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1.
Introduction
Our previous work showed higher tumour necrosis factor (TNF)-α levels in patients with chronic low back pain (cLBP) compared to healthy controls. However, patients with depression as a comorbidity did not have higher TNF-α levels in comparison to patients without depression. In this study we investigated the influence of depression on therapy outcomes such as TNF-α serum levels, pain intensity and back function in patients with cLBP. Our hypothesis was that patients with both cLBP and depression benefit no less than patients with cLBP alone from the multidisciplinary pain therapy. 相似文献2.
Background
Low-grade fever is a common symptom in patients with chronic fatigue syndrome (CFS), but the mechanisms responsible for its development are poorly understood. We submit this case report that suggests that psychological stress contributes to low-grade fever in CFS.Case presentation
A 26-year-old female nurse with CFS was admitted to our hospital. She had been recording her axillary temperature regularly and found that it was especially high when she felt stress at work. To assess how psychological stress affects temperature and to investigate the possible mechanisms for this hyperthermia, we conducted a 60-minute stress interview and observed the changes in the following parameters: axillary temperature, fingertip temperature, systolic blood pressure, diastolic blood pressure, heart rate, plasma catecholamine levels, and serum levels of interleukin (IL)-1β and IL-6 (pyretic cytokines), tumor necrosis factor-α and IL-10 (antipyretic cytokines). The stress interview consisted of recalling and talking about stressful events. Her axillary temperature at baseline was 37.2°C, increasing to 38.2°C by the end of the interview. In contrast, her fingertip temperature decreased during the interview. Her heart rate, systolic and diastolic blood pressures, and plasma levels of noradrenaline and adrenaline increased during the interview; there were no significant changes in either pyretic or antipyretic cytokines during or after the interview.Conclusions
A stress interview induced a 1.0°C increase in axillary temperature in a CFS patient. Negative emotion-associated sympathetic activation, rather than pyretic cytokine production, contributed to the increase in temperature induced by the stress interview. This suggests that psychological stress may contribute to the development or the exacerbation of low-grade fever in some CFS patients.3.
Suzanne D Vernon Sanjay K Shukla Jennifer Conradt Elizabeth R Unger William C Reeves 《BMC microbiology》2002,2(1):39-6
Background
The association of an infectious agent with chronic fatigue syndrome (CFS) has been difficult and is further complicated by the lack of a known lesion or diseased tissue. Cell-free plasma DNA could serve as a sentinel of infection and disease occurring throughout the body. This type of systemic sample coupled with broad-range amplification of bacterial sequences was used to determine whether a bacterial pathogen was associated with CFS. Plasma DNA from 34 CFS and 55 non-fatigued subjects was assessed to determine plasma DNA concentration and the presence of bacterial 16S ribosomal DNA (rDNA) sequences. 相似文献4.
Caroline Charpin Sandrine Guis Philippe Colson Patrick Borentain Jean-Pierre Mattéi Patrice Alcaraz Nathalie Balandraud Benoit Thomachot Jean Roudier René Gérolami 《Arthritis research & therapy》2009,11(6):R179-5
Introduction
Reactivation of hepatitis B virus (HBV) infection in patients with past infection has been described in 5% to 10% of individuals undergoing immunosuppressive therapies. No data are available to date on the outcome of patients treated by tumour necrosis factor-alpha (TNFα) inhibitors for chronic arthritis with a serological pattern of past HBV infection. The aim of our study was to monitor HBV markers in HBV surface antigen (HBsAg)-negative/anti-HBcAb-positive patients treated with a TNFα inhibitor for inflammatory arthritides. 相似文献5.
Franco Capsoni Anna Maria Ongari Eva Reali Anna Catania 《Arthritis research & therapy》2009,11(5):R151-8
Introduction
The melanocortin peptides have marked anti-inflammatory potential, primarily through inhibition of proinflammatory cytokine production and action on phagocytic cell functions. Gout is an acute form of arthritis caused by the deposition of urate crystals, in which phagocytic cells and cytokines play a major pathogenic role. We examined whether alpha-melanocyte-stimulating hormone (α-MSH) and its synthetic derivative (CKPV)2 influence urate crystal-induced monocyte (Mo) activation and neutrophil responses in vitro. 相似文献6.
Bogdan Galusca Ga?tan Prévost Natacha Germain Isabelle Dubuc Yiin Ling Youssef Anouar Bruno Estour Nicolas Chartrel 《PloS one》2015,10(3)
Context
Anorexia nervosa (AN) presents an adaptive appetite regulating profile including high levels of ghrelin and 26RFa (orexigenic) and low levels of leptin and PYY (anorexigenic). However, this adaptive mechanism is not effective in promoting food intake. The NPY/proopiomelanocortin (POMC) system plays a crucial role in the regulation of feeding behavior as NPY is the most potent orexigenic neuropeptide identified so far and as the POMC-derived peptide α-MSH drastically reduces food intake, and this peptidergic system has not been thoroughly studied in AN.Objective
The aim of the present study was thus to investigate whether a dysfunction of the NPY/POMC occurs in two populations with low body weight, AN and constitutional thinness (CT).Design and Settings
This was a cross-sectional study performed in an endocrinological unit and in an academic laboratory.Investigated Subjects
Three groups of age-matched young women were studied: 23 with AN (AN), 22 CT and 14 normal weight controls.Main Outcome Measures
Twelve-point circadian profiles of plasma NPY and α-MSH levels were measured in the three groups of investigated subjects.Results
No significant circadian variation of NPY was detected between the three groups. Plasma α-MSH levels were significantly lower in AN (vs controls) all over the day. The CT group, compared to controls, presented lower levels of α-MSH in the morning and the evening, and an important rise during lunchtime.Conclusion
In AN patients, the NPY system is not up-regulated under chronic undernutrition suggesting that this may play a role in the inability of anorectic women to adapt food intake to their energy demand. In contrast, low circadian α-MSH levels integrate the adaptive profile of appetite regulation of this disease. Finally, in CT women, the important α-MSH peak detected during lunchtime could explain why these patients are rapidly food satisfied. 相似文献7.
Matthias Majer James F Jones Elizabeth R Unger Laura Solomon Youngblood Michael J Decker Brian Gurbaxani Christine Heim William C Reeves 《BMC neurology》2007,7(1):40
Background
Complaints of unrefreshing sleep are a prominent component of chronic fatigue syndrome (CFS); yet, polysomnographic studies have not consistently documented sleep abnormalities in CFS patients. We conducted this study to determine whether alterations in objective sleep characteristics are associated with subjective measures of poor sleep quality in persons with CFS. 相似文献8.
Frank H Duffy Gloria B McAnulty Michelle C McCreary George J Cuchural Anthony L Komaroff 《BMC neurology》2011,11(1):82
Background
Previous studies suggest central nervous system involvement in chronic fatigue syndrome (CFS), yet there are no established diagnostic criteria. CFS may be difficult to differentiate from clinical depression. The study's objective was to determine if spectral coherence, a computational derivative of spectral analysis of the electroencephalogram (EEG), could distinguish patients with CFS from healthy control subjects and not erroneously classify depressed patients as having CFS. 相似文献9.
Elena Karnaukhova Yakir Ophir Loc Trinh Nimish Dalal Peter J Punt Basil Golding Joseph Shiloach 《Microbial cell factories》2007,6(1):34
Background
Human α1-proteinase inhibitor (α1-PI), also known as antitrypsin, is the most abundant serine protease inhibitor (serpin) in plasma. Its deficiency is associated with development of progressive, ultimately fatal emphysema. Currently in the United States, α1-PI is available for replacement therapy as an FDA licensed plasma-derived (pd) product. However, the plasma source itself is limited; moreover, even with efficient viral inactivation steps used in manufacture of plasma products, the risk of contamination from emerging viruses may still exist. Therefore, recombinant α1-PI (r-α1-PI) could provide an attractive alternative. Although r-α1-PI has been produced in several hosts, protein stability in vitro and rapid clearance from the circulation have been major issues, primarily due to absent or altered glycosylation. 相似文献10.
