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Connor AA, Adelman MW, Mobley CM, Moaddab M, Erhardt AJ, Hsu DE, Brombosz EW, Sanghvi M, Cheah YL, Simon CJ, Hobeika MJ, Saharia AS, Victor DW, Kodali S, Basra T, Graviss EA, Nguyen DT, Elsaiey A, Moore LW, Nigo M, Drews AL, Grimes KA, Arias CA, Li XC, Gaber AO, Ghobrial RM. Single-center Outcomes After Liver Transplantation With SARS-CoV-2-Positive Donors: An Argument for Increased Utilization. Transplant Direct 2024; 10:e1590. [PMID: 38464428 PMCID: PMC10923316 DOI: 10.1097/txd.0000000000001590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 03/12/2024] Open
Abstract
Background The COVID-19 pandemic has led to an increase in SARS-CoV-2-test positive potential organ donors. The benefits of life-saving liver transplantation (LT) must be balanced against the potential risk of donor-derived viral transmission. Although emerging evidence suggests that the use of COVID-19-positive donor organs may be safe, granular series thoroughly evaluating safety are still needed. Results of 29 consecutive LTs from COVID-19-positive donors at a single center are presented here. Methods A retrospective cohort study of LT recipients between April 2020 and December 2022 was conducted. Differences between recipients of COVID-19-positive (n = 29 total; 25 index, 4 redo) and COVID-19-negative (n = 472 total; 454 index, 18 redo) deceased donor liver grafts were compared. Results COVID-19-positive donors were significantly younger (P = 0.04) and had lower kidney donor profile indices (P = 0.04) than COVID-19-negative donors. Recipients of COVID-19-positive donor grafts were older (P = 0.04) but otherwise similar to recipients of negative donors. Donor SARS-CoV-2 infection status was not associated with a overall survival of recipients (hazard ratio, 1.11; 95% confidence interval, 0.24-5.04; P = 0.89). There were 3 deaths among recipients of liver grafts from COVID-19-positive donors. No death seemed virally mediated because there was no qualitative association with peri-LT antispike antibody titers, post-LT prophylaxis, or SARS-CoV-2 variants. Conclusions The utilization of liver grafts from COVID-19-positive donors was not associated with a decreased overall survival of recipients. There was no suggestion of viral transmission from donor to recipient. The results from this large single-center study suggest that COVID-19-positive donors may be used safely to expand the deceased donor pool.
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Affiliation(s)
- Ashton A. Connor
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - Max W. Adelman
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, HMH, Houston TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Constance M. Mobley
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - Mozhgon Moaddab
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Pharmacy, Houston Methodist Hospital, Houston, TX
| | - Alexandra J. Erhardt
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
| | - David E. Hsu
- Center for Health Data Science and Analytics, Houston Methodist Hospital, Houston, TX
| | | | - Mansi Sanghvi
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
| | - Yee Lee Cheah
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
| | - Caroline J. Simon
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
| | - Mark J. Hobeika
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - Ashish S. Saharia
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - David W. Victor
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
- Sherrie and Alan Conover Center for Liver Disease and Transplantation, Houston Methodist Hospital, Houston, TX
| | - Sudha Kodali
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
- Sherrie and Alan Conover Center for Liver Disease and Transplantation, Houston Methodist Hospital, Houston, TX
| | - Tamneet Basra
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
- Sherrie and Alan Conover Center for Liver Disease and Transplantation, Houston Methodist Hospital, Houston, TX
| | - Edward A. Graviss
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX
| | - Duc T. Nguyen
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX
- Department of Pediatrics, Baylor College of Medicine, Houston, TX
| | - Ahmed Elsaiey
- Department of Surgery, Houston Methodist Hospital, Houston, TX
| | - Linda W. Moore
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - Masayuki Nigo
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Ashley L. Drews
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Kevin A. Grimes
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Cesar A. Arias
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX
- Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Xian C. Li
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
- Immunobiology and Transplant Science Center, Houston Methodist Hospital, Houston, TX
| | - A. Osama Gaber
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
| | - R. Mark Ghobrial
- Department of Surgery, Houston Methodist Hospital, Houston, TX
- JC Walter Jr Transplant Center, Houston Methodist Hospital, Houston, TX
- Department of Surgery, Weill Cornell Medical College, New York, NY
- Sherrie and Alan Conover Center for Liver Disease and Transplantation, Houston Methodist Hospital, Houston, TX
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2
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Adelman MW, Connor AA, Hsu E, Saharia A, Mobley CM, Victor DW, Hobeika MJ, Lin J, Grimes KA, Ramos E, Pedroza C, Brombosz EW, Ghobrial RM, Arias CA. Bloodstream infections after solid organ transplantation: clinical epidemiology and antimicrobial resistance (2016-21). JAC Antimicrob Resist 2024; 6:dlad158. [PMID: 38213312 PMCID: PMC10783261 DOI: 10.1093/jacamr/dlad158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/21/2023] [Indexed: 01/13/2024] Open
Abstract
Background Solid organ transplant (SOT) recipients are at risk of bloodstream infections (BSIs) with MDR organisms (MDROs). Objectives To describe the epidemiology of BSI in the year after several types of SOT, as well as the prevalence of MDRO infections in this population. Methods We conducted a single-centre, retrospective study of kidney, liver, heart, and multi-organ transplantation patients. We examined BSIs ≤1 year from SOT and classified MDRO phenotypes for Staphylococcus aureus, enterococci, Enterobacterales, Pseudomonas aeruginosa and Candida spp. We compared BSI characteristics between SOT types and determined risk factors for 90 day mortality. Results We included 2293 patients [1251 (54.6%) kidney, 663 (28.9%) liver, 219 (9.6%) heart and 160 (7.0%) multi-organ transplant]. Overall, 8.5% of patients developed a BSI. BSIs were most common after multi-organ (23.1%) and liver (11.3%) transplantation (P < 0.001). Among 196 patients with BSI, 323 unique isolates were recovered, 147 (45.5%) of which were MDROs. MDROs were most common after liver transplant (53.4%). The most frequent MDROs were VRE (69.8% of enterococci) and ESBL-producing and carbapenem-resistant Enterobacterales (29.2% and 27.2% of Enterobacterales, respectively). Mortality after BSI was 9.7%; VRE was independently associated with mortality (adjusted OR 6.0, 95% CI 1.7-21.3). Conclusions BSI incidence after SOT was 8.5%, with a high proportion of MDROs (45.5%), especially after liver transplantation. These data, in conjunction with local antimicrobial resistance patterns and prescribing practices, may help guide empirical antimicrobial selection and stewardship practices after SOT.
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Affiliation(s)
- Max W Adelman
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX, USA
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX, USA
- Division of Pulmonary, Critical Care, and Sleep Medicine, Houston Methodist Hospital, Houston, TX, USA
- Department of Medicine, Weill Cornell Medical College, NewYork, NY, USA
| | - Ashton A Connor
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - Enshuo Hsu
- Center for Health Data Science and Analytics, Houston Methodist Hospital, Houston, TX, USA
| | - Ashish Saharia
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - Constance M Mobley
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - David W Victor
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - Mark J Hobeika
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - Jiejian Lin
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX, USA
- Department of Medicine, Weill Cornell Medical College, NewYork, NY, USA
| | - Kevin A Grimes
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX, USA
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX, USA
- Department of Medicine, Weill Cornell Medical College, NewYork, NY, USA
| | - Elizabeth Ramos
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX, USA
| | - Claudia Pedroza
- Center for Clinical Research and Evidence-Based Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | | | - R Mark Ghobrial
- Department of Surgery, Weill Cornell Medical College, New York, NY, USA
- Department of Surgery, Houston Methodist Hospital, Houston, TX, USA
- J.C. Walter, Jr. Transplant Center, Houston Methodist Hospital, Houston, TX, USA
| | - Cesar A Arias
- Division of Infectious Diseases, Department of Medicine, Houston Methodist Hospital, Houston, TX, USA
- Center for Infectious Diseases, Houston Methodist Research Institute, Houston, TX, USA
- Department of Medicine, Weill Cornell Medical College, NewYork, NY, USA
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Vasileiou S, Hill L, Kuvalekar M, Workineh AG, Watanabe A, Velazquez Y, Lulla S, Mooney K, Lapteva N, Grilley BJ, Heslop HE, Rooney CM, Brenner MK, Eagar TN, Carrum G, Grimes KA, Leen AM, Lulla P. Allogeneic, off-the-shelf, SARS-CoV-2-specific T cells (ALVR109) for the treatment of COVID-19 in high-risk patients. Haematologica 2023; 108:1840-1850. [PMID: 36373249 PMCID: PMC10316279 DOI: 10.3324/haematol.2022.281946] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 10/31/2022] [Indexed: 07/22/2023] Open
Abstract
Defects in T-cell immunity to SARS-CoV-2 have been linked to an increased risk of severe COVID-19 (even after vaccination), persistent viral shedding and the emergence of more virulent viral variants. To address this T-cell deficit, we sought to prepare and cryopreserve banks of virus-specific T cells, which would be available as a partially HLA-matched, off-the-shelf product for immediate therapeutic use. By interrogating the peripheral blood of healthy convalescent donors, we identified immunodominant and protective T-cell target antigens, and generated and characterized polyclonal virus-specific T-cell lines with activity against multiple clinically important SARS-CoV-2 variants (including 'delta' and 'omicron'). The feasibility of making and safely utilizing such virus-specific T cells clinically was assessed by administering partially HLA-matched, third-party, cryopreserved SARS-CoV-2-specific T cells (ALVR109) in combination with other antiviral agents to four individuals who were hospitalized with COVID-19. This study establishes the feasibility of preparing and delivering off-the-shelf, SARS-CoV-2-directed, virus-specific T cells to patients with COVID-19 and supports the clinical use of these products outside of the profoundly immune compromised setting (ClinicalTrials.gov number, NCT04401410).
