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Maurya P, Ture SK, Li C, Scheible KM, McGrath KE, Palis J, Morrell CN. Transfusion of Adult, but Not Neonatal, Platelets Promotes Monocyte Trafficking in Neonatal Mice. Arterioscler Thromb Vasc Biol 2023; 43:873-885. [PMID: 36951062 DOI: 10.1161/atvbaha.122.318162] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 03/06/2023] [Indexed: 03/24/2023]
Abstract
BACKGROUND Thrombocytopenia is common in preterm neonates. Platelet transfusions are sometimes given to thrombocytopenic neonates with the hope of reducing the bleeding risk, however, there are little clinical data to support this practice, and platelet transfusions may increase the bleeding risk or lead to adverse complications. Our group previously reported that fetal platelets expressed lower levels of immune-related mRNA compared with adult platelets. In this study, we focused on the effects of adult versus neonatal platelets on monocyte immune functions that may have an impact on neonatal immune function and transfusion complications. METHODS Using RNA sequencing of postnatal day 7 and adult platelets, we determined age-dependent platelet gene expression. Platelets and naive bone marrow-isolated monocytes were cocultured and monocyte phenotypes determined by RNA sequencing and flow cytometry. An in vivo model of platelet transfusion in neonatal thrombocytopenic mice was used in which platelet-deficient TPOR (thrombopoietin receptor) mutant mice were transfused with adult or postnatal day 7 platelets and monocyte phenotypes and trafficking were determined. RESULTS Adult and neonatal platelets had differential immune molecule expression, including Selp. Monocytes incubated with adult or neonatal mouse platelets had similar inflammatory (Ly6Chi) but different trafficking phenotypes, as defined by CCR2 and CCR5 mRNA and surface expression. Blocking P-sel (P-selectin) interactions with its PSGL-1 (P-sel glycoprotein ligand-1) receptor on monocytes limited the adult platelet-induced monocyte trafficking phenotype, as well as adult platelet-induced monocyte migration in vitro. Similar results were seen in vivo, when thrombocytopenic neonatal mice were transfused with adult or postnatal day 7 platelets; adult platelets increased monocyte CCR2 and CCR5, as well as monocyte chemokine migration, whereas postnatal day 7 platelets did not. CONCLUSIONS These data provide comparative insights into adult and neonatal platelet transfusion-regulated monocyte functions. The transfusion of adult platelets to neonatal mice was associated with an acute inflammatory and trafficking monocyte phenotype that was platelet P-sel dependent and may have an impact on complications associated with neonatal platelet transfusions.
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Affiliation(s)
- Preeti Maurya
- Aab Cardiovascular Research Institute (P.M., S.K.T., C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Pediatrics (P.M., K.M.S., K.E.M., J.P.), University of Rochester School of Medicine and Dentistry, NY
| | - Sara K Ture
- Aab Cardiovascular Research Institute (P.M., S.K.T., C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Chen Li
- Aab Cardiovascular Research Institute (P.M., S.K.T., C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Kristin M Scheible
- Department of Pediatrics (P.M., K.M.S., K.E.M., J.P.), University of Rochester School of Medicine and Dentistry, NY
| | - Kathleen E McGrath
- Department of Pediatrics (P.M., K.M.S., K.E.M., J.P.), University of Rochester School of Medicine and Dentistry, NY
| | - James Palis
- Department of Pediatrics (P.M., K.M.S., K.E.M., J.P.), University of Rochester School of Medicine and Dentistry, NY
- Department of Pathology and Laboratory Medicine (J.P., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
| | - Craig N Morrell
- Aab Cardiovascular Research Institute (P.M., S.K.T., C.L., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Medicine (C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Microbiology and Immunology (C.N.M.), University of Rochester School of Medicine and Dentistry, NY
- Department of Pathology and Laboratory Medicine (J.P., C.N.M.), University of Rochester School of Medicine and Dentistry, NY
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Kulkarni-Munje A, Malshe N, Palkar S, Amlekar A, Lalwani S, Mishra AC, Arankalle V. Immune Response of Indian Preterm Infants to Pentavalent Vaccine Varies With Component Antigens and Gestational Age. Front Immunol 2021; 12:592731. [PMID: 33968011 PMCID: PMC8102823 DOI: 10.3389/fimmu.2021.592731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 03/31/2021] [Indexed: 11/28/2022] Open
Abstract
Childhood vaccination plays critical role in protecting infants from several dreaded diseases. Of the global 15 million preterm (PT) infants with compromised immune system born annually, India contributes to >3.5 million. Generation of adequate vaccine-induced immune response needs to be ensured of their protection. Immune response of Indian PT (n = 113) and full-term (FT, n = 80) infants to pentavalent vaccine administered as per the national recommendation was studied. Antibody titers against component antigens of pentavalent vaccine, immune cells profiling (T and B cells, monocytes and dendritic cells) and plasma cytokines were determined pre- and post-vaccination. Additionally, cell-mediated recall immune responses to pentavalent antigens were evaluated after short time antigenic exposure to infant PBMCs. Irrespective of gestational age (GA), all the infants developed adequate antibody response against tetanus, diphtheria, and protective but lower antibody levels for Haemophilus influenzae type-b and hepatitis B in preterm infants. Lower (~74%) protective antibody response to pertussis was independent of gestational age. PT-infants exhibited lower frequencies of CD4 T cells/dendritic cells/monocytes, increased plasma IL-10 levels and lower proliferation of central and effector memory T cells than in term-infants. Proliferative central memory response of FT-infants without anti-pertussis antibodies suggests protection from subsequent infection. Responder/non-responder PT-infants lacked immunological memory and could be infected with Bordetella. For hepatitis B, the recall response was gestational age-dependent and antibody status-independent. Humoral/cellular immune responses of PT-infants were dependent on the type of the immunogen. Preterm infants born before 32 weeks of gestation may need an extra dose of pentavalent vaccine for long lived robust immune response.
