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Ebersjö C, Berggren Broström E, Kull I, Lindholm Olinder A. Home Immunization with Palivizumab-A Randomized Pilot Study Describing Safety Aspects and Parents' Preferences. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10020198. [PMID: 36832327 PMCID: PMC9955059 DOI: 10.3390/children10020198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
Among prematurely born infants and newborns with chronic conditions, a respiratory syncytial virus (RSV) infection may cause (re-)admission and later respiratory complications. Therapeutic protection is possible with monthly injections of a specific monoclonal antibody, palivizumab, during RSV season. Standard care is giving up to five injections in clinic-based settings. Immunization at home could be an alternative to standard care for vulnerable infants to reduce the number of revisits and associated risk of RSV infection. The aim of this randomized pilot trial was to evaluate safety aspects and explore parents' preferences of home versus hospital immunization with palivizumab during one RSV season. Immediate adverse events (AEs) were observed and registered by a pediatric specialist nurse. Late-onset AEs were reported by parents. Parents' perceptions were collected through a questionnaire and analyzed using content analysis. The study population consisted of 43 infants in 38 families. No immediate AEs occurred. Three late-onset AEs were reported in two infants in the intervention group. Three categories emerged in the content analysis: (1) protect and watch over the infant, (2) optimal health and well-being for the whole family, and (3) avoid suffering for the infant. The study results show that home immunization with palivizumab is feasible if safety aspects are considered and that parental involvement in the choice of place for immunization after a neonatal intensive care experience can be important.
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Affiliation(s)
- Christina Ebersjö
- Department of Clinical Science and Education, Södersjukhuset, Karolinska Institute, 171 77 Stockholm, Sweden
- Sach’s Children and Youth Hospital, Södersjukhuset AB, 118 83 Stockholm, Sweden
- Correspondence:
| | - Eva Berggren Broström
- Department of Clinical Science and Education, Södersjukhuset, Karolinska Institute, 171 77 Stockholm, Sweden
| | - Inger Kull
- Department of Clinical Science and Education, Södersjukhuset, Karolinska Institute, 171 77 Stockholm, Sweden
- Sach’s Children and Youth Hospital, Södersjukhuset AB, 118 83 Stockholm, Sweden
| | - Anna Lindholm Olinder
- Department of Clinical Science and Education, Södersjukhuset, Karolinska Institute, 171 77 Stockholm, Sweden
- Sach’s Children and Youth Hospital, Södersjukhuset AB, 118 83 Stockholm, Sweden
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Iwata Y, Katada H, Okuda M, Doi Y, Ching TJ, Harada A, Takeiri A, Honda M, Mishima M. Preclinical in vitro evaluation of immune suppression induced by GYM329, Fc-engineered sweeping antibody. J Toxicol Sci 2023; 48:399-409. [PMID: 37394653 DOI: 10.2131/jts.48.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Fc-engineering is commonly used to improve the therapeutic potency of antibody (Ab) treatments. Because FcγRIIb is the only inhibitory FcγR that contains an immunoreceptor tyrosine-based inhibition motif (ITIM), Fc-engineered Abs with enhanced binding affinity to FcγRIIb might provide immune suppression in clinical contexts. GYM329 is an anti-latent myostatin Fc-engineered Ab with increased affinity to FcγRIIb which is expected to improve muscle strength in patients with muscular disorders. Cross-linking of FcγRIIb by immune complex (IC) results in phosphorylation of ITIM to inhibit immune activation and apoptosis in B cells. We examined whether the IC of Fc-engineered Abs with enhanced binding affinity to FcγRIIb causes phosphorylation of ITIM or B cell apoptosis using GYM329 and its Fc variant Abs in human and cynomolgus-monkey (cyno) immune cells in vitro. IC of GYM329 with enhanced binding affinity to human FcγRIIb (×5) induced neither ITIM phosphorylation nor B cell apoptosis. As for GYM329, FcγRIIb should work as an endocytic receptor of small IC to sweep latent myostatin, so it is preferable that GYM329 induces neither ITIM phosphorylation nor B cell apoptosis to prevent immune suppression. In contrast, IC of myo-HuCy2b, the Ab with enhanced binding affinity to human FcγRIIb (×4), induced ITIM phosphorylation and B cell apoptosis. The result of the present study demonstrated that Fc-engineered Abs with similar binding affinity to FcγRIIb had different effects. Thus, it is important to also investigate FcγR-mediated immune functions other than binding to fully understand the biological effects of Fc-engineered Abs.
