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PubMed2006

The time-profile of the PBMC HSP70 response to in vitro heat shock appears temperature-dependent.

Heat shock proteins (HSPs) are synthesised by cells subsequent to a stress exposure and are known to confer protection to the cell in response to a second challenge. HSP induction and decay are correlated to thermotolerance and may therefore be used as a biomarker of thermal history. The current study tested the temperature-dependent nature of the heat shock response and characterised its time profile of induction. Whole blood from 6 healthy males (Age: 26 +/- (SD) 2 yrs; Body mass 74.2 +/- 3.8 kgs; VO(2max): 49.1 +/- 4.0 ml.kg(-1).min(-1)) were isolated and exposed to in vitro heat shock (HS) at 37, 38, 39, 40, and 41 degrees C for a period of 90 min. After HS the temperature was returned to 37 degrees C and intracellular HSP70 was quantified from the leukocytes at 0, 2, 4, and 6 h after heat treatment. The concentration of HSP70 was not different between temperatures (P > 0.05), but the time-profile of HSP70 synthesis appeared temperature-dependent. At control (37 degrees C) and lower temperatures (38-39 degrees C) the mean HSP70 concentration increased up to 4 h post HS (P < 0.05) and then returned towards baseline values by 6 h post HS. With in vitro hyperthermic conditions (40-41 degrees C), the time-profile was characterised by a sharp rise in HSP70 levels immediately after treatment (P < 0.05 for 40 degrees C at 0 h), followed by a progressive decline over time. The results suggest a temperature-dependent time-profile of HSP70 synthesis. In addition, the temperature at which HSP70 is inducted might be lower than 37 degrees C.

Adult↗

PubMed2004

Differentiating the behavioural profile in autism and mental retardation and testing of a screener.

In order to differentiate the behavioural profiles in autism and mental retardation and to cross-validate a behavioural autism screen, 84 subjects with autism (64 males and 20 females) with a mean age of 10 years selected from a Swiss national survey were compared to a control group of 84 subjects matched by age and gender with mental retardation, but without autistic features. The behavioural profile was assessed using the Developmental Behaviour Checklist (DBC). The behavioural profile in autism, in contrast to mental retardation, was marked by higher scores in the domains of disruptive, self-absorbed, communication disturbed, anxious and autistic behaviour, and a higher total DBC score. Furthermore, a higher vulnerability for behavioural abnormalities became evident for females with autism. A recently proposed DBC-Autism Screen was cross-validated, and a slight extension of the screen led to even higher correct classification rates. It was concluded that the DBC is a suitable instrument for the assessment of the behavioural profile and for screening in autism.

Autistic Disorder↗

PubMed2004

Developmental profiles on the basis of the FTF (Five to Fifteen) questionnaire-clinical validity and utility of the FTF in a child psychiatric sample.

The Five to Fifteen parent questionnaire (FTF) was developed to offer a neuropsychological dimension to the assessment of children with Attention Deficit/Hyperactivity Disorder and other child psychiatric disorders. The domains included in the FTF were motor skills, executive functions, perception, memory, language, social skills and learning, in addition to a domain for emotional and behavioural problems. The aim of the present study was to test the clinical validity and utility of the FTF with a main focus on discriminant and criterion validity. The clinical sample consisted of 155 clinically diagnosed children (ICD-10 criteria), 102 were tested with WISC-III. The parents rated their children independent of the diagnostic evaluation. The results were presented as profiles. These clinical profiles were compared to those of a Swedish norm sample consisting of 854 children from the age of five to fifteen. Results demonstrated that the profiles for the clinical groups were similar in forms and levels to those of the upper 10 percent of the norm sample (those with most difficulties). Five out of eight FTF domains discriminated significantly between diagnostic groups in the clinical sample. Influence of IQ, gender and age on the results were low. Three out of four relevant FTF domains correlated significantly with corresponding WISC-III indexes/measures. The clinical utility of individual children's profiles were demonstrated. On the whole, the findings supported the clinical validity and utility of the FTF.

Attention Deficit Disorder with Hyperactivity↗

PubMed2005

[Prognosis of the facial profile line using the finite element method].

AIM: The aim of the present study was to verify how realistic the prediction of the clinical appearance of the patient's profile is by using the finite element method to simulate orthodontic and surgical intervention. MATERIAL AND METHOD: This single-case study explains step by step interdisciplinary treatment planning in a case with angle class III. Orthodontic and surgical procedures can be simulated and visualized using the lateral cephalogram and the Onyx Ceph software. The facial profile line is calculated over the skeletal surface using the finite element method. The morphing feature of the Onyx Ceph software is used to create an image of the predicted appearance of the patient's profile using a preoperative lateral photograph. RESULTS: The comparison of the simulated profile and the clinical result after bimaxillary surgery showed high concordance. CONCLUSION: The finite element method represents a useful tool for the prediction of the postoperative appearance in patients undergoing fixed orthodontic appliance and orthognathic surgery.

Adult↗

PubMed2003

Influence of the spatial beam profile on hard tissue ablation. Part I: Multimode emitting Er:YAG lasers.

Uniform dosimetry is a prerequisite for reproducible laser applications in research and practice. The light-tissue interaction is dependent on the absorbed energy (J) per unit of time (tau) in the case of pulsed lasers, and on the absorbed power (W) per unit of volume (e.g. mm3) in the case of continuous-wave (cw) lasers, and thus directly dependent on the energy distribution within the laser beam. Consequently, precise knowledge of the spatial beam profile, and of the pulse duration and treatment time, is indispensable. The objective of this paper was a theoretical study of the impact of different mode profiles on energy distribution in the beam. Also examined was the question of the influence of changes in the laser parameters on the mode structure. Three erbium:YAG lasers (lambda=2.94 microm) were used for this purpose. The transversal mode structure of the lasers was observed by irradiating thermal paper and verified by means of calculations. The effect induced in the mode profile by changing the pulse energy and pulse repetition rate was investigated. The results of the tests show that changes in the laser parameters result in jumps in the transversal modes and associated energy distributions in the beam. The experiments confirm that simply changing the transversal modes has a substantial effect on the threshold energy required for the ablation of dental enamel (50 mJ with TEM00, 22.6 mJ with TEM31). In practice, inhomogeneity makes it impossible to determine the irradiated area in order to calculate the energy or power density. In addition, the energy distribution in the beam changes as a result of variation of the laser output energy and the pulse repetition rate. Consequently, simply measuring the beam diameter yields a totally incorrect result for the applied flux density when using a beam profile with a relatively high mode.

Dental Enamel↗

PubMed2026

Oral and gut microbiota profiles in patients with locally advanced rectal cancer with varying responses to neoadjuvant chemoradiotherapy.

Recent research has focused on gut bacteria in colorectal cancer, but the influence of other microbiota, including oral and nonbacterial gut microbiota, on treatment efficacy remains insufficiently explored. This study aimed to investigate their relationship with the efficacy of neoadjuvant chemoradiotherapy (nCRT) in locally advanced rectal cancer (LARC). Saliva and fecal samples were collected from patients with LARC before treatment. Shotgun metagenomic sequencing was used to profile bacterial, archaeal, eukaryotic, and viral taxonomic groups and to examine oral and gut microbial functions. An artificial intelligence-based prediction model was developed by integrating oral and gut microbiome data with clinical information. Statistical analyses compared diversity and response-associated microbial features between responders and non-responders to nCRT. Response-associated differences were observed in bacterial and nonbacterial taxonomic profiles and in oral and gut microbial functional profiles. In the internal test subset, the integrated analysis yielded an observed AUC of 0.917. Given the small cohort and the exploratory comparison of candidate classifiers, this estimate requires confirmation in larger, independent cohorts. Baseline oral and gut microbiome profiles were associated with response to nCRT. Integrating microbiome and clinical features showed potential for response prediction, but the model remains exploratory and requires validation in larger, independent cohorts before clinical application. Retrospectively registered on 01/08/2026, NCT07346729.

Aged↗

PubMed2001

Informational masking in profile analysis: comparing ideal and human observers.

