Effects of Red Liriope platyphylla on NGF secretion ability, NGF receptor signaling pathway and gamma-secretase components in NSE/hAPPsw transgenic mice expressing Alzheimer's Disease.
10.5625/lar.2012.28.3.155
- Author:
Sun Il CHOI
1
;
Jun Seo GOO
;
Ji Eun KIM
;
In Sik HWANG
;
Hye Ryun LEE
;
Young Ju LEE
;
Hong Joo SON
;
Hee Seob LEE
;
Jong Sup LEE
;
Dae Youn HWANG
Author Information
1. College of Natural Resources & Life Science, Pusan National University, Miryang, Korea. dyhwang@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Red L. platyphylla;
NGF;
NGF signaling pathway;
Abeta-42;
gamma-secretase
- MeSH:
Alzheimer Disease;
Amyloid Precursor Protein Secretases;
Animals;
Asthma;
Down-Regulation;
Mice;
Mice, Transgenic;
Nerve Growth Factor;
Neurodegenerative Diseases;
Peptides;
Proteins;
Receptor, Nerve Growth Factor;
Steam;
Up-Regulation
- From:Laboratory Animal Research
2012;28(3):155-163
- CountryRepublic of Korea
- Language:English
-
Abstract:
Liriope platyphylla (LP) has long been regarded as a curative herb for the treatment of diabetes, asthma, and neurodegenerative disorders. To examine the therapeutic effects of Red LP (RLP) manufactured by steaming process on neurodegenerative disorders, significant alteration of the key factors influencing Alzheimer's Disease (AD) was detected in NSE/hAPPsw transgenic (Tg) mice after RLP treatment. The concentration of nerve growth factor (NGF) in serum increased in RLP-treated NSE/hAPPsw Tg mice compared with vehicle-treated Tg mice. However, downstream effectors of the NGF receptor signaling pathway, including TrkA and p75NTR proteins, were suppressed in RLP-treated NSE/hAPPsw Tg mice. Especially, Tg mice showed decreased levels of TrkA, p75NTR, and RhoA expression. Production of Abeta-42 peptides was lower in RLP-treated NSE/hAPPsw Tg mice than in vehicle-treated Tg mice. Further, analysis of gamma-secretase components showed that Abeta-42 peptide expression was downregulated. Of the four components, the expression of APH-1 and Nicastrin (NCT) decreased in RLP-treated NSE/hAPPsw Tg mice, whereas expression of PS-2 and Pen-2 was maintained or increased within the same group. Overall, these results suggest that RLP can help relieve neurodegenerative diseases, especially AD, through upregulation of NGF secretion ability, activation of NGF signaling pathway, downregulation of Abeta-42 peptide deposition, and alteration of gamma-secretase components.
