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Prather AA, Gao Y, Betancourt L, Kordahl RC, Sriram A, Huang CY, Hays SR, Kukreja J, Calabrese DR, Venado A, Kapse B, Greenland JR, Singer JP. Disturbed sleep after lung transplantation is associated with worse patient-reported outcomes and chronic lung allograft dysfunction. medRxiv 2024:2023.10.12.23296973. [PMID: 37873197 PMCID: PMC10593057 DOI: 10.1101/2023.10.12.23296973] [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] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Many lung transplant recipients fail to derive the expected improvements in functioning, HRQL, or long-term survival. Sleep may represent an important, albeit rarely examined, factor influencing lung transplant outcomes. Within a larger cohort study, 141 lung transplant recipients completed the Medical Outcomes Study (MOS) Sleep Scale along with a broader survey of patient-reported outcome (PRO) measures and frailty assessment. MOS Sleep yields the Sleep Problems Index (SPI); we also derived an insomnia-specific subscale. Potential perioperative predictors of disturbed sleep and time to chronic lung allograft dysfunction (CLAD) and death were derived from medical records. We investigated associations between perioperative predictors on SPI and Insomnia and associations between SPI and Insomnia on PROs and frailty by linear regressions, adjusting for age, sex, and lung function. We evaluated the associations between SPI and Insomnia on time to CLAD and death using Cox models, adjusting for age, sex, and transplant indication. Post-transplant hospital length of stay >30 days was associated with worse sleep by SPI and insomnia (SPI: p=0.01; Insomnia p=0.02). Worse sleep by SPI and insomnia was associated with worse depression, cognitive function, HRQL, physical disability, health utilities, and Fried Frailty Phenotype frailty (all p<0.01). Those in the worst quartile of SPI and insomnia exhibited increased risk of CLAD (HR 2.18; 95%CI: 1.22-3.89 ; p=0.01 for SPI and HR 1.96; 95%CI 1.09-3.53; p=0.03 for insomnia). Worsening in SPI but not insomnia was also associated with mortality (HR: 1.29; 95%CI: 1.05-1.58; p=0.01). Poor sleep after lung transplant may be a novel predictor of patient reported outcomes, frailty, CLAD, and death with potentially important screening and treatment implications.
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Affiliation(s)
- Aric A Prather
- Department of Psychiatry and Behavioral Sciences, University of California, San Francisco
| | - Ying Gao
- Department of Medicine, University of California San Francisco
| | | | - Rose C Kordahl
- Department of Medicine, University of California San Francisco
| | - Anya Sriram
- Department of Medicine, University of California San Francisco
| | - Chiung-Yu Huang
- Department of Epidemiology and Biostatistics, University of California San Francisco
| | - Steven R Hays
- Department of Medicine, University of California San Francisco
| | - Jasleen Kukreja
- Department of Surgery, University of California San Francisco
| | - Daniel R Calabrese
- Department of Medicine, University of California San Francisco
- San Francisco Veterans Affairs Health Care System
| | - Aida Venado
- Department of Medicine, University of California San Francisco
| | - Bhavya Kapse
- Department of Medicine, University of California San Francisco
| | - John R Greenland
- Department of Medicine, University of California San Francisco
- San Francisco Veterans Affairs Health Care System
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Singer JP, Christie JD, Diamond JM, Anderson MA, Benvenuto LA, Gao Y, Arcasoy SM, Lederer DJ, Calabrese D, Wang P, Hays SR, Kukreja J, Venado A, Kolaitis NA, Leard LE, Shah RJ, Kleinhenz ME, Golden J, Betancourt L, Oyster M, Zaleski D, Adler J, Kalman L, Balar P, Patel S, Medikonda N, Koons B, Tevald M, Covinsky KE, Greenland JR, Katz PK. Development of the Lung Transplant Frailty Scale (LT-FS). J Heart Lung Transplant 2023; 42:892-904. [PMID: 36925382 PMCID: PMC11022684 DOI: 10.1016/j.healun.2023.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 02/02/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023] Open
Abstract
BACKGROUND Existing measures of frailty developed in community dwelling older adults may misclassify frailty in lung transplant candidates. We aimed to develop a novel frailty scale for lung transplantation with improved performance characteristics. METHODS We measured the short physical performance battery (SPPB), fried frailty phenotype (FFP), Body Composition, and serum Biomarkers representative of putative frailty mechanisms. We applied a 4-step established approach (identify frailty domain variable bivariate associations with the outcome of waitlist delisting or death; build models sequentially incorporating variables from each frailty domain cluster; retain variables that improved model performance ability by c-statistic or AIC) to develop 3 candidate "Lung Transplant Frailty Scale (LT-FS)" measures: 1 incorporating readily available clinical data; 1 adding muscle mass, and 1 adding muscle mass and research-grade Biomarkers. We compared construct and predictive validity of LT-FS models to the SPPB and FFP by ANOVA, ANCOVA, and Cox proportional-hazard modeling. RESULTS In 342 lung transplant candidates, LT-FS models exhibited superior construct and predictive validity compared to the SPPB and FFP. The addition of muscle mass and Biomarkers improved model performance. Frailty by all measures was associated with waitlist disability, poorer HRQL, and waitlist delisting/death. LT-FS models exhibited stronger associations with waitlist delisting/death than SPPB or FFP (C-statistic range: 0.73-0.78 vs. 0.57 and 0.55 for SPPB and FFP, respectively). Compared to SPPB and FFP, LT-FS models were generally more strongly associated with delisting/death and improved delisting/death net reclassification, with greater improvements with increasing LT-FS model complexity (range: 0.11-0.34). For example, LT-FS-Body Composition hazard ratio for delisting/death: 6.0 (95%CI: 2.5, 14.2), SPPB HR: 2.5 (95%CI: 1.1, 5.8), FFP HR: 4.3 (95%CI: 1.8, 10.1). Pre-transplant LT-FS frailty, but not SPPB or FFP, was associated with mortality after transplant. CONCLUSIONS The LT-FS is a disease-specific physical frailty measure with face and construct validity that has superior predictive validity over established measures.
