Navigation Links
Low-protein diet slows Alzheimer's in mice
Date:2/14/2013

Mice with many of the pathologies of Alzheimer's Disease showed fewer signs of the disease when given a protein-restricted diet supplemented with specific amino acids every other week for four months.

Mice at advanced stages of the disease were put on the new diet. They showed improved cognitive abilities over their non-dieting peers when their memory was tested using mazes. In addition, fewer of their neurons contained abnormal levels of a damaged protein, called "tau," which accumulates in the brains of Alzheimer's patients.

Dietary protein is the major dietary regulator of a growth hormone known as IGF-1, which has been associated with aging and diseases in mice and several diseases in older adults.

Upcoming studies by USC Professor Valter Longo, the study's corresponding author, will attempt to determine whether humans respond similarly while simultaneously examining the effects of dietary restrictions on cancer, diabetes and cardiac disease.

"We had previously shown that humans deficient in Growth Hormone receptor and IGF-I displayed reduced incidence of cancer and diabetes. Although the new study is in mice, it raises the possibility that low protein intake and low IGF-I may also protect from age-dependent neurodegeneration," said Longo, who directs the Longevity Institute of the USC Davis School of Gerontology and has a joint appointment the USC Dornsife College of Letters, Arts and Sciences.

Longo worked with Pinchas Cohen, dean of the USC Davis School, as well as USC graduate students Edoardo Parrella, Tom Maxim, Lu Zhang, Junxiang Wan and Min Wei; Francesca Maialetti of the Istituto Superiore di Sanit in Rome; and Luigi Fontana of Washington University in St. Louis.

"Alzheimer's Disease and other forms of neurodegeneration are a major burden on society, and it is a rising priority for this nation to develop new approaches for preventing and treating these conditions, since the frequencies of these disorders will be rising as the population ages over the next several decades," said Cohen, who became dean of the School of Gerontology in summer 2012. "New strategies to address this, particularly non-invasive, non-pharmacological approaches such as tested in Dr. Longo's study are particularly exciting."

The results of their study were published online by Aging Cell last month.

The team found that a protein-restricted diet reduced levels of IGF-1 circulating through the body by 30 to 70 percent, and caused an eight-fold increase in a protein that blocks IGF-1's effects by binding to it.

IGF-1 helps the body grow during youth but is also associated with several diseases later in life in both mice and humans. Exploring dietary solutions to those diseases as opposed to generating pharmaceuticals to manipulate IGF-1 directly allows Longo's team to make strides that could help sufferers today or in the next few years.

"We always try to do things for people who have the problem now," Longo said. "Developing a drug can take 15 years of trials and a billion dollars.

"Although only clinical trials can determine whether the protein-restricted diet is effective and safe in humans with cognitive impairment, a doctor could read this study today and, if his or her patient did not have any other viable options, could consider introducing the protein restriction cycles in the treatment understanding that effective interventions in mice may not translate into effective human therapies," he said.

Many elderly individuals may have already be frail, have lost weight or may not be healthy enough to eat a protein-restricted diet every other week. Longo strongly insisted that any dieting be monitored by a doctor or registered dietician to make sure that patients do not become amino acid deficient, lose additional weight or develop other side effects.


'/>"/>

Contact: Robert Perkins
perkinsr@usc.edu
213-740-9226
University of Southern California
Source:Eurekalert

Related medicine news :

1. Oxygen Therapy Slows Type 1 Diabetes in Mice, Study Says
2. Infection With 2 HIV Strains Slows Disease Progression
3. Mild HIV type slows development of AIDS and makes new preventive treatments possible
4. Mesothelioma drug slows disease progression in patients with an inactive NF2 gene
5. Active lifestyle boosts brain structure and slows Alzheimer’s disease
6. Newly approved oral medication slows rheumatoid arthritis joint damage
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... ... June 23, 2017 , ... Everybody has their own ... others prefer to read it, and some people don't like it at all. FindaTopDoc ... what they found: , Erotic literature can give readers a taste of their deepest, ...
(Date:6/23/2017)... ... June 23, 2017 , ... Ensuring meat products have ... highlight the importance of correctly using a meat thermometer. The videos feature University ... research on consumer food safety habits. Dr. Bruhn explains the variety of meat ...
(Date:6/23/2017)... West Palm Beach, FL (PRWEB) , ... June 23, 2017 , ... ... June 19, in Pinecrest, Florida. This is MD Now’s 28th facility overall and marks ... 12301 S. Dixie Highway, located one mile North of The Falls shopping mall. The ...
(Date:6/23/2017)... (PRWEB) , ... June 23, 2017 , ... American Farmer, ... winning series, which is slated to air fourth quarter 2017. American Farmer airs Tuesdays ... Hansen, a Danish pharmacist, founded Chr. Hansen in Denmark in 1874 after a ...
(Date:6/23/2017)... ... 23, 2017 , ... Jusino Insurance Services, a locally owned ... greater Chicago metropolitan area, is embarking on a charity drive in conjunction with ... Founded in 1897, Hephzibah Children’s Association is one of the oldest social services ...
Breaking Medicine News(10 mins):
(Date:6/2/2017)...  NxStage Medical, Inc. (Nasdaq:  NXTM), a leading medical technology company ... demonstrating positive biochemical outcomes related to more frequent hemodialysis ... will be presented at the ERA-EDTA Congress being held ... . The research was conducted by ... Europe (KIHDNEy) Cohort team ...
(Date:5/30/2017)... TEL AVIV, Israel , May 30, 2017 /PRNewswire/ ... clinical stage pharmaceutical Company specializing in the development ... management will present a company overview at three ... The 7th Annual LD Micro Invitational: ... Date:                     ...
(Date:5/24/2017)... 2017  ivWatch LLC today announced the launch ... to enable seamless integration of ivWatch,s groundbreaking IV ... pumps and other devices. By integrating ivWatch technology ... help health care customers deliver a higher level ... IV therapy. "The ivWatch OEM Board ...
Breaking Medicine Technology: