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Your search keyword '"Gabriele Matschiner"' showing total 11 results
Start Over Author "Gabriele Matschiner" Topic cancer research
11 results on '"Gabriele Matschiner"'

1. Tumor-Localized Costimulatory T-Cell Engagement by the 4-1BB/HER2 Bispecific Antibody-Anticalin Fusion PRS-343

Author

Manuela Carola Dürr, Sven Berger, Alexander Wiedenmann, Christine Rothe, Rachida Siham Bel Aiba, Ulrich Moebius, Corinna Schlosser, Marlon Hinner, Julia Schüler, Gabriele Matschiner, Louis Matis, Andrea Allersdorfer, Shane Olwill, and Thomas Jaquin

Subjects
0301 basic medicine, Cancer Research, T cell, T-Lymphocytes, Lymphocyte Activation, Proinflammatory cytokine, 03 medical and health sciences, Mice, Tumor Necrosis Factor Receptor Superfamily, Member 9, 0302 clinical medicine, Immune system, Lymphocytes, Tumor-Infiltrating, Neoplasms, Antibodies, Bispecific, medicine, Animals, Humans, biology, Chemistry, CD137, 030104 developmental biology, medicine.anatomical_structure, Oncology, 030220 oncology & carcinogenesis, Cancer cell, Humanized mouse, biology.protein, Cancer research, Antibody, Ex vivo
Abstract

Purpose: 4-1BB (CD137) is a key costimulatory immunoreceptor and promising therapeutic target in cancer. To overcome limitations of current 4-1BB–targeting antibodies, we have developed PRS-343, a 4-1BB/HER2 bispecific molecule. PRS-343 is designed to facilitate T-cell costimulation by tumor-localized, HER2-dependent 4-1BB clustering and activation. Experimental Design: PRS-343 was generated by the genetic fusion of 4-1BB–specific Anticalin proteins to a variant of trastuzumab with an engineered IgG4 isotype. Its activity was characterized using a panel of in vitro assays and humanized mouse models. The safety was assessed using ex vivo human cell assays and a toxicity study in cynomolgus monkeys. Results: PRS-343 targets 4-1BB and HER2 with high affinity and binds both targets simultaneously. 4-1BB–expressing T cells are efficiently costimulated when incubated with PRS-343 in the presence of cancer cells expressing HER2, as evidenced by increased production of proinflammatory cytokines (IL2, GM-CSF, TNFα, and IFNγ). In a humanized mouse model engrafted with HER2-positive SK-OV-3 tumor cells and human peripheral blood mononuclear cells, PRS-343 leads to tumor growth inhibition and a dose-dependent increase of tumor-infiltrating lymphocytes. In IND-enabling studies, PRS-343 was found to be well tolerated, with no overt toxicity and no relevant drug-related toxicologic findings. Conclusions: PRS-343 facilitates tumor-localized targeting of T cells by bispecific engagement of HER2 and 4-1BB. This approach has the potential to provide a more localized activation of the immune system with higher efficacy and reduced peripheral toxicity compared with current monospecific approaches. The reported data led to initiation of a phase I clinical trial with this first-in-class molecule. See related commentary by Su et al., p. 5732

Published
2018

2. 31st Annual Meeting and Associated Programs of the Society for Immunotherapy of Cancer (SITC 2016): part one

Author

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

Subjects
Pharmacology, 0303 health sciences, Cancer Research, Side effect, business.industry, medicine.drug_class, Immunology, Phases of clinical research, Monoclonal antibody, Phase i study, Clinical trial, 03 medical and health sciences, 0302 clinical medicine, Oncology, Pharmacokinetics, 030220 oncology & carcinogenesis, Molecular Medicine, Immunology and Allergy, Medicine, In patient, Programmed death 1, business, 030304 developmental biology
Published
2016

3. Costimulatory T-cell engagement by PRS-343, a CD137 (4-1BB)/HER2 bispecific, leads to tumor growth inhibition and TIL expansion in a humanized mouse model

Author

Thomas Jaquin, Gabriele Matschiner, Julia Schüler, R.S. Bel Aiba, Corinna Schlosser, Shane A. Olwill, Andrea Allersdorfer, Sven Berger, Ulrich Moebius, Christine Rothe, Alexander Wiedenmann, and Marlon Hinner

Subjects
0301 basic medicine, Cancer Research, business.industry, T cell, CD137, 03 medical and health sciences, 030104 developmental biology, 0302 clinical medicine, medicine.anatomical_structure, Oncology, 030220 oncology & carcinogenesis, Humanized mouse, Immunology, Cancer research, Medicine, Tumor growth inhibition, business
Published
2016

4. A highly potent and specific MET therapeutic protein antagonist with both ligand-dependent and ligand-independent activity

Author

Laurent P. Audoly, Stefan Trentmann, Jakub Jaworski, Shane A. Olwill, Christian Joffroy, Andreas Hohlbaum, Cristina Chiriaco, Martin Hülsmeyer, Kristian Jensen, James F. Burrows, Gabriele Matschiner, Hans Jürgen Christian, Andrea Allersdorfer, Bradley Lunde, Elisa Vigna, and Hendrik Gille

Subjects
Cancer Research, Mice, Nude, CHO Cells, Biology, Pharmacology, Ligands, Mice, Cricetulus, In vivo, Cell Line, Tumor, medicine, Human Umbilical Vein Endothelial Cells, Animals, Humans, Amino Acid Sequence, Receptor, Protein Kinase Inhibitors, Mice, Inbred BALB C, Binding Sites, Dose-Response Relationship, Drug, Hepatocyte Growth Factor, Antagonist, Cancer, Proteins, Neoplasms, Experimental, Proto-Oncogene Proteins c-met, medicine.disease, Ligand (biochemistry), Xenograft Model Antitumor Assays, Lipocalins, Oncology, Mechanism of action, Phosphorylation, Hepatocyte growth factor, Female, medicine.symptom, HT29 Cells, Epitope Mapping, medicine.drug, Signal Transduction
Abstract

Activation of the MET oncogenic pathway has been implicated in the development of aggressive cancers that are difficult to treat with current chemotherapies. This has led to an increased interest in developing novel therapies that target the MET pathway. However, most existing drug modalities are confounded by their inability to specifically target and/or antagonize this pathway. Anticalins, a novel class of monovalent small biologics, are hypothesized to be “fit for purpose” for developing highly specific and potent antagonists of cancer pathways. Here, we describe a monovalent full MET antagonist, PRS-110, displaying efficacy in both ligand-dependent and ligand-independent cancer models. PRS-110 specifically binds to MET with high affinity and blocks hepatocyte growth factor (HGF) interaction. Phosphorylation assays show that PRS-110 efficiently inhibits HGF-mediated signaling of MET receptor and has no agonistic activity. Confocal microscopy shows that PRS-110 results in the trafficking of MET to late endosomal/lysosomal compartments in the absence of HGF. In vivo administration of PRS-110 resulted in significant, dose-dependent tumor growth inhibition in ligand-dependent (U87-MG) and ligand-independent (Caki-1) xenograft models. Analysis of MET protein levels on xenograft biopsy samples show a significant reduction in total MET following therapy with PRS-110 supporting its ligand-independent mechanism of action. Taken together, these data indicate that the MET inhibitor PRS-110 has potentially broad anticancer activity that warrants evaluation in patients. Mol Cancer Ther; 12(11); 2459–71. ©2013 AACR . This article is featured in Highlights of This Issue, [p. 2283][1] [1]: /lookup/volpage/12/2283?iss=11

Published
2013

5. Abstract B016: Costimulatory T-cell engagement by PRS-343, a CD137 (4-1BB)/HER2 bispecific, leads to tumor growth inhibition and TIL expansion in humanized mouse model

Author

Julia Schüler, Ulrich Moebius, Alexander Wiedenmann, Shane Olwill, Marlon Hinner, Corinna Schlosser, Sven Berger, Rachida-Siham Bel Aiba, Christine Rothe, Thomas Jaquin, Gabriele Matschiner, and Andrea Allersdorfer

