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Your search keyword '"Phillips, Daniel J"' showing total 37 results
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37 results on '"Phillips, Daniel J"'

1. Polymeric surfactants at liquid–liquid interfaces: Dependence of structural and thermodynamic properties on copolymer architecture.

Author

Coldstream, Jonathan G., Camp, Philip J., Phillips, Daniel J., and Dowding, Peter J.

Subjects
THERMODYNAMICS, LIQUID-liquid interfaces, SURFACE active agents, INTERFACIAL tension, COPOLYMERS, BLOCK copolymers, POLYMERS
Abstract

Polymeric surfactants are amphiphilic molecules with two or more different types of monomers. If one type of monomer interacts favorably with a liquid, and another type of monomer interacts favorably with another, immiscible liquid, then polymeric surfactants adsorb at the interface between the two liquids and reduce the interfacial tension. The effects of polymer architecture on the structural and thermodynamic properties of the liquid–liquid interface are studied using molecular simulations. The interface is modeled with a non-additive binary Lennard-Jones fluid in the two-phase region of the phase diagram. Block and gradient copolymer surfactants are represented with coarse-grained, bead-spring models, where each component of the polymer favors one or the other liquid. Gradient copolymers have a greater concentration at the interface than do block copolymers because the gradient copolymers adopt conformations partially aligned with the interface. The interfacial tension is determined as a function of the surface excess of polymeric surfactant. Gradient copolymers are more potent surfactants than block copolymers because the gradient copolymers cross the dividing surface multiple times, effectively acting as multiple individual surfactants. For a given surface excess, the interfacial tension decreases monotonically when changing from a block to a gradient architecture. The coarse-grained simulations are complemented by all-atom simulations of acrylic-acid/styrene copolymers at the chloroform-water interface, which have been studied in experiments. The agreement between the simulations (both coarse-grained and atomistic) and experiments is shown to be excellent, and the molecular-scale structures identified in the simulations help explain the variation of surfactancy with copolymer architecture. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Correlates of protection against symptomatic and asymptomatic SARS-CoV-2 infection

Author

Feng, Shuo, Phillips, Daniel J., White, Thomas, Sayal, Homesh, Aley, Parvinder K., Bibi, Sagida, and Dold, Christina

Subjects
Immune response -- Analysis, Viral antibodies -- Measurement, Antibodies -- Measurement, Biological sciences, Health
Abstract

The global supply of COVID-19 vaccines remains limited. An understanding of the immune response that is predictive of protection could facilitate rapid licensure of new vaccines. Data from a randomized efficacy trial of the ChAdOx1 nCoV-19 (AZD1222) vaccine in the United Kingdom was analyzed to determine the antibody levels associated with protection against SARS-CoV-2. Binding and neutralizing antibodies at 28 days after the second dose were measured in infected and noninfected vaccine recipients. Higher levels of all immune markers were correlated with a reduced risk of symptomatic infection. A vaccine efficacy of 80% against symptomatic infection with majority Alpha (B.1.1.7) variant of SARS-CoV-2 was achieved with 264 (95% CI: 108, 806) binding antibody units (BAU)/ml: and 506 (95% CI: 135, not computed (beyond data range) (NC)) BAU/ml for anti-spike and anti-RBD antibodies, and 26 (95% CI: NC, NC) international unit (IU)/ml and 247 (95% CI: 101, NC) normalized neutralization titers (NF.sub.50) for pseudovirus and live-virus neutralization, respectively. Immune markers were not correlated with asymptomatic infections at the 5% significance level. These data can be used to bridge to new populations using validated assays, and allow extrapolation of efficacy estimates to new COVID-19 vaccines. Defined levels of SARS-CoV-2-specific binding and neutralizing antibodies elicited by the COVID-19 vaccine ChAdOx1 nCoV-19 are identified as correlates of protection against symptomatic infection., Author(s): Shuo Feng [sup.1] , Daniel J. Phillips [sup.1] , Thomas White [sup.2] , Homesh Sayal [sup.2] , Parvinder K. Aley [sup.1] , Sagida Bibi [sup.1] , Christina Dold [sup.1] [...]

Published
2021
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3. Efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine against SARS-CoV-2 variant of concern 202012/01 (B.1.1.7): an exploratory analysis of a randomised controlled trial

Author

Emary, Katherine R W, Golubchik, Tanya, Aley, Parvinder K, Ariani, Cristina V, Angus, Brian, Bibi, Sagida, Blane, Beth, Bonsall, David, Cicconi, Paola, Charlton, Sue, Clutterbuck, Elizabeth A, Collins, Andrea M, Cox, Tony, Darton, Thomas C, Dold, Christina, Douglas, Alexander D, Duncan, Christopher J A, Ewer, Katie J, Flaxman, Amy L, Faust, Saul N, Ferreira, Daniela M, Feng, Shuo, Finn, Adam, Folegatti, Pedro M, Fuskova, Michelle, Galiza, Eva, Goodman, Anna L, Green, Catherine M, Green, Christopher A, Greenland, Melanie, Hallis, Bassam, Heath, Paul T, Hay, Jodie, Hill, Helen C, Jenkin, Daniel, Kerridge, Simon, Lazarus, Rajeka, Libri, Vincenzo, Lillie, Patrick J, Ludden, Catherine, Marchevsky, Natalie G, Minassian, Angela M, McGregor, Alastair C, Mujadidi, Yama F, Phillips, Daniel J, Plested, Emma, Pollock, Katrina M, Robinson, Hannah, Smith, Andrew, Song, Rinn, Snape, Matthew D, Sutherland, Rebecca K, Thomson, Emma C, Toshner, Mark, Turner, David P J, Vekemans, Johan, Villafana, Tonya L, Williams, Christopher J, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, Voysey, Merryn, Ramasamy, Maheshi N, and Pollard, Andrew J

Published
2021
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4. Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials

Author

Aban, Marites, Abeyskera, Kushala W.M., Aboagye, Jeremy, Adam, Matthew, Adams, Kirsty, Adamson, James P., Adewatan, Gbadebo, Adlou, Syed, Ahmed, Khatija, Akhalwaya, Yasmeen, Akhalwaya, Saajida, Alcock, Andrew, Ali, Aabidah, Allen, Elizabeth R., Allen, Lauren, Alvernaz, Felipe B., Amorim, Fabio Santos, Andrade, Claudia Sala, Andritsou, Foteini, Anslow, Rachel, Arbe-Barnes, Edward H., Ariaans, Mark P., Arns, Beatriz, Arruda, Laiana, Assad, Luiza, Azi, Paula De Almeida, Azi, Lorena De Almeida, Babbage, Gavin, Bailey, Catherine, Baker, Kenneth F., Baker, Megan, Baker, Natalie, Baker, Philip, Baleanu, Ioana, Bandeira, Danieli, Bara, Anna, Barbosa, Marcella A.S., Barker, Debbie, Barlow, Gavin D., Barnes, Eleanor, Barr, Andrew S., Barrett, Jordan R., Barrett, Jessica, Barrett, Kelly, Bates, Louise, Batten, Alexander, Beadon, Kirsten, Beales, Emily, Beckley, Rebecca, Belij-Rammerstorfer, Sandra, Bell, Jonathan, Bellamy, Duncan, Belton, Sue, Berg, Adam, Bermejo, Laura, Berrie, Eleanor, Berry, Lisa, Berzenyi, Daniella, Beveridge, Amy, Bewley, Kevin R., Bharaj, Inderjeet, Bhikha, Sutika, Bhorat, Asad E., Bhorat, Zaheda E., Bijker, Else Margreet, Birch, Sarah, Birch, Gurpreet, Birchall, Kathryn, Bird, Adam, Bird, Olivia, Bisnauthsing, Karen, Bittaye, Mustapha, Blackwell, Luke, Blacow, Rachel, Bletchly, Heather, Blundell, Caitlin L., Blundell, Susannah R., Bodalia, Pritesh, Bolam, Emma, Boland, Elena, Bormans, Daan, Borthwick, Nicola, Bowring, Francesca, Boyd, Amy, Bradley, Penny, Brenner, Tanja, Bridges-Webb, Alice, Brown, Phillip, Brown, Claire, Brown-O'Sullivan, Charlie, Bruce, Scott, Brunt, Emily, Budd, William, Bulbulia, Yusuf A., Bull, Melanie, Burbage, Jamie, Burn, Aileen, Buttigieg, Karen R., Byard, Nicholas, Cabrera Puig, Ingrid, Calvert, Anna, Camara, Susana, Cao, Michelangelo, Cappuccini, Federica, Cardona, Rita, Cardoso, João R., Carr, Melanie, Carroll, Miles W., Carson-Stevens, Andrew, Carvalho, Yasmin de M., Casey, Helen R., Cashen, Paul, Castro, Thais R.Y., Castro, Lucia Carratala, Cathie, Katrina, Cavey, Ana, Cerbino-Neto, José, Cezar, Luiz Fernando F., Chadwick, Jim, Chanice, Chanice, Chapman, David, Charlton, Sue, Cheliotis, Katerina S., Chelysheva, Irina, Chester, Oliver, Chiplin, Emily, Chita, Sunder, Cho, Jee-Sun, Cifuentes, Liliana, Clark, Elizabeth, Clark, Matthew, Colin-Jones, Rachel, Collins, Sarah L.K., Colton, Hayley, Conlon, Christopher P., Connarty, Sean, Coombes, Naomi, Cooper, Cushla, Cooper, Rachel, Cornelissen, Lynne, Corrah, Tumena, Cosgrove, Catherine A., Costa, Fernanda Barroso, Cox, Tony, Crocker, Wendy E.M., Crosbie, Sarah, Cullen, Dan, Cunha, Debora R.M.F., Cunningham, Christina J., Cuthbertson, Fiona C., da Costa, Daniel Marinho, Da Guarda, Suzete N. Farias, da Silva, Larissa P., da Silva Moraes, Antonio Carlos, Damratoski, Brad E., Danos, Zsofia, Dantas, Maria T.D.C., Datoo, Mehreen S., Datta, Chandrabali, Davids, Malika, Davies, Sarah L., Davies, Kelly, Davies, Hannah, Davies, Sophie, Davies, Judith, Davis, Elizabeth J., Davis, John, de Carvalho, José A.M., De Jager, Jeanne, de Jesus Jnr, Sergio, De Oliveira Kalid, Lis Moreno, Dearlove, David, Demissie, Tesfaye, Desai, Amisha, Di Marco, Stefania, Di Maso, Claudio, Dinesh, Tanya, Docksey, Claire, Dong, Tao, Donnellan, Francesca R., Dos Santos, Tannyth Gomes, Dos Santos, Thainá G., Dos Santos, Erika Pachecho, Douglas, Naomi, Downing, Charlotte, Drake, Jonathan, Drake-Brockman, Rachael, Drury, Ruth, Du Plessis, Joan, Dunachie, Susanna J., Duncan, Andrew, Easom, Nicholas J.W., Edwards, Mandy, Edwards, Nick J., Edwards, Frances, El Muhanna, Omar M., Elias, Sean C., Ellison-Handley, Branwen, Elmore, Michael J., English, Marcus Rex, Esmail, Alisgair, Essack, Yakub Moosa, Farooq, Mutjaba, Fedosyuk, Sofiya, Felle, Sally, Ferguson, Susie, Ferreira Da Silva, Carla, Field, Samantha, Fisher, Richard, Fletcher, James, Fofie, Hazel, Fok, Henry, Ford, Karen J., Fothergill, Ross, Fowler, Jamie, Fraiman, Pedro H.A., Francis, Emma, Franco, Marilia M., Frater, John, Freire, Marilúcia S.M., Fry, Samantha H., Fudge, Sabrina, Furlan Filho, Renato, Furze, Julie, Fuskova, Michelle, Galian-Rubio, Pablo, Garlant, Harriet, Gavrila, Madita, Gibbons, Karyna A., Gilbride, Ciaran, Gill, Hardeep, Godwin, Kerry, Gokani, Karishma, Gonçalves, Maria Luisa Freire, Gonzalez, Isabela G.S., Goodall, Jack, Goodwin, Jayne, Goondiwala, Amina, Gordon-Quayle, Katherine, Gorini, Giacomo, Goyanna, Alvaro, Grab, Janet, Gracie, Lara, Green, Justin, Greenwood, Nicola, Greffrath, Johann, Groenewald, Marisa M., Gunawardene, Anishka, Gupta, Gaurav, Hackett, Mark, Hallis, Bassam, Hamaluba, Mainga, Hamilton, Elizabeth, Hamlyn, Joseph, Hammersley, Daniel, Hanrath, Aidan T., Hanumunthadu, Brama, Harris, Stephanie A., Harris, Clair, Harrison, Thomas D., Harrison, Daisy, Harris-Wright, Tara A., Hart, Thomas C., Hartnell, Birgit, Haughney, John, Hawkins, Sophia, Hayano, Laís Y.M., Head, Ian, Heath, Paul T., Henry, John Aaron, Hermosin Herrera, Macarena, Hettle, David B., Higa, Cristhiane, Hill, Jennifer, Hodges, Gina, Hodgson, Susanne, Horne, Elizea, Hou, Mimi M., Houlihan, Catherine F., Howe, Elizabeth, Howell, Nicola, Humphreys, Jonathan, Humphries, Holly E., Hurley, Katrina, Huson, Claire, Hyams, Catherine, Hyder-Wright, Angela, Ikram, Sabina, Ishwarbhai, Alka, Iveson, Poppy, Iyer, Vidyashankara, Jackson, Frederic, Jackson, Susan, Jaumdally, Shameem, Jeffers, Helen, Jesudason, Natasha, Jones, Carina, Jones, Christopher, Jones, Kathryn, Jones, Elizabeth, Jorge, Marianna Rocha, Joshi, Amar, Júnior, Eduardo A.M.S., Kailath, Reshma, Kana, Faeeza, Kar, Arnab, Karampatsas, Konstantinos, Kasanyinga, Mwila, Kay, Linda, Keen, Jade, Kellett Wright, Johanna, Kelly, Elizabeth J., Kelly, Debbie, Kelly, Dearbhla M., Kelly, Sarah, Kerr, David, Khan, Liaquat, Khozoee, Baktash, Khurana, Ankush, Kidd, Sarah, Killen, Annabel, Kinch, Jasmin, Kinch, Patrick, King, Lloyd D.W., King, Thomas B., Kingham, Lucy, Klenerman, Paul, Kluczna, Diana M., Knapper, Francesca, Knight, Julian C., Knott, Daniel, Koleva, Stanislava, Lages, Pedro M., Lang, Matilda, Lang, Gail, Larkworthy, Colin W., Larwood, Jessica P.J., Law, Rebecca, Lawrie, Alison M., Lazarus, Erica M., Leach, Amanda, Lees, Emily A., Lelliott, Alice, Lemm, Nana-Marie, Lessa, Alvaro Edson Ramos, Leung, Stephanie, Li, Yuanyuan, Lias, Amelia M., Liatsikos, Konstantinos, Linder, Aline, Lipworth, Samuel, Liu, Shuchang, Liu, Xinxue, Lloyd, Adam, Lloyd, Stephanie, Loew, Lisa, Lopez Ramon, Raquel, Lora, Leandro Bonecker, Luz, Kleber Giovanni, MacDonald, Jonathan C., MacGregor, Gordon, Madhavan, Meera, Mainwaring, David O., Makambwa, Edson, Makinson, Rebecca, Malahleha, Mookho, Malamatsho, Ross, Mallett, Garry, Manning, Nicola, Mansatta, Kushal, Maoko, Takalani, Marinou, Spyridoula, Marlow, Emma, Marques, Gabriela N., Marriott, Paula, Marshall, Richard P., Marshall, Julia L., Masenya, Masebole, Masilela, Mduduzi, Masters, Shauna K., Mathew, Moncy, Matlebjane, Hosea, Matshidiso, Kedidimetse, Mazur, Olga, Mazzella, Andrea, McCaughan, Hugh, McEwan, Joanne, McGlashan, Joanna, McInroy, Lorna, McRobert, Nicky, McSwiggan, Steve, Megson, Clare, Mehdipour, Savviz, Meijs, Wilma, Mendonça, Renata N.