Predictions from an ideal observer model are compared with human thresholds for two profile analysis tasks. Past work has shown that ideal observer models reasonably account for human thresholds when the profile components are fixed in frequency and amplitude. Randomly varying the frequencies of the tones making up the profile leads to higher thresholds. Owing in part to large interobserver variation, the ideal observer model is not successful in accounting for the pattern of psychophysical thresholds associated with increases in frequency uncertainty. The ideal observer also fails to account for the results of a recent profile analysis experiment in which amplitude randomization was studied [Lentz JJ, Richards VM: J. Acoust. Soc. Am. 102: 535-541, 1998]. Overall, the ideal observer predicts smaller effects of uncertainty on thresholds than are observed in psychophysical experiments.

Auditory Perception↗

PubMed2004

Atherogenic lipid profile and elevated lipoprotein (a) are associated with lower bone mineral density in early postmenopausal overweight women.

Epidemiological studies have reported that women with osteoporosis present an increased risk of cardiovascular events and that lipid lowering therapy (statins) could be associated with a decreased risk of fracture. We investigated whether women with atherogenic lipid profile have lower lumbar and femoral bone mineral density (BMD) and higher prevalence of osteopenia than those with normal lipid levels. The study included 52 overweight early postmenopausal women, with no history of hormone replacement therapy, or any current or past pathology or treatment that could alter bone or lipid metabolism. Atherogenic lipid profile or hyperlipidemia was defined as hypercholesterolemia (> or = 240 mg/dl) or high low-density lipoprotein cholesterol (high-LDLc > or = 160 mg/dl) or high lipoprotein (a) [high-Lp (a) > or =25 mg/dl], and low-BMD as t-score <-1 SD at lumbar o femoral site. The results show that women with hyperlipidemia had lower mean-adjusted BMD (mean+/-SEM) at lumbar (0.865+/-0.020 vs. 0.958+/-0.028 g/cm2, p = 0.007) and femoral neck (0.712+/-0.015 vs. 0.796+/-0.021, p = 0.004 g/cm2) than those with normal lipid levels. Hypercholesterolemia group had higher prevalence of low-BMD at lumbar spine (82.6% vs. 55.2%, p = 0.04, OR: 3.8; 95% CI: 1.04-14.2) and femoral neck (65.2% vs. 37.9%, p = 0.05, OR: 3.1; 95% CI: 0.98-9.6). The high-LDLc group had also higher prevalence low-BMD at femoral neck (75% vs. 39%, p = 0.01, OR: 4.7; 95% CI: 1.26-17.5), and the high-Lp (a) group at lumbar spine (87% vs. 51.7% p = 0.007, OR: 6.2; 95% CI: 1.5-25.6). Women with hyperlipidemia had higher prevalence of low BMD at lumbar spine (81.8% vs. 42.1%, p = 0.003, OR: 6.2; 95% CI: 1.7-22) and femoral neck (60.6% vs. 31.6%, p = 0.04, OR: 3.3; 95% CI: 1.01-11.0). In conclusion, early postmenopausal women with atherogenic lipid profile, defined as cholesterol > or =240 mg/dl or LDLc > or = 160 mg/dl or Lp(a) > or = 25 mg/dl have lower lumbar and femoral BMD and have an increased risk of osteopenia than those with normal lipid profile, suggesting that hyperlipidemia could be associated with osteoporosis and bone status should be evaluated in women with hyperlipidemia.

Absorptiometry, Photon↗

PubMed2005

Association between hemodynamic profile during laboratory stress and ambulatory pulse pressure.

Hemodynamic responses underlying blood pressure reactivity to laboratory stress are theoretically linked to cardiovascular pathophysiology. The present study investigated whether a vascular response predicted ambulatory pulse pressure, a known risk factor for cardiovascular disease. A new model of hemodynamic profile, previously developed by the authors, was applied to 24-h ambulatory data from 30 female and 34 male healthy young adults. Of these, 40 were monitored during a naturalistic stressor (university examination). For females, hemodynamic profile significantly predicted nighttime systolic blood pressure, and 24-h, day-, and nighttime diastolic blood pressure, but not ambulatory pulse pressure. A vascular or mixed hemodynamic profile significantly predicted 24-h and daytime ambulatory pulse pressure in males. The findings are consistent with theories of pathogenic mechanisms involving vascular changes and suggest that, for males, a vascular or mixed hemodynamic profile measured during laboratory stress may be a risk marker for cardiovascular disease, by its association with ambulatory pulse pressure.

