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1. Fc effector function contributes to the activity of human anti-CTLA-4 antibodies

Author

Arce Vargas, Frederick, Furness, Andrew J.S., Litchfield, Kevin, Joshi, Kroopa, Rosenthal, Rachel, Ghorani, Ehsan, Solomon, Isabelle, Lesko, Marta H., Ruef, Nora, Roddie, Claire, Henry, Jake Y., Spain, Lavinia, Ben Aissa, Assma, Georgiou, Andrew, Wong, Yien Ning Sophia, Smith, Myles, Strauss, Dirk, Hayes, Andrew, Nicol, David, O'Brien, Tim, Mårtensson, Linda, Ljungars, Anne, Teige, Ingrid, Frendéus, Björn, Pule, Martin, Marafioti, Teresa, Gore, Martin, Larkin, James, Turajlic, Samra, Swanton, Charles, Peggs, Karl S., Quezada, Sergio A., Harrington, Kevin, Melcher, Alan, Wotherspoon, Andrew, Francis, Nicholas, Challacombe, Ben, Fernando, Archana, Hazell, Steve, Chandra, Ashish, Pickering, Lisa, Lynch, Joanna, Rudman, Sarah, Chowdhury, Simon, Harrison-Phipps, Karen, Varia, Mary, Horsfield, Catherine, Polson, Alexander, Stamp, Gordon, O'Donnell, Marie, Drake, William, Hill, Peter, Hrouda, David, Mayer, Eric, Olsburgh, Jonathan, Kooiman, Gordon, O'Connor, Kevin, Stewart, Grant, Aitchison, Michael, Tran, Maxine, Fotiadis, Nicos, Verma, Hema, Lopez, Jose, Lester, Jason, Morgan, Fiona, Kornaszewska, Malgorzata, Attanoos, Richard, Adams, Haydn, Davies, Helen, Fennell, Dean, Shaw, Jacqui, Le Quesne, John, Nakas, Apostolos, Rathinam, Sridhar, Monteiro, William, Marshall, Hilary, Nelson, Louise, Bennett, Jonathan, Riley, Joan, Primrose, Lindsay, Martinson, Luke, Anand, Girija, Khan, Sajid, Nicolson, Marianne, Kerr, Keith, Palmer, Shirley, Remmen, Hardy, Miller, Joy, Buchan, Keith, Chetty, Mahendran, Gomersall, Lesley, Lock, Sara, Naidu, Babu, Langman, Gerald, Trotter, Simon, Bellamy, Mary, Bancroft, Hollie, Kerr, Amy, Kadiri, Salma, Webb, Joanne, Middleton, Gary, Djearaman, Madava, Summers, Yvonne, Califano, Raffaele, Taylor, Paul, Shah, Rajesh, Krysiak, Piotr, Rammohan, Kendadai, Fontaine, Eustace, Booton, Richard, Evison, Matthew, Crosbie, Phil, Moss, Stuart, Idries, Faiza, Novasio, Juliette, Joseph, Leena, Bishop, Paul, Chaturvedi, Anshuman, Marie Quinn, Anne, Doran, Helen, leek, Angela, Harrison, Phil, Moore, Katrina, Waddington, Rachael, Blackhall, Fiona, Rogan, Jane, Smith, Elaine, Dive, Caroline, Brady, Ged, Rothwell, Dominic, Gulati, Sakshi, Chemie, Francesca, Tugwood, Jonathan, Pierce, Jackie, Lawrence, David, Hayward, Martin, Panagiotopoulos, Nikolaos, George, Robert, Patrini, Davide, Falzon, Mary, Borg, Elaine, Khiroya, Reena, Jamal-Hanjani, Mariam, Wilson, Gareth, Juul Birkbak, Nicolai, Watkins, Thomas, McGranahan, Nicholas, Abbosh, Christopher, Horswell, Stuart, Mitter, Richard, Escudero, Mickael, Stewart, Aengus, Rowan, Andrew, Hiley, Crispin, Goldman, Jacki, Ahmed, Asia, Taylor, Magali, Choudhary, Junaid, Shaw, Penny, Veeriah, Raju, Czyzewska-Khan, Justyna, Johnson, Diana, Laycock, Joanne, Hynds, Robert, Werner Sunderland, Mariana, Reading, James, Novelli, Marco, Oukrif, Dahmane, Janes, Sam, Forster, Martin, Ahmad, Tanya, Ming Lee, Siow, van Loo, Peter, Herrero, Javier, Hartley, John, Kevin Stone, Richard, Denner, Tamara, Costa, Marta, Begum, Sharmin, Phillimore, Ben, Chambers, Tim, Nye, Emma, Ward, Sophie, Elgar, Greg, Al-Bakir, Maise, Carnell, Dawn, Mendes, Ruheena, George, Jeremy, Navani, Neal, Papadatos-Pastos, Dionysis, Scarci, Marco, Gorman, Pat, Lowe, Helen, Ensell, Leah, Moore, David, MacKenzie, Mairead, Wilcox, Maggie, Bell, Harriet, Hackshaw, Allan, Ngai, Yenting, Smith, Sean, Gower, Nicole, Ottensmeier, Christian, Chee, Serena, Johnson, Benjamin, Alzetani, Aiman, Shaw, Emily, Lim, Eric, De Sousa, Paulo, Tavares Barbosa, Monica, Nicholson, Andrew, Bowman, Alex, Jordan, Simon, Rice, Alexandra, Raubenheimer, Hilgardt, Proli, Chiara, Elena Cufari, Maria, Carlo Ronquillo, John, Kwayie, Angela, Bhayani, Harshil, Hamilton, Morag, Bakar, Yusura, Mensah, Natalie, Ambrose, Lyn, Devaraj, Anand, Buderi, Silviu, Finch, Jonathan, Azcarate, Leire, Chavan, Hema, Green, Sophie, Mashinga, Hillaria, Lau, Kelvin, Sheaff, Michael, Schmid, Peter, Conibear, John, Ezhil, Veni, Prakash, Vineet, Danson, Sarah, Bury, Jonathan, Edwards, John, Hill, Jennifer, Matthews, Sue, Kitsanta, Yota, Suvarna, Kim, Shackcloth, Michael, Gosney, John, Postmus, Pieter, Feeney, Sarah, Asante-Siaw, Julius, Russell, Peter, Light, Teresa, Horey, Tracey, Blyth, Kevin, Dick, Craig, and Kirk, Alan

