Researchers at UCD


Ulla Knaus

Full Professor of Immunobiology

School Of Medicine
Conway Institute
Dublin 4

Tel: +353 1 7166719


2008-present SFI Stokes Professor, Professor of Immunobiology, School of Medicine, Conway Institute
2009-present Adjunct Professor, Department of Immunology & Microbial Science, The Scripps Research Institute, La Jolla, CA, USA
2000-2008 Associate Professor, Department of Immunology & Microbial Science, The Scripps Research Institute
1994-2000 Assistant Professor, Department of Immunology, The Scripps Research Institute
1992-1993 Senior Research Associate, Department of Immunology, The Scripps Research Institute
1990-1992 Postdoctoral Research Fellow (DFG), Department of Immunology, The Scripps Research Institute, La Jolla, CA, USA
1985-1989 Ph.D., Institute of Pharmaceutical Biology, University of Munich, Germany
1984 Approbation as Pharmacist, Germany

1977-1983 School of Pharmacy, ETH Zürich, Switzerland

Research Interests

Innate and Mucosal Immune Response in Inflammation and Infection

NADPH Oxidases in Health and Disease

UCD Medicine Research Centre Paediatric Diseases


Honours and Awards

Year: 1990.
Title: Postdoctoral Fellowship
Year: 1992.
Title: Postdoctoral Fellowship
Year: 1992.
Title: Louis N. Katz Basic Science Award
Year: 1992.
Title: Finalist, Young Investigator Award


Association: Society for Free Radical Research, Function/Role: Member
Association: American Society for Biochemistry and Molecular Biology, Function/Role: Member

Conference Contributions

Knaus UG (2017) [Invited Oral Presentation], 18th International Congress of Mucosal Immunology, Washington, USA , 19-JUL-17 - 22-JUL-17.
Knaus UG (2017) [Invited Oral Presentation], Deutsche Pharmazeutische Gesellschaft, Saarbruecken, Germany , 04-MAY-17 - 05-MAY-17.
Knaus UG (2017) [Invited Lecture], Centennial Symposium Alberto Sols, Madrid, Spain , 20-FEB-17 - 21-FEB-17.
Knaus UG (2016) [Oral Presentation], COST action EU-ROS, Eilat, Israel , 07-NOV-16 - 10-NOV-16.
Knaus UG (2016) [Oral Presentation], Posttranslational Modifications in Bacteria, Lyon, France , 19-OCT-16 - 20-OCT-16.
Knaus UG (2016) [Oral Presentation], Redox World Congress, Paris, France , 13-JUN-16 - 15-JUN-16.
Knaus UG (2016) Gordon Research Conferences. [Conference Organising Committee Member], NOX family NADPH oxidases, Waterville Valley, NH, USA , 03-JUN-16 - 10-JUN-16.
Knaus, Ulla (2015) Genetic disorders coupled to ROS deficiency. [Oral Presentation], COST EU-ROS Training School, Alicante, Spain , 21-OCT-15 - 24-OCT-15.
Knaus, Ulla (2015) Structure and regulation of the DUOX/NOX family. [Oral Presentation], COST EU-ROS Training School, Alicante, Spain , 21-OCT-15 - 24-OCT-15.
Knaus, Ulla (2015) Redox balance in innate immunity. [Oral Presentation], ISCA Japan, Conference on Gene-Editing, Transgenics and Stem Cells: Frontiers in Medicine and Molecular Therapeutics, Dublin , 02-SEP-15 - 08-SEP-15.
Knaus UG (2012) International meeting. [Invited Oral Presentation], From molecular mechanisms to integrated life processes, Grenoble, France , 21-NOV-12 - 23-NOV-12.
Knaus UG (2012) International meeting. [Invited Oral Presentation], New concepts on the mechanisms of inflammation, autoimmunity and tumorigenesis, Kazan, Russia , 17-MAY-12 - 19-MAY-12.
Knaus, UG; (2010) Gordon Research Conference. [Invited Oral Presentation], NOX family NADPH oxidases, Les Diablerets , 06-JUN-10 - 11-JUN-10.
Knaus, UG; (2010) Symposium. [Invited Oral Presentation], Oxidases and Cell Signaling, Pittsburgh , 04-MAY-10 - 05-MAY-10.
Knaus, UG; (2009) Symposium. [Plenary Lecture], 40 years Pharmacy, Saarbruecken, Germany , 25-JUN-09 - 27-JUN-09.
Knaus, UG; (2008) Gordon Research Conference. [Chaired Session], NOX family NADPH oxidases, New London , 01-JUN-08 - 06-JUN-08.
Knaus, UG; (2008) European Society of Clinical Investigation. [Invited Oral Presentation], Phagocyte Workshop, Geneva, Switzerland , 26-MAR-08 - 29-MAR-08.
Knaus, UG; (2007) NIH/NIAID. [Invited Oral Presentation], Viral Immunity Workshop, Bethesda, Maryland , 27-NOV-07 - 28-NOV-07.
Knaus, UG; (2007) Gordon Research Conference. [Invited Oral Presentation], Phagocytes, Smithfield, RI , 10-JUN-07 - 15-JUN-07.
Knaus, UG; (2007) San Diego Signaling. [Conference Organising Committee Chairperson], Microbial Pathogenesis and Lung Host Defense, La Jolla, CA , 25-MAY-07 - 26-MAY-07.
Knaus, UG; (2006) The Banbury Center. [Invited Oral Presentation], Redox Regulation of Signal Transduction, Cold Spring Harbor , 03-DEC-06 - 06-DEC-06.
Knaus, UG; (2006) FASEB Summer Research Conference. [Oral Presentation], Regulation and Function of Small GTPases, Saxtons River, USA , 15-JUL-06 - 20-JUL-06.
Knaus, UG; (2006) Gordon Research Conference. [Invited Oral Presentation], NOX family NADPH oxidases, Les Diableret, Switzerland , 15-OCT-06 - 20-OCT-06.
Knaus, UG; (2006) German Heart Center. [Invited Oral Presentation], Microcirculation and Vascular Biology, Munich, Germany , 12-OCT-06 - 14-OCT-06.
Knaus, UG; (2006) Regional Center of Excellence. [Invited Oral Presentation], Pacific Southwest RCE meeting, University of Nevada, Reno , 24-JUL-06 - 25-JUL-06.
Knaus, UG; (2005) Society for Leukocyte Biology. [Invited Oral Presentation], Symposium Signaling in Innate Immunity, San Diego , 16-FEB-05 - 18-FEB-05.
Knaus, UG; (2004) Callaway Gardens. [Invited Oral Presentation], 2nd. Int. Conference on NADPH oxidases, Pine Mountain, Georgia , 11-APR-04 - 16-APR-04.


