Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0011570 (depression)
 172,036 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Blood-based tests for the differential diagnosis of Alzheimer's disease (AD) are under intensive investigation and have shown promising results with regard to Abeta40 and Abeta42 peptide species in incipient AD. Moreover, plasma Abeta40 was suggested as an independent cerebrovascular risk factor candidate. These considerations prompted us to analyse a total of 72 plasma samples in vascular dementias (VAD, n = 15), AD with cerebrovascular disease (AD with CVD, n = 7), AD (n = 15), Parkinson's disease and Parkinson's disease dementia (PD/PDD, n = 20) and 15 patients with depression that served as controls (DC) for distinct plasma amyloid-beta (Abeta) peptide patterns. For the analysis of plasma we used immunoprecipitation followed by the quantitative Abeta-SDS-PAGE/immunoblot. For comparison, CSF tau and Abeta1-42 analyses were performed. The major outcome was an increase in Abeta1-40 in plasma of VAD paralleled by a decrease in the ratio of Abeta1-38/Abeta1-40. The ratio Abeta1-38/Abeta1-40 in plasma enabled contrasts of beyond 85% and 80% for discriminating VAD from DC and all other patients, respectively. In CSF, we confirmed the typical CSF biomarker constellation of increased tau and diminished Abeta1-42 levels for AD. The diagnostic accuracy of plasma Abeta1-38/Abeta1-40 for VAD resembled the accuracy of CSF biomarkers for AD. From the presented results, we consider the ratio of plasma Abeta1-38/Abeta1-40 peptides to be a blood-based biomarker candidate for VAD.
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PMID:Blood-based neurochemical diagnosis of vascular dementia: a pilot study. 1766 50

Direct, dose dependent effects of the nose-horned vipers (Vipera ammodytes ammodytes) venom on various parameters of cardiac action in isolated rat hearts were examined. Biochemical (protein content, SDS polyacrylamide gel electrophoresis) and biological (minimum haemorrhagic and necrotizing dose and lethal dose (LD(50))) characterization of the venom was performed before testing. The hearts were infused with venom doses of 30, 90 and 150 microg/mL for 10 min followed by 30 min of wash out period. Left ventricular pressure, coronary flow, heart rate, atrioventricular conduction, myocardial oxygen consumption, incidence and duration of arrhythmias were measured and relative cardiac efficiency was calculated. Cardiac CPK, LDH, AST and troponin I were measured as biochemical markers of myocardial damage. The venom caused dose dependent electrophysiological instability and depression of contractility and coronary flow. Effects on the heart rate were biphasic; transient increase followed by significant slowing of the frequency. Relative cardiac efficiency decreased as oxygen consumption remained high relative to the heart rate-contractility product, indicating purposeless expenditure of oxygen and energy. Effects by the dose of 30 microg/mL were highly reversible while the dose of 90 mug/mL caused damages that were mostly irreversible. The dose of 150 mug/mL induced irreversible asystolic cardiac arrest.
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PMID:Dose dependent effects of standardized nose-horned viper (Vipera ammodytes ammodytes) venom on parameters of cardiac function in isolated rat heart. 1831 64

The relationship between the ability of repeated desipramine treatment to cause downregulation of the norepinephrine transporter (NET) and produce antidepressant-like effects on behavior was determined. Treatment of rats with 15 mg/kg per day desipramine reduced NET expression, measured by (3)H-nisoxetine binding and SDS-PAGE/immunoblotting, in cerebral cortex and hippocampus and reduced the time of immobility in the forced-swim test. The antidepressant-like effect on forced-swim behavior was evident 2 days following discontinuation of desipramine treatment when plasma and brain levels of desipramine and its major metabolite desmethyldesipramine were not detectable. Reduced NET expression resulted in reduced norepinephrine uptake, measured in vitro, and increased noradrenergic neurotransmission, measured in vivo using microdialysis. Overall, the dose-response and time-of-recovery relationships for altered NET expression matched those for production of antidepressant-like effects on behavior. The importance of increased noradrenergic neurotransmission in the persistent antidepressant-like effect on behavior was confirmed by demonstrating that it was blocked by inhibition of catecholamine synthesis with alpha-methyl-p-tyrosine. The present results suggest an important role for NET regulation in the long-term behavioral effects of desipramine and are consistent with clinical data suggesting that enhanced noradrenergic neurotransmission is necessary, but not sufficient, for its antidepressant actions. Understanding the mechanisms underlying NET regulation in vivo may suggest novel targets for therapeutic intervention in the treatment of depression.
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PMID:Norepinephrine transporter regulation mediates the long-term behavioral effects of the antidepressant desipramine. 1841 64

Disgust has been linked to several psychopathologies, although a role in depression has been questioned. However, it has recently been proposed that rather than general disgust sensitivity, disgust directed toward the self (self-disgust) may influence the development of depression, providing a causal link between dysfunctional cognitions and depressive symptomatology. This possibility was examined by developing a scale to measure self-disgust (the Self-Disgust Scale; SDS) and then using mediator analysis to determine if self-disgust was able to explain the relationship between dysfunctional cognitions (measured with the use of the Dysfunctional Attitudes Scale) and depressive symptomatology (measured with the use of the Beck Depression Inventory and the Depression, Anxiety and Stress Scale). The developed SDS was found to exhibit a high level of internal consistency, test-retest reliability, and concurrent validity. Principal-components analysis revealed two factors to underlie responses to SDS items: the 'Disgusting self,' concerned with enduring, context independent aspects of the self, and 'Disgusting ways,' concerned with behavior. Self-disgust was found to mediate the relationship between dysfunctional cognitions and depressive symptomatology, demonstrating for the first time that self-disgust plays a role in depression.
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PMID:Self-disgust mediates the relationship between dysfunctional cognitions and depressive symptomatology. 1854 Jul 53

Caregiving to a family member with advanced cancer can be stressful. Stress leads to psychological changes, oxidative stress and increased glomerular permeability to proteins. To find out their association with stress, we assessed anxiety and depression by the hospital anxiety and depression scale (HADS), urinary malondialdehyde:creatinine ratio (UMDA:Cr), urinary protein:creatinine ratio (UP:Cr) and SDS-polyacrylamide gel electrophoresis (SDS-PAGE) profile of urinary proteins in 31 family caregivers of advanced cancer patients and 31 matched controls. HADS, UMDA:Cr and UP:Cr were significantly higher in the caregivers as compared to the controls. These parameters were significantly correlated. Besides an increase in albumin excretion, a few higher and lower molecular weight proteins were detected in the urine of caregivers. These results indicate that the family caregivers of advanced cancer patients undergo anxiety and depression associated with stress leading to increased oxidative stress and glomerular permeability to proteins. These changes might have health implications, warranting appropriate stress management counseling for them.
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PMID:Evaluation of anxiety, depression and urinary protein excretion among the family caregivers of advanced cancer patients. 1858 69

In our biomarker identification efforts, we have reported earlier on a protein that differs in its electrophoretic mobility between mouse lines bred either for high or low trait anxiety. The altered electrophoretic behavior of enolase phosphatase (EP) is now identified to be caused by two single-nucleotide polymorphisms. In both cases, the genetic polymorphism introduces an amino acid change in the protein's sequence resulting in differential mobility on SDS gels. This was shown by recombinantly expressing the two EP isoforms. Functional studies indicate that the EP isoform from the high anxiety mouse line has a lower enzymatic activity than does its low anxiety mouse counterpart. EP is a member of the methionine salvage pathway that is responsible for the synthesis of S-adenosyl-L-methionine, a natural compound with potential antidepressant activities. In addition, it is linked to the polyamine pathway whose members have functions in anxiety/depression-related behaviors. In a freely-segregating F2 panel, both single-nucleotide polymorphisms were significantly associated with locomotion-independent trait anxiety, further supporting a functional role of EP for this phenotype. The study shows that proteomic analysis can reveal genotypic differences relevant for the phenotype. The identified protein alterations, in turn, can expose metabolic pathways pertinent to the behavioral phenotype.
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PMID:Proteomic-based genotyping in a mouse model of trait anxiety exposes disease-relevant pathways. 1913 48

In this study we compared the levels of interleukin (IL)-6, IL-8, IL-10 and tumor necrosis factor-alpha (TNF-alpha) in population samples characterized by a high or low level of self-reported depression. We measured serum IL-6, IL-8, IL-10 and TNF-alpha in two cohorts which differed in scoring on the Zung Self-Rating Depression Scale (ZSDS). The group with a high score in ZSDS (average SDS index = 62.9) was called DEP (n=27), the group with a low score in ZSDS (average SDS index = 29.9) was called NDEP (n=16). The groups did not significantly differ in age, waist circumference and body mass index. For the assessment of serum cytokine levels multiplex immunoanalytic xMAP(LUMINEX) technology was used. We found lower IL-6 in the DEP group (medians; DEP 4.08 pg/ml vs. NDEP 6.11 pg/ml) on the border of statistical significance in multiple regression analysis (p=0.049). Serum levels of all other studied cytokines were not significantly different (medians; IL-8: DEP 2.18 pg/ml vs. NDEP 2.61 pg/ml; IL-10: DEP 2.85 pg/ml vs. NDEP 2.94 pg/ml; TNF-alpha: DEP 2.32 pg/ml vs. NDEP 2.30 pg/ml). These results are in contradiction to the prevailing opinion that pro-inflammatory cytokine levels are elevated in people with symptoms of depression.
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PMID:Lower serum levels of interleukin-6 in a population sample with symptoms of depression than in a population sample without symptoms of depression. 1924 13