Abstract

With the use of a mouse model expressing human Fc-gamma receptors (FcγRs), we demonstrated that antibodies with isotypes equivalent to ipilimumab and tremelimumab mediate intra-tumoral regulatory T (Treg) cell depletion in vivo, increasing the CD8+ to Treg cell ratio and promoting tumor rejection. Antibodies with improved FcγR binding profiles drove superior anti-tumor responses and survival. In patients with advanced melanoma, response to ipilimumab was associated with the CD16a-V158F high affinity polymorphism. Such activity only appeared relevant in the context of inflamed tumors, explaining the modest response rates observed in the clinical setting. Our data suggest that the activity of anti-CTLA-4 in inflamed tumors may be improved through enhancement of FcγR binding, whereas poorly infiltrated tumors will likely require combination approaches.

Published
2018

2. Fc-Optimized Anti-CD25 depletes tumor-infiltrating regulatory T Cells and synergizes with PD-1 Blockade to eradicate established tumors

Author

Arce Vargas, Frederick, Furness, Andrew J.S., Solomon, Isabelle, Joshi, Kroopa, Mekkaoui, Leila, Lesko, Marta H., Miranda Rota, Enrique, Dahan, Rony, Georgiou, Andrew, Sledzinska, Anna, Ben Aissa, Assma, Franz, Dafne, Werner Sunderland, Mariana, Wong, Yien Ning Sophia, Henry, Jake Y., O’Brien, Tim, Nicol, David, Challacombe, Ben, Beers, Stephen A., Turajlic, Samra, Gore, Martin, Larkin, James, Swanton, Charles, Chester, Kerry A., Pule, Martin, Ravetch, Jeffrey V., Marafioti, Teresa, Peggs, Karl S., Quezada, Sergio A., Spain, Lavinia, Wotherspoon, Andrew, Francis, Nicholas, Smith, Myles, Strauss, Dirk, Hayes, Andrew, Soultati, Aspasia, Stares, Mark, Lynch, Joanna, Fotiadis, Nicos, Fernando, Archana, Hazell, Steve, Chandra, Ashish, Pickering, Lisa, Rudman, Sarah, Chowdhury, Simon, Jamal-Hanjani, Mariam, Veeriah, Selvaraju, Shafi, Seema, Czyzewska-Khan, Justyna, Johnson, Diana, Laycock, Joanne, Bosshard-Carter, Leticia, Goh, Gerald, Rosenthal, Rachel, Gorman, Pat, Murugaesu, Nirupa, Hynds, Robert E., Wilson, Gareth, Birkbak, Nicolai J., Watkins, Thomas B.K., McGranahan, Nicholas, Horswell, Stuart, Mitter, Richard, Escudero, Mickael, Stewart, Aengus, Van Loo, Peter, Rowan, Andrew, Xu, Hang, Hiley, Crispin, Abbosh, Christopher, Goldman, Jacki, Stone, Richard Kevin, Denner, Tamara, Matthews, Nik, Elgar, Greg, Ward, Sophia, Biggs, Jennifer, Costa, Marta, Begum, Sharmin, Phillimore, Ben, Chambers, Tim, Nye, Emma, Graca, Sofia, Al Bakir, Maise, Hartley, John A., Lowe, Helen