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Affiliation(s)
- Yoshika Iwata
- Translational Research Division, Chugai Pharmaceutical Co., Ltd
| | | | | | - Yoshiaki Doi
- Research Division, Chugai Pharmaceutical Co., Ltd
| | | | - Asako Harada
- Translational Research Division, Chugai Pharmaceutical Co., Ltd
| | - Akira Takeiri
- Translational Research Division, Chugai Pharmaceutical Co., Ltd
| | - Masaki Honda
- Translational Research Division, Chugai Pharmaceutical Co., Ltd
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Hervé PL, Dhelft V, Zuniga A, Ghasparian A, Rassek O, Yim KC, Donne N, Lambert PH, Benhamou PH, Sampson HA, Mondoulet L. Epicutaneous immunization using synthetic virus-like particles efficiently boosts protective immunity to respiratory syncytial virus. Vaccine 2021; 39:4555-4563. [PMID: 34154864 DOI: 10.1016/j.vaccine.2021.03.081] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 02/02/2023]
Abstract
Despite the substantial health and economic burden caused by RSV-associated illness, no vaccine is available. The sole licensed treatment (palivizumab), composed of a monoclonal neutralizing antibody, blocks the fusion of the virus to the host cell but does not prevent infection. The development of a safe and efficacious RSV vaccine is therefore a priority, but also a considerable challenge, and new innovative strategies are warranted. Most of the adult population encounter regular RSV infections and can elicit a robust neutralizing antibody response, but unfortunately it wanes over time and reinfections during subsequent seasons are common. One approach to protect the mother and young infant from RSV infection is to administer a vaccine capable of boosting preexisting RSV immunity during pregnancy, which would provide protection to the fetus through passive transfer of maternal antibodies, thus preventing primary RSV infection in newborns during their first months of life. Here, we describe the preclinical evaluation of an epicutaneous RSV vaccine booster that combines epicutaneous patches as a delivery platform and a Synthetic Virus-Like Particles (SVLP)-based vaccine displaying multiple RSV F-protein site II (FsII, palivizumab epitope) mimetic as antigen (V-306). We demonstrated in mice that epicutaneous immunization with V-306 efficiently boosts preexisting immunity induced by the homologous V-306 administered subcutaneously. This boosting was characterized by a significant increase in F- and FsII-specific antibodies capable of competing with palivizumab for its target antigen and neutralize RSV. More importantly, epicutaneous booster immunization with V-306 significantly decreased lung viral replication in experimental mice after intranasal RSV challenge, without inducing enhanced RSV disease. In conclusion, an epicutaneous booster vaccine based on V-306 is safe and efficacious in enhancing RSV preexisting immunity in mice. This needle-free vaccine candidate would be potentially suited as a booster vaccine for vulnerable populations such as young infants via pregnant women, and the elderly.
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Affiliation(s)
- Pierre-Louis Hervé
- DBV Technologies, 177-181 Avenue Pierre Brossolette, 92120 Montrouge, France.
| | - Véronique Dhelft
- DBV Technologies, 177-181 Avenue Pierre Brossolette, 92120 Montrouge, France
| | - Armando Zuniga
- Virometix AG, Wagisstrasse 14, CH-8952 Schlieren, Switzerland
| | - Arin Ghasparian
- Virometix AG, Wagisstrasse 14, CH-8952 Schlieren, Switzerland
| | - Oliver Rassek
- Virometix AG, Wagisstrasse 14, CH-8952 Schlieren, Switzerland
| | - Kevin C Yim
- Sigmovir Biosystems, Inc., 9610 Medical Center Drive, Suite #100, Rockville, MD 20850, USA
| | - Nathalie Donne
- DBV Technologies, 177-181 Avenue Pierre Brossolette, 92120 Montrouge, France
| | - Paul-Henri Lambert
- WHO Collaborative Center for Vaccine Immunology, Department of Pathology-Immunology, University of Geneva, Geneva, Switzerland
| | | | - Hugh A Sampson
- DBV Technologies, 12 East 49th Street Tower 49, Suite 4001, New York, NY 10017, USA
| | - Lucie Mondoulet
- DBV Technologies, 177-181 Avenue Pierre Brossolette, 92120 Montrouge, France
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Krilov LR, Anderson EJ. Respiratory syncytial virus hospitalizations in US preterm infants after the 2014 change in immunoprophylaxis guidance by the American Academy of Pediatrics. J Perinatol 2020; 40:1135-1144. [PMID: 32499597 PMCID: PMC7271636 DOI: 10.1038/s41372-020-0689-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 04/03/2020] [Accepted: 05/07/2020] [Indexed: 11/08/2022]
Abstract
Palivizumab is the only licensed and effective immunoprophylaxis (IP) available to prevent respiratory syncytial virus (RSV) infection in high-risk infants including infants born at ≤35 weeks' gestational age (wGA). In 2014, the American Academy of Pediatrics stopped recommending IP for otherwise healthy 29-34 wGA infants, stating that their risk of RSV hospitalization (RSVH) was similar to term infants. Recent studies have demonstrated a significant decline in IP use after 2014 that was accompanied by an increased risk of RSVH in 29-34 wGA infants vs term infants. Severity and healthcare utilization of RSVH were high among 29-34 wGA infants. In 2018, the National Perinatal Association developed guidelines advocating IP use in all ≤32 wGA infants and 32-35 wGA infants with additional risk factors. Risk factor predictive models can identify infants who are at risk for RSVH and promote cost-effective use of palivizumab until new methods of RSV prevention become available.
