1.Isolation of Endophytic Fungi from Angelica sinensis and Evaluation of Their Secondary Metabolite Activities
Yujie ZHAO ; Nan WANG ; Ming HUANG ; Zongyuan WANG ; Yajuan DU ; Xiaoxiao ZHAO ; Yang LI ; Jiamei PEI ; Kailin CHEN ; Bei WANG ; Xinguo ZHANG
Chinese Journal of Information on Traditional Chinese Medicine 2024;31(4):139-145
Objective To isolate endophytic fungi from Angelica sinensis and evaluate the bioactivity of their secondary metabolites.Methods Angelica sinensis and rhizosphere soil were utilized as materials.The tissue homogenization method was employed with six diverse culture media to isolate endophytic fungi.The antibacterial activity of secondary metabolites was gauged using a 96-well plate assay,while UV spectrophotometry was used to evaluate the inhibitory activity of four enzymes.Results A total of 153 fungal strains were isolated and purified from Angelica sinensis roots,stems,leaves,and soil.The samples exhibited specific inhibitory activities against adenosine deaminase(ADA),β-lactamase,xanthine oxidase(XO),and tyrosinase(TYR),with rates of 45.83%,52.78%,51.39%and 55.56%,respectively.Furthermore,1.39%of the samples displayed wide-ranging inhibitory effects against four indicator bacteria.Strain 6B also showcased the lowest inhibitory concentration values of 62.5 and 7.81 μg/mL against Escherichia coli ATCC25922 and ATCC35218,respectively,signifying its potential research significance.Conclusion Angelica sinensis has abundant endophytic fungal resources and is a good source for discovering active compounds,demonstrating certain research value.
2.Isolation of Endophytic Fungi from Glycyrrhiza glabra L.and Study of Their Secondary Metabolite Activity
Yang LI ; Zhipeng JIA ; Yujie ZHAO ; Xiaoxiao ZHAO ; Jiamei PEI ; Kailin CHEN ; Zaiping FENG ; Xinguo ZHANG
World Science and Technology-Modernization of Traditional Chinese Medicine 2024;26(11):2996-3005
Objective Endophytic fungi were isolated and purified from fresh Glycyrrhiza glabra L.and strains capable of producing secondary metabolites with inhibitory effects on adenosine deaminase,β-lactamase,xanthine oxidase,and tyrosinase were screened.Methods Four types of culture media were used to isolate and purify endophytic fungi using tissue homogenization method.Subsequently,the secondary metabolites of endophytic fungi were evaluated using an activity assessment platform.Results A total of 131 strains of endophytic fungi were isolated from the plant,among which 34 strains exhibited distinct morphologies and special characteristics.The mycelial extract of hypha G(1-5)(s)showed good adenosine deaminase inhibitory activity(inhibition rate:98.58%)and β-lactamase inhibitory activity(inhibition rate:93.15%).and β-lactamase(inhibition rate:93.15%).Strain G6 exhibited excellent xanthine oxidase inhibitory activity(inhibition rate:91.38%)in the ethyl acetate phase.These strains were identified as Penicillium sp.and Aspergillus sp.Conclusion Glycyrrhiza glabra L.harbors a diverse range of endophytic fungi with promising research potential.Further investigation is warranted to provide important technical data for the protection and in-depth applications of Glycyrrhiza glabra L..
3.Isolation of Endophytic Fungi from Glycyrrhiza glabra L.and Study of Their Secondary Metabolite Activity
Yang LI ; Zhipeng JIA ; Yujie ZHAO ; Xiaoxiao ZHAO ; Jiamei PEI ; Kailin CHEN ; Zaiping FENG ; Xinguo ZHANG
World Science and Technology-Modernization of Traditional Chinese Medicine 2024;26(11):2996-3005
Objective Endophytic fungi were isolated and purified from fresh Glycyrrhiza glabra L.and strains capable of producing secondary metabolites with inhibitory effects on adenosine deaminase,β-lactamase,xanthine oxidase,and tyrosinase were screened.Methods Four types of culture media were used to isolate and purify endophytic fungi using tissue homogenization method.Subsequently,the secondary metabolites of endophytic fungi were evaluated using an activity assessment platform.Results A total of 131 strains of endophytic fungi were isolated from the plant,among which 34 strains exhibited distinct morphologies and special characteristics.The mycelial extract of hypha G(1-5)(s)showed good adenosine deaminase inhibitory activity(inhibition rate:98.58%)and β-lactamase inhibitory activity(inhibition rate:93.15%).and β-lactamase(inhibition rate:93.15%).Strain G6 exhibited excellent xanthine oxidase inhibitory activity(inhibition rate:91.38%)in the ethyl acetate phase.These strains were identified as Penicillium sp.and Aspergillus sp.Conclusion Glycyrrhiza glabra L.harbors a diverse range of endophytic fungi with promising research potential.Further investigation is warranted to provide important technical data for the protection and in-depth applications of Glycyrrhiza glabra L..
4.Targeting autophagy using small-molecule compounds to improve potential therapy of Parkinson's disease.
Kai ZHANG ; Shiou ZHU ; Jiamei LI ; Tingting JIANG ; Lu FENG ; Junping PEI ; Guan WANG ; Liang OUYANG ; Bo LIU
Acta Pharmaceutica Sinica B 2021;11(10):3015-3034
Parkinson's disease (PD), known as one of the most universal neurodegenerative diseases, is a serious threat to the health of the elderly. The current treatment has been demonstrated to relieve symptoms, and the discovery of new small-molecule compounds has been regarded as a promising strategy. Of note, the homeostasis of the autolysosome pathway (ALP) is closely associated with PD, and impaired autophagy may cause the death of neurons and thereby accelerating the progress of PD. Thus, pharmacological targeting autophagy with small-molecule compounds has been drawn a rising attention so far. In this review, we focus on summarizing several autophagy-associated targets, such as AMPK, mTORC1, ULK1, IMPase, LRRK2, beclin-1, TFEB, GCase, ERR

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