ProHealth health Vitamin and Natural Supplement Store and Health
Home  |  Log In  |  My Account  |  View Cart  View Your ProHealth Vitamin and Supplement Shopping Cart
800-366-6056  |  Contact Us  |  Help
Facebook Google Plus
Fibromyalgia  Chronic Fatigue Syndrome & M.E.  Lyme Disease  Natural Wellness  Supplement News  Forums  Our Story
Store     Brands   |   A-Z Index   |   Best Sellers   |   New Products   |   Deals & Specials   |   Under $10   |   SmartSavings Club

Trending News

On-and-off fasting helps fight obesity, study finds

16 Tips from 16 Years Sick

Fibromyalgia Fare Fit for All Seasons

New Study Shows Artificial Sweeteners Lead to Diabetes

Essential Oils — An Effective and Healthy Option to Treat Headaches

Higher vitamin D levels associated with less severe disease in NAFLD patients

Can Pomegranates Slow Aging?

Krill Oil: Make This Omega-3 Supplement Part of Your Health Regimen

How zinc helps fight esophageal cancer

What Benefits Can You Get From High-Quality Whey Protein?

 
Print Page
Email Article

Activation of the L voltage-sensitive calcium channel by mitogen-activated protein (MAP) kinase following exposure of neuronal cells to beta-amyloid. Map kinase mediates beta-amyloid-induced neurodegeneration.

  [ 35 votes ]   [ Discuss This Article ]
By Ekinci FJ, Malik KU, Shea TB • www.ProHealth.com • October 15, 1999


Neuronal degeneration in Alzheimer's disease (AD) has been variously attributed to increases in cytosolic calcium, reactive oxygen species, and phosphorylated forms of the microtubule-associated protein tau.

Beta-Amyloid (betaA), which accumulates extracellularly in AD brain, induces calcium influx in culture via the L voltage-sensitive calcium channel. Since this channel is normally activated by protein kinase A-mediated phosphorylation, we examined kinase activities recruited following betaA treatment of cortical neurons and SH-SY-5Y neuroblastoma. betaA increased channel phosphorylation; this increase was unaffected by the protein kinase A inhibitor H89 but was reduced by the mitogen-activated protein (MAP) kinase inhibitor PD98059.

Pharmacological and antisense oligonucleotide-mediated reduction of MAP kinase activity also reduced betaA-induced accumulation of calcium, reactive oxygen species, phospho-tau immunoreactivity, and apoptosis. These findings indicate that MAP kinase mediates multiple aspects of betaA-induced neurotoxicity and indicates that calcium influx initiates neurodegeneration in AD. betaA increased MAP kinase-mediated phosphorylation of membrane-associated proteins and reduced phosphorylation of cytosolic proteins without increasing overall MAP kinase activity. Increasing MAP kinase activity with epidermal growth factor did not increase channel phosphorylation.

These findings indicate that redirection, rather than increased activation, of MAP kinase activity mediates betaA-induced neurotoxicity.

Source: J Biol Chem 1999 Oct 15;274(42):30322-7
PMID: 10514528, UI: 99445602

(Center for Cellular Neurobiology and Neurodegeneration Research, Department of Biological Sciences, University of Massachusetts, Lowell, Massachusetts 01854, USA.)







Post a Comment

Featured Products From the ProHealth Store
Ultra EPA  - Fish Oil Ultra ATP+, Double Strength Energy NADH™ 12.5mg


Article Comments



Be the first to comment on this article!

Post a Comment


 
Optimized Curcumin Longvida with Omega-3

Featured Products

Optimized Curcumin Longvida® Optimized Curcumin Longvida®
Supports Cognition, Memory & Overall Health
Ultra ATP+, Double Strength Ultra ATP+, Double Strength
Get energized with malic acid & magnesium
Vitamin D3 Extreme™ Vitamin D3 Extreme™
50,000 IU Vitamin D3 - Prescription Strength
Ultra EPA  - Fish Oil Ultra EPA - Fish Oil
Ultra concentrated source of essential fish oils

Natural Remedies

Dreaming of a Good Night's Sleep? Dreaming of a Good Night's Sleep?
The Curcumin Revolution: 'Golden' Ticket to Better Health The Curcumin Revolution: 'Golden' Ticket to Better Health
"It's Not Easy Being Green" - But It Is Healthy
Fight Inflammation and Promote Cognitive Health with High-OPC Grape Seed Fight Inflammation and Promote Cognitive Health with High-OPC Grape Seed
Research Links Green Tea to Weight Loss Research Links Green Tea to Weight Loss

CONTACT US
ProHealth, Inc.
555 Maple Ave
Carpinteria, CA 93013
(800) 366-6056  |  Email

· Become a Wholesaler
· Vendor Inquiries
· Affiliate Program
SHOP WITH CONFIDENCE
Credit Card Processing
SUBSCRIBE TO OUR NEWSLETTERS
Get the latest news about Fibromyalgia, M.E/Chronic Fatigue Syndrome, Lyme Disease and Natural Wellness

CONNECT WITH US ProHealth on Facebook  ProHealth on Twitter  ProHealth on Pinterest  ProHealth on Google Plus

© 2017 ProHealth, Inc. All rights reserved. Pain Tracker App  |  Store  |  Customer Service  |  Guarantee  |  Privacy  |  Contact Us  |  Library  |  RSS  |  Site Map