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Affiliation(s)
- Leonard R Krilov
- Department of Pediatrics, NYU Winthrop Hospital and NYU Long Island School of Medicine, Mineola, NY, USA.
| | - Evan J Anderson
- Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, GA, USA
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Gülsen A, Wedi B, Jappe U. Hypersensitivity reactions to biologics (part I): allergy as an important differential diagnosis in complex immune-derived adverse events*. ALLERGO JOURNAL 2020; 29:32-61. [PMID: 32546899 PMCID: PMC7289641 DOI: 10.1007/s15007-020-2550-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Askin Gülsen
- Division of Clinical and Molecular Allergology, Research Center Borstel, Borstel, Germany
| | - Bettina Wedi
- Klinik u. Poliklinik f. Dermatologie u. Venerologie, OE 6600 - Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - Uta Jappe
- Klinische und Molekulare Allergologie - Forschungszentrum Borstel, Parkallee 35, 23845 Borstel, Germany
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Mori F, Saretta F, Bianchi A, Crisafulli G, Caimmi S, Liotti L, Bottau P, Franceschini F, Paglialunga C, Ricci G, Santoro A, Caffarelli C. Hypersensitivity Reactions to Monoclonal Antibodies in Children. MEDICINA (KAUNAS, LITHUANIA) 2020; 56:E232. [PMID: 32408641 PMCID: PMC7279169 DOI: 10.3390/medicina56050232] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/28/2020] [Accepted: 05/01/2020] [Indexed: 12/12/2022]
Abstract
Biologic drugs are widely used in pediatric medicine. Monoclonal antibodies (mAbs) in particular are a therapeutic option for rheumatic, autoinflammatory and oncologic diseases. Adverse drug reactions and hypersensitivity reactions (HSR) to mAbs may occur in children. Clinical presentation of HSRs to mAbs can be classified according to phenotypes in infusion-related reactions, cytokine release syndrome, both alpha type reactions and type I (IgE/non-IgE), type III, and type IV reactions, all beta-type reactions. The aim of this review is to focus on HSRs associated with the most frequent mAbs in childhood, with particular attention to beta-type reactions. When a reaction to mAbs is suspected a diagnostic work-up including in-vivo and in-vitro testing should be performed. A drug provocation test is recommended only when no alternative drugs are available. In selected patients with immediate IgE-mediated drug allergy a desensitization protocol is indicated. Despite the heavy use of mAbs in childhood, studies evaluating the reliability of diagnostic test are lacking. Although desensitization may be effective in reducing the risk of reactions in children, standardized pediatric protocols are still not available.
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Affiliation(s)
- Francesca Mori
- Allergy Unit, Meyer Children’s Hospital, 50139 Florence, Italy;
| | - Francesca Saretta
- SC Pediatria, Ospedale Latisana-Palmanova, Dipartimento Materno-Infantile Azienda Sanitaria Universitaria Friuli Centrale, 33057 Palmanova (UD), Italy;
| | | | - Giuseppe Crisafulli
- UO Allergologia, Dipartimento di Pediatria, Università di Messina, 98124 Messina, Italy;
| | - Silvia Caimmi
- Clinica Pediatrica Policlinico San Matteo, University di Pavia, 27100 Pavia, Italy;
| | - Lucia Liotti
- Pediatria, Ospedale Principi di Piemonte, 60019 Senigallia, Italy;
| | - Paolo Bottau
- Pediatria e Neonatologia, Ospedale di Imola, 40026 Imola, Italy;
| | - Fabrizio Franceschini
- UOC Pediatria, Azienda Ospedaliero-Universitaria “Ospedali Riuniti”, 60020 Ancona, Italy;
| | - Claudia Paglialunga
- UOC di Pediatria, Azienda Ospedaliera-Universitaria “Consorziale-Policlinico”, Ospedale Pediatrico Giovanni XXIII, 70123 Bari, Italy;
| | - Giampaolo Ricci
- Pediatric Unit, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy;
| | - Angelica Santoro
- Clinica Pediatrica, Dipartimento Medicina e Chirurgia, Università di Parma, 43126 Parma, Italy;
| | - Carlo Caffarelli
- Clinica Pediatrica, Dipartimento Medicina e Chirurgia, Università di Parma, 43126 Parma, Italy;
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Hypersensitivity reactions to biologics (part I): allergy as an important differential diagnosis in complex immune-derived adverse events. ACTA ACUST UNITED AC 2020; 29:97-125. [PMID: 32421085 PMCID: PMC7223134 DOI: 10.1007/s40629-020-00126-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/31/2020] [Indexed: 12/15/2022]
Abstract
Purpose Biotechnological substances (BSs) are strongly relied upon to prevent rejection of transplanted organs, and to treat oncological, allergological, and other inflammatory diseases. Allergic reactions to partly foreign biologics can occur due to their potential immunogenicity. The severity of an immune response to a biological drug may range from no clinical significance to a severe, life-threatening anaphylactic reaction. Methods Detailed searches were performed on Pubmed, Web of Science, and Google Scholar to include all available publications. In addition, the Food and Drug Administration, the European Medicines Agency, and British Columbia Cancer Agency Drug Manual databases were screened for hypersensitivity reaction (HSR), infusion reaction, injection site reaction, urticaria, and anaphylaxis for individual BSs. Results