First name,Last name,Preferred title,Overview,Position,Department,Individual
Bruce,Riley,Professor,"My lab studies inner ear development in zebrafish. A prominent feature of our research is to investigate how cell-cell signaling and downstream gene-interactions control development. One project in the lab focuses on how cell signaling regulates ectodermal patterning during gastrulation to establish the otic placode, the precursor of the inner ear. Our recent work shows that localized Fgf signaling is especially critical for inducing formation of the otic placode, and members of the Pax2/5/8 family of transcription factors are important mediators of Fgf signaling. During later stages of inner ear development, we are exploring how sensory hair cells and neurons are regulated. Our studies address how these cells initially form, how they are genetically maintained, and how they become specialized for hearing vs. balance. We are also investigating how zebrafish can replace dead and damaged hair cells, an ability that mammals have lost. The inability to regenerate hair cells explains why humans show progressive irreversible hearing loss as we age. It is hoped that activating or augmenting human homologs of genes shown to operate in zebrafish might help restore hearing and balance in humans.",Professor,Biology,https://scholars.library.tamu.edu/vivo/display/n0dbb8253
Luis,Garcia,Professor,"I am interested in understanding how behavioral states are regulated at the molecular and genetic level. My lab addresses this complex question in the well-studied nematode Caenorhabditis elegans. Several physical aspects of this worm make it convenient for integrating whole organism system biology studies with genetic/molecular analysis of neurobiology and behavior. C. elegans is an anatomically simple organism; it is 1mm in size, and it contains ~ 1000 somatic cells, a third of which are neurons. The worm is also transparent, and thus every cell can be visualized by light microscopy. Behavioral mutants can be efficiently generated through standard chemical mutagenesis. In addition, gene functions involved in motivational and behavioral regulation can be determined by transgenic techniques.
My lab investigates the interplay between feeding and sex-specific mating behavior to understand how chemo/mechano-sensory and motor outputs are controlled under various physiological conditions. We study male mating by using genetics to de-construct this behavior into its fundamental sensory-motor components. We then use a combination of transgenics, pharmacology, classical genetics and laser microsurgery to understand how individual motor sub-behaviors are coordinated to produce gross behaviors during periods when the animal is food deprived, and when it is food satiated.",Professor,Biology,https://scholars.library.tamu.edu/vivo/display/n4cd2f794
Kathryn,Ryan,Instructional Associate Professor,"1. Delineate the function of the Ran cycle in NPC assembly
Model for NPC AssemblyRan is a small GTPase that cycles between a GTP and GDP bound form to regulate many nuclear processes. All 4 components of the Ran cycle were isolated in the npa screen. Characterization of these mutants revealed membrane defects and the accumulation of nucleoporin containing vesicles in the cytoplasm. The accumulation of such vesicles in these npa mutants suggests that NPC assembly involves a Ran-mediated vesicular fusion event at the outer nuclear envelope. In this model of NPC assembly, a subset of nucleoporins is first concentrated in vesicles (A). When the vesicles fuse with the outer nuclear membrane in a Ran-dependent manner (B), a critical, localized concentration of these nucleoporins triggers pore formation (C) and nucleates new NPC assembly (D and E). To test the model, work is being done to characterize these vesicles. This includes biochemical approaches to purify vesicles and cell biological and genetic approaches to determine how vesicle-associated proteins contribute to NPC assembly. In addition, we are working to understand how Ran interacts with these vesicles to mediate vesicle fusion to the outer nuclear membrane.
2. Define additional steps in the NPC assembly pathway
There are events both upstream and downstream of the Ran cycle in the assembly pathway. Further cloning and characterization of mutants from the npa collection will continue to identify factors involved in other steps of NPC biogenesis and provide a platform from which to study these discrete events.",Instructional Associate Professor,Biology,https://scholars.library.tamu.edu/vivo/display/n613870d1
Mark,Zoran,Professor and Associate Dean,"Cellular and Developmental Neurobiology
Research Summary My laboratory studies cellular mechanisms governing the formation of specific synaptic connections between neurons and their targets. These mechanisms include cell-cell recognition and target-dependent induction of the presynaptic secretion machinery. Some of our studies investigate synapse formation of identified motoneurons of the American pond snail, Helisoma trivolvis , following nerve injury in vivo and in cell culture. Since the synapse is the site of most interneuronal communication within the nervous system, an understanding of the development, regeneration and plasticity of these connections is crucial to an ultimate appreciation of neural integration and brain function.
Neural Morphallaxis
We also study a rare form of regeneration called neural morphallaxis in the annelid worm, Lumbriculus variegatus. This organism is ideal for examining behavioral, physiological, cellular and molecular mechanisms of development, regeneration and systems-level plasticity. We have defined the neural correlates of escape reflexes, which are reconfigured during morphallaxis. Recently we have begun investigations of synaptic molecules up-regulated specifically during morphallaxis. This model system is emerging as a valuable educational tool in the science classroom.",Acting Associate Provost for Graduate & Professional Studies||Professor,Biology||Office of the Provost and Executive Vice President,https://scholars.library.tamu.edu/vivo/display/nb36a8003
Richard,Gomer,Distinguished Professor,"Our laboratory is working on three areas of biomedicine, trying to move observations from basic research into the clinic. First, we are studying how the sizes of tissues and tumors are regulated, and how this can be manipulated for therapeutic purposes. As a model system, we are using the simple eukaryote Dictyostelium discoideum, which allows us to combine techniques such as biochemistry, genetics, computer modeling, and cell biology to study tissue size regulation. We have found that a secreted protein as well as the unusual molecule polyphosphate are signals in negative feedback loops that inhibit Dictyostelium cell proliferation, and we are studying the signal transduction pathway to understand similar mechanisms in humans.
Second, we are studying how some secreted proteins can make cells move away from the source of the signal. We found such a signal (called a chemorepellent) in Dictyostelium, and then found a similar signal in humans. We are working to understand the signal transduction pathway for both. The human signal repels neutrophils, and we found that this can be used therapeutically in mouse models of neutrophil-driven diseases such as rheumatoid arthritis and acute respiratory distress syndrome.
Third, we have found that a human blood protein called Serum Amyloid P (SAP) regulates a key step in the formation of scar tissue as well as the formation of the scar-like lesions in fibrosing diseases such as congestive heart failure and pulmonary fibrosis. We are studying this mechanism, and a biotech company (Promedior, now sold to Roche) we co-founded is testing SAP as a therapy for fibrosis in patients in a Phase 3 trials.",Distinguished Professor,Biology,https://scholars.library.tamu.edu/vivo/display/nf41f3898
Uel,Mcmahan,Professor,"McMahan and his research group provide one of the cornerstones for Texas A&M's new Interdisciplinary Life Sciences Building and its related teaching and research efforts. His work focuses on how the nervous system's synapses form in the embryo and function in the adult in various animal species. It relies on high-resolution imaging, chemical characterization and experimental manipulation of specific macromolecules and organelles, which altogether provide insights unobtainable via any other approach. The findings bear directly on the problems of understanding the molecular basis of human brain diseases and restoring brain function after trauma.",Professor,Biology,https://scholars.library.tamu.edu/vivo/display/nfc3672e7