Ying Shao

Phellinus igniarius is a medicinal fungus rich in terpenoids with potential biological activities. In this study, the P. igniarius terpenoid-enriched extract (PITT) was optimized using single-factor experiments combined with response surface methodology based on a Box–Behnken design. The optimal extraction conditions were determined as extraction temperature 64 °C, extraction time 21 min, ethanol concentration 78%, and liquid-to-solid ratio 20 mL/g, yielding a total terpenoid content of 7.078 mg/g. The chemical profile of PITT was characterized by liquid chromatography–tandem mass spectrometry (LC–MS/MS), revealing the presence of multiple putative terpenoid compounds, including betulin, curdione, and several sesquiterpenoids. The antioxidant activity of PITT was evaluated using DPPH, ABTS, and hydroxyl radical scavenging assays, showing dose-dependent effects. Furthermore, an H₂O₂-induced oxidative stress model in RAW 264.7 cells was employed to assess cellular antioxidant activity. Pretreatment with PITT significantly reduced intracellular reactive oxygen species (ROS) levels, enhanced the activities of endogenous antioxidant enzymes (superoxide dismutase, catalase, and glutathione peroxidase), and decreased malondialdehyde (MDA) levels. These results indicate that PITT exhibits notable antioxidant activity and may serve as a potential natural antioxidant source for further development. However, further studies are required to elucidate the underlying mechanisms.

Polysaccharides serve as the main bioactive compounds of Zingiber striolatum (Z. striolatum). However, their structures and functions require further research. The present work used response surface methodology (RSM) for optimizing polysaccharide extraction conditions from Z. striolatum through ultrasonic-assisted hot-water extraction and evaluating the antioxidant properties of Z. striolatum polysaccharides. According to our findings, optimal Z. striolatum polysaccharide extraction conditions included ultrasonic power of 200 W, extraction temperature of 79 °C, extraction duration of 2.5 h, and ultrasonic time of 20 min, with the extraction yield reached 19.96% ± 0.18%. The molecular weight (MW) of the purified polysaccharide ZS-P1-1 isolated from Z. striolatum was 5.63 × 10⁴ kDa, mainly composed of galactose (Gal), galacturonic acid (GalA) and glucuronic acid (GlcA) in a 0.453:0.162:0.114 molar ratio. Typically, 2,2-diphenyl-1-picrylhydrazyl radical (DPPH·) and hydroxyl radical (·OH) scavenging capacities and total reducing ability reached 30.49% ± 1.82%, 28.51% ± 1.40% and 0.64 ± 0.07 of ZS-P1-1 at 0.5 mg/mL, respectively. Moreover, ZS-P1-1 increased the reduced glutathione (GSH) level, enhanced the total superoxide dismutase (T-SOD), reduced the malondialdehyde (MDA) level, and alleviated the liver and kidney damage caused by oxidative stress in mice. Our results suggest that ZS-P1-1 shows excellent antioxidant properties and provides a certain theoretical foundation for developing and utilizing Z. striolatum polysaccharides.

Gut microbiota dysbiosis has been reported as a risk factor in the development of type 2 diabetes mellitus (T2DM). Polysaccharides from Phellinus igniarius (P. igniarius) possess various properties that help manage metabolic diseases; however, their underlying mechanism of action remains unclear. Therefore, in this study, we aimed to evaluate the effect of P. igniarius polysaccharides (SH-P) on improving hyperglycemia in mice with T2DM and clarified its association with the modulation of gut microbiota and their metabolites using 16S rDNA sequencing and liquid chromatography–mass spectrometry. Fecal microbiota transplantation (FMT) was used to verify the therapeutic effects of microbial remodeling. SH-P supplementation alleviated hyperglycemia symptoms in T2DM mice, ameliorated gut dysbiosis, and significantly increased the abundance of Lactobacillus in the gut. Pathway enrichment analysis indicated that SH-P treatment altered metabolic pathways associated with the occurrence and development of diabetes. Spearman’s correlation analysis revealed that changes in the dominant bacterial genera were significantly correlated with metabolite levels closely associated with hyperglycemia. Additionally, FMT significantly improved insulin sensitivity and antioxidative capacity and reduced inflammation and tissue injuries, indicating improved glucose homeostasis. These results indicate that the ameliorative effects of SH-P on hyperglycemia are associated with the modulation of gut microbiota composition and its metabolites.