Treatment with BSs can cause various types of HSR. These are mentioned in the literature with definitions such as allergic reactions, anaphylactoid reactions, anaphylaxis, HSR, infusion reactions, injection site reactions, cytokine release syndrome, and urticaria. Due to the overlap in signs and symptoms in the reported descriptions, it is not always possible to differentiate these reactions properly according to their pathomechanism. Similarly, many data reported as anaphylaxis actually describe severe anaphylactic reactions (grades III or IV). Conclusion There is an urgent need for a simpler symptom- or system-based classification and scoring system to create an awareness for HSRs to BSs. A better understanding of the pathophysiology of HSRs and increased clinical experience in the treatment of side effects will provide timely control of unexpected reactions. As a result, immunotherapy with BSs will become safer in the future.
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Karampatsas K, Kong J, Cohen J. Bronchiolitis: an update on management and prophylaxis. Br J Hosp Med (Lond) 2019; 80:278-284. [PMID: 31059347 DOI: 10.12968/hmed.2019.80.5.278] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bronchiolitis is an acute respiratory illness that is the leading cause of hospitalization in young children less than 2 years of age in the UK. Respiratory syncytial virus is the most common virus associated with bronchiolitis and has the highest disease severity, mortality and cost. Bronchiolitis is generally a self-limiting condition, but can have serious consequences in infants who are very young, premature, or have underlying comorbidities. Management of bronchiolitis in the UK is guided by the National Institute for Health and Care Excellence (2015) guidance. The mainstays of management are largely supportive, consisting of fluid management and respiratory support. Pharmacological interventions including nebulized bronchodilators, steroids and antibiotics generally have limited or no evidence of efficacy and are not advised by National Institute of Health and Care Excellence. Antiviral therapeutics remain in development. As treatments are limited, there have been extensive efforts to develop vaccines, mainly targeting respiratory syncytial virus. At present, the only licensed product is a monoclonal antibody for passive immunisation. Its cost restricts its use to those at highest risk. Vaccines for active immunisation of pregnant women and young infants are also being developed.
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Affiliation(s)
- Konstantinos Karampatsas
- Specialist Registrar in Paediatrics, Paediatric and Adolescent Division, University College Hospitals NHS Foundation Trust, London NW1 2BU
| | - Jonathan Kong
- Specialty Trainee in Paediatrics, Paediatric and Adolescent Division, University College Hospitals NHS Foundation Trust, London
| | - Jonathan Cohen
- Consultant in General Paediatrics and Paediatric Infectious Diseases, Paediatric and Adolescent Division, University College Hospitals NHS Foundation Trust, London
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Butt ML, Elliott L, Paes BA. Respiratory syncytial virus hospitalization and incurred morbidities the season after prophylaxis. Paediatr Child Health 2018; 23:441-446. [PMID: 30374219 PMCID: PMC6199632 DOI: 10.1093/pch/pxy046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES The primary objective of this study was to determine the incidence and incurred morbidities of Respiratory syncytial virus (RSV)-related hospitalization (RSVH), the season following completion of prophylaxis. METHODS A retrospective study was conducted of all infants enrolled in a prophylaxis clinic in one institution during the 2009 to 2014 RSV seasons. RSV infection was identified by Diseases codes and confirmed by RSV-positivity. Data were classified into five groups based on indications for prophylaxis. The incidence of RSVH was calculated. For each subgroup, differences in characteristics between children with and without RSVH were analyzed by independent t test or chi-square test. RESULTS During five RSV seasons, 827 infants were enrolled. RSVH incidence the season following prophylaxis was 2.1% (n=17/827). Children with chronic lung disease (CLD) had the highest RSVH incidence (7.7%; n=4/52) followed by preterms 33 to 35 weeks gestation (2.5%; n=4/162), those with complex medical disorders (2.2%; n=3/135), those with congenital heart disease (1.5%; n=1/66) and preterms less than or equal to 32 weeks gestation (1.2%; n=5/412). There was no statistically significant association between indications for prophylaxis and RSVH (Fisher exact test, P=0.060). The odds of RSVH were 4.9 times greater (odds ratio [OR]=4.9; 95% CI: 1.53, 15.55; P=0.007) in CLD compared to those without CLD. The median length of RSVH stay was 4 days; 58.8% (n=10/17) required oxygen (median 1 day); 29.4% (n=5/17) required intensive care. CONCLUSIONS Infants with CLD are at highest risk for RSVH in the season postprophylaxis and may merit palivizumab for more than two seasons dependent on disease severity. However, larger prospective studies are necessary to confirm the findings before embarking on a strategy of providing prophylaxis for a third RSV season.