Committee : 2018 NOX NADPH oxidase family Gordon Research Conference
Committee : 2016 NOX NADPH oxidase family Gordon Research Conference
Committee : COST action EU-ROS
Committee : Irish Transgenic Network
Committee : UCD BMF committee

Journals Edited

Journal Of Biological Chemistry: Editor.

Other Activities

Review for funding agencies (NIH, European funding agencies) and journals



Strengert M, Knaus UG (2011) Analysis of epithelial barrier integrity in polarized lung epithelial cells. USA: Springer. [Details]
Ruse M, Knaus, UG; (2008) The role of small Rho GTPases in TLR signaling. Methods in Signal Transduction Series: CRC. [Details]
Knaus UG, Bamberg A, Bokoch GM; (2007) Rac and Rap GTPases activation assays. Methods Mol Biol: Springer. [Details]
King CC, Reilly AM, Knaus UG; (2000) Purification and in vitro activities of p21-activated kinases. Methods Enzymol: Elsevier Inc. [Details]
Knaus UG, Bokoch GM; (1995) Purification of Rac2 from human neutrophils. Methods Enzymol: Elsevier Inc. [Details]

Book Chapters

Jennings RT, Knaus UG (2014) 'Rho family and Rap GTPase activation assays' In: Quinn MT, DeLeo, FR (eds). Methods Mol Biol. New Yory: Humana Press. , pp.79-88 [Details]
Jennings RT, Knaus UG (2014) 'Neutrophil migration through extracellular matrix' In: Quinn MT, DeLeo, FR (eds). Methods Mol Biol. New York: Humana Press. , pp.209-218 [Details]

