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Curriculum Vitae

Peter A. Walker, M.D., F.A.C.S.

PRESENT TITLE:

Assistant Professor of Surgery

Associate Program Director, Minimally Invasive Surgery Fellowship

ADDRESS:

University of Texas Medical School at Houston

Department of Surgery, Division of Elective General Surgery

6431 Fannin Street, MSB 4.156

Houston, TX 77030

CITIZENSHIP:

United States of America

UNDERGRADUATE EDUCATION:

1998 -2002

University of Missouri

Columbia, MO

Chemical Engineering Magna Cum Laude

GRADUATE EDUCATION:

2002-2006

Saint Louis University School of Medicine

St. Louis, MO - MD

POST-GRADUATE TRAINING AND FELLOWSHIP APPOINTMENTS:

2006-2013

University of Texas Medical School at Houston

General Surgery Residency Program

Chairman: Richard J. Andrassy, MD

Program Director: John R. Potts, III, MD

2008-2010

University of Texas Medical School at Houston

Department of Pediatric Surgery

NIH T32 Research Fellowship

Mentor: Charles S. Cox, Jr, MD

2013-2014

University of Texas Medical School at Houston

Minimally Invasive/Robotic Surgery Fellowship Program

Chairman: Richard J. Andrassy, MD

Program Director: Erik B. Wilson, MD

ACADEMIC APPOINTMENTS:

2013-2014

Clinical Instructor

Department of Surgery

Division of Elective General Surgery

University of Texas Medical School at Houston

Houston, TX

2014-Present

Assistant Professor of Surgery

Department of Surgery

Division of Elective General Surgery

University of Texas Medical School at Houston

HOSPITAL APPOINTMENTS:

2013-Present

2013-Present

2013-Present

2014-Present

2014-Present

2014-Present

Pending

Memorial Hermann – Texas Medical Center

Harris Health – Lyndon Baines Johnson (LBJ) General Hospital

Houston Hospital for Specialized Surgery

Memorial Hermann Sugar Land Hospital

Memorial Hermann Southwest Hospital

Memorial Hermann Katy Hospital

Houston Methodist Sugar Land Hospital

LICENSURE:

Texas Medical Board – N1212 (Active)

Controlled Substances Registration, Texas Department of Public Safety (Active)

Controlled Substances Registration, Drug Enforcement Administration (Active)

CERTIFICATION:

Advanced Cardiac Life Support

Advanced Trauma Life Support

Fundamentals of Laparoscopic Surgery (2012)

American Board of Surgery (2014) - Certificate #058988

National Board of Medical Examiners (USMLE Step 1, 2CK, 2CS, 3)

PROFESSIONAL ORGANIZATIONS:

Alpha Omega Alpha Medical Honor Society

Associate Fellow, American College of Surgeons

Association for Academic Surgeons

South Texas Chapter, American College of Surgeons

Harris County Medical Society

Texas Medical Association

HONORS/AWARDS:

Resident Award for Outstanding Research Project (First Place) South Texas Chapter, American College of Surgeons, 2009 Annual Meeting 2/21/2009

Resident Award for Outstanding Research Project (First Place) South Texas Chapter, American College of Surgeons, 2010 Annual Meeting 2/26/2010

First place, Surgical Jeopardy University of Texas Medical School at Houston (Peter Walker and Tsuyoshi Kaneko) South Texas Chapter, American College of Surgeons, 2010 Annual Meeting 2/26/2010

Resident Award for Outstanding Research Project (Second Place) South Texas Chapter, American College of Surgeons, 2011 Annual Meeting 2/26/2011

Alpha Omega Alpha Medical Honor Society, Delta Chapter, February 2012

EDITORIAL POSITIONS:

2009 - 2011: Ad hoc reviewer for Tissue Engineering

2011: Ad hoc reviewer for British Medical Bulletin

2012: Associate editorial board for American Journal of Stem Cells

SERVICE ON UNIVERSITY OF TEXAS MEDICAL SCHOOL AT HOUSTON COMMITTEES:

2008-2009

2012-2013

Educational Advisory Committee, Department of Surgery

Educational Advisory Committee, Department of Surgery

MENTORSHIP OF UNDERGRADUATE STUDENTS:

  1. Huram Mok (2009, STEP-UP Clinical and Research Internship); Project: Autologous mononuclear progenitor cell injection for traumatic brain injury: the effect of injury cavity volume on potential neuroprotection.
  2. Brooke Huffsmith (2009, Summer Medical Student Research Program); Project: Autologous mononuclear progenitor cell injection for traumatic brain injury: the effect of injury cavity volume on potential neuroprotection.

PAST GRANT SUPPORT:

  1. BD Biosciences, Inc (2010); Project: T regulatory cells as a therapeutic target for progenitor cells in traumatic brain injury (TBI). Co-investigators: Peter A. Walker, MD, Fernando Jimenez, MS, Shinil K. Shah, DO, and Charles S. Cox, Jr., MD

PUBLICATIONS:

ABSTRACTS:

Local/Regional

  1. Walker PA, Harting MT, Pati S, Jimenez F, Dash PK, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Implications for intracranial inflammation depending upon timing, delivery, and target cell type. Mission Connect Symposium, Houston, TX. December 8, 2008.
  2. Walker PA, Jimenez F, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Effect of serum osmolarity on progenitor cell viability and pro-inflammatory cytokine production. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 21, 2009.
  3. Mok H, Huffsmith BA, Walker PA, Gill BS, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury (TBI). The University of Texas MD Anderson Cancer Center Step Up 2009 Research Symposium, Houston, TX. July 31, 2009.
  4. Shah SK, Jimenez F, Walker PA, Xue H, Aroom KR, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. Peritoneal fluid (PF) from an animal model of abdominal compartment syndrome (ACS) induces priming of naïve polymorphonuclear leukocytes (PMNs). South Texas Chapter, American College of Surgeons Research Symposium, Austin, TX. February 25-27, 2010.
  5. Walker PA, Jimenez F, Shah SK, Huffsmith BS, Dash PK, Cox CS Jr. Autologous mononuclear progenitor cell injection for traumatic brain injury (TBI): the effect of injury cavity volume on potential neuroprotection. South Texas Chapter, American College of Surgeons Research Symposium, Austin, TX. February 26, 2010.
  6. Walker PA, Jimenez F, Shah SK, Xue H, Hamilton JA, Mays RW, Deans R, Pati S, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Modulation of the resident neuronal macrophage population. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 26, 2011.
  7. Shah SK, Cox CS Jr, Xue H, Aroom KR, Walker PA, Gill BS, Jimenez F, Moore-Olufemi SD. Non-occlusive mesenteric hypertension: Elucidating the pathophysiology of gastroschisis-related intestinal dysfunction. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 24-26, 2011.
  8. Liao GP, Hetz RA, Walker PA, Shah SK, Jimenez F, Kosmach S, Day MC, Lee DA, Worth LL, Cox CS. Autologous bone marrow mononuclear cells reduce therapeutic intensity for severe traumatic brain injury in children. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 20-22, 2014