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Affiliation(s)
- Spyridoula Vasileiou
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX.
| | - LaQuisa Hill
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Manik Kuvalekar
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Aster G Workineh
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Ayumi Watanabe
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Yovana Velazquez
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Suhasini Lulla
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Kimberly Mooney
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Natalia Lapteva
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Bambi J Grilley
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Helen E Heslop
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Cliona M Rooney
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Malcolm K Brenner
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Todd N Eagar
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - George Carrum
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Kevin A Grimes
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Ann M Leen
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
| | - Premal Lulla
- Center for Cell and Gene Therapy, Baylor College of Medicine, Texas Children's Hospital and Houston Methodist Hospital, Houston, TX
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4
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Sweeney DA, Tuyishimire B, Ahuja N, Beigel JH, Beresnev T, Cantos VD, Castro JG, Cohen SH, Cross K, Dodd LE, Erdmann N, Fung M, Ghazaryan V, George SL, Grimes KA, Hynes NA, Julian KG, Kandiah S, Kim HJ, Levine CB, Lindholm DA, Lye DC, Maves RC, Oh MD, Paules C, Rapaka RR, Short WR, Tomashek KM, Wolfe CR, Kalil AC. Baricitinib Treatment of Coronavirus Disease 2019 Is Associated With a Reduction in Secondary Infections. Open Forum Infect Dis 2023; 10:ofad205. [PMID: 37206623 PMCID: PMC10191442 DOI: 10.1093/ofid/ofad205] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/13/2023] [Indexed: 05/21/2023] Open
Abstract
We performed a secondary analysis of the National Institutes of Health-sponsored Adaptive COVID-19 Treatment Trial (ACTT-2) randomized controlled trial and found that baricitinib was associated with a 50% reduction in secondary infections after controlling for baseline and postrandomization patient characteristics. This finding provides a novel mechanism of benefit for baricitinib and supports the safety profile of this immunomodulator for the treatment of coronavirus disease 2019.
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Affiliation(s)
- Daniel A Sweeney
- Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | | | - Neera Ahuja
- Department of Medicine, Stanford University, Palo Alto, CA, USA
| | - John H Beigel
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Tatiana Beresnev
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | - Jose G Castro
- Department of Medicine, University of Miami, Miami, FL, USA
| | - Stuart H Cohen
- Department of Internal Medicine, University of California Davis, Sacramento, CA, USA
| | | | - Lori E Dodd
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Nathan Erdmann
- Department of Medicine, University of Alabama at Birmingham (UAB), Birmingham, AL, USA
| | - Monica Fung
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Varduhi Ghazaryan
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sarah L George
- Department of Medicine, Saint Louis University and St. Louis VA Medical Center, Saint Louis, MO, USA
| | - Kevin A Grimes
- Department of Medicine, Houston Methodist, Houston, TX, USA
| | - Noreen A Hynes
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kathleen G Julian
- Department of Medicine, Pennsylvania State Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | | | - Hannah Jang Kim
- Community Health Systems Department, University of California San Francisco, San Francisco, CA, USA
- Department of Nursing, Kaiser Permanente National Patient Care Services, Oakland, CA, USA
| | - Corri B Levine
- Department of Internal Medicine Galveston, University of Texas Medical Branch, TX, USA
| | - David A Lindholm
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
- Department of Medicine, Brooke Army Medical Center, Joint Base San Antonio-Ft Sam Houston, TX, USA
| | - David C Lye
- National Centre for Infectious Diseases, Singapore, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore
- Lee Kong Chian School of Medicine, Singapore, Singapore
- Yong Loo Lin School of Medicine, Singapore, Singapore
| | - Ryan C Maves
- Departments of Internal Medicine and Anesthesiology, Wake Forest University, Winston-Salem, NC, USA
| | - Myoung-don Oh
- Department of Internal Medicine, Seoul National University Hospital College of Medicine, Seoul, Korea
| | - Catharine Paules
- Department of Medicine, Pennsylvania State Health Milton S. Hershey Medical Center, Hershey, PA, USA
| | - Rekha R Rapaka
- Department of Medicine, Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Willam R Short
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kay M Tomashek
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | - Andre C Kalil
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
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5
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Wolfe CR, Tomashek KM, Patterson TF, Gomez CA, Marconi VC, Jain MK, Yang OO, Paules CI, Palacios GMR, Grossberg R, Harkins MS, Mularski RA, Erdmann N, Sandkovsky U, Almasri E, Pineda JR, Dretler AW, de Castilla DL, Branche AR, Park PK, Mehta AK, Short WR, McLellan SLF, Kline S, Iovine NM, El Sahly HM, Doernberg SB, Oh MD, Huprikar N, Hohmann E, Kelley CF, Holodniy M, Kim ES, Sweeney DA, Finberg RW, Grimes KA, Maves RC, Ko ER, Engemann JJ, Taylor BS, Ponce PO, Larson L, Melendez DP, Seibert AM, Rouphael NG, Strebe J, Clark JL, Julian KG, de Leon AP, Cardoso A, de Bono S, Atmar RL, Ganesan A, Ferreira JL, Green M, Makowski M, Bonnett T, Beresnev T, Ghazaryan V, Dempsey W, Nayak SU, Dodd LE, Beigel JH, Kalil AC. Baricitinib versus dexamethasone for adults hospitalised with COVID-19 (ACTT-4): a randomised, double-blind, double placebo-controlled trial. Lancet Respir Med 2022; 10:888-899. [PMID: 35617986 PMCID: PMC9126560 DOI: 10.1016/s2213-2600(22)00088-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 12/22/2022]
Abstract
BACKGROUND Baricitinib and dexamethasone have randomised trials supporting their use for the treatment of patients with COVID-19. We assessed the combination of baricitinib plus remdesivir versus dexamethasone plus remdesivir in preventing progression to mechanical ventilation or death in hospitalised patients with COVID-19. METHODS In this randomised, double-blind, double placebo-controlled trial, patients were enrolled at 67 trial sites in the USA (60 sites), South Korea (two sites), Mexico (two sites), Singapore (two sites), and Japan (one site). Hospitalised adults (≥18 years) with COVID-19 who required supplemental oxygen administered by low-flow (≤15 L/min), high-flow (>15 L/min), or non-invasive mechanical ventilation modalities who met the study eligibility criteria (male or non-pregnant female adults ≥18 years old with laboratory-confirmed SARS-CoV-2 infection) were enrolled in the study. Patients were randomly assigned (1:1) to receive either baricitinib, remdesivir, and placebo, or dexamethasone, remdesivir, and placebo using a permuted block design. Randomisation was stratified by study site and baseline ordinal score at enrolment. All patients received remdesivir (≤10 days) and either baricitinib (or matching oral placebo) for a maximum of 14 days or dexamethasone (or matching intravenous placebo) for a maximum of 10 days. The primary outcome was the difference in mechanical ventilation-free survival by day 29 between the two treatment groups in the modified intention-to-treat population. Safety analyses were done in the as-treated population, comprising all participants who received one dose of the study drug. The trial is registered with ClinicalTrials.gov, NCT04640168. FINDINGS Between Dec 1, 2020, and April 13, 2021, 1047 patients were assessed for eligibility. 1010 patients were enrolled and randomly assigned, 516 (51%) to baricitinib plus remdesivir plus placebo and 494 (49%) to dexamethasone plus remdesivir plus placebo. The mean age of the patients was 58·3 years (SD 14·0) and 590 (58%) of 1010 patients were male. 588 (58%) of 1010 patients were White, 188 (19%) were Black, 70 (7%) were Asian, and 18 (2%) were American Indian or Alaska Native. 347 (34%) of 1010 patients were Hispanic or Latino. Mechanical ventilation-free survival by day 29 was similar between the study groups (Kaplan-Meier estimates of 87·0% [95% CI 83·7 to 89·6] in the baricitinib plus remdesivir plus placebo group and 87·6% [84·2 to 90·3] in the dexamethasone plus remdesivir plus placebo group; risk difference 0·6 [95% CI -3·6 to 4·8]; p=0·91). The odds ratio for improved status in the dexamethasone plus remdesivir plus placebo group compared with the baricitinib plus remdesivir plus placebo group was 1·01 (95% CI 0·80 to 1·27). At least one adverse event occurred in 149 (30%) of 503 patients in the baricitinib plus remdesivir plus placebo group and 179 (37%) of 482 patients in the dexamethasone plus remdesivir plus placebo group (risk difference 7·5% [1·6 to 13·3]; p=0·014). 21 (4%) of 503 patients in the baricitinib plus remdesivir plus placebo group had at least one treatment-related adverse event versus 49 (10%) of 482 patients in the dexamethasone plus remdesivir plus placebo group (risk difference 6·0% [2·8 to 9·3]; p=0·00041). Severe or life-threatening grade 3 or 4 adverse events occurred in 143 (28%) of 503 patients in the baricitinib plus remdesivir plus placebo group and 174 (36%) of 482 patients in the dexamethasone plus remdesivir plus placebo group (risk difference 7·7% [1·8 to 13·4]; p=0·012). INTERPRETATION In hospitalised patients with COVID-19 requiring supplemental oxygen by low-flow, high-flow, or non-invasive ventilation, baricitinib plus remdesivir and dexamethasone plus remdesivir resulted in similar mechanical ventilation-free survival by day 29, but dexamethasone was associated with significantly more adverse events, treatment-related adverse events, and severe or life-threatening adverse events. A more individually tailored choice of immunomodulation now appears possible, where side-effect profile, ease of administration, cost, and patient comorbidities can all be considered. FUNDING National Institute of Allergy and Infectious Diseases.
