Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Leptin regulates the immune response to friend and foe

16.01.2003


The hormone leptin, primarily produced in fat cells, helps regulate food intake, metabolism and reproduction. It has also been shown to promote and sustain the bodys immune response by binding to T lymphocytes - the frontline cells that protect against infection.



The disease experimental autoimmune encephalomyelitis (EAE) in mice is currently used by researchers as a model of human multiple sclerosis (MS). The disease is characterized by the production of autoreactive T lymphocytes that turn against the body and attack cells within the brain and spinal cord, first inducing weight loss and ultimately resulting in paralysis.

In the January 15 issue of the Journal of Clinical Investigation, Giuseppe Matarese and colleagues at IEOS-CNR at Università di Napoli "Federico II", Napoli, Italy report that just prior to developing the clinical symptoms of EAE, mice experience a significant burst of leptin which correlates with a reduction in food intake and weight loss. Furthermore, subjecting mice to acute starvation, which prevents the production of leptin, was found to delay the onset and reduce the severity of disease. In addition, leptin secretion from T lymphocytes was found to further contribute to overall leptin production during EAE.


"Once again we witness the remarkable choreography of molecules related to body weight and energy metabolism and the parallel roles of these same molecules in the finely tuned immune response" stated Dr. Lawrence Steinman and colleagues at Stanford University, California in their accompanying commentary. They go on to say that "these results imply that in autoimmunity, stress may be beneficial, and that short-term starvation may help reverse disease". Stress is detrimental and eating is recommended when fighting bacterial infections, however it appears that in the case of autoimmunity, the opposite holds true - stress and fasting is helpful.

These results suggest that leptin actively contributes to the pathogenesis of EAE, influencing both its onset and clinical severity. Interestingly, leptin is produced at much higher levels in females than males, which may account for the higher susceptibility of females to autoimmune diseases, a fact that has long puzzled scientists. The authors suggest that modulating leptin concentration through dietary approaches, and/or the administration of drugs that interfere with the bodys own production of leptin, may have potential utility in the treatment of MS and other autoimmune diseases.


###
CONTACT:
Giuseppe Matarese
Gruppo di ImmunoEndocrinologia
Instituto di Endocrinologia e Oncologia Sperimentale
Consiglio Nazionale delle Richerche (IEOS-CNR) and Cattedra di Immunologia
Dipartmento di Biologia e Patologia Cellulare e Molecolare
Università di Napoli "Federico II", via S. Pansini 5 - 80131
Napoli
ITALY
Phone: +39-081-7463311
Fax: +39-081-7463252
E-mail: gmatarese@napoli.com

View the PDF of this article at: https://www.the-jci.org/press/16721.pdf

ACCOMPANYING COMMENTARY:
The intricate interplay among body weight, stress, and the immune response to friend or foe

CONTACT:
Lawrence Steinman
Interdepartmental Program in Immunology and the
Department of Neurological Sciences Stanford University
B002 Beckman Center for Molecular medicine
Stanford, CA 94205
USA
Phone: (650) 725-6401
Fax: (650) 725-0627
E-mail: steinman@standford.edu

View the PDF of this commentary at: https://www.the-jci.org/press/17622.pdf


Brooke Grindlinger, PhD | EurekAlert!
Further information:
http://www.the-jci.org/press/16721.pdf
http://www.the-jci.org/press/17622.pdf

More articles from Health and Medicine:

nachricht Light beam replaces blood test during heart surgery
28.02.2017 | University of Central Florida

nachricht Cells adapt ultra-rapidly to zero gravity
28.02.2017 | Universität Zürich

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Safe glide at total engine failure with ELA-inside

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded after a glide flight with an Airbus A320 in ditching on the Hudson River. All 155 people on board were saved.

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded...

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Existence of a new quasiparticle demonstrated

28.02.2017 | Materials Sciences

Sustainable ceramics without a kiln

28.02.2017 | Materials Sciences

Biofuel produced by microalgae

28.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>