Dr Frederick Walker

Work Phone	(02) 4921 5012
Fax	(02) 4921 5141
Email	Rohan.Walker@newcastle.edu.au
Office	MS413, Medical Sciences

Highlighted Publications

Year	Citation	Nova
2011	Hinwood Madeleine, Tynan Ross, Day Trevor Anthony, Walker Frederick Rohan, 'Repeated social defeat selectively increases DeltaFosB expression and histone H3 acetylation in the infralimbic medial prefrontal cortex', Cerebral Cortex, 21 262-271 (2011) [C1]
2010	Tynan Ross, Naicker Sundresan, Hinwood Madeleine, Nalivaiko Eugene, Buller Kathryn M, Pow David V, Day Trevor Anthony, Walker Frederick Rohan, 'Chronic stress alters the density and morphology of microglia in a subset of stress-responsive brain regions', Brain Behavior and Immunity, 24 1058-1068 (2010) [C1]

Publications

For items published while at an institution other that the University of Newcastle, details are shown in italics.

Click on a category title below to expand the list of citations for that specific category.

Chapters In A Book (1 outputs)

Chapter in A1 Book (B1) (1 outputs)

Year	Citation	Nova
2012	Day Trevor Anthony, Walker Frederick Rohan, 'An introduction to the neurobiology of emotions and social behavior', The Mouse Nervous System, Academic Press, San Diego, 719-725 (2012) [B1]

Journal Articles (31 outputs)

Refereed Article in a Scholarly Journal (C1) (27 outputs)