Adult↗

PubMed2005

Comparative investigation of the volatile urinary profiles in different Phodopus hamster species.

Stir bar sorptive extraction method was used for investigation of the urinary volatile profiles in male and female Phodopus campbelli and Phodopus sungorus hamsters. Additionally, female Phodopus roborowsky urinary profiles were characterized. A quantitative analytical approach allowed comparisons of 17 selected compounds in urine. Results showed that campbelli and sungorus species show similar urinary volatile profiles for males and females. Differences appeared only in concentrations. Several unique compounds, such as pyrazine derivatives, were found to be gender-and age-specific. P. roborowsky females exhibited a completely different urinary volatile profile from campbelli and sungorus females, featuring a unique set of substituted quinoxalines.

Animal Communication↗

PubMed2005

Surgeons' economic profiles: can we get the "right" answers?

Hospitals and payers use economic profiling to evaluate physician and surgeon performance. However, there is significant variation in the data sources and analytic methods that are used. We used information from a hospital's cardiac surgery and cost accounting information systems to create surgeon economic profiles. Three scenarios were examined: (1) surgeon modeled as fixed effect with no patient-mix adjustment; (2) surgeon modeled as fixed effect with patient-mix adjustment; (3) and surgeon modeled as random effect with patient-mix adjustment. We included 574 patients undergoing coronary artery bypass surgery at Baptist Medical Center, Oklahoma City, OK between July 1, 1995 and April 30, 1996. We found that profiles reporting unadjusted average surgeon costs may incorrectly identify high- and low-cost outliers. Adjusting for patient-mix differences and treating surgeons as random effects was the preferred approach. These results demonstrate the need for hospitals to reexamine their economic profiling methods.

Aged↗

PubMed2007

Profile information matrix for nonlinear transformation models.

For semiparametric models, interval estimation and hypothesis testing based on the information matrix for the full model is a challenge because of potentially unlimited dimension. Use of the profile information matrix for a small set of parameters of interest is an appealing alternative. Existing approaches for the estimation of the profile information matrix are either subject to the curse of dimensionality, or are ad-hoc and approximate and can be unstable and numerically inefficient. We propose a numerically stable and efficient algorithm that delivers an exact observed profile information matrix for regression coefficients for the class of Nonlinear Transformation Models [A. Tsodikov (2003) J R Statist Soc Ser B 65:759-774]. The algorithm deals with the curse of dimensionality and requires neither large matrix inverses nor explicit expressions for the profile surface.

Algorithms↗

PubMed2006

The evaluation of coagulation profiles in calves with suspected septic shock.

The purpose of the study reported here was to evaluate the haemostatic function in calves with suspected septic shock and to reflect the occurrence of disseminated intravascular coagulation (DIC). Twenty-six calves suspected of having septic shock (experimental group) and 10 clinically healthy calves (control group) were used. On admission, the experimental group of calves had been ill for an average of 2 days. Therapy was applied to the experimental group of calves. The packed cell volume (PCV), haemoglobin (Hb), white blood cell (WBC), red blood cell (RBC) and platelet (PLT) counts were determined. Blood smears for toxic neutrophil and schistocyte intensity were evaluated. For the coagulation profile, plasma activated partial thromboplastin time (APTT), prothrombin time (PT), thrombin time (TT), fibrinogen and fibrin/fibrinogen degradation products (FDPs) values were determined. Toxic neutrophils in blood smears were observed in 12 calves of the experimental group. APTT was prolonged in the experimental group compared with the control group (p < 0.05). Fibrinogen concentration was found to be higher in the experimental group than in the control group (p < 0.001). Total leukocyte counts were higher in the experimental group compared with the control group (p < 0.01). Platelet counts in the experimental group were lower than the control group (p < 0.001). However, when the individual values of coagulation profiles of each calf were evaluated, 8 calves had at least three abnormal coagulation profiles (APTT >72 s, PT >34.5 s, TT >33.7 s, FDPs >5 microg/ml, PLT < or = 150 x 10(3)/mm(3)) and abnormal erythrocyte morphology (schistocytes > or = 1). The most common abnormal tests in the coagulation profile were APTT and PT (7 cases), FDPs (6 cases), thrombocytopenia (4 cases), and schistocytes in blood smears (8 cases) in these 8 calves. The results of this study indicate that DIC might be a significant risk factor for mortality in calves with suspected septic shock.

