Near-Infrared Spectroscopy Combined with Absorbance Upper Optimization Partial Least Squares Applied to Rapid Analysis of Polysaccharide for Proprietary Chinese Medicine Oral Solution

Near-infrared (NIR) spectroscopy was applied to reagent-free quantitative analysis of polysaccharide of a brand product of proprietary Chinese medicine (PCM) oral solution samples. A novel method, called absorbance upper optimization partial least squares (AUO-PLS), was proposed and successfully applied to the wavelength selection. Based on varied partitioning of the calibration and prediction sample sets, the parameter optimization was performed to achieve stability. On the basis of the AUO-PLS method, the selected upper bound of appropriate absorbance was 1.53 and the corresponding wavebands combination was 400 - 1880 & 2088 - 2346 nm. With the use of random validation samples excluded from the modeling process, the root-mean-square error and correlation coefficient of prediction for polysaccharide were 27.09 mg·L-1 and 0.888, respectively. The results indicate that the NIR prediction values are close to those of the measured values. NIR spectroscopy combined with AUO-PLS method provided a promising tool for quantification of the polysaccharide for PCM oral solution and this technique is rapid and simple when compared with conventional methods.

Evolution of the registration regulations for proprietary Chinese medicines in China

In this review, we provide a comprehensive overview on the registration of proprietary Chinese medicines(PCMs) in China over the past century by examining published literature and historical data. We will examine this evolving administrative practice for PCMs registration in China, which is divided to the following five stages:(1) initial measures(1915-1948);(2) early development(1949-1965);(3) provincial approval and trial implementation of the "approval number" system(1966-1984);(4) legislation and cleanup(1985-1999); and(5) centralized national approval(2000 until now), offering a panoramic view on the characteristics of PCMs registration management in China.

Mechanism of Metabolic Dysfunction-associated Steatotic Liver Disease:Important role of lipid metabolism

Metabolic dysfunction-associated steatotic liver disease(MASLD),formerly known as non-alcoholic fatty liver disease,has a high global prevalence and can progress to metabolic dysfunction-associated steatohepatitis,cirrhosis,and hepatocellular carcinoma.The pathogenesis of MASLD is primarily driven by disturbances in hepatic lipid metabolism,involving six key processes:increased hepatic fatty acid uptake,enhanced fatty acid synthesis,reduced oxidative degradation of fatty acids,increased cholesterol uptake,elevated cholesterol synthesis,and increased bile acid synthesis.Consequently,maintaining hepatic lipid metabolic homeostasis is essential for effective MASLD management.Numerous novel molecules and Chinese proprietary medicines have demonstrated promising therapeutic potential in treating MASLD,primarily by inhibiting lipid synthesis and promoting lipid oxidation.In this review,we summarized recent research on MASLD,elucidated the molecular mechanisms by which lipid metabolism disorders contribute to MASLD pathogenesis,and discussed various lipid metabolism-targeted therapeutic approaches for MASLD.