael, Sanborn, Rachel E., Handy, John, Huber, Rudolf M., Winter, Hauke, Reu, Simone, Sun, Cheng, Xiao, Weihua, Tian, Zhigang, Ting, David, Tsai, Katy, Nosrati, Adi, Goldinger, Simone, Hamid, Omid, Algazi, Alain, Tumeh, Paul, Hwang, Jimmy, Liu, Jacqueline, Chen, Lawrence, Dummer, Reinhard, Rosenblum, Michael, Daud, Adil, Tsao, Tsu-Shuen, Ashworth-Sharpe, Julia, Johnson, Donald, Bhaumik, Srabani, Bieniarz, Christopher, Couto, Joseph, Farrell, Michael, Ghaffari, Mahsa, Hubbard, Antony, Kosmeder, Jerome, Lee, Cleo, Marner, Erin, Uribe, Diana, Zhang, Hongjun, Zhang, Jian, Zhang, Wenjun, Zhu, Yifei, Morrison, Larry, Tsujikawa, Takahiro, Borkar, Rohan N., Azimi, Vahid, Kumar, Sushil, Thibault, Guillaume, Mori, Motomi, El Rassi, Edward, Clayburgh, Daniel R., Kulesz-Martin, Molly F., Flint, Paul W., Coussens, Lisa M., Villabona, Lisa, Masucci, Giuseppe V., Geiss, Gary, Birditt, Brian, Mei, Qian, Huang, Alan, Eagan, Maribeth A., Ignacio, Eduardo, Elliott, Nathan, Dunaway, Dwayne, Jung, Jaemyeong, Merritt, Chris, Sprague, Isaac, Webster, Philippa, Liang, Yan, Wenthe, Jessica, Enblad, Gunilla, Karlsson, Hannah, Essand, Magnus, Savoldo, Barbara, Dotti, Gianpietro, Höglund, Martin, Brenner, Malcolm K., Hagberg, Hans, Loskog, Angelica, Bernett, Matthew J., Moore, Gregory L., Hedvat, Michael, Bonzon, Christine, Chu, Seung, Rashid, Rumana, Avery, Kendra N., Muchhal, Umesh, Desjarlais, John, Kraman, Matthew, Kmiecik, Katarzyna, Allen, Natalie, Faroudi, Mustapha, Zimarino, Carlo, Wydro, Mateusz, Doody, Jacqueline, Srinivasa, Sreesha P., Govindappa, Nagaraja, Reddy, Praveen, Dubey, Aparajita, Periyasamy, Sankar, Adekandi, Madhukara, Dey, Chaitali, Joy, Mary, van Loo, Pieter Fokko, Veninga, Henrike, Shamsili, Setareh, Throsby, Mark, Dolstra, Harry, Bakker, Lex, Alva, Ajjai, Gschwendt, Juergen, Loriot, Yohann, Feng, Dai, Poehlein, Christian, Powles, Thomas, Antonarakis, Emmanuel S., Drake, Charles G., Wu, Haiyan, De Bono, Johann, Bannerji, Rajat, Byrd, John, Gregory, Gareth, Opat, Stephen, Shortt, Jake, Thompson, Seth, Balakumaran, Arun, Kumar, Shaji, Rini, Brian I., Mariani, Mariangela, Albiges, Laurence, Haanen, John B., Larkin, James, Schmidinger, Manuela, Magazzù, Domenico, di Pietro, Alessandra, Motzer, Robert J., Borch, Troels Holz, Kongsted, Per, Pedersen, Magnus, Met, Özcan, Boudadi, Karim, Wang, Hao, Vasselli, James, Baughman, Jan E., Wigginton, Jon, Abdallah, Rehab, Ross, Ashley, Park, Jiwon, Grossenbacher, Steven, Luna, Jesus I., Withers, Sita, Culp, William, Chen, Mingyi, Monjazeb, Arta, Kent, Michael S., Chandran, Smita, Danforth, David, Yang, James, Klebanoff, Christopher, Goff, Stephanie, Paria, Biman, Sabesan, Arvind, Srivastava, Abhishek, Kammula, Udai, Richards, Jon, Faries, Mark, Andtbacka, Robert H. I., Diaz, Luis A., Le, Dung T., Yoshino, Takayuki, André, Thierry, Bendell, Johanna, Koshiji, Minori, Zhang, Yayan, Kang, S Peter, Lam, Bao, Jäger, Dirk, Bauer, Todd M., Wang, Judy S., Lee, Jean K., Manji, Gulam A., Kudchadkar, Ragini, Kauh, John S., Tang, Shande, Laing, Naomi, Falchook, Gerald, Garon, Edward B., Halmos, Balazs, Rina, Hui, Leighl, Natasha, Lee, Sung Sook, Walsh, William, Dragnev, Konstanin, Piperdi, Bilal, Rodriguez, Luis Paz-Ares, Shinwari, Nabeegha, Wei, Ziewn, Maas, Mary L, Deeds, Michael, Armstrong, Adam, Peterson, Tim, Steinmetz, Sue, Herzog, Thomas, Backes, Floor J., Copeland, Larry, Del Pilar Estevez Diz, Maria, Hare, Thomas W., Huh, Warner, Kim, Byoung-Gie, Moore, Kathleen M., Oaknin, Ana, Small, William, Tewari, Krishnansu S., Monk, Bradley J., Kamat, Ashish M., Nam, Kijoeng, De Santis, Maria, Dreicer, Robert, Hahn, Noah M., Perini, Rodolfo, Siefker-Radtke, Arlene, Sonpavde, Guru, de Wit, Ronald, Witjes, J. Alfred, Keefe, Stephen, Bajorin, Dean, Armand, Philippe, Kuruvilla, John, Moskowitz, Craig, Hamadani, Mehdi, Zinzani, Pier Luigi, Chlosta, Sabine, Bartlett, Nancy, Sabado, Rachel, Saenger, Yvonne, William, Loging, Donovan, Michael Joseph, Sacris, Erlinda, Mandeli, John, Salazar, Andres M., Powderly, John, Brody, Joshua, Nemunaitis, John, Emens, Leisha, Patnaik, Amita, McCaffery, Ian, Miller, Richard, Laport, Ginna, Coveler, Andrew L., Smith, David C., Grilley-Olson, Juneko E., Goel, Sanjay, Gardai, Shyra J., Law, Che-Leung, Means, Gary, Manley, Thomas, Marrone, Kristen A., Rosner, Gary, Anagnostou, Valsamo, Riemer, Joanne, Wakefield, Jessica, Zanhow, Cynthia, Baylin, Stephen, Gitlitz, Barbara, Brahmer, Julie, Li, Wenting, Schloss, Charles, Michot, Jean-Marie, Ding, Wei, Christian, Beth, Marinello, Patricia, Shipp, Margaret, Najjar, Yana G., Lin, Butterfield, Lisa H., Tarhini, Ahmad A., Davar, Diwakar, Zarour, Hassane, Rush, Elizabeth, Sander, Cindy, Fu, Siqing, Bauer, Todd, Molineaux, Chris, Bennett, Mark K., Orford, Keith W., Papadopoulos, Kyriakos P., Padda, Sukhmani K., Shah, Sumit A., Colevas, A Dimitrios, Narayanan, Sujata, Fisher, George A., Supan, Dana, Wakelee, Heather A., Aoki, Rhonda, Pegram, Mark D., Villalobos, Victor M., Liu, Jie, Takimoto, Chris H., Chao, Mark, Volkmer, Jens-Peter, Majeti, Ravindra, Weissman, Irving L., Sikic, Branimir I., Yu, Wendy, Conlin, Alison, Ruzich, Janet, Lewis, Stacy, Acheson, Anupama, Kemmer, Kathleen, Perlewitz, Kelly, Moxon, Nicole