Peer Reviewed Journals

Singh AK, Hertzberger RY, Knaus UG (2018) 'Hydrogen peroxide production by lactobacilli promotes epithelial restitution during colitis'. Redox Biology, 16 :11-20. [DOI] [Details]
Cooke G, Kamal I, Strengert M, Hams E, Mawhinney L, Tynan A, O'Reilly C, O'Dwyer DN, Kunkel SL, Knaus UG, Shields DC, Moller DR, Bowie AG, Fallon PG, Hogaboam CM, Armstrong ME, Donnelly SC (2017) 'Toll-like receptor 3 L412F plymorphism promotes a persistent clinical phenotype in pulmonary sarcoidosis'. QJM : monthly journal of the Association of Physicians, . [DOI] [Details]
Schwerd T, Bryant RV, Pandey S, Capitani M, Meran L, Cazier J-B, Jung J, Mondal K, Parkes M, Mathew C, Fiedler K, McCarthy DJ, WGS500 Consortium, Oxford IBD cohort study investigators, COLORS in IBD, UK IBD Genetics Consortium, Sullivan P, Rodrigues A, Travis S, Moore C, Sambrook J, Ouwehand WH, Roberts DJ, Danesh J, INTERVAL Study, Russell RK, Wilson DC, Kelsen JR, Cornall R, Denson LA, Kugathasan S, Knaus UG, Goncalves Serra E, Anderson CA, Duerr RH, McGovern DPB, Cho J, Powrie F, Li VSW, Muise AM, Uhlig HH (2017) 'NOX1 loss-of-function genetic variants in patients with inflammatory bowel disease'. Mucosal Immunology, . [Details]
Parlato M, Charbit-Henrion F, Hayes P, et al. (2017) 'First identification of biallelic inherited DUOX2 inactivating mutations as a cause of very early onset inflammatory bowel disease'. Gastroenterology, . [DOI] [Details]
Egea J, Fabreget I, Frapart, YM et al. (2017) 'European contribution to the study of ROS: A summary of the findings and prospects for the future from the COST action BM1203 (EU-ROS)'. Redox Biology, . [DOI] [Details]
Stenke E, Bourke B, Knaus U (2017) 'Crohn's disease - moving away from the knife'. Frontiers, . [Details]
Knaus UG, Hertzberger R, Pircalabioru GG, Yousefi SP, Branco Dos Santos F (2017) 'Pathogen control at the intestinal mucosa - H2O2 to the rescue'. Gut Microbes, 8 (1):67-74. [DOI] [Details]
Aviello G, Knaus UG (2017) 'ROS in gastrointestinal inflammation:Rescue or Sabotage?'. British Journal of Pharmacology, 174 (12):1704-1718. [Details]
Zhdanov AV, Aviello G, Knaus UG, Papkovsky DB (2017) 'Cellular ROS imaging with hydro-Cy3 dye is strongly influenced by mitochondrial membrane potential'. Biochimica et biophysica acta, 1861 (2):198-204. [Details]
Alvarez,LA; Kovacic, L; Rodriguez, J; Gosemann, JH; Kubica, M; Pircalabioru, GG; Friedmacher, F; Cean, A; Ghise, A; Sarandan, MB; Puri, P; Daff, S; Plettner, E; von Kriegsheim, A; Bourke, B; Knaus, UG (2016) 'NADPH oxidase-derived H2O2 subverts pathogen signaling by oxidative phosphotyrosine conversion to PB-DOPA'. Proceedings of the National Academy of Sciences of the United States of America, 113 (37):10406-10411. [DOI] [Details]
Pircalabioru G,Aviello G, Kubica M, Zhdanov A, Paclet MH, Brennan L, Hertzberger R, Papkovsky D, Bourke B, Knaus UG (2016) 'Defensive mutualism rescues NADPH oxidase inactivation in gut infection'. Cell Host and Microbe, 19 (5):651-663. [DOI] [Details]
Kim HJ, Magesh V, Lee JJ, Kim S, Knaus UG, Lee KJ (2015) 'Ubiquitin C-terminal hydrolase-L1 increases cancer cell invasion by modulating hydrogen peroxide generated via NADPH oxidase 4'. Oncotarget, 6 (18):16287-16303. [DOI] [Details]
O'Neill S, Brault J;Stasia MJ;Knaus UG (2015) 'Genetic disorders coupled to ROS deficiency'. Redox Biology, 6 :135-156. [DOI] [Details]
Hayes P, Dhillon S, O'Neill K et al (2015) 'Defects in NADPH oxidase genes NOX1 and DUOX2 in very early onset inflammatory bowel disease'. Cellular and molecular gastroenterology and hepatology, 1 (5):489-502. [DOI] [Details]
