Phytochemical Investigation and Pharmacological Activity of Active Ingredient Isolated from Hygrophila Salicifolia

Abstract

xviii newlineABSTRACT newlineThe exploration of medicinal plants for bioactive compounds has gained immense scientific significance due to their therapeutic potential and minimal side effects. Hygrophila salicifolia (Family: Acanthaceae), a lesser-studied ethnomedicinal herb, has been traditionally used for its diuretic, hepatoprotective, anti-inflammatory, antioxidant, and wound-healing properties. However, its phytochemical composition and pharmacological basis of activity remain inadequately investigated. The present research work was therefore undertaken to isolate, characterize, and evaluate the pharmacological activity of the active ingredient(s) from Hygrophila salicifolia with the aim of establishing a scientific rationale for its traditional therapeutic claims. newlineThe study began with the collection, authentication, and extraction of Hygrophila salicifolia using solvents of varying polarity through Soxhlet and maceration techniques. The obtained extracts were subjected to preliminary phytochemical screening, which revealed the presence of flavonoids, alkaloids, steroids, terpenoids, phenolics, and glycosides. Among the tested extracts, the methanolic extract exhibited the most significant activity and was selected for further bioactivity-guided fractionation. newlineThe isolation and purification of the active fraction were performed using chromatographic techniques such as column chromatography, preparative TLC, and HPTLC, followed by spectroscopic characterization (UV, FTIR, NMR, and LC-MS) to determine the structural identity of the bioactive constituent. The isolated compound was confirmed to belong to the class of polyphenolic flavonoids, which are known to possess strong antioxidant and anti-inflammatory properties. newlinexix newlineThe pharmacological evaluation was conducted to assess antioxidant, anti-inflammatory, hepatoprotective, and wound-healing activities using both in vitro and in vivo models. The results demonstrated that the isolated compound significantly reduced oxidative stress markers, inhibited inflammatory mediators, and promoted tissue regeneration, indicating a potent pharmacological profile. Comparative studies with standard drugs validated the effectiveness of the isolated phytoconstituent, with minimal toxicity and favorable therapeutic index. newlineFurthermore, mechanistic studies suggested that the bioactive compound exerts its effects through the modulation of oxidative and inflammatory pathways, particularly by enhancing endogenous antioxidant enzymes and suppressing pro-inflammatory cytokines. The compound also showed a promising free radical scavenging potential in DPPH and ABTS assays, confirming its antioxidant efficacy. newlineIn conclusion, the study successfully isolated and characterized a pharmacologically active compound from Hygrophila salicifolia that exhibits potent antioxidant and anti-inflammatory activities. These findings provide a scientific basis for the traditional use of Hygrophila salicifolia and highlight its potential as a source for the development of novel phytotherapeutic agents. newlineThis research contributes valuable knowledge to the field of natural product pharmacology and supports the continued exploration of plant-derived bioactive molecules for the development of safe and effective herbal medicines. newline