Õ., Mentzer, Alexander J., Mesquita, Ana Carolina F., Miralhes, Patricia, Mirtorabi, Neginsadat, Mitton, Celia, Mnyakeni, Sibusiso, Moghaddas, Fiona, Molapo, Kgaogelo, Moloi, Mapule, Moore, Maria, Moran, Marni, Morey, Ella, Morgans, Róisín, Morris, Susan J., Morris, Sheila, Morrison, Hazel, Morselli, Franca, Morshead, Gertraud, Morter, Richard, Mottay, Lynelle, Moultrie, Andrew, Moyo, Nathifa, Mpelembue, Mushiya, Msomi, Sibekezelo, Mugodi, Yvonne, Mukhopadhyay, Ekta, Muller, Jilly, Munro, Alasdair, Murphy, Sarah, Mweu, Philomena, Myerscough, Christopher, Naik, Gurudutt, Naker, Kush, Nastouli, Eleni, Ndlovu, Bongani, Nikolaou, Elissavet, Njenga, Cecilia, Noal, Helena C., Noé, Andrés, Novaes, Gabrielle, Nugent, Fay L., Nunes, Géssika Lanzillo A., O'Brien, Katie, O'Connor, Daniel, Oelofse, Suzette, Oguti, Blanche, Olchawski, Victoria, Oldfield, Neil J., Oliveira, Marianne G., Oliveira, Catarina, Oliveira, Isabelle Silva Queiroz, Oommen-Jose, Aylin, Oosthuizen, Angela, O'Reilly, Paula, O'Reilly, Peter J., Osborne, Piper, Owen, David R.J., Owen, Lydia, Owens, Daniel, Owino, Nelly, Pacurar, Mihaela, Paiva, Brenda V.B., Palhares, Edna M.F., Palmer, Susan, Parracho, Helena M. R.T., Parsons, Karen, Patel, Dipak, Patel, Bhumika, Patel, Faeezah, Patrick-Smith, Maia, Payne, Ruth O., Peng, Yanchun, Penn, Elizabeth J., Pennington, Anna, Peralta Alvarez, Marco Polo, Pereira Stuchi, Bruno Pereira, Perez, Ana Luiza, Perinpanathan, Tanaraj, Perring, James, Perumal, Rubeshan, Petkar, Sahir Yusuf, Philip, Tricia, Phillips, Jennifer, Phohu, Mary Kgomotso, Pickup, Lorinda, Pieterse, Sonja, Pinheiro, Jessica Morgana, Piper, Jo, Pipini, Dimitra, Plank, Mary, Plant, Sinéad, Pollard, Samuel, Pooley, Jennifer, Pooran, Anil, Poulton, Ian, Powers, Claire, Presa, Fernando B., Price, David A., Price, Vivien, Primeira, Marcelo R., Proud, Pamela C., Provstgaard-Morys, Samuel, Pueschel, Sophie, Pulido, David, Quaid, Sheena, Rabara, Ria, Radia, Kajal, Rajapaska, Durga, Rajeswaran, Thurkka, Ramos, Leonardo, Ramos, Alberto San Francisco, Ramos Lopez, Fernando, Rampling, Tommy, Rand, Jade, Ratcliffe, Helen, Rawlinson, Tom, Rea, David, Rees, Byron, Resuello-Dauti, Mila, Reyes Pabon, Emilia, Rhead, Sarah, Riaz, Tawassal, Ricamara, Marivic, Richards, Alexander, Richter, Alex, Ritchie, Neil, Ritchie, Adam J., Robbins, Alexander J., Roberts, Hannah, Robinson, Ryan E., Roche, Sophie, Rollier, Christine, Rose, Louisa, Ross Russell, Amy L., Rossouw, Lindie, Royal, Simon, Rudiansyah, Indra, Ryalls, Kim, Sabine, Charlotte, Saich, Stephen, Sale, Jessica C., Salman, Ahmed M., Salvador, Natalia, Salvador, Stephannie, Sampaio, Milla Dias, Samson, Annette D., Sanchez-Gonzalez, Amada, Sanders, Helen, Sanders, Katherine, Santos, Erika, Santos Guerra, Mayara F.S., Satti, Iman, Saunders, Jack E., Saunders, Caroline, Sayed, Aakifah Bibi Arif, Schim van der Loeff, Ina, Schmid, Annina B., Schofield, Ella, Screaton, Gavin R., Seddiqi, Samiullah, Segireddy, Rameswara R., Senger, Roberta, Serrano, Sonia, Shaik, Imam, Sharpe, Hannah R., Sharrocks, Katherine, Shaw, Robert, Shea, Adam, Sheehan, Emma, Shepherd, Amy, Shiham, Farah, Silk, Sarah E., Silva-Reyes, Laura, Silveira, Lidiana B. T.D., Silveira, Mariana B.V., Singh, Nisha, Sinha, Jaisi, Skelly, Donal T., Smith, Daniel C., Smith, Nick, Smith, Holly E., Smith, David J., Smith, Catherine C., Soares, Airanuédida S., Solórzano, Carla, Sorio, Guilherme L., Sorley, Kim, Sosa-Rodriguez, Tiffany, Souza, Cinthia M.C.D.L., Souza, Bruno S.D.F., Souza, Alessandra R., Souza Lopez, Thamyres, Sowole, Luciana, Spencer, Alexandra J., Spoors, Louise, Stafford, Lizzie, Stamford, Imogen, Stein, Ricardo, Stockdale, Lisa, Stockwell, Lisa V., Strickland, Louise H., Stuart, Arabella, Sturdy, Ann, Sutton, Natalina, Szigeti, Anna, Tahiri-Alaoui, Abdessamad, Tanner, Rachel, Taoushanis, Carol, Tarr, Alexander W., Tarrant, Richard, Taylor, Keja, Taylor, Ursula, Taylor, Iona Jennifer, Taylor, Justin, te Water Naude, Rebecca, Templeton, Kate, Themistocleous, Yrene, Themistocleous, Andreas, Thomas, Merin, Thomas, Kelly, Thomas, Tonia M., Thombrayil, Asha, Thompson, Julia, Thompson, Fawziyah, Thompson, Ameeka, Thompson, Amber, Thompson, Kevin, Thornton-Jones, Viv, Thotusi, Larissa H.S., Tighe, Patrick J., Tinoco, Lygia Accioly, Tiongson, Gerlynn Ferreras, Tladinyane, Bonolo, Tomasicchio, Michele, Tomic, Adriana, Tonks, Susan, Towner, James, Tran, Nguyen, Tree, Julia A., Trillana, Gerry, Trinham, Charlotte, Trivett, Rose, Truby, Adam, Tsheko, Betty Lebogang, Tubb, Philippa, Turabi, Aadil, Turner, Richard, Turner, Cheryl, Turner, Nicola, Tyagi, Bhavya, Ulaszewska, Marta, Underwood, Benjamin R., van Eck, Samual, Varughese, Rachel, Verbart, Dennis, Verheul, Marije K., Vichos, Iason, Vieira, Taiane A., Walker, Gemma, Walker, Laura, Wand, Matthew E., Wardell, Theresa, Warimwe, George M., Warren, Sarah C., Watkins, Bridget, Watson, Marion E.E., Watson, Ekaterina, Webb, Stewart, Webster, Angela, Welch, Jessica, Wellbelove, Zoe, Wells, Jeanette H., West, Alison J., White, Beth, White, Caroline, White, Rachel, Williams, Paul, Williams, Rachel L., Willingham, Silvia, Winslow, Rebecca, Woods, Danielle, Woodyer, Mark, Worth, Andrew T., Wright, Danny, Wroblewska, Marzena, Yao, Andy, Yim, Yee Ting Nicole, Zambrano, Marina Bauer, Zimmer, Rafael Leal, Zizi, Dalila, Zuidewind, Peter, Voysey, Merryn, Costa Clemens, Sue Ann, Madhi, Shabir A, Weckx, Lily Y, Folegatti, Pedro M, Aley, Parvinder K, Angus, Brian, Baillie, Vicky L, Barnabas, Shaun L, Bhorat, Qasim E, Bibi, Sagida, Briner, Carmen, Cicconi, Paola, Clutterbuck, Elizabeth A, Collins, Andrea M, Cutland, Clare L, Darton, Thomas C, Dheda, Keertan, Dold, Christina, Duncan, Christopher J A, Emary, Katherine R W, Ewer, Katie J, Flaxman, Amy, Fairlie, Lee, Faust, Saul N, Feng, Shuo, Ferreira, Daniela M, Finn, Adam, Galiza, Eva, Goodman, Anna L, Green, Catherine M, Green, Christopher A, Greenland, Melanie, Hill, Catherine, Hill, Helen C, Hirsch, Ian, Izu, Alane, Jenkin, Daniel, Joe, Carina C D, Kerridge, Simon, Koen, Anthonet, Kwatra, Gaurav, Lazarus, Rajeka, Libri, Vincenzo, Lillie, Patrick J, Marchevsky, Natalie G, Marshall, Richard P, Mendes, Ana V A, Milan, Eveline P, Minassian, Angela M, McGregor, Alastair, Mujadidi, Yama F, Nana, Anusha, Padayachee, Sherman D, Phillips, Daniel J, Pittella, Ana, Plested, Emma, Pollock, Katrina M, Ramasamy, Maheshi N, Ritchie, Adam J, Robinson, Hannah, Schwarzbold, Alexandre V, Smith, Andrew, Song, Rinn, Snape, Matthew D, Sprinz, Eduardo, Sutherland, Rebecca K, Thomson, Emma C, Török, M Estée, Toshner, Mark, Turner, David P J, Vekemans, Johan, Villafana, Tonya L, White, Thomas, Williams, Christopher J, Douglas, Alexander D, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, and Pollard, Andrew J

Published
2021
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5. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

Author

Aban, Marites, Abayomi, Fatola, Abeyskera, Kushala, Aboagye, Jeremy, Adam, Matthew, Adams, Kirsty, Adamson, James, Adelaja, Yemi A., Adewetan, Gbadebo, Adlou, Syed, Ahmed, Khatija, Akhalwaya, Yasmeen, Akhalwaya, Saajida, Alcock, Andrew, Ali, Aabidah, Allen, Elizabeth R., Allen, Lauren, Almeida, Thamires C. D. S. C, Alves, Mariana P.S., Amorim, Fabio, Andritsou, Foteini, Anslow, Rachel, Appleby, Matthew, Arbe-Barnes, Edward H., Ariaans, Mark P., Arns, Beatriz, Arruda, Laiana, Azi, Paula, Azi, Lorena, Babbage, Gavin, Bailey, Catherine, Baker, Kenneth F., Baker, Megan, Baker, Natalie, Baker, Philip, Baldwin, Lisa, Baleanu, Ioana, Bandeira, Danieli, Bara, Anna, Barbosa, Marcella A.S., Barker, Debbie, Barlow, Gavin D., Barnes, Eleanor, Barr, Andrew S., Barrett, Jordan R., Barrett, Jessica, Bates, Louise, Batten, Alexander, Beadon, Kirsten, Beales, Emily, Beckley, Rebecca, Belij-Rammerstorfer, Sandra, Bell, Jonathan, Bellamy, Duncan, Bellei, Nancy, Belton, Sue, Berg, Adam, Bermejo, Laura, Berrie, Eleanor, Berry, Lisa, Berzenyi, Daniella, Beveridge, Amy, Bewley, Kevin R., Bexhell, Helen, Bhikha, Sutika, Bhorat, Asad E., Bhorat, Zaheda E., Bijker, Else, Birch, Geeta, Birch, Sarah, Bird, Adam, Bird, Olivia, Bisnauthsing, Karen, Bittaye, Mustapha, Blackstone, Katherine, Blackwell, Luke, Bletchly, Heather, Blundell, Caitlin L., Blundell, Susannah R., Bodalia, Pritesh, Boettger, Bruno C., Bolam, Emma, Boland, Elena, Bormans, Daan, Borthwick, Nicola, Bowring, Francesca, Boyd, Amy, Bradley, Penny, Brenner, Tanja, Brown, Phillip, Brown, Claire, Brown-O'Sullivan, Charlie, Bruce, Scott, Brunt, Emily, Buchan, Ruaridh, Budd, William, Bulbulia, Yusuf A., Bull, Melanie, Burbage, Jamie, Burhan, Hassan, Burn, Aileen, Buttigieg, Karen R., Byard, Nicholas, Cabera Puig, Ingrid, Calderon, Gloria, Calvert, Anna, Camara, Susana, Cao, Michelangelo, Cappuccini, Federica, Cardoso, João R., Carr, Melanie, Carroll, Miles W., Carson-Stevens, Andrew, Carvalho, Yasmin de M., Carvalho, José A.M., Casey, Helen R., Cashen, Paul, Castro, Thais, Castro, Lucia Carratala, Cathie, Katrina, Cavey, Ana, Cerbino-Neto, José, Chadwick, Jim, Chapman, David, Charlton, Sue, Chelysheva, Irina, Chester, Oliver, Chita, Sunder, Cho, Jee-Sun, Cifuentes, Liliana, Clark, Elizabeth, Clark, Matthew, Clarke, Andrea, Clutterbuck, Elizabeth A., Collins, Sarah L.K., Conlon, Christopher P., Connarty, Sean, Coombes, Naomi, Cooper, Cushla, Cooper, Rachel, Cornelissen, Lynne, Corrah, Tumena, Cosgrove, Catherine, Cox, Tony, Crocker, Wendy E.M., Crosbie, Sarah, Cullen, Lorraine, Cullen, Dan, Cunha, Debora R.M.F., Cunningham, Christina, Cuthbertson, Fiona C., Da Guarda, Suzete N. Farias, da Silva, Larissa P., Damratoski, Brad E., Danos, Zsofia, Dantas, Maria T.D.C., Darroch, Paula, Datoo, Mehreen S., Datta, Chandrabali, Davids, Malika, Davies, Sarah L., Davies, Hannah, Davis, Elizabeth, Davis, Judith, Davis, John, De Nobrega, Maristela M.D., De Oliveira Kalid, Lis Moreno, Dearlove, David, Demissie, Tesfaye, Desai, Amisha, Di Marco, Stefania, Di Maso, Claudio, Dinelli, Maria I.S., Dinesh, Tanya, Docksey, Claire, Dold, Christina, Dong, Tao, Donnellan, Francesca R., Dos Santos, Tannyth, dos Santos, Thainá G., Dos Santos, Erika Pachecho, Douglas, Naomi, Downing, Charlotte, Drake, Jonathan, Drake-Brockman, Rachael, Driver, Kimberley, Drury, Ruth, Dunachie, Susanna J., Durham, Benjamin S., Dutra, Lidiana, Easom, Nicholas J.W., van Eck, Samual, Edwards, Mandy, Edwards, Nick J., El Muhanna, Omar M., Elias, Sean C., Elmore, Mike, English, Marcus, Esmail, Alisgair, Essack, Yakub Moosa, Farmer, Eoghan, Farooq, Mutjaba, Farrar, Madi, Farrugia, Leonard, Faulkner, Beverley, Fedosyuk, Sofiya, Felle, Sally, Feng, Shuo, Ferreira Da Silva, Carla, Field, Samantha, Fisher, Richard, Flaxman, Amy, Fletcher, James, Fofie, Hazel, Fok, Henry, Ford, Karen J., Fowler, Jamie, Fraiman, Pedro H.A., Francis, Emma, Franco, Marilia M., Frater, John, Freire, Marilúcia S.M., Fry, Samantha H., Fudge, Sabrina, Furze, Julie, Fuskova, Michelle, Galian-Rubio, Pablo, Galiza, Eva, Garlant, Harriet, Gavrila, Madita, Geddes, Ailsa, Gibbons, Karyna A., Gilbride, Ciaran, Gill, Hardeep, Glynn, Sharon, Godwin, Kerry, Gokani, Karishma, Goldoni, Ursula Carvalho, Goncalves, Maria, Gonzalez, Isabela G.S., Goodwin, Jayne, Goondiwala, Amina, Gordon-Quayle, Katherine, Gorini, Giacomo, Grab, Janet, Gracie, Lara, Greenland, Melanie, Greenwood, Nicola, Greffrath, Johann, Groenewald, Marisa M., Grossi, Leonardo, Gupta, Gaurav, Hackett, Mark, Hallis, Bassam, Hamaluba, Mainga, Hamilton, Elizabeth, Hamlyn, Joseph, Hammersley, Daniel, Hanrath, Aidan T., Hanumunthadu, Brama, Harris, Stephanie A., Harris, Clair, Harris, Tara, Harrison, Thomas D., Harrison, Daisy, Hart, Thomas C., Hartnell, Birgit, Hassan, Shadin, Haughney, John, Hawkins, Sophia, Hay, Jodie, Head, Ian, Henry, John, Hermosin Herrera, Macarena, Hettle, David B., Hill, Jennifer, Hodges, Gina, Horne, Elizea, Hou, Mimi M., Houlihan, Catherine, Howe, Elizabeth, Howell, Nicola, Humphreys, Jonathan, Humphries, Holly E., Hurley, Katrina, Huson, Claire, Hyder-Wright, Angela, Hyams, Catherine, Ikram, Sabina, Ishwarbhai, Alka, Ivan, Monica, Iveson, Poppy, Iyer, Vidyashankara, Jackson, Frederic, De Jager, Jeanne, Jaumdally, Shameem, Jeffers, Helen, Jesudason, Natasha, Jones, Bryony, Jones, Kathryn, Jones, Elizabeth, Jones, Christopher, Jorge, Marianna Rocha, Jose, Aylin, Joshi, Amar, Júnior, Eduardo A.M.S., Kadziola, Joanne, Kailath, Reshma, Kana, Faeeza, Karampatsas, Konstantinos, Kasanyinga, Mwila, Keen, Jade, Kelly, Elizabeth J., Kelly, Dearbhla M., Kelly, Debbie, Kelly, Sarah, Kerr, David, Kfouri, Renato de Ávila, Khan, Liaquat, Khozoee, Baktash, Kidd, Sarah, Killen, Annabel, Kinch, Jasmin, Kinch, Patrick, King, Lloyd D.W., King, Thomas B., Kingham, Lucy, Klenerman, Paul, Knapper, Francesca, Knight, Julian C., Knott, Daniel, Koleva, Stanislava, Lang, Matilda, Lang, Gail, Larkworthy, Colin W., Larwood, Jessica P.J., Law, Rebecca, Lazarus, Erica M., Leach, Amanda, Lees, Emily A., Lemm, Nana-Marie, Lessa, Alvaro, Leung, Stephanie, Li, Yuanyuan, Lias, Amelia M., Liatsikos, Kostas, Linder, Aline, Lipworth, Samuel, Liu, Shuchang, Liu, Xinxue, Lloyd, Adam, Lloyd, Stephanie, Loew, Lisa, Lopez Ramon, Raquel, Lora, Leandro, Lowthorpe, Vicki, Luz, Kleber, MacDonald, Jonathan C., MacGregor, Gordon, Madhavan, Meera, Mainwaring, David O., Makambwa, Edson, Makinson, Rebecca, Malahleha, Mookho, Malamatsho, Ross, Mallett, Garry, Mansatta, Kushal, Maoko, Takalani, Mapetla, Katlego, Marchevsky, Natalie G., Marinou, Spyridoula, Marlow, Emma, Marques, Gabriela N., Marriott, Paula, Marshall, Richard P., Marshall, Julia L., Martins, Flávia J., Masenya, Masebole, Masilela, Mduduzi, Masters, Shauna K., Mathew, Moncy, Matlebjane, Hosea, Matshidiso, Kedidimetse, Mazur, Olga, Mazzella, Andrea, McCaughan, Hugh, McEwan, Joanne, McGlashan, Joanna, McInroy, Lorna, McIntyre, Zoe, McLenaghan, Daniela, McRobert, Nicky, McSwiggan, Steve, Megson, Clare, Mehdipour, Savviz, Meijs, Wilma, Mendonça, Renata N.Á., Mentzer, Alexander J., Mirtorabi, Neginsadat, Mitton, Celia, Mnyakeni, Sibusiso, Moghaddas, Fiona, Molapo, Kgaogelo, Moloi, Mapule, Moore, Maria, Moraes-Pinto, M. Isabel, Moran, Marni, Morey, Ella, Morgans, Róisín, Morris, Susan, Morris, Sheila, Morris, Helen C., Morselli, Franca, Morshead, Gertraud, Morter, Richard, Mottal, Lynelle, Moultrie, Andrew, Moya, Nathifa, Mpelembue, Mushiya, Msomi, Sibekezelo, Mugodi, Yvonne, Mukhopadhyay, Ekta, Muller, Jilly, Munro, Alasdair, Munro, Claire, Murphy, Sarah, Mweu, Philomena, Myasaki, Celia Hatsuko, Naik, Gurudutt, Naker, Kush, Nastouli, Eleni, Nazir, Abida, Ndlovu, Bongani, Neffa, Fabio, Njenga, Cecilia, Noal, Helena, Noé, Andrés, Novaes, Gabrielle, Nugent, Fay L., Nunes, Géssika, O'Brien, Katie, O'Connor, Daniel, Odam, Miranda, Oelofse, Suzette, Oguti, Blanche, Olchawski, Victoria, Oldfield, Neil J., Oliveira, Marianne G., Oliveira, Catarina, Oosthuizen, Angela, O'Reilly, Paula, Osborne, Piper, Owen, David R.J., Owen, Lydia, Owens, Daniel, Owino, Nelly, Pacurar, Mihaela, Paiva, Brenda V.B., Palhares, Edna M.F., Palmer, Susan, Parkinson, Sivapriyai, Parracho, Helena M.R.T., Parsons, Karen, Patel, Dipak, Patel, Bhumika, Patel, Faeezah, Patel, Kelly, Patrick-Smith, Maia, Payne, Ruth O., Peng, Yanchun, Penn, Elizabeth J., Pennington, Anna, Peralta Alvarez, Marco Polo, Perring, James, Perry, Nicola, Perumal, Rubeshan, Petkar, Sahir, Philip, Tricia, Phillips, Daniel J., Phillips, Jennifer, Phohu, Mary Kgomotso, Pickup, Lorinda, Pieterse, Sonja, Piper, Jo, Pipini, Dimitra, Plank, Mary, Du Plessis, Joan, Pollard, Samuel, Pooley, Jennifer, Pooran, Anil, Poulton, Ian, Powers, Claire, Presa, Fernando B., Price, David A., Price, Vivien, Primeira, Marcelo, Proud, Pamela C., Provstgaard-Morys, Samuel, Pueschel, Sophie, Pulido, David, Quaid, Sheena, Rabara, Ria, Radford, Alexandra, Radia, Kajal, Rajapaska, Durga, Rajeswaran, Thurkka, Ramos, Alberto San Francisco, Ramos Lopez, Fernando, Rampling, Tommy, Rand, Jade, Ratcliffe, Helen, Rawlinson, Tom, Rea, David, Rees, Byron, Reiné, Jesús, Resuello-Dauti, Mila, Reyes Pabon, Emilia, Ribiero, Carla M., Ricamara, Marivic, Richter, Alex, Ritchie, Neil, Ritchie, Adam J., Robbins, Alexander J., Roberts, Hannah, Robinson, Ryan E., Robinson, Hannah, Rocchetti, Talita T., Rocha, Beatriz Pinho, Roche, Sophie, Rollier, Christine, Rose, Louisa, Ross Russell, Amy L., Rossouw, Lindie, Royal, Simon, Rudiansyah, Indra, Ruiz, Sarah, Saich, Stephen, Sala, Claudia, Sale, Jessica, Salman, Ahmed M., Salvador, Natalia, Salvador, Stephannie, Sampaio, Milla, Samson, Annette D., Sanchez-Gonzalez, Amada, Sanders, Helen, Sanders, Katherine, Santos, Erika, Santos Guerra, Mayara F.S., Satti, Iman, Saunders, Jack E., Saunders, Caroline, Sayed, Aakifah, Schim van der Loeff, Ina, Schmid, Annina B., Schofield, Ella, Screaton, Gavin, Seddiqi, Samiullah, Segireddy, Rameswara R., Senger, Roberta, Serrano, Sonia, Shah, Rajiv, Shaik, Imam, Sharpe, Hannah E., Sharrocks, Katherine, Shaw, Robert, Shea, Adam, Shepherd, Amy, Shepherd, James G., Shiham, Farah, Sidhom, Emad, Silk, Sarah E., da Silva Moraes, Antonio Carlos, Silva-Junior, Gilberto, Silva-Reyes, Laura, Silveira, Anderson D., Silveira, Mariana B.V., Sinha, Jaisi, Skelly, Donal T., Smith, Daniel C., Smith, Nick, Smith, Holly E., Smith, David J., Smith, Catherine C., Soares, Airanuédida, Soares, Tiago, Solórzano, Carla, Sorio, Guilherme L., Sorley, Kim, Sosa-Rodriguez, Tiffany, Souza, Cinthia M.C.D.L., Souza, Bruno S.D.F., Souza, Alessandra R., Spencer, Alexandra J., Spina, Fernanda, Spoors, Louise, Stafford, Lizzie, Stamford, Imogen, Starinskij, Igor, Stein, Ricardo, Steven, Jill, Stockdale, Lisa, Stockwell, Lisa V., Strickland, Louise H., Stuart, Arabella C., Sturdy, Ann, Sutton, Natalina, Szigeti, Anna, Tahiri-Alaoui, Abdessamad, Tanner, Rachel, Taoushanis, Carol, Tarr, Alexander W., Taylor, Keja, Taylor, Ursula, Taylor, Iona Jennifer, Taylor, Justin, te Water Naude, Rebecca, Themistocleous, Yrene, Themistocleous, Andreas, Thomas, Merin, Thomas, Kelly, Thomas, Tonia M., Thombrayil, Asha, Thompson, Fawziyah, Thompson, Amber, Thompson, Kevin, Thompson, Ameeka, Thomson, Julia, Thornton-Jones, Viv, Tighe, Patrick J., Tinoco, Lygia Accioly, Tiongson, Gerlynn, Tladinyane, Bonolo, Tomasicchio, Michele, Tomic, Adriana, Tonks, Susan, Towner, James, Tran, Nguyen, Tree, Julia, Trillana, Gerry, Trinham, Charlotte, Trivett, Rose, Truby, Adam, Tsheko, Betty Lebogang, Turabi, Aadil, Turner, Richard, Turner, Cheryl, Ulaszewska, Marta, Underwood, Benjamin R., Varughese, Rachel, Verbart, Dennis, Verheul, Marije, Vichos, Iason, Vieira, Taiane, Waddington, Claire S., Walker, Laura, Wallis, Erica, Wand, Matthew, Warbick, Deborah, Wardell, Theresa, Warimwe, George, Warren, Sarah C., Watkins, Bridget, Watson, Ekaterina, Webb, Stewart, Webb-Bridges, Alice, Webster, Angela, Welch, Jessica, Wells, Jeanette, West, Alison, White, Caroline, White, Rachel, Williams, Paul, Williams, Rachel L., Winslow, Rebecca, Woodyer, Mark, Worth, Andrew T., Wright, Danny, Wroblewska, Marzena, Yao, Andy, Zimmer, Rafael, Zizi, Dalila, Zuidewind, Peter, Voysey, Merryn, Clemens, Sue Ann Costa, Madhi, Shabir A, Weckx, Lily Y, Folegatti, Pedro M, Aley, Parvinder K, Angus, Brian, Baillie, Vicky L, Barnabas, Shaun L, Bhorat, Qasim E, Bibi, Sagida, Briner, Carmen, Cicconi, Paola, Collins, Andrea M, Colin-Jones, Rachel, Cutland, Clare L, Darton, Thomas C, Dheda, Keertan, Duncan, Christopher J A, Emary, Katherine R W, Ewer, Katie J, Fairlie, Lee, Faust, Saul N, Ferreira, Daniela M, Finn, Adam, Goodman, Anna L, Green, Catherine M, Green, Christopher A, Heath, Paul T, Hill, Catherine, Hill, Helen, Hirsch, Ian, Hodgson, Susanne H C, Izu, Alane, Jackson, Susan, Jenkin, Daniel, Joe, Carina C D, Kerridge, Simon, Koen, Anthonet, Kwatra, Gaurav, Lazarus, Rajeka, Lawrie, Alison M, Lelliott, Alice, Libri, Vincenzo, Lillie, Patrick J, Mallory, Raburn, Mendes, Ana V A, Milan, Eveline P, Minassian, Angela M, McGregor, Alastair, Morrison, Hazel, Mujadidi, Yama F, Nana, Anusha, O’Reilly, Peter J, Padayachee, Sherman D, Pittella, Ana, Plested, Emma, Pollock, Katrina M, Ramasamy, Maheshi N, Rhead, Sarah, Schwarzbold, Alexandre V, Singh, Nisha, Smith, Andrew, Song, Rinn, Snape, Matthew D, Sprinz, Eduardo, Sutherland, Rebecca K, Tarrant, Richard, Thomson, Emma C, Török, M Estée, Toshner, Mark, Turner, David P J, Vekemans, Johan, Villafana, Tonya L, Watson, Marion E E, Williams, Christopher J, Douglas, Alexander D, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, and Pollard, Andrew J