Mikhed Y, Gorlach A, Knaus UG, Daiber A (2015) 'Redox regulation of genome stability by effects on gene expression, epigenetic pathways and DNA damage/repair'. Redox Biology, 5 :275-289. [DOI] [Details]
Jennings RT, Strengert M, Hayes P, El-Benna J, Brakebusch C, Kubica M, Knaus UG (2014) 'RhoA determines disease progression by controlling neutrophil motility and restricting hyperresponsiveness'. Blood, 123 (23):3635-3645. [DOI] [Details]
Jennings RT, Knaus UG (2014) 'Neutrophil migration through extracellular matrix'. Methods in molecular biology (Clifton, N.J.), 1124 :209-218. [DOI] [Details]
Jennings RT, Knaus UG (2014) 'Rho family and Rap GTPase activation assays'. Methods in molecular biology (Clifton, N.J.), 1124 :79-88. [DOI] [Details]
Koenigs V, Jennings R, Vogl T, Horsthemke M, Bachg AC, Xu Y, Grobe K, Brakebusch C, Schwab A, Baehler M, Knaus UG, Hanley PJ (2014) 'Mouse macrophages completely lacking Rho (RhoA, RhoB and RhoC) have severe lamellipodial retraction defects, but robust chemotactic navigation and increased motility'. Journal of Biological Chemistry, . [DOI] [Details]
Strengert M, Jennings R, Davanture S, Hayes P, Gabriel G, Knaus UG (2014) 'Mucosal reactive oxygen species are required for antiviral response: Role of Duox in Influenza A virus infection'. Antioxidants and Redox Signaling, 20 (17):2695-2709. [DOI] [Details]
Alvarez LA, Bourke B, Pircalabioru G, Georgiev AY, Knaus UG, Daff S, Corcionivoschi N. (2013) 'Cj 1411c encodes for a cytochrome P450 involved in Campylobacter jejuni 81-176 pathogenicity'. PLoS ONE, 8 (9):e75534. [DOI] [Details]
Hayes P, Knaus UG (2013) 'Balancing reactive oxygen species in the epigenome: NADPH oxidases as target and perpetrator'. Antioxidants and Redox Signaling, 18 (15):1937-1945. [DOI] [Details]
Corcionivoschi N, Alvarez LA, Sharp TH, Strengert M, Alemka A, Mantell J, Verkade P, Knaus UG, Bourke B (2012) 'Mucosal reactive oxygen species decrease virulence by disrupting Campylobacter jejuni phosphotyrosine signaling'. Cell Host and Microbe, 12 (1):47-59. [DOI] [Details]
Munson, JM, Fried, L, Rowson, SA, Bonner, MY, Karumbaiah, L, Diaz, B, Courtneidge, SA, Knaus, UG, Brat, DJ, Arbiser, JL, Bellamkonda, RV (2012) 'Anti-invasive adjuvant therapy with imipramine blue enhances chemotherapeutic efficacy against glioma'. Science Translational Medicine, 4 (127):127ra36. [DOI] [Details]
Von Loehneysen, K, Noack, D, Hayes, P, Friedman, JS, Knaus, UG (2012) 'Constitutive NADPH oxidase 4 activity resides in the composition of the B-loop and the penultimate C terminus'. Journal of Biological Chemistry, 287 (12):8737-8745. [Details]
Ghosh CC, Mukherjee A, David S, Knaus UG, Stearns-Kurosawa DJ, Kurosawa S, Parikh SM. (2012) 'Impaired function of the Tie-2 receptor contributes to vascular leakage and lethality in anthrax'. Proceedings of the National Academy of Sciences of the United States of America, 109 (25):10024-10029. [DOI] [Details]
Al Ghouleh, I, Khoo, NK, Knaus, UG, Griendling, KK, Touyz, RM, Thannickal, VJ, Barchowsky, A, Nauseef, WM, Kelley, EE, Bauer, PM, Darley-Usmar, V, Shiva, S., Cifuentes-Pagano, E, Freeman, BA, Gladwin, MT, Pagano, PJ (2011) 'Oxidases and peroxidases in cardiovascular and lung disease:new concepts in reactive oxygen species signaling'. Free Radical Biology and Medicine, . [Details]
Strengert M, Knaus UG (2011) 'Analysis of epithelial barrier integrity in polarized lung epithelial cells'. Methods in molecular biology (Clifton, N.J.), 763 :195-206. [DOI] [Details]
