Protocatechualdehyde in Medicine: What We Know and What Lies Ahead

Background: Protocatechualdehyde (PCA) is a naturally-occurring phenolic aldehyde commonly found in many plants and plant-based products. PCA has many possible health benefits. It has shown promising anti-oxidant, anti-inflammatory, anti-bacterial and anti-carcinogenic traits. Objective: In this study, we aim to explore PCA’s potential uses as a therapeutic agent and recommend future research directions. Methods: PubMed was searched in November 2024. Every article containing “protocatechualdehyde” or “protocatechuic aldehyde” in title or abstract were looked into and relevant studies selected. Results: PCA has the potential to be effective on a variety of disease. The top five most researched on conditions are: wound healing, atherosclerosis, myocardial ischemia, cerebrovascular disease, Parkinson’s disease. Articles mainly focus on cardiovascular, central nervous and urinary systems. Wound-sealant hydrogels containing PCA as a topical agent are an area of focus as well. anti-oxidant, anti-inflammatory, and anti-bacterial properties of PCA appear to give PCA its therapeutic potential. PCA can impact many intracellular pathways including Wnt/β-catenin signaling pathway and induce antiapoptotic proteins like B-cell lymphoma protein. Discussion: In conclusion, studies regarding PCA’s therapeutic use have been diverse, but dispersed, and in a few instances contradictory. PCA can have a positive impact on a range of illnesses and conditions in vitro and in vivo. It appears that PCA owes its therapeutic features to its strong anti-oxidant, anti-inflammatory, and anti-bacterial effects. However, current research lacks in showing PCA’s possible systemic effects and interaction with human body. PCA can become a potent pharmacological agent in the future, but still has a long journey ahead.