National

  1. Radhakrishnan RS, Shah SK, Lance SH, Radhakrishnan HR, Xue H, Radhakrishnan GL, Ramaswamy US, Walker PA, Uray KS, Cox CS Jr. Hypertonic saline alters hydraulic permeability and upregulates aquaporin 4. The 4th Annual Academic Surgical Congress, Fort Myers, FL. February 3-6, 2009. Journal of Surgical Research 2009, 151(2): 215.
  2. Walker PA, Jimenez F, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Effect of serum osmolarity on progenitor cell viability and pro-inflammatory cytokine production. Shock Society, San Antonio, TX. June 6-9, 2009. Shock 2009; 31(7) Suppl 1: 86.
  3. Walker PA, Harting MT, Jimenez F, Pati S, Dash PK, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury increases pro-inflammatory cytokine production via NFkB activation independent of the PI3 kinase pathway. The 95th Annual Clinical Congress, American College of Surgeons, Chicago, IL. October 11-15, 2009. Journal of the American College of Surgeons 2009; 191(4); Supplement 1; Page S85.
  4. Cox CS, Baumgartner JE, Worth L, Harting MT, Ewing-Cobbs L, Gee A, Hasan K, Shah S, Walker P, Day M. Phase 1 clinical trial of autologous bone marrow mononuclear cells for pediatric severe traumatic brain injury. 2009 Annual Meeting, Congress of Neurosurgical Surgeons, New Orleans, LA. October 24-29, 2009. Neurosurgery 2009; 65(2): 412.
  5. Walker PA, Jimenez F, Shah SK, Huffsmith BS, Dash PK, Cox CS Jr. Autologous mononuclear progenitor cell injection for traumatic brain injury (TBI): The effect of injury cavity volume on potential neuroprotection. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 3-5, 2010. Journal of Surgical Research 2010; 158(2): 378-9.
  6. Walker PA, Jimenez F, Aroom KR, Gill BS, Savitz SI, Cox CS Jr. Effect of needle diameter and flow rate on mesenchymal stromal cell (MSC) cell characterization and viability. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 3-5, 2010. Journal of Surgical Research 2010; 158(2): 382.
  7. Walker PA, Wang YX, Shah SK, Jimenez F, Cox CS Jr, Hayes-Jordan A. Mesenchymal stem cell treatment reduces tumor growth and pulmonary metastasis in Ewing's sarcoma. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 3-5, 2010. Journal of Surgical Research 2010; 158(2): 400.
  8. Shah SK, Jimenez F, Walker PA, Xue H, Aroom KR, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. Peritoneal fluid primes naïve neutrophils in an animal model of abdominal compartment syndrome. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 3-5, 2010. Journal of Surgical Research 2010; 158(2): 293.
  9. Shah SK, Jimenez F, Walker PA, Xue H, Uray KS, Aroom KR, Fischer UM, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. A novel physiologic model for the study of abdominal compartment syndrome (ACS). The 5th Annual Academic Surgical Congress, San Antonio, TX. February 3-5, 2010. Journal of Surgical Research 2010; 158(2): 423.
  10. Walker PA, Shah SK, Jimenez F, Pati S, Dash PK, Cox CS Jr. Autologous bone marrow mononuclear cell injection offers neuroprotection after traumatic brain injury (TBI) in a rodent model. The 8th Annual Meeting, International Society of Stem Cell Research, San Francisco, CA. June 16 – 19, 2010.
  11. Pati S, Gerber MH, Jimenez F, Walker PA, Cox CS Jr, Dash PK, Holcomb J. Systemic effects of human mesenchymal stem cells on vascular permeability and angiogenesis are mediated by cell to cell contact through modulation of the ve cadherin-beta-catenin signaling pathway. The 8th Annual Meeting, International Society of Stem Cell Research, San Francisco, CA. June 16 – 19, 2010.
  12. Shah SK, Moore-Olufemi SD, Uray KS, Jimenez F, Walker PA, Xue H, Stewart RH, Laine GA, Cox CS Jr. A novel murine model for the study of edema-induced intestinal contractile dysfunction. 2010 Joint International Meeting in Neurogastroenterology and Motility, Boston, MA. August 26-29, 2010. Neurogastroenterology and Motility 2010; 22(S1): 28.
  13. Moore-Olufemi SD, Shah SK, Xue H, Jimenez F, Walker P, Cox CS Jr. A novel postnatal animal model to study gastroschisis-related gut dysfunction. 2010 Joint International Meeting in Neurogastroenterology and Motility, Boston, MA. August 26-29, 2010. Neurogastroenterology and Motility 2010; 22(S1): 88.
  14. Walker PA, Jimenez F, Shah SK, Gerber MH, Xue H, Mays RW, Deans R, Pati S, Dash PK, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Preserving the blood brain barrier via an interaction with splenocytes. The 96th Annual Clinical Congress, American College of Surgeons, Washington, DC. October 3-7. 2010. Journal of the American College of Surgeons 2010; 311(3S): S94.
  15. Shah SK, Cox CS Jr, Xue H, Jimenez F, Walker PA, Moore-Olufemi SD. Gastroschisis-related intestinal dysfunction: development and characterization of a novel postnatal rat model. The 96th Annual Clinical Congress, American College of Surgeons, Washington DC. October 3-7, 2010. Journal of the American College of Surgeons 2010; 311(3S): S69.
  16. Shah SK, Jimenez F, Walker PA, Xue H, Feeley TD, Uray KS, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. Peritoneal fluid as a novel mechanism for neutrophil priming in a clinically relevant model of intra-abdominal sepsis. The 96th Annual Clinical Congress, American College of Surgeons, Washington, DC. October 3-7. 2010. Journal of the American College of Surgeons 2010; 311(3S): S43.
  17. Cox CS, Walker PA, Shah SK, Jimenez F, Pati S, Dash PK, Mays PW, Deans R, Xue H, Bedi S. Migroglial phenotype modulation after TBI via progenitor cell:splenocyte interactions. 2010 Annual Meeting of The Society of Leukocyte Biology and The International Endotoxin and Innate Immunity Society, Vancover, BC, Canada. October 7-9, 2010.
  18. Shah S, Jimenez F, Walker P, Xue H, Uray K, Norbury K, Stewart R, Laine G, Cox C Jr. Evaluating the effects of immediate application of negative pressure therapy after decompression from abdominal compartment syndrome: a pre-clinical study. 40th Critical Care Congress, Society of Critical Care Medicine, San Diego, CA. January 15-19, 2011. Critical Care Medicine 2010; 38 (12 Supplement): 199.
  19. Shah S, Jimenez F, Walker P, Xue H, Uray K, Norbury K, Stewart R, Laine G, Cox C Jr. Effect of early negative pressure therapy (NPT) on pro-inflammatory characteristics of peritoneal fluid (PF) and plasma in abdominal compartment syndrome (ACS). 40th Critical Care Congress, Society of Critical Care Medicine, San Diego, CA. January 15-19, 2011. Critical Care Medicine 2010; 28 (12 Supplement): 200.
  20. Shah SK, Cox CS Jr, Xue H, Aroom KR, Walker PA, Gill BS, Jimenez F, Moore-Olufemi SD. Non-occlusive mesenteric hypertension: Elucidating the pathophysiology of gastroschisis-related intestinal dysfunction. The 6th Annual Academic Surgical Congress, Huntington Beach, CA. February 1-3, 2011. Journal of Surgical Research 2011; 165(2): 180.
  21. Walker PA, Jimenez F, Shah SK, Xue H, Hamilton JA, Mays RW, Deans R, Pati S, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Modulation of the resident neuronal macrophage population. The 6th Annual Academic Surgical Congress, Huntington Beach, CA. February 1-3, 2011. Journal of Surgical Research 2011; 165(2): 206.
  22. Norbury KC, Shah SK, Jimenez F, Walker PA, Uray KS, Cox CS Jr. Using flow cytometry to measure signaling by peripheral blood leukocytes through CD11b/CD18 receptors during sepsis in a porcine model. 31st Annual Meeting of the Surgical Infection Society, Palm Beach, FL. May 11-14, 2011. Surgical Infections 2011; 12 (Supplement 1): S68.
  23. Bedi S, Walker P, Shah S, Jimenez F, Smith P, Hamilton J, Mays R, Pati S, Dash P, Cox C. Multipotent adult progenitor cell therapy for traumatic brain injury: modulation of microglia. National Neurotrauma Symposium 2011, July 10-13, 2011, Ft Lauderdale, FL. Journal of Neurotrauma 2011; 28(6): A110.
  24. Letourneau PA, Shah SK, Jimenez F, Walker PA, Wade CE, Pati S, Holcomb JB, Cox CS Jr. Stored plasma is associated with enhanced priming of naive neutrophils. The 7th Annual Academic Surgical Congress, Las Vegas, NV. February 14-16, 2012. Journal of Surgical Research 2012; 172(2): 327.
  25. Hetz RA, Bedi SS, Walker PA, Shah SK, Jimenez F, Thomas CP, Smith P, Pati S, Dash P, Cox CS Jr. Autologous cellular therapy for traumatic brain injury: mechanism of action. The 98th Annual Clinical Congress, American College of Surgeons, Chicago, IL. September 30-October 4, 2012. Journal of the American College of Surgeons 2012; 215(3): S53.
  26. Bedi SS, Walker P, Shah S, Jimenez F, Thomas C, Smith P, Hetz R, Hamilton J, Mays RW, Cox CS. Multipotent adult progenitor cell therapy for traumatic brain injury: systemic modulation of microglia. Congress of Neurological Surgeons 2012 Annual Meeting, Chicago, IL. October 6-10, 2012. Neurosurgery 2012; 71(2): E544.
  27. Walker P, Mehta S, Snyder B, Wilson E, Wilson, T. Endoscopic retrieval of obstructive gastric bands: A developing institutional experience. 18th World Congress of International Federation for the Surgery of Obesity and Metabolic Disorders, Istanbul, Turkey. August 28-31, 2013. Obesity Surgery 2013; 23: 1023.
  28. Shah SK, Walker PA, Mehta SS, Wilson EB, Patel MK, Gregoric ID, Nathan SS, Bajwa KS. The "sleeve of life": First report of concurrent laparoscopic sleeve gastrectomy (LSG) and left ventricular assist device (LVAD) placement as a bridge to heart transplant for morbidly obese patients. Internal Federation for the Surgery of Obesity and Metabolic Disorders 2014 World Congress, Montreal, Canada, August 26-30, 2014. Obesity Surgery 2014; 24(8): 1277.
  29. Walker PA, Shah SK, Agarwal AK, Wilson EB, Bajwa KS, Mehta SS. Unusual complications of retained adjustable gastric band (AGB) tubing. Internal Federation for the Surgery of Obesity and Metabolic Disorders 2014 World Congress, Montreal, Canada, August 26-30, 2014. Obesity Surgery 2014; Obesity Surgery 2014; 24(8): 1277.
  30. Walker PA, Shah SK, Agarwal AK, Wilson EB, Snyder BE. Endoscopic removal of an eroded adjustable gastric band (AGB) in a pregnant patient: report of technique. Internal Federation for the Surgery of Obesity and Metabolic Disorders 2014 World Congress, Montreal, Canada, August 26-30, 2014. Obesity Surgery 2014; 24(8): 1179.
  31. Liao GP, Hetz RA, Walker PA, Shah SK, Jimenez F, Kosmach S, Day MC, Lee DA, Worth LL, Cox CS. Autologous bone marrow mononuclear cells reduce therapeutic intensity for severe traumatic brain injury in children. Clinical Congress 2014, American College of Surgeons, Chicago, IL. October 26-30, 2014. Journal of the American College of Surgeons 2014; 219(3 Supplement): S136.
  32. Shah SK, Walker PA, Levy SM, Mehta SS, Snyder BE, Wilson TD, Bajwa KS, Wilson EB. Totally robotic repair of a large paraesophageal hernia with Toupet fundoplication. 6th Annual Clinical Robotic Surgery Association Worldwide Congress, San Francisco, CA, Oct 23-25, 2014. (Video)

PEER REVIEWED:

ORIGINAL CONTRIBUTIONS:

  1. Harting MT, Cox CS Jr, Day MC, Walker P, Gee A, Brenneman M, Grotta J, Savitz S. 2009. Bone marrow derived mononuclear cell populations in pediatric and adult patients. Cytotherapy. 11(4):480-4.
  2. Radhakrishnan RS, Shah SK, Lance SH, Radhakrishnan HR, Hasen X, Radhakrishnan GL, Ramaswamy US, Walker PA, Uray KS, Laine GA, Stewart RH, Cox CS Jr. 2009. Hypertonic saline alters hydraulic conductivity and upregulates mucosal/submucosal aquaporin 4 in resuscitation induced intestinal edema. Critical Care Medicine. 37(11):2946-52.
  3. Walker PA, Harting MT, Jimenez F, Shah SK, Pati S, Dash PK, Cox, CS Jr. 2010. Direct intrathecal implantation of mesenchymal stromal cells leads to enhanced neuroprotection via an NFκB mediated increase in Interleukin 6 (IL-6) production. Stem Cells and Development. 19(6):867-76.
  4. Shah SK, Jimenez F, Walker PA, Xue H, Uray KS, Aroom KR, Fischer UW, Laine GA, Stewart RH, Norbory KC, Cox CS Jr. 2010. A novel physiologic model for the study of abdominal compartment syndrome. J Trauma. 68(3):682-9.
  5. Walker PA, Jimenez F, Cox CS Jr. 2010. Progenitor cell therapy for traumatic brain injury (TBI): Effect of serum osmolarity on cell viability and cytokine production. Regenerative Medicine. 5(1):65-71.
  6. Shah SK, Fogle LN, Aroom KR, Gill BS, Moore-Olufemi SD, Jimenez F, Uray KS, Walker PA, Stewart RH, Laine GA, Cox CS Jr. 2010. Hydrostatic intestinal edema induced signaling pathways: potential role of mechanical forces. Surgery. 147(6):772-9.
  7. Walker P, Jimenez F, Gerber M, Aroom K, Shah SK, Harting MT, Gill BS, Savitz S, Cox CS Jr. 2010. Effect of needle diameter and flow rate on mesenchymal stromal cell (MSC) characterization and viability. Tissue Engineering Part C Methods. 16(5):989-97.
  8. El-Khoury R, Misra V, Sharma S, Cox CS Jr, Walker PA, Grotta JC, Gee A, Suziki S, Savitz SI. 2010. The effect of transcatheter injections on cell viability and cytokine release of mononuclear cells. American Journal of Neuroradiology. 31(8):1488-92.
  9. Shah SK, Xue H, Jimenez F, Kots AY, Choi BK, Uray KS, Walker PA, Moore-Olufemi SD, Velez N, Stewart RH, Laine GA, Cox CS Jr. 2010. Evaluating the potential role of nitric oxide as a mediator of hydrostatic edema mediated intestinal contractile dysfunction. Journal of Surgical Research. 163(1): 102-9.
  10. Shah SK, Moore-Olufemi SD, Uray KS, Jimenez F, Walker PA, Xue H, Stewart RH, Laine GA, Cox CS Jr. 2010. A murine model for the study of edema induced intestinal contractile dysfunction. Neurogastroenterology and Motility. 22(10): 1132-e290.
  11. Walker PA, Shah SK, Jimenez F, Gerber MH, Xue H, Mays RW, Deans R, Pati S, Dash PK, Cox CS Jr. 2010. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Preserving the blood brain barrier via an interaction with splenocytes. Experimental Neurology. 225(2): 341-52.
  12. Shah SK, Jimenez F, Walker PA, Aroom KR, Xue H, Feeley TD, Uray KS, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. 2010. A novel mechanism for neutrophil priming in trauma: potential role of peritoneal fluid. Surgery. 148(2): 263-270.
  13. Pati S, Gerber M, Menge T, Wataha K, Zhao Y, Baumgartner A, Zhao J, Letourneau P, Huby M, Salbury J, Baer L, Kozar R, Wade C, Walker PA, Dash PK, Cox CS Jr, Holcomb JB. 2011. Bone marrow derived mesenchymal stem cells inhibit inflammation and preserve vascular endothelial integrity in the lungs after hemorrhagic shock. Plos One. 6(9):e25171.
  14. Uray KS, Shah SK, Radhakrishnan RS, Jimenez F, Walker PA, Stewart RH, Laine GA, Cox CS Jr. 2011. Sodium hydrogen exchanger as a mediator of hydrostatic edema induced intestinal contractile dysfunction. Surgery. 149(1): 114-25.
  15. Cox CS Jr, Baumgartner JE, Harting MT, Worth L, Walker PA, Shah SK, Ewing-Cobbs L, Hasen K, Day MC, Lee D, Jimenez F, Gee A. 2011. Phase I clinical trial of autologous bone marrow mononuclear cells for severe traumatic brain injury in children. Neurosurgery. 68(3): 588-600.
  16. Shah SK, Jimenez F, Walker PA, Xue H, Feeley TD, Uray KS, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. 2012. Peritoneal fluid: A potential mechanism of systemic neutrophil priming in experimental intra-abdominal sepsis. American Journal of Surgery. 203(2): 211-6.
  17. Shah SK, Jimenez F, Walker PA, Xue H, Uray KS, Norbury KC, Stewart RH, Laine GA, Cox CS Jr. 2012. Evaluating the effects of immediate application of negative pressure therapy after decompression from abdominal compartment syndrome: a pre-clinical study. European Journal of Trauma and Emergency Surgery 38(1): 65-73.
  18. Walker PA, Shah SK, Jimenez F, Aroom KR, Harting MT, Cox CS Jr. 2012. Cytokine and growth factor production after progenitor cell therapy for traumatic brain injury is secondary to non-neurologic interactions: An alternative mechanism of action. Surgery. 152(5):790-3.
  19. Shah SK, Aroom KR, Walker PA, Xue H, Jimenez F, Gill BS, Cox CS, Jr, Moore-Olufemi SD. 2012. Effects of non-occlusive mesenteric hypertension on intestinal function: Implications for gastroschisis-related intestinal dysfunction. Pediatric Research. 71(6):668-74.
  20. Walker PA*, Bedi S*, Shah SK, Jimenez F, Xue H, Hamilton JA, Smith P, Thomas CP, Mays RW, Pati S, Cox CS Jr. 2012. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Modulation of the resident neuronal macrophage population. J Neuroinflammation. 9(1):228. *indicating equal contribution and designation as co first authors.
  21. Bedi SS*, Walker PA*, Shah SK, Jimenez F, Thomas CP, Smith P, Xue H, Pati S, Dash PK, Cox CS Jr. 2013. Autologous bone marrow mononuclear cell therapy attenuates the pro-inflammatory microglial response and improves spatial learning after traumatic brain injury. Journal of Trauma and Acute Care Surgery. 75(3):410-6. *indicating equal contribution and designation as co first authors.
  22. Hayes-Jordan A, Wang Y, Walker PA, Cox CS. 2014. Mesenchymal stromal cell dependent regression of pulmonary metastasis from Ewing's Sarcoma. Frontiers Medicine. In Press.
  23. Liao GP, Harting MT, Hetz RA, Walker PA, Shah SK, Corkins CJ, Jimenez F, Kosmach SC, Day MC, Tsao K, Lee DA, Worth LL, Cox CS Jr. Autologous bone marrow mononuclear cells reduce therapeutic intensity for severe traumatic brain injury in children. Pediatric Critical Care Medicine 2014; In Press.

Review Papers/Monographs

  1. Walker PA, Shah SK, Harting MT, Cox CS Jr. 2009. Adult progenitor cell therapies for traumatic brain injury: Barriers and opportunities in translation. Disease Models and Mechanisms. 2(1-2):23-38.
  2. Walker PA, Aroom K, Jimenez F, Shah SK, Harting MT, Gill BS, Cox CS Jr. 2009. Advances in progenitor cell therapy using scaffolding constructs for central nervous system injury. Stem Cell Reviews and Reports. 5(3):283-300.
  3. Walker PA, Harting MT, Baumgartner JE, Fletcher S, Strobel N, Cox CS Jr. 2009. Modern approaches to pediatric brain injury therapy. Journal of Trauma. 67(2 supp):S120-7.
  4. Walker PA, Harting MT, Shah SK, Cox CS Jr. 2010. Current trends in cell therapy for pediatric acquired brain injury. Minerva Pediatrica. 62(1):91-106.
  5. Walker PA, Harting MT, Shah SK, Day MC, El Khoury R, Savitz SI, Baumgartner J, Cox CS Jr. 2010. Progenitor cell therapy for the treatment of central nervous system injury: a review of the state of current clinical trials. Stem Cells International. 2010(Article ID 369578): Available at: http://www.sage-hindawi.com/journals/sci/2010/369578.html.
  6. Walker PA, Letourneau PA, Bedi S, Shah SK, Jimenez F, Cox CS Jr. 2011. Progenitor cells as remote "bioreactors": Neuroprotection via modulation of the systemic inflammatory response. World Journal of Stem Cells. 3(2): 9-18. Available at:http://www.wjgnet.com/1948-0210/pdf/v3/i2/9.pdf.
  7. Shah SK, Walker PA, Moore-Olufemi SD, Sundaresan A, Kulkarni AD, Andrassy RJ. 2011. An evidence based review of a Lentinula edodes mushroom extract as complementary therapy in the surgical oncology patient. Journal of Parenteral and Enteral Nutrition. 35(4):449-58.
  8. Walker PA, Shah SK, Cox CS Jr. 2011. Progenitor cell therapies as a novel treatment for traumatic brain injury: a pathway towards neuroprotection. Therapy. 8(5):507-09. Available at: http://www.futuremedicine.com/doi/full/10.2217/thy.11.55.
  9. Shah SK, Jimenez F, Letourneau PA, Walker PA, Moore-Olufemi SD, Stewart RH, Laine GA, Cox CS Jr. 2012. Strategies for modulating the inflammatory response after decompression from abdominal compartment syndrome. Scandinavian Journal of Trauma, Resuscitation, and Emergency Medicine 20(1):25.
  10. Shah SK, Allison ND, Tsao K, Walker PA. 2011. Evaluation of abdominal pain in children (monograph). BMJ Best Practice. www.bestpractice.bmj.com.

Case Reports

  1. Walker PA, Shah SK, Souchon EA, Millas SG. 2011. Biliary stent migration presenting as trans diverticular sigmoid perforation: case report of a rare occurrence. Journal of Surgical Case Reports. 3:6. Available at:http://jscr.co.uk/2011/03/colorectal-surgery/biliary-stent-migration-presenting-as-trans-divertic ular-sigmoid-perforation/.
  2. Shah SK, Kreiner LA, Walker PA, Klein KL, Bajwa KS, Robinson EK, Millas SG, Souchon EA, Wray CJ. 2012. Cytomegalovirus enteritis manifesting as recurrent bowel obstruction and jejunal perforation in a patient with AIDS: rare report of survival and review of the literature. Surgical Infections. 13(2):121-4.
  3. Shah SK, Walker PA, Khalil K, Irani A. 2012. Solitary fibrous tumor presenting as a pedunculated lung mass with associated lung atresia: Case report of a rare occurrence. Current Oncology. 19(3):e219-21.
  4. Walker PA, Shah SK, Letourneau PA, Allison ND, Cox CS Jr. 2013. Treatment of plastic bronchitis using serial flexible bronchoscopy and aerosolized heparin therapy. European Journal of Pediatric Surgery. 23(2):157-60.
  5. Shah SK, Walker PA, Fischer UM, Karanjawala BE, Khan SA. 2013. Bouveret syndrome. Journal of Gastrointestinal Surgery. 17(9):1720-1.
  6. Letourneau PA, Shah SK, Tchakarov A, Tanner AH, Hetz RA, Jani PP, Walker PA, Martinez EJ and Khan SA. 2013. Lactic acidosis, multi-organ failure, and pneumatosis: A rare presentation of lymphoma. Panamerican Journal of Trauma, Critical Care, and Emergency Surgery. 2(2):94-6.
  7. Martinez EJ, Shah SK, Walker PA, Fischer UM, Lesslie DP. 2014. More than just skin deep: An unusual cause of bowel perforation. The American Surgeon. 80(2):42-4.
  8. Stephens NA, Shah SK, Walker PA, Jayanty V, Raijman I, Khalil KK. 2014. Rare report of recurrent spontaneous esophageal dissection. Journal of the Society of Laparoendoscopic Surgeons. 18(2): 342-5.
  9. Yabar CS, Fischer UM, Tannous AE, Liao GP, Kreiner LA, Shah SK, Walker PA, Ko TC, Millas SG, Souchon EA, Kao LS. 2014. Survival with near total small intestinal loss associated with mesenteric vein thrombosis: a report of Prothrombin G20210A mutation. American Surgeon. 80(5): 147-49.
  10. Jacquez RA, Fischer UM, Yaakovian MD, Walker PA, Shah SK. 2014. Necrotizing fasciitis of the abdominal wall in a patient with diverticulitis. Panamerican Journal of Trauma, Critical Care, and Emergency Surgery. 3(1): 37-8.

Other

  1. Shah SK, Walker PA, Stephens NA, Harvin JA, Hetz RA, Fischer UM, Irani AD. 2014. Malignant eccrine spiradenoma metastatic to the lungs and pleura: report of a rare occurrence. Diagnostic Imaging/UBM Medica; (http://www.diagnosticimaging.com/case-studies/metastatic-eccrine-spiradenoma)
  2. Palmer PE, Desai NR, Walker PA, Fischer UM, Shah SK. 2014. An uncommon cause of abdominal pain. Diagnostic Imaging/UBM Medica; (http://www.diagnosticimaging.com/case-studies/epiploic-appendagitis)

Book Chapters

  1. Shah SK, Walker PA, Andrassy RJ. Chapter 72: Rhabdomyosarcoma. In: Holcomb GW, Murphy JP (eds) Pediatric Surgery, 5th edition, Elsevier, Philadelphia. 2010.
  2. Walker PA. Chapter 3: Stem cell delivery methods and routes. In: Cox CS Jr (ed) Progenitor Cell Therapy for Neurological Injury, 1st edition, Humana Press Inc, New York. 2011.
  3. Shah SK, Jimenez F, Walker PA. Chapter 4: Neural progenitor cells for traumatic brain and spinal cord injury: Endogenous cell rescue versus replacement mechanisms. In: Cox CS Jr (ed) Progenitor Cell Therapy for Neurological Injury, 1st edition, Humana Press Inc, New York. 2011.
  4. Walker PA, Allison ND. Chapter 5: Traumatic brain injury. Pathophysiology / models. In: Cox CS Jr (ed) Progenitor Cell Therapy for Neurological Injury, 1st edition, Humana Press Inc, New York. 2011.
  5. Walker PA, Shah SK, Baumgartner JE. Chapter 9: Current status of clinical trials using progenitor cells for neurological injury. In: Cox CS Jr (ed) Progenitor Cell Therapy for Neurological Injury, 1st edition, Humana Press Inc, New York. 2011.
  6. Shah SK, Walker PA, Snyder BE, Wilson EB. Chapter 6: Essentials and future directions of bariatric surgery. In: Kroh M, Chalikonda S (eds) Essentials of Robotic Surgery, Springer Science + Business Media, New York. In press.

POSTER PRESENTATIONS:

LOCAL/REGIONAL:

Local/Regional

  1. Walker PA, Harting MT, Pati S, Jimenez F, Dash PK, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Implications for intracranial inflammation depending upon timing, delivery, and target cell type. University of Texas Neuroscience Research Symposium, Houston, TX. December 6, 2008.
  2. Walker PA, Harting MT, Pati S, Jimenez F, Dash PK, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Implications for intracranial inflammation depending upon timing, delivery, and target cell type. Mission Connect Symposium, Houston, TX. December 8, 2008.
  3. Mok H, Huffsmith BA, Walker PA, Gill BS, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury (TBI). The University of Texas MD Anderson Cancer Center Step Up 2009 Research Symposium, Houston, TX. July 31, 2009.
  4. Huffsmith BA, Walker PA, Mok H, Cox CS Jr. Autologous mononuclear progenitor cell injection for traumatic brain injury: the effect of injury cavity volume on potential neuroprotection. Research Forum, University of Texas Medical School at Houston, Houston, TX. November 5, 2009.

National

  1. Walker PA, Jimenez F, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Effect of serum osmolarity on progenitor cell viability and pro-inflammatory cytokine production. Shock Society Research Symposium, San Antonio, TX. June 6-9, 2009.
  2. Walker PA, Shah SK, Jimenez F, Pati S, Dash PK, Cox CS Jr. Autologous bone marrow mononuclear cell injection offers neuroprotection after traumatic brain injury (TBI) in a rodent model. The 8th Annual Meeting, International Society of Stem Cell Research, San Francisco, CA. June 16 – 19, 2010.
  3. Pati S, Gerber MH, Jimenez F, Walker PA, Cox CS Jr, Dash PK, Holcomb J. Systemic effects of human mesenchymal stem cells on vascular permeability and angiogenesis are mediated by cell to cell contact through modulation of the ve cadherin-beta-catenin signaling pathway. The 8th Annual Meeting, International Society of Stem Cell Research, San Francisco, CA. June 16 – 19, 2010.
  4. Shah SK, Moore-Olufemi SD, Uray KS, Jimenez F, Walker PA, Xue H, Stewart RH, Laine, GA, Cox CS Jr. A novel murine model for the study of edema-induced intestinal contractile dysfunction. 2010 Joint International Meeting in Neurogastroenterology and Motility, Boston, MA. August 27-28, 2010.
  5. Moore-Olufemi SD, Shah SK, Xue H, Jimenez F, Walker P, Cox CS Jr. A novel postnatal animal model to study gastroschisis-related gut dysfunction. 2010 Joint International Meeting in Neurogastroenterology and Motility, Boston, MA. August 27-28, 2010.
  6. Shah S, Jimenez F, Walker P, Xue H, Uray K, Norbury K, Stewart R, Laine G, Cox C Jr. Evaluating the effects of immediate application of negative pressure therapy after decompression from abdominal compartment syndrome: a pre-clinical study. 40th Critical Care Congress, Society of Critical Care Medicine, San Diego, CA. January 15-19, 2011.
  7. Shah S, Jimenez F, Walker P, Xue H, Uray K, Norbury K, Stewart R, Laine G, Cox C Jr. Effect of early negative pressure therapy (NPT) on pro-inflammatory characteristics of peritoneal fluid (PF) and plasma in abdominal compartment syndrome (ACS). 40th Critical Care Congress, Society of Critical Care Medicine, San Diego, CA. January 15-19, 2011.
  8. Norbury KC, Shah SK, Jimenez F, Walker PA, Uray KS, Cox CS Jr. Using flow cytometry to measure signaling by peripheral blood leukocytes through CD11b/CD18 receptors during sepsis in a porcine model. 31st Annual Meeting of the Surgical Infection Society, Palm Beach, FL. May 11-14, 2011.
  9. Bedi S, Walker P, Shah S, Jimenez F, Smith P, Hamilton J, Mays R, Pati S, Dash P, Cox C. Multipotent adult progenitor cell therapy for traumatic brain injury: modulation of microglia. National Neurotrauma Symposium 2011, Ft Lauderdale, FL. July 11, 2011.
  10. Walker PA, Shah SK, Agarwal AK, Wilson EB, Bajwa KS, Mehta SS. Unusual complications of retained adjustable gastric band (AGB) tubing. Internal Federation for the Surgery of Obesity and Metabolic Disorders 2014 World Congress, Montreal, Canada, August 26-30, 2014.
  11. Walker PA, Shah SK, Agarwal AK, Wilson EB, Snyder BE. Endoscopic removal of an eroded adjustable gastric band (AGB) in a pregnant patient: report of technique. Internal Federation for the Surgery of Obesity and Metabolic Disorders 2014 World Congress, Montreal, Canada, August 26-30, 2014.