von Lohneysen, K,Noack, D,Wood, MR,Friedman, JS,Knaus, UG; (2010) 'Structural Insights into Nox4 and Nox2: Motifs Involved in Function and Cellular Localization'. Molecular and Cellular Biology, 30 :961-975. [DOI] [Details]
Bhandarkar SS, Jaconi M, Fried LE, Bonner MY et al.; (2009) 'Fulvene-5 potently inhibits NADPH oxidase 4 and blocks the growth of endothelial tumors in mice'. J Clin Invest, 119 (8):2359-2365. [Details]
Manukyan M, Nalbant P, Luxen S, Hahn K, Knaus UG; (2009) 'RhoA GTPase activation by TLR2 and TLR3 ligands: connecting via Src to NF-kB'. J IMMUNOL, 182 (6):3522-3529. [Details]
Sylvia Luxen, Deborah Noack, Monika Frausto, Suzel Davanture, Bruce E. Torbett and Ulla G. Knaus; (2009) 'Heterodimerization controls localization of Duox-DuoxA NADPH oxidases in airway cells'. J Cell Sci, 122 :1238-1247. [Details]
Mandy Lehmann, Deborah Noack, Malcolm Wood, Marta Perego, Ulla G Knaus; (2009) 'Lung Epithelial Injury by B. Anthracis Lethal Toxin Is Caused by MKK-Dependent Loss of Cytoskeletal Integrity'. Plos One, 4 (3):e4755. [Details]
von Lohneysen K, Noack D, Jesaitis AJ, Dinauer MC, Knaus UG; (2008) 'Mutational analysis reveals distinct features of the Nox4-p22phox complex'. J BIOL CHEM, . [Details]
Maroto B, Ye MB, von Lohneysen K, Schnelzer A, Knaus UG; (2008) 'p21-activated kinase is required for mitotic progression and regulates Plk1'. Oncogene, 27 (36):4900-4908. [Details]
Luxen S, Belinsky SA, Knaus UG; (2008) 'Silencing of DUOX NADPH oxidases by promoter hypermethylation in lung cancer'. Cancer Research, 68 (4):1037-1045. [Details]
Lozano E, Frasa MA, Smolarczyk K, Knaus UG, Braga VM; (2008) 'PAK is required for the disruption of E-cadherin adhesion by the small GTPase Rac'. J Cell Sci, 121 (Pt7):933-938. [Details]
Pacquelet S, Lehmann M, Luxen S, Regazzoni K, Frausto M, Noack D, Knaus UG; (2008) 'Inhibitory action of NoxA1 on dual oxidase activity in airway cells'. J BIOL CHEM, 283 (36):24649-24658. [Details]
Kim JS, Diebold BA, Babior BM, Knaus UG, Bokoch GM; (2007) 'Regulation of Nox1 activity via protein kinase A-mediated phosphorylation of NoxA1 and 14-3-3 binding'. J BIOL CHEM, 282 (48):34787-34800. [Details]
Lombardo E, Alvarez-Barrientos A, Maroto B, Bosca L, Knaus UG; (2007) 'TLR4-mediated survival of macrophages is MyD88-dependent and requires TNF-alpha autocrine signaling'. J IMMUNOL, 178 (6):3731-3739. [Details]
Zhu Y, Marchal CC, Casbon AJ, Stull N, von Lohneysen K, Knaus UG, Jesaitis AJ, McCormick S, Nauseef WM, Dinauer MC; (2006) 'Deletion mutagenesis of p22phox subunit of flavocytochrome b558: identification of regions critical for gp91phox maturation and NADPH oxidase activity'. J BIOL CHEM, 281 (41):30336-30346. [Details]
Martyn KD, Frederick LM, von Lohneysen K, Dinauer MC, Knaus UG; (2006) 'Functional analysis of Nox4 reveals unique characteristics compared to other NADPH oxidases'. Cell Signal, 18 (1):69-82. [Details]
Ruse M, Knaus, UG; (2006) 'New players in TLR-mediated innate immunity: PI3K and small Rho GTPases'. Immunol Res, 34 (1):33-48. [Details]
Perry BN, Govindarajan B, Bhandarkar SS, Knaus UG, Valo M, Sturk C, Carillo CO, Sohn A, Cerimele F, Dumont D, Losken A, Willimas J, Brown LF, Tan X, Ioffe E, Yancopoulos GD, Arbiser JL; (2006) 'Pharmacologic blockade of angiopoietin-2 is efficacious against model hemangiomas in mice'. J Invest Dermatol, 126 (10):2316-2322. [Details]
Kravchenko VV, Kaufmann GF, Mathison JC, Scott DA, Katz AZ, Wood MR, Brogan AP, Lehmann M, Mee JM, Iwata K, Pan Q, Fearns C, Knaus UG, Meijler MM, Janda KD, Ulevitch RJ; (2006) 'N-(3-oxo-acyl) homoserine lactones signal cell activation through a mechanisms distinct from the canonical pathogen-associated molecular pattern recognition receptor pathways'. J BIOL CHEM, 281 (39):28822-28830. [Details]