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Affiliation(s)
| | - Kay M Tomashek
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Thomas F Patterson
- University of Texas Health San Antonio, University Health, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | | | | | - Mamta K Jain
- University of Texas Southwestern and Parkland Health and Hospital System, Dallas, TX, USA
| | - Otto O Yang
- University of California, Los Angeles, CA, USA
| | - Catharine I Paules
- Pennsylvania State Health Milton S Hershey Medical Center, Hershey, PA, USA
| | | | - Robert Grossberg
- Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | | | | | | | - Eyad Almasri
- University of California, San Francisco, CA, USA
| | | | - Alexandra W Dretler
- Infectious Disease Specialists of Atlanta and Emory Decatur Hospital, Decatur, GA, USA
| | | | | | | | | | | | | | - Susan Kline
- The University of Minnesota Medical School, Minneapolis, MN, USA
| | - Nicole M Iovine
- University of Florida Health, Shands Hospital, Gainesville, FL, USA
| | | | | | - Myoung-Don Oh
- Seoul National University Hospital, Seoul, South Korea
| | - Nikhil Huprikar
- Walter Reed National Military Medical Center, Bethesda, MD, USA
| | | | | | | | - Eu Suk Kim
- Seoul National University Bundang Hospital, Seongnam, South Korea
| | | | | | | | | | | | | | - Barbara S Taylor
- University of Texas Health San Antonio, University Health, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | - Philip O Ponce
- University of Texas Health San Antonio, University Health, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | - LuAnn Larson
- University of Nebraska Medical Center, Omaha, NE, USA
| | | | | | | | - Joslyn Strebe
- University of Texas Southwestern and Parkland Health and Hospital System, Dallas, TX, USA
| | | | - Kathleen G Julian
- Pennsylvania State Health Milton S Hershey Medical Center, Hershey, PA, USA
| | - Alfredo Ponce de Leon
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | | | | | | | | | | | | | | | - Tyler Bonnett
- Clinical Monitoring Research Program Directorate, Frederick National Laboratory, Frederick, MD, USA
| | - Tatiana Beresnev
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Varduhi Ghazaryan
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Walla Dempsey
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Seema U Nayak
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Lori E Dodd
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - John H Beigel
- The National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Andre C Kalil
- University of Nebraska Medical Center, Omaha, NE, USA.
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6
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Kalil AC, Mehta AK, Patterson TF, Erdmann N, Gomez CA, Jain MK, Wolfe CR, Ruiz-Palacios GM, Kline S, Regalado Pineda J, Luetkemeyer AF, Harkins MS, Jackson PEH, Iovine NM, Tapson VF, Oh MD, Whitaker JA, Mularski RA, Paules CI, Ince D, Takasaki J, Sweeney DA, Sandkovsky U, Wyles DL, Hohmann E, Grimes KA, Grossberg R, Laguio-Vila M, Lambert AA, Lopez de Castilla D, Kim E, Larson L, Wan CR, Traenkner JJ, Ponce PO, Patterson JE, Goepfert PA, Sofarelli TA, Mocherla S, Ko ER, Ponce de Leon A, Doernberg SB, Atmar RL, Maves RC, Dangond F, Ferreira J, Green M, Makowski M, Bonnett T, Beresnev T, Ghazaryan V, Dempsey W, Nayak SU, Dodd L, Tomashek KM, Beigel JH. Efficacy of interferon beta-1a plus remdesivir compared with remdesivir alone in hospitalised adults with COVID-19: a double-bind, randomised, placebo-controlled, phase 3 trial. Lancet Respir Med 2021; 9:1365-1376. [PMID: 34672949 PMCID: PMC8523116 DOI: 10.1016/s2213-2600(21)00384-2] [Citation(s) in RCA: 107] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/17/2021] [Accepted: 08/20/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND Functional impairment of interferon, a natural antiviral component of the immune system, is associated with the pathogenesis and severity of COVID-19. We aimed to compare the efficacy of interferon beta-1a in combination with remdesivir compared with remdesivir alone in hospitalised patients with COVID-19. METHODS We did a double-blind, randomised, placebo-controlled trial at 63 hospitals across five countries (Japan, Mexico, Singapore, South Korea, and the USA). Eligible patients were hospitalised adults (aged ≥18 years) with SARS-CoV-2 infection, as confirmed by a positive RT-PCR test, and who met one of the following criteria suggestive of lower respiratory tract infection: the presence of radiographic infiltrates on imaging, a peripheral oxygen saturation on room air of 94% or less, or requiring supplemental oxygen. Patients were excluded if they had either an alanine aminotransferase or an aspartate aminotransferase concentration more than five times the upper limit of normal; had impaired renal function; were allergic to the study product; were pregnant or breast feeding; were already on mechanical ventilation; or were anticipating discharge from the hospital or transfer to another hospital within 72 h of enrolment. Patients were randomly assigned (1:1) to receive intravenous remdesivir as a 200 mg loading dose on day 1 followed by a 100 mg maintenance dose administered daily for up to 9 days and up to four doses of either 44 μg interferon beta-1a (interferon beta-1a group plus remdesivir group) or placebo (placebo plus remdesivir group) administered subcutaneously every other day. Randomisation was stratified by study site and disease severity at enrolment. Patients, investigators, and site staff were masked to interferon beta-1a and placebo treatment; remdesivir treatment was given to all patients without masking. The primary outcome was time to recovery, defined as the first day that a patient attained a category 1, 2, or 3 score on the eight-category ordinal scale within 28 days, assessed in the modified intention-to-treat population, defined as all randomised patients who were classified according to actual clinical severity. Safety was assessed in the as-treated population, defined as all patients who received at least one dose of the assigned treatment. This trial is registered