Research Topics
Genomes and GenesSpecies | Alistair Jan GunnSummaryAffiliation: University of Auckland Country: New Zealand Publications
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Detail Information
Publications
A key role for connexin hemichannels in spreading ischemic brain injuryJoanne O Davidson
Department of Physiology, The University of Auckland, Auckland, New Zealand
Curr Drug Targets 14:36-46. 2013....
Nonadditive neuroprotection with early glutamate receptor blockade and delayed hypothermia after asphyxia in preterm fetal sheepSherly A George
Department of Physiology, The University of Auckland, Private Bag 92019, Auckland 1023, New Zealand
Stroke 43:3114-7. 2012..7 weeks gestation (equivalent to 28-32 weeks in humans)...
Subclinical exposure to low-dose endotoxin impairs EEG maturation in preterm fetal sheepMichael J Keogh
Department of Physiology, University of Auckland, New Zealand
Am J Physiol Regul Integr Comp Physiol 303:R270-8. 2012..These data suggest that low-dose endotoxin exposure can impair EEG maturation in preterm fetal sheep in association with neural inflammation but without hemodynamic disturbances or cortical injury...
Therapeutic hypothermia changes the prognostic value of clinical evaluation of neonatal encephalopathyAlistair J Gunn
Department of Physiology, University of Auckland, Auckland, New Zealand
J Pediatr 152:55-8, 58.e1. 2008..To evaluate whether therapeutic hypothermia alters the prognostic value of clinical grading of neonatal encephalopathy...
Hypothermic neuroprotectionA J Gunn
Dept of Physiology, The University of Auckland, New Zealand
NeuroRx 3:154-69. 2006..These studies, however, show that only a subset of babies seemed to benefit. The challenge for the future is to find ways of improving the effectiveness of treatment...
Dramatic neuronal rescue with prolonged selective head cooling after ischemia in fetal lambsA J Gunn
Research Centre for Developmental Medicine and Biology, Department of Paediatrics, School of Medicine, University of Auckland, New Zealand
J Clin Invest 99:248-56. 1997..g., 40 vs. 99% in the parasagittal cortex, P < 0.001). Selective head cooling, maintained throughout the secondary phase of injury, is noninvasive and safe and shows potential for improving neonatal outcome after perinatal asphyxia...
The premature fetus: not as defenseless as we thought, but still paradoxically vulnerable?A J Gunn
Liggins Institute and Department of Pediatrics, University of Auckland, New Zealand
Dev Neurosci 23:175-9. 2001....
Head cooling for neonatal encephalopathy: the state of the artAlistair Jan Gunn
Department of Physiology, The University of Auckland, Auckland, New Zealand
Clin Obstet Gynecol 50:636-51. 2007..The key remaining issues are to finding better ways of identifying babies who are most likely to benefit, to define the optimal mode and conditions of hypothermia and to find ways to further improve the effectiveness of treatment...
Therapeutic hypothermia: from lab to NICUAlistair Jan Gunn
University of Auckland, Auckland, New Zealand
J Perinat Med 33:340-6. 2005..Both long-term followup studies and further large studies of whole body cooling are in progress...
Brain cooling for preterm infantsAlistair Jan Gunn
Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
Clin Perinatol 35:735-48, vi-vii. 2008..Induced hypothermia likely has potential to significantly reduce disability. Cautious, systematic trials are essential before hypothermia can be used in these vulnerable infants...
Bibliometric analysis of HRC-supported biomedical publications, 1990 to 1994A J Gunn
Department of Paediatrics, University of Auckland
N Z Med J 112:351-4. 1999....
Fetal hypoxia insults and patterns of brain injury: insights from animal modelsAlistair Jan Gunn
Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, 85 Park Road, Grafton, Auckland 1023, New Zealand
Clin Perinatol 36:579-93. 2009....
Is temperature important in delivery room resuscitation?A J Gunn
Research Centre for Developmental Medicine and Biology, Department of Paediatrics, University of Auckland, Auckland, New Zealand
Semin Neonatol 6:241-9. 2001....