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Affiliation(s)
- Archana Kulkarni-Munje
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University) University, Pune, India
| | - Nandini Malshe
- Department of Paediatrics, Bharati Vidyapeeth (Deemed To Be University) University Medical College, Pune, India
| | - Sonali Palkar
- Department of Paediatrics, Bharati Vidyapeeth (Deemed To Be University) University Medical College, Pune, India
| | - Aniket Amlekar
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University) University, Pune, India
| | - Sanjay Lalwani
- Department of Paediatrics, Bharati Vidyapeeth (Deemed To Be University) University Medical College, Pune, India
| | - Akhilesh Chandra Mishra
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University) University, Pune, India
| | - Vidya Arankalle
- Department of Communicable Diseases, Interactive Research School for Health Affairs, Bharati Vidyapeeth (Deemed To Be University) University, Pune, India
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Topham DJ, DeDiego ML, Nogales A, Sangster MY, Sant A. Immunity to Influenza Infection in Humans. Cold Spring Harb Perspect Med 2021; 11:a038729. [PMID: 31871226 PMCID: PMC7919402 DOI: 10.1101/cshperspect.a038729] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review discusses the human immune responses to influenza infection with some insights from studies using animal models, such as experimental infection of mice. Recent technological advances in the study of human immune responses have greatly added to our knowledge of the infection and immune responses, and therefore much of the focus is on recent studies that have moved the field forward. We consider the complexity of the adaptive response generated by many sequential encounters through infection and vaccination.
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Affiliation(s)
- David J Topham
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York 14642, USA
| | - Marta L DeDiego
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, 28049 Madrid, Spain
| | - Aitor Nogales
- Instituto Nacional de Investigación y Tecnologia Agraria y Ailmentaria, 28040 Madrid, Spain
| | - Mark Y Sangster
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York 14642, USA
| | - Andrea Sant
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York 14642, USA
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Abstract
Purpose of Review Detail normal adaptive immune maturation during fetal and neonatal life and review the clinical implications of arrested immune development. Recent Findings Advancements in the field of immunology have enabled investigations of the adaptive immunity starting during fetal life. New insights have drawn important distinctions between the neonatal and adult immune systems. The presence of diverse immunologic responses in the perinatal period suggests the importance of in utero immune development. Disruption of immune maturation due to premature birth may have significant implications for clinical pathology. Summary Establishing protective adaptive immunity during the perinatal period is critical for effective immune responses later in life. Preterm infants are susceptible to aberrant immune system maturation and inflammatory immune responses have been associated with the development of necrotizing enterocolitis (NEC) and bronchopulmonary dysplasia (BPD). Improving our understanding of how immune responses contribute to the pathogenesis of NEC and BPD may offer new opportunities for future treatment and prevention of these diseases.
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Wang SH, Tsao PN. Phenotypes of Bronchopulmonary Dysplasia. Int J Mol Sci 2020; 21:ijms21176112. [PMID: 32854293 PMCID: PMC7503264 DOI: 10.3390/ijms21176112] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 12/18/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD) is the most common chronic morbidity in preterm infants. In the absence of effective interventions, BPD is currently a major therapeutic challenge. Several risk factors are known for this multifactorial disease that results in disrupted lung development. Inflammation plays an important role and leads to persistent airway and pulmonary vascular disease. Since corticosteroids are potent anti-inflammatory agents, postnatal corticosteroids have been used widely for BPD prevention and treatment. However, the clinical responses vary to a great degree across individuals, and steroid-related complications remain major concerns. Emerging studies on the molecular mechanism of lung alveolarization during inflammatory stress will elucidate the complicated pathway and help discover novel therapeutic targets. Moreover, with the advances in metabolomics, there are new opportunities to identify biomarkers for early diagnosis and prognosis prediction of BPD. Pharmacometabolomics is another novel field aiming to identify the metabolomic changes before and after a specific drug treatment. Through this "metabolic signature," a more precise treatment may be developed, thereby avoiding unnecessary drug exposure in non-responders. In the future, more clinical, genetic, and translational studies would be required to improve the classification of BPD phenotypes and achieve individualized care to enhance the respiratory outcomes in preterm infants.