M., Mellinger, Staci, McArthur, Heather, Juhler-Nøttrup, Trine, Desai, Jayesh, Markman, Ben, Sandhu, Shahneen, Gan, Hui, Friedlander, Michael L., Tran, Ben, Meniawy, Tarek, Lundy, Joanne, Colyer, Duncan, Ameratunga, Malaka, Norris, Christie, Yang, Jason, Li, Kang, Wang, Lai, Luo, Lusong, Qin, Zhen, Mu, Song, Tan, Xuemei, Song, James, Millward, Michael, Katz, Matthew H. G., Bauer, Todd W., Varadhachary, Gauri R., Acquavella, Nicolas, Merchant, Nipun, Petroni, Gina, Rahma, Osama E., Chen, Mei, Song, Yang, Puhlmann, Markus, Khattri, Arun, Brisson, Ryan, Harvey, Christopher, Shah, Jatin, Mateos, Maria Victoria, Matsumoto, Morio, Blacklock, Hilary, Rocafiguera, Albert Oriol, Goldschmidt, Hartmut, Iida, Shinsuke, Yehuda, Dina Ben, Ocio, Enrique, Rodríguez-Otero, Paula, Jagannath, Sundar, Lonial, Sagar, Kher, Uma, San-Miguel, Jesus, de Oliveira, Moacyr Ribeiro, Yimer, Habte, Rifkin, Robert, Schjesvold, Fredrik, Ghori, Razi, Spreafico, Anna, Lee, Victor, Ngan, Roger K. C., To, Ka Fai, Ahn, Myung Ju, Ng, Quan Sing, Lin, Jin-Ching, Swaby, Ramona F., Gause, Christine, Saraf, Sanatan, Chan, Anthony T. C., Lam, Elaine, Tannir, Nizar M., Meric-Bernstam, Funda, Gross, Matt, MacKinnon, Andy, Whiting, Sam, Voss, Martin, Yu, Evan Y., Albertini, Mark R., Ranheim, Erik A., Hank, Jacquelyn A., Zuleger, Cindy, McFarland, Thomas, Collins, Jennifer, Clements, Erin, Weber, Sharon, Weigel, Tracey, Neuman, Heather, Hartig, Greg, Mahvi, David, Henry, MaryBeth, Gan, Jacek, Yang, Richard, Carmichael, Lakeesha, Kim, KyungMann, Gillies, Stephen D., Sondel, Paul M., Subbiah, Vivek, Noffsinger, Lori, Hendricks, Kyle, Bosch, Marnix, Lee, Jay M., Lee, Mi-Heon, Goldman, Jonathan W., Baratelli, Felicita E., Schaue, Dorthe, Wang, Gerald, Rosen, Frances, Yanagawa, Jane, Walser, Tonya C., Lin, Ying Q., Adams, Sharon, Marincola, Franco M., Tumeh, Paul C., Abtin, Fereidoun, Suh, Robert, Reckamp, Karen, Wallace, William D., Zeng, Gang, Elashoff, David A., Sharma, Sherven, Dubinett, Steven M., Pavlick, Anna C., Gastman, Brian, Hanks, Brent, Keler, Tibor, Davis, Tom, Vitale, Laura A., Sharon, Elad, Morishima, Chihiro, Cheever, Martin, Heery, Christopher R., Kim, Joseph W., Lamping, Elizabeth, Marte, Jennifer, McMahon, Sheri, Cordes, Lisa, Fakhrejahani, Farhad, Madan, Ravi, Salazar, Rachel, Zhang, Maggie, Helwig, Christoph, Gulley, James L, Li, Roger, Amrhein, John, Cohen, Zvi, Champagne, Monique, Kamat, Ashish, Aznar, M. Angela, Labiano, Sara, Diaz-Lagares, Angel, Esteller, Manel, Sandoval, Juan, Barbee, Susannah D., Bellovin, David I., Timmer, John C., Wondyfraw, Nebiyu, Johnson, Susan, Park, Johanna, Chen, Amanda, Mkrtichyan, Mikayel, Razai, Amir S., Jones, Kyle