1
|
da Penha Gomes Gouvea M, Lira Machado KLL, de Oliveira YGP, Moulaz IR, Henriques AG, Gouveia TM, Thompson BP, Lança KEM, de Souza Ramos S, Lacerda GCC, Lenzi JPG, de Castro Pimentel F, Miossi JPM, Rassele ML, Camacho LAB, Villela DAM, de Lima SMB, de Souza Azevedo A, Horbach IS, de Araújo MF, Tort LFL, de Oliveira ACA, Siqueira MM, Garcia CC, da Costa-Rocha IA, Campi-Azevedo AC, Peruhype-Magalhães V, da Silva VG, Miyamoto ST, Dos Santos Fantoni RN, Pinto-Neto LF, Magda Domingues C, de Medeiros Junior NF, Burian AP, Teixeira-Carvalho A, Mota LMH, Mill JG, Martins-Filho OA, Valim V. Timeline kinetics of protective immunity to SARS-CoV-2 upon primary vaccination and humoral response to variants after booster dose. Vaccine 2023; 41:6514-6528. [PMID: 37661534 DOI: 10.1016/j.vaccine.2023.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 09/05/2023]
Abstract
New variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have emerged, imposing the need for periodic booster doses. However, whether booster doses should be applied to the entire population or groups, and the booster doses interval, remains unclear. In this study, we evaluated humoral reactivity kinetics from before the first dose to 180 days after the third booster dose in different schedules in a well-controlled health worker cohort. Among the 2,506 employees, the first 500 vaccinated health workers were invited to participate. The third booster dose was administered 8 months after the first dose. Among the invited participants, 470 were included in the study; 258 received inactivated vaccine CoronaVac (VAC group) and 212 received viral vector vaccine ChAdOx1 (AZV group). The groups were homogeneous in terms of age and sex. 347 participants were followed up after the booster dose with AZV or BNT162b2 (Pfizer, BNT group): 63 with VAC/AZV, 117 with VAC/BNT, 72 with the AZV/AZV and 95 with AZV/BNT schedules. Blood samples were collected immediately before, 28 days after each dose and 180 days after the primary vaccination and booster dose. Anti-SARS-CoV-2 antibodies were measured by chemiluminescence and plaque reduction neutralization test (PRNT). Plasma immune mediators were quantified using a multiplex immunoassay. Geometric mean of antibodies increased 28 days after the second dose with 100 % seroconversion rate in both groups and decreased 180 days after the first dose. In the baseline-seropositive VAC group, the levels of plasma immune mediators increased after the second dose. Booster dose was applied at 4-6 months after the primary vaccination. Heterologous booster in VAC or AZV primary vaccinees were effective maintaining the titers of anti-SARS-CoV-2 antibodies even after 6 months of follow-up. The heterologous schedule induced higher and stable antibody reactivity, even after 180 days, protecting to ancestral (Wuhan), Delta, and Omicron variants.