Subjects
Antibody-dependent cell-mediated cytotoxicity, Cancer Research, medicine.drug_class, medicine.medical_treatment, T cell, Immunology, CD137, 02 engineering and technology, Biology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Monoclonal antibody, 01 natural sciences, 0104 chemical sciences, Immune system, medicine.anatomical_structure, Cancer immunotherapy, Humanized mouse, Cancer research, medicine, 0210 nano-technology, CD8
Abstract

Background: CD137 (4-1BB) is a key costimulatory immunoreceptor and a member of the TNF-receptor (TNFR) superfamily. While multiple lines of evidence show that CD137 is a highly promising therapeutic target in cancer, current mAb-based approaches are not designed to achieve a tumor-target driven activation and may display toxicity and a limited therapeutic window due to peripheral T cell and NK cell activation. To overcome this limitation, we generated PRS-343, a CD137/HER2 bispecific that is designed to promote CD137 clustering by bridging CD137-positive T cells with HER2-positive tumor cells, thereby providing a potent costimulatory signal to tumor antigen-specific T cells. Methods: Anticalin® proteins are 18 kD protein therapeutics derived from human lipocalins. We utilized phage display to generate an Anticalin protein binding to CD137 with high affinity and specificity. PRS-343 was obtained by genetic fusion of the CD137-specific Anticalin protein to a variant of the HER2-targeting monoclonal antibody trastuzumab with an engineered IgG4 backbone. We have shown previously that the bispecific fusion PRS-343 targets CD137 and HER2 in a bispecific manner and efficiently activates T cells ex vivo in the presence of HER2-positive cells. Here, in vivo proof of concept data is presented utilizing a humanized mouse model in immunocompromised mice and the SK-OV-3 cell line as a HER2-positive xenograft. When tumors had reached a predefined size, mice received human PBMC via an intravenous route and weekly intraperitoneal injections of PRS-343 for three weeks. An IgG4 isotype antibody served as the negative control, while a CD137-targeting benchmark antibody and trastuzumab with an engineered IgG4 backbone (“tras-IgG4”) served as controls for monospecific targeting of CD137 and HER2, respectively. Results: PRS-343 activity was investigated at four different weekly doses of PRS-343 (4μg, 20μg, 100μg and 200μg). We found that PRS-343 dose-dependently led to strong tumor growth inhibition compared to treatment with the isotype control, and that the tumor response was accompanied by a significantly higher tumor infiltration with human lymphocytes (hCD45+). Interestingly, the anti-CD137 benchmark neither displayed tumor growth inhibition nor enhanced lymphocyte infiltration into tumors compared to isotype. The tras-IgG4 control was also devoid of lymphocyte infiltration into the tumor, but displayed a tumor growth inhibition comparable to PRS-343. Taken together, these data show that PRS-343 provided dual activity by both increasing the frequency of tumor-infiltrating lymphocytes by bispecific targeting of CD137 and HER2 as well as mediating direct tumor growth inhibition by the direct, monospecific targeting of HER2. Notably, the tumor growth inhibition provided by targeting HER2 did not require any antibody directed cellular cytotoxicity (ADCC) as both PRS-343 and the tras-IgG4 control lack the ability to interact with Fc-gamma receptors on NK cells that ADCC would require. The animal model also allowed investigating the potential safety of PRS-343: While the anti-CD137 benchmark accelerated the onset of graft-versus-host-disease and led to stronger expansion of CD8+ T cells in the peripheral blood compared to the isotype control group, both of these effects were absent for PRS-343. The data therefore support the envisaged mode of action of selective, tumor-localized costimulatory T cell activation, as well as the concept that such an approach may lead to higher efficacy and reduced systemic toxicity compared to conventional anti-CD137 mAbs. Conclusion: We report potent costimulatory T-cell engagement of the immunoreceptor CD137 in a HER2-dependent manner, utilizing the CD137/HER2 bispecific PRS-343. In a humanized mouse model, PRS-343 displays dual activity based on monospecific HER2-targeting and bispecific, tumor-localized costimulation of CD137. Compared to known CD137-targeting antibodies in clinical development, this approach has the potential to provide a more localized activation of the immune system with higher efficacy and reduced peripheral toxicity. The direct, monospecific HER2-targeting activity may provide an additional therapeutic benefit and work in synergy with local CD137 costimulation. The positive functional ex vivo and in vivo data of PRS-343 as well as the excellent developability profile support investigation of its anti-cancer activity in clinical trials. Citation Format: Marlon J. Hinner, Rachida-Siham Bel Aiba, Corinna Schlosser, Thomas Jaquin, Andrea Allersdorfer, Sven Berger, Alexander Wiedenmann, Gabriele Matschiner, Julia Schüler, Ulrich Moebius, Christine Rothe, Shane A. Olwill. Costimulatory T-cell engagement by PRS-343, a CD137 (4-1BB)/HER2 bispecific, leads to tumor growth inhibition and TIL expansion in humanized mouse model [abstract]. In: Proceedings of the Second CRI-CIMT-EATI-AACR International Cancer Immunotherapy Conference: Translating Science into Survival; 2016 Sept 25-28; New York, NY. Philadelphia (PA): AACR; Cancer Immunol Res 2016;4(11 Suppl):Abstract nr B016.

