P. Opstad

发表

Seven days’ around the clock exhaustive physical exertion combined with energy depletion and sleep deprivation primes circulating leukocytes

T. Reistad, P. Vaagenes, Y. Gundersen, 2006, European Journal of Applied Physiology.

One week of multifactorial high-stress military ranger training affects Gram-negative signalling

P. Vaagenes, Y. Gundersen, P. Opstad, 2012, Scandinavian journal of clinical and laboratory investigation.

Severe gunshot injuries in a porcine model: impact on central markers of innate immunity

P. Vaagenes, Y. Gundersen, P. Opstad, 2011, Acta anaesthesiologica Scandinavica.

Plasma Cytokine Profiles in Long-Term Strenuous Exercise

T. Lyberg, P. Opstad, H. G. Nielsen, 2016, Journal of sports medicine.

Response of circulating immune cells to major gunshot injury, haemorrhage, and acute surgery.

I. Bogen, T. Reistad, P. Vaagenes, 2005, Injury.

Changes in the circadian rhythm of performance and mood in healthy young men exposed to prolonged, heavy physical work, sleep deprivation, and caloric deficit.

J. Bugge, P. Opstad, P. Magnus, 1979, Aviation, space, and environmental medicine.

HORMONAL RESPONSE TO PROLONGED PHYSICAL STRAIN, EFFECT OF CALORIC DEFICIENCY AND SLEEP DEPRIVATION

P. Opstad, A. Aakvaag, 1985 .

Effect of immune modulation on TT virus (TTV) and TTV‐like‐mini‐virus (TLMV) viremia

M. Degré, K. Bjøro, B. Grinde, 2003, Journal of medical virology.

Hydrocortisone and the mitogen-activated protein kinase inhibitor U0126 acutely suppress reactive oxygen species generation from circulating granulocytes after gunshot injuries in the pig

O. Myhre, P. Vaagenes, Y. Gundersen, 2003, Critical care medicine.

Alterations in the morning plasma levels of hormones and the endocrine responses to bicycle exercise during prolonged strain. The significance of energy and sleep deprivation.

P. Opstad, Per-Kristian, Opstad, 1991, Acta endocrinologica.

Effect of short- and long-term physical activities on circulating granin protein levels

K. Godang, M. Stridsberg, G. Christensen, 2013, Regulatory Peptides.

No effect of seasonal variation in training load on immuno‐endocrine responses to acute exhaustive exercise

B. Pedersen, B. K. Pedersen, R. Bahr, 2001, Scandinavian journal of medicine & science in sports.

Adrenaline stimulated cyclic adenosine monophosphate response in leucocytes is reduced after prolonged physical activity combined with sleep and energy deprivation

K. Skrede, P. Opstad, P. Wiik, 2004, European Journal of Applied Physiology and Occupational Physiology.

Serum ferritin in young men during prolonged heavy physical exercise.

P. Opstad, A. Vidnes, 2009, Scandinavian journal of haematology.

Physical and mental performance of soldiers on high- and low-energy diets during prolonged heavy exercise combined with sleep deprivation.

K. Rodahl, T. Rognum, F. Vartdal, 1986, Ergonomics.

Increase in the ratio of serum levels of apolipoproteins A-I and A-II during prolonged physical strain and calorie deficiency

J. Bugge, P. Opstad, K. Berg, 2004, European Journal of Applied Physiology and Occupational Physiology.

Atrial natriuretic peptide in plasma after prolonged physical strain, energy deficiency and sleep deprivation

O. Sejersted, R. Bahr, K. Skrede, 2004, European Journal of Applied Physiology and Occupational Physiology.

Systemic Chemical Desensitization of Peptidergic Sensory Neurons with Resiniferatoxin Inhibits Experimental Periodontitis

Y. Gundersen, P. Opstad, P. Gjermo, 2011, The open dentistry journal.

Capacity of glycine to modulate early inflammatory disturbances after serious gunshot injuries in the pig

J. Pillgram-Larsen, P. Vaagenes, Y. Gundersen, 2007, Scandinavian journal of clinical and laboratory investigation.

Effects of a 3-month endurance event on physical performance and body composition: the G2 trans-Greenland expedition.

