Paul D. Lampe
Ph.D., University of Minnesota, Biochemistry, 1984.
BA, Carleton College, 1979.
The Lampe laboratory investigates the control of cell growth both at the cell biological/ mechanistic level and through cancer biomarker discovery. We study the cell biology connecting gap junctions and intercellular communication (GJIC) with the control of cell growth, the cell cycle and, how the relationship is disrupted during carcinogenesis. Our interest in gap junctions as potential biomarkers of cancer and, more recently, the advent of new screening methodologies has expanded our efforts into broad proteomic screens for potential cancer biomarkers using mass spectrometry (MS) and recombinant antibody array technologies. We are currently collaborating with several Seattle and National and International colleagues to study potential biomarkers for ovarian, pancreas, colon and breast cancer. Our ongoing cell/molecular research involves the regulation of gap junction assembly and function. Gap junctions allow diffusion of small molecules (<1000 MW) between adjacent cells via matched cell-to-cell membrane channels. Cell-cell communication via these channels is known to play an important role in the control of cell proliferation, embryonic development, cell differentiation, and the regulation of differentiated function in post-mitotic cells. Vertebrate gap junctions are composed of proteins derived from the connexin gene family, and our results indicate that gap junction formation and degradation are highly regulated via protein kinases at various stages of the assembly process and the cell cycle. Ongoing studies include determination of the cellular localization of different connexin phosphorylation events and the specific serine substrates that are phosphorylated within connexins at different stages of the cell cycle. Thus, we attempt to link the activation of specific kinases to phosphorylation on a particular residue within the connexin protein and to connexin function in tissue including skin and heart. Our data indicates that kinases such as PKA, PKC, CK1, cdc2/cyclinB, MAP-K and others regulate specific steps of gap junction protein export, assembly, channel gating and degradation in a cell cycle dependent manner. The connection between cell cycle control and gap junctions has recently been strengthened by our data linking the cell cycle regulatory protein p27 with connexin expression. To perform these studies of gap junction function, we utilize a variety of cell, molecular and biochemical techniques including GFP chimeras to monitor gap junctions in living cells.
Current Laboratory Members:
Joell Solan - Postdoc
Lucrecia Marquez-Rosado - Postdoc
Clarence Dunn - Postdoc
Rachael Norris - Postdoc
Jung Hyun Rho - Postdoc
Steven Chen - Grad Student, Biochemistry program
Justin Mirus - Grad Student, MCB program
Perry Thornton - Technician
Role of Akt and Ca(2+) on cell permeabilization via connexin43 hemichannels induced by metabolic inhibition.. Biochimica et biophysica acta. 1852(7):1268-77.. 2015.
Intercellular signaling via cyclic GMP diffusion through gap junctions restarts meiosis in mouse ovarian follicles.. Proceedings of the National Academy of Sciences of the United States of America. 112(17):5527-32.. 2015.
Cross-species antibody microarray interrogation identifies a 3-protein panel of plasma biomarkers for early diagnosis of pancreas cancer.. Clinical cancer research : an official journal of the American Association for Cancer Research. 21(7):1764-71.. 2015.
Injury-triggered Akt phosphorylation of Cx43: a ZO-1-driven molecular switch that regulates gap junction size.. Journal of cell science. 127(Pt 2):455-64.. 2014.
Dermcidin expression is associated with disease progression and survival among breast cancer patients.. Breast cancer research and treatment.. 2014.
Gap junction regulation of vascular tone: implications of modulatory intercellular communication during gestation.. Advances in experimental medicine and biology. 814:117-32.. 2014.
High-throughput screening for native autoantigen-autoantibody complexes using antibody microarrays.. Journal of proteome research. 12(5):2311-20.. 2013.
Cardiomyocyte FGF signaling is required for Cx43 phosphorylation and cardiac gap junction maintenance.. Experimental cell research.. 2013.
Connexins and steroidogenesis in mouse Leydig cells.. Canadian journal of physiology and pharmacology. 91(2):157-64.. 2013.
Histone deacetylase inhibition reduces cardiac connexin43 expression and gap junction communication.. Frontiers in pharmacology. 4:44.. 2013.
Loss of MAPK Phosphorylation of Connexin43 is Neuroprotective in Stroke. Stroke. 44:E211–E211.. 2013.
Discovery and preliminary confirmation of novel early detection biomarkers for triple-negative breast cancer using preclinical plasma samples from the Women's Health Initiative observational study.. Breast cancer research and treatment. 135(2):611-8.. 2012.
Changes in connexin43 expression and localization during pancreatic cancer progression.. The Journal of membrane biology. 245(5-6):255-62.. 2012.
Introduction paper of the special issue on gap junctions in honor of ross johnson.. The Journal of membrane biology. 245(5-6):217-9.. 2012.
Phosphorylation of Serine Residues in the C-terminal Cytoplasmic Tail of Connexin43 Regulates Proliferation of Ovarian Granulosa Cells.. The Journal of membrane biology. 245(5-6):291-301.. 2012.
MAPK phosphorylation of connexin 43 promotes binding of cyclin e and smooth muscle cell proliferation.. Circulation research. 111(2):201-11.. 2012.
Activation of AKT, but not connexin43 ubiquitination, regulates gap junction stability.. The Journal of biological chemistry. 287(4):2600-7.. 2012.
CASK (LIN2) interacts with Cx43 in wounded skin and their coexpression affects cell migration.. Journal of cell science. 125(Pt 3):695-702.. 2012.
Phosphorylation of connexin43 on S279/282 may contribute to laminopathy-associated conduction defects.. Experimental cell research.. 2012.
Connexin43 phosphorylation in brain, cardiac, endothelial and epithelial tissues.. Biochimica et biophysica acta. 1818(8):1985-92.. 2012.