Published
2016

6. Abstract 556: Costimulatory T-cell engagement by the HER2/CD137 bispecific PRS-343 leads to strong antitumor effect in humanized mouse model

Author

Gabriele Matschiner, Corinna Schlosser, Sven Berger, Marlon Hinner, Ulrich Moebius, Christine Rothe, Alexander Wiedenmann, Andrea Allersdorfer, Rachida-Siham Bel Aiba, and Shane Olwill

Subjects
0301 basic medicine, Cancer Research, Chemistry, medicine.drug_class, T cell, CD137, Monoclonal antibody, 03 medical and health sciences, 030104 developmental biology, 0302 clinical medicine, Immune system, medicine.anatomical_structure, Oncology, In vivo, 030220 oncology & carcinogenesis, Humanized mouse, Immunology, Cancer research, medicine, Ex vivo, Anticalin
Abstract

Background. CD137 (4-1BB) is a key costimulatory immunoreceptor and a member of the TNF-receptor (TNFR) superfamily. While multiple lines of evidence show that CD137 is a highly promising therapeutic target in cancer, current mAb-based approaches are not designed to achieve a tumor-target driven activation and may display toxicity and a limited therapeutic window due to peripheral T cell and NK cell activation. To overcome this limitation, we generated PRS-343, a HER2/CD137 bispecific that is designed to promote CD137 clustering by bridging CD137-positive T cells with HER2-positive tumor cells, thereby providing a potent costimulatory signal to tumor antigen-specific T cells. Methods. Anticalin® proteins are 18 kD protein therapeutics derived from human lipocalins. We utilized phage display to generate an Anticalin protein binding to CD137 with high affinity and specificity. PRS-343 was obtained by genetic fusion of the CD137-specific Anticalin protein to a variant of the HER2-targeting monoclonal antibody trastuzumab with an engineered IgG4 backbone. Results. The bispecific fusion PRS-343 targets CD137 and HER2 with nearly identical affinities compared to the parental building blocks, and is capable of binding both targets simultaneously. We show ex vivo that T cells are efficiently activated when incubated with PRS-343 and HER2-positive cells, and that the activation is HER2-dependent. The in vivo activity of PRS-343 was investigated utilizing a humanized mouse model with a tumor cell-line-derived, HER2-positive xenograft. When tumors had reached a predefined size, mice received human PBMC via an intravenous route and weekly intraperitoneal injections of PRS-343 or controls for three weeks. We found that PRS-343 led to strong tumor growth inhibition and a significantly better response compared to either isotype control or anti-CD137 benchmark mAbs. The data, which include phenotyping of peripheral and intra-tumoral lymphocytes, support the envisaged mode of action of tumor-localized costimulatory T cell activation. Conclusion. We report potent costimulatory T-cell engagement of the immunoreceptor CD137 in a HER2-dependent manner, utilizing the HER2/CD137 bispecific PRS-343. Compared to known CD137-targeting antibodies in clinical development, this approach has the potential to provide a more localized activation of the immune system with higher efficacy and reduced peripheral toxicity. The positive functional ex vivo and in vivo data of PRS-343 as well as the excellent developability profile support investigation of its anti-cancer activity in clinical trials. Citation Format: Marlon J. Hinner, Rachida-Siham Bel Aiba, Corinna Schlosser, Alexander Wiedenmann, Andrea Allersdorfer, Gabriele Matschiner, Sven Berger, Ulrich Moebius, Christine Rothe, Shane A. Olwill. Costimulatory T-cell engagement by the HER2/CD137 bispecific PRS-343 leads to strong antitumor effect in humanized mouse model. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 556.

