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Mendoza-Hernandez MA, Guzman-Esquivel J, Ramos-Rojas MA, Santillan-Luna VV, Sanchez-Ramirez CA, Hernandez-Fuentes GA, Diaz-Martinez J, Melnikov V, Rojas-Larios F, Martinez-Fierro ML, Tiburcio-Jimenez D, Rodriguez-Sanchez IP, Delgado-Enciso OG, Cabrera-Licona A, Delgado-Enciso I. Differences in the Evolution of Clinical, Biochemical, and Hematological Indicators in Hospitalized Patients with COVID-19 According to Their Vaccination Scheme: A Cohort Study in One of the World's Highest Hospital Mortality Populations. Vaccines (Basel) 2024; 12:72. [PMID: 38250885 PMCID: PMC10821037 DOI: 10.3390/vaccines12010072] [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: 11/30/2023] [Revised: 12/27/2023] [Accepted: 12/29/2023] [Indexed: 01/23/2024] Open
Abstract
COVID-19 vaccines primarily prevent severe illnesses or hospitalization, but there is limited data on their impact during hospitalization for seriously ill patients. In a Mexican cohort with high COVID-19 mortality, a study assessed vaccination's effects. From 2021 to 2022, 462 patients with 4455 hospital days were analyzed. The generalized multivariate linear mixed model (GENLINMIXED) with binary logistic regression link, survival analysis and ROC curves were used to identify risk factors for death. The results showed that the vaccinated individuals were almost half as likely to die (adRR = 0.54, 95% CI = 0.30-0.97, p = 0.041). When stratifying by vaccine, the Pfizer group (BNT162b2) had a 2.4-times lower risk of death (adRR = 0.41, 95% CI = 0.2-0.8, p = 0.008), while the AstraZeneca group (ChAdOx1-S) group did not significantly differ from the non-vaccinated (adRR = 1.04, 95% CI = 0.5-2.3, p = 0.915). The Pfizer group exhibited a higher survival, the unvaccinated showed increasing mortality, and the AstraZeneca group remained intermediate (p = 0.003, multigroup log-rank test). Additionally, BNT162b2-vaccinated individuals had lower values for markers, such as ferritin and D-dimer. Biochemical and hematological indicators suggested a protective effect of both types of vaccines, possibly linked to higher lymphocyte counts and lower platelet-to-lymphocyte ratio (PLR). It is imperative to highlight that these results reinforce the efficacy of COVID-19 vaccines. However, further studies are warranted for a comprehensive understanding of these findings.
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Affiliation(s)
- Martha A. Mendoza-Hernandez
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
- General Hospital of Zone 1, Colima Delegation, Mexican Institute of Social Security, Villa de Álvarez, Colima 28984, Mexico;
| | - Jose Guzman-Esquivel
- Clinical Epidemiology Research Unit, Mexican Institute of Social Security, Villa de Alvarez, Colima 28984, Mexico;
| | - Marco A. Ramos-Rojas
- General Hospital of Zone 1, Colima Delegation, Mexican Institute of Social Security, Villa de Álvarez, Colima 28984, Mexico;
| | - Vanessa V. Santillan-Luna
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | - Carmen A. Sanchez-Ramirez
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | - Gustavo A. Hernandez-Fuentes
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
- Cancerology State Institute, Colima State Health Services, Colima 28085, Mexico;
| | - Janet Diaz-Martinez
- Research Center in Minority Institutions, Robert Stempel College of Public Health, Florida International University, Miami, FL 33199, USA;
| | - Valery Melnikov
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | - Fabian Rojas-Larios
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | - Margarita L. Martinez-Fierro
- Molecular Medicine Laboratory, Academic Unit of Human Medicine and Health Sciences, Autonomous University of Zacatecas, Zacatecas 98160, Mexico;
| | - Daniel Tiburcio-Jimenez
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | - Iram P. Rodriguez-Sanchez
- Molecular and Structural Physiology Laboratory, School of Biological Sciences, Autonomous University of Nuevo Leon, San Nicolas de los Garza 66455, Mexico;
| | - Osiris G. Delgado-Enciso
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
| | | | - Ivan Delgado-Enciso
- School of Medicine, University of Colima, Colima 28040, Mexico; (M.A.M.-H.); (V.V.S.-L.); (C.A.S.-R.); (G.A.H.-F.); (V.M.); (F.R.-L.); (D.T.-J.); (O.G.D.-E.)
