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5. Best Practice for Therapeutic Drug Monitoring of Infliximab: Position Statement from the International Association of Therapeutic Drug Monitoring and Clinical Toxicology

Author

Alsoud, Dahham, Moes, Dirk Jan A. R., Wang, Zhigang, Soenen, Rani, Layegh, Zohra, Barclay, Murray, Mizuno, Tomoyuki, Minichmayr, Iris K., Keizer, Ron J., Wicha, Sebastian G., Wolbink, Gertjan, Lambert, Jo, Vermeire, Séverine, de Vries, Annick, Papamichael, Konstantinos, Padullés-Zamora, Núria, and Dreesen, Erwin

Published
2024
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9. HLA-DP on Epithelial Cells Enables Tissue Damage by NKp44+ Natural Killer Cells in Ulcerative Colitis

Author

Akar, Alaa, Flemming, Cornelius, Felix, Flomm, Flosbach, Markus, Jäger, Julia, Jeromin, Niklas, Jung, Johannes, Ohms, Mareike, Reinshagen, Konrad, Rische, Johann, Sagebiel, Adrian, Sandfort, Deborah, Steinert, Fenja, Tomuschat, Christian, Wesche, Jasmin, Shifteh Abedian, Abraham, Clara, Achkar, Jean-Paul, Ahmad, Tariq, Alberts, Rudi, Alizadeh, Behrooz, Amininejad, Leila, Ananthakrishnan, Ashwin N., Andersen, Vibeke, Anderson, Carl A., Andrews, Jane M., Annese, Vito, Aumais, Guy, Baidoo, Leonard, Baldassano, Robert N., Bampton, Peter A., Barclay, Murray, Barrett, Jeffrey C., Bethge, Johannes, Bewshea, Claire, Bis, Joshua C., Bitton, Alain, BK, Thelma, Boucher, Gabrielle, Brain, Oliver, Brand, Stephan, Brant, Steven R., Cheon, Jae Hee, Chew, Angela, Cho, Judy H., Cleynen, Isabelle, Cohain, Ariella, Cooney, Rachel, Croft, Anthony, Daly, Mark J., D'Amato, Mauro, Danese, Silvio, Daryani, Naser Ebrahim, Datta, Lisa Wu, Degenhardt, Frauke, Denapiene, Goda, Denson, Lee A., Devaney, Kathy L., Dewit, Olivier, D'Inca, Renata, Drummond, Hazel E., Dubinsky, Marla, Duerr, Richard H., Edwards, Cathryn, Ellinghaus, David, Ellul, Pierre, Esaki, Motohiro, Essers, Jonah, Ferguson, Lynnette R., Festen, Eleonora A., Fleshner, Philip, Florin, Tim, Franchimont, Denis, Franke, Andre, Fuyuno, Yuta, Gearry, Richard, Georges, Michel, Gieger, Christian, Glas, Jürgen, Goyette, Philippe, Green, Todd, Griffiths, Anne M., Guthery, Stephen L., Hakonarson, Hakon, Halfvarson, Jonas, Hanigan, Katherine, Haritunians, Talin, Hart, Ailsa, Hawkey, Chris, Hayward, Nicholas K., Hedl, Matija, Henderson, Paul, Hold, Georgina L., Hong, Myhunghee, Hu, Xinli, Huang, Hailiang, Hugot, Jean-Pierre, Hui, Ken Y., Imielinski, Marcin, Jazayeri, Omid, Jonaitis, Laimas, Jostins, Luke, Juyal, Garima, Chandra Juyal, Ramesh, Kalla, Rahul, Karlsen, Tom H., Kennedy, Nicholas A., Khan, Mohammed Azam, Kim, Won Ho, Kitazono, Takanari, Kiudelis, Gediminas, Kubo, Michiaki, Kugathasan, Subra, Kupcinskas, Limas, Lamb, Christopher