L., Herrero, Javier, Lawrence, David, Hayward, Martin, Panagiotopoulos, Nikolaos, Kolvekar, Shyam, Falzon, Mary, Borg, Elaine, Simeon, Celia, Hector, Gemma, Smith, Amy, Aranda, Marie, Novelli, Marco, Oukrif, Dahmane, Janes, Sam M., Thakrar, Ricky, Forster, Martin, Ahmad, Tanya, Lee, Siow Ming, Papadatos-Pastos, Dionysis, Carnell, Dawn, Mendes, Ruheena, George, Jeremy, Navani, Neal, Ahmed, Asia, Taylor, Magali, Choudhary, Junaid, Summers, Yvonne, Califano, Raffaele, Taylor, Paul, Shah, Rajesh, Krysiak, Piotr, Rammohan, Kendadai, Fontaine, Eustace, Booton, Richard, Evison, Matthew, Crosbie, Phil, Moss, Stuart, Idries, Faiza, Joseph, Leena, Bishop, Paul, Chaturved, Anshuman, Quinn, Anne Marie, Doran, Helen, Leek, Angela, Harrison, Phil, Moore, Katrina, Waddington, Rachael, Novasio, Juliette, Blackhall, Fiona, Rogan, Jane, Smith, Elaine, Dive, Caroline, Tugwood, Jonathan, Brady, Ged, Rothwell, Dominic G., Chemi, Francesca, Pierce, Jackie, Gulati, Sakshi, Naidu, Babu, Langman, Gerald, Trotter, Simon, Bellamy, Mary, Bancroft, Hollie, Kerr, Amy, Kadiri, Salma, Webb, Joanne, Middleton, Gary, Djearaman, Madava, Fennell, Dean, Shaw, Jacqui A., Le Quesne, John, Moore, David, Nakas, Apostolos, Rathinam, Sridhar, Monteiro, William, Marshall, Hilary, Nelson, Louise, Bennett, Jonathan, Riley, Joan, Primrose, Lindsay, Martinson, Luke, Anand, Girija, Khan, Sajid, Amadi, Anita, Nicolson, Marianne, Kerr, Keith, Palmer, Shirley, Remmen, Hardy, Miller, Joy, Buchan, Keith, Chetty, Mahendran, Gomersall, Lesley, Lester, Jason, Edwards, Alison, Morgan, Fiona, Adams, Haydn, Davies, Helen, Kornaszewska, Malgorzata, Attanoos, Richard, Lock, Sara, Verjee, Azmina, MacKenzie, Mairead, Wilcox, Maggie, Bell, Harriet, Iles, Natasha, Hackshaw, Allan, Ngai, Yenting, Smith, Sean, Gower, Nicole, Ottensmeier, Christian, Chee, Serena, Johnson, Benjamin, Alzetani, Aiman, Shaw, Emily, Lim, Eric, De Sousa, Paulo, Barbosa, Monica Tavares, Bowman, Alex, Jorda, Simon, Rice, Alexandra, Raubenheimer, Hilgardt, Proli, Chiara, Cufari, Maria Elena, Ronquillo, John Carlo, Kwayie, Angela, Bhayani, Harshil, Hamilton, Morag, Bakar, Yusura, Mensah, Natalie, Ambrose, Lyn, Devaraj, Anand, Buderi, Silviu, Finch, Jonathan, Azcarate, Leire, Chavan, Hema, Green, Sophie, Mashinga, Hillaria, Nicholson, Andrew G., Lau, Kelvin, Sheaff, Michael, Schmid, Peter, Conibear, John, Ezhil, Veni, Ismail, Babikir, Irvin-sellers, Melanie, Prakash, Vineet, Russell, Peter, Light, Teresa, Horey, Tracey, Danson, Sarah, Bury, Jonathan, Edwards, John, Hill, Jennifer, Matthews, Sue, Kitsanta, Yota, Suvarna, Kim, Fisher, Patricia, Keerio, Allah Dino, Shackcloth, Michael, Gosney, John, Postmus, Pieter, Feeney, Sarah, and Asante-Siaw, Julius

