Pharmacological Activities of Flavonoids and Their Analogues 2024

A special issue of Pharmaceuticals (ISSN 1424-8247). This special issue belongs to the section "Natural Products".

Deadline for manuscript submissions: 25 August 2024 | Viewed by 1230

Special Issue Editors


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Guest Editor
Medical Research Unit in Pharmacology, Speciality Hospital, National Medical Center Siglo XXI, Av. Cuauhtémoc 330 Col Doctores, México City, CP 06725, México
Interests: pharmacognosy of Mexican medicinal plants; diabetes mellitus; cancer; diarrhea; molecular docking; secondary metabolites
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Medical Research Unit in Pharmacology, Speciality Hospital, National Medical Center Siglo XXI, Av. Cuauhtémoc 330 Col Doctores, Mexico City, CP 06725, Mexico
Interests: pharmacology; pharmacognosy; phytochemistry; medicinal plants; diabetes mellitus; cancer; diarrhea; drug development; isolation of natural compounds; terpenoids; flavonoids; molecular docking; molecular mechanism elucidation; pharmacological evaluation of natural compounds isolated from plants used in traditional Mexican medicine
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of new drugs continues to be an important point for global society. In recent years, there has been increased interest in the study of polyphenols due to the multiple pharmacological activities that they have demonstrated. Flavonoids are a class of polyphenols that have been widely studied; they are characterized as having a 15-carbon skeleton with a 2-phenylbenzopyranone core structure. They are classified as flavones, isoflavones, flavonols, anthocyanidins, flavanones, flavanols, chalcones and aurones. Within the various classes, further differentiation is possible based on the number and nature of substituent groups attached to the rings; moreover, flavonoids can exist as free aglycones or conjugated glycosidic bonds. Flavonoids are present in almost all types of nourishment, and recent studies have focused on their biological, nutritional, pharmacological and medicinal relevance. These kind of molecules, as well as their analogues, are of utmost relevance due to their multiple applications. Considering the above, we invite researchers to publish their findings on the pharmacological applications of flavonoids, as well as their analogs, while highlighting the importance of using these molecules as a basis for the development of new drugs.

Dr. Fernando Calzada
Dr. Miguel Valdes
Guest Editors

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Keywords

  • natural products
  • polyphenols
  • flavonoids
  • medicinal chemistry
  • traditional medicine
  • flavonoid isolation
  • flavonoid identification
  • flavonoid pharmacology
  • flavonoids as prodrugs
  • in vivo, in vitro and in silico studies
  • molecular modeling studies

Published Papers (1 paper)

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Research

15 pages, 3691 KiB  
Article
Antibacterial Activity and Mechanisms of Plant Flavonoids against Gram-Negative Bacteria Based on the Antibacterial Statistical Model
by Yu Yan, Xuexue Xia, Aiman Fatima, Li Zhang, Ganjun Yuan, Fengxian Lian and Yu Wang
Pharmaceuticals 2024, 17(3), 292; https://0-doi-org.brum.beds.ac.uk/10.3390/ph17030292 - 24 Feb 2024
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Abstract
The antimicrobial quantitative structure–activity relationship of plant flavonoids against Gram-positive bacteria was established in our previous works, and the cell membrane was confirmed as a major site of action. To investigate whether plant flavonoids have similar antibacterial effects and mechanisms against both Gram-negative [...] Read more.
The antimicrobial quantitative structure–activity relationship of plant flavonoids against Gram-positive bacteria was established in our previous works, and the cell membrane was confirmed as a major site of action. To investigate whether plant flavonoids have similar antibacterial effects and mechanisms against both Gram-negative and Gram-positive bacteria, here, the minimum inhibitory concentrations (MICs) of 37 plant flavonoids against Escherichia coli were determined using the microdilution broth method, and then the correlation between their lipophilic parameter ACD/LogP or LogD7.40 value and their MIC was analyzed. Simultaneously, the correlation between the ACD/LogP or LogD7.40 value and the MIC of 46 plant flavonoids reported in the literature against E. coli was also analyzed. Both sets of results showed that there is a significant correlation between the LogP value and the MIC of plant flavonoids against Gram-negative bacteria. However, it is difficult to effectively predict the MIC of plant flavonoids against Gram-negative bacteria from their lipophilic parameters. By comparing two regression curves derived from plant flavonoids against Gram-negative and Gram-positive bacteria, it was further discovered that the antibacterial activities of most plant flavonoids against Gram-negative bacteria are stronger than those against Gram-positive bacteria when their LogP values are less than approximately 3.0, but the opposite is true when their LogP values are more than approximately 3.6. Moreover, this comparison also suggests that unlike mainly acting on the cell membrane of Gram-positive bacteria, plant flavonoids have multiple mechanisms against Gram-negative species, while the cell membrane is also an important action site among them. Combined with the correlation analyses between the enzyme inhibitory activity and the LogP value of the reported flavonoids, it was further suggested that DNA gyrase is another important target of plant flavonoids against Gram-negative bacteria. Full article
(This article belongs to the Special Issue Pharmacological Activities of Flavonoids and Their Analogues 2024)
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