A., de Lange, Katrina M., Latiano, Anna, Laukens, Debby, Lawrance, Ian C., Lee, James C., Lees, Charlie W., Leja, Marcis, Lewis, Nina, Van Limbergen, Johan, Lionetti, Paolo, Liu, Jimmy Z., Louis, Edouard, Luo, Yang, Mahy, Gillian, Malekzadeh, Masoud Mohammad, Malekzadeh, Reza, Mansfield, John, Marriott, Suzie, Massey, Dunecan, Mathew, Christopher G., Matsui, Toshiyuki, McGovern, Dermot P.B., van der Meulen, Andrea, Midha, Vandana, Milgrom, Raquel, Mirzaei, Samaneh, Mitrovic, Mitja, Montgomery, Grant W., Mowat, Craig, Müller, Christoph, Newman, William G., Ng, Aylwin, Ng, Siew C., Evelyn Ng, Sok Meng, Nikolaus, Susanna, Ning, Kaida, Nöthen, Markus, Oikonomou, Ioannis, Okou, David, Orchard, Timothy R., Palmieri, Orazio, Parkes, Miles, Phillips, Anne, Ponsioen, Cyriel Y., Potocnik, Urõs, Poustchi, Hossein, Prescott, Natalie J., Proctor, Deborah D., Radford-Smith, Graham, Rahier, Jean- Francois, Regueiro, Miguel, Reinisch, Walter, Rieder, Florian, Rioux, John D., Roberts, Rebecca, Rogler, Gerhard, Russell, Richard K., Sanderson, Jeremy D., Sans, Miquel, Satsangi, Jack, Schadt, Eric E., Scharl, Michael, Schembri, John, Schreiber, Stefan, Schumm, L. Philip, Scott, Regan, Seielstad, Mark, Shah, Tejas, Sharma, Yashoda, Silverberg, Mark S., Simmons, Alison, Simms, Lisa A., Singh, Abhey, Skieceviciene, Jurgita, van Sommeren, Suzanne, Song, Kyuyoung, Sood, Ajit, Spain, Sarah L., Steinhart, A. Hillary, Stempak, Joanne M., Stronati, Laura, Sung, Joseph J.Y., Targan, Stephan R., Taylor, Kirstin M., Theatre, Emilie, Torkvist, Leif, Torres, Esther A., Tremelling, Mark, Uhlig, Holm H., Umeno, Junji, Vahedi, Homayon, Vasiliauskas, Eric, Velde, Anje ter, Ventham, Nicholas T., Vermeire, Severine, Verspaget, Hein W., De Vos, Martine, Walters, Thomas, Wang, Kai, Wang, Ming-Hsi, Weersma, Rinse K., Wei, Zhi, Whiteman, David, Wijmenga, Cisca, Wilson, David C., Winkelmann, Juliane, Wong, Sunny H., Xavier, Ramnik J., Yamazaki, Keiko, Yang, Suk-Kyun, Ye, Byong Duk, Zeissig, Sebastian, Zhang, Bin, Zhang, Clarence K., Zhang, Hu, Zhang, Wei, Zhao, Hongyu, Zhao, Zhen Z., Baumdick, Martin E., Niehrs, Annika, Schwerk, Maria, Hinrichs, Ole, Jordan-Paiz, Ana, Padoan, Benedetta, Wegner, Lucy H.M., Schloer, Sebastian, Zecher, Britta F., Malsy, Jakob, Joshi, Vinita R., Illig, Christin, Schröder-Schwarz, Jennifer, Möller, Kimberly J., Martin, Maureen P., Yuki, Yuko, Ozawa, Mikki, Sauter, Jürgen, Schmidt, Alexander H., Perez, Daniel, Giannou, Anastasios D., Carrington, Mary, Davis, Randall S., Schumacher, Udo, Sauter, Guido, Huber, Samuel, Puelles, Victor G., Melling, Nathaniel, Altfeld, Marcus, and Bunders, Madeleine J.

