Journal of Microbiology

Jeong-Ki Kim

2 Articles

Phytochemicals for the treatment of COVID-19: Erica Españo , Jiyeon Kim , Kiho Lee , Jeong-Ki Kim; J. Microbiol. 2021;59(11):959-977. Published online November 1, 2021; DOI: https://doi.org/10.1007/s12275-021-1467-z

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The coronavirus disease 2019 (COVID-19) pandemic has underscored the lack of approved drugs against acute viral diseases. Plants are considered inexhaustible sources of drugs for several diseases and clinical conditions, but plant-derived compounds have seen little success in the field of antivirals. Here, we present the case for the use of compounds from vascular plants, including alkaloids, flavonoids, polyphenols, and tannins, as antivirals, particularly for the treatment of COVID-19. We review current evidence for the use of these phytochemicals against SARS-CoV-2 infection and present their potential targets in the SARS-CoV-2 replication cycle.

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Preliminary Study about Sublingual Administration of Bacteria-expressed Pandemic H1N1 Influenza Vaccine in Miniature Pigs: Hyekwon Kim , Jeong-Ki Kim , Hohyun Song , Jungah Choi , Byoungshik Shim , Bokyu Kang , Hyoungjoon Moon , Minjoo Yeom , Sang-Hyun Kim , Daesub Song , Manki Song; J. Microbiol. 2014;52(9):794-800. Published online July 30, 2014; DOI: https://doi.org/10.1007/s12275-014-4289-4

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Abstract PDF

Sublingual (SL) administration of influenza vaccine would be non-invasive and effective way to give human populations protective immunity against the virus, especially when pandemic influenza outbreaks. In this study, the efficacy of pandemic influenza virus-based subunit vaccines was tested after sublingual (SL) adjuvant administration in pigs. Eight specific pathogen-free Yucatan pigs were divided into 4 groups: nonvaccinated but challenged (A) and vaccinated and challenged (B, C, and D). The vaccinated groups were subdivided by vaccine type and inoculation route: SL subunit vaccine (hemagglutinin antigen 1 [HA1] + wild-type cholera toxin [wtCT], B); IM subunit vaccine (HA1 + aluminum hydroxide, C); and IM inactivated vaccine (+ aluminum hydroxide, D). The vaccines were administered twice at a 2-week interval. All pigs were challenged with pandemic influenza virus (A/swine/ GCVP-KS01/2009 [H1N1]) and monitored for clinical signs, serology, viral shedding, and histopathology. After vaccination, hemagglutination inhibition titre was higher in group D (320) than in the other vaccinated groups (40–80) at the time of challenge. The mobility and feed intake were reduced in group C. Both viral shedding and histopathological lesions were reduced in groups B and D. Although this study has limitation due to the limited number of pigs (2 pigs per a group), the preliminary data in this study provided the protective potential of SL administration of bacteria-expressed pandemic H1N1 influenza vaccine in pigs. There should be additional animal studies about effective adjuvant system and vaccine types for the use of SL influenza vaccination.

Citations

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