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Affiliation(s)
- Shih-Hsin Wang
- Department of Pediatrics, Far Eastern Memorial Hospital, New Taipei City 22060, Taiwan;
| | - Po-Nien Tsao
- Department of Pediatrics, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei 100225, Taiwan
- Center for Developmental Biology & Regenerative Medicine, National Taiwan University, Taipei 100226, Taiwan
- Correspondence: ; Tel.: +886-2-23123456 (ext. 71013)
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McDavid A, Corbett AM, Dutra JL, Straw AG, Topham DJ, Pryhuber GS, Caserta MT, Gill SR, Scheible KM, Holden-Wiltse J. Eight practices for data management to enable team data science. J Clin Transl Sci 2020; 5:e14. [PMID: 33948240 PMCID: PMC8057476 DOI: 10.1017/cts.2020.501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION In clinical and translational research, data science is often and fortuitously integrated with data collection. This contrasts to the typical position of data scientists in other settings, where they are isolated from data collectors. Because of this, effective use of data science techniques to resolve translational questions requires innovation in the organization and management of these data. METHODS We propose an operational framework that respects this important difference in how research teams are organized. To maximize the accuracy and speed of the clinical and translational data science enterprise under this framework, we define a set of eight best practices for data management. RESULTS In our own work at the University of Rochester, we have strived to utilize these practices in a customized version of the open source LabKey platform for integrated data management and collaboration. We have applied this platform to cohorts that longitudinally track multidomain data from over 3000 subjects. CONCLUSIONS We argue that this has made analytical datasets more readily available and lowered the bar to interdisciplinary collaboration, enabling a team-based data science that is unique to the clinical and translational setting.
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Affiliation(s)
- Andrew McDavid
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, USA
| | - Anthony M. Corbett
- Clinical and Translational Science Institute, University of Rochester, Rochester, NY, USA
| | - Jennifer L. Dutra
- Clinical and Translational Science Institute, University of Rochester, Rochester, NY, USA
| | - Andrew G. Straw
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, USA
| | - David J. Topham
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, USA
| | | | - Mary T. Caserta
- Department of Pediatrics, University of Rochester, Rochester, NY, USA
| | - Steven R. Gill
- Department of Microbiology and Immunology, University of Rochester, Rochester, NY, USA
| | | | - Jeanne Holden-Wiltse
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, USA
- Clinical and Translational Science Institute, University of Rochester, Rochester, NY, USA
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Sproat T, Payne RP, Embleton ND, Berrington J, Hambleton S. T Cells in Preterm Infants and the Influence of Milk Diet. Front Immunol 2020; 11:1035. [PMID: 32582165 PMCID: PMC7280433 DOI: 10.3389/fimmu.2020.01035] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 04/29/2020] [Indexed: 12/22/2022] Open
Abstract
Preterm infants born before 32 weeks gestational age (GA) have high rates of late onset sepsis (LOS) and necrotizing enterocolitis (NEC) despite recent improvements in infection control and nutrition. Breast milk has a clear protective effect against both these outcomes likely due to multiple mechanisms which are not fully understood but may involve effects on both the infant's immune system and the developing gut microbiota. Congregating at the interface between the mucosal barrier and the microbiota, innate and adaptive T lymphocytes (T cells) participate in this interaction but few studies have explored their development after preterm delivery. We conducted a literature review of T cell development that focuses on fetal development, postnatal maturation and the influence of milk diet. The majority of circulating T cells in the preterm infant display a naïve phenotype but are still able to initiate functional responses similar to those seen in term infants. T cells from preterm infants display a skew toward a T-helper 2(Th2) phenotype and have an increased population of regulatory cells (Tregs). There are significant gaps in knowledge in this area, particularly in regards to innate-like T cells, but work is emerging: transcriptomics and mass cytometry are currently being used to map out T cell development, whilst microbiomic approaches may help improve understanding of events at mucosal surfaces. A rapid rise in organoid models will allow robust exploration of host-microbe interactions and may support the development of interventions that modulate T-cell responses for improved infant health.
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Affiliation(s)
- Thomas Sproat
- Neonatal Intensive Care Unit, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
- Immunity and Inflammation Theme, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Rebecca Pamela Payne
- Immunity and Inflammation Theme, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Nicholas D. Embleton
- Neonatal Intensive Care Unit, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
- Population Health Science Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Janet Berrington
- Neonatal Intensive Care Unit, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
- Immunity and Inflammation Theme, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Sophie Hambleton
- Immunity and Inflammation Theme, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
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8
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Brewer CL, Baccei ML. The development of pain circuits and unique effects of neonatal injury. J Neural Transm (Vienna) 2020; 127:467-479. [PMID: 31399790 PMCID: PMC7007840 DOI: 10.1007/s00702-019-02059-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/03/2019] [Indexed: 12/15/2022]
Abstract
Pain is a necessary sensation that prevents further tissue damage, but can be debilitating and detrimental in daily life under chronic conditions. Neuronal activity strongly regulates the maturation of the somatosensory system, and aberrant sensory input caused by injury or inflammation during critical periods of early postnatal development can have prolonged, detrimental effects on pain processing. This review will outline the maturation of neuronal circuits responsible for the transmission of nociceptive signals and the generation of pain sensation-involving peripheral sensory neurons, the spinal cord dorsal horn, and brain-in addition to the influences of the neuroimmune system on somatosensation. This summary will also highlight the unique effects of neonatal tissue injury on the maturation of these systems and subsequent consequences for adult somatosensation. Ultimately, this review emphasizes the need to account for age as an independent variable in basic and clinical pain research, and importantly, to consider the distinct qualities of the pediatric population when designing novel strategies for pain management.
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Affiliation(s)
- Chelsie L Brewer
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA
- Department of Anesthesiology, Pain Research Center, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA
| | - Mark L Baccei
- Neuroscience Graduate Program, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA.
