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Planta Med 2012; 78(17): 1813-1823
DOI: 10.1055/s-0032-1315397
Biological and Pharmacological Activity
Original Papers
Georg Thieme Verlag KG Stuttgart · New York

Antrodia cinnamomea Exhibits a Potent Neuroprotective Effect in the PC12 Cell-Aβ 25–35 Model – Pharmacologically through Adenosine Receptors and Mitochondrial Pathway

Chi-Huang Chang
1   Research Institute of Biotechnology, Hungkuang University, New Taichung City, Taiwan
,
Hui-Er Wang
2   Institute of Food Science and Applied Technology, Hungkuang University, New Taichung City, Taiwan
,
Pei-Yu Liaw
1   Research Institute of Biotechnology, Hungkuang University, New Taichung City, Taiwan
,
Chiung-Chi Peng
3   Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
,
Robert Y. Peng
1   Research Institute of Biotechnology, Hungkuang University, New Taichung City, Taiwan
› Author Affiliations
Further Information

Publication History

received 17 April 2012
revised 25 August 2012

accepted 31 August 2012

Publication Date:
11 October 2012 (online)

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Abstract

Antrodia cinnamomea has a diversity of therapeutic effects including anticancer properties. Its neuroprotective effect is rarely cited. We hypothesized that due to its high phenol, triterpenoid, and adenosine contents, it might exhibit a potent neuroprotective effect. The PC12 cell model was used to investigate its pharmaceutical effects. Congo red staining was used to identify the activation of Aβ 25–35. Chemical analysis indicated that the ethanolic extract of Antrodia cinnamomea contained a huge amount (mg/g ethanolic extract of Antrodia cinnamomea) of polyphenolics (133 ± 7), flavonoids (114 ± 6), triterpenoids (175 ± 26), and adenosine (370 ± 17). When tested with Aβ 25–35 (15 µM), the cell viability was suppressed in a dose-dependent fashion with an IC50 value of 10 µM. The biochemical parameters upregulated by Aβ 25–35 (15 µM) involved TNF-α, ROS, MDA, NO, and the intracellular calcium ions. These adverse effects were effectively ameliorated by the ethanolic extract of Antrodia cinnamomea (1 µg/mL). The Western blot analysis revealed that Aβ 25–35 downregulated BcL-2/Bax and upregulated cleaved caspases-9 and − 3 without affecting cleaved caspase-8. The G2/M arrest elicited by Aβ 25–35 was ameliorated by the ethanolic extract of Antrodia cinnamomea. TUNEL assay confirmed the apoptosis, and the ethanolic extract of Antrodia cinnamomea downregulated adenosine A1 and adenosine A2A receptors. Taken together, Aβ 25–35 tends to induce neurotoxicity on PC12 cells. The ethanolic extract of Antrodia cinnamomea is capable of suppressing its neurotoxicity by rescuing the mitochondrial apoptosis pathway and simultaneously by downregulating adenosine A1 and adenosine A2A receptors to retard neurodegeneration and memory dysfunction.

Key words

Antrodia cinnamomea - Fomitopsidaceae - apoptosis - adenosine receptor - neuroprotective - Aβ 25–35

Supporting Information

 

  • References

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