with ClinicalTrials.gov, NCT04492475. FINDINGS Between Aug 5, 2020, and Nov 11, 2020, 969 patients were enrolled and randomly assigned to the interferon beta-1a plus remdesivir group (n=487) or to the placebo plus remdesivir group (n=482). The mean duration of symptoms before enrolment was 8·7 days (SD 4·4) in the interferon beta-1a plus remdesivir group and 8·5 days (SD 4·3) days in the placebo plus remdesivir group. Patients in both groups had a time to recovery of 5 days (95% CI not estimable) (rate ratio of interferon beta-1a plus remdesivir group vs placebo plus remdesivir 0·99 [95% CI 0·87-1·13]; p=0·88). The Kaplan-Meier estimate of mortality at 28 days was 5% (95% CI 3-7%) in the interferon beta-1a plus remdesivir group and 3% (2-6%) in the placebo plus remdesivir group (hazard ratio 1·33 [95% CI 0·69-2·55]; p=0·39). Patients who did not require high-flow oxygen at baseline were more likely to have at least one related adverse event in the interferon beta-1a plus remdesivir group (33 [7%] of 442 patients) than in the placebo plus remdesivir group (15 [3%] of 435). In patients who required high-flow oxygen at baseline, 24 (69%) of 35 had an adverse event and 21 (60%) had a serious adverse event in the interferon beta-1a plus remdesivir group compared with 13 (39%) of 33 who had an adverse event and eight (24%) who had a serious adverse event in the placebo plus remdesivir group. INTERPRETATION Interferon beta-1a plus remdesivir was not superior to remdesivir alone in hospitalised patients with COVID-19 pneumonia. Patients who required high-flow oxygen at baseline had worse outcomes after treatment with interferon beta-1a compared with those given placebo. FUNDING The National Institute of Allergy and Infectious Diseases (USA).
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Affiliation(s)
- Andre C Kalil
- University of Nebraska Medical Center, Omaha, NE, USA.
| | | | - Thomas F Patterson
- University of Texas Health San Antonio, University Health System, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | | | | | - Mamta K Jain
- University of Texas Southwestern Medical Center, Parkland Health & Hospital System, Dallas, TX, USA; UT Southwestern Medical Center, Parkland Health and Hospital System, Dallas, TX, USA
| | | | | | - Susan Kline
- University of Minnesota Medical School, Minneapolis, MN, USA
| | | | | | | | | | | | | | | | | | | | - Catharine I Paules
- Pennsylvania State Health Milton S Hershey Medical Center, Hershey, PA, USA
| | - Dilek Ince
- Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Jin Takasaki
- National Center for Global Health and Medicine, Tokyo, Japan
| | | | | | - David L Wyles
- Denver Health and Hospital Authority, Denver, CO, USA
| | | | | | - Robert Grossberg
- Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | | | | | - EuSuk Kim
- Seoul National University Bundang Hospital, Seongnam, Korea
| | - LuAnn Larson
- University of Nebraska Medical Center, Omaha, NE, USA
| | | | | | - Philip O Ponce
- University of Texas Health San Antonio, University Health System, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | - Jan E Patterson
- University of Texas Health San Antonio, University Health System, and the South Texas Veterans Health Care System, San Antonio, TX, USA
| | | | | | - Satish Mocherla
- University of Texas Southwestern Medical Center, Parkland Health & Hospital System, Dallas, TX, USA; UT Southwestern Medical Center, Parkland Health and Hospital System, Dallas, TX, USA
| | | | - Alfredo Ponce de Leon
- Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | | | | | - Ryan C Maves
- Naval Medical Center, San Diego, CA, USA; Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | | | | | | | | | - Tyler Bonnett
- Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Tatiana Beresnev
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Varduhi Ghazaryan
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Walla Dempsey
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Seema U Nayak
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Lori Dodd
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Kay M Tomashek
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - John H Beigel
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
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7
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Balogh J, Gordon Burroughs S, Boktour M, Patel S, Saharia A, Ochoa RA, McFadden R, Victor DW, Ankoma-Sey V, Galati J, Monsour HP, Fainstein V, Li XC, Grimes KA, Gaber AO, Aloia T, Ghobrial RM. Efficacy and cost-effectiveness of voriconazole prophylaxis for prevention of invasive aspergillosis in high-risk liver transplant recipients. Liver Transpl 2016; 22:163-70. [PMID: 26515643 DOI: 10.1002/lt.24365] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 08/28/2015] [Accepted: 09/19/2015] [Indexed: 12/13/2022]
Abstract
Aspergillus infection remains a significant and deadly complication after liver transplantation (LT). We sought to determine whether the antifungal prophylactic use of voriconazole reduces the incidence of invasive aspergillosis (IA) in high-risk LT recipients without prohibitively increasing cost. During the study era (April 2008 to April 2014), 339 deceased donor LTs were performed. Of those patients, 174 high-risk recipients were administered antifungal prophylaxis with voriconazole. The median biological Model for End-Stage Liver Disease score at the time of LT was 33 (range, 18-49) with 56% requiring continuous renal replacement therapy and 50% requiring ventilatory support immediately before transplantation. Diagnosis of IA was stratified as proven, probable, or possible according to previously published definitions. No IA was documented in patients receiving voriconazole prophylaxis. At 90 days after LT, the institutional cost of prophylaxis was $5324 or 5.6% of the predicted cost associated with post-LT aspergillosis. There was no documentation of resistant strains isolated from any recipient who received voriconazole. In conclusion, these data suggest that voriconazole prophylaxis is safe, clinically effective, and cost-effective in high-risk LT recipients.