Introduction
TNFα is increased in the synovial fluid of patients with rheumatoid arthritis and osteoarthritis. TNFα activates mitogen-activated kinase kinase (MEK)/extracellular regulated kinase (ERK) in chondrocytes; however, the overall functional relevance of MEK/ERK to TNFα-regulated gene expression in chondrocytes is unknown. 相似文献11.
Wang H Ahrens C Rief W Gantz S Schiltenwolf M Richter W 《Arthritis research & therapy》2010,12(5):R186
Introduction
Patients with chronic low back pain (cLBP) have high rates of comorbid psychiatric disorders, mainly depression. Recent evidence suggests that depressive symptoms and pain, as interacting factors, have an effect on the circulating levels of inflammatory markers relevant to coronary artery disease. Our previous work showed a higher serum level of an inflammatory marker tumour necrosis factor-alpha (TNFα) in patients with cLBP, which did not correlate with intensity of low back pain alone. In the present study we investigated the cross-sectional associations of depressive symptoms, low back pain and their interaction with circulating levels of TNFα. 相似文献12.
In this study anti-inflammatory effects of the alpha-melanocyte stimulating hormone (α-MSH) on ocular inflammation caused
by extracapsular lens extraction (ECLE) have been investigated and the potential mechanism of an anti-inflammatory effect
is discussed. Pigmented rabbit eyes after ECLE were treated locally with α-MSH, dexamethasone, diclofenac, or saline 4 times
a day (q.i.d.) for 4 weeks. The inhibitory effect of α-MSH on infiltrating cells in the aqueous humor (AqH) was almost twice
as good as that of dexamethasone or diclofenac for 3 days, 1 week, and 2 weeks after the operation. The eyes of Sprague-Dawley
rats were treated with an intravenous injection of α-MSH or saline immediately after ECLE. Six hours postoperatively, the
iris/ciliary body exhibited increased expression of TNF-α and IL-6 mRNAs, which were significantly decreased after α-MSH treatment.
The number of activated NF-kappa B (NFκB)-positive cells in the iris/ciliary body was also significantly reduced by the α-MSH
treatment. These results suggested that α-MSH could effectively reduce ocular inflammation after ECLE, and the potential mechanism
for this is by down-regulating the expression of proinflammatory cytokines and inhibiting the NFκB-dependent signaling pathway. 相似文献
13.
William P Sheffield Louise J Eltringham-Smith Sharon Gataiance Varsha Bhakta 《BMC biotechnology》2009,9(1):15-11
Background
The plasma protein α2-antiplasmin (α2AP) is cross-linked to fibrin in blood clots by the transglutaminase factor XIIIa, and in that location retards clot lysis. Competition for this effect could be clinically useful in patients with thrombosis. We hypothesized that fusion of N-terminal portions of α2-antiplasmin to human serum albumin (HSA) and production of the chimeric proteins in Pichia pastoris yeast would produce a stable and effective competitor protein. 相似文献14.
Wim M.M. Schaaper Roger A.H. Adan Truus A. Posthuma Julia Oosterom Willem-Hendrik Gispen Rob H. Meloen 《International journal of peptide research and therapeutics》1998,5(2-3):205-208
Summary Cyclic lactam analogs of α-melanocyte stimulating hormone (α-MSH) have been shown to be potent agonists in the frog skin bioassay
[Al-Obeidi, F. et al., J. Med. Chem., 32 (1989) 2555], demonstrating melanocortin-1 (MC1) receptor activity. We synthesized
cyclic α-MSH(1–13) and α-MSH(4–10) lactam analogs. The peptides were synthesized using Fmoc chemistry. We improved the cyclization
procedure: side chains of Asp5 and Lys10 from the deprotected peptide were coupled in DMF to form a cyclic lactam, using an excess of PyBOP reagent and DIEA as a
base. The cyclization reaction was completed within 1 h and was almost quantitative. We also synthesized an α-MSH analog cyclized
via a disulphide bridge. The peptides were tested for their selectivity for the rat MC4 receptor. Cyclization and substitutions
at position 7 dramatically influenced the selectivity for the rMC4 receptor. 相似文献
15.