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Affiliation(s)
- Jonathan P Singer
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA.
| | - Jason D Christie
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Joshua M Diamond
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Michaela A Anderson
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Luke A Benvenuto
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, Villanova, Pennsylvania
| | - Ying Gao
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Selim M Arcasoy
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, Villanova, Pennsylvania
| | | | - Daniel Calabrese
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA; Medical Service, San Francisco VA Health Care System, San Francisco, California
| | - Ping Wang
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Steven R Hays
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Jasleen Kukreja
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Aida Venado
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Nicholas A Kolaitis
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Lorriana E Leard
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Rupal J Shah
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Mary Ellen Kleinhenz
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Jeffrey Golden
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Legna Betancourt
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Michelle Oyster
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Derek Zaleski
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Joe Adler
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Laurel Kalman
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Priya Balar
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA
| | - Shreena Patel
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, Villanova, Pennsylvania
| | - Nikhila Medikonda
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA
| | - Brittany Koons
- College of Nursing, Villanova University, Villanova, PA, USA
| | | | - Kenneth E Covinsky
- Division of Geriatrics, Department of Medicine, University of California, San Francisco, California
| | - John R Greenland
- Division of Pulmonary and Critical Care, Department of Medicine, School of Medicine, University of California, San Francisco CA, USA; Medical Service, San Francisco VA Health Care System, San Francisco, California
| | - Patti K Katz
- Division of Rheumatology, Department of Medicine, University of California, San Francisco, California
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Singer JP, Calfee CS, Delucchi K, Diamond JM, Anderson MA, Benvenuto LA, Gao Y, Wang P, Arcasoy SM, Lederer DJ, Hays SR, Kukreja J, Venado A, Kolaitis NA, Leard LE, Shah RJ, Kleinhenz ME, Golden J, Betancourt L, Oyster M, Brown M, Zaleski D, Medikonda N, Kalman L, Balar P, Patel S, Calabrese DR, Greenland JR, Christie JD. Subphenotypes of frailty in lung transplant candidates. Am J Transplant 2023; 23:531-539. [PMID: 36740192 PMCID: PMC11005295 DOI: 10.1016/j.ajt.2023.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 12/16/2022] [Accepted: 12/30/2022] [Indexed: 02/05/2023]
Abstract
Heterogeneous frailty pathobiology might explain the inconsistent associations observed between frailty and lung transplant outcomes. A Subphenotype analysis could refine frailty measurement. In a 3-center pilot cohort study, we measured frailty by the Short Physical Performance Battery, body composition, and serum biomarkers reflecting causes of frailty. We applied latent class modeling for these baseline data. Next, we tested class construct validity with disability, waitlist delisting/death, and early postoperative complications. Among 422 lung transplant candidates, 2 class model fit the best (P = .01). Compared with Subphenotype 1 (n = 333), Subphenotype 2 (n = 89) was characterized by systemic and innate inflammation (higher IL-6, CRP, PTX3, TNF-R1, and IL-1RA); mitochondrial stress (higher GDF-15 and FGF-21); sarcopenia; malnutrition; and lower hemoglobin and walk distance. Subphenotype 2 had a worse disability and higher risk of waitlist delisting or death (hazards ratio: 4.0; 95% confidence interval: 1.8-9.1). Of the total cohort, 257 underwent transplant (Subphenotype 1: 196; Subphenotype 2: 61). Subphenotype 2 had a higher need for take back to the operating room (48% vs 28%; P = .005) and longer posttransplant hospital length of stay (21 days [interquartile range: 14-33] vs 18 days [14-28]; P = .04). Subphenotype 2 trended toward fewer ventilator-free days, needing more postoperative extracorporeal membrane oxygenation and dialysis, and higher need for discharge to rehabilitation facilities (P ≤ .20). In this early phase study, we identified biological frailty Subphenotypes in lung transplant candidates. A hyperinflammatory, sarcopenic Subphenotype seems to be associated with worse clinical outcomes.
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Affiliation(s)
- Jonathan P Singer
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA.
| | - Carolyn S Calfee
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Kevin Delucchi
- Department of Psychiatry and Behavioral Sciences, University of California, San Francisco, California, USA
| | - Joshua M Diamond
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Michaela A Anderson
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Luke A Benvenuto
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, New York City, New York, USA
| | - Ying Gao
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Ping Wang
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA; San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - Selim M Arcasoy
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, New York City, New York, USA
| | | | - Steven R Hays
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Jasleen Kukreja
- Division of Cardiothoracic Surgery, University of California, San Francisco, California, USA
| | - Aida Venado
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Nicholas A Kolaitis
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Lorianna E Leard
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Rupal J Shah
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Mary Ellen Kleinhenz
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Jeffrey Golden
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Legna Betancourt
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Michelle Oyster
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Melanie Brown
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Derek Zaleski
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Nikhila Medikonda
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA
| | - Laurel Kalman
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Priya Balar
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Shreena Patel
- Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, New York City, New York, USA
| | - Daniel R Calabrese
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA; San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - John R Greenland
- Division of Pulmonary and Critical Care, Department of Medicine, University of California, San Francisco, California, USA; San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - Jason D Christie
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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4
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Ozonoff A, Schaenman J, Jayavelu ND, Milliren CE, Calfee CS, Cairns CB, Kraft M, Baden LR, Shaw AC, Krammer F, van Bakel H, Esserman DA, Liu S, Sesma AF, Simon V, Hafler DA, Montgomery RR, Kleinstein SH, Levy O, Bime C, Haddad EK, Erle DJ, Pulendran B, Nadeau KC, Davis MM, Hough CL, Messer WB, Higuita NIA, Metcalf JP, Atkinson MA, Brakenridge SC, Corry D, Kheradmand F, Ehrlich LI, Melamed E, McComsey GA, Sekaly R, Diray-Arce J, Peters B, Augustine AD, Reed EF, Altman MC, Becker PM, Rouphael N, Ozonoff A, Schaenman J, Jayavelu ND, Milliren CE, Calfee CS, Cairns CB, Kraft M, Baden LR, Shaw AC, Krammer F, van Bakel H, Esserman DA, Liu S, Sesma AF, Simon V, Hafler DA, Montgomery RR, Kleinstein SH, Levy O, Bime C, Haddad EK, Erle DJ, Pulendran B, Nadeau KC, Davis MM, Hough CL, Messer WB, Higuita NIA, Metcalf JP, Atkinson MA, Brakenridge SC, Corry D, Kheradmand F, Ehrlich LI, Melamed E, McComsey GA, Sekaly R, Diray-Arce J, Peters B, Augustine AD, Reed EF, McEnaney K, Barton B, Lentucci C, Saluvan M, Chang AC, Hoch A, Albert M, Shaheen T, Kho AT, Thomas S, Chen J, Murphy MD, Cooney M, Presnell S, Fragiadakis GK, Patel R, Guan L, Gygi J, Pawar S, Brito A, Khalil Z, Maguire C, Fourati S, Overton JA, Vita R, Westendorf K, Salehi-Rad R, Leligdowicz A, Matthay MA, Singer JP, Kangelaris KN, Hendrickson CM, Krummel MF, Langelier CR, Woodruff PG, Powell DL, Kim JN, Simmons B, Goonewardene IM, Smith CM, Martens M, Mosier J, Kimura H, Sherman AC, Walsh SR, Issa NC, Dela Cruz C, Farhadian S, Iwasaki A, Ko AI, Chinthrajah S, Ahuja N, Rogers AJ, Artandi M, Siegel SA, Lu Z, Drevets DA, Brown BR, Anderson ML, Guirgis FW, Thyagarajan RV, Rousseau JF, Wylie D, Busch J, Gandhi S, Triplett TA, Yendewa G, Giddings O, Anderson EJ, Mehta AK, Sevransky JE, Khor B, Rahman A, Stadlbauer D, Dutta J, Xie H, Kim-Schulze S, Gonzalez-Reiche AS, van de Guchte A, Farrugia K, Khan Z, Maecker HT, Elashoff D, Brook J, Ramires-Sanchez E, Llamas M, Rivera A, Perdomo C, Ward DC, Magyar CE, Fulcher JA, Abe-Jones Y, Asthana S, Beagle A, Bhide S, Carrillo SA, Chak S, Fragiadakis GK, Ghale R, Gonzalez A, Jauregui A, Jones N, Lea T, Lee D, Lota R, Milush J, Nguyen V, Pierce L, Prasad PA, Rao A, Samad B, Shaw C, Sigman A, Sinha P, Ward A, Willmore A, Zhan J, Rashid S, Rodriguez N, Tang K, Altamirano LT, Betancourt L, Curiel C, Sutter N, Paz MT, Tietje-Ulrich G, Leroux C, Connors J, Bernui M, Kutzler MA, Edwards C, Lee E, Lin E, Croen B, Semenza NC, Rogowski B, Melnyk N, Woloszczuk K, Cusimano G, Bell MR, Furukawa S, McLin R, Marrero P, Sheidy J, Tegos GP, Nagle C, Mege N, Ulring K, Seyfert-Margolis V, Conway M, Francisco D, Molzahn A, Erickson H, Wilson CC, Schunk R, Sierra B, Hughes T, Smolen K, Desjardins M, van Haren S, Mitre X, Cauley J, Li X, Tong A, Evans B, Montesano C, Licona JH, Krauss J, Chang JBP, Izaguirre N, Chaudhary O, Coppi A, Fournier J, Mohanty S, Muenker MC, Nelson A, Raddassi K, Rainone M, Ruff WE, Salahuddin S, Schulz WL, Vijayakumar P, Wang H, Wunder Jr. E, Young HP, Zhao Y, Saksena M, Altman D, Kojic E, Srivastava K, Eaker LQ, Bermúdez-González MC, Beach KF, Sominsky LA, Azad AR, Carreño JM, Singh G, Raskin A, Tcheou J, Bielak D, Kawabata H, Mulder LCF, Kleiner G, Lee AS, Do ED, Fernandes A, Manohar M, Hagan T, Blish CA, Din HN, Roque J, Yang S, Brunton A, Sullivan PE, Strnad M, Lyski ZL, Coulter FJ, Booth JL, Sinko LA, Moldawer LL, Borresen B, Roth-Manning B, Song LZ, Nelson E, Lewis-Smith M, Smith J, Tipan PG, Siles N, Bazzi S, Geltman J, Hurley K, Gabriele G, Sieg S, Vaysman T, Bristow L, Hussaini L, Hellmeister K, Samaha H, Cheng A, Spainhour C, Scherer EM, Johnson B, Bechnak A, Ciric CR, Hewitt L, Carter E, Mcnair N, Panganiban B, Huerta C, Usher J, Ribeiro SP, Altman MC, Becker PM, Rouphael N. Phenotypes of disease severity in a cohort of hospitalized COVID-19 patients: Results from the IMPACC study. EBioMedicine 2022; 83:104208. [PMID: 35952496 PMCID: PMC9359694 DOI: 10.1016/j.ebiom.2022.104208] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/11/2022] [Accepted: 07/25/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Better understanding of the association between characteristics of patients hospitalized with coronavirus disease 2019 (COVID-19) and outcome is needed to further improve upon patient management. METHODS Immunophenotyping Assessment in a COVID-19 Cohort (IMPACC) is a prospective, observational study of 1164 patients from 20 hospitals across the United States. Disease severity was assessed using a 7-point ordinal scale based on degree of respiratory illness. Patients were prospectively surveyed for 1 year after discharge for post-acute sequalae of COVID-19 (PASC) through quarterly surveys. Demographics, comorbidities, radiographic findings, clinical laboratory values, SARS-CoV-2 PCR and serology were captured over a 28-day period. Multivariable logistic regression was performed. FINDINGS The median age was 59 years (interquartile range [IQR] 20); 711 (61%) were men; overall mortality was 14%, and 228 (20%) required invasive mechanical ventilation. Unsupervised clustering of ordinal score over time revealed distinct disease course trajectories. Risk factors associated with prolonged hospitalization or death by day 28 included age ≥ 65 years (odds ratio [OR], 2.01; 95% CI 1.28-3.17), Hispanic ethnicity (OR, 1.71; 95% CI 1.13-2.57), elevated baseline creatinine (OR 2.80; 95% CI 1.63- 4.80) or troponin (OR 1.89; 95% 1.03-3.47), baseline lymphopenia (OR 2.19; 95% CI 1.61-2.97), presence of infiltrate by chest imaging (OR 3.16; 95% CI 1.96-5.10), and high SARS-CoV2 viral load (OR 1.53; 95% CI 1.17-2.00). Fatal cases had the lowest ratio of SARS-CoV-2 antibody to viral load levels compared to other trajectories over time (p=0.001). 589 survivors (51%) completed at least one survey at follow-up with 305 (52%) having at least one symptom consistent with PASC, most commonly dyspnea (56% among symptomatic patients). Female sex was the only associated risk factor for PASC. INTERPRETATION Integration of PCR cycle threshold, and antibody values with demographics, comorbidities, and laboratory/radiographic findings identified risk factors for 28-day outcome severity, though only female sex was associated with PASC. Longitudinal clinical phenotyping offers important insights, and provides a framework for immunophenotyping for acute and long COVID-19. FUNDING NIH.
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Affiliation(s)
- Al Ozonoff
- Clinical & Data Coordinating Center (CDCC); Precision Vaccines Program, Boston Children's Hospital, Boston, MA, United States
| | - Joanna Schaenman
- David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, CA, United States
| | | | - Carly E. Milliren
- Clinical & Data Coordinating Center (CDCC); Precision Vaccines Program, Boston Children's Hospital, Boston, MA, United States
| | - Carolyn S. Calfee
- University of California San Francisco School of Medicine, San Francisco, CA, United States
| | - Charles B. Cairns
- Drexel University/Tower Health Hospital, Philadelphia, PA, United States
| | - Monica Kraft
- University of Arizona, Tucson, AZ, United States
| | - Lindsey R. Baden
- Boston Clinical Site: Precision Vaccines Program, Boston Children's Hospital, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA, United States
| | - Albert C. Shaw
- Yale School of Medicine, and Yale School of Public Health, New Haven, CT, United States
| | - Florian Krammer
- Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Harm van Bakel
- Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Denise A. Esserman
- Yale School of Medicine, and Yale School of Public Health, New Haven, CT, United States
| | - Shanshan Liu
- Clinical & Data Coordinating Center (CDCC); Precision Vaccines Program, Boston Children's Hospital, Boston, MA, United States
| | | | - Viviana Simon
- Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - David A. Hafler
- Yale School of Medicine, and Yale School of Public Health, New Haven, CT, United States
| | - Ruth R. Montgomery
- Yale School of Medicine, and Yale School of Public Health, New Haven, CT, United States
| | - Steven H. Kleinstein
- Yale School of Medicine, and Yale School of Public Health, New Haven, CT, United States
| | - Ofer Levy
- Boston Clinical Site: Precision Vaccines Program, Boston Children's Hospital, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA, United States
| | | | - Elias K. Haddad
- Drexel University/Tower Health Hospital, Philadelphia, PA, United States
| | - David J. Erle
- University of California San Francisco School of Medicine, San Francisco, CA, United States
| | | | | | | | | | | | | | - Jordan P. Metcalf
- Oklahoma University Health Sciences Center, Oklahoma, OK, United States
| | - Mark A. Atkinson
- University of Florida, Gainesville and University of South Florida, Tampa, FL, United States
| | - Scott C. Brakenridge
- University of Florida, Gainesville and University of South Florida, Tampa, FL, United States
| | - David Corry
- Baylor College of Medicine, and the Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey, Houston, TX, United States
| | - Farrah Kheradmand
- Baylor College of Medicine, and the Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey, Houston, TX, United States
| | | | - Esther Melamed
- The University of Texas at Austin, Austin, TX, United States
| | | | - Rafick Sekaly
- Case Western Reserve University, Cleveland, OH, United States
| | - Joann Diray-Arce
- Clinical & Data Coordinating Center (CDCC); Precision Vaccines Program, Boston Children's Hospital, Boston, MA, United States
| | - Bjoern Peters
- La Jolla Institute for Immunology, La Jolla, CA, United States
| | - Alison D. Augustine
- National Institute of Allergy and Infectious Diseases/National Institutes of Health, Bethesda, MD, United States
| | - Elaine F. Reed
- David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, CA, United States
| | | | - Patrice M. Becker
- National Institute of Allergy and Infectious Diseases/National Institutes of Health, Bethesda, MD, United States
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Seijo L, Smith P, Greenland J, Gao Y, Kolaitis N, Venado A, Hays S, Thakur N, Kukreja J, Leard L, Golden J, Shah R, Kleinhenz M, Perez A, Trinh B, Betancourt L, Medikonda N, Calabrese D, Blanc P, Katz P, Singer J. Worsening in the Lung Transplant-Valued Life Activities Scale is Associated with Mortality in Lung Transplant Recipients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Singer J, Diamond J, Anderson M, Benvenuto L, Arcasoy S, Lederer D, Gao Y, Calabrese D, Hays S, Kukreja J, Venado A, Kolaitis N, Leard L, Shah R, Trinh B, Perez A, Golden J, Kleinhenz M, Betancourt L, Oyster M, Brown M, Kalman L, Zeleski D, Adler J, Medikonda N, Tevald M, Balar P, Patel S, Wang P, Greenland J, Christie J, Katz P. Preliminary Development of the Lung Transplant Frailty Index. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Singer J, Diamond J, Anderson M, Benvenuto L, Arcasoy S, Lederer D, Delucchi K, Gao Y, Wang P, Calfee C, Calabrese D, Hays S, Kukreja J, Venado A, Kolaitis N, Leard L, Shah R, Trinh B, Perez A, Kleinhenz M, Golden J, Betancourt L, Oyster M, Brown M, Zeleski D, Adler J, Medikonda N, Tevald M, Kalman L, Balar P, Patel S, Greenland J, Christie J. Molecular Phenotypes of Frailty in Lung Transplant Candidates. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Betancourt L, Rada P, Hernandez L, Araujo H, Ceballos G, Hernandez L, Tucci P, Mari Z, De Pasquale M, Paredes D. Micellar electrokinetic chromatography with laser induced fluorescence detection shows increase of putrescine in erythrocytes of Parkinson's disease patients. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1081-1082:51-57. [DOI: 10.1016/j.jchromb.2018.02.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/26/2017] [Accepted: 02/10/2018] [Indexed: 01/09/2023]
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Kressler J, Jacobs K, Burns P, Betancourt L, Nash MS. Effects of circuit resistance training and timely protein supplementation on exercise-induced fat oxidation in tetraplegic adults. Top Spinal Cord Inj Rehabil 2014; 20:113-22. [PMID: 25477733 DOI: 10.1310/sci2002-113] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Substrate utilization during exercise in persons with spinal cord injury (SCI) remains poorly defined. PURPOSE To investigate effects of circuit resistance training (CRT) and timing of protein supplementation (PS) on fuel utilization in persons with tetraplegia. METHODS Eleven individuals with chronic tetraplegia underwent 6 months of CRT 3 times weekly. Five randomly assigned participants received immediate PS (iPS) administered in split doses prior to and following all exercise sessions. Other participants consumed a matched dose of PS that was delayed until 24 hours post-exercise (dPS). Participants underwent a maximal graded exercise test (GXT) to volitional exhaustion at 4 conditioning time points: 3 months before (-3mo), at the beginning of (0mo), 3 months into (3mo), and 6 months following (6mo) the CRT conditioning program. Respiratory measures were continuously obtained throughout the GXT via open-circuit spirometry. Fuel utilization and energy expenditure were computed from the respiratory data. RESULTS The differences in changes in substrate utilization between the PS groups were not significant as determined by the interaction of PS group and conditioning time point, F (3, 27) = 2.32, P = .098, η(2) P = .205. Maximal absolute fat oxidation did not change significantly from 0 to 6mo (mean difference, 0.014 ± 0.031 g/min; P = .170), and fat oxidation remained low never exceeding an average of 0.10 ± 0.09 g/min for any given exercise intensity. CONCLUSION Maximum fat utilization during exercise and fat utilization at matched exercise intensities were not increased in persons with tetraplegia, independent of PS, and levels of fat oxidation remained low after training.
