Guangqing Xia

Prof. Dr. Guangqing Xia


Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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25 August 2023 in Molecules
Verified
Journal Article
Open access
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JFJiaxin Feng
Jiaxin Feng
YSYue Sun
Yue Sun
ZWZhongbao Wei
Zhongbao Wei
SHsun hui
sun hui
LLLi Li
Li Li
HZHao Zang
Hao Zang
Laportea bulbifera (Sieb. et Zucc.) Wedd., a plant with a long history of medicinal use, possesses uncertainly defined medicament portions while its antioxidant capacity remains largely unexplored. To gain a better understanding of its medicinal value, this study focused on investigating the Laportea bulbifera aboveground part (LBAP) and the Laportea bulbifera root (LBR). Through an assessment of the bioactive compound content, a significant finding emerged: the LBR exhibited notably higher levels of these bioactive phytochemicals compared to the LBAP. This observation was further reinforced by the antioxidant assays, which demonstrated the superiority of the LBR’s antioxidant capacity. The experimental results unequivocally indicate that the root is the optimal medicament portion for Laportea bulbifera. Furthermore, it was discovered that the presence of alcohol in the extraction solvent significantly enhanced the extraction of active ingredients, with the methanol extract of LBR performing the best among the extracts tested. Consequently, this extract was selected for further research. Leveraging cutting-edge UHPLC-ESI-Q-TOF-MS technology, the methanol extract of LBR was meticulously analyzed, revealing the presence of 41 compounds, primarily belonging to the phenolics and fatty acids. Remarkably, stability experiments demonstrated that the phenolics in the methanol extract maintained their stability across various pH values and during in vitro simulations of the human digestive system, albeit showing gradual degradation under high temperatures. Furthermore, the oxidative stability tests conducted on oils revealed the potential of the methanol extract as a stabilizer for olive oil and sunflower oil. Moreover, oral acute toxicity studies confirmed the low toxicity of the methanol extract, further supporting its safe use for medicinal purposes. Of particular note, histopathological examination and biochemical analysis affirmed the remarkable protective effects of the methanol extract against d-galactosamine-induced liver damage. These findings underscore the therapeutic potential of the methanol extract from the LBR in the treatment of diseases associated with oxidative imbalance.

27 September 2024 in Molecules
Verified
Journal Article
Open access
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SSShuang Sun
Shuang Sun
GXGuangqing Xia
Guangqing Xia
HPHao Pang
Hao Pang
JZJunyi Zhu
Junyi Zhu
LLLi Li
Li Li
HZHao Zang
Hao Zang
Anemone baicalensis Turcz., a botanical species with a rich historical background in traditional medicine for detoxification and insecticidal applications, possesses a vast, yet largely unexplored, therapeutic potential. This study primarily focused on conducting a qualitative phytochemical analysis of the plant, determining the active ingredient content and antioxidant activity of various solvent extracts. The qualitative phytochemical analysis revealed the presence of 12 different types of phytochemicals within the plant. Utilizing ultraviolet-visible spectrophotometry, we identified 11 active ingredients in 4 solvent extracts. Notably, the methanol extract was found to contain high concentrations of total carbohydrate, total monoterpenoid, total phenolic, total tannin, and total triterpenoid. In the antioxidant experiment, the methanol extract demonstrated superior scavenging abilities against 1,1-diphenyl-2-picrylhydrazyl radical, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonicacid) diammonium salt, superoxide anion radical, and hydrogen peroxide, outperforming other extracts in chelation experiments aimed at reducing iron and metal ions. Consequently, the methanol extract was selected for further investigation. Subsequent ultrahigh-performance liquid chromatography-electrospray ionization-quadrupole-time of flight-mass spectrometry analysis revealed that the methanol extract contained 39 compounds, primarily phenolic compounds and triterpenoid saponins. Three stability assessments confirmed the extract’s stability under high temperatures, varying pH levels, and simulated gastrointestinal processes. Additionally, oil stability testing demonstrated its antioxidant capacity in extra virgin olive oil and cold-pressed sunflower seed oil media. An oral acute toxicity experiment conducted on mice not only confirmed the absence of acute toxicity in the methanol extract but also provided a dose reference for subsequent gastric protection experiments. Notably, the methanol extract exhibited significant gastroprotective effects against ethanol-induced gastric lesions in rats, as evidenced by histopathological and biochemical analyses. Specifically, the extract reduced levels of malondialdehyde, alanine aminotransferase, and aspartate aminotransferase while increasing glutathione, nitric oxide, and catalase, indicating its gastroprotective mechanism. These findings suggest that the methanol extract from the aerial part of Anemone baicalensis could be a promising therapeutic agent for conditions associated with oxidative imbalances. They underscore the plant’s potential therapeutic benefits and offer valuable insights into its antioxidant properties, thereby broadening our understanding of its medicinal potential.
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20 December 2023 in Molecules
Verified
Journal Article
Open access
PDF file
JFJiaxin Feng
Jiaxin Feng
GXGuangqing Xia
Guangqing Xia
JZJunyi Zhu
Junyi Zhu
LLLi Li
Li Li
HZHao Zang
Hao Zang
Laportea bulbifera (Sieb. et Zucc.) Wedd. (L. bulbifera) is a significant plant in the Laportea genus. Traditionally, it has been used in ethnomedicine for treating various conditions such as rheumatic arthralgia, fractures, falling injuries, nephritis dropsy, limb numbness, pruritus, fatigue-induced internal imbalances, and irregular menstruation. Modern pharmacological studies have confirmed its therapeutic potential, including anti-inflammatory, immunosuppressive, analgesic, and anti-rheumatoid arthritis properties. To gather comprehensive information on L. bulbifera, a thorough literature search was conducted using databases like Web of Science, PubMed, ProQuest, and CNKI. This review aims to provide a comprehensive understanding of L. bulbifera, covering various aspects such as ethnomedicinal uses, geographical distribution, botanical description, phytochemistry, pharmacology, and quality control. The goal is to establish a solid foundation and propose new research avenues for exploring and developing potential applications of L. bulbifera. So far, a total of one hundred and eighty-nine compounds have been isolated and identified from L. bulbifera, including flavonoids, phenolics, nitrogen compounds, steroids, terpenoids, coumarins, phenylpropanoids, fatty acids and their derivatives, and other compounds. Notably, flavonoids and fatty acids have demonstrated remarkable antioxidant and anti-inflammatory properties. Additionally, these compounds show promising potential in activities such as analgesia, hypoglycemia, and hypolipidemia, as well as toxicity. Despite extensive fundamental studies on L. bulbifera, further research is still needed to enhance our understanding of its mechanism of action and improve quality control. This requires more comprehensive investigations to explore the specific material basis, uncover new mechanisms of action, and refine quality control methods related to L. bulbifera. By doing so, we could contribute to the further development and utilization of this plant.

