Therapeutic/Technology: Exploring stem cell mechanisms
Long noncoding RNAs for pluripotency and cell fate commitment
The human body is composed of thousands of cell types, which all came originally from embryonic stem cells. Although all these cell types have the same genetic blueprint, different genes are active in different cells to give each its distinctiveness. The process by which the genes remember whether they are in liver, brain, or skin […]
Role of the NMD RNA Decay Pathway in Maintaining the Stem-Like State
A subset of intellectual disability cases in humans are caused by mutations in an X-linked gene essential for a quality control mechanism called nonsense-mediated RNA decay (NMD). Patients with mutations in this gene—UPF3B—commonly have not only ID, but also schizophrenia, autism, and attention-deficit/hyperactivity disorder. Thus, the study of UPF3B and NMD may provide insight into […]
Studying Arrhythmogenic Right Ventricular Dysplasia with patient-specific iPS cells
Most heart conditions leading to sudden death or impaired pumping heart functions in the young people (
Mechanisms to protect hESC-derived cells from allogenic immune rejection
The potential of human embryonic stem cells (hESC) to differentiate into a tremendous range of biologically active cells/tissues is the basis for many novel therapeutic strategies. However, immune-mediated rejection of hESC-derived tissues by the patient remains a significant barrier to the promise of regenerative therapies. Therefore, it is key to develop strategies to induce immunological […]
Modeling Alexander disease using patient-specific induced pluripotent stem cells
Alexander disease (AxD) is a devastating childhood disease that affects neural development and causes mental retardation, seizures and spasticity. The most common form of AxD occurs during the first two years of life and AxD children show delayed mental and physical development, and die by the age of six. AxD occurs in diverse ethnic, racial, […]
Mechanism of heart regeneration by cardiosphere-derived cells
In the process of a heart attack, clots form suddenly on top of cholesterol-laden plaques, blocking blood flow to heart muscle. As a result, living heart tissue dies and is replaced by scar. The larger the scar, the higher the chance of premature death and disability following the heart attack. While conventional treatments aim to […]
Deciphering transcriptional control of pancreatic beta-cell maturation in vitro
The loss of pancreatic beta-cells in type 1 diabetes results in absence of insulin secreted by the pancreas, and consequently elevated blood sugar which leads to various long-term complications. Diabetic patients would benefit tremendously from availability of transplantable replacement beta-cells. Much of current research focuses on producing beta-cells from stem cells. Despite some progress, it […]
DECIPHERING THE INSTRUCTIONS FOR VERTEBRATE HSC SPECIFICATION AND AMPLIFICATION.
Hematopoietic stem cells (HSCs) are an important population of cells that continuously produce and replace blood and immune cells over the course of our lifetimes. These rare, self-renewing cells are the key element of bone marrow transplants, which are used to treat a variety of conditions including many forms of leukemia and solid tumors. Understanding […]
Trop2 dependent and independent mechanisms of self-renewal in human cancer stem cells
Progress from our group and others has led to the identification of normal prostate tissue stem cells and the definition of important signaling pathways that regulate their growth and maintenance. Human cancers utilize these same pathways to promote malignancy and drive tumor progression. Our recent studies have uncovered an important regulatory molecule (Trop2) that is […]
Phenotyping Human Astrocytes in Health and Disease
An emerging theme from recent research is that autism and schizophrenia are diseases of synapses, the interconnections through which electrical signals are relayed from one neuron to the next neuron in a neural circuit. Up to now, most research has focused on new therapeutics that would target neurons and enhance the number of function of […]