Does early hospital discharge with home support of families with preterm infants affect breastfeeding success? A randomized trialT R Gunn
Department of Paediatrics, University of Auckland, New Zealand
Acta Paediatr 89:1358-63. 2000..8% vs 11.9% at 6 wk, p = 0.37). Conclusion: Early discharge from hospital once a preterm infant can take full oral feeds does not alter later breastfeeding rates when adequate visiting nursing support is available...
The 'pharmacology' of neuronal rescue with cerebral hypothermiaA J Gunn
Department of Paediatrics, Research Centre for Developmental Medicine and Biology, University of Auckland, New Zealand
Early Hum Dev 53:19-35. 1998..These encouraging results must be balanced against the adverse systemic effects of hypothermia. Randomised clinical trials are in progress to establish the safety and efficacy of prolonged cerebral hypothermia...
Window of opportunity of cerebral hypothermia for postischemic white matter injury in the near-term fetal sheepVincent Roelfsema
The Liggins Institute, University of Auckland, Auckland, New Zealand
J Cereb Blood Flow Metab 24:877-86. 2004..Protection was closely associated with reduced expression of both activated caspase-3 and of reactive microglia...
Regulation of cytochrome oxidase redox state during umbilical cord occlusion in preterm fetal sheepLaura Bennet
Department of Physiology, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Am J Physiol Regul Integr Comp Physiol 292:R1569-76. 2007..In conclusion, these data strongly suggest active regulation of cerebral metabolism during the initial response to severe hypoxia, which may help to protect the immature brain from injury...
The ontogeny of hemodynamic responses to prolonged umbilical cord occlusion in fetal sheepGuido Wassink
Department of Physiology, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
J Appl Physiol 103:1311-7. 2007....
The effect of cerebral hypothermia on white and grey matter injury induced by severe hypoxia in preterm fetal sheepL Bennet
Department of Physiology and Paediatrics, University of Auckland, Auckland, New Zealand
J Physiol 578:491-506. 2007..Further studies are required to evaluate the long-term impact of cooling on brain growth and maturation...
Induced cerebral hypothermia reduces post-hypoxic loss of phenotypic striatal neurons in preterm fetal sheepS George
Department of Physiology, Faculty of Medicine and Health Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Exp Neurol 203:137-47. 2007..These findings suggest that head cooling may help reduce basal ganglia injury in some premature babies...
Effect of cerebral hypothermia and asphyxia on the subventricular zone and white matter tracts in preterm fetal sheepRobert Daniel Barrett
Department of Physiology, Faculty of Medicine and Health Science, The University of Auckland, Private Bag 92019, Auckland 1023, New Zealand
Brain Res 1469:35-42. 2012..Although white matter protection with cerebral hypothermia was associated with reduced proliferation in the white matter tracts, it did not impair proliferation in the SVZ...
Transient NMDA receptor-mediated hypoperfusion following umbilical cord occlusion in preterm fetal sheepJustin M Dean
Department of Physiology, Faculty of Medicine and Health Science, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Exp Physiol 91:423-33. 2006..The timing of this effect in the cerebral circulation corresponds closely to abnormal EEG activity, suggesting a pathological glutaminergic activation that we speculate is related to evolving brain injury...
Destruction and reconstruction: hypoxia and the developing brainRobert D Barrett
Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
Birth Defects Res C Embryo Today 81:163-76. 2007..Based on these concepts the impact of proposed interventions such as induced hypothermia and endogenous growth factors are likely to be complex, but potentially offer focused ways of improving the outcomes of premature birth...
Differential effects of hypothermia on early and late epileptiform events after severe hypoxia in preterm fetal sheepL Bennet
Department of Physiology, Faculty of Medicine and Health Science, The University of Auckland, Private Bag 92019, Auckland, New Zealand
J Neurophysiol 97:572-8. 2007....
Does head cooling with mild systemic hypothermia affect requirement for blood pressure support?Malcolm R Battin
Newborn Services, National Women s Health, Auckland City Hospital, Private Bag 92 024, Auckland, New Zealand
Pediatrics 123:1031-6. 2009..Our goal was to evaluate whether head cooling with mild systemic hypothermia for neonatal encephalopathy is associated with greater requirement for volume or inotrope support...
The effect of mild hypothermia on insulin-like growth factors after severe asphyxia in the preterm fetal sheepVincent Roelfsema
Department of Physiology, University of Auckland, Auckland, New Zealand
J Soc Gynecol Investig 12:232-7. 2005....