- Department of Anesthesiology, Pain Research Center, University of Cincinnati Medical Center, 231 Albert Sabin Way, Cincinnati, OH, 45267, USA.
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9
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Qazi KR, Bach Jensen G, van der Heiden M, Björkander S, Holmlund U, Haileselassie Y, Kokkinou E, Marchini G, Jenmalm MC, Abrahamsson T, Sverremark-Ekström E. Extremely Preterm Infants Have Significant Alterations in Their Conventional T Cell Compartment during the First Weeks of Life. THE JOURNAL OF IMMUNOLOGY 2019; 204:68-77. [PMID: 31801814 DOI: 10.4049/jimmunol.1900941] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/27/2019] [Indexed: 12/26/2022]
Abstract
Extremely preterm neonates are particularly susceptible to infections, likely because of severely impaired immune function. However, little is known on the composition of the T cell compartment in early life in this vulnerable population. We conducted a comprehensive phenotypic flow cytometry-based longitudinal analysis of the peripheral conventional T cell compartment of human extremely low gestational age neonates (ELGAN) with extremely low birth weight (ELBW; <1000 g) participating in a randomized placebo-controlled study of probiotic supplementation. PBMCs from ELGAN/ELBW neonates were collected at day 14, day 28, and postmenstrual week 36. Comparisons were made with full-term 14-d-old neonates. Total CD4+ and CD8+ T cell frequencies were markedly lower in the preterm neonates. The reduction was more pronounced among the CD8+ population, resulting in an increased CD4/CD8 ratio. The preterm infants were also more Th2 skewed than the full-term infants. Although the frequency of regulatory T cells seemed normal in the ELGAN/ELBW preterm neonates, their expression of the homing receptors α4β7, CCR4, and CCR9 was altered. Notably, ELGAN/ELBW infants developing necrotizing enterocolitis before day 14 had higher expression of CCR9 in CD4+T cells at day 14. Chorioamnionitis clearly associated with reduced T regulatory cell frequencies and functional characteristics within the preterm group. Finally, probiotic supplementation with Lactobacillus reuteri did not impose any phenotypic changes of the conventional T cell compartment. In conclusion, notable immaturities of the T cell compartment in ELGAN/ELBW neonates may at least partially explain their increased susceptibility to severe immune-mediated morbidities.
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Affiliation(s)
- Khaleda Rahman Qazi
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden;
| | - Georg Bach Jensen
- Department of Clinical and Experimental Medicine, Linköping University, 581 83 Linköping, Sweden.,Department of Paediatrics, Linköping University, 581 83 Linköping, Sweden; and
| | - Marieke van der Heiden
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Sophia Björkander
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Ulrika Holmlund
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Yeneneh Haileselassie
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Efthymia Kokkinou
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Giovanna Marchini
- Department of Women's and Children's Health, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Maria C Jenmalm
- Department of Clinical and Experimental Medicine, Linköping University, 581 83 Linköping, Sweden
| | - Thomas Abrahamsson
- Department of Clinical and Experimental Medicine, Linköping University, 581 83 Linköping, Sweden.,Department of Paediatrics, Linköping University, 581 83 Linköping, Sweden; and
| | - Eva Sverremark-Ekström
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
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Fike AJ, Kumova OK, Carey AJ. Dissecting the defects in the neonatal CD8 + T-cell response. J Leukoc Biol 2019; 106:1051-1061. [PMID: 31260598 DOI: 10.1002/jlb.5ru0319-105r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/24/2019] [Accepted: 06/10/2019] [Indexed: 12/26/2022] Open
Abstract
The neonatal period presents a complex scenario where the threshold of reactivity toward colonizing microbiota, maternal antigens, autoantigens, and pathogens must be carefully moderated and balanced. CD8+ T cells are critical for the response against intracellular bacteria and viruses, but this immune compartment maintains altered function relative to adult counterparts because of the unique challenges which infants face. Here, we review our current understanding of the factors which may promote the attenuation and altered function of the neonatal CD8+ T-cell response and potential avenues for future study. Specifically, we have focused on the neonatal CD8+ T-cell ontogeny, memory formation, TCR structure and repertoire, TCR inhibitory receptors, and the clinical implications of altered neonatal CD8+ T-cell function. Special emphasis has been placed on examining the response of preterm neonates relative to term neonates and adults.