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Affiliation(s)
- Michelle L Butt
- School of Nursing, McMaster University, Hamilton, Ontario
- Department of Paediatrics, McMaster University, Hamilton, Ontario
| | - LouAnn Elliott
- Paediatrics, McMaster Children’s Hospital, Hamilton, Ontario
| | - Bosco A Paes
- Department of Paediatrics, McMaster University, Hamilton, Ontario
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Lim A, Butt ML, Dix J, Elliott L, Paes B. Respiratory syncytial virus (RSV) infection in children with medical complexity. Eur J Clin Microbiol Infect Dis 2018; 38:171-176. [PMID: 30374685 DOI: 10.1007/s10096-018-3409-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 10/17/2018] [Indexed: 10/28/2022]
Abstract
Children with medical complexity (CMC) are vulnerable to respiratory illness hospitalization (RIH) and respiratory syncytial virus (RSV)-related hospitalization (RSVH) due to multisystem disorders and compromised airways. It is unknown whether RSV prophylaxis is effective, or if RSVH is associated with significant morbidities in CMC. The study objectives were to (1) determine the incidence of RSV-related infection in prophylaxed CMC during the first 3 years of life and (2) assess the burden of illness following RSVH. A single tertiary center, retrospective study, was conducted of CMC who received palivizumab during the 2012-2016 RSV seasons. Fifty-four subjects were enrolled; most received one (38.9%, n = 21) or two (57.4%, n = 31) seasons of prophylaxis (mean = 4.2 [SD = 1.24], palivizumab doses per season). The cohort comprised children with multiple medical conditions (n = 22, 40.8%), tracheostomy (n = 18, 33.3%), and invasive (n = 10, 18.5%) or non-invasive (n = 4, 7.4%) ventilation. Of the CMC, 24 were hospitalized 47 times for a viral-related respiratory illness. RSV incidence in the first 3 years of life was 7.4%. Viral-related RIH and RSVH rates were 44.4% (n = 24/54) and 1.9% (n = 1/54), respectively. Of the four RSV-positive children, one was ventilated for 9 days, two acquired nosocomial RSV that was managed on the ward, and one was discharged home under close complex care supervision. All four RSV-positive cases required additional oxygen during their illness. CMC experience a high viral-related RIH rate and palivizumab likely minimizes RSV-related events and associated morbidities. The efficacy of palivizumab in CMC, especially in those ≤ 3 years, should be prospectively evaluated.
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Affiliation(s)
- A Lim
- Department of Pediatrics, McMaster University, HSC-3A, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - M L Butt
- Department of Pediatrics, McMaster University, HSC-3A, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.,School of Nursing, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - J Dix
- McMaster Children's Hospital, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - L Elliott
- McMaster Children's Hospital, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada
| | - B Paes
- Department of Pediatrics, McMaster University, HSC-3A, 1280 Main Street West, Hamilton, ON, L8S 4K1, Canada.
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González-Parra G, Dobrovolny HM. Modeling of fusion inhibitor treatment of RSV in African green monkeys. J Theor Biol 2018; 456:62-73. [PMID: 30048719 DOI: 10.1016/j.jtbi.2018.07.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 04/18/2018] [Accepted: 07/22/2018] [Indexed: 10/28/2022]
Abstract
Respiratory syncytial virus (RSV) is a respiratory infection that can cause serious illness, particularly in infants. In this study, we test four different model implementations for the effect of a fusion inhibitor, including one model that combines different drug effects, by fitting the models to data from a study of TMC353121 in African green monkeys. We use mathematical modeling to estimate the drug efficacy parameters, εmax, the maximum efficacy of the drug, and EC50, the drug concentration needed to achieve half the maximum effect. We find that if TMC353121 is having multiple effects on viral kinetics, more detailed data, using different treatment delays, is needed to detect this effect.