20 November 2023 in Preprints.org
Verified
Preprint
Open access
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JFJiaxin Feng
Jiaxin Feng
GXGuangqing Xia
Guangqing Xia
JZJunyi Zhu
Junyi Zhu
LLLi Li
Li Li
HZHao Zang
Hao Zang
Laportea bulbifera (Sieb. et Zucc.) Wedd. (L. bulbifera) is a significant plant belonging to the Laportea genus. It has been traditionally used in ethnomedicine to treat various conditions such as rheumatic arthralgia, fractures, falling injuries, nephritis dropsy, limb numbness, pruritus, fatigue-induced internal imbalances, and irregular menstruation. Modern pharmacological studies have confirmed its therapeutic potential, as it exhibits anti-inflammatory, immunosuppressive, analgesic, and anti-rheumatoid arthritis properties. In order to gather in-depth information on L. bulbifera, a comprehensive literature search was conducted using databases such as Web of Science, PubMed, ProQuest, and CNKI. This review aims to provide a comprehensive understanding of L. bulbifera by covering various aspects, including ethnomedicinal uses, geographical distribution, botanical description, phytochemistry, pharmacology, and quality control. By doing so, this review intends to lay a strong foundation and propose new research avenues for the exploration and development of potential applications of L. bulbifera. Thus far, a total of 189 compounds have been isolated and identified from L. bulbifera. These compounds include flavonoids, phenolics, nitrogen compounds, steroids, terpenoids, coumarins, phenylpropanoids, fatty acids and their derivatives, and other compounds. Notably, flavonoids and fatty acids in L. bulbifera have demonstrated remarkable antioxidant and anti-inflammatory properties. Furthermore, these compounds show promising potential in activities such as analgesia, hypoglycemia, and hypolipidemia, as well as toxicity. Despite the extensive fundamental studies conducted on L. bulbifera, further research is still needed to enhance our understanding of its credible mechanism of action and improve its quality control. This necessitates more comprehensive investigations to explore the specific material basis, uncover new mechanisms of action, and refine the quality control methods related to L. bulbifera. By doing so, we could contribute to the further development and utilization of this plant.