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Affiliation(s)
- Julius Balogh
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Sherilyn Gordon Burroughs
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Maha Boktour
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Samir Patel
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Ashish Saharia
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Robert A Ochoa
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Robert McFadden
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Hepatology
| | - David W Victor
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Hepatology
| | - Victor Ankoma-Sey
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Hepatology
| | - Joseph Galati
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Hepatology
| | - Howard P Monsour
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Hepatology
| | - Victor Fainstein
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Infectious Disease, Department of Medicine, Houston Methodist Hospital, Houston, TX
| | - Xian C Li
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Kevin A Grimes
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Infectious Disease, Department of Medicine, Houston Methodist Hospital, Houston, TX
| | - A Osama Gaber
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
| | - Thomas Aloia
- MD Anderson Cancer Center, University of Texas, Houston, TX
| | - R Mark Ghobrial
- Sherrie and Alan Conover Center for Liver Disease and Transplantation.,Divisions of Transplantation, Department of Surgery
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8
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Abstract
Sildenafil, the active ingredient in Viagra, has been purified from commercially available tablets. The purification, using Sephadex G25 chromatography under conditions of low ionic strength, is simple and inexpensive. Sildenafil purified according to this protocol has been characterized with respect to its IC50 for PDE5, its ultraviolet absorption profile, and by collision-induced dissociation fingerprinting, positive ion nanospray, and MALDI mass spectrometry. Tritated sildenafil (6 Ci/mmol) was prepared commercially using the sildenafil purified by this protocol and was verified to retain the potency of unlabeled sildenafil. This protocol and similar procedures will allow investigators to easily isolate sufficient amounts of sildenafil or other PDE5 inhibitors for conducting biochemical and in vitro studies of drug action.
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Affiliation(s)
- S H Francis
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0615, USA.
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9
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Okhuysen PC, Rich SM, Chappell CL, Grimes KA, Widmer G, Feng X, Tzipori S. Infectivity of a Cryptosporidium parvum isolate of cervine origin for healthy adults and interferon-gamma knockout mice. J Infect Dis 2002; 185:1320-5. [PMID: 12001050 DOI: 10.1086/340132] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2001] [Revised: 01/16/2002] [Indexed: 11/03/2022] Open
Abstract
The infectivity of a Cryptosporidium parvum isolate of cervine origin (type 2, Moredun) propagated in calves was investigated simultaneously in healthy adult human volunteers and in interferon-gamma knockout (GKO) mice. After exposure to 100-3000 oocysts, 16 volunteers recorded, for a duration of 6 weeks, the number and form of stools that they passed and any symptoms that they experienced. Oocyst excretion was assessed by enzyme-linked immunosorbent assay and direct immunofluorescence assay. Eleven subjects (69%) became ill, and 8 subjects (50%) shed oocysts in stool. The median duration of illness was 169 h, and the median number of unformed stools passed was 24. The duration and intensity of symptoms were more severe than were those associated with previously studied isolates. The median infectious dose was estimated to be 300 oocysts for humans and 1 oocyst for the GKO mouse model. The Moredun isolate was more pathogenic than the reference GCH-1 isolate. The GKO mouse model of cryptosporidiosis is useful for discerning isolate-specific differences in pathogenicity.
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Affiliation(s)
- Pablo C Okhuysen
- Department of Medicine, Division of Infectious Diseases, and School of Public Health, University of Texas-Houston Health Science Center, Houston, TX 77030, USA.