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Affiliation(s)
- Gilberto González-Parra
- Department of Physics & Astronomy, Texas Christian University, 2800 S University Dr. Fort Worth, TX 76129, USA; Department of Mathematics, New Mexico Tech, Socorro, NM, USA
| | - Hana M Dobrovolny
- Department of Physics & Astronomy, Texas Christian University, 2800 S University Dr. Fort Worth, TX 76129, USA.
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Simões EAF, Bont L, Manzoni P, Fauroux B, Paes B, Figueras-Aloy J, Checchia PA, Carbonell-Estrany X. Past, Present and Future Approaches to the Prevention and Treatment of Respiratory Syncytial Virus Infection in Children. Infect Dis Ther 2018; 7:87-120. [PMID: 29470837 PMCID: PMC5840107 DOI: 10.1007/s40121-018-0188-z] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION The REGAL (RSV Evidence - A Geographical Archive of the Literature) series has provided a comprehensive review of the published evidence in the field of respiratory syncytial virus (RSV) in Western countries over the last 20 years. This seventh and final publication covers the past, present and future approaches to the prevention and treatment of RSV infection among infants and children. METHODS A systematic review was undertaken of publications between January 1, 1995 and December 31, 2017 across PubMed, Embase and The Cochrane Library. Studies reporting data on the effectiveness and tolerability of prophylactic and therapeutic agents for RSV infection were included. Study quality and strength of evidence (SOE) were graded using recognized criteria. A further nonsystematic search of the published literature and Clinicaltrials.gov on antiviral therapies and RSV vaccines currently in development was also undertaken. RESULTS The systematic review identified 1441 studies of which 161 were included. Management of RSV remains centered around prophylaxis with the monoclonal antibody palivizumab, which has proven effective in reducing RSV hospitalization (RSVH) in preterm infants < 36 weeks' gestational age (72% reduction), children with bronchopulmonary dysplasia (65% reduction), and infants with hemodynamically significant congenital heart disease (53% reduction) (high SOE). Palivizumab has also shown to be effective in reducing recurrent wheezing following RSVH (high SOE). Treatment of RSV with ribavirin has conflicting success (moderate SOE). Antibodies with increased potency and extended half-life are currently entering phase 3 trials. There are approximately 15 RSV vaccines in clinical development targeting the infant directly or indirectly via the mother. CONCLUSION Palivizumab remains the only product licensed for RSV prophylaxis, and only available for high-risk infants. For the general population, there are several promising vaccines and monoclonal antibodies in various stages of clinical development, with the aim to significantly reduce the global healthcare impact of this common viral infection. FUNDING AbbVie.
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Affiliation(s)
- Eric A F Simões
- Center for Global Health, Colorado School of Public Health, University of Colorado School of Medicine, Aurora, CO, USA
| | - Louis Bont
- University Medical Center Utrecht, Utrecht, The Netherlands
- ReSViNET (Respiratory Syncytial Virus Network), Utrecht, The Netherlands
| | - Paolo Manzoni
- ReSViNET (Respiratory Syncytial Virus Network), Utrecht, The Netherlands
- Neonatology and NICU, Sant'Anna Hospital, Turin, Italy
| | - Brigitte Fauroux
- Necker University Hospital and Paris 5 University, Paris, France
| | - Bosco Paes
- Department of Paediatrics (Neonatal Division), McMaster University, Hamilton, Canada
| | - Josep Figueras-Aloy
- Hospital Clínic, Catedràtic de Pediatria, Universitat de Barcelona, Barcelona, Spain
| | - Paul A Checchia
- Baylor College of Medicine, Texas Children's Hospital Houston, Houston, TX, USA
| | - Xavier Carbonell-Estrany
- Hospital Clinic, Institut d'Investigacions Biomediques August Pi Suñer (IDIBAPS), Barcelona, Spain.
