A plasmid production process has been established to manufacture plasmid DNA at a large scale in High-Quality grade. This is used as a starting material to produce mRNA vaccines for clinical trials. Recently, the World Health Organization (WHO) has released regulatory guidelines related to the quality, safety, and efficacy for DNA- as well as for mRNA-based vaccines. Following an extraordinary year of scientific, regulatory, and manufacturing developments, the scientific community today stands considerably better equipped to deal with urgent production requirements in large scale for nucleic acid-based vaccinations and therapies. Going forward, work needs to be done in better coordinating the supply and logistics of essential raw materials for biological manufacturing, especially under emergency conditions.
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http://dx.doi.org/10.1007/978-1-0716-3770-8_14 | DOI Listing |
PLoS Negl Trop Dis
January 2025
Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America.
Background: Machupo virus (MACV) is a New World mammarenavirus (hereafter referred to as "arenavirus") and the etiologic agent of Bolivian hemorrhagic fever (BHF). No vaccine or antiviral therapy exists for BHF, which causes up to 35% mortality in humans. New World arenaviruses evolve separately in different locations.
View Article and Find Full Text PDFVaccines (Basel)
January 2025
Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai 200032, China.
Background: Inefficient cellular uptake is a significant limitation to the efficacy of DNA vaccines. In this study, we introduce S-Cr9T, a stearyl-modified cell-penetrating peptide (CPP) designed to enhance DNA vaccine delivery by forming stable complexes with plasmid DNA, thereby protecting it from degradation and promoting efficient intracellular uptake.
Methods And Results: In vitro studies showed that S-Cr9T significantly improved plasmid stability and transfection efficiency, with optimal performance at an N/P ratio of 0.
Vaccines (Basel)
January 2025
National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100052, China.
Background: The development of a protective vaccine is critical for conclusively ending the human immunodeficiency virus (HIV) epidemic.
Methods: We constructed nucleotide-modified mRNA vaccines expressing HIV-1 Env and Gag proteins. Env-gag virus-like particles (VLPs) were generated through co-transfection with env and gag mRNA vaccines.
Curr Issues Mol Biol
December 2024
College of Agriculture and Biology, Liaocheng University, Liaocheng 252000, China.
To clone DNA sequences quickly and precisely into plasmids is essential for molecular biology studies. Some cloning vectors have been developed for the cloning of PCR products, including blunt-end and T-A cloning. However, different plasmids are required for the cloning of PCR products with blunt ends and 3' A overhang ends.
View Article and Find Full Text PDFJ Endocr Soc
January 2025
Division of Pediatric Endocrinology, Hadassah Medical Center, Jerusalem 91240, Israel.
Context: Despite a growing number of studies, the genetic etiology in many cases of ovarian dysgenesis is incompletely understood.
Objectives: This work aimed to study the genetic etiology causing absence of spontaneous pubertal development, hypergonadotropic hypogonadism, and primary amenorrhea in 2 sisters.
Methods: Whole-exome sequencing was performed on DNA extracted from peripheral lymphocytes of 2 Palestinian sisters born to consanguineous parents.
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