J. DeLany, E. Harman, P. Frykman, 2003, Wilderness & environmental medicine.

Early time course of altered leukocyte response to lipopolysaccharide and peptidoglycan in porcine gunshot injury

A. Aasen, J. Pillgram-Larsen, P. Vaagenes, 2008, Acta anaesthesiologica Scandinavica.

Moderate temperature alterations affect Gram-negative immune signalling in ex vivo whole blood

P. Vaagenes, Y. Gundersen, P. Opstad, 2012, Scandinavian journal of clinical and laboratory investigation.

Metabolic responses to bicycle exercise after several days of physical work and energy deficiency.

T. Rognum, A. Høstmark, P. Opstad, 1981, Scandinavian journal of clinical and laboratory investigation.

Rapid rewarming after mild hypothermia accentuates the inflammatory response after acute volume controlled haemorrhage in spontaneously breathing rats.

P. Vaagenes, Y. Gundersen, P. Opstad, 2003, Resuscitation.

Soluble beta-1,3/1,6-glucan from yeast inhibits experimental periodontal disease in Wistar rats.

P. Opstad, P. Gjermo, H. Preus, 2005, Journal of clinical periodontology.

Calprotectin (S100A8/S100A9) and Myeloperoxidase: Co-Regulators of Formation of Reactive Oxygen Species

A. Bøyum, O. Myhre, M. Bjørås, 2010, Toxins.

Androgenic hormones during prolonged physical stress, sleep, and energy deficiency.

P. Opstad, P. Opstad, 1992, The Journal of clinical endocrinology and metabolism.

THE THYROID FUNCTION IN YOUNG MEN DURING PROLONGED EXERCISE AND THE EFFECT OF ENERGY AND SLEEP DEPRIVATION

F. Fonnum, P. Opstad, O. Øktedalen, 1984, Clinical endocrinology.

Elevated VIP and endotoxin plasma levels in human gram-negative septic shock

P. Brandtzaeg, P. Kierulf, P. Opstad, 1989, Regulatory Peptides.

Oral treatment with complement factor C5a receptor (CD88) antagonists inhibits experimental periodontitis in rats.

T. Woodruff, Y. Gundersen, P. Opstad, 2011, Journal of periodontal research.

Granulocyte chemiluminescence response to serum opsonized zymosan particlesex vivo during long-term strenuous exercise, energy and sleep deprivation in humans

A. Bøyum, P. Opstad, P. Wiik, 2006, European Journal of Applied Physiology and Occupational Physiology.

The Phagocyte Function during Multifactorial Military Stress and Neuroendocrine Interactions with Phagocytes

A. Bøyum, P. Opstad, P. Wiik, 2001 .

Effect of VIP on the respiratory burst in human monocytes ex vivo during prolonged strain and energy deficiency

A. Bøyum, P. Opstad, D. Løvhaug, 1989, Peptides.

Receptors for vasoactive intestinal peptide (VIP) on human mononuclear leucocytes are upregulated during prolonged strain and energy deficiency

S. Knardahl, A. Bøyum, P. Opstad, 1988, Peptides.

Binding of vasoactive intestinal polypeptide (VIP) by human blood monocytes: demonstration of specific binding sites

A. Bøyum, P. Opstad, P. Wiik, 1985, Regulatory Peptides.

N-Acetylcysteine administered as part of the immediate post-traumatic resuscitation regimen does not significantly influence initiation of inflammatory responses or subsequent endotoxin hyporesponsiveness.

P. Vaagenes, Y. Gundersen, P. Opstad, 2005, Resuscitation.

The dynamic response of the β2- and α2 adrenoceptors in human blood cells to prolonged exhausting strain, sleep and energy deficiency

A. Bøyum, M. Bråtveit, P. Opstad, 1994 .

The plasma concentrations of secretin and vasoactive intestinal polypeptide (VIP) after long-term, strenuous exercise

O. B. Schaffalitzky de Muckadell, P. Opstad, O. Øktedalen, 2004, European Journal of Applied Physiology and Occupational Physiology.

Comparison of VIP and beta 2-adrenoceptor-induced relaxations in the circular and longitudinal smooth muscle layers of the rat portal vein.

K. Helle, T. Omland, P. Opstad, 1987, Acta physiologica Scandinavica.

The plasma vasoactive intestinal peptide (VIP) response to exercise is increased after prolonged strain, sleep and energy deficiency and extinguished by glucose infusion

P. Opstad, 1987, Peptides.

Basal hyperchlorhydria and its relation to the plasma concentrations of secretin, vasoactive intestinal polypeptide (VIP) and gastrin during prolonged strain

O. Flaten, P. Opstad, O. Fausa, 1983, Regulatory Peptides.

Chemical sympathectomy inhibits periodontal disease in Fischer 344 rats.