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10
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Francis SH, Turko IV, Grimes KA, Corbin JD. Histidine-607 and histidine-643 provide important interactions for metal support of catalysis in phosphodiesterase-5. Biochemistry 2000; 39:9591-6. [PMID: 10924156 DOI: 10.1021/bi000392m] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Class I cyclic nucleotide phosphodiesterases (PDEs) share a catalytic domain containing 18 invariant residues. In cGMP-binding cGMP-specific PDE (PDE5), we showed previously that point mutation of nine of these profoundly decreases k(cat) when the assay is conducted in the presence of Mg(2+); seven of these are in the prototypical metal-binding motifs A and B (HX(3)HX(n)()E) that we identified earlier. Tandem arrangement of two of these metal-binding motifs in PDEs is novel, and whether residues within these motifs are involved in metal support of catalytic activity is a fundamental question in this field. This report shows that mutation of either His-607 (A motif) or His-643 (B motif) to alanine profoundly diminishes support of PDE catalysis by Mn(2+) or Mg(2+), but mutation of His-647 in B motif or of Glu in either motif does not. H607A and H643A mutants have much greater maximum catalytic rates supported by Mn(2+) than that by Mg(2+); catalytic activity of H603A mutant is supported weakly by either. In H607A and H643A, K(a)s for Mn(2+) and Mg(2+) are increased, but the effect of Mn(2+) is 2-fold greater than that of Mg(2+) in each. Mutation of any of the other conserved residues (Asn-604, Asp-644, His-675, Asp-714, and Asp-754) causes unremarkable changes in Mn(2+) or Mg(2+) support of catalysis. This study identifies specific residues in PDE5 that contribute to interactions with catalytically relevant metals. The combined data suggest that despite a high degree of sequence similarity between each HX(3)HX(n)()E motif in PDEs and certain metallo-endopeptidases, PDEs employ a distinct complement of residues for interacting with metals involved in catalysis.
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Affiliation(s)
- S H Francis
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0615, USA.
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11
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Fink TL, Francis SH, Beasley A, Grimes KA, Corbin JD. Expression of an active, monomeric catalytic domain of the cGMP-binding cGMP-specific phosphodiesterase (PDE5). J Biol Chem 1999; 274:34613-20. [PMID: 10574925 DOI: 10.1074/jbc.274.49.34613] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Phosphodiesterases (PDEs) comprise a superfamily of phosphohydrolases that degrade 3',5'-cyclic nucleotides. All known mammalian PDEs are dimeric, but the functional significance of dimerization is unknown. A deletion mutant of cGMP-binding cGMP-specific PDE (PDE5), encoding the 357 carboxyl-terminal amino acids including the catalytic domain, has been generated, expressed, and purified. The K(m) of the catalytic fragment for cGMP (5.5 +/- 0. 51 microM) compares well with those of the native bovine lung PDE5 (5.6 microM) and full-length wild type recombinant PDE5 (2 +/- 0.4 microM). The catalytic fragment and full-length PDE5 have similar IC(50) values for the inhibitors 3-isobutyl-1-methylxanthine (20 microM) and sildenafil (Viagra(TM))(4 nM). Based on measured values for Stokes radius (29 A) and sedimentation coefficient (2.9 S), the PDE5 catalytic fragment has a calculated molecular mass of 35 kDa, which agrees well with that predicted by amino acid content (43.3 kDa) and with that estimated using SDS-polyacrylamide gel electrophoresis (39 kDa). The combined data indicate that the recombinant PDE5 catalytic fragment is monomeric, and retains the essential catalytic features of the dimeric, full-length enzyme. Therefore, the catalytic activity of PDE5 holoenzyme requires neither interaction between the catalytic and regulatory domains nor interactions between subunits of the dimer.
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Affiliation(s)
- T L Fink
- Department of Molecular Physiology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0615, USA
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12
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Chu DM, Corbin JD, Grimes KA, Francis SH. Activation by cyclic GMP binding causes an apparent conformational change in cGMP-dependent protein kinase. J Biol Chem 1997; 272:31922-8. [PMID: 9395541 DOI: 10.1074/jbc.272.50.31922] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Cyclic nucleotide binding activates cyclic nucleotide-dependent protein kinases, but the molecular mechanism is unknown. In the present studies, cGMP binding to type Ialpha or type Ibeta cGMP-dependent protein kinase (PKG) caused (i) a large electronegative charge shift of each enzyme on ion exchange chromatography, (ii) an increase in the Stokes radius (>3 A) of each enzyme, and (iii) a decreased mobility of type Ibeta PKG on native gel electrophoresis. These physical changes were not detected in the monomeric form of type Ibeta PKG upon activation by cGMP. However, the results of partial proteolysis of type Ialpha PKG revealed some degree of cGMP-induced conformational change within the PKG-monomer, since cGMP binding protects the PKG-monomer against chymotryptic cleavage. The altered sensitivity to proteolysis occurs at Met-200, which is located between the B and C alpha-helices in the high affinity site (site A), and implies that the cGMP-induced structural perturbations in this region may participate in activation of dimeric PKG. The cGMP-induced conformational effects observed using the physical separation methods are likely to reflect altered interactions within the dimeric PKG that are caused by structural alterations within the subunits.
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Affiliation(s)
- D M Chu
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0615, USA
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