Collapse
Affiliation(s)
- Maria da Penha Gomes Gouvea
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil; Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - Ketty Lysie Libardi Lira Machado
- Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - Yasmin Gurtler Pinheiro de Oliveira
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil; Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - Isac Ribeiro Moulaz
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Allan Gonçalves Henriques
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Thayná Martins Gouveia
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Beatriz Paoli Thompson
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Karen Evelin Monlevade Lança
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Sabrina de Souza Ramos
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | | | - João Pedro Gonçalves Lenzi
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Felipe de Castro Pimentel
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - João Pedro Moraes Miossi
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | - Matheus Leite Rassele
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | | | | | - Sheila Maria Barbosa de Lima
- Laboratório de Tecnologia Virológica (LATEV), Instituto de Tecnologia em Imunobiológicos (Bio-Manguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Adriana de Souza Azevedo
- Laboratório de Tecnologia Virológica (LATEV), Instituto de Tecnologia em Imunobiológicos (Bio-Manguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Ingrid Siciliano Horbach
- Laboratório de Tecnologia Virológica (LATEV), Instituto de Tecnologia em Imunobiológicos (Bio-Manguinhos), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Mia Ferreira de Araújo
- Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências Virais (LVRE), Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Luis Fernando Lopez Tort
- Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências Virais (LVRE), Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Any Caroline Alves de Oliveira
- Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências Virais (LVRE), Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Marilda Mendonça Siqueira
- Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências Virais (LVRE), Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | - Cristiana Couto Garcia
- Instituto René Rachou, Fundação Oswaldo Cruz (FIOCRUZ-Minas), Belo Horizonte, MG, Brazil; Laboratório de Vírus Respiratórios, Exantemáticos, Enterovírus e Emergências Virais (LVRE), Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, RJ, Brazil
| | | | | | | | - Vanézia Gonçalves da Silva
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil; Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - Samira Tatiyama Miyamoto
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil
| | | | | | - Carla Magda Domingues
- External Consultant, Temporary Consulting of the Pan American Health Organization, Brazil
| | - Nésio Fernandes de Medeiros Junior
- Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil; Secretaria de Saúde do Estado do Espírito Santo, Vitória, ES, Brazil
| | - Ana Paula Burian
- Secretaria de Saúde do Estado do Espírito Santo, Vitória, ES, Brazil
| | | | | | - José Geraldo Mill
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil; Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | | | - Valéria Valim
- Hospital Universitário Cassiano Antônio Moraes, Universidade Federal do Espírito Santo (HUCAM-UFES/EBSERH), Vitória, ES, Brazil; Programa de Pós-graduação em Saúde Coletiva (PPGSC), Centro de Ciências Médicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil.
| |
Collapse
|
2
|
Polese J, Ramos AD, Moulaz IR, Sant'Ana L, Lacerda BSDP, Soares CES, Lança KEM, Thompson BP, Júnior GPB, Polese Pinto II, Mill JG. Pulmonary function and exercise capacity six months after hospital discharge of patients with severe COVID-19. Braz J Infect Dis 2023; 27:102789. [PMID: 37442195 PMCID: PMC10403708 DOI: 10.1016/j.bjid.2023.102789] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 05/30/2023] [Accepted: 07/01/2023] [Indexed: 07/15/2023] Open
Abstract
INTRODUCTION The long-term consequences of COVID-19, especially pulmonary impairment, are frequent but not well understood. The knowledge about sequels or long COVID-19 are necessary, considering the high prevalence and need for specific public strategies. METHOD The study was conducted to evaluate symptoms (standardized questionnaire), pulmonary function (spirometry), and exercise capacity (6-minute-walk-test) at 30 (D30), 90 (D90), and 180 (D180) days after hospital discharge of patients surviving to severe COVID-19. We excluded in this follow up patients with comorbidities before COVID infection. RESULTS 44 patients were included and 31 (26 men) completed the 6-month follow-up (age mean 53.6 ± 9.6 years). At D180, 28% presented still at least one symptom. The most common was dyspnea (17.2%), followed by cough (13.8%), and myalgia (10.3%). All spirometric parameters showed progressive improvement from D30 to D180. However, 16% maintained a restrictive pattern on spirometry test, 44% presented desaturation on the 6-minute walk-test, and 25% walked < 75% of the predicted value. CONCLUSION 6-months after hospital discharge, reduced pulmonary function and reduced exercise capacity was founded frequently and more than a quarter remained symptomatic. The persistent symptoms and functional impairment suggest that sequels and development of Long COVID-19 are very common. The identification of these patients to provide the necessary health care is a challenging task, considering the large number of patients infected and surviving to COVID-19 disease.
Collapse
Affiliation(s)
- Jessica Polese
- Universidade Federal do Espírito Santo, Departamento de Pneumologia, Vitória, ES, Brazil.
