CVI Program Unit(s):
Cardiovascular Development / Congenital Heart Disease
Channel Biology / Electrophysiology
Thrombosis / Hemostasis
CVI Research Description:
Dr. Armstead's research focuses on characterizing mechanisms important in the control of cerebral hemodynamics under physiologic and pathologic conditions such as traumatic brain injury (TBI), stroke, and cerebral hypoxia/ischemia, particularly in the newborn. Current projects focus on interactions between the NMDA receptor and plasminogen activators after TBI, optimizing the efficacy/toxicity ratio of tPA, the only FDA approved treatment for stroke and translational research concerning the roles of sex and age in outcome after pediatric TBI.
Bohman LE, Riley J, Milovanova TN, Sanborn MR, Thom SR, Armstead, WM: Microparticles Impair Hypotensive Cerebrovasodilation and Cause Hippocampal Neuronal Cell Injury after Traumatic Brain Injury. J Neurotrauma 33: 168-174, 2016.
Armstead WM, Riley J, Cines DB, Higazi AAR : PAI-1 derived peptide EEIIMD prevents hypoxia/ischemia induced aggravation of endothelin and thromboxane induced cerebrovasoconstriction. Neurocritical Care 20: 111-118, 2014.
Armstead WM, Bohman LE, Riley J, Yarovoi S, Higazi AAR, Cines DB: tPA-S481A prevents impairment of cerebrovascular autoregulation by endogenous tPA after traumatic brain injury by upregulating p38 MAPK and inhibiting ET-1. J Neurotrauma 30: 1898-1907, 2013.
Armstead WM, Riley J, Vavilala MS: Dopamine prevents impairment of autoregulation after TBI in the newborn pig through inhibition of upregulation of ET-1 and ERK MAPK
Ped Crit Care Med 14: e103-e111, 2013.
Ji F, Wang Z, Ma N, Riley J, Armstead WM, Liu R: Herkinorin dilates cerebral vessels via kappa opioid receptor and cyclic adenosine monophosphate (cAMP) in a piglet model.
Brain Res 1490: 95-100, 2013.
Armstead WM, Riley J, Yarovoi S, Cines DB, Smith DH, Higazi AA: tPA-S481A prevents neurotoxicity of endogenous tPA in traumatic brain injury. J Neurotrauma 29: 1794-1802, 2012.
Armstead WM, Riley J, Vavilala MS: TBI sex dependently upregulates ET-1 to impair autoregulation which is aggravated by phenylephrine in males but is abrogated in females. J Neurotrauma 29: 1483-1490, 2012.
Armstead WM, Ganguly K, Riley J, Zaitsev S, Cines DB, Higazi AAR, Muzykantov VR: RBC-coupled tPA prevents whereas tPA aggravates JNK MAPK mediated impairment of ATP and Ca sensitive K channel mediated cerebrovasodilation after cerebral photothrombosis. Translational Stroke Research 3: 114-121, 2012.
Armstead WM, Riley J, Cines DB, Higazi AAR: Combination therapy with glucagon and a novel plasminogen activator inhibitor-1 derived peptide enhances protection against cerebrovasodilation during hypotension after traumatic brain injury through inhibition of ERK and JNK MAPK. Neurological Research 34: 530-537, 2012.
Armstead WM, Ganguly K, Riley J, Kiessling JW, Cines DB, Higazi AAR, Zaitsev S, Muzykantov VR: RBC-coupled tPA prevents impairment of cerebral vasodilatory responses through inhibition of JNK and potentiation of p38 MAPK after cerebral photo thrombosis in the newborn pig. Ped Crit Care Med
1231: 369-375, 2011.
back to top
Last updated: 05/11/2016
The Trustees of the University of Pennsylvania