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Affiliation(s)
- J Kressler
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami , Miami, Florida
| | - K Jacobs
- Department of Kinesiology and Sports Sciences, Miller School of Medicine, University of Miami , Miami, Florida
| | - P Burns
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami , Miami, Florida
| | - L Betancourt
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami , Miami, Florida
| | - M S Nash
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami , Miami, Florida ; Department of Kinesiology and Sports Sciences, Miller School of Medicine, University of Miami , Miami, Florida ; Department of Neurological Surgery, Miller School of Medicine, University of Miami , Miami, Florida ; Department of Rehabilitation Medicine, Miller School of Medicine, University of Miami , Miami, Florida
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Sagredo V, Betancourt L, de Chalbaud LM, Delgado GE. Crystal growth and characterization of the CdGaCrSe(4-X)S(X) system. Cryst Res Technol 2004. [DOI: 10.1002/crat.200410269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Betancourt L, Besada V, González LJ, Morera V, Padrón G, Takao T, Shimonishi Y. Selective isolation and identification of N-terminal blocked peptides from tryptic protein digests. ACTA ACUST UNITED AC 2002; 57:345-53. [PMID: 11350594 DOI: 10.1034/j.1399-3011.2001.00825.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A method for the easy isolation and direct sequencing of N-terminally blocked peptide in proteins refractory to N-terminal sequencing was developed. It is based essentially on tandem enzymatic treatments of the protein with trypsin and carboxypeptidase B, and selective isolation of the Nalpha-blocked peptide using ion-exchange chromatography. The chromatographic step was optimized for picomole amounts of sample and very short elution times by placing a thin layer of the resin over the membrane of an ultrafiltration tube. The isolated fraction can be analyzed directly using MALDI or ESI mass spectrometry. The method was applied to several recombinant and natural N-terminal acetylated proteins. A critical discussion on the intrinsic limitations of the method is also given.
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Affiliation(s)
- L Betancourt
- Center for Genetic Engineering and Biotechnology, Havana, Cuba
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Huerta V, Morera V, Guanche Y, Chinea G, González LJ, Betancourt L, Martínez D, Alvarez C, Lanio ME, Besada V. Primary structure of two cytolysin isoforms from Stichodactyla helianthus differing in their hemolytic activity. Toxicon 2001; 39:1253-6. [PMID: 11306138 DOI: 10.1016/s0041-0101(00)00247-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sticholysin I (St-I) and sticholysin II (St-II) are cytolysins purified from the sea anemone Stichodactyla helianthus with a high degree of sequence identity (93%) but clearly differenced in their hemolytic activity. In order to go further into the structural determinants for the different behavior of St-I and St-II, we report here the complete amino acid sequences and the consensus secondary structure prediction of both proteins. The complete determination of St-II primary structure confirms the partial revision of cytolysin III amino acid sequence. All nonconservative changes between St-I and St-II are located at the N-terminal. According to our prediction these changes could be located at the same face of an alpha-helix during pore formation events and could account for the observed differences in hemolytic activity between St-I and St-II.
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Affiliation(s)
- V Huerta
- Physical-Chemistry Division, Protein Structure Department, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana City, Cuba
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Abstract
Basal forebrain cholinergic neurons (BFCN) are depleted early in the course of Alzheimer's disease (AD). BFCN voltage-gated K(+) channels regulate acetylcholine release and may play a role in BFCN neurodegeneration. Neuronal voltage-gated K(+) channels are heterotetrameric assemblies of K(v) and accessory subunits. Currently, there is no available information about the K(v) proteins expressed in BFCN. Immunohistochemical techniques were used to investigate the expression of specific K(v) subunits in rat brain BFCN. Our results showed that BFCN express both K(v)3.1 and K(v)2.1 subunits. However, the K(v)2.1 subunit showed a wider distribution in noncholinergic neurons than the K(v)3.1 subunit. K(v)3.1 and K(v)2.1 immunostaining was noticeable not only in neuronal cell bodies but also in the dendritic ramifications of these neurons. Insofar as the K(v)3.1 subunit has been classically associated with "fast-spiking neurons" and BFCN have low firing rates and long-duration action potentials, K(v)3.1 subunits may have functions other than facilitating high-frequency firing in BFCN.