| | | | | | | | | | | | | | | | | | | | - José Geraldo Mill
- Universidade Federal do Espírito Santo, Departamento de Ciências Fisiológicas, Vitória, ES, Brazil
| |
Collapse
|
3
|
Gouvea MDPG, Moulaz IR, Gouveia TM, Lança KEM, Lacerda BSDP, Thompson BP, Polese J, de Lima MD, Ribeiro-Rodrigues R, Mill JG, Valim V. Anti-SARS-CoV-2 antibody immunoreactivity profiles during COVID-19 recurrence. Rev Soc Bras Med Trop 2022; 55:e01062022. [PMID: 36287469 PMCID: PMC9592100 DOI: 10.1590/0037-8682-0106-2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 09/09/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND This study aimed to evaluate IgG and IgM levels in COVID-19 recurrence. METHODS The serum antibody levels and clinical data from 73 healthcare workers with SARS-CoV-2 divided into seroconverted (n=51) and non-seroconverted (n=22) groups were assessed. The presence of specific anti-nucleocapsid (anti-N) IgM and IgG for SARS-CoV-2 was evaluated. IgG antibodies to the SARS-CoV-2 spike receptor-binding domain were used to confirm non-seroconversion in all negative anti-N. RESULTS Four recurrent cases displayed mild symptoms and were non-seroconverted until the recurrence of symptoms. CONCLUSIONS Undetectable anti-nucleocapsid IgM and IgG levels may be correlated with symptomatic COVID-19 recurrence.
Collapse
Affiliation(s)
| | - Isac Ribeiro Moulaz
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Vitória, ES, Brasil
| | - Thayná Martins Gouveia
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Vitória, ES, Brasil
| | | | | | - Beatriz Paoli Thompson
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Vitória, ES, Brasil
| | - Jéssica Polese
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Departamento de Pneumologia, Vitória, ES, Brasil
| | - Marina Deorce de Lima
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Vitória, ES, Brasil
| | - Rodrigo Ribeiro-Rodrigues
- Departamento de Saúde do Estado do Espírito Santo, Laboratório de Saúde Pública do Estado do Espírito Santo, Vitória, ES, Brasil., Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Centro de Doenças Infecciosas, Vitória, ES, Brasil
| | - José Geraldo Mill
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Departamento de Ciências Fisiológicas, Vitória, ES, Brasil
| | - Valéria Valim
- Universidade Federal do Espírito Santo, Hospital Universitário Cassiano Antonio Moraes, Divisão de Reumatologia, Vitória, ES, Brasil
| |
Collapse
|
4
|
Gouvea MDPG, Moulaz IR, Gouveia TM, Lança KEM, Lacerda BSDP, Thompson BP, Mill JG, Valim V. CORRELAÇÃO CLÍNICA COM REATIVIDADE IMUNE APÓS INFECÇÃO LEVE A MODERADA POR COVID-19 EM UMA COORTE DE TRABALHADORES DA SAÚDE. Braz J Infect Dis 2022. [PMCID: PMC8829243 DOI: 10.1016/j.bjid.2021.101709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Introdução Métodos Resultados Conclusão
Collapse
|
5
|
Koppen IJN, Thompson BP, Ambeba EJ, Lane VA, Bates DG, Minneci PC, Deans KJ, Levitt MA, Wood RJ, Benninga MA, Di Lorenzo C, Yacob D. Segmental colonic dilation is associated with premature termination of high-amplitude propagating contractions in children with intractable functional constipation. Neurogastroenterol Motil 2017; 29:1-9. [PMID: 28524640 DOI: 10.1111/nmo.13110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/18/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Colonic dilation is common in children with intractable functional constipation (FC). Our aim was to describe the association between segmental colonic dilation and colonic dysmotility in children with FC. METHODS We performed a retrospective study on 30 children with intractable FC (according to the Rome III criteria) who had undergone colonic manometry and contrast enema within a 12-month time period. Colonic diameter was measured at 5 cm intervals from the anal verge up to the splenic flexure. Moreover, the distance between the lateral margins of the pedicles of vertebra L2 was measured to provide a ratio (colonic diameter or length/distance between the lateral margins; "standardized colon size" [SCS]). All manometry recordings were visually inspected for the presence of high-amplitude propagating contractions (HAPCs); a parameter for colonic motility integrity. The intracolonic location of the manometry catheter sensors was assessed using an abdominal X-ray. KEY RESULTS Colonic segments with HAPCs had a significantly smaller median diameter than colonic segments without HAPCs (4.08 cm vs 5.48 cm, P<.001; SCS 1.14 vs 1.66, P=.001). Children with prematurely terminating HAPCs had significantly larger SCS ratios for colonic diameter than children with fully propagating HAPCs (P=.008). SCS ratios for the length of the rectosigmoid and the descending colon and the SCS ratio for sigmoid colon diameter were significantly larger in children with FC compared to a previously described normative population (P<.0001, P<.0001 and P=.0007 respectively). CONCLUSIONS & INFERENCES Segmental colonic dilation was associated with prematurely terminating HAPCs and may be a useful indicator of colonic dysmotility.
