A protein that helps make neurons also works to reprogram scar tissue cells into heart muscle cells, especially in partnership with a second protein, according to a study led by Li Qian, PhD, at the UNC School of Medicine.
CHAPEL HILL, N.C. Scientists at the UNC School of Medicine have made a significant advance in the promising field of cellular reprogramming and organ regeneration, and the discovery could play a major role in future medicines to heal damaged hearts.
In a study published in the journal Cell Stem Cell, scientists at the University of North Carolina at Chapel Hill discovered a more streamlined and efficient method for reprogramming scar tissue cells (fibroblasts) to become healthy heart muscle cells (cardiomyocytes). Fibroblasts produce the fibrous, stiff tissue that contributes to heart failure after a heart attack or because of heart disease. Turning fibroblasts into cardiomyocytes is being investigated as a potential future strategy for treating or even someday curing this common and deadly condition.
Surprisingly, the key to the new cardiomyocyte-making technique turned out to be a gene activity-controlling protein called Ascl1, which is known to be a crucial protein involved in turning fibroblasts into neurons. Researchers had thought Ascl1 was neuron-specific.
Its an outside-the-box finding, and we expect it to be useful in developing future cardiac therapies and potentially other kinds of therapeutic cellular reprogramming, said study senior author Li Qian, PhD, associate professor in the UNC Department of Pathology and Lab Medicine and associate director of the McAllister Heart Institute at UNC School of Medicine.
Scientists over the last 15 years have developed various techniques to reprogram adult cells to become stem cells, then to induce those stem cells to become adult cells of some other type. More recently, scientists have been finding ways to do this reprogramming more directly straight from one mature cell type to another. The hope has been that when these methods are made maximally safe, effective, and efficient, doctors will be able to use a simple injection into patients to reprogram harm-causing cells into beneficial ones.
Reprogramming fibroblasts has long been one of the important goals in the field, Qian said. Fibroblast over-activity underlies many major diseases and conditions including heart failure, chronic obstructive pulmonary disease, liver disease, kidney disease, and the scar-like brain damage that occurs after strokes.
In the new study, Qians team, including co-first-authors Haofei Wang, PhD, a postdoctoral researcher, and MD/PhD student Benjamin Keepers, used three existing techniques to reprogram mouse fibroblasts into cardiomyocytes, liver cells, and neurons. Their aim was to catalogue and compare the changes in cells gene activity patterns and gene-activity regulation factors during these three distinct reprogrammings.
Unexpectedly, the researchers found that the reprogramming of fibroblasts into neurons activated a set of cardiomyocyte genes. Soon they determined that this activation was due to Ascl1, one of the master-programmer transcription factor proteins that had been used to make the neurons.
Since Ascl1 activated cardiomyocyte genes, the researchers added it to the three-transcription-factor cocktail they had been using for making cardiomyocytes, to see what would happen. They were astonished to find that it dramatically increased the efficiency of reprogramming the proportion of successfully reprogrammed cells by more than ten times. In fact, they found that they could now dispense with two of the three factors from their original cocktail, retaining only Ascl1 and another transcription factor called Mef2c.
In further experiments they found evidence that Ascl1 on its own activates both neuron and cardiomyocyte genes, but it shifts away from the pro-neuron role when accompanied by Mef2c. In synergy with Mef2c, Ascl1 switches on a broad set of cardiomyocyte genes.
Ascl1 and Mef2c work together to exert pro-cardiomyocyte effects that neither factor alone exerts, making for a potent reprogramming cocktail, Qian said.
The results show that the major transcription factors used in direct cellular reprogramming arent necessarily exclusive to one targeted cell type.
Perhaps more importantly, they represent another step on the path towards future cell-reprogramming therapies for major disorders. Qian says that she and her team hope to make a two-in-one synthetic protein that contains the effective bits of both Ascl1 and Mef2c, and could be injected into failing hearts to mend them.
Cross-lineage Potential of Ascl1 Uncovered by Comparing Diverse Reprogramming Regulatomes was co-authored by Haofei Wang, Benjamin Keepers, Yunzhe Qian, Yifang Xie, Marazzano Colon, Jiandong Liu, and Li Qian. Funding was provided by the American Heart Association and the National Institutes of Health (T32HL069768, F30HL154659, R35HL155656, R01HL139976, R01HL139880).