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Affiliation(s)
- L Betancourt
- Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
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Fernandez-de-Cossio J, Gonzalez J, Satomi Y, Shima T, Okumura N, Besada V, Betancourt L, Padron G, Shimonishi Y, Takao T. Automated interpretation of low-energy collision-induced dissociation spectra by SeqMS, a software aid for de novo sequencing by tandem mass spectrometry. Electrophoresis 2000; 21:1694-9. [PMID: 10870956 DOI: 10.1002/(sici)1522-2683(20000501)21:9<1694::aid-elps1694>3.0.co;2-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
SeqMS, a software aid for de novo sequencing by tandem mass spectrometry (MS/MS), which was initially developed for the automated interpretation of high-energy collision-induced dissociation (CID) MS/MS spectra of peptides, has been applied to the interpretation of low-energy CID and post-source decay (PSD) spectra of peptides. Based on peptide backbone fragmented ions and their related ions, which are the dominant ions observed in the latter two techniques, the types of ions and their propensities to be observed have been optimized for efficient interpretation of the spectra. In a typical example, the modified SeqMS allowed the complete sequencing of a 31-amino acid synthetic peptide, except for the isobaric amino acids (Leu or Ile, and Lys or Gln), based on only the low-energy CID-MS/MS spectrum.
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Masuda M, Betancourt L, Matsuzawa T, Kashimoto T, Takao T, Shimonishi Y, Horiguchi Y. Activation of rho through a cross-link with polyamines catalyzed by Bordetella dermonecrotizing toxin. EMBO J 2000; 19:521-30. [PMID: 10675321 PMCID: PMC305590 DOI: 10.1093/emboj/19.4.521] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/1999] [Revised: 12/08/1999] [Accepted: 12/08/1999] [Indexed: 11/13/2022] Open
Abstract
The small GTPase Rho, which regulates a variety of cell functions, also serves as a specific substrate for bacterial toxins. Here we demonstrate that Bordetella dermonecrotizing toxin (DNT) catalyzes cross-linking of Rho with ubiquitous polyamines such as putrescine, spermidine and spermine. Mass spectrometric analyses revealed that the cross-link occurred at Gln63, which had been reported to be deamidated by DNT in the absence of polyamines. Rac1 and Cdc42, other members of the Rho family GTPases, were also polyaminated by DNT. The polyamination, like the deamidation, markedly reduced the GTPase activity of Rho without affecting its GTP-binding activity, indicating that polyaminated Rho behaves as a constitutively active analog. Moreover, polyamine-linked Rho, even in the GDP-bound form, associated more effectively with its effector ROCK than deamidated Rho in the GTP-bound form and, when microinjected into cells, induced the anomalous formation of stress fibers indistinguishable from those seen in DNT-treated cells. The results imply that the polyamine-linked Rho, transducing signals to downstream ROCK in a novel GTP-independent manner, plays an important role in DNT cell toxicity.
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Affiliation(s)
- M Masuda
- Project Research for Molecular Bacteriology, Research Institute for Microbial Diseases, Osaka University, Yamada-oka, Japan
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González LJ, Shimizu T, Satomi Y, Betancourt L, Besada V, Padrón G, Orlando R, Shirasawa T, Shimonishi Y, Takao T. Differentiating alpha- and beta-aspartic acids by electrospray ionization and low-energy tandem mass spectrometry. Rapid Commun Mass Spectrom 2000; 14:2092-2102. [PMID: 11114015 DOI: 10.1002/1097-0231(20001130)14:22<2092::aid-rcm137>3.0.co;2-v] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Spectra obtained by low-energy electrospray ionization tandem mass spectrometry (ESI-MS/MS) of 34 peptides containing aspartic acids at position n were studied and unambiguously differentiated. beta-Aspartic acid yields an internal rearrangement similar to that of the C-terminal rearrangements of protonated and cationized peptides. As a result of this rearrangement, two different ions containing the N- and the C-terminal ends of the original peptide are formed, namely, the bn-1 + H2O and y"l - n + 1 - 46 ions, respectively, where e is the number of amino acid residues in the peptide. The structure suggested for the y"l - n + 1 - 46 ion is identical to that proposed for the vn ions observed upon high-energy collision-induced dissociation (CID) experiments. The intensity of these ions in the low-energy MS/MS spectra is greatly influenced by the presence and position of basic amino acids within the sequences. Peptides with a basic amino acid residue at position n - 1 with respect to the beta-aspartic acid yield very intense bn-1 + H2O ions, while the y"l - n + 1 - 46 ion was observed mostly in tryptic peptides. Comparison between the high- and low-energy MS/MS spectra of several isopeptides suggests that a metastable fragmentation process is the main contributor to this rearrangement, whereas for long peptides (40 AA) CID plays a more important role. We also found that alpha-aspartic acid containing peptides yield the normal immonium ion at 88 Da, while peptides containing beta-aspartic acid yield an ion at m/z 70, and a mechanism to explain this phenomenon is proposed. Derivatizing isopeptides to form quaternary amines, and performing MS/MS on the sodium adducts of isopeptides, both improve the relative intensity of the bn + 1 + H2O ions. Based on the above findings, it was possible to determine the isomerization sites of two aged recombinant growth proteins.
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Affiliation(s)
- L J González
- Center for Genetic Engineering and Biotechnology, Havana, Cuba.
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Abstract
To evaluate the problem-solving abilities of a cohort of inner-city cocaine-exposed children and controls, children were invited to play with the Goodman Lock Box, a large red and blue box with 10 compartments, each having a different lock and toy. Examiners, blinded to the children's group status, coded the children's activities during the 6.5-minute play period. Nineteen behaviors were collapsed into three outcomes: Aimless Actions, Competence, and Mental Organization. Groups' scores were compared with scores of the Goodman standardization sample of mixed socioeconomic status preschoolers. Seventy-three cocaine-exposed children and 82 controls were evaluated at age 3.5 years; of these, 58 cocaine-exposed and 63 controls were reevaluated at age 4.5 years. The groups' scores did not differ on any outcome at either time point (p > or = .22). However, both groups' Mental Organization scores were consistently lower than the Goodman group at each age (p < .01). This high-risk cohort may experience problems functioning in more complex environments such as the classroom.
