Navigation Links
Grafting of human spinal stem cells into ALS rats best with immunosuppressant combination
Date:12/19/2011

Tampa, Fla. (Dec, 19 2011) A team of researchers grafting human spinal stem cells into rats modeled with amyotrophic lateral sclerosis (ALS), also known as "Lou Gehrig's Disease," a degenerative, lethal, neuromuscular disease, have tested four different immunosuppressive protocols aimed at determining which regimen improved long-term therapeutic effects. Their study demonstrated that a combined, systematically delivered immunosuppression regimen of two drugs significantly improved the survival of the human spinal stem cells. Their results are published in the current issue of Cell Transplantation (20:8), now freely available on-line at http://www.ingentaconnect.com/content/cog/ct/.

"There are no therapeutic strategies that successfully modify ALS progression or outcome," said study corresponding author Dr. Michael P. Hefferan of the University of California-San Diego Neurodegeneration Laboratory. "Cell-based transplantation therapies have emerged as potential treatments for several neurological disorders, including ALS. However, cell graft survival seems to greatly depend on an accompanying immunosuppression regimen, yet there are differential responses to identical immunosuppressive therapies."

While the reason for this differential response is unclear, the study authors suggest that several mechanisms, including distinct types of acute and inflammatory responses, may be to blame.

Their study aimed at optimizing an immunosuppressive protocol for transplanting human spinal cord cells into presymptomatic ALS G93A rats with the G93A superoxide dismutase (SOD1) mutation. Two drugs, tacrolimus (FK506) and mycophenolate, were used alone and in combination.

"Although FK506 has been used successfully as monotherapy in our previous studies of spinal ischemia, it failed in the present study on ALS," explained Dr. Hefferan, who speculated that inflammation played a role in the failure. "In contrast to ALS, where spinal inflammation continues and likely worsens until endstage, the traumatically-injured spinal cord is typically characterized by an acute inflammatory phase followed by a progressive loss of most inflammatory markers."

According to the researchers, the animals receiving combined immunosuppression of both FK506 and mycophenolate likely benefited from the longer half-life of mycophenolate rather than from its action.

"The addition of mycophenolate seemed to supplement inhibition of T-cell formation and led to a robust graft survival when analyzed three weeks after grafting," concluded Dr. Hefferan.


'/>"/>

Contact: David Eve
celltransplantation@gmail.com
Cell Transplantation Center of Excellence for Aging and Brain Repair
Source:Eurekalert

Related biology news :

1. Is root grafting a positive, cooperative behavior in trees?
2. April grafting optimal for Fraser fir
3. Nitrogen from humans pollutes remote lakes for more than a century
4. Remote wilderness polluted by humans
5. 10 years after attacks on World Trade Center, human health cost is still being counted
6. Swarms of bees could unlock secrets to human brains
7. Decision making in bee swarms mimic neurons in human brains
8. Human, artificial intelligence join forces to pinpoint fossil locations
9. Predictive health symposium will focus on human microbiome
10. Finnish researchers discover regulator of human cell activity
11. Creation of the largest human-designed protein boosts protein engineering efforts
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/15/2016)... , April 15, 2016 ... "Global Gait Biometrics Market 2016-2020,"  report to their ... ) , ,The global gait biometrics market ... 13.98% during the period 2016-2020. Gait ... which can be used to compute factors that ...
(Date:3/31/2016)... , March 31, 2016  Genomics firm Nabsys has ... CEO, Barrett Bready , M.D., who returned to ... the original technical leadership team, including Chief Technology Officer, ... Product Development, Steve Nurnberg and Vice President of Software ... the company. Dr. Bready served as CEO ...
(Date:3/22/2016)... PROVO and SANDY, Utah ... Ontario (NSO), which operates the highest sample volume laboratory ... and Tute Genomics and UNIConnect, leaders in clinical sequencing ... announced the launch of a project to establish the ... panel. NSO has been contracted by ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... While the ... such as the Cary 5000 and the 6000i models are higher end machines that ... the height of the spectrophotometer’s light beam from the bottom of the cuvette holder. ...
(Date:6/23/2016)... , June 23, 2016   Boston ... of novel compounds designed to target cancer stemness ... has been granted Orphan Drug Designation from the ... treatment of gastric cancer, including gastroesophageal junction (GEJ) ... inhibitor designed to inhibit cancer stemness pathways by ...
(Date:6/23/2016)... ... June 23, 2016 , ... Charm ... Mold) microbial test has received AOAC Research Institute approval 061601. , “This is ... last year,” stated Bob Salter, Vice President of Regulatory and Industrial Affairs. “The ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is ... projects are designed, built and brought to market. , The Design Lab is ...
Breaking Biology Technology: