Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0848237 (acute stress)
 4,619 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The immune response to vaccination in animals can be enhanced by exposure to acute stress at the time of vaccination. The efficacy of this adjuvant strategy for vaccination in humans requires investigation. The current study employed a randomised controlled trial design to examine the effects of eccentric exercise prior to influenza vaccination on the antibody and cell-mediated responses. Sixty young healthy adults (29 men, 31 women) performed eccentric contractions of the deltoid and biceps brachii muscles of the non-dominant arm (exercise group) or rested quietly (control group), and were vaccinated 6h later in the non-dominant arm. Change in arm circumference and pain were measured to assess the physiological response to exercise. Antibody titres were measured pre-vaccination and at 6- and 20-week follow-ups. Interferon-gamma in response to in vitro stimulation by the whole vaccine, an index of the cell-mediated response, was measured 8 weeks post-vaccination. Interferon-gamma responses were enhanced by exercise in men, whereas antibody titres were enhanced by eccentric exercise in women but not in men. Men showed greater increase in arm circumference after eccentric exercise than women but there was no difference in reported pain. The interferon-gamma response was positively associated with the percentage increase in arm circumference among the exercise group. Eccentric exercise exerted differential effects on the response to vaccination in men and women, with enhancement of the antibody response in women, but enhancement of the cell-mediated response in men. Eccentric exercise of the muscle at the site of vaccine administration should be explored further as a possible behavioural adjuvant to vaccination.
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PMID:Eccentric exercise as an adjuvant to influenza vaccination in humans. 1682 30

The characterization of the corticotropin-releasing factor (CRF) family of neuroendocrine regulatory peptides, the cloning and pharmacological characterization of two CRF receptor subtypes (CRF(1) and CRF(2)), and the development of selective CRF receptor antagonists provided new insight to unravel the mechanisms of stress and the potential involvement of the CRF system in different pathophysiological conditions, including functional gastrointestinal disorders, mainly irritable bowel syndrome (IBS), and psychopathologies such as anxiety/depression. Compelling pre-clinical data showed that brain CRF administration mimics acute stress-induced colonic responses and enhances colorectal distension-induced visceral pain in rats through CRF(1) receptors. Similarly, peripheral CRF reduced the pain threshold to colonic distension and increased colonic motility in humans and rodents. These observations mimic the manifestations of IBS, characterized by abdominal bloating/discomfort and altered bowel habits. Moreover, CRF-CRF(1) pathways have been implicated in the development of anxiety/depression. These psychopathologies, together with stressful life events, have high comorbidity with IBS, and are considered significant components of the disease. From these observations, CRF(1) receptors have been suggested as a target to treat IBS. Peripherally acting CRF(1) antagonists might directly improve IBS symptoms, as related to motility, secretion and immune response. On the other hand, central actions will be beneficial as to prevent the psychopathologies that co-exist with IBS and as a way to modulate the central processing of stress- and visceral pain-related signals. Here, we review the pre-clinical and clinical data supporting these assumptions, and address the efforts done at a pharmaceutical level to develop effective therapies targeting CRF(1) receptors for functional gastrointestinal disorders.
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PMID:CRF1 receptors as a therapeutic target for irritable bowel syndrome. 1710 Jun 12

: The role of injury-related beliefs and hopelessness on depression and anxiety in the acute phase following hip fracture was investigated in 103 hip fracture patients. Participants were assessed at two time points: as inpatients within one week of their surgery, and then 3-weeks later as outpatients. Abramson et al.'s (1989) theory of hopelessness-related depression was investigated as a possible explanatory model to account for depression following hip fracture. Results indicated that hopelessness mediated the relationship between beliefs regarding personal control and depression at the second assessment. Anxiety at follow-up was predicted by control beliefs whereas physical mobility, acute stress and pain made no significant contribution. This study is the first to provide tentative evidence that post-injury beliefs and hopelessness influence levels of depression and anxiety in hip fracture patients in the acute phase of their injury, and indicates that further study in this area is warranted.
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PMID:Predicting acute anxiety and depression following hip fracture. 1725 3

Mulesing is traditionally performed on approximately 80% of Merino wool-producing sheep in Australia. Mulesing produces a stress response that persists for 24 to 48 hours. Behavioural changes indicative of pain and discomfort resolve within 24 and 48 hours, respectively. Reductions in weight gain may persist for 14 days. The acute stress response to mulesing has been shown to be similar to that produced by shearing, castration and mild flystrike, but mulesing has a longer duration of response (24 to 48 hours) than shearing (1 hour) or knife castration (8 to 24 hours), whereas flystrike response persists for the duration of infection. Theoretically, if mulesing were not used, with Merino sheep of existing genetics, increased chemical use and flock inspections could keep flystrike rates to approximately equivalent to present levels in some production systems. Increased handling events for chemical preventative application would represent a mild stressor for sheep, but cumulatively not more than that of mulesing. If producers were able and prepared to sufficiently increase resources into alternative anti-flystrike methods, then the welfare of Merino sheep would probably be equivalent or better to that of today. If constraints such as property size or finances dictate a sub-optimal level of flystrike prevention and treatment, then animal welfare will unquestionably be worse. The result of that equation would depend on individual flock managers, the physical characteristics of their production system, the profitability of their business, and seasonal variations in flystrike risk. It is likely that there would be some occasions when flystrike would increase. This highlights the need for alternative strategies, such as genetic selection, to reduce the susceptibility of Australian Merino sheep to flystrike.
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PMID:Welfare consequences of mulesing of sheep. 1735 5

Perpetual noise, pain, disturbed day-night-cycle, the inability to talk and the difficulty, especially during weaning, to differentiate alertness from sleep and dream from reality are some of the burdens ICU patients are suffering from. Additional sedation and potential sedation gaps plus the medical treatment itself put strain on critically ill humans. Those external stimuli partly cannot be handled well by the patients. Some of these factors or a combination of them, combined with a predisposition and/or insufficient coping mechanisms can result in a wide range of psychiatric disorders. Often psychiatric symptoms appear unspecific and difficult to categorize. Firstly some psychopathological cardinal symptoms are described and potential differential diagnoses are mentioned. After that the following article focuses on sleep, adjustment, depressive and the spectrum of anxiety disorders (especially generalized anxiety disorders, panic disorders, acute stress disorder (ASD) and posttraumatic stress disorder (PTSD)). The article provides prevalences, etiology and risk factors as well as symptomatology, diagnostics and therapeutic options. Those disorders can be diagnosed in ICU but also after transferring to general ward. In our own experience the transfer period is a vulnerable phase for psychopathologic symptoms. As apart from the individual suffering the course of the somatic disease as well as the rehabilitation process are impaired and the disorders have a tendency to have a chronic course, close and early collaboration of ICU physicians and psychiatrists is mandatory.
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PMID:[Psychiatric disorders in intensive care--part three: psychic reactions, affective and anxiety disorders]. 1736 37

In pre-clinical models intended to evaluate nociceptive processing, acute stress suppresses reflex responses to thermal stimulation, an effect previously described as stress-induced "analgesia." Suggestions that endogenous opioids mediate this effect are based on demonstrations that stress-induced hyporeflexia is enhanced by high dose morphine (>5 mg/kg) and is reversed by naloxone. However, reflexes and pain sensations can be modulated differentially. Therefore, in the present study direct comparisons were made of opioid agonist and antagonist actions, independently and in combination with acute restraint stress in Long Evans rats, on reflex lick-guard (L/G) and operant escape responses to nociceptive thermal stimulation (44.5 degrees C). A high dose of morphine (>8 mg/kg) was required to reduce reflex responding, but a moderate dose of morphine (1 mg/kg) significantly reduced escape responding. The same moderate dose (and also 5 mg/kg) of morphine significantly enhanced reflex responding. Naloxone (3 mg/kg) significantly enhanced escape responding but did not affect L/G responding. Restraint stress significantly suppressed L/G reflexes (hyporeflexia) but enhanced escape responses (hyperalgesia). Stress-induced hyperalgesia was significantly reduced by morphine and enhanced by naloxone. In contrast, stress-induced hyporeflexia was blocked by both naloxone and 1 mg/kg of morphine. Thus, stress-induced hyperalgesia was opposed by endogenous opioid release and by administration of morphine. Stress-induced hyporeflexia was dependent upon endogenous opioid release but was counteracted by a moderate dose of morphine. These data demonstrate a differential modulation of reflex and operant outcome measures by stress and by separate or combined opioid antagonism or administration of morphine.
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PMID:Opioid modulation of reflex versus operant responses following stress in the rat. 1752 23

There is growing awareness of the mental health impact of all types of mass violence. The exposure of large population groups, mostly having no mental health problems prior to the exposure, and the subsequent development, in a significant proportion of the population, of a variety of psychiatric symptoms and disorders represent both a challenge and an opportunity for psychiatrists. There is sufficient evidence from the variety of mass violence/conflict situations, that a significant proportion of the exposed population develop different mental disorders. There are vulnerable groups like women, children, widows, orphans, elderly, disabled, those exposed to severe pain and loss of body parts. There is also a consistent finding of the dose-response to the amount of trauma and the prevalence of mental disorders. There is growing recognition that there is need to consider a variety of syndromes, in addition to post-traumatic stress disorder (PTSD) like acute stress disorder (ASD), depression, complicated bereavement reactions, substance use disorders, poor physical health, fear, anxiety, physiological arousal, somatisation, anger control, functional disability and arrest or regression of childhood developmental progression. The challenge is to reach all of the ill persons and provide mental health services. The opportunity provided by this field is to develop a better understanding of issues of resilience, recovery and effectiveness of public health approaches to mental health care.
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PMID:Mass violence and mental health--recent epidemiological findings. 1756 96

Acute stress has been known to produce several behavioral, neurochemical and biochemical alterations. Cyclooxygenase (COX) enzymes are involved in pathogenesis of several brain disorders including Alzheimer disease, epilepsy, depression, in addition to pain and inflammation. In the present study, we examined the role of non-selective (naproxen) and selective (rofecoxib, valdecoxib) COX-2 inhibitors against acute immobilization stress-induced behavioral alterations and oxidative damage in mice. Mice were subjected to acute immobilization stress for a period of 6 h. Naproxen (7 and 14 mg/kg, ip), rofecoxib (5 and 10 mg/kg, ip) or valdecoxib (5 and 10 mg/kg, ip) were administered 30 min before acute stress. Six-our immobilization stress significantly caused anxiety-like behavior, memory deficit and impaired motor activity as well as oxidative damage (raised lipid peroxidation, nitrite activity, depletion of reduced glutathione and catalase activity) as compared to naive animals placed on sawdust (p < 0.05). Pretreatment with naproxen (7 and 14 mg/kg, ip), rofecoxib (5 and 10 mg/kg, ip) and valdecoxib (5 and 10 mg/kg, ip) significantly improved locomotor activity, antianxiety effect, memory retention (memory deficit) and attenuated oxidative damage (lowering of raised malondialdehyde, nitrite activity, restoration of reduced glutathione and catalase activity as compared to immobilization stress group (p < 0.05). Results suggest the neuroprotective and antioxidant effect of both non-selective and selective COX-2 inhibitors.
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PMID:Protective effect of non-selective and selective COX-2-inhibitors in acute immobilization stress-induced behavioral and biochemical alterations. 1819 59

This article reviews current research on acute stress disorder (ASD) and posttraumatic stress disorder (PTSD) resulting from pediatric simple (i.e., single, unpredictable, and unintentional) physical injury and how pain may act as both a trigger and a coexisting symptom. Although several studies have explored predictors of ASD and PTSD, as well as the relationship between these conditions in adults, there is less research on ASD and PTSD in children and adolescents. This review highlights the importance of early detection of pain and acute stress symptoms resulting from pediatric unintentional physical injury in the hopes of preventing long-term negative outcomes, such as the potential development of PTSD and associated academic, social, and psychological problems.
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PMID:The impact of unintentional pediatric trauma: a review of pain, acute stress, and posttraumatic stress. 1833 34

Risk of developing certain diseases correlates with human personality. Cardiologists have defined Type "A" personalities as coronary-prone. Associated psychological peculiarities are easily angered, competitive, impatient and hard-driving. Psychologically-opposite people who are prone to suppress emotions and avoid conflicts (Type "C"), have a high risk of infectious diseases and certain forms of cancer. The development of contemporary biology and medicine determined an important role of the neuroendocrine and immune systems in these correlations. The peculiarity of human personality, as much as of animal behavioral patterns, is strongly expressed under stress conditions. The strategies of stress coping display a normal distribution in the human and wild animal populations, with truly passive and active coping styles located at the outermost regions of the curve. However, there are a number of strategies to breed experimental animals with extreme coping styles; animals selected for a passive coping style to acute stress show marked activation of the hypothalamic-pituitary-adrenal (HPA) axis and low stimulation of the sympathetic-adrenal system; both are associated with immunosuppression. An opposite reaction of the neuroendocrine system has been shown in animals with an active coping style to stress; this was associated with the signs of immunostimulation. Similarly, people with passive coping style (type "C") might be at higher risk of infectious diseases and cancer, while people with active coping style (type "A") might be predisposed to coronary, allergic, and autoimmune diseases. Furthermore, pain, decreased productivity, and anxiety, all common in patients with different diseases, are additional stressful entities. Thus, an adequate coping with a disease is an important approach to improve life quality and disease prognosis. Therefore, psychological and psychopharmacotherapeutic interventions that enhance effective coping should have beneficial effects in patients with immune-mediated diseases.
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PMID:Personality, coping style, and constitutional neuroimmunology. 1856 93


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