Year	Citation	Nova
2012	Barreto Rafael De Araujo, Walker Frederick Rohan, Dunkley Peter Robert, Day Trevor Anthony, Smith Douglas William, 'Fluoxetine prevents development of an early stress-related molecular signature in the rat infralimbic medial prefrontal cortex. Implications for depression?', BMC Neuroscience, 13 1-12 (2012) [C1]
2012	Beynon S B, Walker Frederick Rohan, 'Microglial activation in the injured and healthy brain: What are we really talking about? Practical and theoretical issues associated with the measurement of changes in microglial morphology', Neuroscience, 225 162-171 (2012) [C1]
2012	Hinwood Madeleine, Morandini J, Day Trevor Anthony, Walker Frederick Rohan, 'Evidence that microglia mediate the neurobiological effects of chronic psychological stress on the medial prefrontal cortex', Cerebral Cortex, 22 1442-1454 (2012) [C1]
2012	Sominsky Bar Luba, Walker Adam Keith, Ong Lin Kooi, Tynan Ross, Walker Frederick Rohan, Hodgson Deborah Maree, 'Increased microglial activation in the rat brain following neonatal exposure to a bacterial mimetic', Behavioural Brain Research, 226 351-356 (2012) [C1]
2012	Tynan Ross, Weidenhofer Judith Clare, Hinwood Madeleine, Cairns Murray John, Day Trevor Anthony, Walker Frederick Rohan, 'A comparative examination of the anti-inflammatory effects of SSRI and SNRI antidepressants on LPS stimulated microglia', Brain Behavior and Immunity, 26 469-479 (2012) [C1]
2011	Beig Mirza Irfan, Callister Robin, Saint David A, Bondarenko Eugene, Walker Frederick Rohan, Day Trevor Anthony, Nalivaiko Eugene, 'Voluntary exercise does not affect stress-induced tachycardia, but improves resistance to cardiac arrhythmias in rats', Clinical and Experimental Pharmacology and Physiology, 38 19-26 (2011) [C1]
2011	Carnevali Luca, Bondarenko Evgeny, Sgoifo Andrea, Walker Frederick Rohan, Head Geoffrey A, Lukoshkova Elena V, Day Trevor Anthony, Nalivaiko Eugene, 'Metyrapone and fluoxetine suppress enduring behavioral but not cardiac effects of subchronic stress in rats', American Journal of Physiology-Regulatory Integrative and Comparative Physiology, 301 R1123-R1131 (2011) [C1]
2011	Hinwood Madeleine, Tynan Ross, Day Trevor Anthony, Walker Frederick Rohan, 'Repeated social defeat selectively increases DeltaFosB expression and histone H3 acetylation in the infralimbic medial prefrontal cortex', Cerebral Cortex, 21 262-271 (2011) [C1]
2011	Ong Lin Kooi, Bobrovskaya Larisa, Walker Frederick Rohan, Day Trevor Anthony, Dickson Phillip Wesley, Dunkley Peter Robert, 'The effect of social defeat on tyrosine hydroxylase phosphorylation in the rat brain and adrenal gland', Neurochemical Research, 36 27-33 (2011) [C1]
2010	Hodyl Nicolette A, Walker Frederick Rohan, Krivanek Klara, Clifton Vicki L, Hodgson Deborah Maree, 'Prenatal endotoxin exposure alters behavioural pain responses to lipopolysaccharide in adult offspring', Physiology & Behavior, 100 143-147 (2010) [C1]
2010	Kabir Muammar M, Beig Mirza Irfan, Baumert Mathias, Trombini Mimosa, Mastorci Francesca, Sgoifo Andrea, Walker Frederick Rohan, Day Trevor Anthony, Nalivaiko Eugene, 'Respiratory pattern in awake rats: Effects of motor activity and of alerting stimuli', Physiology and Behavior, 101 22-31 (2010) [C1]
2010	Mackenzie Lisa Jane, Nalivaiko Eugene, Beig Mirza Irfan, Day Trevor Anthony, Walker Frederick Rohan, 'Ability of predator odour exposure to elicit conditioned versus sensitised post traumatic stress disorder-like behaviours, and forebrain δFosB expression, in rats', Neuroscience, 169 733-742 (2010) [C1]
2010	Tynan Ross, Naicker Sundresan, Hinwood Madeleine, Nalivaiko Eugene, Buller Kathryn M, Pow David V, Day Trevor Anthony, Walker Frederick Rohan, 'Chronic stress alters the density and morphology of microglia in a subset of stress-responsive brain regions', Brain Behavior and Immunity, 24 1058-1068 (2010) [C1]