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Affiliation(s)
- Adam J Fike
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Ogan K Kumova
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
| | - Alison J Carey
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
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11
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Lou J, Hu Y, Wu MD, Che LQ, Wu YF, Zhao Y, Tian BP, Bao ZQ, Zhu C, Wu YP, He LL, Bai CX, Zhou J, Ying SM, Li W, Chen ZH, Chen DX, Dorling A, Shen HH. Endothelial cell-specific anticoagulation reduces inflammation in a mouse model of acute lung injury. Acta Pharmacol Sin 2019; 40:769-780. [PMID: 30446733 DOI: 10.1038/s41401-018-0175-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 09/24/2018] [Indexed: 01/11/2023] Open
Abstract
Tissue factor (TF)-dependent coagulation contributes to lung inflammation and the pathogenesis of acute lung injury (ALI). In this study, we explored the roles of targeted endothelial anticoagulation in ALI using two strains of transgenic mice expressing either a membrane-tethered human tissue factor pathway inhibitor (hTFPI) or hirudin fusion protein on CD31+ cells, including vascular endothelial cells (ECs). ALI was induced by intratracheal injection of LPS, and after 24 h the expression of TF and protease-activated receptors (PARs) on EC in lungs were assessed, alongside the extent of inflammation and injury. The expression of TF and PARs on the EC in lungs was upregulated after ALI. In the two strains of transgenic mice, expression of either of hTFPI or hirudin by EC was associated with significant reduction of inflammation, as assessed by the extent of leukocyte infiltration or the levels of proinflammatory cytokines, and promoted survival after LPS-induced ALI. The beneficial outcomes were associated with inhibition of the expression of chemokine CCL2 in lung tissues. The protection observed in the CD31-TFPI-transgenic strain was abolished by injection of an anti-hTFPI antibody, but not by prior engraftment of the transgenic strains with WT bone marrow, confirming that the changes observed were a specific transgenic expression of anticoagulants by EC. These results demonstrate that the inflammation in ALI is TF and thrombin dependent, and that expression of anticoagulants by EC significantly inhibits the development of ALI via repression of leukocyte infiltration, most likely via inhibition of chemokine gradients. These data enhance our understanding of the pathology of ALI and suggest a novel therapeutic strategy for treatment.
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Abstract
Bronchopulmonary dysplasia (BPD) continues to be one of the most common complications of preterm birth and is characterized histopathologically by impaired lung alveolarization. Extremely preterm born infants remain at high risk for the development of BPD, highlighting a pressing need for continued efforts to understand the pathomechanisms at play in affected infants. This brief review summarizes recent progress in our understanding of the how the development of the newborn lung is stunted, highlighting recent reports on roles for growth factor signaling, oxidative stress, inflammation, the extracellular matrix and proteolysis, non-coding RNA, and fibroblast and epithelial cell plasticity. Additionally, some concerns about modeling BPD in experimental animals are reviewed, as are new developments in the in vitro modeling of pathophysiological processes relevant to impaired lung alveolarization in BPD.
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Affiliation(s)
- Rory E Morty
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Giessen, Germany.
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13
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Newman DK, Fu G, McOlash L, Schauder D, Newman PJ, Cui W, Rao S, Johnson BD, Gershan JA, Riese MJ. Frontline Science: PECAM-1 (CD31) expression in naïve and memory, but not acutely activated, CD8 + T cells. J Leukoc Biol 2018; 104:883-893. [PMID: 30063264 PMCID: PMC6195461 DOI: 10.1002/jlb.2hi0617-229rrr] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 06/20/2017] [Accepted: 07/01/2018] [Indexed: 01/16/2023] Open
Abstract
Inhibitory cell surface proteins on T cells are often dynamically regulated, which contributes to their physiologic function. PECAM-1 (CD31) is an inhibitory receptor that facilitates TGF-β-mediated suppression of T cell activity. It is well established in CD4+ T cells that PECAM-1 is expressed in naïve recent thymic emigrants, but is down-regulated after acute T cell activation and absent from memory cells. The extent to which PECAM-1 expression is similarly regulated in CD8+ T cells is much less well characterized. We evaluated T cells recovered from mice after infection with a model intracellular pathogen and determined that, in CD8+ T cells, PECAM-1 expression was strongly down-regulated during acute infection but re-expressed to intermediate levels in memory cells. Down-regulation of PECAM-1 expression in CD8+ T cells was transcriptionally regulated and affected by the strength and nature of TCR signaling. PECAM-1 was also detected on the surface of human activated/memory CD8+ , but not CD4+ T cells. These data demonstrate that PECAM-1 expression is dynamically regulated, albeit differently, in both CD4+ and CD8+ T cells. Furthermore, unlike memory CD4+ T cells, memory CD8+ T cells retain PECAM-1 expression and have the potential to be modulated by this inhibitory receptor.
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Affiliation(s)
- Debra K. Newman
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Guoping Fu
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Laura McOlash
- Division of Hematology/Oncology/Transplant, Department of Pediatrics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - David Schauder
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Peter J. Newman
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Weiguo Cui
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Sridhar Rao
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Bryon D. Johnson
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Division of Hematology/Oncology/Transplant, Department of Pediatrics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Jill A. Gershan
- Division of Hematology/Oncology/Transplant, Department of Pediatrics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
| | - Matthew J. Riese
- Blood Research Institute, Blood Center of Wisconsin, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Department of Microbiology and Molecular Genetics, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
- Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, 8733 Watertown Plank Road, Milwaukee, WI, 53226
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14
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Schüller SS, Kramer BW, Villamor E, Spittler A, Berger A, Levy O. Immunomodulation to Prevent or Treat Neonatal Sepsis: Past, Present, and Future. Front Pediatr 2018; 6:199. [PMID: 30073156 PMCID: PMC6060673 DOI: 10.3389/fped.2018.00199] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 06/25/2018] [Indexed: 12/12/2022] Open
Abstract
Despite continued advances in neonatal medicine, sepsis remains a leading cause of death worldwide in neonatal intensive care units. The clinical presentation of sepsis in neonates varies markedly from that in older children and adults, and distinct acute inflammatory responses results in age-specific inflammatory and protective immune response to infection. This review first provides an overview of the neonatal immune system, then covers current mainstream, and experimental preventive and adjuvant therapies in neonatal sepsis. We also discuss how the distinct physiology of the perinatal period shapes early life immune responses and review strategies to reduce neonatal sepsis-related morbidity and mortality. A summary of studies that characterize immune ontogeny and neonatal sepsis is presented, followed by discussion of clinical trials assessing interventions such as breast milk, lactoferrin, probiotics, and pentoxifylline. Finally, we critically appraise future treatment options such as stem cell therapy, other antimicrobial protein and peptides, and targeting of pattern recognition receptors in an effort to prevent and/or treat sepsis in this highly vulnerable neonatal population.