Collapse
Affiliation(s)
- I J N Koppen
- Division of Pediatric Gastroenterology and Nutrition, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Pediatric Gastroenterology and Nutrition, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands
| | - B P Thompson
- Department of Radiology, Nationwide Children's Hospital, Columbus, OH, USA
| | - E J Ambeba
- Center for Surgical Outcomes Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - V A Lane
- Center for Surgical Outcomes Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Division of Pediatric Surgery, Department of Surgery, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Surgery, Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - D G Bates
- Department of Radiology, Nationwide Children's Hospital, Columbus, OH, USA
| | - P C Minneci
- Center for Surgical Outcomes Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Division of Pediatric Surgery, Department of Surgery, Nationwide Children's Hospital, Columbus, OH, USA
| | - K J Deans
- Center for Surgical Outcomes Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Division of Pediatric Surgery, Department of Surgery, Nationwide Children's Hospital, Columbus, OH, USA
| | - M A Levitt
- Division of Pediatric Surgery, Department of Surgery, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Surgery, Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - R J Wood
- Division of Pediatric Surgery, Department of Surgery, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Surgery, Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - M A Benninga
- Department of Pediatric Gastroenterology and Nutrition, Emma Children's Hospital/Academic Medical Center, Amsterdam, The Netherlands
| | - C Di Lorenzo
- Division of Pediatric Gastroenterology and Nutrition, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Surgery, Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| | - D Yacob
- Division of Pediatric Gastroenterology and Nutrition, Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA.,Department of Surgery, Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, The Ohio State University, Columbus, OH, USA
| |
Collapse
|
6
|
Thompson BP, Hugo G. SU-GG-J-154: Quality and Accuracy of Cone Beam Computed Tomography Gated by Active Breathing Control. Med Phys 2008. [DOI: 10.1118/1.2961703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
7
|
Van Zant G, Scott-Micus K, Thompson BP, Fleischman RA, Perkins S. Stem cell quiescence/activation is reversible by serial transplantation and is independent of stromal cell genotype in mouse aggregation chimeras. Exp Hematol 1992; 20:470-5. [PMID: 1568464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We made use of a previously described in vivo model of chimeric mice created by embryo aggregation that allows the study of contributions to both lymphohematopoiesis and marrow stroma by two genotypically distinct cell populations. Day-2 embryos from C57BL/6 and DBA/2 strains were fused to produce allophenic chimeric mice that proved to have contributions from each strain in all the tissues of the body and that permitted study of competitive contributions to blood formation. Although the contribution of DBA/2 stem cells to hematopoiesis gradually ceased in an age-related manner so that all blood cells in aged chimeras were C57BL/6 in origin, here we show that, in contrast, the extent of stromal chimerism, determined by the fibroblast colony-forming unit (CFU-F) assay, was maintained and was remarkably uniform from one marrow site to another. This result is consistent with a polyclonal nonhematopoietic origin of the CFU-F and suggests that the decline in DBA/2 blood cells was not dependent on similar changes in genotype-matched stroma, but was instead an intrinsic property of this stem cell population. These intrinsic stem cell properties were further examined by serial bone marrow transplantation. When marrow from a chimera with no detectable DBA/2 blood cells was transplanted into irradiated recipients, cells of DBA/2 genotype significantly contributed to early hematopoietic engraftment, demonstrating that the DBA/2 stem cell population was not extinguished in the chimeric donor, but rather had entered a reversible state of quiescence. Reactivation of the DBA/2 stem cell population, however, was short-lived, and long-term engraftment of recipients was accomplished by donor cells of the partner strain (C57BL/6). However, transient reactivation of the quiescent (DBA/2) stem cell pool again occurred with a second round of transplantation. These surprising results demonstrate, for the first time, selective and reiterated inactivation and reactivation of a stem cell population depending on hematopoietic needs. Moreover, the results suggest that genetic differences in the stem cell populations of coexistent strains account for the selective responses described.