Published
2023
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11. The prevalence and clinical features of leflunomide‐associated peripheral neuropathy in patients with rheumatic disease in a New Zealand cohort.

Author

Kaur, Gursimran, Barclay, Murray, Mitchell, Joanne, Jordan, Sarah, and Stebbings, Simon

Subjects
*NERVE conduction studies, *RHEUMATOID arthritis, *PERIPHERAL neuropathy, *RHEUMATISM, *PSORIATIC arthritis
Abstract

Objective: To identify the prevalence and clinical features of leflunomide‐associated peripheral neuropathy in patients with rheumatic disease over a 42‐month observational period between January 1, 2016 and June 30, 2019. Methods: A retrospective observational study was conducted using regional prescription data identifying all patients treated with leflunomide for rheumatic diseases in the Southern District Health Board of New Zealand. Medical records were used to identify patients who developed peripheral neuropathy while receiving treatment with leflunomide. Demographic characteristics, co‐therapies, and additional risk factors for peripheral neuropathy were also recorded. Results: A total of 482 patients were identified as receiving leflunomide for the treatment of rheumatic during the study period. In total, 23 patients developed leflunomide‐induced peripheral neuropathy within the cohort giving a prevalence of 4.7%. Nerve conduction studies (NCS) performed in 18 (78.2%) of these patients confirmed a distal axonal, sensory, or sensorimotor peripheral neuropathy. The majority of patients (n = 22; 95.6%) either improved, stabilized, or resolved on cessation of the drug, with or without medication washout. Adverse symptoms were reported in association with peripheral neuropathy in 15 of the 23 patients (65.2%): these included pain, poor sleep, compromised skin integrity, poor balance, and a Charcot‐like arthropathy. Additional treatment was required to manage symptoms of peripheral neuropathy including nine patients (39%) who received pain relief. Conclusions: This study supports the previously reported association between leflunomide treatment and the development of a peripheral neuropathy. However, our findings suggest that this is more common than the previous estimates. In patients with psoriatic arthritis and previous tarsitis, there appeared to be an association with a Charcot's‐like arthropathy, a complication not previously noted in the literature. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Colchicine: the good, the bad, the ugly and how to minimize the risks.

Author

Stamp, Lisa K, Horsley, Carl, Karu, Leanne Te, Dalbeth, Nicola, and Barclay, Murray

Subjects
DRUG toxicity, RISK assessment, DRUG overdose, CULTURE, DRUG storage, COLCHICINE, AUTOINFLAMMATORY diseases, AMYLOIDOSIS, BEHCET'S disease, GOUT, INTENTION, CHONDROCALCINOSIS, SOCIAL support, DISEASE risk factors
Abstract

Colchicine has an important role in managing various conditions, including gout, familial Mediterranean fever, amyloidosis, Behçet's syndrome, recurrent pericarditis and calcium pyrophosphate deposition disease. The adverse effect profile of colchicine is well understood. However, due to its narrow therapeutic index, colchicine has been associated with overdose and fatalities. When ingested in toxic amounts, the mainstay of management is supportive care. Strategies to minimize the risk of colchicine poisoning can focus on three broad causes: unauthorized access, intentional overdose and inappropriate dosing. Culturally safe and appropriate education about storage and appropriate use of colchicine is essential to minimize the risk of overdose. [ABSTRACT FROM AUTHOR]

Published
2024
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18. Meta-analysis identifies 29 additional ulcerative colitis risk loci, increasing the number of confirmed associations to 47

Author

Anderson, Carl A, Boucher, Gabrielle, Lees, Charlie W, Franke, Andre, D'Amato, Mauro, Taylor, Kent D, Lee, James C, Goyette, Philippe, Imielinski, Marcin, Latiano, Anna, Lagacé, Caroline, Scott, Regan, Amininejad, Leila, Bumpstead, Suzannah, Baidoo, Leonard, Baldassano, Robert N, Barclay, Murray, Bayless, Theodore M, Brand, Stephan, Büning, Carsten, Colombel, Jean-Frédéric, Denson, Lee A, De Vos, Martine, Dubinsky, Marla, Edwards, Cathryn, Ellinghaus, David, Fehrmann, Rudolf SN, Floyd, James AB, Florin, Timothy, Franchimont, Denis, Franke, Lude, Georges, Michel, Glas, Jürgen, Glazer, Nicole L, Guthery, Stephen L, Haritunians, Talin, Hayward, Nicholas K, Hugot, Jean-Pierre, Jobin, Gilles, Laukens, Debby, Lawrance, Ian, Lémann, Marc, Levine, Arie, Libioulle, Cecile, Louis, Edouard, McGovern, Dermot P, Milla, Monica, Montgomery, Grant W, Morley, Katherine I, Mowat, Craig, Ng, Aylwin, Newman, William, Ophoff, Roel A, Papi, Laura, Palmieri, Orazio, Peyrin-Biroulet, Laurent, Panés, Julián, Phillips, Anne, Prescott, Natalie J, Proctor, Deborah D, Roberts, Rebecca, Russell, Richard, Rutgeerts, Paul, Sanderson, Jeremy, Sans, Miquel, Schumm, Philip, Seibold, Frank, Sharma, Yashoda, Simms, Lisa A, Seielstad, Mark, Steinhart, A Hillary, Targan, Stephan R, van den Berg, Leonard H, Vatn, Morten, Verspaget, Hein, Walters, Thomas, Wijmenga, Cisca, Wilson, David C, Westra, Harm-Jan, Xavier, Ramnik J, Zhao, Zhen Z, Ponsioen, Cyriel Y, Andersen, Vibeke, Torkvist, Leif, Gazouli, Maria, Anagnou, Nicholas P, Karlsen, Tom H, Kupcinskas, Limas, Sventoraityte, Jurgita, Mansfield, John C, Kugathasan, Subra, Silverberg, Mark S, Halfvarson, Jonas, Rotter, Jerome I, Mathew, Christopher G, Griffiths, Anne M, Gearry, Richard, Ahmad, Tariq, Brant, Steven R, and Chamaillard, Mathias

Subjects
Biological Sciences, Genetics, Autoimmune Disease, Human Genome, Crohn's Disease, Digestive Diseases, Nutrition, Inflammatory Bowel Disease, Prevention, Oral and gastrointestinal, Colitis, Ulcerative, Crohn Disease, Genome-Wide Association Study, Humans, Risk, Medical and Health Sciences, Developmental Biology, Agricultural biotechnology, Bioinformatics and computational biology
Abstract

Genome-wide association studies and candidate gene studies in ulcerative colitis have identified 18 susceptibility loci. We conducted a meta-analysis of six ulcerative colitis genome-wide association study datasets, comprising 6,687 cases and 19,718 controls, and followed up the top association signals in 9,628 cases and 12,917 controls. We identified 29 additional risk loci (P < 5 × 10(-8)), increasing the number of ulcerative colitis-associated loci to 47. After annotating associated regions using GRAIL, expression quantitative trait loci data and correlations with non-synonymous SNPs, we identified many candidate genes that provide potentially important insights into disease pathogenesis, including IL1R2, IL8RA-IL8RB, IL7R, IL12B, DAP, PRDM1, JAK2, IRF5, GNA12 and LSP1. The total number of confirmed inflammatory bowel disease risk loci is now 99, including a minimum of 28 shared association signals between Crohn's disease and ulcerative colitis.

Published
2011

20. A Method to Exploit the Structure of Genetic Ancestry Space to Enhance Case-Control Studies

Author

Barclay, Murray, Peyrin-Biroulet, Laurent, Chamaillard, Mathias, Colombel, Jean-Frederick, Cottone, Mario, Croft, Anthony, D’Incà, Renata, Halfvarson, Jonas, Hanigan, Katherine, Henderson, Paul, Hugot, Jean-Pierre, Karban, Amir, Kennedy, Nicholas A., Khan, Mohammed Azam, Lémann, Marc, Levine, Arie, Massey, Dunecan, Milla, Monica, Montgomery, Grant W., Ng, Sok Meng Evelyn, Oikonomou, Ioannis, Peeters, Harald, Proctor, Deborah D., Rahier, Jean-Francois, Roberts, Rebecca, Rutgeerts, Paul, Seibold, Frank, Stronati, Laura, Taylor, Kirstin M., Törkvist, Leif, Ublick, Kullak, Van Limbergen, Johan, Van Gossum, Andre, Vatn, Morten H., Zhang, Hu, Zhang, Wei, Andrews, Jane M., Bampton, Peter A., Florin, Timothy H., Gearry, Richard, Krishnaprasad, Krupa, Lawrance, Ian C., Mahy, Gillian, Radford-Smith, Graham, Roberts, Rebecca L., Simms, Lisa A., Amininijad, Leila, Cleynen, Isabelle, Dewit, Olivier, Franchimont, Denis, Georges, Michel, Laukens, Debby, Theatre, Emilie, Van Gossum, André, Vermeire, Severine, Aumais, Guy, Baidoo, Leonard, Barrie, Arthur M., III, Beck, Karen, Bernard, Edmond-Jean, Binion, David G., Bitton, Alain, Brant, Steve R., Cho, Judy H., Cohen, Albert, Croitoru, Kenneth, Daly, Mark J., Datta, Lisa W., Deslandres, Colette, Duerr, Richard H., Dutridge, Debra, Ferguson, John, Fultz, Joann, Goyette, Philippe, Greenberg, Gordon R., Haritunians, Talin, Jobin, Gilles, Katz, Seymour, Lahaie, Raymond G., McGovern, Dermot P., Nelson, Linda, Ng, Sok Meng, Ning, Kaida, Paré, Pierre, Regueiro, Miguel D., Rioux, John D., Ruggiero, Elizabeth, Schumm, L. Philip, Schwartz, Marc, Scott, Regan, Sharma, Yashoda, Silverberg, Mark S., Spears, Denise, Steinhart, A. Hillary, Stempak, Joanne M., Swoger, Jason M., Tsagarelis, Constantina, Zhang, Clarence, Zhao, Hongyu, Aerts, Jan, Ahmad, Tariq, Arbury, Hazel, Attwood, Anthony, Auton, Adam, Ball, Stephen G., Balmforth, Anthony J., Barnes, Chris, Barrett, Jeffrey C., Barroso, Inês, Barton, Anne, Bennett, Amanda J., Bhaskar, Sanjeev, Blaszczyk, Katarzyna, Bowes, John, Brand, Oliver J., Braund, Peter S., Bredin, Francesca, Breen, Gerome, Brown, Morris J., Bruce, Ian N., Bull, Jaswinder, Burren, Oliver S., Burton, John, Byrnes, Jake, Caesar, Sian, Cardin, Niall, Clee, Chris M., Coffey, Alison J., Connell, John M.C., Conrad, Donald F., Cooper, Jason D., Dominiczak, Anna F., Downes, Kate, Drummond, Hazel E., Dudakia, Darshna, Dunham, Andrew, Ebbs, Bernadette, Eccles, Diana, Edkins, Sarah, Edwards, Cathryn, Elliot, Anna, Emery, Paul, Evans, David M., Evans, Gareth, Eyre, Steve, Farmer, Anne, I, Ferrier, Nicol, Flynn, Edward, Forbes, Alistair, Forty, Liz, Franklyn, Jayne A., Frayling, Timothy M., Freathy, Rachel M., Giannoulatou, Eleni, Gibbs, Polly, Gilbert, Paul, Gordon-Smith, Katherine, Gray, Emma, Green, Elaine, Groves, Chris J., Grozeva, Detelina, Gwilliam, Rhian, Hall, Anita, Hammond, Naomi, Hardy, Matt, Harrison, Pile, Hassanali, Neelam, Hebaishi, Husam, Hines, Sarah, Hinks, Anne, Hitman, Graham A., Hocking, Lynne, Holmes, Chris, Howard, Eleanor, Howard, Philip, Howson, Joanna M.M., Hughes, Debbie, Hunt, Sarah, Isaacs, John D., Jain, Mahim, Jewell, Derek P., Johnson, Toby, Jolley, Jennifer D., Jones, Ian R., Jones, Lisa A., Kirov, George, Langford, Cordelia F., Lango-Allen, Hana, Lathrop, G. Mark, Lee, James, Lee, Kate L., Lees, Charlie, Lewis, Kevin, Lindgren, Cecilia M., Maisuria-Armer, Meeta, Maller, Julian, Mansfield, John, Marchini, Jonathan L., Martin, Paul, Massey, Dunecan C.O., McArdle, Wendy L., McGuffin, Peter, McLay, Kirsten E., McVean, Gil, Mentzer, Alex, Mimmack, Michael L., Morgan, Ann E., Morris, Andrew P., Mowat, Craig, Munroe, Patricia B., Myers, Simon, Newman, William, Nimmo, Elaine R., O’Donovan, Michael C., Onipinla, Abiodun, Ovington, Nigel R., Owen, Michael J., Palin, Kimmo, Palotie, Aarno, Parnell, Kirstie, Pearson, Richard, Pernet, David, Perry, John R.B., Phillips, Anne, Plagnol, Vincent, Prescott, Natalie J., Prokopenko, Inga, Quail, Michael A., Rafelt, Suzanne, Rayner, Nigel W., Reid, David M., Renwick, Anthony, Ring, Susan M., Robertson, Neil, Robson, Samuel, Russell, Ellie, St Clair, David, Sambrook, Jennifer G., Sanderson, Jeremy D., Sawcer, Stephen J., Schuilenburg, Helen, Scott, Carol E., Scott, Richard, Seal, Sheila, Shaw-Hawkins, Sue, Shields, Beverley M., Simmonds, Matthew J., Smyth, Debbie J., Somaskantharajah, Elilan, Spanova, Katarina, Steer, Sophia, Stephens, Jonathan, Stevens, Helen E., Stirrups, Kathy, Stone, Millicent A., Strachan, David P., Su, Zhan, Symmons, Deborah P.M., Thompson, John R., Thomson, Wendy, Tobin, Martin D., Travers, Mary E., Turnbull, Clare, Vukcevic, Damjan, Wain, Louise V., Walker, Mark, Walker, Neil M., Wallace, Chris, Warren-Perry, Margaret, Watkins, Nicholas A., Webster, John, Weedon, Michael N., Wilson, Anthony G., Woodburn, Matthew, Wordsworth, B. Paul, Yau, Chris, Young, Allan H., Zeggini, Eleftheria, Brown, Matthew A., Burton, Paul R., Caulfield, Mark J., Compston, Alastair, Farrall, Martin, Gough, Stephen C.L., Hall, Alistair S., Hattersley, Andrew T., Hill, Adrian V.S., Mathew, Christopher G., Pembrey, Marcus, Satsangi, Jack, Stratton, Michael R., Worthington, Jane, Hurles, Matthew E., Duncanson, Audrey, Ouwehand, Willem H., Parkes, Miles, Rahman, Nazneen, Todd, John A., Samani, Nilesh J., Kwiatkowski, Dominic P., McCarthy, Mark I., Craddock, Nick, Deloukas, Panos, Donnelly, Peter, Blackwell, Jenefer M., Bramon, Elvira, Casas, Juan P., Corvin, Aiden, Jankowski, Janusz, Markus, Hugh S., Palmer, Colin N.A., Plomin, Robert, Rautanen, Anna, Trembath, Richard C., Viswanathan, Ananth C., Wood, Nicholas W., Spencer, Chris C.A., Band, Gavin, Bellenguez, Céline, Freeman, Colin, Hellenthal, Garrett, Pirinen, Matti, Strange, Amy, Blackburn, Hannah, Bumpstead, Suzannah J., Dronov, Serge, Gillman, Matthew, Jayakumar, Alagurevathi, McCann, Owen T., Liddle, Jennifer, Potter, Simon C., Ravindrarajah, Radhi, Ricketts, Michelle, Waller, Matthew, Weston, Paul, Widaa, Sara, Whittaker, Pamela, Bodea, Corneliu A., Neale, Benjamin M., Ripke, Stephan, Devlin, Bernie, and Roeder, Kathryn