Published
2016

7. Abstract B023: Costimulatory T-cell engagement via a novel bispecific anti-CD137 /anti-HER2 protein based on Anticalin® technology

Author

Rachida-Siham Bel Aiba, Gabriele Matschiner, Marlon Hinner, Shane Olwill, Alexander Wiedenmann, Christine Rothe, Andrea Allersdorfer, Corinna Schlosser, and Ulrich Moebius

Subjects
Cancer Research, Phage display, business.industry, T cell, medicine.medical_treatment, Immunology, CD137, Plasma protein binding, medicine.anatomical_structure, Cancer immunotherapy, Cancer research, medicine, Receptor, business, Anticalin, CD8
Abstract

Background: CD137 is a potent costimulatory immunoreceptor and a member of the TNF-receptor (TNFR) superfamily. The receptor, also known as 4-1BB, is mainly expressed on activated CD4+ and CD8+ T cells, activated B cells, and natural killer (NK) cells. While multiple lines of evidence show that CD137 is a highly promising therapeutic target, current approaches are not designed to achieve a tumor-target driven activation, which may reduce the available therapeutic window via peripheral T cell activation and toxicity. To overcome this limitation, we applied Anticalin® technology to generate a bispecific protein therapeutic binding to CD137 and a differentially expressed tumor target, HER2. Methods: Anticalin® proteins are 18 kD protein therapeutics derived from human lipocalins which enable straight-forward multimeric drug targeting across several formats. We utilized phage display to generate an Anticalin protein binding to CD137 with high affinity and specificity. The CD137-specific Anticalin protein was genetically fused to a Trastuzumab variant, yielding four different constructs covering a range of distances between the binding sites of the T cell-target and the tumor cell target. To minimize Fc-receptor interaction of the resulting bispecific and concomitant potential toxicity towards CD137-positive cells, the backbone of Trastuzumab was switched from IgG1 to an engineered IgG4 isotype. Results: All four bispecific constructs bound the targets CD137 and HER2 with a nearly identical affinity compared to the parental building blocks, and both targets could be simultaneously bound. Compared to non-engineered Trastuzumab, binding to human receptors FcγRI and FcγRIII was significantly reduced, while binding to the neonatal Fc receptor (FcRn) was retained. Functional activity was demonstrated in human T cell activation assays, and shown to be tumor target (HER2) dependent. Conclusion: We report the first bispecific therapeutic protein that targets the potent costimulatory immunoreceptor CD137 in a tumor-target dependent manner, utilizing HER2 as the tumor target. Compared to currently existing CD137-targeting antibodies, this approach has the potential to provide a more localized activation of the immune system with reduced peripheral toxicity. Bispecific T cell engagers based on CD137 and HER2 may have utility in HER2-positive cancers where there is a significant unmet medical need, such as bladder, ovarian and gastric cancer. Citation Format: Marlon J. Hinner, Rachida-Siham Bel Aiba, Alexander Wiedenmann, Corinna Schlosser, Andrea Allersdorfer, Gabriele Matschiner, Christine Rothe, Ulrich Moebius, Shane A. Olwill. Costimulatory T-cell engagement via a novel bispecific anti-CD137 /anti-HER2 protein based on Anticalin® technology. [abstract]. In: Proceedings of the CRI-CIMT-EATI-AACR Inaugural International Cancer Immunotherapy Conference: Translating Science into Survival; September 16-19, 2015; New York, NY. Philadelphia (PA): AACR; Cancer Immunol Res 2016;4(1 Suppl):Abstract nr B023.