- Cancerology State Institute, Colima State Health Services, Colima 28085, Mexico;
- Department of Dietetics and Nutrition, Robert Stempel College of Public Health and Social Work, Florida International University, Miami, FL 33199, USA
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Elahi SM, Jiang J, Nazemi-Moghaddam N, Gilbert R. A Method to Generate and Rescue Recombinant Adenovirus Devoid of Replication-Competent Particles in Animal-Origin-Free Culture Medium. Viruses 2023; 15:2152. [PMID: 38005830 PMCID: PMC10674172 DOI: 10.3390/v15112152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/12/2023] [Accepted: 10/23/2023] [Indexed: 11/26/2023] Open
Abstract
Adenoviruses are promising vectors for vaccine production and gene therapy. Despite all the efforts in removing animal-derived components such as fetal bovine serum (FBS) during the production of adenovirus vector (AdV), FBS is still frequently employed in the early stages of production. Conventionally, first-generation AdVs (E1 deleted) are generated in different variants of adherent HEK293 cells, and plaque purification (if needed) is performed in adherent cell lines in the presence of FBS. In this study, we generated an AdV stock in SF-BMAdR (A549 cells adapted to suspension culture in serum-free medium). We also developed a limiting dilution method using the same cell line to replace the plaque purification assay. By combining these two technologies, we were able to completely remove the need for FBS from the process of generating and producing AdVs. In addition, we demonstrated that the purified AdV stock is free of any replication-competent adenovirus (RCA). Furthermore, we demonstrated that our limiting dilution method could effectively rescue an AdV from a stock that is highly contaminated with RCA.
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Affiliation(s)
- Seyyed Mehdy Elahi
- Department of Production Platforms & Analytics, National Research Council Canada, Building Montreal, 6100 Avenue Royalmount, Montreal, QC H4P 2R2, Canada; (J.J.); (N.N.-M.); (R.G.)
| | - Jennifer Jiang
- Department of Production Platforms & Analytics, National Research Council Canada, Building Montreal, 6100 Avenue Royalmount, Montreal, QC H4P 2R2, Canada; (J.J.); (N.N.-M.); (R.G.)
| | - Nazila Nazemi-Moghaddam
- Department of Production Platforms & Analytics, National Research Council Canada, Building Montreal, 6100 Avenue Royalmount, Montreal, QC H4P 2R2, Canada; (J.J.); (N.N.-M.); (R.G.)
| | - Rénald Gilbert
- Department of Production Platforms & Analytics, National Research Council Canada, Building Montreal, 6100 Avenue Royalmount, Montreal, QC H4P 2R2, Canada; (J.J.); (N.N.-M.); (R.G.)
- Department of Bioengineering, McGill University, Montreal, QC H3A 0E9, Canada
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Banoun H. mRNA: Vaccine or Gene Therapy? The Safety Regulatory Issues. Int J Mol Sci 2023; 24:10514. [PMID: 37445690 DOI: 10.3390/ijms241310514] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 06/09/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
COVID-19 vaccines were developed and approved rapidly in response to the urgency created by the pandemic. No specific regulations existed at the time they were marketed. The regulatory agencies therefore adapted them as a matter of urgency. Now that the pandemic emergency has passed, it is time to consider the safety issues associated with this rapid approval. The mode of action of COVID-19 mRNA vaccines should classify them as gene therapy products (GTPs), but they have been excluded by regulatory agencies. Some of the tests they have undergone as vaccines have produced non-compliant results in terms of purity, quality and batch homogeneity. The wide and persistent biodistribution of mRNAs and their protein products, incompletely studied due to their classification as vaccines, raises safety issues. Post-marketing studies have shown that mRNA passes into breast milk and could have adverse effects on breast-fed babies. Long-term expression, integration into the genome, transmission to the germline, passage into sperm, embryo/fetal and perinatal toxicity, genotoxicity and tumorigenicity should be studied in light of the adverse events reported in pharmacovigilance databases. The potential horizontal transmission (i.e., shedding) should also have been assessed. In-depth vaccinovigilance should be carried out. We would expect these controls to be required for future mRNA vaccines developed outside the context of a pandemic.
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