kyle suico week 3 071614 - University of California, San...
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Modeling Nuclear and Intracellular Calcium Dynamics in Rabbit Ventricular Cardiomyocytes
Kyle-‐David Lim Suico University of Queensland
July 16 2014 UCSD PRIME
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Using the Nimrod toolkit, a set of tools that allows for inves6ga6ng highly complicated parametric systems, my goal is to op6mize Excita6on-‐Contrac6on-‐Transcrip6on-‐Coupling Model (Shannon-‐Bers-‐Michailova Model) for a ventricular cardiomyocyte in rabbits and run sensi6vity analysis in order to elucidate how the model behaves under various s6muli.
The model will be op6mized and fiIed for 4 kine6c measurements of calcium:
§ Systolic (mM) § Diastolic (mM) § Time-‐to-‐peak (ms) § Res6ng 6me to 50% peak calcium concentra6on (ms)
Research Proposal
Hohendanner et al., 2014
Experimental Simulated LeR: Schema6c for a ventricular cardiomyocyte. Right: Experimental calcium vs. simulated data from MATLAB, Both plots show calcium vs. 6me (non-‐dimensionalized).
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Progress: Conducted Sensi6vity Analysis aRer Perturbing Parameters 10%
• Ran sensi6vity analysis and determined effects of perturba6on on kine6c parameters: • Those parameters were selected for op6miza6on based off which produced a significantly nega6ve effect (those to the leR of 0.0 and below a z-‐score of -‐1.5)
• These parameters selected will be fed into Nimrod/O to find op6mal parameter values.
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Future Plans
• Consider the addi6on of a sodium buffering equa6on in the nucleus in order to correct driR within the model.
• Will con6nue fi[ng various ranges of parameter values aRer inves6ga6ng a feasible range of parameters. • Conduct sensi6vity analysis by perturbing parameters in the nucleus by ±10, 30, 50, and 100%.
• Run addi6onal sensi6vity analysis in order to iden6fy mechanisms that regulates nuclear Ca2+
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Australia Zoo & Sunshine Coast Top leR: PRIME Students posing with the Irwin family at the Australia Zoo. BoIom leR: Me riding a merciless croc ea6ng a small child. Top right: A baby koala just waking up for aRernoon lunch. BoIom right: Lunch 6me for Casper the croc! Right: Barely catching the sunset at Noosa Main Beach.
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Acknowledgements
University of California, San Diego ● Dr. McCulloch, Department of Bioengineering ● Dr. Sukri6 Dewan and BriIon Boras ● UCSD PRIME -‐ Dr. Gabriele Wienhausen and Ms. Teri Simas
University of Queensland ● Dr. David Abramson, Centre of Research Compu6ng ● Timos Kipouros and Blair Bethwaite ● Minh Dinh, Hoang Nguyen, and Minh Huynh
Funding by: Revelli Family Scholarship Prime Alumna Haley-‐Hunter Zinck Na6onal Science Founda6on
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R.I.P. Dr. Anushka Michailova In memory of Dr. Michailova… a mother, mentor, and scien6st.