2009	Beig Mirza Irfan, Baumert M, Walker Frederick Rohan, Day Trevor Anthony, Nalivaiko Eugene, 'Blockade of 5-HT2A receptors suppresses hyperthermic but not cardiovascular responses to psychosocial stress in rats', Neuroscience, 159 1185-1191 (2009) [C1]
2009	Walker Frederick Rohan, Hodyl Nicolette A, Hodgson Deborah Maree, 'Neonatal bacterial endotoxin challenge interacts with stress in the adult male rat to modify KLH specific antibody production but not KLH stimulated ex vivo cytokine release', Journal of Neuroimmunology, 207 57-65 (2009) [C1]
2009	Walker Frederick Rohan, Masters Louise Marie, Dielenberg Robert, Day Trevor Anthony, 'Coping with defeat: Acute glucocorticoid and forebrain responses to social defeat vary with defeat episode behaviour', Neuroscience, 162 244-253 (2009) [C1]
2009	Walker Frederick Rohan, Naicker Sundresan, Hinwood Madeleine, Dunn Nicole, Day Trevor Anthony, 'Strain differences in coping behaviour, novelty seeking behaviour, and susceptibility to socially conditioned fear: A comparison between Wistar and Sprague Dawley rats', Stress: The International Journal on the Biology of Stress, 12 507-516 (2009) [C1]
2008	Walker Frederick Rohan, Hinwood Madeleine, Masters Louise Marie, Dielenberg Robert, Day Trevor Anthony, 'Individual differences predict susceptibility to conditioned fear arising from psychosocial trauma', Journal of Psychiatric Research, 42 371-383 (2008) [C1]
2008	Walker Frederick Rohan, Knott Brendon Gregory, Hodgson Deborah Maree, 'Neonatal endotoxin exposure modifies the acoustic startle response and circulating levels of corticosterone in the adult rat but only following acute stress', Journal of Psychiatric Research, 42 1094-1103 (2008) [C1]
2007	Day Trevor Anthony, Walker Frederick Rohan, 'More appraisal please: A commentary on Pfaff et al. (2007) 'Relations between mechanisms of CNS arousal and mechanisms of stress'', Stress: The International Journal on the Biology of Stress, 10 311-313 (2007) [C1]
2007	Hodyl Nicolette Anne, Walker Frederick Rohan, Krivanek Klara, Clifton Vicki Lee, Hodgson Deborah Maree, 'Modelling prenatal bacterial infection: Functional consequences of altered hypothalamic pituitary adrenal axis development', Behavioral Brain Research, 178 108-114 (2007) [C1]
2006	Walker Frederick Rohan, Hodyl Nicolette Anne, Krivanek Klara, Hodgson Deborah Maree, 'Early life host-bacteria relations and development: Long-term individual differences in neuroimmune function following neonatal endotoxin challenge', Physiology & Behavior, 87 126-134 (2006) [C1]
2006	Walker Frederick Rohan, Hodyl Nicolette Anne, Krivanek Klara, Hodgson Deborah Maree, 'Early life host-bacteria relations and development: long-term individual differences in neuroimmune function following neonatal endotoxin challenge', Physiology & Behavior, 87 126-134 (2006) [C1]
2006	Walker Frederick Rohan, Owens J, Ali S, Hodgson Deborah Maree, 'Individual differences in glucose homeostasis: Do our early life interactions with bacteria matter?', Brain Behavior and Immunity, 20 401-409 (2006) [C1]
2004	Walker Frederick Rohan, Brogan Antonia Elizabeth, Smith Roger, Hodgson Deborah Maree, 'A profile of the immediate endocrine, metabolic and behavioural responses following a dual exposure to endotoxin in early life', Physiology & Behavior, 83 495-504 (2004) [C1]
2004	Walker Frederick Rohan, March James Richard, Hodgson Deborah Maree, 'Endotoxin exposure in early life alters the development of anxiety-like behaviour in the Fischer 344 rat', Behavioural Brain Research, 154 63-69 (2004) [C1]
2001	Hodgson Deborah Maree, Knott Brendon Gregory, Walker Frederick Rohan, 'Neonatal Endotoxin Exposure Influences HPA Responsivity and Impairs Tumour Immunity in Fischer 344 Rats in Adulthood', Pediatric Research, 50:6 750-755 (2001) [C1]

Non Refereed Article in a Professional Journal (C3) (3 outputs)

Year	Citation	Nova
2004	Hodyl Nicolette Anne, Walker Frederick Rohan, Mears Cristina Erin Pritchard, Hume Kylie Ann, Hodgson Deborah Maree, 'Prenatal exposure to endotoxin in the Fischer 344 rat: consequences for neuroendocrine and immune function, and nocieptive thresholds in the offspring', Brian, Behavior, and Immunity, 18 CD (2004) [C3]
2004	Walker Frederick Rohan, Hodgson Deborah Maree, 'Interactions between the newborn and the early life microbial environment alter the development of anxiety-like behaviour in the Fischer 344 Rat', Australian Journal of Psychology, 56 232 (2004) [C3]
2004	Walker Frederick Rohan, Hodyl Nicolette Anne, Hodgson Deborah Maree, 'The effect of postnatal endotoxin exposure on nociception in adulthood: hyper-analgesia following immune challenge', Brain, Behavior, and Immunity, 18 CD (2004) [C3]

Other Refereed Contribution to a Scholarly Journal (C5) (1 outputs)

Year	Citation	Nova
2003	Hodyl Nicolette Anne, Walker Frederick Rohan, Hodgson Deborah Maree, 'Prenatal exposure to bacteria alters foetal hypothalamic-pituitary-adrenal development', Australian Journal of Psychology, 55 215 (2003) [C5]

Conference Publication (35 outputs)

Extract of Paper (E3) (35 outputs)

Year	Citation	Nova
2012	Walker Frederick Rohan, 'The role of microglia in the regulation of mood state and cognitive function', Abstracts of the 21st Annual Meeting of the International Behavioral Neuroscience Society, Kona, Hawaii (2012) [E3]
2012	Walker Frederick Rohan, Tynan Ross, Day Trevor Anthony, 'More than just reuptake inhibitors: A comparative examination of the antiinflammatory effects of SSRI and SNRI antidepressants on microglia', Abstracts. Australian Neuroscience Society 32nd Annual Meeting, Gold Coast, Queensland (2012) [E3]
2012	Walker Frederick Rohan, Tynan Ross, Hinwood Madeleine, Woodworth Sarah Beth, 'The role of microglia in cognitive disturbance: A new frontier in the neurobiology of stress', Brain, Behavior, and Immunity, San Diego, CA (2012) [E3]
2011	Barreto Rafael De Araujo, Walker Frederick Rohan, Dunkley Peter Robert, Day Trevor Anthony, Smith Douglas William, 'Alteration of neurotrophic factor pathway gene expression in the rat infralimbic medial prefrontal cortex by subchronic restraint stress is reversed by fluoxetine', Posters. Australian Neuroscience Society 31st Annual Meeting, Auckland, New Zealand (2011) [E3]
2011	Bondarenko Evgeny, Carnevali L, McPherson Angela Elizabeth, Walker Frederick Rohan, Day Trevor Anthony, Hodgson Deborah Maree, Nalivaiko Eugene, 'Respiratory, but not cardiac, responses to acoustic stimulation are attenuated by diazepam pre-treatment: A novel index of anxiety in rats', Oral abstracts. Australian Neuroscience Society Annual Meeting, Auckland, NZ (2011) [E3]
2011	Carnevali L, Bondarenko Evgeny, Sgoifo A, Walker Frederick Rohan, Day Trevor Anthony, Nalivaiko Eugene, 'Fluoxetine and metyrapone block behavioural but not cardiac effects of subchronic stress', Oral abstracts. Australian Neuroscience Society Annual Meeting, Auckland, NZ (2011) [E3]
2011	Sominsky Bar Luba, Walker Adam Keith, Ong Lin Kooi, Tynan Ross, Walker Frederick Rohan, Hodgson Deborah Maree, 'Epigenetic inheritance of anxiety-like behaviour in rats - Role of early life exposure to a bacterial mimetic', Journal of Developmental Origins of Health and Disease, Portland, Oregon (2011) [E3]
2011	Walker Frederick Rohan, Tynan R, Day Trevor Anthony, Ng A, Hinwood Madeleine, 'What have microglia got to do with it? New directions in the neurobiology of depression', Brain, Behavior, and Immunity, Chicago, Illinois (2011) [E3]
2010	Walker Frederick Rohan, 'The role of microglia in the regulation of mood state: Implications for depression', Proceedings of the Australasian Society for Psychiatric Research (ASPR) 2010 Conference, Sydney, NSW (2010) [E3]
2009	Ong Lin Kooi, Bobrovskaya Larisa, Walker Frederick Rohan, Day Trevor Anthony, Dickson Phillip Wesley, Dunkley Peter Robert, 'The effect of social conflict on tyrosine hydroxylase phosphorylation in catecholamine-producing cells from sprague-dawley rats', Journal of Neurochemistry, Busan, Korea (2009) [E3]
2009	Tynan Ross, Naicker Sundresan, Day Trevor Anthony, Walker Frederick Rohan, 'The impact of chronic restraint stress on regulating behavioural and glial changes in the adult rat', ANS 2009 Abstracts: Posters, Canberra, ACT (2009) [E3]
2007	Hinwood Madeleine, Walker Frederick Rohan, Day Trevor Anthony, 'Characterisation of fosB response in rat forebrain following exposure to chronic social stress (Poster)', 7th IBRO 2007 World Congress of Neuroscience Program, Melbourne (2007) [E3]
2007	Masters Louise Marie, Walker Frederick Rohan, Dielenberg Robert, Day Trevor Anthony, 'Psychosocial stress: individual differences in coping behaviour, hpa axis activation and limbic system activation patterns (Poster)', 7th IBRO 2007 World Congress of Neuroscience Program, Melbourne (2007) [E3]
2007	Walker Frederick Rohan, Hinwood Madeleine, Masters Louise Marie, Dielenberg Robert, Day Trevor Anthony, 'Individual differences predict susceptibility to conditioned fear arising from psychosocial trauma (Poster)', 7th IBRO 2007 World Congress of Neuroscience Program, Melbourne (2007) [E3]
2006	Walker Frederick Rohan, Masters Louise Marie, Dielenberg Robert, Day Trevor Anthony, 'Individual differences in coping strategy predict glucocorticoid responses to psychosocial stress', Proceedings of the Australian Neuroscience Society, Sydney, NSW (2006) [E3]
2005	Beck Alison Kate, Hodyl Nicolette Anne, Krivanek Klara, Knott Brendon Gregory, Walker Frederick Rohan, Hodgson Deborah Maree, 'Impact of Neonatal Endotoxin Exposure on Nociception in the F344 Rat: A Developmental Perspective', Australian Neuroscience Society: Proceedings of the 25th Annual "Silver Jubilee" Meeting, Perth, Australia (2005) [E3]
2005	Hodyl Nicolette Anne, Krivanek Klara, Walker Frederick Rohan, Feltis Brooke Belinda, Hodgson Deborah Maree, 'A Developmental Profile of the Effects of Prenatal Endotoxin Exposure on Neuroendocrine and Immune Function', Australian Neuroscience Society: Proceedings of the 25th Annual "Silver Jubilee" Meeting, Perth, Australia (2005) [E3]
2005	Hodyl Nicolette Anne, Krivanek Klara, Walker Frederick Rohan, Hodgson Deborah Maree, 'Neuroendocrine, Immune and Nociceptive Responses in Offspring Exposed to an Immune Challenge Prenatally', "Before and Beyond Birth" Perinatal Society of Australia and New Zealand 9th Annual Congress, Adelaide, Australia (2005) [E3]
2005	Knott Brendon Gregory, Walker Frederick Rohan, Hodgson Deborah Maree, 'Postnatal Bacterial Infection as a Predictor of Post Traumatic Stress Disorder: Physiological and Behavioural Correlates in the Rodent', Pediatric Research: Placenta and Intrauterine Growth, V58(5) suppl: Proceedings of 3rd International Congress on Developmental Origins of Health & Disease, Toronto, Canada (2005) [E3]
2005	Krivanek Klara, Hodyl Nicolette Anne, Walker Frederick Rohan, Hodgson Deborah Maree, 'Maternal and Foetal Immune and Neuroendocrine Response to Type 1 and Type 2 Immune Stimuli', "Before and Beyond Birth" Perinatal Society of Australia and New Zealand 9th Annual Congress, Adelaide, Australia (2005) [E3]
2003	Hodgson Deborah Maree, Mears Cristina Erin Pritchard, Walker Frederick Rohan, 'Immune activation during pregnancy alters offspring's endocrine and immune responses in adulthood', Pediatric Research, Brighton, UK (2003) [E3]
2003	Hodgson Deborah Maree, Mears Cristina Erin Pritchard, Walker Frederick Rohan, 'Impact of immune activation during pregnancy on offspring's endocrine and immune responses in adulthood', Brain, Behavior, and Immunity, Amelia Island, Florida (2003) [E3]
2003	Hodyl Nicolette Anne, Walker Frederick Rohan, Owens Julie, Hodgson Deborah Maree, 'Exposure to a Bacterial Infection During Pregancy alters Fetal Development with Consequences for Glucose Metabolism', The Endocrine Society of Australia Proceedings 2003, Melbourne, Victoria (2003) [E3]
2003	Walker Frederick Rohan, Brogan Antonia Elizabeth, Hodgson Deborah Maree, 'Neonatal endotoxin exposure alters mother-pup interactions and is associated with anxiety-like behaviour in adulthood', Brain Behaviour, and Immunity, Amelia Island, Florida (2003) [E3]
2003	Walker Frederick Rohan, Hodgson Deborah Maree, 'Neonatal endotoxin exposure alters metabolic and immune responses in adulthood', Pediatric Research, Brighton, UK (2003) [E3]
2003	Walker Frederick Rohan, Hodyl Nicolette Anne, Hodgson Deborah Maree, 'Neonatal Bacterial Endotoxin Exposure Alters Glucose Metabolism, Leptin Production and Body Mass Index Across Development in the Fischer 344 Rat', The Endocrine Society of Australia Proceedings 2003, Melbourne, Victoria (2003) [E3]
2002	Hodgson Deborah Maree, Brown A, Walker Frederick Rohan, 'Exposure to bacterial endotoxin in early life alters immunological responsivity in adulthood', Brain, Behavior, and Immunity vol 16, no.2, April 2002, Wisconsin, USA (2002) [E3]
2002	Hodgson Deborah Maree, Hodyl Nicolette Anne, Walker Frederick Rohan, 'Neuroendocrine programming of cancer: the role of pre natal and postnatal physiological stressors', Conference supplements: The Endocrine Society of Australia, Adelaide, Australia (2002) [E3]
2002	Hodgson Deborah Maree, March James Richard, Walker Frederick Rohan, 'Neonatal Exposure to Bacterial Endotoxin is Associated with Increased Anxiety-Related Behavior and Altered Metabolic Responsivity in Adulthood', Brain, Behavior, and Immunity vol 16, no.2, April 2002, Wisconsin, USA (2002) [E3]
2002	Hodyl Nicolette Anne, Walker Frederick Rohan, Hodgson Deborah Maree, 'Prenatal endotoxin exposure reduces stress response of pre-weaned guinea pigs in sex-specific manner', Conference Supplements : The Endocrine Society of Australia, Adelaide, South Australia (2002) [E3]
2002	Walker Frederick Rohan, Hodgson Deborah Maree, 'Neonatal Bacterial endotoxin exposure alters pro-inflammatory and febrile responses in adult rodents', The Endocrine Society of Australia, Adelaide, South Australia (2002) [E3]
2001	Hodgson Deborah Maree, Knott Brendon Gregory, Walker Frederick Rohan, Allen T, 'Neonatal Stress Potentiates HPA Activity and Enhances Tumor Metastasis in Adult Rodents', The Endocrine Society of Australia: Proceedings 2001, Queensland (2001) [E3]
2000	Hodgson Deborah Maree, Rosengren Sally Marie, Walker Frederick Rohan, 'Exposure to neonatal stress potentiates hypothalmic-pituitary-adrenal (HPA) responsivity and impairs tumor immunity and wound healing in the adult rat', International Journal of Behavioural Medicine (2000) [E3]
2000	Hodgson Deborah Maree, Rosengren Sally Marie, Walker Frederick Rohan, 'Neonatal stress exposure impairs wound healing and tumor immunity in the adult rat', Psychoneuroendocronology (2000) [E3]
2000	Hodgson Deborah Maree, Rosengren Sally Marie, Walker Frederick Rohan, 'Neonatal stress potentiates hypothalmic-pituitary-adrenal (HPA) responsivity and impairs wound healing and tumor resistance in the adult rat', Brain Behavior and Immunity, Brisbane Australia (2000) [E3]

The University of Newcastle, Australia