Subjects
hemic and immune systems, chemical and pharmacologic phenomena, R1
Abstract

Summary\ud \ud CD25 is expressed at high levels on regulatory T (Treg) cells and was initially proposed as a target for cancer immunotherapy. However, anti-CD25 antibodies have displayed limited activity against established tumors. We demonstrated that CD25 expression is largely restricted to tumor-infiltrating Treg cells in mice and humans. While existing anti-CD25 antibodies were observed to deplete Treg cells in the periphery, upregulation of the inhibitory Fc gamma receptor (FcγR) IIb at the tumor site prevented intra-tumoral Treg cell depletion, which may underlie the lack of anti-tumor activity previously observed in pre-clinical models. Use of an anti-CD25 antibody with enhanced binding to activating FcγRs led to effective depletion of tumor-infiltrating Treg cells, increased effector to Treg cell ratios, and improved control of established tumors. Combination with anti-programmed cell death protein-1 antibodies promoted complete tumor rejection, demonstrating the relevance of CD25 as a therapeutic target and promising substrate for future combination approaches in immune-oncology.

Published
2017

3. Análise econômica e histórica do instituto da unitização

Author

Monteiro, William Luiz de Souza, Escolas::EPGE, FGV, and Hernandez Perez, Adriana Azevedo

Subjects
Custos de transação, Unidade de operação de campos de petróleo, Tragédia dos comuns, Rule of capture, Coordenação, Teoria dos contratos, The tragedy of the commons, Transactions cost, Regra da captura, Economia, Assimetria da informação, Unitization, Theory of contracts, Coordination, Unitização, Finanças, Gás natural, Indústria petrolífera, Contratos, Common-pool resource, Assimetric information
Abstract

This paper deals with the theme 'The Institute of Unitization,' or even 'Individualization of Production,' as national classification, terms that describe what happens to be a joint and coordinated from a reservoir of oil or gas by all parties with property rights on the areas where the reservoir stretches. The concepts of Unitization will be studied and discussed according to context of the oil industry in its entirety technical, legal and economic issues. In light of Economic Theory, will be analyzed the Fundamentals of the Institute of Unitization and evolution of its application in national and international context. O presente trabalho aborda o tema 'Instituto da Unitização', ou mesmo 'Individualização da Produção', conforme nomenclatura nacional, termos que designam o que vem a ser uma operação conjunta e coordenada de um reservatório de petróleo, gás natural ou ambos por todas as partes com direitos de propriedade sobre as áreas por onde se estende o reservatório. Os conceitos de Unitização serão estudados e abordados segundo contexto da indústria do petróleo em seus elementos técnicos, jurídicos e econômicos. À luz da Teoria Econômica, serão analisados os Fundamentos do Instituto da Unitização e a evolução de sua aplicação no contexto nacional e internacional.

Published
2010

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