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Affiliation(s)
- Simone S. Schüller
- Division of Neonatology, Pediatric Intensive Care & Neuropediatrics, Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
- Precision Vaccines Program, Division of Infectious Diseases, Department of Medicine, Boston Children's Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Boris W. Kramer
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, Netherlands
- School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, Netherlands
| | - Eduardo Villamor
- Department of Pediatrics, Maastricht University Medical Centre (MUMC+), Maastricht, Netherlands
- School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, Netherlands
| | - Andreas Spittler
- Department of Surgery, Research Labs & Core Facility Flow Cytometry, Medical University of Vienna, Vienna, Austria
| | - Angelika Berger
- Division of Neonatology, Pediatric Intensive Care & Neuropediatrics, Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Ofer Levy
- Precision Vaccines Program, Division of Infectious Diseases, Department of Medicine, Boston Children's Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Broad Institute of MIT and Harvard, Boston, MA, United States
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15
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Scheible KM, Emo J, Laniewski N, Baran AM, Peterson DR, Holden-Wiltse J, Bandyopadhyay S, Straw AG, Huyck H, Ashton JM, Tripi KS, Arul K, Werner E, Scalise T, Maffett D, Caserta M, Ryan RM, Reynolds AM, Ren CL, Topham DJ, Mariani TJ, Pryhuber GS. T cell developmental arrest in former premature infants increases risk of respiratory morbidity later in infancy. JCI Insight 2018; 3:96724. [PMID: 29467329 DOI: 10.1172/jci.insight.96724] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 01/17/2018] [Indexed: 12/31/2022] Open
Abstract
The inverse relationship between gestational age at birth and postviral respiratory morbidity suggests that infants born preterm (PT) may miss a critical developmental window of T cell maturation. Despite a continued increase in younger PT survivors with respiratory complications, we have limited understanding of normal human fetal T cell maturation, how ex utero development in premature infants may interrupt normal T cell development, and whether T cell development has an effect on infant outcomes. In our longitudinal cohort of 157 infants born between 23 and 42 weeks of gestation, we identified differences in T cells present at birth that were dependent on gestational age and differences in postnatal T cell development that predicted respiratory outcome at 1 year of age. We show that naive CD4+ T cells shift from a CD31-TNF-α+ bias in mid gestation to a CD31+IL-8+ predominance by term gestation. Former PT infants discharged with CD31+IL8+CD4+ T cells below a range similar to that of full-term born infants were at an over 3.5-fold higher risk for respiratory complications after NICU discharge. This study is the first to our knowledge to identify a pattern of normal functional T cell development in later gestation and to associate abnormal T cell development with health outcomes in infants.
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Affiliation(s)
| | | | | | - Andrea M Baran
- Department of Biostatistics and Computational Biology, and
| | | | | | | | - Andrew G Straw
- Department of Biostatistics and Computational Biology, and
| | | | | | | | - Karan Arul
- Undergraduate Campus, University of Rochester, Rochester, New York, USA
| | | | | | | | | | - Rita M Ryan
- Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Anne Marie Reynolds
- Department of Pediatrics, State University of New York, University at Buffalo, Buffalo, New York, USA
| | - Clement L Ren
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
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16
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Surate Solaligue DE, Rodríguez-Castillo JA, Ahlbrecht K, Morty RE. Recent advances in our understanding of the mechanisms of late lung development and bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2017; 313:L1101-L1153. [PMID: 28971976 DOI: 10.1152/ajplung.00343.2017] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/21/2017] [Accepted: 09/23/2017] [Indexed: 02/08/2023] Open
Abstract
The objective of lung development is to generate an organ of gas exchange that provides both a thin gas diffusion barrier and a large gas diffusion surface area, which concomitantly generates a steep gas diffusion concentration gradient. As such, the lung is perfectly structured to undertake the function of gas exchange: a large number of small alveoli provide extensive surface area within the limited volume of the lung, and a delicate alveolo-capillary barrier brings circulating blood into close proximity to the inspired air. Efficient movement of inspired air and circulating blood through the conducting airways and conducting vessels, respectively, generates steep oxygen and carbon dioxide concentration gradients across the alveolo-capillary barrier, providing ideal conditions for effective diffusion of both gases during breathing. The development of the gas exchange apparatus of the lung occurs during the second phase of lung development-namely, late lung development-which includes the canalicular, saccular, and alveolar stages of lung development. It is during these stages of lung development that preterm-born infants are delivered, when the lung is not yet competent for effective gas exchange. These infants may develop bronchopulmonary dysplasia (BPD), a syndrome complicated by disturbances to the development of the alveoli and the pulmonary vasculature. It is the objective of this review to update the reader about recent developments that further our understanding of the mechanisms of lung alveolarization and vascularization and the pathogenesis of BPD and other neonatal lung diseases that feature lung hypoplasia.
