Novel Antioxidants and α-Glycosidase and Protein Tyrosine Phosphatase 1B Inhibitors from an Endophytic Fungus Penicillium brefeldianum F4a
Abstract
:1. Introduction
2. Materials and Methods
2.1. General Experimental Procedures
2.2. Fungal Material
2.3. Fermentation and Extraction
2.4. Bioactivity-Guided Isolation
2.5. Spectral Data
2.6. ECD Calculations
2.7. Antioxidant Assay
2.7.1. DPPH Radical Scavenging Assay
2.7.2. ABTS Radical Scavenging Assay
2.8. Antidiabetic Assay In Vitro
2.8.1. α-Glycosidase Inhibitory Assay
2.8.2. PTP1B Inhibitory Assay
3. Results and Discussion
3.1. Bioactivity-Guided Compound Isolation
3.2. Structure Elucidation
3.3. Antioxidant Activities
3.4. α-Glycosidase and PTP1B Inhibition Activities
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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Position | 1 | 2 | 3 | |||
---|---|---|---|---|---|---|
δH | δC | δH | δC | δH | δC | |
1 | 209.0, C | |||||
2 | 164.6, C | 164.7, C | 6.17, d, (5.6) | 132.5, CH | ||
3 | 100.9, C | 100.5, C | 7.76, d, (5.6) | 158.6, CH | ||
4 | 5.92, s | 100.8, CH | 5.89, s | 100.0, CH | 150.8, C | |
5 | 160.4, C | 159.3, C | 55.7, C | |||
1′ | 116.9, C | 116.9, C | 114.6, C | |||
2′ | 158.6, C | 158.6, C | 158.8, C | |||
3′ | 6.14, d, (2.1) | 96.8, CH | 6.14, d, (1.8) | 96.7, CH | 6.09, d, (2.2) | 96.3, CH |
4′ | 155.7, C | 155.7, C | 156.2, C | |||
5′ | 6.09, d, (2.1) | 108.9, CH | 6.09, d, (1.8) | 108.9, CH | 6.08, d, (2.2) | 108.9, CH |
6′ | 138.1, C | 138.1, C | 138.4, C | |||
7′ | 3.45, s | 19.6, CH2 | 3.45, s | 19.5, CH2 | 2.65, d, (14.0) 2.55, d, (14.0) | 28.8, CH2 |
8′ | 2.16, s | 19.9, CH3 | 2.16, s | 19.9, CH3 | 2.01, s | 20.4, CH3 |
9′ | 3.60, s | 55.3, OCH3 | 3.60, s | 55.3, OCH3 | 3.52, s | 54.4, OCH3 |
10′ | 10.76, s | 164.3, C | 10.74, s | 164.2, C | 5.23, s 4.96, s | 111.9, CH2 |
11′ | 2.39, m | 42.7, CH2 | 2.09, s | 19.2, CH3 | 3.63, d, (10.3) 3.55, d, (10.3) | 64.7, CH2 |
12′ | 3.86, m | 64.0, CH | ||||
13′ | 1.06, d, (6.2) | 23.4, CH3 |
Compd. | α-Glycosidase Inhibitory Assay | PTP1B Inhibitory Assay | DPPH• Assay | ABTS•+ Assay |
---|---|---|---|---|
EC50 (μM) a | EC50 (μM) a | EC50 (μM) a | EC50 (μM) a | |
1 | >50 | >50 | >100 | 21.93 ± 1.06 |
2 | >50 | >50 | >100 | 28.20 ± 2.87 |
3 | 38.93 ± 4.90 | >50 | >100 | 32.67 ± 3.86 |
4 | >50 | >50 | >100 | 14.54 ± 0.46 |
5 | >50 | >50 | 28.42 ± 3.16 | 7.61 ± 0.46 |
6 | >50 | >50 | 30.07 ± 2.83 | 14.96 ± 2.57 |
7 | >50 | 8.87 ± 0.91 | >100 | >100 |
8 | >50 | 11.68 ± 1.03 | >100 | 21.48 ± 0.88 |
9 | >50 | >50 | >100 | 30.02 ± 4.17 |
Acarbose | 2.62 ± 0.06 | ND | ND | ND |
Na3VO4 | ND | 2.38 ± 0.07 | ND | ND |
L-Ascorbic acid | ND | ND | 6.12 ± 0.17 | 18.81 ± 3.39 |
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Bai, Y.; Yi, P.; Zhang, S.; Hu, J.; Pan, H. Novel Antioxidants and α-Glycosidase and Protein Tyrosine Phosphatase 1B Inhibitors from an Endophytic Fungus Penicillium brefeldianum F4a. J. Fungi 2021, 7, 913. https://doi.org/10.3390/jof7110913
Bai Y, Yi P, Zhang S, Hu J, Pan H. Novel Antioxidants and α-Glycosidase and Protein Tyrosine Phosphatase 1B Inhibitors from an Endophytic Fungus Penicillium brefeldianum F4a. Journal of Fungi. 2021; 7(11):913. https://doi.org/10.3390/jof7110913
Chicago/Turabian StyleBai, Yan, Ping Yi, Songya Zhang, Jiangchun Hu, and Huaqi Pan. 2021. "Novel Antioxidants and α-Glycosidase and Protein Tyrosine Phosphatase 1B Inhibitors from an Endophytic Fungus Penicillium brefeldianum F4a" Journal of Fungi 7, no. 11: 913. https://doi.org/10.3390/jof7110913