Media contact: Mark Derewicz, 919-923-0959
See original here:
Scientists Discover Protein Partners that Could Heal Heart Muscle | Newsroom - UNC Health and UNC School of Medicine
- Gene Therapy for Genetic Disease: The Long and Winding Road [Last Updated On: August 17th, 2024] [Originally Added On: October 10th, 2011]
- Gene Doping: Super Athletes in 2008 Beijing Olympics - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 14th, 2011]
- The 3 Rs of DNA: Molecules to Medicine - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 15th, 2011]
- BIT 3.1 Entrez Gene - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 15th, 2011]
- Professor Ian Everall - Gene expression in schizophrenia - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 16th, 2011]
- Gene Therapy Promising Treatment (Part 2 of 4) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 16th, 2011]
- Cancer Research @ NC State's Centennial Biomedical Campus - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 16th, 2011]
- Gene Therapy Promising Treatment (Part 1 of 1) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 19th, 2011]
- HiTech_U3L3_Biotech in Medicine - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 19th, 2011]
- Sri Sathya Sai Medical Camps Worldwide - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 20th, 2011]
- Dr. Joseph M. DeSimone: 2008 Winner, $500000 Lemelson-MIT Prize - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 21st, 2011]
- Non-Hodgkin's Lymphoma Cancer Survivor Testimony - (Sanoviv Medical Institute) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 22nd, 2011]
- Vaccines: Medicine for the Healthy - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 24th, 2011]
- For Your Health - Health Care Informatics - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 24th, 2011]
- A Century of Stem Cells - Johns Hopkins Medicine - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 24th, 2011]
- Functional Repair of Human Donor Lung by IL-10 Gene Therapy (EX VIVO Lung) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 25th, 2011]
- Science Talk: Vaccine Made With Synthetic Gene Protects Against Deadly Pneumonia - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 25th, 2011]
- Health Matters: Family Medicine - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 26th, 2011]
- Dr. Jeffrey Myers Explains Genetic Variations in Head and Neck Cancer - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- The Emerging Network of Data for Understanding the Interactions of Genes and Drugs - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Burzynski_ Cancer Is Serious Business Part 4/8. wmv - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Pt2: Do you understand the new genetics? Maybe you don't have that gene! - Andrew Shelling - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Alien Genetic Takeover of Humanity! - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Burzynski | 2-DVD Set Extended Edition Montage Preview of New Material | Cancer Is Serious Business - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Genes, Genomes and the Future of Medicine - Richard Lifton, MD, Ph.D. - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Burzynski The Movie ~ Cancer Is Serious Business ~ High Quality - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Designing Life for Mars Colonization (Brainstorm Ep20) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- Dedication Event: Santa Monica UCLA Medical Center [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- DR. Burzynski The Movie - Cancer Is Serious Business (PT.1) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 27th, 2011]
- burzy - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Alien Genetic Takeover: The End of Humanity - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Burzynski_ Cancer Is Serious Business Part 1/8 .wmv - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Mike Schmidt - ECMO Patient - Penn State Hershey Medical Center - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Disrupting the HIV Virus (Brainstorm Ep24) - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Diagnosis and Treatment of Hepatorenal Syndrome - Moving Targets? - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Big Bucks, Big Pharma: Marketing Disease and Pushing Drugs - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Roles of RNA in Gene Regulation - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Diatom PCR Colony Screen - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Kleanthis G. Xanthopoulos, Ph.D., CEO, Regulus, talking on the impact of microRNA medicines - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Burzynski_ Cancer Is Serious Business Part 2/8 .wmv - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 28th, 2011]
- Sickle Cell Anemia: Stem Cell Gene Therapy - A Patient's Perspective - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 29th, 2011]
- Gene-based lung cancer treatment video - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 29th, 2011]