The aim of this study was to investigate the aqueous two-phase extraction (ATPE), in vitro antioxidant, and in vivo renal protective effects of polysaccharides from spores of Cordyceps cicadae (CCSPs). The optimal ATPE parameters were as follows: an extraction temperature of 61 °C, an ammonium sulfate concentration of 18%, an ethanol concentration of 40%, a liquid-to-material ratio of 33 mL/g, and an extraction time of 60 min. Under these parameters, the CCSPs yield was 6.96 ± 0.11% (n = 3), which was consistent with the predicted yield (6.92%). Among the three purified polysaccharide fractions, CCSP-2 displayed stronger scavenging activities against DPPH radicals and hydroxyl radicals, reducing power and ferrous-ion-chelating ability to a greater extent than CCSP-1 and CCSP-3. CCSP-2 exhibited its protective effect in lipopolysaccharide (LPS)-induced septic acute kidney injury (AKI) mice by significantly alleviating renal edema; reducing 24 h urine protein, blood urea nitrogen (BUN), and serum creatinine (SCr); inhibiting the release of serum proinflammatory cytokines; boosting the activities of antioxidant enzymes; and reducing the levels of oxidative damage products. These results suggest that CCSP-2 exerted its protective effect against LPS-induced septic AKI in mice through anti-inflammatory and antioxidant pathways.

This study investigated the purification, preliminary structure and in vivo immunomodulatory activities of polysaccharides from the spores of Cordyceps cicadae (CCSP). The crude CCSP was purified by diethylaminoethyl (DEAE)-cellulose and Sephadex G-100 chromatography, affording CCSP-1, CCSP-2 and CCSP-3 with molecular weights of 1.79 × 10⁶, 5.74 × 10⁴ and 7.93 × 10³ Da, respectively. CCSP-2 consisted of mannose and glucose, while CCSP-1 and CCSP-3 are composed of three and four monosaccharides with different molar ratios, respectively. CCSP-2 exhibited its ameliorative effects in cyclophosphamide-induced immunosuppressed mice through significantly increasing spleen and thymus indices, enhancing macrophage phagocytic activity, stimulating splenocyte proliferation, improving natural killer (NK) cytotoxicity, improving bone marrow suppression, regulating the secretion of cytokines and immunoglobulins, and modulating antioxidant enzyme system. These results indicate that CCSP-2 might be exploited as a promising natural immunomodulator.

Akademische Vertreter der Toxikologie haben die wichtige Aufgabe, toxische Substanzen zu identifizieren. Klinische Erfahrungen und klinische Differenzierungen fehlen ihnen aber weitgehend, sodass sie in ihr Spezialgebiet hineinwachsen mit dem Denken, dass Gift immer Gift und ein Karzinogen immer karzinogen sei. Doch sogar Wasser ist toxisch, wenn es beim ungeeigneten Patienten im ungeeigneten Kontext verwendet wird (Wasserintoxikation). In der Chine sischen Medizin spielt die wirtsbe zogene Effektmodifikation eine entscheidende Rolle. Das heisst, dass die Konstitution des Patienten mitentscheidet, wie ein Mittel wirkt. Schmeiser und Cornelius scheinen hingegen ganz im Denkschema von schädlichen und unschädlichen Substanzen verhaftet zu sein, sodass sie auch den epidemiologischen Begriff der Effektmodifikation missverstehen. Das zeigt den akademischen Reduktionismus, der wissenschaftlich unzulässige Generalisierungen hervorbringt.