Pentacyclic triterpenoids: diversity, distribution and their propitious pharmacological potential

Pentacyclic triterpenoids are considered as compounds with 30 carbon atom basic structure that are widely spread across the plant kingdom, and to a limited extent in marine organisms. Amongst various types of pentacyclic triterpenoids, oleanane, ursane and lupane type occur in abundance, and therefore have garnered significant attention. These potent compounds have exhibited anti-inflammatory, anticancer, antidiabetic, neuroprotective, hepatoprotective antimicrobial etc., activities. Due to their structural diversity, they act on different molecular markers and have exhibited numerous biological activities by virtue of different mechanistic pathways. This review provides an overview on pentacyclic triterpenoids starting with their distribution, structural diversity and biosynthesis. This review also highlights the therapeutic potential of pentacyclic triterpenoids. A detailed analysis of their anti-inflammatory, anticancer, antidiabetic, hepatoprotective, and neuroprotective activities is presented. The molecular mechanisms underlying these pharmacological effects, including modulation of signaling pathways, enzyme inhibition, and interaction with cellular targets, are thoroughly discussed. In conclusion, this comprehensive review synthesizes the current state of knowledge on pentacyclic triterpenoids, providing valuable insights into their therapeutic potential and underlying molecular mechanisms. The information presented herein will serve as a foundation for future research endeavors, drug development, and the exploration of novel applications for these natural compounds.