The incidence, clinical features, and treatment of type 2 diabetes in children <15 yr in a population-based cohort from Auckland, New Zealand, 1995–2007Craig Jefferies
Starship Children s Hospital, Auckland District Health Board, Auckland, New Zealand
Pediatr Diabetes 13:294-300. 2012..The incidence of type 2 diabetes mellitus (T2DM) is increasing in adolescents in most western countries. The time-course of glycemic control and impact of early treatment remain poorly understood...
ST waveform changes during repeated umbilical cord occlusions in near-term fetal sheepJ A Westgate
Department of Obstetrics and Gynecology and the Research Centre for Developmental Medicine and Biology, University of Auckland, New Zealand
Am J Obstet Gynecol 184:743-51. 2001..Interocclusion waveform height may be a better reflection of the severity of hypoxia. The appearance of biphasic and negative waveforms between occlusions may be a useful marker for severe decompensation...
Connexin hemichannel blockade improves outcomes in a model of fetal ischemiaJoanne O Davidson
Department of Physiology, University of Auckland, Auckland, New Zealand
Ann Neurol 71:121-32. 2012..In this study, we tested the hypothesis that opening of hemichannels after cerebral ischemia may contribute to delayed evolution of injury...
The fetal heart rate response to hypoxia: insights from animal modelsLaura Bennet
Department of Physiology, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Clin Perinatol 36:655-72. 2009....
Polyuria and impaired renal blood flow after asphyxia in preterm fetal sheepJ S Quaedackers
The Liggins Institute, The University of Auckland, Auckland, New Zealand
Am J Physiol Regul Integr Comp Physiol 286:R576-83. 2004..Despite a prolonged increase in RVR, there was only a modest effect on glomerular function...
Endogenous alpha2-adrenergic receptor-mediated neuroprotection after severe hypoxia in preterm fetal sheepJ M Dean
Department of Physiology, Faculty of Medicine and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
Neuroscience 142:615-28. 2006..01; r(2)=0.7). In conclusion, endogenous inhibitory alpha(2)-adrenergic receptor activation after severe hypoxia appears to significantly limit evolving hippocampal damage in the immature brain...
Maternal dexamethasone and EEG hyperactivity in preterm fetal sheepJoanne O Davidson
Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
J Physiol 589:3823-35. 2011..We postulate that these effects may contribute to improved neonatal outcomes...
Dopamine infusion for postresuscitation blood pressure support after profound asphyxia in near-term fetal sheepPaul P Drury
Departments of Physiology and Paediatrics, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019, Auckland 1023, New Zealand
Exp Physiol 98:699-709. 2013..05]. In conclusion, dopamine infusion delayed but did not prevent terminal hypotension after severe asphyxia...
Missed congenital hypothyroidism in an identical twinAnita Azam
Starship Children s Hospital, Auckland, New Zealand
J Paediatr Child Health 48:936-8. 2012..It is important to maintain a high index of suspicion in same-sex twin pregnancies of potential congenital hypothyroidism...
Insulin-like growth factor (IGF)-1 suppresses oligodendrocyte caspase-3 activation and increases glial proliferation after ischemia in near-term fetal sheepYun Cao
The Liggins Institute, Faculty of Medicine and Health Sciences, University of Auckland, Auckland, New Zealand
J Cereb Blood Flow Metab 23:739-47. 2003..In contrast, the increase in reactive glia was related only to proliferation. Speculatively, reactive glia may partly mediate IGF-1 white matter protection...
Selective neuroprotective effects with insulin-like growth factor-1 in phenotypic striatal neurons following ischemic brain injury in fetal sheepJ Guan
Research Center for Developmental Medicine and Biology, School of Medicine, University of Auckland, New Zealand
Neuroscience 95:831-9. 2000..These data suggest a potential role for insulin-like growth factor-1 in preventing cerebral palsy due to perinatal asphyxia...
The cardiovascular and cerebrovascular responses of the immature fetal sheep to acute umbilical cord occlusionL Bennet
Research Centre for Developmental Medicine and Biology, Department of Paediatrics, The University of Auckland, Private Bag 92019, Auckland, New Zealand
J Physiol 517:247-57. 1999..These cardiovascular and cerebrovascular responses may contribute to the patterns of cerebral injury seen in the human preterm fetus...
Potential biomarkers for hypoxic-ischemic encephalopathyL Bennet
Fetal Physiology and Neuroscience Group, Department of Physiology, University of Auckland, Private Bag 92019, Auckland, New Zealand
Semin Fetal Neonatal Med 15:253-60. 2010..This is an important area for further research...
The neural and vascular effects of killed Su-Streptococcus pyogenes (OK-432) in preterm fetal sheepL Bennet
Department of Physiology, The University of Auckland, New Zealand
Am J Physiol Regul Integr Comp Physiol 299:R664-72. 2010..We conclude that a single low-dose injection of OK-432 can be associated with risk of focal cerebral injury in the preterm fetus and chronic central and peripheral vasodilatation that does not appear to be mediated by nitric oxide...
Fetal heart rate overshoot during repeated umbilical cord occlusion in sheepJ A Westgate
Department of Obstetrics and Gynecology, University of Auckland, Auckland, New Zealand
Obstet Gynecol 97:454-9. 2001..To assess the clinical utility of overshoot fetal heart rate (FHR) decelerations by examining their occurrence after umbilical cord occlusions of varying frequency and length in near-term fetal sheep...
Potential role for growth hormone in human lactation insufficiencyS R Milsom
Research Centre for Developmental Medicine and Biology, University of Auckland, New Zealand
Horm Res 50:147-50. 1998..2 IU/kg/day (n = 6) but by only 4.7 +/- 9.7%, (p < 0.04) in the combined lower dose group (n = 10). In conclusion, these data suggest that moderate dose hGH therapy in mothers with lactation insufficiency can improve galactopoiesis...
Differential changes in insulin-like growth factors and their binding proteins following asphyxia in the preterm fetal sheepL Bennet
Research Centre for Developmental Medicine and Biology, Department of Paediatrics, The University of Auckland, Auckland, New Zealand
J Physiol 531:835-41. 2001..Alternatively, as IGFs play a role in wound repair, the acute changes in IGF-I and IGFBP-1 may reflect transport of IGF-I from the circulatory pool to injured tissues to promote wound repair...
Adenosine A(1) receptor mediated suppression of adrenal activity in near-term fetal sheepE C Jensen
Dept of Physiology, Faculty of Medical and Health Sciences, The Univ of Auckland, Auckland, New Zealand
Am J Physiol Regul Integr Comp Physiol 298:R700-6. 2010..In conclusion, fetal cortisol concentrations are suppressed by adenosine A(1) receptor activity, largely though a direct adrenal mechanism. This suppression can be partially overcome by supraphysiological stimuli such as asphyxia...
Relationship between evolving epileptiform activity and delayed loss of mitochondrial activity after asphyxia measured by near-infrared spectroscopy in preterm fetal sheepL Bennet
Department of Physiology, University of Auckland, Private Bag 92019, Auckland, New Zealand
J Physiol 572:141-54. 2006..In contrast, the combination of relative cerebral deoxygenation with evolving epileptiform transients in the early recovery phase raises the possibility that these early events accelerate or worsen the subsequent mitochondrial failure...
Acute systemic complications in the preterm fetus after asphyxia: role of cardiovascular and blood flow responsesL Bennet
Department of Physiology, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand
Clin Exp Pharmacol Physiol 33:291-9. 2006..4. This knowledge is essential to develop and refine ways of improving perfusion of the kidneys and other vital organs in premature babies...
Treatment in animal modelsJ Guan
The Liggins Institute, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand
Endocr Dev 9:31-43. 2005..Peripheral administration of GPE also prevents the loss of dopamine neurons and improves long-term functional recovery following 6-OHDA lesion. However, GPE is unlikely to contribute significantly to the direct effects of IGF-1...
Hypoxic-ischemic brain injury in the newborn: pathophysiology and potential strategies for interventionP D Gluckman
The Liggins Institute for Medical Research, The University of Auckland, Auckland 1, New Zealand
Semin Neonatol 6:109-20. 2001..Application of this knowledge will allow us to identify strategies for early intervention and prevent the course of damage caused by hypoxic-ischemic injury...
Insulin-like growth factor-1 and post-ischemic brain injuryJ Guan
Faculty of Medicine and Health Sciences, The Liggins Institute, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Prog Neurobiol 70:443-62. 2003..Such a combined approach is likely to be essential for any clinical treatment...
Impact of insulin pumps on glycaemic control in a pump-naïve paediatric regional populationMartin de Bock
The Liggins Institute Department of Physiology, University of Auckland, Auckland, New Zealand
J Paediatr Child Health 48:247-52. 2012..To examine the clinical impact of insulin-pump therapy for children with type 1 diabetes mellitus (T1DM) in a regional paediatric service, Auckland, New Zealand...
Spontaneous hypoxia in multiple pregnancies is associated with early fetal decompensation and enhanced T-wave elevation during brief repeated cord occlusion in near-term fetal sheepJenny A Westgate
Department of Physiology, University of Auckland, Auckland, New Zealand
Am J Obstet Gynecol 193:1526-33. 2005....
Neurodevelopmental outcome of infants treated with head cooling and mild hypothermia after perinatal asphyxiaM R Battin
Newborn Service, National Women s Hospital, Auckland, New Zealand
Pediatrics 107:480-4. 2001..To determine the neurodevelopmental outcome of infants treated with head cooling with systemic hypothermia after hypoxic-ischemic encephalopathy...
Glucocorticoids and preterm hypoxic-ischemic brain injury: the good and the badLaura Bennet
Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland 1142, New Zealand
J Pregnancy 2012:751694. 2012..We review the clinical and experimental evidence on how glucocorticoids may affect the developing brain and highlight the need for systematic research...
Post-hypoxic hypoperfusion is associated with suppression of cerebral metabolism and increased tissue oxygenation in near-term fetal sheepE C Jensen
Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
J Physiol 572:131-9. 2006..These data suggest that posthypoxic hypoperfusion is actively mediated and reflects suppressed cerebral metabolism...
Insulin-like growth factor-1 reduces postischemic white matter injury in fetal sheepJ Guan
Research Center for Developmental Medicine and Biology, Department of Pediatrics, Faculty of Medicine and Health Sciences, University of Auckland, Auckland, New Zealand
J Cereb Blood Flow Metab 21:493-502. 2001..After ischemia there was a close association of PLP mRNA labeled cells with reactive astrocytes and macrophages/microglia. In conclusion, IGF-1 can prevent delayed, postischemic oligodendrocyte cell loss and associated demyelination...
Apparently life threatening events in infant car safety seatsShirley L Tonkin
New Zealand Cot Death Association, Auckland, New Zealand
BMJ 333:1205-6. 2006
Initial growth deceleration during GnRH analogue therapy for precocious pubertyFrances Mouat
The Liggins Institute, University of Auckland, Auckland, New Zealand
Clin Endocrinol (Oxf) 70:751-6. 2009..To compare the efficacy of goserelin and leuprolide on initial deceleration of growth and weight gain during the first 12 months of GnRH analogue treatment for precocious puberty...
The impact of ethnicity on the presentation of polycystic ovarian syndromeK Williamson
Department of Reproductive Medicine, National Women's Hospital, Auckland, New Zealand
Aust N Z J Obstet Gynaecol 41:202-6. 2001..The adverse metabolic profile of many of these women, particularly the Maori and Pacific Islanders, is very likely to predispose them to early cardiovascular disease...
Ethnicity and social deprivation independently influence metabolic control in children with type 1 diabetesP J Carter
Paediatric Diabetes Service, Greenlane Clinical Centre, Starship Children s Health, Auckland, New Zealand
Diabetologia 51:1835-42. 2008....
What is the mechanism of sudden infant deaths associated with co-sleeping?Christine G McIntosh
Dept of Physiology, University of Auckland, Private Bag 92019, Auckland 1023, New Zealand
N Z Med J 122:69-75. 2009..Further research is needed, but on present evidence, all parents should be advised to sleep their baby in a cot or similar next to their parent's bed, until baby is at least 6 months of age...
Memories of the fetal heartLaura Bennet
Am J Physiol Regul Integr Comp Physiol 285:R517-8. 2003