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Comparing First- and Second-year Palivizumab Prophylaxis in Patients With Hemodynamically Significant Congenital Heart Disease in the CARESS Database (2005-2015). Pediatr Infect Dis J 2017; 36:445-450. [PMID: 28403044 DOI: 10.1097/inf.0000000000001357] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Respiratory syncytial virus hospitalization (RSVH) rates in children <2 years of age with hemodynamically significant congenital heart disease (HSCHD) are 2- to 4-fold higher compared with healthy term infants. Pediatric recommendations differ as to whether palivizumab is beneficial beyond 1 year of age. The objective of this study was to determine whether differences exist in respiratory-related illness hospitalization (RIH) and RSVH in HSCHD infants receiving palivizumab during the first year versus second year of life in the Canadian Registry of Palivizumab. METHODS The Canadian Registry of Palivizumab is a prospective database of infants who received ≥1 dose of palivizumab in 32 hospitals from 2005 to 2015. Demographic data were collected at enrollment and RIH events recorded monthly. Infants <24 months of age with HSCHD were recruited. RESULTS Of 1909 HSCHD infants, 1380 (72.3%) in the first year (mean age, 4.2 months) and 529 (27.7%) in the second year of life (mean age, 17.8 months) received prophylaxis. Baseline demographics for day-care attendance, multiple births, enrollment age and weight differed between the groups (all P < 0.05). Additionally, second year infants had a more complicated neonatal course, with significantly longer length of stay (51.2 vs. 24.9 days) compared with those in the first year. The RIH and RSVH rates in the first year were 11.2% and 2.3% and in the second year were 10.6% and 1.7%. Cox regression analysis showed similar hazard for RIH [hazard ratio, 1.9; 95% confidence interval: 0.7-4.6; P = 0.18] and RSVH [hazard ratio, 2.0; 95% confidence interval: 0.2-16.5; P = 0.52]. CONCLUSIONS Infants in the first and second year of life had a similar RSVH hazard. These findings suggest that infants in the second year with HSCHD, who remain unstable, are equally at risk for RSVH and merit prophylaxis.
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14
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Rey-Jurado E, Kalergis AM. Immunological Features of Respiratory Syncytial Virus-Caused Pneumonia-Implications for Vaccine Design. Int J Mol Sci 2017; 18:E556. [PMID: 28273842 PMCID: PMC5372572 DOI: 10.3390/ijms18030556] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 02/22/2017] [Accepted: 02/26/2017] [Indexed: 01/05/2023] Open
Abstract
The human respiratory syncytial virus (hRSV) is the causative agent for high rates of hospitalizations due to viral bronchiolitis and pneumonia worldwide. Such a disease is characterized by an infection of epithelial cells of the distal airways that leads to inflammation and subsequently to respiratory failure. Upon infection, different pattern recognition receptors recognize the virus and trigger the innate immune response against the hRSV. Further, T cell immunity plays an important role for virus clearance. Based on animal studies, it is thought that the host immune response to hRSV is based on a biased T helper (Th)-2 and Th17 T cell responses with the recruitment of T cells, neutrophils and eosinophils to the lung, causing inflammation and tissue damage. In contrast, human immunity against RSV has been shown to be more complex with no definitive T cell polarization profile. Nowadays, only a humanized monoclonal antibody, known as palivizumab, is available to protect against hRSV infection in high-risk infants. However, such treatment involves several injections at a significantly high cost. For these reasons, intense research has been focused on finding novel vaccines or therapies to prevent hRSV infection in the population. Here, we comprehensively review the recent literature relative to the immunological features during hRSV infection, as well as the new insights into preventing the disease caused by this virus.
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Affiliation(s)
- Emma Rey-Jurado
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8330644, Chile.
| | - Alexis M Kalergis
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8330644, Chile.
- Departamento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago 8330644, Chile.
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15
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Wang DY, Li A, Paes B, Mitchell I, Lanctôt KL. First versus second year respiratory syncytial virus prophylaxis in chronic lung disease (2005-2015). Eur J Pediatr 2017; 176:413-422. [PMID: 28105526 PMCID: PMC5321716 DOI: 10.1007/s00431-017-2849-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 01/02/2017] [Accepted: 01/04/2017] [Indexed: 12/26/2022]
Abstract
Children aged <2 years with chronic lung disease (CLD) have a 10-fold higher risk for respiratory syncytial virus-positive hospitalization (RSVH) compared to healthy term infants. Based on the updated position statements, we compared respiratory-related illness hospitalization (RIH) and RSVH risks in CLD children who received palivizumab during the first year (FY) versus second year (SY) of life in the Canadian Registry of Palivizumab (CARESS). Demographic data were collected at enrolment and RIH events recorded monthly from 2005 to 2015. Eight hundred forty-seven FY and 450 SY children with CLD were identified. SY children had a lower gestational age (27 versus 29 weeks) and required more days of respiratory support (64 versus 43), oxygen therapy (108 versus 55), and length of stay (118 versus 73) during the neonatal course compared to FY children; all p < 0.0005. RIH rates were 12.2 (FY) and 18.2 (SY), and RSVH rates were 2.3 (FY) and 3.9 (SY). Cox regression showed similar hazards for both RIH (hazard ratio 0.9, 95% CI 0.6-1.6, p = 0.812) and RSVH (hazard ratio 1.1, 95% CI 0.4-2.9, p = 0.920). CONCLUSIONS SY and FY children had similar risks for RIH and RSVH. The findings imply that SY children with CLD are correctly selected for palivizumab based on neonatal illness severity and merit prophylaxis. What is Known: • Children with chronic lung disease have a 10-fold higher risk for RSV-positive hospitalization in comparison to healthy term infants and commonly receive palivizumab prophylaxis as a preventative measure against serious RSV-related lower respiratory tract infections. • The American Academy of Pediatrics [ 2 ] and the Canadian Paediatric Society [ 30 ] have recently modified their recommendations for RSV prophylaxis in children with chronic lung disease, limiting palivizumab to either those <32 weeks gestation or those in the first year of life who are oxygen dependent or require medical therapy for the treatment of their condition. What is New: • Children with chronic lung disease receiving an additional course of palivizumab in their second year of life were determined to be at similar risk for both respiratory illness-related hospitalization and RSV-positive hospitalization as palivizumab-naïve children enrolled in the first year of life in the Canadian Registry for palivizumab (CARESS). • CARESS physicians are correctly identifying high-risk children with chronic lung disease in their second year of life, whom they believe will benefit from an additional year of palivizumab prophylaxis, based on neonatal illness severity.