F. Fonnum, Y. Gundersen, P. Opstad, 2005, Journal of periodontal research.

The effect of sleep deprivation on the plasma levels of hormones during prolonged physical strain and calorie deficiency

P. Opstad, A. Aakvaag, 2004, European Journal of Applied Physiology and Occupational Physiology.

Glycine – an important neurotransmitter and cytoprotective agent

P Vaagenes, F. Fonnum, P. Vaagenes, 2005, Acta anaesthesiologica Scandinavica.

Chronic glycine treatment inhibits ligature-induced periodontal disease in Wistar rats.

F. Fonnum, P. Vaagenes, Y. Gundersen, 2005, Journal of periodontal research.

Altered hormonal response to short-term bicycle exercise in young men after prolonged physical strain, caloric deficit, and sleep deprivation

T. Rognum, P. Opstad, A. Aakvaag, 2004, European Journal of Applied Physiology and Occupational Physiology.

Hormonal changes in serum in young men during prolonged physical strain

F. Fonnum, P. Opstad, A. Aakvaag, 1978, European Journal of Applied Physiology and Occupational Physiology.

Moderate hypothermia blunts the inflammatory response and reduces organ injury after acute haemorrhage

P Vaagenes, P. Vaagenes, Y. Gundersen, 2001, Acta anaesthesiologica Scandinavica.

Modest protection of early hydrocortisone treatment in a rat model of volume‐controlled haemorrhage

T. Reistad, P. Vaagenes, Y. Gundersen, 2003, Acta anaesthesiologica Scandinavica.

Plasma renin activity and serum aldosterone during prolonged physical strain

F. Fonnum, P. Opstad, A. Aakvaag, 1985, European Journal of Applied Physiology and Occupational Physiology.

Soldier Health Habits and the Metabolically Optimized Brain.

Marion Trousselard, Karl E Friedl, Robert Carter, 2016, Military medicine.

Strenuous prolonged exercise elevates resting metabolic rate and causes reduced mechanical efficiency.

J. Medbø, O. Sejersted, R. Bahr, 1991, Acta physiologica Scandinavica.

A 4-year follow-up of non-freezing cold injury with cold allodynia and neuropathy in 26 naval soldiers

P. Opstad, E. Jørum, 2019, Scandinavian journal of pain.

Hematological changes in normal men during prolonged severe exercise.

P. Opstad, R. Ekanger, R. Ljosland, 1978, American corrective therapy journal.

Biochemical and Pupillographic Studies of Guinea Pig Iris During Acetylcholinesterase Inhibition

F. Fonnum, P. Opstad, N. Søli, 1981 .

Neonatal dexamethasone and chronic tianeptine treatment inhibit ligature-induced periodontitis in adult rats.

F. Fonnum, Y. Gundersen, P. Opstad, 2006, Journal of periodontal research.

Endocrine and Metabolic Changes during Exhaustive Multifactorial Military Stress. Results from Studies during the Ranger Training Course of the Norwegian Military Academy

P. Opstad, 2001 .

Defense Technical Information Center Compilation Part Notice ADP 010649

P. Opstad, 2022 .

Glucocorticoid receptor antagonist RU 486 treatment reduces periodontitis in Fischer 344 rats.

P. Opstad, P. Gjermo, T. Breivik, 2000, Journal of periodontal research.

Effects of hypothalamic-pituitary-adrenal axis reactivity on periodontal tissue destruction in rats.

P. Opstad, P. Gjermo, T. Breivik, 2000, European journal of oral sciences.

Hypothalamic-pituitary-adrenal axis activation by experimental periodontal disease in rats.

R. Pabst, P. Opstad, P. Gjermo, 2001, Journal of periodontal research.

Chronic treatment with the glucocorticoid receptor antagonist RU486 inhibits diabetes-induced enhancement of experimental periodontitis.

Y. Gundersen, P. Opstad, P. Gjermo, 2014, Journal of periodontal research.

Nicotinic acetylcholine receptor activation mediates nicotine-induced enhancement of experimental periodontitis.

Y. Gundersen, P. Opstad, P. Gjermo, 2009, Journal of periodontal research.

Enhanced susceptibility to periodontitis in an animal model of depression: reversed by chronic treatment with the anti-depressant tianeptine.