Animals↗

PubMed2000

Follow-up of the delta4 to delta16 trans-18:1 isomer profile and content in French processed foods containing partially hydrogenated vegetable oils during the period 1995-1999. Analytical and nutritional implications.

A survey of the total content of trans-18:1 acids and their detailed profile in French food lipids was conducted in 1995-1996, and 1999. For this purpose, 37 food items were chosen from their label indicating the presence of partially hydrogenated vegetable oils (PHVO) in their ingredients. The content as well as the detailed profile of these isomers was established by a combination of argentation thin-layer chromatography and gas liquid chromatography (GLC) on long polar capillary columns. With regard to the mean trans-18:1 acid contents of extracted PHVO, a significant decrease was observed between the two periods, i.e., from 26.9 to 11.8% of total fatty acids. However, only minor differences were noted in the mean relative distribution profiles of individual trans-18:1 isomers with ethylenic bonds between positions delta4 and delta16 for the two periods. The predominant isomer was delta9-18:1 (elaidic) acid, in the wide range 15.2-46.1% (mean, 27.9+/-7.2%) of total trans-18:1 acids, with the delta10 isomer ranked second, with a mean of 21.3% (range, 11.6 to 27.4%). The content of the unresolved delta6 to delta8 isomer group was higher than the delta11 isomer (vaccenic acid), representing on average 17.5 and 13.3%, respectively. Other isomers delta4, delta5, delta12, delta13/delta14, delta15, and delta16, were less than 10% each: 1.0, 1.6, 7.4, 7.1, 1.8, and 1.0%, respectively. However, considering individual food items, it was noted that none of the extracted PHVO were identical to one another, indicating a considerable diversity of such fats available to the food industry. A comparison of data for French foods with similar data recently established for Germany indicates that no gross differences occur in PHVO used by food industries in both countries. Estimates for the absolute mean consumption of individual isomers from ruminant fats and PHVO are made for the French population and compared to similarly reconstructed hypothetical profiles for Germany and North America. Differences occur in the total intake of trans-18:1 acids, but most important, in individual trans-18:1 isomer intake, with a particular increase of the delta6-delta8 to delta10 isomers with increasing consumption of PHVO. It is inferred from the present and earlier data that direct GLC of fatty acids is a faulty procedure that results (i) in variable underestimates of total trans-18:1 acids, (ii) in a loss of information as regards the assessment of individual isomeric trans-18:1 acids, and (iii) in the impossibility of comparing data obtained from human tissues if the relative contribution of dietary PHVO and ruminant fats is not known.

Chromatography, Gas↗

PubMed2004

Fatty acid profile and affective dysregulation in irritable bowel syndrome.

Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder with a high co-occurrence with affective dysregulation. Affective disorders have been associated with specific changes in the PUFA and cholesterol profile. In IBS, similar changes may be present as have been reported in patients with affective disorders. This exploratory study investigates (i) the level of affective dysregulation (AD) in IBS patients and healthy controls; (ii) PUFA and cholesterol profiles in IBS patients compared with controls; and (iii) associations between PUFA and cholesterol parameters with the level of AD. Blood samples were obtained for determination of the FA composition of plasma phospholipids and serum cholesterol in 23 diarrhea-predominant IBS patients and 23 healthy matched controls. AD was scored using the Symptom Check List depression scale, the Hospital Anxiety and Depression Scale, and the Hamilton Depression Rating Scale. The level of AD was higher in IBS patients compared with controls. PUFA and cholesterol profiles did not differ significantly between groups. Total n-3 PUFA and cholesterol were significantly negatively associated and the ratio of n-6 to n-3 PUFA and the ratio of arachidonic acid to EPA were significantly positively associated with the level of AD. The findings of the present study reveal that AD was higher in IBS patients compared with healthy controls and that changes in PUFA and cholesterol profiles were significantly associated with the level of AD. These results warrant further studies regarding the role of PUFA and cholesterol status in the co-occurrence of AD and functional gastrointestinal disorders.