ORAL PRESENTATIONS:

LOCAL/REGIONAL:

  1. Walker PA. Routine versus selective intraoperative cholangiogram during laparoscopic cholecystectomy: a resident debate. Grand Rounds, Department of Surgery, University of Texas Medical School at Houston, Houston, TX. July 2007.
  2. Walker PA, Harting MT, Pati S, Jimenez F, Dash PK, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Implications for intracranial inflammation depending upon timing, delivery, and target cell type. Joint Regenerative Center Meeting, Departments of Pediatric Surgery, Neurosurgery, and Internal Medicine-Cardiology, University of Texas Medical School at Houston, Houston, TX. November 2, 2008.
  3. Walker PA, Jimenez F, Cox CS Jr. Mesenchymal stem cell therapy for traumatic brain injury: Effect of serum osmolarity on progenitor cell viability and pro-inflammatory cytokine production. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 21, 2009.
  4. Walker PA The potential role of mesenchymal stromal cells (MSCs) for the treatment of traumatic brain injury. Joint Regenerative Center Meeting, Departments of Pediatric Surgery, Neurosurgery, and Internal Medicine-Cardiology, University of Texas Medical School at Houston, Houston, TX. November 3, 2009.
  5. Walker PA, Jimenez F, Shah SK, Huffsmith BS, Dash PK, Cox CS Jr. Autologous mononuclear progenitor cell injection for traumatic brain injury (TBI): the effect of injury cavity volume on potential neuroprotection. South Texas Chapter, American College of Surgeons Research Symposium, Austin, TX. February 26, 2010.
  6. Walker PA, Harting MT, Shah SK, Jimenez F, Pati S, Dash PK, Cox CS Jr Mesenchymal stem cell therapy for traumatic brain injury offers neuroprotection via an NFkB mediated pathway. University of Texas Department of Surgery Resident Research Competition, Houston, TX. May 27, 2010.
  7. Walker PA. Progenitor cell therapy for traumatic brain injury: The evolving mechanism of neuroprotection. Grand Rounds, Department of Surgery, University of Texas Medical School Houston, TX. June 10, 2010.
  8. Walker PA, Jimenez F, Shah SK, Xue H, Hamilton JA, Mays RW, Deans R, Pati S, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Modulation of the resident neuronal macrophage population. South Texas Chapter, American College of Surgeons Research Symposium, Houston, TX. February 26, 2011.
  9. Walker PA. Bleeding blue: Review of inferior vena cava injury after penetrating trauma. Grand Rounds, Department of Cardiothoracic and Vascular Surgery, University of Texas Medical School at Houston, Houston, TX. July 2011.
  10. Walker PA. The evolution of inguinal hernia repair. Grand Rounds, Department of Surgery, University of Texas Medical School at Houston, Houston, TX. February 14, 2013.
  11. Walker PA. Progenitor cell therapy for traumatic brain injury. The 1st Annual Stanley J. Dudrick Lecture Series, Department of Surgery, University of Texas Medical School at Houston, Houston, TX. April 11, 2013.

National

  1. Walker PA, Harting MT, Jimenez F, Pati S, Dash PK, Cox CS Jr Mesenchymal stem cell therapy for traumatic brain injury offers neuroprotection via an NFkB mediated pathway. The 95th Annual Clinical Congress, American College of Surgeons, Chicago, IL. October 13, 2009.
  2. Walker PA, Jimenez F, Shah SK, Huffsmith BS, Dash PK, Cox CS Jr. Autologous mononuclear progenitor cell injection for traumatic brain injury (TBI): The effect of injury cavity volume on potential neuroprotection. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 5, 2010.
  3. Walker PA, Jimenez F, Aroom KR, Gill BS, Savitz SI, Cox CS Jr. Effect of needle diameter and flow rate on mesenchymal stromal cell (MSC) cell characterization and viability. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 5, 2010.
  4. Walker PA, Wang YX, Shah SK, Jimenez F, Cox CS Jr, Hayes-Jordan A. Mesenchymal stem cell treatment reduces tumor growth and pulmonary metastasis in Ewing's sarcoma. The 5th Annual Academic Surgical Congress, San Antonio, TX. February 5, 2010.
  5. Walker PA, Wang YX, Cox CS Jr, Hayes-Jordan A. Mesenchymal stem cells (MSCs) dependent regression of pulmonary metastasis is mediated by inhibition of platelet derived growth factor receptor-beta (PDGFR-β). The American Pediatric Surgery Association Annual Meeting, Orlando, FL. May 18, 2010.
  6. Walker PA, Jimenez F, Shah SK, Gerber MH, Mays RW, Deans R, Pati S, Dash PK, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Preserving the blood brain barrier via an interaction with splenocytes. The 96th Annual Clinical Congress, American College of Surgeons, Washington, DC. October 6. 2010.
  7. Walker PA, Jimenez F, Shah SK, Xue H, Hamilton JA, Mays RW, Deans R, Pati S, Cox CS Jr. Intravenous multipotent adult progenitor cell therapy for traumatic brain injury: Modulation of the resident neuronal macrophage population. The 6th Annual Academic Surgical Congress, Huntington Beach, CA. February 1, 2011.


Meet the Physicians
of UT MIST Center for Bariatric and Metabolic Surgery and UT COMMP!

The UT MIST/UT COMMP team includes board-certified surgeons and obesity medicine specialists who are among the most highly trained in the country. They offer the most advanced minimally invasive technologies and techniques available for weight loss surgery, and will work with you to provide the best possible care.