Cancer diagnosis and treatment often produce psychologic stresses resulting from the actual symptoms of the disease, as well as from perceptions of the disease and its stigma. Depression is seen in many cancer patients. Depression occurs in approximately 25% of palliative care patients. It is widely recognised by clinicians that depression is a difficult symptom to identify amongst patients with advanced illness. The study is aimed for screening of depression among palliative care female patients. This study was local, prospective and cross-sectional. It was carried at Department of Clinical Oncology and Radiation Therapy of Charles University Hospital in Hradec Kralove, Czech Republic. Dates were obtained during year 2007 - 2008 in 64 palliative care female patients. The mean age for all 64 subjects was 60,5 years old (aged 29 - 88 years old). The Czech version of Zung self-rating depression scale was performed. The statistical evaluation presents that mean SDS (self-rating depression score) certifies the presence of signs of mildly depression among palliative care female patients (SDS range was 50-59). The mean SDS in all subjects was 56. The mean SDS in group of healthy females was 38,9 (normal range). The incidence of depression is 71,8% (46 of all 64 subjects). The relevance of depression is characterized: severely depressed was proved in 8 of all 46 subjects, the moderately depressed in 21 subjects of all 46 subjects and mildly depressed in 17 of all 46 subjects. The statistical evaluation not presents statistically significant dependence of SDS on smoking abuse, marital status, age, number of associated diseases and type of palliative care. The statistical evaluation presents that patients with cancer of lung, with cancer of endometrium, with cancer of gallbladder and with melanomas are moderately depressed (SDS 60-69), patients with cancer of ovary, with cancer of breast, with primary brain tumour, with cancer of ventricle, with cancer of pancreas head and with cancer of bucall cavity are mildly depressed (SDS 50-59). The results show that subsists clear association between oncological disease in palliative care and depression.
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PMID:Cancer and depression: a prospective study. 1930 20

Chemically cross-linked poly(N-isopropylacrylamide) (PNIPAM) microgels and PNIPAM with different amounts of acrylic acid groups (PNIPAM-co-PAA) were synthesized and the temperature-induced aggregation behaviors of aqueous suspensions of these microgels were investigated mainly with the aid of dynamic light scattering (DLS) and turbidimetry. The DLS results show that the particles at all conditions shrink at temperatures up to approximately the lower critical solution temperature (LCST), but the relative contraction effect is larger for the microgels without acid groups or for microgels with added anionic surfactant (SDS). A significant depression of the cloud point is found in suspensions of PNIPAM with very low concentrations of SDS. The compression of the microgels cannot be traced from the turbidity results, but rather the values of the turbidity increase in this temperature interval. This phenomenon is discussed in the framework of a theoretical model. At temperatures above LCST, the size of the microgels without attached charged groups in a very dilute suspension is unaffected by temperature, while the charged particles (pH 7 and 11) continue to collapse with increasing temperature over the entire domain. In this temperature range, low-charged particles of higher concentration and particles containing acrylic acid groups at low pH (pH 2) aggregate, and macroscopic phase separation is approached at higher temperatures. This study demonstrates how the stabilization of microgels can be affected by factors such as polymer concentration, addition of ionic surfactant to particles without charged acid groups, amount of charged groups in the polymer, and pH.
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PMID:Effects of temperature and pH on the contraction and aggregation of microgels in aqueous suspensions. 1961 21

The Patient Education Program Parkinson (PEPP) is a standardized psychosocial intervention aiming at improving the health-related quality of life (Hr-Qol) of patients with Parkinson's disease (PD) and caregivers. A randomized controlled trial was performed to assess its effectiveness. Sixty-four PD patients and 46 caregivers were allocated to either the intervention group (PEPP) or the control group (usual care). The intervention consisted of eight weekly sessions of 90-minute duration. Assessments were performed on psychosocial problems (BELA-P/A-k), Hr-Qol (PDQ-39/EQ-5D) and depression (SDS) at baseline and one week after the end of the PEPP. Participants rated their mood on a visual analogue scale before and after each session. A significant effect for the caregivers on psychosocial problems and need for help was found and a trend for significance for patients' quality of life. Patients' and caregivers' mood improved significantly after each session. This study provides indications that PD patients and caregivers benefit from the PEPP.
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PMID:The benefits of a standardized patient education program for patients with Parkinson's disease and their caregivers. 1967 27


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