Martyn KD, Kim MJ, Quinn MT, Dinauer MC, Knaus UG; (2005) 'p21-activated kinase (Pak) regulates NADPH oxidase activation in human neutrophils'. Blood, 106 (12):3962-3969. [Details]
Yamauchi A, Marchal CC, Molitoris J, Pech N, Knaus U, Towe J, Atkinson SJ, Dinauer MC; (2005) 'Rac GTPase isoform-specific regulation of NADPH oxidase and chemotaxis in murine neutrophils in vivo'. J BIOL CHEM, 280 (2):953-964. [Details]
Chan AY, Coniglio SJ, Chuang YY, Michaelson D, Knaus UG, Philips MR, Symons M; (2005) 'Roles of the Rac1 and Rac3 GTPases in human tumor cell invasion'. Oncogene, 24 (53):7821-7829. [Details]
Teusch N, Lombardo E, Eddleston J, Knaus UG; (2004) 'The low molecular weight GTPase RhoA and atypical protein kinase Czeta are required for TLR2-mediated gene transcription'. J IMMUNOL, 173 (1):507-514. [Details]
Shalom-Barak T, Knaus UG; (2002) 'A p21-activated kinase-controlled metabolic switch up-regulates phagocytic NADPH oxidase'. J BIOL CHEM, 277 (43):40659-40665. [Details]
Price MO, Atkinson SJ, Knaus UG, Dinauer MC; (2002) 'Rac activation induces NADPH oxidase activity in transgenic COSphox cells, and the level of superoxide production is exchange factor-dependent'. J BIOL CHEM, 277 (21):19220-19228. [Details]
Price MO, McPhail LC, Lambeth JD, Han CH, Knaus UG, Dinauer MC; (2002) 'Creation of a genetic system for analysis of the phagocyte respiratory burst: high-level reconstitution of the NADPH oxidase in a nonhematopoietic system'. Blood, 99 (8):2653-2661. [Details]
Mira JP, Benard V, Groffen J, Sanders LC, Knaus UG; (2000) 'Endogenous, hyperactive Rac3 controls proliferation of breast cancer cells by a p21-activated kinase-dependent pathway'. PNAS, 97 (1):185-189. [Details]
Knaus UG; (2000) 'Rho GTPase signaling in inflammation and transformation'. Immunol Res, 21 (2-3):103-109. [Details]
Wen Y, Gu J, Knaus UG, Thomas L, Gonzales N, Nadler JL; (2000) 'Evidence that 12-lipoxygenase product 12-hydroxyeicosatetranoic acid activates p21-activated kinase'. Biochem J, 349 (Pt2):481-487. [Details]
Schnelzer A, Prechtel D, Knaus U, Dehne K, Gerhard M, Graeff H, Harbeck N, Schmitt M, Lengyel E; (2000) 'Rac1 in human breast cancer: overexpression, mutation analysis, and characterization of a new isoform, Rac1b'. Oncogene, 19 (26):3013-3020. [Details]
Arbibe L, Mira JP, Teusch N, Kline L, Guha M, Mackman N, Godowski PJ, Ulevitch RJ, Knaus UG; (2000) 'Toll-like receptor2-mediated NF-kappaB activation requires a Rac1-dependent pathway'. Nat Immunol, 1 (6):533-540. [Details]
Fazal N, Knaus UG, Sabeh F, Gamelli RL, McNulty JA, Sayeed MM; (1999) 'Enhanced expression of neutrophil NADPH oxidase components in intestine of rats after burn injury'. Shock, 12 (6):438-442. [Details]
Brzeska H, Young R, Knaus UG, Korn ED; (1999) 'Myosin I heavy chain kinase: cloning of the full-length gene and acidic lipid-dependent activation by Rac and Cdc42'. PNAS, 96 (2):394-399. [Details]
Lopes LR, Hoyal CR, Knaus UG, Babior BM; (1999) 'Activation of the leukocyte NADPH oxidase by protein kinase C in a partially recombinant cell-free system'. J BIOL CHEM, 274 (22):15533-15537. [Details]
Knaus Ug, Wang Y, Reilly AM, Warnock D, Jackson JH; (1998) 'Structural requirements for PAK activation by Rac GTPases'. J BIOL CHEM, 273 (34):21512-21518. [Details]