- HIV Resistant Genes...Rhesus Negative, Excess PK [Last Updated On: August 17th, 2024] [Originally Added On: October 29th, 2011]
- Futures in Biotech 83: Bioinformatics: Essential Gene names Skewed in a Network of Blame - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 29th, 2011]
- Keeping Blood Young, Fighting Sickle Cells (Brainstorm Ep28 - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 31st, 2011]
- News@Northwestern - NUGENE - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 31st, 2011]
- UK Medical Student Mary Burchett's Research is Personal - Video [Last Updated On: August 17th, 2024] [Originally Added On: October 31st, 2011]
- Cannabis 4 Crohn's: 2 Years As Medical Marijuana Patient, Dr Mind Bender [Last Updated On: August 17th, 2024] [Originally Added On: November 8th, 2011]
- Medical Haptical Robot for the Eye - Eye-Rhas, - TU Eindhoven - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 8th, 2011]
- The Ghost in Your Genes - Horizon - BBC - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 9th, 2011]
- The Ghost in Your Genes - BBC Horizon - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 13th, 2011]
- Burzynski: Cancer Is Serious Business (Trailer) - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 16th, 2011]
- Genes, Ancestry, and Personalized Medicine with Dr. Michael Kane - Interview Part 1.mp4 - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 25th, 2011]
- The Suicide Gene - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 29th, 2011]
- Ard Louis on Dawkins and Selfish Genes - Video [Last Updated On: August 17th, 2024] [Originally Added On: November 30th, 2011]
- TEDxLex - Dr. Alicia L. Bertone - Gene Jockeying for a Win in Regenerative Medicine.mp4 - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 3rd, 2011]
- Introduction to Gene Network - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 7th, 2011]
- The demise of a dogma. The deaf somatic gene listens - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 7th, 2011]
- Future of health care, hospitals, medicine and wellbeing - by Dr Patrick Dixon - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 8th, 2011]
- Electro-Medicine : Biological Physics : Neurological Research Advancements - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 12th, 2011]
- Haemophilia gene therapy breakthrough - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 15th, 2011]
- Duke researchers: Gene discovery explains how fruit flies retreat from heat - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 16th, 2011]
- Focus on Nikolaus Rajewsky - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 18th, 2011]
- Deadly Monopolies Medical Ethicist Harriet Washington on How Firms are Taking Over Life Itself - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 23rd, 2011]
- Open fetal surgery: past, present and future - Video [Last Updated On: August 17th, 2024] [Originally Added On: December 23rd, 2011]
- The Human Genome and Individualized Medicine - David Valle, MD - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 14th, 2012]
- Environmental Contributors to Autism Spectrum Disorders - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 20th, 2012]
- When Cancer Runs in the Family - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 20th, 2012]
- Genome Enabled Electronic Medical Record (GenE EMR) - William Knaus - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 22nd, 2012]
- Nuvigil withdrawal - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 23rd, 2012]
- Cancer Cure Documentary - Dr. Burzynski Antineoplaston Therapy - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 26th, 2012]
- Next Generation Cancer Gene Sequencing for Clinically Actionable Mutations - Video [Last Updated On: August 17th, 2024] [Originally Added On: January 26th, 2012]
- Fibrocell Science, Inc. Announces Recognition for LAVIV™ (azficel-T) at The 2012 Cell & Gene Therapy Forum, Washington ... [Last Updated On: August 17th, 2024] [Originally Added On: January 31st, 2012]
- Gene Mutation Linked to Inappropriate Lipid Buildup in Liver [Last Updated On: August 17th, 2024] [Originally Added On: February 1st, 2012]
- 'Goldilocks' gene could determine best treatment for tuberculosis patients [Last Updated On: August 17th, 2024] [Originally Added On: February 3rd, 2012]
- James Wilson, MD, Ph.D., on Gene Therapy as a Disruptive Technology - Video [Last Updated On: August 17th, 2024] [Originally Added On: February 3rd, 2012]
- 'Goldilocks' gene used to find drug treatment that is 'just right' for TB patients [Last Updated On: August 17th, 2024] [Originally Added On: February 4th, 2012]
- Gene therapy, a totally Italian success - Video [Last Updated On: August 17th, 2024] [Originally Added On: February 4th, 2012]
- Electro-Medicine : Neurons function revealed - Video [Last Updated On: August 17th, 2024] [Originally Added On: February 4th, 2012]
- Gene mutation discovery sparks hope for effective endometriosis screening [Last Updated On: August 17th, 2024] [Originally Added On: February 7th, 2012]