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Affiliation(s)
- L Betancourt
- Division of Neonatology, Albert Einstein Medical Center, Philadelphia, Pennsylvania 19141, USA
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Hernández L, Arrieta J, Betancourt L, Falcón V, Madrazo J, Coego A, Menéndez C. Levansucrase from Acetobacter diazotrophicus SRT4 is secreted via periplasm by a signal-peptide-dependent pathway. Curr Microbiol 1999; 39:146-52. [PMID: 10441728 DOI: 10.1007/s002849900436] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Acetobacter diazotrophicus SRT4 secretes a constitutive levansucrase (LsdA) (EC 2.4.1.10) that is responsible for sucrose utilization. Immunogold electron microscopical studies revealed that LsdA accumulates in the periplasm before secretion. The periplasmic and extracellular forms of the enzyme were purified to homogeneity. Both proteins exhibited similar physical and biochemical characteristics indicating that LsdA adopts its final conformation in the periplasm. The N-terminal sequence of mature LsdA was pGlu-Gly-Asn-Phe-Ser-Arg as determined by PSD-MALDI-TOFMS (post-source decay-matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry). Comparison of this sequence with the predicted precursor protein revealed the cleavage of a 30-residue typical signal peptide followed by the formation of the pyroglutamic acid (pGlu) residue. Thus, in contrast with other Gram-negative bacteria, A. diazotrophicus secretes levansucrase by a signal-peptide-dependent mechanism.
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Affiliation(s)
- L Hernández
- Centre for Genetic Engineering and Biotechnology, Plant Division, P. O. Box 6162, Havana 10600, Cuba
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Betancourt L, Takao T, Hernandez L, Padron G, Shimonishi Y. Structural characterization of Acetobacter diazotropicus levansucrase by matrix-assisted laser desorption/ionization mass spectrometry: identification of an N-terminal blocking group and a free-thiol cysteine residue. J Mass Spectrom 1999; 34:169-174. [PMID: 10214721 DOI: 10.1002/(sici)1096-9888(199903)34:3<169::aid-jms780>3.0.co;2-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
High-resolution matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used to characterize the primary structure of the levansucrase (EC 2.4.1.10) secreted by Acetobacter diazotropicus SRT4. The technique permitted not only the reading frame of this enzyme, the amino acid sequence of which was deduced from DNA, but also the elucidation of an N-terminal blocking group and the position of a disulfide bridge between Cys309 and Cys365 among the three Cys residues. A free cysteine (Cys127) was identified by modifying an intact molecule with a sulfhydryl reagent, 5-(octyldithio)-2-nitrobenzoic acid, under non-reducing conditions. In addition, the enzyme obtained by site-directed mutagenesis at Asp279 to Asn279 was also identified by the above methods. Post-source decay analysis of the tryptic peptide containing the mutation site unequivocally revealed an Asn residue at position 279.
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Affiliation(s)
- L Betancourt
- Institute for Protein Research, Osaka University, Japan
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Fernandez-de-Cossio J, Gonzalez J, Betancourt L, Besada V, Padron G, Shimonishi Y, Takao T. Automated interpretation of high-energy collision-induced dissociation spectra of singly protonated peptides by 'SeqMS', a software aid for de novo sequencing by tandem mass spectrometry. Rapid Commun Mass Spectrom 1998; 12:1867-1878. [PMID: 9842738 DOI: 10.1002/(sici)1097-0231(19981215)12:23<1867::aid-rcm407>3.0.co;2-s] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
SeqMS, a software program designed for the automated interpretation of high-energy collision-induced dissociation (CID) mass spectra of singly protonated peptides ionized by fast atom bombardment, has been developed. The software is capable of probing the sequence of an unknown peptide, and even of certain modified peptides. The program, compiled for WINDOWS95 or NT, also permits the retrieval of raw data and the reconstruction of the spectra on a user-friendly graphical interface with the aid of several tools for processing the spectra, which include setting multiple threshold levels and automatic peak detection. SeqMS is capable of generating candidate sequences, based on the detected peaks, and of displaying the resulting assignments for each candidate in a spectrum or in tabular form. The software has the following capabilities: 1) the ions derived from backbone and side-chain fragmentations, internal and immonium ions, and side-chain loss ions can be used for calculation; 2) 18O-labeling of a peptide at the C terminus, a methodology which was developed to differentiate N-terminal from C-terminal ions, is applicable as an optional setting; 3) modified amino acids and N- or C-terminal blocking groups are taken into account for calculation according to the user's setting in a library; 4) amino acid composition and partial or complete amino acid sequence of a peptide can be used as input for calculation; 5) the assignments of signal output in a spectrum can be graphically edited, and then re-calculated based on the edited peaks. The efficacy of the program is demonstrated by testing 74 high-energy CID spectra, obtained using a four-sector instrument, of synthetic, proteolytic, and biologically active peptides, some of which contain modified groups.
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Hurt H, Malmud E, Betancourt L, Braitman LE, Brodsky NL, Giannetta J. Children with in utero cocaine exposure do not differ from control subjects on intelligence testing. Arch Pediatr Adolesc Med 1997; 151:1237-41. [PMID: 9412600 DOI: 10.1001/archpedi.1997.02170490063011] [Citation(s) in RCA: 64] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To determine if in utero cocaine exposure affects IQ scores in children at age 4 years. DESIGN A prospective, longitudinal evaluation by blinded examiners of the IQ scores of cocaine-exposed and control children of low socioeconomic status who have been observed since birth. SETTING A study center in an inner-city hospital. PARTICIPANTS One hundred one children with in utero cocaine exposure and 118 control children, all of whom were 34 weeks' gestational age or older and nonasphyxiated at birth. MAIN OUTCOME MEASURE Intelligence quotient scores on a standardized intelligence test, the Wechsler preschool and Primary Scale of Intelligence--Revised. RESULTS Seventy-one cocaine-exposed and 78 control children were administered the Wechsler Preschool and Primary Scale of Intelligence--Revised. Maternal, natal, and 30-month characteristics of the children tested did not differ from those not tested. Groups did not differ on mean Performance (83.2 vs 87.0), Verbal (79.0 vs 80.8), or Full Scale (79.0 vs 81.9) IQ scores (all P > or = .10 [values for cocaine-exposed children given first]). None of these 3 scores was associated with cocaine exposure in multivariate linear regressions. Although cocaine-exposed and control groups did not differ in outcome, 93% of cocaine-exposed and 96% of control children had Full Scale IQ scores below 100, the mean IQ score for the test. CONCLUSIONS In an inner-city cohort, IQ scores did not differ between cocaine-exposed and control children. However, both groups performed poorly.
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Affiliation(s)
- H Hurt
- Division of Neonatology, Albert Einstein Medical Center, Philadelphia, PA, USA.
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Hurt H, Malmud E, Betancourt L, Brodsky NL, Giannetta J. A prospective evaluation of early language development in children with in utero cocaine exposure and in control subjects. J Pediatr 1997; 130:310-2. [PMID: 9042138 DOI: 10.1016/s0022-3476(97)70361-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A cohort of children of low socioeconomic status, 76 with in utero cocaine exposure and 81 control subjects, was assessed for early language development at 2 1/2 years of age by a masked examiner using the Preschool Language Scale. There were no differences between groups in expressive, receptive, or total language score (all p > or = 0.57). Physicians caring for cocaine-exposed children with early language delay should not automatically ascribe the delay to cocaine exposure but should initiate a standard evaluation for language delay.
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Affiliation(s)
- H Hurt
- Division of Neonatology, Albert Einstein Medical Center, Philadelphia, Pennsylvania 19141, USA
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Hurt H, Brodsky NL, Betancourt L, Braitman LE, Belsky J, Giannetta J. Play behavior in toddlers with in utero cocaine exposure: a prospective, masked, controlled study. J Dev Behav Pediatr 1996; 17:373-9. [PMID: 8960565 DOI: 10.1097/00004703-199612000-00001] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Play behavior was compared between toddlers with in utero cocaine exposure and controls of similar low socioeconomic status enrolled at birth in a prospective, masked study. At 18 and 24 months, 83 cocaine-exposed and 93 control toddlers were videotaped playing on their own for 15 minutes. An observer who was off-site and unaware of project purpose or drug exposure status of toddlers recorded the most cognitively complex play activity per 15-second interval. In a total of 315 play sessions, the groups did not differ in middle and highest level of play achieved at either 18 or 24 months (p > or = .27). After controlling for confounders, the proportions of play behavior in each of six play categories were similar in the two groups at both 18 and 24 months (p > or = .42). We conclude that in utero cocaine exposure was not associated with differences in play behavior in this cohort of cocaine-exposed and control toddlers.
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Affiliation(s)
- H Hurt
- Division of Neonatology, Albert Einstein Medical Center, Temple University School of Medicine, Philadelphia, PA 19141, USA
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Hurt H, Brodsky NL, Betancourt L, Braitman LE, Malmud E, Giannetta J. Cocaine-exposed children: follow-up through 30 months. J Dev Behav Pediatr 1995; 16:29-35. [PMID: 7730454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This prospective, blinded study evaluates the effect of in utero cocaine exposure on outcome of nonasphyxiated, term and near-term children born to women of low socioeconomic status. Two hundred nineteen children (101 cocaine-exposed and 118 control) with extensive natal evaluations are evaluated at 6-month intervals. We report here growth, performance on the Bayley Scales of Infant Development (BSID) through 30 months of age, and tone and reflexes at 6 and 12 months. To date, subjects have had 816 follow-up visits, with subject retention greater than or equal to 73%. Cocaine-exposed children showed statistically lower mean weights and smaller mean head circumferences than control children over the 30-month follow-up period (p < or = .011). The percentage of children with abnormal tone and reflexes, however, was similar in the two groups at 6 and 12 months (p > or = .34). Mean BSID Mental Development Index (MDI) and Psychomotor Development Index scores did not differ between the two groups (p > or = .16), although both groups' scores decreased over time (p < .001). Of concern, both cocaine-exposed and control groups had lower mean MDI scores than those published for a group of children of higher socioeconomic status. We conclude that, in our cohort of children, low socioeconomic or minority status may have had a substantial influence on BSID scores whereas in utero drug exposure did not.
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Affiliation(s)
- H Hurt
- Division of Neonatology, Albert Einstein Medical Center, Philadelphia, PA 19141, USA
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Escudero J, Navarro J, Padua A, Betancourt L, Nava G. Hemodynamic changes with enalapril in pulmonary arterial hypertension secondary to congenital heart disease. Chest 1987; 91:351-5. [PMID: 3028717 DOI: 10.1378/chest.91.3.351] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Enalapril was used to treat five patients with pulmonary arterial hypertension secondary to congenital cardiopathy, three with ventricular septal defect, one with arterial septal defect, and one with patent ductus arteriosus. The dose of enalapril was 20 mg/day. All patients underwent pretreatment and posttreatment cardiac catheterization. It was concluded that enalapril may be a useful drug in the treatment of pulmonary arterial hypertension secondary to congenital cardiopathy.
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Escudero J, Navarro J, Padua A, Betancourt L, Nava G. [Use of enalapril, an angiotensin-converting enzyme inhibitor, in pulmonary artery hypertension]. Arch Inst Cardiol Mex 1986; 56:467-73. [PMID: 3032121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Enalapril (E) was used to treat 16 patients with pulmonary arterial hypertension, 6 primary and 10 secondary, 5 of the latter with congenital heart disease and 5 with chronic obstructive pulmonary disease. The average dose of E was 20 mg/day. All patients underwent pre and post-treatment cardiac catheterization with determination of pressures at: right atrial (RA), main pulmonary artery (MPA), pulmonary capillary wedge pressure ( VCP) and systemic arterial (SA). Resistances forces were also measured as; total pulmonary (TPR), pulmonary arteriolar (PAR) and total systemic (TSR) as well as cardiac output (CO), and echo and electrocardiograms, chest x ray, stress test and respiratory function test. The functional class (NYHA) improved in all (p less than 0.001). The initial mean pressures were: RA 12.24 +/- 4.35; MPA 73.81 +/- 25.16; VCP 12 +/- 2.73 and SA 89 +/- 14; TPR 1477 +/- 761; PAR 1243 +/- 730 and TSR 1684 +/- 505.5; CO 4.5 +/- 1.29. The final values were: RA 9.66 +/- 2.46 (p less than 0.001); MPA 63.26 +/- 24.45 (p less than 0.001); VCP 11.33 +/- 2.38 (p = NS); SA 81 +/- 10 (p less than 0.001); TPR 1009.5 +/- 536.7 (p less than 0.001); PAR 829 +/- 511.5 (p less than 0.001); TSR 1309.6 +/- 296.3 (p less than 0.001); CO 5.2 +/- 1.44 (p less than 0.001). The average of minutes on treadmill was initially 8.2 +/- 2.45 and final 12.46 +/- 3.0 (p less than 0.001). It is concluded that enalapril is a useful drug in the treatment of pulmonary arterial hypertension of any etiology.
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