MAP Kinase Signaling System

Publication Title: 
Toxicology in vitro: an international journal published in association with BIBRA

Advanced glycation end-products (AGEs) are formed during normal aging, and at an accelerated rate in metabolic syndrome patients. Nonalcoholic steatohepatitis (NASH) can be caused by the AGEs in plasma, while glyceraldehyde-derived AGEs (glycer-AGEs) are significantly higher in the serum of NASH patients. In this study, we investigated the molecular mechanisms of chebulic acid, isolated from Terminalia chebula Retz., in the inhibition of glycer-AGEs induced production of reactive oxygen species (ROS) and collagen accumulation using the LX-2 cell line.

Author(s): 
Koo, Yun-chang
Pyo, Min Cheol
Nam, Mi-Hyun
Hong, Chung-Oui
Yang, Sung-Yong
Lee, Kwang-Won
Publication Title: 
The Biochemical Journal

The free radical theory of aging proposes that ROS (reactive oxygen species) are major driving forces of aging, and are also critically involved in cellular senescence. Besides the mitochondrial respiratory chain, alternative sources of ROS have been described that might contribute to cellular senescence. Noxs (NADPH oxidases) are well-known sources of superoxide, which contribute to the antimicrobial capabilities of macrophages, a process involving the prototypical member of the family referred to as Nox2.

Author(s): 
Lener, Barbara
Kozie?, Rafa?
Pircher, Haymo
H¸tter, Eveline
Greussing, Ruth
Herndler-Brandstetter, Dietmar
Hermann, Martin
Unterluggauer, Hermann
Jansen-D¸rr, Pidder
Publication Title: 
PloS One

Protein kinase signaling cascades control most aspects of cellular function. The ATP binding domains of signaling protein kinases are the targets of most available inhibitors. These domains are highly conserved from mammals to flies. Herein we describe screening of a library of small molecule inhibitors of protein kinases for their ability to increase Drosophila lifespan. We developed an assay system which allowed screening using the small amounts of materials normally present in commercial chemical libraries.

Author(s): 
Spindler, Stephen R.
Li, Rui
Dhahbi, Joseph M.
Yamakawa, Amy
Sauer, Frank
Publication Title: 
Aging Cell

Adenylyl cyclase type 5 knockout mice (AC5 KO) live longer and are stress resistant, similar to calorie restriction (CR). AC5 KO mice eat more, but actually weigh less and accumulate less fat compared with WT mice. CR applied to AC5 KO results in rapid decrease in body weight, metabolic deterioration, and death. These data suggest that despite restricted food intake in CR, but augmented food intake in AC5 KO, the two models affect longevity and metabolism similarly.

Author(s): 
Yan, Lin
Park, Ji Yeon
Dillinger, Jean-Guillaume
De Lorenzo, Mariana S.
Yuan, Chujun
Lai, Lo
Wang, Chunbo
Ho, David
Tian, Bin
Stanley, William C.
Auwerx, Johan
Vatner, Dorothy E.
Vatner, Stephen F.
Publication Title: 
Mini Reviews in Medicinal Chemistry

The biological activities and mechanisms of tea polyphenols and their polymerics have been attractive issues in cancer research. The inhibition of tea polyphenols on cancer cells decreased cell proliferation and increased apoptosis. Tremendous evidences have shown that tea polyphenols suppress tumor promotion by inhibiting enzyme activities and blocking signal transduction pathways. Specifically, the mitogen activated protein kinases (MAPK) pathways have been implicated as an important target molecular for cancer prevention and therapy.

Author(s): 
Li, W.
Mei, X.
Tu, Y. Y.
Publication Title: 
Acta Medica Okayama

We studied the effects of natural essential oil on neurite outgrowth in PC12m3 neuronal cells to elucidate the mechanism underlying the action of the oils used in aromatherapy. Neurite outgrowth can be induced by nerve growth factor (NGF), where ERK and p38 MAPK among MAPK pathways play important roles in activating intracellular signal transduction. In this study, we investigated whether d-limonene, the major component of essential oils from oranges, can promote neurite outgrowth in PC12m3 cells, in which neurite outgrowth can be induced by various physical stimulations.

Author(s): 
Shinomiya, Misae
Kawamura, Kenji
Tanida, Emiko
Nagoshi, Megumi
Motoda, Hirotoshi
Kasanami, Yoshiko
Hiragami, Fukumi
Kano, Yoshio
Publication Title: 
Carcinogenesis

Guggulsterone (GUG), a resin of the Commiphora mukul tree, has been used in ayurvedic medicine for centuries to treat a variety of ailments. Recent studies have suggested that GUG may also possess anticancer effects. In the present study, we show that GUG possesses antitumor-promoting effects in SENCAR mouse skin tumorigenesis model. We first determined the effect of topical application of GUG to mice against 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced conventional markers and other novel markers of skin tumor promotion.

Author(s): 
Sarfaraz, Sami
Siddiqui, Imtiaz A.
Syed, Deeba N.
Afaq, Farrukh
Mukhtar, Hasan
Publication Title: 
PloS One

BACKGROUND AND AIMS: Free radicals are implicated in the aetiology of some gastrointestinal disorders such as gastric ulcer, colorectal cancer and inflammatory bowel disease. In the present study we investigated the antioxidant and genoprotective activity of some rotenoids (i.e. boeravinones) isolated from the roots of Boerhaavia diffusa, a plant used in the Ayurvedic medicine for the treatment of diseases affecting the gastrointestinal tract.

Author(s): 
Aviello, Gabriella
Canadanovic-Brunet, Jasna M.
Milic, Natasa
Capasso, Raffaele
Fattorusso, Ernesto
Taglialatela-Scafati, Orazio
Fasolino, Ines
Izzo, Angelo A.
Borrelli, Francesca
Publication Title: 
Carcinogenesis

Guggulsterone (GUG), a resin of the Commiphora mukul tree, has been used in ayurvedic medicine for centuries to treat a variety of ailments. Recent studies have suggested that GUG may also possess anticancer effects. In the present study, we show that GUG possesses antitumor-promoting effects in SENCAR mouse skin tumorigenesis model. We first determined the effect of topical application of GUG to mice against 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced conventional markers and other novel markers of skin tumor promotion.

Author(s): 
Sarfaraz, Sami
Siddiqui, Imtiaz A.
Syed, Deeba N.
Afaq, Farrukh
Mukhtar, Hasan
Publication Title: 
Indian Journal of Experimental Biology

Immunostimulatory activity of AC II, a registered ayurvedic preparation prepared at Amala Ayurvedic Research Centre for treating HIV and AIDS is reported. AC II administration could significantly enhance the mitogen-induced proliferation of lymphocytes of spleen cells. It was also found to increase cell-mediated immune responses in normal and tumor-bearing control animals. Oral administration of AC II significantly enhanced Natural Killer cell activity in normal and tumor-bearing animals on the 7th day, which was observed earlier than the tumor-bearing control animals and normal animals.

Author(s): 
Tharakan, Sheeja T.
Kuttan, Girija
Kuttan, Ramadasan
Kesavan, M.
Austin, null
Rajagopalan, K.

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