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Affiliation(s)
- David E Surate Solaligue
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; and.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, German Center for Lung Research, Giessen, Germany
| | - José Alberto Rodríguez-Castillo
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; and.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, German Center for Lung Research, Giessen, Germany
| | - Katrin Ahlbrecht
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; and.,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, German Center for Lung Research, Giessen, Germany
| | - Rory E Morty
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany; and .,Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center, German Center for Lung Research, Giessen, Germany
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17
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Characterization of CD31 expression on murine and human neonatal T lymphocytes during development and activation. Pediatr Res 2017; 82:133-140. [PMID: 28355204 PMCID: PMC5509503 DOI: 10.1038/pr.2017.81] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 03/11/2017] [Indexed: 01/26/2023]
Abstract
BackgroundCD31, expressed by the majority of the neonatal T-cell pool, is involved in modulation of T-cell receptor signaling by increasing the threshold for T-cell activation. Therefore, CD31 could modulate neonatal tolerance and adaptive immune responses.MethodsLymphocytes were harvested from murine neonates at different ages, human late preterm and term cord blood, and adult peripheral blood. Human samples were activated over a 5-day period to simulate acute inflammation. Mice were infected with influenza; lungs and spleens were harvested at days 6 and 9 post infection and analyzed by flow cytometry.ResultsCD31-expressing neonatal murine CD4+ and CD8a+ T cells increase over the first week of life. Upon in vitro stimulation, human infants' CD4+ and CD8a+ T cells shed CD31 faster in comparison with adults. In the context of acute infection, mice infected at 3 days of age have an increased number of naive and activated CD31+ T lymphocytes at the site of infection at days 6 and 9 post infection, as compared with those infected at 7 days of age; however, the opposite is true in the periphery.ConclusionDifferences in trafficking of CD31+ cytotoxic T lymphocytes (CTLs) during acute influenza infection could modulate tolerance and contribute to a dampened adaptive immune response in neonates.
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18
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Vasu V, Turner KJ, George S, Greenall J, Slijepcevic P, Griffin DK. Preterm infants have significantly longer telomeres than their term born counterparts. PLoS One 2017; 12:e0180082. [PMID: 28658264 PMCID: PMC5489189 DOI: 10.1371/journal.pone.0180082] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/09/2017] [Indexed: 11/18/2022] Open
Abstract
There are well-established morbidities associated with preterm birth including respiratory, neurocognitive and developmental disorders. However several others have recently emerged that characterise an 'aged' phenotype in the preterm infant by term-equivalent age. These include hypertension, insulin resistance and altered body fat distribution. Evidence shows that these morbidities persist into adult life, posing a significant public health concern. In this study, we measured relative telomere length in leukocytes as an indicator of biological ageing in 25 preterm infants at term equivalent age. Comparing our measurements with those from 22 preterm infants sampled at birth and from 31 term-born infants, we tested the hypothesis that by term equivalent age, preterm infants have significantly shorter telomeres (thus suggesting that they are prematurely aged). Our results demonstrate that relative telomere length is highly variable in newborn infants and is significantly negatively correlated with gestational age and birth weight in preterm infants. Further, longitudinal assessment in preterm infants who had telomere length measurements available at both birth and term age (n = 5) suggests that telomere attrition rate is negatively correlated with increasing gestational age. Contrary to our initial hypothesis however, relative telomere length was significantly shortest in the term born control group compared to both preterm groups and longest in the preterm at birth group. In addition, telomere lengths were not significantly different between preterm infants sampled at birth and those sampled at term equivalent age. These results indicate that other, as yet undetermined, factors may influence telomere length in the preterm born infant and raise the intriguing hypothesis that as preterm gestation declines, telomere attrition rate increases.
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Affiliation(s)
- Vimal Vasu
- Department of Child Health, East Kent Hospitals University Foundation NHS Trust, William Harvey Hospital, Ashford, Kent, United Kingdom
- University of Kent, School of Biosciences, Giles Lane, Canterbury, Kent, United Kingdom
| | - Kara J. Turner
- University of Kent, School of Biosciences, Giles Lane, Canterbury, Kent, United Kingdom
| | - Shermi George
- Department of Child Health, East Kent Hospitals University Foundation NHS Trust, William Harvey Hospital, Ashford, Kent, United Kingdom
| | - John Greenall
- Department of Child Health, East Kent Hospitals University Foundation NHS Trust, William Harvey Hospital, Ashford, Kent, United Kingdom
| | - Predrag Slijepcevic
- Brunel University London, Department of Life Sciences, College of Health and Life Sciences, Uxbridge, Middlesex, United Kingdom
| | - Darren K. Griffin
- University of Kent, School of Biosciences, Giles Lane, Canterbury, Kent, United Kingdom
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19
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Zouikr I, Karshikoff B. Lifetime Modulation of the Pain System via Neuroimmune and Neuroendocrine Interactions. Front Immunol 2017; 8:276. [PMID: 28348566 PMCID: PMC5347117 DOI: 10.3389/fimmu.2017.00276] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 02/24/2017] [Indexed: 12/12/2022] Open
Abstract
Chronic pain is a debilitating condition that still is challenging both clinicians and researchers. Despite intense research, it is still not clear why some individuals develop chronic pain while others do not or how to heal this disease. In this review, we argue for a multisystem approach to understand chronic pain. Pain is not only to be viewed simply as a result of aberrant neuronal activity but also as a result of adverse early-life experiences that impact an individual's endocrine, immune, and nervous systems and changes which in turn program the pain system. First, we give an overview of the ontogeny of the central nervous system, endocrine, and immune systems and their windows of vulnerability. Thereafter, we summarize human and animal findings from our laboratories and others that point to an important role of the endocrine and immune systems in modulating pain sensitivity. Taking "early-life history" into account, together with the past and current immunological and endocrine status of chronic pain patients, is a necessary step to understand chronic pain pathophysiology and assist clinicians in tailoring the best therapeutic approach.