Published
2016

8. Abstract C205: Costimulatory T-cell engagement via a novel bispecific anti-CD137 /anti-HER2 protein

Author

Marlon Hinner, Gabriele Matschiner, Shane Olwill, Holbrook E Kohrt, Ulrich Moebius, Christine Rothe, Alexander Wiedenmann, Corinna Schlosser, Andrea Allersdorfer, and Rachida-Siham Bel Aiba

Subjects
Cancer Research, Tumor microenvironment, Phage display, T cell, CD137, Biology, Molecular biology, medicine.anatomical_structure, Oncology, Cancer research, medicine, biology.protein, Antibody, Receptor, Anticalin, CD8
Abstract

CD137 is a potent costimulatory immunoreceptor and a member of the TNF-receptor (TNFR) superfamily. The receptor, also known as 4-1BB, is mainly expressed on activated CD4+ and CD8+ T cells, activated B cells, and natural killer (NK) cells. While multiple lines of evidence show that CD137 is a highly promising therapeutic target, current approaches using monospecific antibodies may display a limited therapeutic window due to peripheral T cell and NK cell activation, leading to unwanted toxicity. To overcome this limitation, we have generated a bispecific protein therapeutic designed to achieve a tumor-target driven activation of immune cells via binding to CD137 and to a differentially expressed tumor target, HER2. Anticalin® proteins are 18 kD protein therapeutics derived from human lipocalins. Using phage display technology a CD137-specific Anticalin was identified. The Anticalin was recombinantly fused to a trastuzumab variant at either the C or N terminus of the antibody´s heavy or light chain, yielding four different constructs covering a range of distances between the binding sites of the T cell-target and the tumor cell target. To minimize Fcγ-receptor interaction of the resulting bispecific and concomitant potential toxicity towards CD137-positive cells, the backbone of trastuzumab was switched from IgG1 to an engineered IgG4 isotype. Using ELISA or cell-based assays it was shown that all bispecific constructs bound their targets CD137 and HER2 with similar affinity compared to the parental building blocks, and both targets could be simultaneously bound. Binding to human receptors FcγRI and FcγRIII was significantly reduced in the bispecific constructs compared to non-engineered trastuzumab, while binding to the neonatal Fc receptor (FcRn) was retained. All constructs were shown to have excellent drug-like properties including thermal stability and plasma stability. HER2-dependent agonistic engagement of CD137 was demonstrated in ex-vivo T-cell activation assays utilizing HER2-positive human cell lines. The functional activity of the bispecific constructs was found to be dependent on their geometry. In conclusion, we report the first bispecific therapeutic protein that targets the potent costimulatory immunoreceptor CD137 in a tumor-target dependent manner, utilizing HER2 as the tumor target. Compared to currently existing CD137-targeting antibodies, this approach has the potential to provide a more controlled activation of the immune system in the tumor microenvironment with reduced peripheral toxicity. Bispecific T-cell engagers based on CD137 and HER2 have potential utility in HER2-positive cancers where there is a significant unmet medical need. Citation Format: Marlon J. Hinner, Rachida-Siham Bel Aiba, Alexander Wiedenmann, Corinna Schlosser, Andrea Allersdorfer, Gabriele Matschiner, Christine Rothe, Ulrich Moebius, Holbrook E. Kohrt, Shane A. Olwill. Costimulatory T-cell engagement via a novel bispecific anti-CD137 /anti-HER2 protein. [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2015 Nov 5-9; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2015;14(12 Suppl 2):Abstract nr C205.

Published
2015

9. Costimulatory T cell engagement via a novel bispecific anti-CD137 /anti-HER2 protein

Author

Andrea Allersdorfer, Alexander Wiedenmann, Holbrook E Kohrt, Christine Rothe, Corinna Schlosser, Gabriele Matschiner, Shane Olwill, Marlon Hinner, Ulrich Moebius, and Rachida-Siham Bel Aiba

Subjects
Pharmacology, Cancer Research, business.industry, T cell, Immunology, CD137, chemical and pharmacologic phenomena, hemic and immune systems, SUPERFAMILY, Bioinformatics, Cell biology, medicine.anatomical_structure, Oncology, Poster Presentation, Molecular Medicine, Immunology and Allergy, Medicine, Anti her2, Receptor, business, Tumor necrosis factor receptor, CD8
Abstract

Meeting abstracts CD137 is a potent costimulatory immunoreceptor and a member of the TNF-receptor (TNFR) superfamily. The receptor, also known as 4-1BB, is mainly expressed on activated CD4+ and CD8+ T cells, activated B cells, and natural killer (NK) cells. While multiple lines of evidence show

Published
2015

10. Abstract 3875: Exploiting the Anticalin therapeutic protein platform for the treatment of cMet ligand-independent and dependent tumors - discovery and characterization of a highly specific and potent c-Met antagonist with drug-like properties

Author

Laurent P. Audoly, Rachida Siham Bel Aiba, Christian Joffroy, Hendrik Gille, Martin Hülsmeyer, Gabriele Matschiner, Hans-Jürgen Christian, Andreas Hohlbaum, Shane Olwill, Kristian Jensen, and Stefan Trentmann

Subjects
Cancer Research, C-Met, Cell growth, Chemistry, Antagonist, Pharmacology, chemistry.chemical_compound, Oncology, In vivo, medicine, Hepatocyte growth factor, Receptor, IC50, Anticalin, medicine.drug
Abstract

Background: Activation of the c-Met oncogenic pathway has been implicated in the development of aggressive cancers which are difficult to treat with current chemotherapies. Dimerization of c-Met receptor upon binding of Hepatocyte Growth Factor (HGF) leads to the stimulation of proliferative, migratory and survival pathways implicated in tumor development. Moreover it has recently been discovered that patients who become resistant / nonresponsive to therapies such as EGFR or VEGF inhibitors often show an enhanced c-Met expression. This has led to an increased interest in developing novel therapies that target the c-Met pathway. However, most existing drug modalities are confounded by their inability to specifically target and/or antagonize this pathway. Anticalins, a novel class of small biologics, are hypothesized to be ‘fit for purpose’ for developing highly specific and potent antagonists of cancer pathways. A monovalent Anticalin c-Met antagonist displaying efficacy in both ligand-dependent and independent cancer models has been developed. Methods/Results: Here we describe the in vitro and in vivo characterisation of the Anticalin c-Met antagonist PRS-110. In protein-based binding assays PRS-110 specifically binds to c-Met with high affinity and blocks HGF interaction (IC50 3.4 ± 0.7 nM). HUVEC cell proliferation assays demonstrated that PRS-110 efficiently antagonizes HGF-mediated growth. As a monovalent antagonist PRS-110 does not induce the c-Met pathway in the absence of ligand by receptor dimerization - an unwanted activation that can occur with bivalent antibodies. In mice, rats and non-human primates, PEGylated PRS-110 displayed favourable plasma elimination half-life profiles of 41 hours, 61 hours and 72 hours (T½α) respectively, with no signs of macrotoxicity. In vivo administration of PRS-110 resulted in significant, dose-dependent tumor growth inhibition in multiple xenograft models representative of ligand-dependent and ligand-independent c-Met activation. Analysis of c-Met protein levels on xenograft biopsy samples demonstrated a significant reduction in total c-Met (p Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 3875. doi:1538-7445.AM2012-3875

Published
2012

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