Exploring Chemical Composition Changes in Pinellia Tuber via Ginger–Aluminum Potassium Sulfate Processing

Abstract

Despite its recognized expectorant, antitussive, and antiemetic effects, Pinellia tuber (PT) requires processing to mitigate its toxicity and irritation prior to clinical application. Traditional PT processing methods include hot water washing and ginger–aluminum potassium sulfate (G-APS) treatment, each historically applied for distinct therapeutic purposes. Additional processing approaches have emerged in recent years, with reported compositional changes. However, the clinical relevance of traditional methods remains unclear. Among the chemical constituents of PT, lysophosphatidylcholines (LPCs) have garnered significant attention for their gastroprotective effects and pro-inflammatory activity. Although LPCs are pharmacologically significant, the influence of processing on their levels and the resulting effects of changes in their levels on the clinical utility of PT remain poorly understood. This study characterized chemical changes in PT induced by traditional processing and investigated the implications for detoxification and therapeutic applications. In this study, PT samples were subjected to no processing (control), hot water washing, or G-APS boiling, followed by chemical composition analysis using liquid chromatography–quadrupole time-of-flight tandem mass spectrometry. The metabolic profile of hot-water-treated PT samples resembled that of untreated samples, with hot water treatment primarily exerting a quantitative effect on LPC content. Conversely, G-APS processing induced both quantitative and qualitative changes in LPC content. The study findings illustrate that different processing methods generate distinct chemical profiles in PT, particularly concerning phospholipid content, highlighting the need to align processing selection with detoxification goals and therapeutic intent for efficacy and safety assurance. Thus, the treatment of crude drugs for detoxification purposes requires careful planning, as this process could simultaneously lead to a reduction in therapeutic efficacy.