F. Fonnum, R. Murison, Y. Gundersen, 2006, Journal of clinical periodontology.

Chronic treatment with the glutamate receptor antagonist MK-801 alters periodontal disease susceptibility.

F. Fonnum, Y. Gundersen, P. Opstad, 2005, Journal of periodontal research.

[Overtraining among elite athletes--causes, diagnosis and treatment].

R. Bahr, P. Opstad, A. Vilberg, 1993, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

Secretin—a new stress hormone?

P. Opstad, O. Oektedalen, O.B.Schaffalitzky de Muckadell, 1982, Regulatory Peptides.

LeuCAM and reactive oxygen species during long-term exercise combined with sleep and energy deficiency.

T. Lyberg, P. Opstad, H. Nielsen, 2007, Medicine and science in sports and exercise.

Decreased serum levels of oestradiol, testosterone and prolactin during prolonged physical strain and sleep deprivation, and the influence of a high calory diet

P. Opstad, A. Aakvaag, Per Kristian Opstad, 2004, European Journal of Applied Physiology and Occupational Physiology.

Negative energy balance in male and female rangers: effects of 7 d of sustained exercise and food deprivation.

J. DeLany, A. Cymerman, K. Friedl, 2006, The American journal of clinical nutrition.

Reduced set-point temperature in young men after prolonged strenuous exercise combined with sleep and energy deficiency.

R. Bahr, P. Opstad, 1991, Arctic medical research.

Regional differences in the lipolytic response of the subcutaneous fat depots to prolonged exercise and severe energy deficiency

K. Rodahl, T. Rognum, P. Opstad, 2004, European Journal of Applied Physiology and Occupational Physiology.

Performance, mood, and clinical symptoms in men exposed to prolonged, severe physical work and sleep deprivation.

P. Opstad, N. Raabe, P K Opstad, 1978, Aviation, space, and environmental medicine.

Nicotinic acetylcholine receptor activation mediates nicotine-induced enhancement of experimental periodontitis.

Y. Gundersen, P. Opstad, P. Gjermo, 2009, Journal of periodontal research.

Effects of long-term exposure of 3,4-methylenedioxymethamphetamine (MDMA; “ecstasy”) on neuronal transmitter transport, brain immuno-regulatory systems and progression of experimental periodontitis in rats

F. Fonnum, I. Bogen, O. Myhre, 2014, Neurochemistry International.

The hypothalamo-pituitary regulation of androgen secretion in young men after prolonged physical stress combined with energy and sleep deprivation.

P. Opstad, 1992, Acta endocrinologica.

The Effect of Strenuous Exercise, Calorie Deficiency and Sleep Deprivation on White Blood Cells, Plasma Immunoglobulins and Cytokines

A. BØyum, J. Reseland, P. Opstad, 1996, Scandinavian journal of immunology.

One week of multifactorial high-stress military ranger training affects Gram-negative signalling

P. Vaagenes, Y. Gundersen, P. Opstad, 2012, Scandinavian journal of clinical and laboratory investigation.

Biochemical plasticity in the superior colliculus of adult rats after chronic visual cortex ablation

V. Fosse, P. Opstad, 1986, Brain Research.

F. Fonnum, I. Bogen, O. Myhre, 2014, Neurochemistry International.

Circadian rhythm of hormones is extinguished during prolonged physical stress, sleep and energy deficiency in young men.

P. Opstad, K. Opstad, 1994, European journal of endocrinology.

The effect of a high calory diet on hormonal changes in young men during prolonged physical strain and sleep deprivation

P. Opstad, A. Aakvaag, 2004, European Journal of Applied Physiology and Occupational Physiology.

The influence of physical and mental training on plasma beta‐endorphin level and pain perception after intensive physical exercise

P. Opstad, E. Solberg, O. Øktedalen, 2001 .

Plasma neuropeptide Y levels in the acute and early convalescent phase after myocardial infarction.

K. Dickstein, T. Omland, P. Opstad, 1994, American heart journal.

Transcutaneous nerve stimulation in patients with coronary arterial disease: haemodynamic and biochemical effects.

L. Woie, P. Opstad, G. Rosland, 1990, European heart journal.

Microbiota-immune-brain interactions: A new vision in the understanding of periodontal health and disease.

P. Opstad, T. Breivik, Yngvar Gundersen, 2024, Periodontology 2000.