Published
2016
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26. Nonsynonymous Polymorphism in Guanine Monophosphate Synthetase Is a Risk Factor for Unfavorable Thiopurine Metabolite Ratios in Patients With Inflammatory Bowel Disease

Author

Roberts, Rebecca L, Wallace, Mary C, Seinen, Margien L, van Bodegraven, Adriaan A, Krishnaprasad, Krupa, Jones, Gregory T, van Rij, Andre M, Baird, Angela, Lawrance, Ian C, Prosser, Ruth, Bampton, Peter, Grafton, Rachel, Simms, Lisa A, Studd, Corrie, Bell, Sally J, Kennedy, Martin A, Halliwell, Jacob, Gearry, Richard B, Radford-Smith, Graham, Andrews, Jane M, McHugh, Patrick C, and Barclay, Murray L

Published
2018
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47. Timing of Live Attenuated Vaccination in Infants Exposed to Infliximab or Adalimumab in Utero: A Prospective Cohort Study in 107 Children.

Author

Liu, Zheng, Julsgaard, Mette, Zhu, Xiao, Martin, Jennifer, Barclay, Murray L, Cranswick, Noel, Gibson, Peter R, Gearry, Richard B, van der Giessen, Janine, Connor, Susan J, Rosella, Ourania, Grosen, Anne, Toong, Catherine, Flanagan, Emma, Wieringa, Jantien W, Woude, C Janneke van der, Bell, Sally J, and Group, The CARINA Study

Abstract

Background and Aims For infants exposed in utero to anti-tumour necrosis factor-α [TNF] medications, it is advised that live-attenuated vaccinations be postponed until the drug is cleared, but little is known about time to clearance. To minimize delays before live-attenuated vaccination can be given, we aimed to develop a pharmacokinetic model to predict time-to-clearance in infants exposed during pregnancy. Methods We prospectively followed in utero infliximab/adalimumab-exposed infants of mothers with inflammatory bowel disease across four countries between 2011 and 2018. Infants with a detectable anti-TNF umbilical-cord level and at least one other blood sample during the first year of life were included. Results Overall, 107 infants were enrolled, including 166 blood samples from 71 infliximab-exposed infants and 77 samples from 36 adalimumab-exposed infants. Anti-TNF was detectable in 23% [ n  = 25] of infants at 6 months. At 12 months, adalimumab was not detected but 4% [ n  = 3] had detectable infliximab. A Bayesian forecasting method was developed using a one-compartment pharmacokinetic model. Model validation showed that the predicted clearing time was in accordance with the measured observations. A clinician-friendly online calculator was developed for calculating full anti-TNF clearing time: https://xiaozhu.shinyapps.io/antiTNFcalculator2/. Conclusions Almost one-quarter of infants born to mothers receiving anti-TNF during pregnancy have detectable anti-TNF at 6 months. To limit the time to live-attenuated vaccination in infants of mothers receiving anti-TNF during pregnancy, the results of a cord drug level at birth and a second sample ≥ 1 month thereafter can be used to estimate the time for full anti-TNF clearance in these children. [ABSTRACT FROM AUTHOR]

Published
2022
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