Philip B Wedegaertner 《BMC cell biology》2002,3(1):12-11
Background
Alternative mRNA splicing of αi2, a heterotrimeric G protein α subunit, has been shown to produce an additional protein, termed sαi2. In the sαi2 splice variant, 35 novel amino acids replace the normal C-terminal 24 amino acids of αi2. Whereas αi2 is found predominantly at cellular plasma membranes, sαi2 has been localized to intracellular Golgi membranes, and the unique 35 amino acids of sαi2 have been suggested to constitute a specific targeting signal. 相似文献16.
Introduction
Several studies have reported that TNFα is substantially increased within skin lesions of patients with discoid lupus erythematosus (DLE), subacute cutaneous lupus erythematosus (SCLE) and dermatomyositis (DM) compared to controls. Elevated TNFα has been reported in the sera of some patients with systemic lupus erythematosus, DLE and SCLE, but not in the sera of patients with DM. Because of the key pathogenic role of autoimmunity in these diseases, in this study we sought to evaluate TNFα production by a readily available source of immune cells (namely, peripheral blood mononuclear cells (PBMCs)) taken from controls and from patients with cutaneous lupus or DM. 相似文献17.
Michael D Hughes Erilda Kapllani Ashlynn E Alexander Robert D Burk Alan R Schoenfeld 《Cancer cell international》2007,7(1):13
Background
Mutational inactivation of the von Hippel-Lindau (VHL) tumor suppressor gene has been linked to hereditary as well as sporadic clear cell renal carcinomas. The product of the VHL gene, pVHL, acts to target hypoxia-inducible factor alpha (HIF-α) subunits for ubiquitination and subsequent degradation. Using an RNA interference approach to lower levels of HIF-2α in two different renal cell lines that lack functional pVHL, we have tested the contribution of HIF-2α toward cellular pVHL activities. 相似文献18.
Panos Pantelidis Deirdre S McGrath Anne Marie Southcott Carol M Black Roland M du Bois 《Respiratory research》2001,2(6):365-8
Background
Previous studies have revealed that tumour necrosis factor (TNF)-α is upregulated in fibrosing alveolitis (FA) in humans. The aim of this study was to compare the TNF-α secretory profile of alveolar macrophages (AMs) and peripheral blood monocytes (Mos) of patients with cryptogenic FA and systemic sclerosis (SSc), a rheumatological disorder in which lung fibrosis can occur. In particular, we wished to assess whether TNF-α levels differ between SSc patients with FA (FASSc) and a nonfibrotic group. 相似文献19.
Takakazu Oka Yoko Tamagawa Sota Hayashida Yuko Kaneda Naoki Kodama Sadatoshi Tsuji 《BioPsychoSocial medicine》2007,1(1):1-6
Background
The α-EEG anomaly during sleep, originally associated with chronic pain, is noted in several psychiatric and medical conditions and is also present in some normal subjects. The exact significance of the α-EEG anomaly is uncertain, but it has been suggested to be a nonspecific response to a variety of noxious stimuli. We propose that attachment insecurity, which is often associated with a state of hypervigilance during wakefulness, may be associated with the α-EEG anomaly during sleep. 相似文献20.
Laure Delavallée Luca Semerano Eric Assier Géraldine Vogel Grégoire Vuagniaux Marion Laborie Daniel Zagury Natacha Bessis Marie-Christophe Boissier 《Arthritis research & therapy》2009,11(6):R195