Published
2021
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6. Safety and immunogenicity of ChAdOx1 nCoV-19 vaccine administered in a prime-boost regimen in young and old adults (COV002): a single-blind, randomised, controlled, phase 2/3 trial

Author

Aboagye, Jeremy, Adams, Kelly, Ali, Aabidah, Allen, Elizabeth R., Allen, Lauren, Allison, Jennifer L., Andritsou, Foteini, Anslow, Rachel, Arbe-Barnes, Edward H., Baker, Megan, Baker, Natalie, Baker, Philip, Baleanu, Ioana, Barker, Debbie, Barnes, Eleanor, Barrett, Jordan R., Barrett, Kelly, Bates, Louise, Batten, Alexander, Beadon, Kirsten, Beckley, Rebecca, Bellamy, Duncan, Berg, Adam, Bermejo, Laura, Berrie, Eleanor, Beveridge, Amy, Bewley, Kevin, Bijker, Else M., Birch, Geeta, Blackwell, Luke, Bletchly, Heather, Blundell, Caitlin L., Blundell, Susannah R., Bolam, Emma, Boland, Elena, Bormans, Daan, Borthwick, Nicola, Boukas, Konstantinos, Bower, Thomas, Bowring, Francesca, Boyd, Amy, Brenner, Tanja, Brown, Phillip, Brown-O'Sullivan, Charlie, Bruce, Scott, Brunt, Emily, Burbage, Jamie, Burgoyne, Joshua, Buttigieg, Karen R., Byard, Nicholas, Cabera Puig, Ingrid, Camara, Susana, Cao, Michelangelo, Cappuccini, Federica, Carr, Melanie, Carroll, Miles W., Cashen, Paul, Cavey, Ana, Chadwick, Jim, Challis, Ruth, Chapman, David, Charles, David, Chelysheva, Irina, Cho, Jee-Sun, Cifuentes, Liliana, Clark, Elizabeth, Collins, Sarah, Conlon, Christopher P., Coombes, Naomi S., Cooper, Rachel, Cooper, Cushla, Crocker, Wendy E.M., Crosbie, Sarah, Cullen, Dan, Cunningham, Christina, Cuthbertson, Fiona, Datoo, Brad E., Dando, Lynne, Datoo, Mehreen S., Datta, Chandrabali, Davies, Hannah, Davies, Sarah, Davis, Elizabeth J., Davis, Judith, Dearlove, David, Demissie, Tesfaye, Di Marco, Stefania, Di Maso, Claudio, DiTirro, Danielle, Docksey, Claire, Dong, Tao, Donnellan, Francesca R., Douglas, Naomi, Downing, Charlotte, Drake, Jonathan, Drake-Brockman, Rachael, Drury, Ruth E., Dunachie, Susanna J., Edwards, Christopher J., Edwards, Nick J., El Muhanna, Omar, Elias, Sean C., Elliott, Ryan S., Elmore, Michael J., English, Marcus Rex, Felle, Sally, Feng, Shuo, Ferreira Da Silva, Carla, Field, Samantha, Fisher, Richard, Fixmer, Carine, Ford, Karen J., Fowler, Jamie, Francis, Emma, Frater, John, Furze, Julie, Galian-Rubio, Pablo, Galloway, Celine, Garlant, Harriet, Gavrila, Madita, Gibbons, Felicity, Gibbons, Karyna, Gilbride, Ciaran, Gill, Hardeep, Godwin, Kerry, Gordon-Quayle, Katherine, Gorini, Giacomo, Goulston, Lyndsey, Grabau, Caroline, Gracie, Lara, Graham, Nichola, Greenwood, Nicola, Griffiths, Oliver, Gupta, Gaurav, Hamilton, Elizabeth, Hanumunthadu, Brama, Harris, Stephanie A., Harris, Tara, Harrison, Daisy, Hart, Thomas C., Hartnell, Birgit, Haskell, Louise, Hawkins, Sophia, Henry, John Aaron, Hermosin Herrera, Macarena, Hill, David, Hill, Jennifer, Hodges, Gina, Hodgson, Susanne H.C., Horton, Katie L., Howe, Elizabeth, Howell, Nicola, Howes, Jessica, Huang, Ben, Humphreys, Jonathan, Humphries, Holly E., Iveson, Poppy, Jackson, Frederic, Jackson, Susan, Jauregui, Sam, Jeffers, Helen, Jones, Bryony, Jones, Christine E., Jones, Elizabeth, Jones, Kathryn, Joshi, Amar, Kailath, Reshma, Keen, Jade, Kelly, Dearbhla M., Kelly, Sarah, Kelly, Debbie, Kerr, David, Khan, Liaquat, Khozoee, Baktash, Killen, Annabel, Kinch, Jasmin, King, Lloyd D.W., King, Thomas B., Kingham, Lucy, Klenerman, Paul, Knight, Julian C., Knott, Daniel, Koleva, Stanislava, Lang, Gail, Larkworthy, Colin W., Larwood, Jessica P.J., Law, Rebecca, Lee, Arlene, Lee, Kim Y.N., Lees, Emily A., Leung, Stephanie, Li, Yuanyuan, Lias, Amelia M., Linder, Aline, Lipworth, Samuel, Liu, Shuchang, Liu, Xinxue, Lloyd, Stephanie, Loew, Lisa, Lopez Ramon, Raquel, Madhavan, Meera, Mainwaring, David O., Mallett, Garry, Mansatta, Kushal, Marinou, Spyridoula, Marius, Phedra, Marlow, Emma, Marriott, Paula, Marshall, Julia L., Martin, Jane, Masters, Shauna, McEwan, Joanne, McGlashan, Joanna L., McInroy, Lorna, McRobert, Nicky, Megson, Clare, Mentzer, Alexander J., Mirtorabi, Neginsadat, Mitton, Celia, Moore, Maria, Moran, Marni, Morey, Ella, Morgans, Róisín, Morris, Susan J., Morrison, Hazel Morrison, Morshead, Gertraud, Morter, Richard, Moya, Nathifa A., Mukhopadhyay, Ekta, Muller, Jilly, Munro, Claire, Murphy, Sarah, Mweu, Philomena, Noé, Andrés, Nugent, Fay L., O'Brien, Katie, O'Connor, Daniel, Oguti, Blanché, Olchawski, Victoria, Oliveira, Catarina, O'Reilly, Peter John, Osborne, Piper, Owen, Lydia, Owino, Nelly, Papageorgiou, Panagiotis, Parracho, Helena, Parsons, Karen, Patel, Bhumika, Patrick-Smith, Maia, Peng, Yanchun, Penn, Elizabeth J., Peralta-Alvarez, Marco Polo, Perring, James, Petropoulos, Christos, Phillips, Daniel J., Pipini, Dimitra, Pollard, Samuel, Poulton, Ian, Pratt, Danny, Presland, Laura, Proud, Pamela C., Provstgaard-Morys, Samuel, Pueschel, Sophie, Pulido, David, Rabara, Ria, Radia, Kajal, Rajapaska, Durga, Ramos Lopez, Fernando, Ratcliffe, Helen, Rayhan, Sara, Rees, Byron, Reyes Pabon, Emilia, Roberts, Hannah, Robertson, Isla, Roche, Sophie, Rollier, Christine S., Romani, Rossana, Rose, Zoe, Rudiansyah, Indra, Sabheha, Sabeha, Salvador, Stephannie, Sanders, Helen, Sanders, Katherine, Satti, Iman, Sayce, Chloe, Schmid, Annina B., Schofield, Ella, Screaton, Gavin, Sedik, Cynthia, Seddiqi, Samiullah, Segireddy, Rameswara R., Selby, Beatrice, Shaik, Imam, Sharpe, Hannah R., Shaw, Robert, Shea, Adam, Silk, Sarah, Silva-Reyes, Laura, Skelly, Donal T., Smith, David J., Smith, Daniel C., Smith, Nicholas, Spencer, Alexandra J., Spoors, Louise, Stafford, Elizabeth, Stamford, Imogen, Stockdale, Lisa, Stockley, David, Stockwell, Lisa V., Stokes, Matthew, Strickland, Louise H., Stuart, Arabella, Sulaiman, Sulaiman, Summerton, Eloise, Swash, Zoe, Szigeti, Anna, Tahiri-Alaoui, Abdessamad, Tanner, Rachel, Taylor, Iona, Taylor, Keja, Taylor, Ursula, te Water Naude, Rebecca, Themistocleous, Andreas, Thomas, Merin, Thomas, Tonia M., Thompson, Amber, Thompson, Kevin, Thornton-Jones, Viv, Tinh, Lan, Tomic, Adriana, Tonks, Susan, Towner, James, Tran, Nguyen, Tree, Julian A., Truby, Adam, Turner, Cheryl, Turner, Richard, Ulaszewska, Marta, Varughese, Rachel, Verbart, Dennis, Verheul, Marije K., Vichos, Iason, Walker, Laura, Wand, Matthew E., Watkins, Bridget, Welch, Jessica, West, Alison J., White, Caroline, White, Rachel, Williams, Paul, Woodyer, Mark, Worth, Andrew T., Wright, Daniel, Wrin, Terri, Yao, Xin Li, Zbarcea, Diana-Andreea, Zizi, Dalila, Ramasamy, Maheshi N, Minassian, Angela M, Ewer, Katie J, Flaxman, Amy L, Folegatti, Pedro M, Owens, Daniel R, Voysey, Merryn, Aley, Parvinder K, Angus, Brian, Babbage, Gavin, Belij-Rammerstorfer, Sandra, Berry, Lisa, Bibi, Sagida, Bittaye, Mustapha, Cathie, Katrina, Chappell, Harry, Charlton, Sue, Cicconi, Paola, Clutterbuck, Elizabeth A, Colin-Jones, Rachel, Dold, Christina, Emary, Katherine R W, Fedosyuk, Sofiya, Fuskova, Michelle, Gbesemete, Diane, Green, Catherine, Hallis, Bassam, Hou, Mimi M, Jenkin, Daniel, Joe, Carina C D, Kelly, Elizabeth J, Kerridge, Simon, Lawrie, Alison M, Lelliott, Alice, Lwin, May N, Makinson, Rebecca, Marchevsky, Natalie G, Mujadidi, Yama, Munro, Alasdair P S, Pacurar, Mihaela, Plested, Emma, Rand, Jade, Rawlinson, Thomas, Rhead, Sarah, Robinson, Hannah, Ritchie, Adam J, Ross-Russell, Amy L, Saich, Stephen, Singh, Nisha, Smith, Catherine C, Snape, Matthew D, Song, Rinn, Tarrant, Richard, Themistocleous, Yrene, Thomas, Kelly M, Villafana, Tonya L, Warren, Sarah C, Watson, Marion E E, Douglas, Alexander D, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, Faust, Saul N, and Pollard, Andrew J