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Affiliation(s)
- Ihssane Zouikr
- Laboratory for Molecular Mechanisms of Thalamus Development, RIKEN BSI , Wako , Japan
| | - Bianka Karshikoff
- Department of Clinical Neuroscience, Division for Psychology, Karolinska Institutet, Solna, Sweden; Stress Research Institute, Stockholm University, Stockholm, Sweden
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20
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Misra RS, Bhattacharya S, Huyck HL, Wang JCE, Slaunwhite CG, Slaunwhite SL, Wightman TR, Secor-Socha S, Misra SK, Bushnell TP, Reynolds AM, Ryan RM, Quataert SA, Pryhuber GS, Mariani TJ. Flow-based sorting of neonatal lymphocyte populations for transcriptomics analysis. J Immunol Methods 2016; 437:13-20. [PMID: 27438473 DOI: 10.1016/j.jim.2016.07.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/12/2016] [Accepted: 07/12/2016] [Indexed: 12/31/2022]
Abstract
RATIONALE Emerging data suggest an important role for T lymphocytes in the pathogenesis of chronic lung disease in preterm infants. Comprehensive assessment of the lymphocyte transcriptome may identify biomarkers and mechanisms of disease. METHODS Small volume peripheral blood samples were collected from premature infants enrolled with consent in the Prematurity and Respiratory Outcomes Program (PROP), at the time of discharge from the hospital. Blood samples were collected at two sites and shipped to a central laboratory for processing. Peripheral blood mononuclear cells (PBMCs) were isolated by Ficoll-Hypaque gradient centrifugation and separated into individual lymphocyte cell types by fluorescence-activated cell sorting. Gating strategies were optimized to ensure reproducible recovery of highly purified lymphocyte populations over a multi-year recruitment period. RNA was isolated from sorted cells and characterized by high-throughput sequencing (RNASeq). RESULTS Blood volumes averaged 2.5ml, and sufficient PBMCs were collected from 165 of the 246 samples obtained (67%) from the 277 recruited subjects to complete sorting and RNASeq analysis on the resulting sorted cells. The number of total lymphocytes per ml of blood in the neonatal subjects was approximately 4 million/ml. Total lymphocyte frequencies recovered following sort varied widely among subjects, as did the frequency of individual lymphocyte and NK cell sub-populations. RNA yield from sorted cells varied according to cell type, but RNA of sufficient quantity and quality was recovered to enable RNASeq. SUMMARY Our results describe a validated procedure for the generation of genome-wide expression data from isolated lymphocyte sub-populations obtained from newborn blood.
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Affiliation(s)
- Ravi S Misra
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Soumyaroop Bhattacharya
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States; Pediatric Molecular and Personalized Medicine Program, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Heidie L Huyck
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Jyh-Chiang E Wang
- Rochester Human Immunology Center, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Christopher G Slaunwhite
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Sharleen L Slaunwhite
- Shared Resources Laboratories, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Terry R Wightman
- Shared Resources Laboratories, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Shelley Secor-Socha
- Rochester Human Immunology Center, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Sara K Misra
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Timothy P Bushnell
- Shared Resources Laboratories, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Ann-Marie Reynolds
- Department of Pediatrics, University at Buffalo, Buffalo, NY 14222, United States
| | - Rita M Ryan
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Sally A Quataert
- Rochester Human Immunology Center, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Gloria S Pryhuber
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States; Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642, United States
| | - Thomas J Mariani
- Department of Pediatrics, Division of Neonatology, University of Rochester Medical Center, Rochester, NY 14642, United States; Pediatric Molecular and Personalized Medicine Program, University of Rochester Medical Center, Rochester, NY 14642, United States
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21
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Abstract
Premature infants suffer significant respiratory morbidity during infancy with long-term negative consequences on health, quality of life, and health care costs. Enhanced susceptibility to a variety of infections and inflammation play a large role in early and prolonged lung disease following premature birth, although the mechanisms of susceptibility and immune dysregulation are active areas of research. This article reviews aspects of host-pathogen interactions and immune responses that are altered by preterm birth and that impact chronic respiratory morbidity in these children.
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Affiliation(s)
- Gloria S. Pryhuber
- Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, 601 Elmwood Avenue, Box 651, Rochester, NY 14642, USA,Department of Environmental Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA,Division of Neonatology, Department of Pediatrics, University of Rochester Medical Center, 601 Elmwood Avenue, Box 651, Rochester, NY 14642.
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