8 October 2026 in Combinatorial Chemistry & High Throughput Screening
Verified
Journal Article
Closed access
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YHYuxiang Huang
Yuxiang Huang
YZYang Zhou
Yang Zhou
SGShuaijun Guo
Shuaijun Guo
CWChengsi Wu
Chengsi Wu
XSXinru Shao
Xinru Shao
GXGuangqing Xia
Guangqing Xia
Introduction: Alcohol-induced gastric injury is a common clinical problem with few good preventive options. In this study, we examined whether Xiangsha Yangwei Pills (XS), a traditional herbal formula used for digestive issues, could protect against ethanol-induced gastric damage and sought to elucidate how it might work. Methods: We combined network toxicology and network pharmacology to identify the main active compounds in XS and their potential biological targets. Two key components that emerged from this analysis, quercetin and borneol, were then examined using computational methods to predict their antioxidant activity—specifically their electron-acquisition ability and frontier orbital energy gaps. We also conducted in vitro experiments to directly test how well XS scavenges free radicals and chelates metal ions. For in vivo testing, we used a mouse model of alcohol-induced gastric injury and measured parameters such as gastric mucosal lesion severity, ulcer index scores, and total ulcer area to assess whether XS had a protective effect. Results: The network analysis identified nineteen central targets, many of which were antioxidantrelated enzymes such as superoxide dismutase, catalase, and myeloperoxidase. Our computational results suggested that the main active compounds have strong antioxidant potential, which was supported by the in vitro findings, showing that XS effectively scavenges free radicals and chelates metal ions. In the animal model, administering XS beforehand significantly reduced gastric mucosal damage, reducing both ulcer scores and the affected area by more than 80%. At the molecular level, XS treatment increased the activity of the body's own antioxidant enzymes (superoxide dismutase, catalase) and reduced tissue levels of oxidative stress markers such as malondialdehyde and myeloperoxidase. Discussion: The integration of network toxicology and pharmacology revealed 19 overlapping targets, predominantly antioxidant enzymes, suggesting that the gastroprotective effect of XS is mechanistically mediated by mitigating oxidative stress. This computational prediction was empirically validated by the observed increase in superoxide dismutase and catalase activities and the reduction in malondialdehyde and myeloperoxidase levels in vivo. Notably, the high binding affinities of core components such as quercetin and borneol to key targets (e.g., AKT1, TNF, TP53) suggest that XS may exert synergistic, multi-target modulation beyond direct radical scavenging, potentially influencing cell survival and inflammatory pathways. These findings position XS as a promising multi-component strategy for managing alcohol-induced gastric injury, bridging traditional use with modern mechanistic evidence. Conclusion: Overall, our findings show that XS offers strong protection against alcohol-induced gastric injury. The main mechanism appears to be strengthening the antioxidant defense system in the gastric mucosa. These results provide scientific support for using XS as a potential approach to help reduce alcohol- related gastric damage.

12 November 2026 in Molecules
Verified
Journal Article
Open access
PDF file
PPPeng liuzheng liuzheng Peng
Peng liuzheng liuzheng Peng
LLLi Li
Li Li
GXGuangqing Xia
Guangqing Xia
XLXuekun Liu
Xuekun Liu
HZHao Zang
Hao Zang
Hylomecon japonica (Thunb.) Prantl et Kundig (Hylomecon japonica) is a perennial medicinal herb of the family Papaveraceae whose rhizomes are widely used in traditional medicine. Fresh rhizomes are prone to rapid browning after harvest, which affects their appearance and may compromise the stability of their bioactive components; however, the enzymatic basis of this browning and the effects of drying methods on quality-related components remain largely unclear. In this study, polyphenol oxidase (PPO) and peroxidase (POD) activities were determined under different low-temperature treatments to investigate their potential roles in the enzymatic basis of browning, and the effects of eight drying methods—shade drying (SD), oven drying at 60 °C (OD-60), vacuum drying at 40 °C (VD-40), boiling followed by freezing and freeze-drying (BF-FD), direct freeze-drying (DFD), freezing at −20 °C followed by freeze-drying (F20-FD), freezing at −80 °C followed by freeze-drying (F80-FD), and soaking in 5% vitamin C solution followed by freezing at −80 °C and freeze-drying (VC-F80-FD)—on total phenolic content (TPC) and total alkaloid content (TAC) were compared. PPO activity was highest in freshly collected samples (279.28 ± 12.61 U/g) and decreased significantly with decreasing freezing temperature and prolonged freezing time, whereas POD activity was markedly activated by prolonged freezing at −20 °C. Pre-freezing at −80 °C for 24 h followed by storage at −20 °C for 72 h gave the lowest PPO activity (117.28 ± 9.04 U/g), whereas short-term freezing at −80 °C better preserved native POD activity while significantly inhibiting PPO. Among the eight drying methods, freeze-drying generally gave a higher TPC and TAC than SD, OD-60, VD-40, and BF-FD when expressed per gram of extract. DFD was the most operationally simplified freeze-drying protocol among those tested, with a high total phenolic content per gram of extract and a relatively high phenolic content per gram of dry rhizome compared with the non-freeze-drying methods; however, its alkaloid content, like that of the freeze-dried samples in general, was not higher than that of SD on a dry-weight basis. Because fresh rhizomes could not be homogenized for parallel extraction, the TPC and TAC values represent relative differences among the drying methods tested rather than absolute contents or retention rates relative to the fresh material. UHPLC-ESI-Q-TOF-MS analysis detected 75 chromatographic features, for which 84 annotations were proposed (MSI Level 2–4), including phenolics, triterpenoid saponins, alkaloids, fatty acids, and their derivatives. Comparative analysis further revealed that eight components, including hydroxytyrosol 1-O-glucoside, were absent in the shade-dried sample, consistent with visible browning during SD and with the loss of specific phenolic components and a decline in TPC. These findings clarify the enzymatic basis of browning in Hylomecon japonica rhizomes and provide a scientific basis and new ideas for the harvesting, handling, and processing of this medicinal plant resource.