Published
2020
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12. Syntheses, structures, and photoisomerization of (E)- and (Z)-2-tert-butyl-9-(2,2,2-triphenylethylethylidene)fluorene

Author

Barr, James W., Bell, Thomas W., Catalano, Vincent J., Cline, Joseph I., Phillips, Daniel J., and Procupez, Rolando

Subjects
Isomerization -- Research, X-ray crystallography -- Usage, Tertiary butyl compounds -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

The 2-tert-butyl derivative is synthesized to investigate photoisomerization and E and Z stereoisomers of 2-tert-butyl derivative is separated and identified by X-ray crystallography. The photomisomerization study reveals significant quantum yields, despite theoretical prediction of inefficient or negligible isomerization of the parent hydrocarbon, fulvene.

Published
2005

14. Mobile Stroke Unit in the UK Healthcare System: Avoidance of Unnecessary Accident and Emergency Admissions.

Author

Grunwald, Iris Q., Phillips, Daniel J., Sexby, David, Wagner, Viola, Lesmeister, Martin, Bachhuber, Monika, Mathur, Shrey, Guyler, Paul, Fisher, James, Perera, Saman, Helwig, Stefan A., Schottek, Andrea, Ewart, Ian, Menon, Nisha, Inam Ul Haq, Muhammad, Grün, Daniel, Merzou, Fatma, Howard, Caroline, Mapplebeck, Sarah, and Dommett, David

Subjects
*STROKE units, *NATIONAL health services, *MEDICAL care, *AMBULANCE service, *STROKE patients, *TRANSIENT ischemic attack, *HOSPITAL admission & discharge
Abstract

Background: Acute stroke patients are usually transported to the nearest hospital regardless of their required level of care. This can lead to increased pressure on emergency departments and treatment delay. Objective: The aim of the study was to explore the benefit of a mobile stroke unit (MSU) in the UK National Health Service (NHS) for reduction of hospital admissions. Methods: Prospective cohort audit observation with dispatch of the MSU in the East of England Ambulance Service area in Southend-on-Sea was conducted. Emergency patients categorized as code stroke and headache were included from June 5, 2018, to December 18, 2018. Rate of avoided admission to the accident and emergency (A&E) department, rate of admission directly to target ward, and stroke management metrics were assessed. Results: In 116 MSU-treated patients, the following diagnoses were made: acute stroke, n = 33 (28.4%); transient ischaemic attacks, n = 13 (11.2%); stroke mimics, n = 32 (27.6%); and other conditions, n = 38 (32.8%). Pre-hospital thrombolysis was administered to 8 of 28 (28.6%) ischaemic stroke patients. Pre-hospital diagnosis avoided hospital admission for 29 (25.0%) patients. As hospital treatment was indicated, 35 (30.2%) patients were directly triaged to the stroke unit, 1 patient (0.9%) even directly to the catheter laboratory. Thus, only 50 (43.1%) patients required transfer to the A&E department. Moreover, the MSU enabled thrombolysis with a median dispatch-to-needle time of 42 min (interquartile range, 40–60). Conclusion: This first deployment of an MSU in the UK NHS demonstrated improved triage decision-making for or against hospital admission and admission to the appropriate target ward, thereby reducing pressure on strained A&E departments. [ABSTRACT FROM AUTHOR]

Published
2020
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15. An interdisciplinary examination of attentional focus strategies used during running gait retraining.

Author

Moore, Isabel S., Phillips, Daniel J., Ashford, Kelly J., Mullen, Richard, Goom, Thomas, and Gittoes, Marianne R. J.

Subjects
*FOOT physiology, *ATTENTION, *BIOMECHANICS, *EXERCISE, *GAIT disorders, *KINEMATICS, *LEG, *MOTOR ability, *PHYSICAL therapy, *RUNNING, *TREADMILLS, *PROMPTS (Psychology), *OXYGEN consumption, *CASE-control method
Abstract

The aim was to investigate the biomechanical, physiological, and perceptual responses to different motor learning strategies derived to elicit a flatter foot contact. Twenty‐eight rearfoot‐striking recreational runners (age 24.9 ± 2.8 years; body mass 78.8 ± 13.6 kg; height 1.79 ± 0.09 m) were matched by age, mass, and height and assigned to one verbal cue group: internal focus of attention (IF), external focus of attention (EF), and a clinically derived condition (CLIN) incorporating an IF followed by an EF statement. Participants completed two treadmill runs at 10 km h−1 for 6 minutes each: normal running (control) followed by the experimental condition (IF, EF, or CLIN). Lower limb kinematics, oxygen consumption (V˙O2), and central and peripheral ratings of perceived exertion (RPE) were recorded for each run. Compared to the control condition, foot angle was reduced in the IF (difference = 5.86°, d = 2.58) and CLIN (difference = 3.00°, d = 1.31) conditions, but unchanged in the EF condition (difference = 0.33°, d = 0.14), while greater knee flexion at initial contact in the EF and CLIN conditions was observed (difference = −5.19°, d = 1.97; difference = −3.66°, d = 1.39, respectively). A higher V˙O2 was observed in the CLIN condition (difference = −4.56 mL kg−1 min−1, d = 2.29), but unchanged in the IF (difference = −1.87 mL kg−1 min−1, d = 0.94) and EF conditions (difference = −0.37 mL kg−1 min−1, d = 0.19). All experimental conditions increased central and peripheral RPE (difference = −1.08, d = 0.54 and difference = −2.39, d = 1.33, respectively). Providing gait retraining instructions using an internally directed focus of attention was the most effective way to target specific changes in running kinematics, with no detrimental effect on physiological responses. Yet, perceptual effort responses increased regardless of the type of cue provided. [ABSTRACT FROM AUTHOR]

Published
2019
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17. Buccal bone thickness adjacent to virtual dental implants following guided bone regeneration.

Author

Phillips, Daniel J., Swenson, Dane T., and Johnson, Thomas M.

Abstract

Background: Crestal bone thickness is a critical determinant of peri-implant tissue stability. This retrospective observational study sought to quantify the buccal bone thickness achieved adjacent to virtual dental implants following guided bone regeneration (GBR) surgery and evaluate the influence of patient- and procedure-related variables on buccal bone thickness.Methods: Cone-beam computed tomography (CBCT) images acquired from patients who had undergone GBR surgery between July 1, 2012, and November 7, 2016, were used for this analysis. In all cases, the GBR procedure involved a dense polytetrafluoroethylene (dPTFE) barrier membrane and a mineralized cortical particulate freeze-dried bone allograft (FDBA). Eighty-four virtual dental implants were placed at planned locations using CBCT images from 84 patients, and the adjacent buccal bone thickness was measured at each site. The effects of sex, age, estimated baseline ridge width, number of missing teeth in site, site type (tooth-bounded versus terminal position in arch), dental arch (mandibular or maxillary), arch location (anterior or posterior), smoking status, titanium reinforcement in the membrane, membrane fixation, and tenting screw use were assessed.Results: The mean post-GBR buccal bone thickness adjacent to virtual dental implants was 2.24 ± 1.01 mm. Fifty-nine of 84 virtual implants (70%) exhibited buccal bone thickness > 1.9 mm. GBR sites using membrane fixation produced significantly greater virtual implant buccal bone thickness than those without membrane fixation (2.31 ± 0.96 versus 1.15 ± 1.25 mm, P = 0.012). Virtual implant buccal bone thickness also exhibited moderate correlation with estimated initial ridge width (r = 0.43, P < 0.0001). The alveolar ridge at 81 virtual implant sites (96%) was classified as good or satisfactory, meaning dental implants were actually placed at these sites, with or without additional grafting at implant placement.Conclusions: Observations in this study suggest GBR procedures using dPTFE membranes and FDBA result in favorable ridge dimensions for dental implant placement in most cases. However, additional augmentation at implant surgery may be necessary at ≈ 30% of sites, if buccal bone thickness > 1.9 mm is intended. [ABSTRACT FROM AUTHOR]

Published
2019
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18. Identification of the anti-mycobacterial functional properties of piperidinol derivatives.

Author

Guy, Collette S, Tichauer, Esther, Kay, Gemma L, Phillips, Daniel J, Bailey, Trisha L, Harrison, James, Furze, Christopher M, Millard, Andrew D, Gibson, Matthew I, Pallen, Mark J, and Fullam, Elizabeth

Subjects
TUBERCULOSIS, MYCOBACTERIAL diseases, DRUG resistance in bacteria, GRAM-negative bacteria, AEROMONADACEAE, ANTIBIOTICS, BIOCHEMISTRY, CELL physiology, DOSE-effect relationship in pharmacology, ESCHERICHIA coli, GENETIC polymorphisms, GRAM-positive bacteria, PHENOMENOLOGY, MICROBIAL sensitivity tests, MOLECULAR structure, PIPERIDINE, PSEUDOMONAS, RESEARCH funding, CANCER cell culture, PHARMACODYNAMICS
Abstract

Background and Purpose: Tuberculosis (TB) remains a major global health threat and is now the leading cause of death from a single infectious agent worldwide. The current TB drug regimen is inadequate, and new anti-tubercular agents are urgently required to be able to successfully combat the increasing prevalence of drug-resistant TB. The purpose of this study was to investigate a piperidinol compound derivative that is highly active against the Mycobacterium tuberculosis bacillus.Experimental Approach: The antibacterial properties of the piperidinol compound and its corresponding bis-Mannich base analogue were evaluated against M. smegmatis and Gram-negative organisms. Cytotoxicity studies were undertaken in order to determine the selectivity index for these compounds. Spontaneous resistant mutants of M. smegmatis were generated against the piperidinol and corresponding bis-Mannich base lead derivatives and whole genome sequencing employed to determine the genetic modifications that lead to selection pressure in the presence of these compounds.Key Results: The piperidinol and the bis-Mannich base analogue were found to be selective for mycobacteria and rapidly kill this organism with a cytotoxicity selectivity index for mycobacteria of >30-fold. Whole genome sequencing of M. smegmatis strains resistant to the lead compounds led to the identification of a number of single nucleotide polymorphisms indicating multiple targets.Conclusion and Implications: Our results indicate that the piperidinol moiety represents an attractive compound class in the pursuit of novel anti-tubercular agents.Linked Articles: This article is part of a themed section on Drug Metabolism and Antibiotic Resistance in Micro-organisms. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.14/issuetoc. [ABSTRACT FROM AUTHOR]

Published
2017
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19. Evaluation of the Antimicrobial Activity of Cationic Polymers against Mycobacteria: Toward Antitubercular Macromolecules.

Author

Phillips, Daniel J., Harrison, James, Richards, Sarah-Jane, Mitchell, Daniel E., Tichauer, Esther, Hubbard, Alasdair T. M., Guy, Collette, Hands-Portman, Ian, Fullam, Elizabeth, and Gibson, Matthew I.

Subjects
*CATIONIC polymers, *ANTI-infective agents, *MYCOBACTERIA
Abstract

Antimicrobial resistance is a global healthcare problem with a dwindling arsenal of usable drugs. Tuberculosis, caused by Mycobacterium tuberculosis, requires long-term combination therapy and multi- and totally drug resistant strains have emerged. This study reports the antibacterial activity of cationic polymers against mycobacteria, which are distinguished from other Gram-positive bacteria by their unique cell wall comprising a covalently linked mycolic acid–arabinogalactan–peptidoglycan complex (mAGP), interspersed with additional complex lipids which helps them persist in their host. The present study finds that poly(dimethylaminoethyl methacrylate) has particularly potent antimycobacterial activity and high selectivity over two Gram-negative strains. Removal of the backbone methyl group (poly(dimethylaminoethyl acrylate)) decreased antimycobacterial activity, and poly(aminoethyl methacrylate) also had no activity against mycobacteria. Hemolysis assays revealed poly(dimethylaminoethyl methacrylate) did not disrupt red blood cell membranes. Interestingly, poly(dimethylaminoethyl methacrylate) was not found to permeabilize mycobacterial membranes, as judged by dye exclusion assays, suggesting the mode of action is not simple membrane disruption, supported by electron microscopy analysis. These results demonstrate that synthetic polycations, with the correctly tuned structure are useful tools against mycobacterial infections, for which new drugs are urgently required. [ABSTRACT FROM AUTHOR]

Published
2017
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20. Co-operative transitions of responsive-polymer coated gold nanoparticles; precision tuning and direct evidence for co-operative aggregation.

Author

Won, Sangho, Phillips, Daniel J., Walker, Marc, and Gibson, Matthew I.

Abstract

Responsive polymers and polymer-coated nanoparticles have many potential bio-applications with the crucial parameter being the exact temperature where the transition occurs. Chemical modification of hydrophobic/hydrophilic or ligand binding sites has been widely explored as a tool for controlling this transition, but requires the synthesis of many different components to achieve precise control. This study reports an extensive investigation into the use of blending (i.e. mixing) as a powerful tool to modulate the transition temperature of poly(N-isopropylacrylamide) (PNIPAM) coated gold nanoparticles. By simply mixing two nanoparticles of different compositions, precise control over the transition temperature can be imposed. This was shown to be flexible to all possible mixing parameters (different polymers on different particles, different polymers on same particles and different sized particles with identical/different polymers). Evidence of the co-operative aggregation of differently sized nanoparticles (with different cloud points) is shown using transmission electron microscopy; particles with higher cloud points aggregate with those with lower cloud points with homo-aggregates not seen, demonstrating the co-operative behaviour. These interactions, and the opportunities for transition tuning will have implications in the rational design of responsive biomaterials. [ABSTRACT FROM AUTHOR]

Published
2016
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22. Siderophore-inspired nanoparticle-based biosensor for the selective detection of Fe3+[†].

Author

Phillips, Daniel J., Davies, Gemma-Louise, and Gibson, Matthew I.

Abstract

Inspired by nature's exploitation of the 1,2-dihydroxybenzene unit (or catechol) in mammalian and bacterial siderophores, we report the first example of a nanoparticle sensing system that utilises the strong catechol- Fe3+ binding motif to trigger nanoparticle aggregation, promoting a powerful optical response. Gold nanoparticles are functionalised with RAFT polymerisation-prepared water-soluble poly(N-hydroxyethyl acrylamide) containing a catechol moiety at the a-chain-end. A strong red-to-purple colorimetric response occurs in the presence of Fe3+ at serum concentrations (8-25 μM) in saline solution. Sodium chloride is critical in generating a strong optical output, as is the length of polymer used to coat the AuNPs. This behaviour is also demonstrated to be selective for Fe3+ over a host of other biologically relevant ions. [ABSTRACT FROM AUTHOR]

Published
2015
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23. Redox-Sensitive Materials for Drug Delivery: Targeting the Correct Intracellular Environment, Tuning Release Rates, and Appropriate Predictive Systems.

Author

Phillips, Daniel J. and Gibson, Matthew I.

Subjects
*OXIDATION-reduction reaction, *DRUG delivery systems, *PHARMACOKINETICS, *REDUCING agents, *GLUTATHIONE
Abstract

Significance: The development of responsive drug delivery systems (DDS) holds great promise as a tool for improving the pharmacokinetic properties of drug compounds. Redox-sensitive systems are particularly attractive given the rich variety of redox gradients present in vivo. These gradients, where the circulation is generally considered oxidizing and the cellular environment is substantially more reducing, provide attractive options for targeted, specific cargo delivery. Recent Advances: Experimental evidence suggests that a 'one size fits all' redox gradient does not exist. Rather, there are subtle differences in redox potential within a cell, while the chemical nature of reducing agents in these microenvironments varies. Recent works have demonstrated an ability to modulate the degradation rate of redox-susceptible groups and, hence, provide new tools to engineer precision-targeted DDS. Critical Issues: Modern synthetic and macromolecular chemistry provides access to a wide range of redox-susceptible architectures. However, in order to utilize these in real applications, the actual chemical nature of the redox-susceptible group, the sub-cellular location being targeted, and the redox microenvironment being encountered should be considered in detail. This is critical to avoid the over-simplification possible when using non-biological reducing agents, which may provide inaccurate kinetic information, and to ensure these materials can be advanced beyond simple 'on/off' systems. Furthermore, a strong case can be made for the use of biorelevant reducing agents such as glutathione when demonstrating a materials redox response. Future Directions: A further understanding of the complexities of the extra- and intracellular microenvironments would greatly assist with the design and application of DDS. Antioxid. Redox Signal. 21, 786-803. [ABSTRACT FROM AUTHOR]

Published
2014
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25. Molecular Sieving on the Surface of a Protein Provides Protection Without Loss of Activity.

Author

Liu, Mi, Tirino, Pasquale, Radivojevic, Milos, Phillips, Daniel J., Gibson, Matthew I., Leroux, Jean‐Christophe, and Gauthier, Marc A.

Subjects
MOLECULAR sieves, CELL surface antigens, METABOLIC conjugation, MONOMOLECULAR films, POLYMERIZATION, PERMEABILITY
Abstract

Tethering polymers to surfaces represents the cornerstone of a wide range of applications, including the stabilization of colloids/biomolecules and the preparation of functional coatings. Unfortunately, despite the prevalence of protein-tethered polymers in the pharmaceutical sector, the analysis of such polymer monolayers on a molecular level is difficult. In this work, simple 1H NMR spectroscopy and the catalytic properties of α-chymotrypsin are used to analyze the conformational/permeability properties of protein-bound monolayers of poly(oligoethyleneglycol monomethylether methacrylate) (pOEGMA), a biocompatible comb-polymer of interest in the biomedical field. By analyzing >100 distinct conjugates of α-chymotrypsin and pOEGMA, a detailed picture of the behavior of pOEGMA on the surface of a protein was obtained. Remarkably, control of polymer conformation and inter-penetration produced a thus far overlooked molecular sieving effect. The application of this effect for the 'smart' PEGylation of proteins is portrayed, from which insight is provided for the design of other therapeutic bioconjugates and functional coatings with selective permeability properties. [ABSTRACT FROM AUTHOR]

Published
2013
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27. “Isothermal” LCST transitions triggered by bioreduction of single polymer end-groups.

Author

Summers, Matthew J., Phillips, Daniel J., and Gibson, Matthew I.

Subjects
*PYRIDYL compounds, *GLUTATHIONE, *MACROMOLECULES, *OLIGOPEPTIDES, *POLYMERS
Abstract

The α-termini of RAFT-derived thermoresponsive polymers were functionalised via thiol exchange with pyridyl disulfide. Addition of hydrophilic end-groups dramatically increased the observed cloud point of the polymers, without changing the composition of the main chain. Selective cleavage of the disulfide-linked end-groups was observed under conditions intended to mimic intracellular glutathione concentration. This allowed the thermoresponsive behaviour to be ‘switched on’ without the need for a temperature stimulus – an ‘isothermal’ switch. [ABSTRACT FROM AUTHOR]

Published
2013
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28. Implementation and adherence to regular asymptomatic testing in a COVID-19 vaccine trial.

Author

Williams, Lucy R., Emary, Katherine R.W., Phillips, Daniel J., Hay, Jodie, Larwood, Jessica P.J., Ramasamy, Maheshi N., Pollard, Andrew J., Grassly, Nicholas C., and Voysey, Merryn

Subjects
*CLINICAL trials, *PANDEMIC preparedness, *COVID-19 vaccines, *VACCINE trials, *MEDICAL research
Abstract

For pathogens which cause infections that present asymptomatically, evaluating vaccine efficacy (VE) against asymptomatic infection is important for understanding a vaccine's potential epidemiological impact. Regular testing for subclinical infections is a potentially valuable strategy but its success hinges on participant adherence and minimising false positives. This paper describes the implementation and adherence to weekly testing in a COVID-19 vaccine trial. COV002 was a phase 2/3 trial assessing the ChAdOx1 nCoV-19 vaccine against SARS-CoV-2. Asymptomatic infections were detected using weekly self-administered swabs for RT-PCR testing. We analysed adherence using mixed-effects regression models and estimated the probability of true and false positive asymptomatic infections using estimates of adherence and testing characteristics. 356,551 tests were self-administered by 10,811 participants during the 13-month follow-up. Median adherence was 75.0% (IQR 42·6–90·9), which translated to a 74·5% (IQR 50·9–78·8) probability of detecting a positive asymptomatic infection during the swabbing period, and between 21 and 96 false positives during VE evaluation. The odds of returning a swab declined by 8% per week and further after testing positive and unblinding. Adherence was higher in older age groups, females and non-healthcare workers. The COV002 trial demonstrated the feasibility of running a long-term regular asymptomatic testing strategy. This information could be valuable for designing future phase III vaccine trials in which infection is an outcome. UK Research and Innovation, National Institutes for Health Research (NIHR), Coalition for Epidemic Preparedness Innovations, NIHR Oxford Biomedical Research Centre, Thames Valley and South Midland's NIHR Clinical Research Network, AstraZeneca. [ABSTRACT FROM AUTHOR]

Published
2024
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30. Activation of Ice Recrystallization Inhibition Activity of Poly(vinyl alcohol) using a Supramolecular Trigger.

Author

Phillips DJ, Congdon TR, and Gibson MI

Abstract

Antifreeze (glyco)proteins (AF(G)Ps) have potent ice recrystallisation inhibition (IRI) activity - a desirable phenomenon in applications such as cryopreservation, frozen food and more. In Nature AF(G)P activity is regulated by protein expression levels in response to an environmental stimulus; temperature. However, this level of regulation is not possible in synthetic systems. Here, a synthetic macromolecular mimic is introduced, using supramolecular assembly to regulate activity. Catechol-terminated poly(vinyl alcohol) was synthesised by RAFT polymerization. Upon addition of Fe 3+ , larger supramolecular star polymers form by assembly with two or three catechols. This increase in molecular weight effectively 'switches on' the IRI activity and is the first example of external control over the function of AFP mimetics. This provides a simple but elegant solution to the challenge of external control of AFP-mimetic function.

Published
2016
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31. One-step grafting of polymers to graphene oxide.

Author

Thomas HR, Phillips DJ, Wilson NR, Gibson MI, and Rourke JP

Abstract

The direct grafting of poly( N -isopropylacrylamide) to the basal plane of graphene oxide has been achieved in a single step: cleavage of the terminal thiocarbonylthio group on RAFT grown poly( N -isopropylacrylamide) reveals a reactive thiol that attacks the epoxides present across the surface of graphene oxide. The new composite material was characterised by a combination of SSNMR, FTIR, Raman, EDX, XPS, TGA and contact angle measurement; it shows enhanced thermal stability and solubility in water.

Published
2015
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32. Enzymatically Triggered, Isothermally Responsive Polymers: Reprogramming Poly(oligoethylene glycols) To Respond to Phosphatase.

Author

Phillips DJ, Wilde M, Greco F, and Gibson MI

Subjects
Phosphorylation, Phosphoric Monoester Hydrolases chemistry, Polyethylene Glycols chemistry, Polymers chemistry
Abstract

Polymers which can respond to externally applied stimuli have found much application in the biomedical field due to their (reversible) coil-globule transitions. Polymers displaying a lower critical solution temperature are the most commonly used, but for blood-borne (i.e., soluble) biomedical applications the application of heat is not always possible, nor practical. Here we report the design and synthesis of poly(oligoethylene glycol methacrylate)-based polymers whose cloud points are easily varied by alkaline phosphatase-mediated dephosphorylation. By fine-tuning the density of phosphate groups on the backbone, it was possible to induce an isothermal transition: A change in solubility triggered by removal of a small number of phosphate esters from the side chains activating the LCST-type response. As there was no temperature change involved, this serves as a model of a cell-instructed polymer response. Finally, it was found that both polymers were non cytotoxic against MCF-7 cells (at 1 mg·mL(-1)), which confirms promise for biomedical applications.

Published
2015
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33. Isothermally-Responsive Polymers Triggered by Selective Binding of Fe 3+ to Siderophoric Catechol End-Groups.

Author

Phillips DJ, Prokes I, Davies GL, and Gibson MI

Abstract

Thermoresponsive polymers have attracted huge interest as a way of developing smart/adaptable materials for biomedicine, particularly due to changes in their solubility above the LCST. However, temperature is not always an appropriate or desirable stimulus given the variety of other cellular microenvironments that exist, including pH, redox potentials, ionic strength, and metal ion concentration. Here, we achieve a highly specific, isothermal solubility switch for poly( N -isopropylacrylamide) by application of ferric iron (Fe 3+ ), a species implicated in a range of neurodegenerative conditions. This is achieved by the site-specific incorporation of (Fe 3+ -binding) catechol units onto the polymer chain-end, inspired by the mechanism by which bacterial siderophores sequester iron from mammalian hosts. The ability to manipulate the hydrophilicity of responsive systems without the need for a temperature gradient offers an exciting approach toward preparing increasingly selective, targeted polymeric materials.

Published
2014
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34. Biodegradable poly(disulfide)s derived from RAFT polymerization: monomer scope, glutathione degradation, and tunable thermal responses.

Author

Phillips DJ and Gibson MI

Subjects
Absorbable Implants, Acrylic Resins, Molecular Structure, Molecular Weight, Polymerization, Acrylamides chemistry, Acrylamides metabolism, Disulfides chemistry, Disulfides metabolism, Glutathione metabolism, Polymers chemistry, Polymers metabolism, Temperature
Abstract

Telechelic, RAFT (reversible addition-fragmentation chain transfer)-derived macromonomers with a pyridyl disulfide end-group were converted into high molecular weight, disulfide-linked polymers using a polycondensation, step-growth procedure. The applicability of the method to polycondense a library of macromonomers with different functionalities including (meth)acrylates and acrylamides was investigated. Side-chain sterics were found to be important as nonlinear poly(ethylene glycol) analogues, which proved incompatible with this synthetic methodology, as were methacrylates due to their pendant methyl group. This method was used to incorporate disulfide bonds into poly(N-isopropylacrylamide), pNIPAM, precursors to give dual-responsive (thermo- and redox) materials. These polymers were shown to selectively degrade in the presence of intracellular concentrations of glutathione but be stable at low concentrations. Due to the molecular weight-dependent cloud point of pNIPAM, the lower critical solution temperature behavior could be switched off by a glutathione gradient without a temperature change: an isothermal transition.

Published
2012
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35. Degradable thermoresponsive polymers which display redox-responsive LCST behaviour.

Author

Phillips DJ and Gibson MI

Abstract

Disulfide linkages were introduced into poly (N-isopropylacrylamide) by the polycondensation of a RAFT-derived, telechelic macromonomer to give degradable yet vinyl-based polymers. These polymers displayed a redox-sensitive lower critical solution temperature (LCST) with the shorter, degraded product displaying a higher LCST than its non-degraded counterpart., (This journal is © The Royal Society of Chemistry 2012)

Published
2012
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36. Thermal motion of tert-butyl groups III. tert-Butyl substituents in aromatic hydrocarbons, the view from the bottom of the well.

Author

Frey J, Khan SI, Knobler CB, Lightner DA, Maverick EF, Phillips DJ, Rappoport Z, and Trueblood KN

Abstract

The rigidity of the tert-butyl group (TBG) as a substituent in aromatic hydrocarbons is investigated, with a modified Hirshfeld test of anisotropic displacement parameters (ADPs) as a primary criterion. Four new structures are analyzed, along with low-temperature studies of a previously published crowded supermesityl dimer; three of the five structures meet the primary test. Most of the TBGs meet the Hirshfeld test at 100 K, and the ADPs are improved by omitting low-order data in the final refinement. The three most precise structures yield a wide variation in libration amplitudes (and in estimated rotation barriers) for 13 unique TBGs. A similar range of values is found in analyses of structures in the Cambridge Crystallographic Database. The libration amplitudes are calculated with the program THMA14C, with each TBG as an attached rigid group (ARG). Packing analysis suggests that large ADPs, especially for some individual TBG methyl groups, correspond to voids in the crystal. Published barriers to TBG reorientation, determined by solid-state NMR spin-lattice relaxation methods, for six related crystalline compounds are compared with barriers calculated from their crystal structure data.

Published
2010
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37. Bond angle versus torsional deformation in an overcrowded alkene: 9-(2,2,2-triphenylethylidene)fluorene.

Author

Bell TW, Catalano VJ, Drew MG, and Phillips DJ

Abstract

Competition between bond angle and torsional strain in sterically crowded alkenes generally causes twisting in tetrasubstituted alkenes, while most structurally characterized trisubstituted alkenes are planar. To investigate structural effects of steric repulsion between a planar aromatic ring and a vicinal triphenylmethyl (trityl) group, 9-(2,2,2-triphenylethylidene)fluorene (1 a) was synthesized by reaction of 9-bromomethylenefluorene with triphenylmethyllithium. For comparison with a less strained analogue, 9-ethylidenefluorene (1 b) was prepared by reaction of fluorenone with ethylmagnesium bromide. The X-ray crystal structures show that the difference between bond angles at the 9-fluorenyl carbon atom is much larger for 1 a (12.9 degrees) than 1 b (2.6 degrees). Bond angle and torsional deformations were compared theoretically (HF/6-31+G*) with the tert-butyl analogue (1 c), 1,2,2-tri-tert-butylethene (7), and 2,4,4-trimethyl-2-pentene (8) and crystallographically with six known 1,1-diaryl-2-tert-alkylethenes (2). The trisubstituted alkenes formed three groups with 1) large angle distortion with moderate twisting (1 a, 1 b, and 7), 2) moderate bending with a large range of torsional angles (2), and 3) little bending or twisting (1 b and 8). For the entire series, there appears to be a delicate balance between angle and torsional deformation, but twisting appears to produce smaller relief from steric strain than angle bending. In the crystallographically characterized trisubstituted alkenes, the choice between the two is mainly determined by more subtle packing forces.

Published
2002
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