S., Hata, Chelsie Y., Gonzalez, Denise, Deveraux, Quinn, Eckelman, Brendan P., Borges, Luis, Bhardwaj, Rukmini, Puri, Raj K., Suzuki, Akiko, Leland, Pamela, Joshi, Bharat H., Bartkowiak, Todd, Jaiswal, Ashvin, Ager, Casey, Ai, Midan, Budhani, Pratha, Chin, Renee, Hong, David, Curran, Michael, Hastings, William D., Pinzon-Ortiz, Maria, Murakami, Masato, Dobson, Jason R., Quinn, David, Wagner, Joel P., Rong, Xianhui, Shaw, Pamela, Dammassa, Ernesta, Guan, Wei, Dranoff, Glenn, Cao, Alexander, Fulton, Ross B., Leonardo, Steven, Fraser, Kathryn, Kangas, Takashi O., Ottoson, Nadine, Bose, Nandita, Huhn, Richard D., Graff, Jeremy, Lowe, Jamie, Gorden, Keith, Uhlik, Mark, O’Neill, Thomas, Widger, Jenifer, Crocker, Andrea, He, Li-Zhen, Weidlick, Jeffrey, Sundarapandiyan, Karuna, Ramakrishna, Venky, Storey, James, Thomas, Lawrence J., Goldstein, Joel, Marsh, Henry C., Grailer, Jamison, Gilden, Julia, Stecha, Pete, Garvin, Denise, Hartnett, Jim, Fan, Frank, Cong, Mei, Cheng, Zhi-jie Jey, Hinner, Marlon J., Aiba, Rachida-Siham Bel, Schlosser, Corinna, Jaquin, Thomas, Allersdorfer, Andrea, Berger, Sven, Wiedenmann, Alexander, Matschiner, Gabriele, Schüler, Julia, Moebius, Ulrich, Rothe, Christine, Shane, Olwill A., Horton, Brendan, Spranger, Stefani, Moreira, Dayson, Adamus, Tomasz, Zhao, Xingli, Swiderski, Piotr, Pal, Sumanta, Kortylewski, Marcin, Kosmides, Alyssa, Necochea, Kevin, Shukla, Sachet A., Patsoukis, Nikolaos, Chaudhri, Apoorvi, Pham, Hung, Hua, Ping, Bu, Xia, Zhu, Baogong, Hacohen, Nir, Wu, Catherine J., Fritsch, Edward, Freeman, Gordon J., Moran, Amy E., Polesso, Fanny, Lukaesko, Lisa, Rådestad, Emelie, Egevad, Lars, Sundberg, Berit, Henningsohn, Lars, Levitsky, Victor, Rafelson, William, Reagan, John L., Fast, Loren, Sasikumar, Pottayil, Sudarshan, Naremaddepalli, Ramachandra, Raghuveer, Gowda, Nagesh, Samiulla, Dodheri, Chandrasekhar, Talapaneni, Adurthi, Sreenivas, Mani, Jiju, Nair, Rashmi, Dhudashia, Amit, Gowda, Nagaraj, Ramachandra, Murali, Sankin, Alexander, Gartrell, Benjamin, Cumberbatch, Kerwin, Huang, Hongying, Stern, Joshua, Schoenberg, Mark, Zang, Xingxing, Swanson, Ryan, Kornacker, Michael, Evans, Lawrence, Rickel, Erika, Wolfson, Martin, Valsesia-Wittmann, Sandrine, Shekarian, Tala, Simard, François, Nailo, Rodrigo, Dutour, Aurélie, Jallas, Anne-Catherine, Caux, Christophe, Marabelle, Aurélien, Sullivan, Ryan, McDermott, David, Arora, Kshitij S., Desai, Niyati, Kulkarni, Anupriya, Rajurkar, Mihir, Rivera, Miguel, Deshpande, Vikram, Bellmunt, Joaquim, Yee, Andrew, Raje, Noopur, Choueiri, Toni, Signoretti, Sabina, Mahoney, Kathleen, and Boussiotis, Vassiliki

