Publications

Scholarly Journals--Published

• Iverson K, McClellan EB, Jonker SS, Louey S. Myocardial growth response to fetal Intralipid infusion in sheep. FASEB J. August 15 2025;39(15):e70911. doi.org/10.1096/fj.202501607R. (08/2025)
• Chattergoon NN, Bose K, Louey S, Jonker SS. Lipid exposure leads to metabolic dysfunction in fetal sheep cardiomyocytes. Physiol Rep. May 2025;13(10):e70386. doi:10.14814/phy2.70386 (05/2025) (link)
• Amodei R, Jonker SS, Lazen E, Nestor CC, Estill CT, Roselli CE. KNDy Neurons and the Control of the Gonadotropic Axis in the Midgestation Fetal Sheep. Endocrinology. Mar 6 2025;doi:10.1210/endocr/bqaf049 (03/2025) (link)
• Hagen MW, Louey S, Alaniz SM, et al. Enhanced myocardial perfusion in late gestation fetal lambs with impaired left ventricular inflow. J Physiol. Feb 2025;603(4):971-987. doi:10.1113/JP286685 (02/2025) (link)
• Bose K, Louey S, Jonker SS. Validation of reference genes for cardiac RT-qPCR studies spanning the fetal to adult period. MethodsX. Dec 2024;13:103042. doi:10.1016/j.mex.2024.103042 (12/2024) (link)
• Bose K, Espinoza HM, Louey S, Jonker SS. Sensitivity and activation of endoplasmic reticulum stress response and apoptosis in the perinatal sheep heart. Am J Physiol Heart Circ Physiol. Jul 1 2024;327(1):H1-H11. doi:10.1152/ajpheart.00043.2024 (07/2024) (link)
• Jonker SS, Louey S. Fetal cardiac troponin I levels decline toward birth in sheep. Am J Physiol Heart Circ Physiol. Jun 1 2024;326(6):H1538-H1543. doi:10.1152/ajpheart.00224.2024 (06/2024) (link)
• Manfra O, Louey S, Jonker SS, et al. Augmenting workload drives T-tubule assembly in developing cardiomyocytes. J Physiol. May 2 2023;doi:10.1113/JP284538 (05/2024) (link)
• Piccolo BD, Chen A, Louey S, Thornburg KLR, Jonker SS. Physiological response to fetal intravenous lipid emulsion. Clin Sci (Lond). Feb 7 2024;138(3):117-134. doi:10.1042/CS20231419 (02/2024) (link)
• Onohara D, Hagen M, Louey S, Giraud G, Jonker S, Padala M. Chronic in utero mitral inflow obstruction unloads left ventricular volume in a novel late gestation fetal lamb model. JTCVS Open. Dec 2023;16:698-707. doi:10.1016/j.xjon.2023.09.036 (12/2023) (link)
• Chattergoon N, Louey S, Jonker SS, Thornburg K. Thyroid hormone increases fatty acid use in fetal ovine cardiac myocytes. Physiol Rep. November 2023;11(22):e15865. doi:doi.org/10.14814/phy2.15865 (11/2023) (link)
• Hagen MW, Louey S, Alaniz SM, et al. Changes in microvascular perfusion of heart and skeletal muscle in sheep around the time of birth. Exp Physiol. Jan 2023;108(1):135-145. doi:10.1113/EP090809 (01/2023) (link)
• Hagen MW, Louey S, Alaniz SM, Brown L, Lindner JR, Jonker SS. Coronary conductance in the normal development of sheep during the perinatal period. Physiol Rep. Dec 2022;10(23):e15523. doi:10.14814/phy2.15523 (12/2022) (link)
• Amodei R, Jonker SS, Whitler W, Estill CT, Roselli CE. The GnRH antagonist degarelix suppresses gonadotropin secretion and pituitary sensitivity in midgestation sheep fetuses. Endocrinology. Feb 1 2022;163(2)doi:10.1210/endocr/bqab262 (02/2022) (link)
• Rozance PJ, Wesolowski SR, Jonker SS, Brown LD. Anemic hypoxemia reduces myoblast proliferation and muscle growth in late-gestation fetal sheep. Am J Physiol Regul Integr Comp Physiol. Sep 1 2021;321(3):R352-R363. doi:10.1152/ajpregu.00342.2020 (09/2021) (link)
• White A, Stremming J, Boehmer BH, et al. Reduced glucose-stimulated insulin secretion following a 1-wk IGF-1 infusion in late gestation fetal sheep is due to an intrinsic islet defect. Am J Physiol Endocrinol Metab. Jun 1 2021;320(6):E1138-E1147. doi:10.1152/ajpendo.00623.2020 (06/2021) (link)
• Jonker SS, Vasquez Guzman CE, McCully BH. Addressing structural racism within institutional bodies regulating research. J Appl Physiol (1985). Jun 1 2021;130(6):1668-1671. doi:10.1152/japplphysiol.00853.2020 (06/2021) (link)