Bokoch GM, Reilly AM, Daniels RH, King CC, Olivera A, Spiegel S, Knaus UG; (1998) 'A GTPase-independent mechanism of p21-activated kinase activation. Regulation by sphingosine and other biologically active lipids'. J BIOL CHEM, 273 (14):8137-8144. [Details]
Jones SL, Knaus UG, Bokoch GM, Brown EJ; (1998) 'Two signaling mechanisms for activation of alphaM beta2 avidity in polymorphonuclear neutrophils'. J BIOL CHEM, 273 (17):10556-10566. [Details]
Sells MA, Knaus UG, Bagrodia S, Ambrose DM, Bokoch GM, Chernoff J; (1997) 'Human p21-activated kinase (Pak1) regulates actin organization in mammalian cells'. Current Biology, 7 (3):202-210. [Details]
Brzeska H, Knaus UG, Wang ZY, Bokoch GM, Korn ED; (1997) 'p21-activated kinase has substrate specificity similar to Acanthamoeba myosin I heavy chain kinase and activates Acanthamoeba myosin I'. PNAS, 94 (4):1092-1095. [Details]
Bokoch GM, Wang Y, Bohl BP, Sells MA, Quilliam LA, Knaus UG; (1996) 'Interaction of the Nck adapter protein with p21-activated kinase (PAK1)'. J BIOL CHEM, 271 (42):25746-25749. [Details]
Bokoch GM, Vlahos CJ, Wang Y, Knaus UG, Traynor-Kaplan AE; (1996) 'Rac GTPase interacts specifically with phosphatidylinositol 3-kinase'. Biochem J, 315 (Pt3):775-779. [Details]
Ding J, Knaus UG, Lian JP, Bokoch GM, Badwey JA; (1996) 'The renaturable 69 and 63-kDa protein kinases that undergo rapid activation in chemoattractant-stimulated guinea pig neutrophils are p21-activated kinases'. J BIOL CHEM, 271 (40):24869-24873. [Details]
Knaus UG, Wagner H; (1996) 'Effects of boswellic acid of Boswellia serrata and other triterpenic acids on the complement system'. Phytomedicine, 3 :77-81. [Details]
Zhang S, Han J, Sells MA, Chernoff J, Knaus UG, Ulevitch RJ, Bokoch GM; (1995) 'Rho family GTPases regulate p38 mitogen-activated protein kinase through the downstream mediator Pak1'. J BIOL CHEM, 270 (41):23934-23936. [Details]
Knaus UG, Morris S, Dong HJ, Chernoff J, Bokoch GM; (1995) 'Regulation of human leukocyte p21-activated kinases through G protein-coupled receptors'. Science, 269 (5221):221-223. [Details]
Chuang TH, Xu X, Knaus UG, Hart MJ, Bokoch GM; (1993) 'GDP dissociation inhibitor prevents intrinsic and GTPase activating protein-stimulated GTP hydrolysis by the Rac GTP-binding protein'. J BIOL CHEM, 268 (2):775-778. [Details]
Heyworth PG, Knaus UG, Settleman J, Curnutte JT, Bokoch GM; (1993) 'Regulation of NADPH oxidase activity by Rac GTPase activating protein(s)'. Mol Biol Cell, 4 (11):1217-1223. [Details]
Heyworth PG, Knaus UG, Xu X, Uhlinger DJ, Conroy L, Bokoch GM, Curnutte JT; (1993) 'Requirement for posttranslational processing of Rac GTP-binding proteins for activation of human neutrophil  NADPH oxidase'. Mol Biol Cell, 4 (3):261-269. [Details]
Knaus, UG, Heyworth, PG, Kinsella, BT, Curnutte, JT, Bokoch, GM, ; (1992) 'Purification and characterization of Rac2 - a cytosolic GTP-binding protein that regulates human neutrophil NADPH oxidase'. J BIOL CHEM, 267 (33):23575-23582. [Details]
Puhlmann J, Knaus U, Tubaro A, Schaefer W, Wagner H; (1992) 'Immunologically active metallic ion-containing polysaccharides of Achyrocline Satureioides'. Phytochemistry, 31 :2617-2621. [Details]
Knaus UG, Heyworth PG, Evans T, Curnutte JT, Bokoch GM; (1991) 'Regulation of phagocyte oxygen radical production by the GTP-binding protein Rac2'. Science, 254 (5037):1512-1515. [Details]
Knaus UG, Wagner H; (1988) 'Effects of various polysaccharides on the complement system'. Planta Medica, 54 :565-566. [Details]
Wagner H, Fessler B, Knaus UG, Wierer N; (1987) 'Zum Wirknachweis antiphlogistischer wirksamer Arzneidrogen'. Zeitschrift fuer Phytotherapie, 8 :135-140. [Details]