Abstract

Version of Record

Published
2016
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12. FS118, a Bispecific Antibody Targeting LAG-3 and PD-L1, Enhances T-Cell Activation Resulting in Potent Antitumor Activity.

Author

Kraman M, Faroudi M, Allen NL, Kmiecik K, Gliddon D, Seal C, Koers A, Wydro MM, Batey S, Winnewisser J, Young L, Tuna M, Doody J, Morrow M, and Brewis N

Subjects
Animals, Antibody Affinity, Biomarkers, Tumor, Cell Line, Tumor, Disease Models, Animal, Humans, Immunophenotyping, Lymphocyte Activation immunology, Mice, Protein Binding, T-Lymphocytes immunology, Xenograft Model Antitumor Assays, Lymphocyte Activation Gene 3 Protein, Antibodies, Bispecific pharmacology, Antigens, CD metabolism, Antineoplastic Agents, Immunological pharmacology, B7-H1 Antigen antagonists & inhibitors, Lymphocyte Activation drug effects, T-Lymphocytes drug effects, T-Lymphocytes metabolism
Abstract

Purpose: Although programmed death-ligand 1 (PD-L1) antibody-based therapy has improved the outcome of patients with cancer, acquired resistance to these treatments limits their clinical efficacy. FS118 is a novel bispecific, tetravalent antibody (mAb 2 ) against human lymphocyte activation gene-3 (LAG-3) and PD-L1 with the potential to reinvigorate exhausted immune cells and overcome resistance mechanisms to PD-L1 blockade. Here, using FS118 and a murine surrogate, we characterized the activity and report a novel mechanism of action of this bispecific antibody., Experimental Design: This study characterizes the binding activity and immune function of FS118 in cell lines and human peripheral blood mononuclear cells and further investigates its antitumor activity and mechanism of action using a surrogate murine bispecific antibody (mLAG-3/PD-L1 mAb 2 )., Results: FS118 demonstrated simultaneous binding to LAG-3 and PD-L1 with high affinity and comparable or better activity than the combination of the single component parts of the mAb 2 in blocking LAG-3- and PD-L1-mediated immune suppression and enhancing T-cell activity. In syngeneic tumor mouse models, mLAG-3/PD-L1 mAb 2 significantly suppressed tumor growth. Mechanistic studies revealed decreased LAG-3 expression on T cells following treatment with the mouse surrogate mLAG-3/PD-L1 mAb 2 , whereas LAG-3 expression increased upon treatment with the combination of mAbs targeting LAG-3 and PD-L1. Moreover, following binding of mLAG-3/PD-L1 mAb 2 to target-expressing cells, mouse LAG-3 is rapidly shed into the blood., Conclusions: This study demonstrates a novel benefit of the bispecific approach over a combination of mAbs and supports the further development of FS118 for the treatment of patients with cancer., (©2020 American Association for Cancer Research.)

Published
2020
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13. Cutting edge: T lymphocyte activation by repeated immunological synapse formation and intermittent signaling.

Author

Faroudi M, Zaru R, Paulet P, Müller S, and Valitutti S

Subjects
Antigen Presentation immunology, Antigen-Presenting Cells immunology, Cell Line, Transformed, Clone Cells, Enzyme Inhibitors pharmacology, Flow Cytometry, Humans, Interferon-gamma biosynthesis, Pyrimidines pharmacology, Receptors, Antigen, T-Cell antagonists & inhibitors, Receptors, Antigen, T-Cell physiology, T-Lymphocytes metabolism, Time Factors, src-Family Kinases antagonists & inhibitors, Cell Communication immunology, Lymphocyte Activation immunology, Signal Transduction immunology, T-Lymphocytes immunology
Abstract

The activation of biological T cell responses requires prolonged contact with APCs and sustained signaling. We investigated whether signaling must be uninterrupted to commit T cells to cytokine production or whether T cell activation may also result from summation of interrupted signals. Upon periodic addition and removal of a src kinase inhibitor, human CD4(+) T cells destroyed and re-formed immunological synapses while aborting and restarting signal transduction. Remarkably, under these conditions, T cells were eventually activated to IFN-gamma production and the amount of IFN-gamma produced was directly related to the total signaling time despite the repeated interruptions. Our results illustrate that T cell activation does not require a stable immunological synapse and can be achieved by interrupted signaling. It is implied that T cells can add activation signals, possibly collected on multiple APCs.

Published
2003
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14. New insights to the functional role of the T cell-antigen presenting cell immunological synapse.

Author

Faroudi M, Zaru R, Favier B, and Valitutti S

Subjects
Animals, Humans, Microscopy, Confocal methods, T-Lymphocytes, Cytotoxic physiology, Antigen-Presenting Cells physiology, CD4-Positive T-Lymphocytes physiology, CD8-Positive T-Lymphocytes physiology, Receptors, Antigen, T-Cell physiology, Signal Transduction
Abstract

Three innovative and complementary morphological approaches were employed to study the T cell/antigen presenting cell (APC) interaction: (i) high resolution three-dimensional confocal microscopy of the T cell-APC contact site; (ii) time lapse video recording in living T cells of [Ca2+]I and changes in distribution of various GFP fusion proteins with TCR/CD3-zeta complex associated- and other signaling components; (iii) measurement of lateral TCR mobility and that of recruited signaling components using techniques based on fluorescence recovery after photo-bleaching. These approaches were combined with biochemical and functional experiments to investigate two principal issues: (A) Recruitment and the three-dimensional arrangement of receptors and signaling components at the contact site between human CD4+ T lymphocytes and APCs, (B) Structure of the immunological synapse formed at the contact site between cytotoxic T lymphocytes (CTLs) and target cells. We discuss evidence indicating that TCR engagement and triggering can occur in the absence of large-scale molecular segregation into the T cell-APC contact site. Taken together our results indicate that although not required for TCR engagement and triggering, formation of the IS is important to reinforce TCR-mediated signal transduction and achieve full T cell activation.

Published
2002
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