Collapse
Affiliation(s)
- G Van Zant
- Department of Cell Biology and Anatomy, Texas Tech University Health Sciences Center, Lubbock 79430
| | | | | | | | | |
Collapse
|
8
|
Van Zant G, Thompson BP, Chen JJ. Differentiation of chimeric bone marrow in vivo reveals genotype-restricted contributions to hematopoiesis. Exp Hematol 1991; 19:941-9. [PMID: 1893972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Bone marrow transplantation is of increasing utility in cancer treatment and is an important component of gene therapy protocols. Understanding the functional identities of progenitor cells involved in repopulation is important for the optimal application of this procedure. We have simultaneously used two types of genetic markers to study engraftment of mice after irradiation. The first involves intrinsic genetic differences, including a cellular marker, between two mouse strains used to construct chimeric mice by aggregating embryos. To produce a second marking system, bone marrow from these allophenic mice was subsequently infected with retrovirus. Individual progenitor cells, including primitive lympho-hematopoietic stem cells, participating in repopulation were identified by virtue of their uniquely marked clonal progeny. In this way numbers and genotypic identities of clones contributing to repopulation were determined. Engraftment could be divided into two distinguishable temporal phases. The first comprised roughly the first 3-4 months following transplant and was characterized by numerous clones, many of which apparently had limited lineage potencies. The subsequent phase was characterized by few, often a single, clones represented in all lympho-hematopoietic tissues. These findings are consistent with the notion that different classes of progenitor cells are differentially responsible for temporal progression. More differentiated, perhaps lineage restricted, progenitors transiently dominate the first few months before the emergence of pluripotent stem cell clones. Senescence of progenitors of the first phase may reflect their limited lifespans. A clear genotypic difference was obvious in engraftment. Cells of one strain, DBA/2, completely dominated the first temporal phase, whereas the C57BL/6 partner strain dominated the second phase. The genotype-restricted dominance of different stages of repopulation suggests important differences in the organization and regulation of stem and progenitor cell populations. Inherent differences in seeding, proliferation, and differentiation of progenitors of the two inbred strains may account for the differences. This in vivo model of competitive repopulation provides the opportunity to explore potentially important loci in the process of engraftment. We propose that DBA/2 progenitor cells, due to a proliferative and/or numerical advantage, account for their superiority immediately after engraftment. C57BL/6 stem cells, with long-term repopulating potential, predominate later, perhaps because of subtle numerical or proliferative advantages.
Collapse
Affiliation(s)
- G Van Zant
- Department of Cell Biology and Anatomy, Texas Tech University Health Sciences Center, Lubbock 79430
| | | | | |
Collapse
|
9
|
Abstract
A case of posttransfusion purpura is reported in a 90-year-old patient whose PlA1 antibody (anti-HPA-1a) was found to bind better to HPA-1a in the presence of captopril, a drug the patient had taken. Initially, IgG antibodies were found in the serum that reacted with normal platelets, but the binding of the antibody was increased in vitro by captopril, which suggested that captopril was responsible for the thrombocytopenia. However, in vitro studies demonstrated that the patient's platelets were negative for HPA-1a and that anti-HPA-1a was present in the serum, both of which findings were consistent with the diagnosis of posttransfusion purpura. The binding of this antibody was enhanced 50 percent by captopril in vitro, and increased binding in the presence of captopril did not occur when the anti-HPA-1a was removed. Similar results were obtained with serum containing anti-HPA-1a from another patient with posttransfusion purpura. Thus, captopril may increase the binding of anti-HPA-1a and confuse the determination of the cause of acute thrombocytopenia.
Collapse
Affiliation(s)
- G Bepler
- Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | | | | | | | | |
Collapse
|