Human Stem Cell Use: Embryonic Stem Cell

Regulation of Adult Stem Cell Proliferation by RAS and Cell-Permeable Proteins

Our research focuses on developing new tools and models for the next generation of doctors and scientists in all specialties of regenerative medicine. The major obstacles in regenerative medicine are the limited number of pre-existing stem cells and the inability to regulate their proliferation. Our aim is to identify the mechanisms that regulate adult stem […]

A Novel Microenvironment-Mediated Functional Skeletal Muscle from Human Embryonic Stem Cells and their In Vivo Engraftment

Muscle wasting is a serious clinical problem associated with a number of diseases and health conditions, affecting individuals of all ages. Muscular dystrophy (MD) is a form of muscle wasting disease resulting from genetic mutations. Duchenne muscular dystrophy (DMD) is the most common form of MD that limits motility and life expectancy of children. It […]

Molecular dissection of adult liver regeneration to guide the generation of hepatocytes from pluripotent stem cells

The liver is a promising target for cell therapy since it supports and functionally integrates transplanted cells. Human liver contains more than 50 billion cells and more than 10% replacement will be required for most liver diseases. Hence, embryonic stem cells (ESC), which have unlimited growth capacities, represent one of the few cell types with […]

Molecular Mechanisms of Trophoblast Stem Cell Specification and Self-Renewal

Prematurity/preterm birth is the leading cause of neonatal death in the U.S. and in California. During an average day in California, 149 babies are born preterm. These babies are at increased risk for long-term disabilities, including cerebral palsy, gastrointestinal problems, and vision and hearing loss. Many premature babies also suffer from low birth weight, which […]

Derivation and Characterization of Myeloproliferative Disorder Stem Cells from Human ES Cells

Cancer is the leading cause of death for people younger than 85. High cancer mortality rates related to resistance to therapy and malignant progression underscore the need for more sensitive diagnostic techniques as well as therapies that selectively target cells responsible for cancer propagation. Compelling studies suggest that human cancer stem cells (CSC) arise from […]

Mechanisms of chromatin dynamics at enhancers during ES cell differentiation

The human ES cells are euploid cells that can proliferate without limit and maintain the potential to differentiate into all cell types. Differentiation of human ES cells involves selective activation or silencing of genes, a process that involves not only combinatorial interactions between the cis-regulatory sequences and DNA binding transcription factors, but also post-translational histone […]

Molecular mechanisms governing hESC and iPS cell self-renewal and pluripotency

A major problem in regenerative medicine today is that stem cells have the ability to cause tumors and in most cases we currently lack methods to make them safe. For example, two of the most promising stem cells for regenerative medicine, human embryonic stem cells (hESC) and induced pluripotent stem cells (iPS), both readily cause […]

High throughput modeling of human neurodegenerative diseases in embryonic stem cells

An important class of neurological diseases predominantly affects spinal motor neurons, the neurons that control muscle movement. The most well known of these motor neuronopathies is Amyotrophic Lateral Sclerosis (ALS), commonly referred to as Lou Gehrig’s disease for the famous Yankee first baseman who died of the disease. The first symptoms of ALS are usually […]

Induction of cardiogenesis in pluripotent cells via chromatin remodeling factors

Heart disease is one of the biggest killers in the civilized world, and as populations age, this trend will increase dramatically. Currently the only way to treat failing hearts is with expensive and relatively ineffective drugs, or by heart transplantation. Ideally, we would like to be able to regenerate sick or dead heart tissue. The […]

Derivation of Parkinson’s Disease Coded-Stem Cells (PD-SCs)

Parkinson’s disease (PD) is currently the most common neurodegenerative movement disorder, severely debilitating approximately 1-2% of the US population. The disease is caused by a selective loss of dopamine-producing neurons located in a specific region of the brain. This loss leads to significant motor function impairment and age-dependent tremors. Unfortunately there is currently no cure […]