David I. Yule, Ph.D.

David I. Yule, Ph.D.

Contact Information

University of Rochester Medical Center
School of Medicine and Dentistry
601 Elmwood Ave, Box 711
Rochester, NY 14642

Office: (585) 273-2154
Lab: (585) 275-6128
Fax: (585) 273-2652

Research Bio

In exocrine acinar cells regulation of intracellular calcium plays a pivotal role in controlling fluid and protein secretion. Exposure of cells to neurotransmitters and hormones results in a rapid elevation of intracellular calcium. This increase in [Ca2+]i carries complex spatial and temporal information important to the physiology of the acinar cell. Research in this laboratory focuses on gaining a better understanding of the mechanisms which underlie these signaling patterns with a primary goal of relating this knowledge to the physiology and pathophysiology of exocrine cells.
Although all Ca2+ mobilizing agonists in pancreatic acinar cells utilize the phosphoinositide-signaling (PI) pathway, stimulation by individual agents results in markedly different temporal and spatial patterns of Ca2+ signaling. One project is designed to understand at the molecular level how the cell effectively "knows" which PI-coupled agonist it is currently exposed to. Given that tremendous molecular diversity is expressed at all levels of this signaling pathway, our working hypothesis is that individual agonists do not couple to the signaling machinery in an identical fashion. This study involves precisely defining by molecular techniques the individual signaling proteins expressed in the acinar cell and then subsequently assessing if individual agonists utilize discrete and different elements of the PI-signaling pathway. We are utilizing fluorescence imaging techniques including high-speed confocal microscopy to monitor [Ca2+]i while manipulating the signaling pathway with neutralizing antibodies and antisense technology.

A further project relates to the organization and regulation of calcium release sites in exocrine cells. These organelles are defined by the expression of receptors for the second messenger Inositol 1,4,5-trisphosphate. In acinar cells the distribution of these receptors is tightly localized to an area associated with the actin cytoskeleton in the apical secretory pole of the cell. This distribution of receptors is the major factor in defining the spatial characteristics of the Ca2+ signal. The nature of the association with the cytoskeleton is being investigated. In addition the regulation of these receptors by phosphorylation and the consequences this may have for Ca2+ signaling are also being studied.

Recent Journal Articles

Showing the 5 most recent journal articles. 127 available »

2016 Aug 2
Ivanova H, Ritane A, Wagner L, Luyten T, Shapovalov G, Welkenhuyzen K, Seitaj B, Monaco G, De Smedt H, Prevarskaya N, Yule DI, Parys JB, Bultynck G. "The trans-membrane domain of Bcl-2?, but not its hydrophobic cleft, is a critical determinant for efficient IP3 receptor inhibition." Oncotarget. 2016 Aug 2; :55704-55720. Epub 2016 Aug 02.
2016 Jun 1
Wang L, Alzayady KJ, Yule DI. "Proteolytic fragmentation of inositol 1,4,5-trisphosphate receptors: a novel mechanism regulating channel activity?" The Journal of physiology. 2016 Jun 1; 594(11):2867-76. Epub 2015 Dec 07.
2016 May 5
Gerber S, Alzayady KJ, Burglen L, Brémond-Gignac D, Marchesin V, Roche O, Rio M, Funalot B, Calmon R, Durr A, Gil-da-Silva-Lopes VL, Ribeiro Bittar MF, Orssaud C, Héron B, Ayoub E, Berquin P, Bahi-Buisson N, Bole C, Masson C, Munnich A, Simons M, Delous M, Dollfus H, Boddaert N, Lyonnet S, Kaplan J, Calvas P, Yule DI, Rozet JM, Fares Taie L. "Recessive and Dominant De Novo ITPR1 Mutations Cause Gillespie Syndrome." American journal of human genetics. 2016 May 5; 98(5):971-80. Epub 2016 Apr 21.
2016 May 4
Sneyd J, Means S, Zhu D, Rugis J, Won JH, Yule DI. "Modeling Calcium Waves in an Anatomically Accurate Three-Dimensional Parotid Acinar Cell." Journal of theoretical biology. 2016 May 4; Epub 2016 May 04.
2016 Apr 5
Alzayady KJ, Wang L, Chandrasekhar R, Wagner LE, Van Petegem F, Yule DI. "Defining the stoichiometry of inositol 1,4,5-trisphosphate binding required to initiate Ca2+ release." Science signaling. 2016 Apr 5; 9(422):ra35. Epub 2016 Apr 05.

Current Appointments

Louis C. Lasagna Professorship in Experimental Therapeutics - Department of Pharmacology and Physiology (SMD)
Professor - Department of Pharmacology and Physiology (SMD) - Primary
Professor - Center for Oral Biology
Professor - Department of Medicine, Gastroenterology/Hepatology (SMD)


PhD | Physiology | UK-Univ of Liverpool1989
BS | Pharmacology | UK-Portsmouth Polytechnic1985

Post-Doctoral Training & Residency

M.R.C. Secretory Control Group, Physiology Department, University of Liverpool. Supervisor: Prof. O.H. Petersen. 0
Department of Physiology, University of Michigan. Supervisor: Prof. J.A. Williams. 1992