Adult↗

PubMed2025

Amino acid profiles, aging, and sex hormone interactions in the elderly Iranian population: a metabolomics study.

BACKGROUND: Aging and sex hormones significantly influences on metabolic profiles, particularly in individuals aged 50 year and older. This study aimed to investigate the associations between serum metabolites, aging, and sex hormone levels among elderly individuals in Bushehr, Iran - a coastal region characterized by a unique lifestyle, dietary patterns, and environmental conditions, such as high seafood consumption and exposure to marine climate, which may collectively influence metabolic profiles and hormone levels in the aging population. METHODS: This cross-sectional study analyzed data from the Bushehr Elderly Health Program, which included 2001 participants (1143 women and 858 men) aged over 50 years old from Bushehr, Iran. Serum levels of 20 amino acids were measured using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and the results were analyzed based on gender, age, menopause status, menopause age, and serum levels of sex hormones such as follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone, and estradiol (E2). Statistical analyses were performed using SPSS version 25.0 and R version 4.0.3, with a focus on gender differences and the correlation between aging, sex hormones, and metabolite profiles. RESULTS: Among the 2001 participants, mean ages were 61.57 ± 7.6 years for women and 62.92 ± 8.4 years for men. Men had higher serum levels of glutamic acid, leucine, methionine, phenylalanine, tyrosine, valine, citrulline, ornithine, proline, threonine, histidine, lysine, tryptophan, asparagine, and glutamine, while women had higher levels of glycine and serine. Aging was associated with notable changes in amino acid levels, such as increased citrulline and decreased threonine in women, and similar trends in men with a pronounced decrease in alanine. In men, low testosterone levels were linked to reduced concentration of alanine, methionine, phenylalanine, tyrosine, citrulline, glycine ornithine, serine, lysine, asparagine, and glutamine. Postmenopausal women showed a significant decrease in threonine levels. DISCUSSION: The findings highlight the complex interplay between aging, sex hormones, and metabolic changes. Gender-specific differences in amino acid profiles suggest that sex hormones play a pivotal role in modulating metabolism, which may influence susceptibility to metabolic disorders. These insights could inform the development of targeted interventions tailored to the specific needs of aging populations. Future research should investigate the underlying mechanisms linking sex hormones to metabolic pathways and assess their potential for improving health outcomes in older adults.

Aging↗

PubMed1994

Flow velocity profile of the fetal aortic isthmus through normal gestation.

Experimental and clinical evidence have demonstrated that an increase in resistance to placental blood flow causes changes in aortic isthmic diastolic flow profile before any significant modification is observed in umbilical artery Doppler waveforms. To identify these abnormal flow profiles, the objective of this study was to document the normal flow profile in the aortic isthmus throughout pregnancy. The study included 81 normal fetuses from 17 to 39 weeks of gestation. On the isthmic flow profile, an index, named the balance index, was calculated: (peak systolic--end-diastolic velocities/forward--reverse flow velocity integrals). Before 20 weeks of gestation, a forward flow was recorded throughout the cardiac cycle and the diastolic deceleration phase was gradual and smooth. After 20 weeks, an incisura appeared at end-systole that progressively increased, and by 30 weeks of gestation a brief reverse diastolic flow was constantly recorded. The balance index increased slightly throughout gestation. Color flow mapping demonstrated that the reverse flow observed late in gestation in the isthmus was coming from the ductus arteriosus. In conclusion, the morphology of the Doppler flow velocity waveform of the fetal aortic isthmus changes with gestation. The proposed balance index may be useful in identifying fetuses with disturbed peripheral hemodynamics.

Analysis of Variance↗

PubMed1987

The use and misuse of the fetal biophysical profile.

The value of the fetal biophysical profile in determining fetal well-being has been well documented. The increasing clinical use of the fetal biophysical profile, however, has led to the recognition of frequent errors in the interpretation and application of this modality. These errors may result in unnecessary interventions or adverse perinatal outcome. The most frequent errors in the interpretation and application of the fetal biophysical profile are described; in an attempt to minimize the misuse of the fetal biophysical profile, an alternative protocol of antepartum fetal evaluation is suggested based upon the information obtained from the biophysical monitoring of the fetus.

Central Nervous System↗