Other Journals

Ruse M, Knaus UG; (2006) 'Where do viruses meet their match and who is coming to the reception? Insights into dsRNA-dependent signaling pathways mediated by Toll-like receptor3' Cell Science Reviews 3 (2) :15-20. [Details]
Bokoch GM, Knaus UG; (2003) 'NADPH oxidases:not just for leukocytes anymore!' Trends Biochem Sci 28 (9) :502-508. [Details]
Knaus UG, Bokoch GM; (1998) 'The p21Rac/Cdc42-activated kinases (PAKs)' Int J Biochem Cell Biol 30 (8) :857-862. [Details]
Bokoch GM, Knaus UG; (1994) 'The role of small GTP-binding proteins in leukocyte function' Curr Opin Immunol 6 (1) :98-105. [Details]
Bokoch GM, Knaus UG; (1994) 'Ras-related GTP-binding proteins and leukocyte signal transduction' Curr Opin Hematol 1 (1) :53-60. [Details]


Research Interests

Innate immune cells and mucosal barrier tissues are the first line of defense in the fight against invading pathogens. Our group focuses on understanding molecular mechanisms that innate and mucosal immune host defense use to protect the host from microbial insult, and how some responses wind up damaging the host. Second messengers such as reactive oxygen species (ROS) or nitric oxide that are produced during infection can have beneficial as well as detrimental effects. The overall outcome depends on precise spatial and temporal regulation of these second messengers by the affected cell populations. The intracellular signaling pathways that regulate the production of these molecules constitute an ideal target for intervention in disease. Our laboratory employs structure-function studies, modelling, functional evaluation of clinical mutants and inhibitor design/validation to gain knowledge for targeting NADPH oxidases in disease.

NADPH oxidases are an integral and crucial component of the protective host response in bacterial, fungal and viral infections. We are interested in the role of reactive oxygen species in the mutualistic interactions between mucosal epithelia, immune cells, commensals and pathogens. Using ex vivo and in vivo approaches we study the influence of pathogens, bacteria-derived ligands and toxins on the host and vice versa. NADPH oxidases can serve as compartmentalized signaling modules, thereby activating or inhibiting signaling cascades, as host defense mechanism, or as pro-inflammatory triggers. Elucidating physiological stimuli and control mechanisms for these enzymes will help defining the biological functions of oxidases in health and disease, and constitutes a prerequisite for therapeutic intervention in oxidant-induced damage and tissue injury.

A new concept of pathogen control are host cell-mediated changes in pathogen virulence. Reactive oxygen species such as H2O2 can derive from activated host cell NADPH oxidases or commensals such as lactobacilli. Long range signaling by H2O2 released into the gut lumen attenuates virulence, for example by disabling the bacterial phosphotyrosine network or by altering Type III Secretion Systems. We focus on molecular mechanisms that determine the outcome of a pathogen's interaction with the host organism, and how early intervention may ameliorate infection and inflammation. The laboratory uses state-of-the-art techniques in neutrophil/macrophage biology, mucosal barrier defense, microbiology and animal models.

Research Projects

Sponsor : Science Foundation Ireland (SFI)
Title : Impact of ROS on intestinal health in inflammatory bowel disease
Start Date / End Date : 01-OCT-17 / 01-OCT-22
Sponsor : National Children's Research Centre, Our Lady's Children's Hospital, Crumlin (CRC)
Title : Towards targeting NOX4 for intestinal fibrosis in Crohn¿s disease
Start Date / End Date : 01-JAN-17 / 30-DEC-19
Sponsor : Health Research Board (HRB)
Title : Towards personalised therapy in stricturing Crohn¿s disease- exploring and exploiting the role of NADPH oxidase in intestinal fibrosis
Start Date / End Date : 05-SEP-16 / 04-SEP-19
Sponsor : National Children's Research Centre, Our Lady's Children's Hospital, Crumlin (CRC)
Title : Reactive oxygen species targeting the bacterial phosphotyrosine network as defence strategy against mucosal pathogens
Start Date / End Date : 01-JAN-13 / 30-SEP-17
Sponsor : Science Foundation Ireland (SFI)
Title : ROS Signalling in the Lung - Control Mechanisms and Functional Consequences
Start Date / End Date : 01-MAR-11 / 31-AUG-17
Sponsor : Science Foundation Ireland (SFI)
Title : Stokes Professorship 2007
Start Date / End Date : 01-OCT-08 / 30-SEP-13

Recent Postgraduates

Nicole Teusch, PhD

Mandy Lehmann PhD

Sylvia Luxen PhD

Monika Strengert PhD

Richard Jennings PhD

Gratiela Pircalabioru PhD

Sharon O'Neill, PhD

Current Postgraduate Students

Emily Stenke, Doctor of Philosophy (PhD)   -   Thesis Supervisor