Title:Antimicrobial Potential of Polyphenols: An Update on Alternative for
Combating Antimicrobial Resistance
Volume: 20
Issue: 6
Author(s): Alok Sharma*, Anurag, Jasleen Kaur, Anuradha Kesharwani and Vipan Kumar Parihar
Affiliation:
- Department of Pharmaceutical Technology, MIET, Meerut (UP), 250005, India
Keywords:
Medicinal plants, bioactive, polyphenols, antibacterial, bacterial resistance, structure-activity relationship.
Abstract: The last decade has encountered an increasing demand for plant-based natural antibiotics.
This demand has led to more research-based investigations for natural sources of antimicrobial
agents and published reports demonstrating that plant extracts are widely applied in modern medicine,
reporting potential activity that may be due to polyphenol compounds. Interestingly, the effects
of polyphenols on the sensitivity of bacteria to antibiotics have not been well-studied. Hence,
the current review encompasses the prospective application of plant-based phenolic extracts from
plants of Indian origin. The emergence of resistance to antimicrobial agents has increased the inefficacy
of many antimicrobial drugs. Several strategies have been developed in recent times to overcome
this issue. A combination of antimicrobial agents is employed for the failing antibiotics,
which restores the desirable effect but may have toxicity-related issues. Phytochemicals such as
some polyphenols have demonstrated their potent activity as antimicrobial agents of natural origin
to work against resistance issues. These agents alone or in combination with certain antibiotics have
been shown to enhance the antimicrobial activity against a spectrum of microbes. However, the
information regarding the mechanisms and structure-activity relationships remains elusive. The
present review also focuses on the possible mechanisms of natural compounds based on their structure-
activity relationships for incorporating polyphenolic compounds in the drug-development processes.
Besides this work, polyphenols could reduce drug dosage and may diminish the unhidden or
hidden side effects of antibiotics. Pre-clinical findings have provided strong evidence that polyphenolic
compounds, individually and in combination with already approved antibiotics, work well
against the development of resistance. However, more studies must focus on in vivo results, and
clinical research needs to specify the importance of polyphenol-based antibacterials in clinical trials.