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Affiliation(s)
- Daniel Y. Wang
- Medical Outcomes and Research in Economics (MORE®) Research Group, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room FG-21, Toronto, ON M4N 3M5 Canada
| | - Abby Li
- Medical Outcomes and Research in Economics (MORE®) Research Group, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room FG-21, Toronto, ON M4N 3M5 Canada
| | - Bosco Paes
- Department of Pediatrics, McMaster University, Hamilton, ON Canada
| | - Ian Mitchell
- Department of Pediatrics, University of Calgary, Calgary, AB Canada
| | - Krista L. Lanctôt
- Medical Outcomes and Research in Economics (MORE®) Research Group, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room FG-21, Toronto, ON M4N 3M5 Canada
| | - CARESS Investigators
- Medical Outcomes and Research in Economics (MORE®) Research Group, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Room FG-21, Toronto, ON M4N 3M5 Canada
- Department of Pediatrics, McMaster University, Hamilton, ON Canada
- Department of Pediatrics, University of Calgary, Calgary, AB Canada
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Outcomes of Infants Receiving Palivizumab Prophylaxis for Respiratory Syncytial Virus in Canada and Italy: An International, Prospective Cohort Study. Pediatr Infect Dis J 2017; 36:2-8. [PMID: 27649365 DOI: 10.1097/inf.0000000000001340] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Respiratory syncytial virus (RSV) infection frequently results in RSV-related hospitalization (RSVH) in young infants. We examined the outcomes of palivizumab recipients within the Canadian Registry (CARESS) and the Torino-Verona Italian Registry over the 2002-2014 RSV seasons. METHODS RSVHs were captured during the study seasons. Premature infants who received palivizumab (≤35 completed weeks' gestational age; group1) were compared with infants given palivizumab for underlying disorders regardless of gestational age (group 2). Variables and between-group incidences were analyzed. Risk factors associated with RSVH were assessed by logistic regression. RESULTS A total of 14,468 palivizumab-exposed infants were enrolled (group 1, n = 9093; group 2, n = 4856; miscellaneous, n = 519). RSVH was significantly more frequent in group 2 (211/4856, 4.34%) versus group 1 infants (216/9093, 2.37% [relative risk 1.93; 95% confidence interval (CI): 1.60-2.33; P < 0.0001]). Infants with neuromuscular disorders (7.88%), airway anomalies (5.95%), bronchopulmonary dysplasia (4.75%) and hemodynamically significant congenital heart disease (4.10%) had the highest RSVH incidences. After multivariable logistic regression, only neuromuscular disease [odds ratio [OR] 4.29; 95% CI: 2.30-8.00; P < 0.01], airway anomalies (OR 3.23; 95% CI: 1.92-5.43; P < 0.01), Down syndrome (OR 2.25; 95% CI: 1.31-3.89; P < 0.01), hemodynamically significant congenital heart disease (OR 2.24; 95% CI: 1.52-3.31; P < 0.001), prematurity ≤28 completed weeks' gestational age (OR 1.82; 95% CI: 1.29-2.58; P < 0.001) and bronchopulmonary dysplasia (OR 1.81; 95% CI: 1.31-2.50; P < 0.001) significantly predicted RSVH. No significant association was detected with the number of doses administered or the time elapsed after the previous dose. CONCLUSIONS RSVH rates are higher in infants given palivizumab for reasons other than prematurity. It is uncertain whether these findings relate to inadequate current palivizumab dosing protocols or to a specific increased RSVH risk inherent in infants with severe underlying comorbidities.
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