• Stremming J, Heard S, White A, et al. IGF-1 infusion to fetal sheep increases organ growth but not by stimulating nutrient transfer to the fetus. Am J Physiol Endocrinol Metab. Mar 1 2021;320(3):E527-E538. doi:10.1152/ajpendo.00453.2020 (03/2021) (link)
• Jonker SS, Giraud GD, Chang EI, Elman MR, Louey S. Coronary vascular growth matches IGF-1-stimulated cardiac growth in fetal sheep. FASEB J. Aug 2020;34(8):10041-10055. doi:10.1096/fj.202000215R (08/2020) (link)
• Amodei R, Gribbin K, He W, et al. Role for kisspeptin and neurokinin B in regulation of luteinizing hormone and testosterone secretion in the fetal sheep. Endocrinology. Apr 1 2020;161(4)doi:10.1210/endocr/bqaa013 (04/2020) (link)
• Snelling EP, Seymour RS, Giussani DA, et al. Scaling of cardiac morphology is interrupted by birth in the developing sheep Ovis aries. J Anat. Jul 2019;235(1):96-105. doi:10.1111/joa.12990 (07/2019) (link)
• Karamlou T, Giraud GD, McKeogh D, et al. Right ventricular remodeling in response to volume overload in fetal sheep. Am J Physiol Heart Circ Physiol. May 1 2019;316(5):H985-H991. doi:10.1152/ajpheart.00439.2018 (05/2019) (link)
• Wilburn AN, Giraud GD, Louey S, Morgan T, Gandhi N, Jonker SS. Systemic arterial hypertension but not IGF-I treatment stimulates cardiomyocyte enlargement in neonatal lambs. Am J Physiol Regul Integr Comp Physiol. Nov 1 2018;315(5):R1038-R1048. doi:10.1152/ajpregu.00198.2018 (11/2018) (link)
• Jonker SS, Kamna D, LoTurco D, Kailey J, Brown LD. IUGR impairs cardiomyocyte growth and maturation in fetal sheep. J Endocrinol. Nov 1 2018;239(2):253-265. doi:10.1530/JOE-18-0382 (11/2018) (link)
• Jonker SS, Louey S, Roselli CE. Cardiac myocyte proliferation and maturation near term is inhibited by early gestation maternal testosterone exposure. Am J Physiol Heart Circ Physiol. Nov 1 2018;315(5):H1393-H1401. doi:10.1152/ajpheart.00314.2018 (11/2018) (link)
• White A, Louey S, Chang EI, et al. A 1 week IGF-1 infusion decreases arterial insulin concentrations but increases pancreatic insulin content and islet vascularity in fetal sheep. Physiol Rep. Sep 2018;6(17):e13840. doi:10.14814/phy2.13840 (09/2018) (link)
• Davis L, Musso J, Soman D, Louey S, Nelson JW, Jonker SS. Role of adenosine signaling in coordinating cardiomyocyte function and coronary vascular growth in chronic fetal anemia. Am J Physiol Regul Integr Comp Physiol. Sep 1 2018;315(3):R500-R508. doi:10.1152/ajpregu.00319.2017 (09/2018) (link)
• Benjamin JS, Culpepper CB, Brown LD, et al. Chronic anemic hypoxemia attenuates glucose-stimulated insulin secretion in fetal sheep. Am J Physiol Regul Integr Comp Physiol. Apr 1 2017;312(4):R492-R500. doi:10.1152/ajpregu.00484.2016 (04/2017) (link)
• Jonker SS, Davis L, Soman D, et al. Functional adaptations of the coronary microcirculation to anaemia in fetal sheep. J Physiol. Nov 1 2016;594(21):6165-6174. doi:10.1113/JP272696 (11/2016) (link)
• Culpepper C, Wesolowski SR, Benjamin J, et al. Chronic anemic hypoxemia increases plasma glucagon and hepatic PCK1 mRNA in late-gestation fetal sheep. Am J Physiol Regul Integr Comp Physiol. Jul 1 2016;311(1):R200-8. doi:10.1152/ajpregu.00037.2016 (07/2016) (link)
• Jonker SS, Ra'anan A. Alternatives can present complex challenges. Lab Anim (NY). May 2016;45(5):161. doi:10.1038/laban.995 (05/2016) (link)
• Jonker SS, Louey S. Endocrine and other physiologic modulators of perinatal cardiomyocyte endowment. J Endocrinol. Jan 2016;228(1):R1-18. doi:10.1530/JOE-15-0309 (01/2016) (link)
• Tibayan FA, Louey S, Jonker SS, et al. Increased systolic load causes adverse remodeling of fetal aortic and mitral valves. Am J Physiol Regul Integr Comp Physiol. Dec 15 2015;309(12):R1490-8. doi:10.1152/ajpregu.00040.2015 (12/2015) (link)
• Jonker SS, Louey S, Giraud GD, Thornburg KL, Faber JJ. Timing of cardiomyocyte growth, maturation, and attrition in perinatal sheep. FASEB J. Oct 2015;29(10):4346-57. doi:10.1096/fj.15-272013 (10/2015) (link)
• DuBois B, Louey S, Giraud GD, Cherala G, Jonker SS. Theophylline pharmacokinetics in foetal sheep: maternal metabolic capacity is the principal driver. Basic Clin Pharmacol Toxicol. Oct 2015;117(4):226-33. doi:10.1111/bcpt.12395 (10/2015) (link)
• Jonker SS, Giraud GD, Espinoza HM, Davis EN, Crossley DA, 2nd. Effects of chronic hypoxia on cardiac function measured by pressure-volume catheter in fetal chickens. Am J Physiol Regul Integr Comp Physiol. Apr 15 2015;308(8):R680-9. doi:10.1152/ajpregu.00484.2014 (04/2015) (link)
• Anderson DF, Jonker SS, Louey S, Cheung CY, Brace RA. Regulation of intramembranous absorption and amniotic fluid volume by constituents in fetal sheep urine. Am J Physiol Regul Integr Comp Physiol. Sep 2013;305(5):R506-11. doi:10.1152/ajpregu.00175.2013 (09/2013) (link)
• Thornburg K, Jonker SS, O'Tierney P, et al. Regulation of the cardiomyocyte population in the developing heart. Prog Biophys Mol Biol. Jul 2011;106(1):289-99. doi:10.1016/j.pbiomolbio.2010.11.010 (07/2011) (link)
• Jonker SS, Scholz TD, Segar JL. Transfusion effects on cardiomyocyte growth and proliferation in fetal sheep after chronic anemia. Pediatr Res. Jun 2011;69(6):485-90. doi:10.1203/PDR.0b013e3182181e01 (06/2011) (link)
• Jonker SS, Scholz TD, Segar JL. The effect of adrenalectomy on the cardiac response to subacute fetal anemia. Can J Physiol Pharmacol. Feb 2011;89(2):79-88. doi:10.1139/y10-108 (02/2011) (link)
• Crossley DA, 2nd, Jonker SS, Hicks JW, Thornburg KL. Maturation of the angiotensin II cardiovascular response in the embryonic White Leghorn chicken (Gallus gallus). J Comp Physiol B. Oct 2010;180(7):1057-65. doi:10.1007/s00360-010-0473-y (10/2010) (link)
• Jonker SS, Giraud MK, Giraud GD, et al. Cardiomyocyte enlargement, proliferation and maturation during chronic fetal anaemia in sheep. Exp Physiol. Jan 2010;95(1):131-9. doi:10.1113/expphysiol.2009.049379 (01/2010) (link)
• Jonker SS, Anderson DF, Davis LE, Yang Q, Faber JJ, Giraud GD. Persistent changes in arterial blood gases in fetal sheep. Lab Anim. Jul 2008;42(3):326-30. doi:10.1258/la.2007.06005e (07/2008) (link)
• Louey S, Jonker SS, Giraud GD, Thornburg KL. Placental insufficiency decreases cell cycle activity and terminal maturation in fetal sheep cardiomyocytes. J Physiol. Apr 15 2007;580(Pt. 2):639-48. doi:10.1113/jphysiol.2006.122200 (04/2007) (link)
• Jonker SS, Zhang L, Louey S, Giraud GD, Thornburg KL, Faber JJ. Myocyte enlargement, differentiation, and proliferation kinetics in the fetal sheep heart. J Appl Physiol (1985). Mar 2007;102(3):1130-42. doi:10.1152/japplphysiol.00937.2006 (03/2007) (link)
• Jonker SS, Faber JJ, Anderson DF, Thornburg KL, Louey S, Giraud GD. Sequential growth of fetal sheep cardiac myocytes in response to simultaneous arterial and venous hypertension. Am J Physiol Regul Integr Comp Physiol. Feb 2007;292(2):R913-9. doi:10.1152/ajpregu.00484.2006 (02/2007) (link)
• Giraud GD, Faber JJ, Jonker SS, Davis L, Anderson DF. Effects of intravascular infusions of plasma on placental and systemic blood flow in fetal sheep. Am J Physiol Heart Circ Physiol. Dec 2006;291(6):H2884-8. doi:10.1152/ajpheart.00428.2006 (12/2006) (link)
• Faber JJ, Anderson DF, Jonker SS, Davis LE, Giraud GD. Fetal infusions of plasma cause an increase in umbilical vascular resistance in sheep. Placenta. Aug 2006;27(8):876-81. doi:10.1016/j.placenta.2005.09.003 (08/2006) (link)
• Giraud GD, Louey S, Jonker SS, Schultz J, Thornburg KL. Cortisol stimulates cell cycle activity in the cardiomyocyte of the sheep fetus. Endocrinology. Aug 2006;147(8):3643-9. doi:10.1210/en.2006-0061 (08/2006) (link)
• Giraud GD, Faber JJ, Jonker SS, Davis L, Anderson DF. Intravascular infusions of plasma into fetal sheep cause arterial and venous hypertension. J Appl Physiol (1985). Sep 2005;99(3):884-9. doi:10.1152/japplphysiol.01429.2004 (09/2005) (link)
• Jonker SS, Davis LE, van der Bilt JD, et al. Anaemia stimulates aquaporin 1 expression in the fetal sheep heart. Exp Physiol. Nov 2003;88(6):691-8. doi:10.1113/eph8802626 (11/2003) (link)