Miracle-dz/UniFAR-FTUs huggingface dataset:
Role of absolute lung volume to assess alveolar recruitment in acute respiratory distress syndrome patients

Objective:It is commonly assumed that lung volume at zero end-expiratory pressure (functional residual capacity) is not affected by positive end-expiratory pressure (PEEP) even in presence of alveolar recruitment, and it is often ignored when measuring lung recruitment by pressure-volume curves. Aim of the study was to investigate the effect of PEEP on functional residual capacity, and quantify the error of considering equal functional residual capacity in measuring alveolar recruitment. Design:Interventional human study. Setting:A 10-bed general intensive care unit in a university hospital. Patients:Ten sedated, curarized, mechanically ventilated acute respiratory distress syndrome patients. Interventions:Three levels of PEEP (5, 10, and 15 cm H2O), were randomly applied, for 1 hr each. Measurements and Main Results:At each PEEP we obtained a pressure-volume curve, the volume expired from PEEP to zero pressure (PEEP related lung volume) and functional residual capacity by helium dilution method. Functional residual capacity increased at increasing PEEP levels. Functional residual capacity was 507 ± 292, 607 ± 311, and 681 ± 312 ml (p < .05), respectively, at PEEP 5, 10, and 15 cm H2O. Pressure-volume curves were aligned starting from PEEP related lung volume (relative volume method) or from end-expiratory lung volume at PEEP (absolute volume method). Recruitment was measured as vertical distance of pressure-volume curves at 20 cm H2O airway pressure. The relative volume method led to underestimation of recruitment (43 ± 28% and 35 ± 18 %, respectively, at PEEP 10 and 15). Conclusions:Functional residual capacity is affected by PEEP. Ignoring this effect leads to relevant underestimation of alveolar recruitment as measure by pressure-volume curve displacement.
Molecular function of WhiB4/Rv3681c of Mycobacterium tuberculosis H37Rv: a [4Fe−4S] cluster co‐ordinating protein disulphide reductase

The genome sequence of Mycobacterium tuberculosis H37Rv revealed the presence of seven whiB‐like open reading frames. In spite of several genetic studies on whiB genes, the biochemical properties of WhiB proteins are poorly understood. All WhiB‐like proteins have four conserved cysteine residues, out of which two are present in a CXXC motif. We report for the first time the detailed biochemical and biophysical properties of M. tuberculosis WhiB4/Rv3681c and demonstrate the functional relevance of four conserved cysteines and the CXXC motif. UV‐visible absorption spectra of freshly purified mWhiB4 showed the presence of a [2Fe−2S] cluster, whereas the electron paramagnetic resonance (EPR) spectra of reconstituted protein showed the presence of a [4Fe−4S] cluster. The iron–sulphur cluster was redox sensitive but stably co‐ordinated to the protein even in the presence of high concentration of chaotropic agents. Despite primary sequence divergence from thioredoxin family proteins, the apo mWhiB4 has properties similar to thioredoxins and functions as a protein disulphide reductase, whereas holo mWhiB4 is enzymatically inactive. Apart from the cysteine thiol of CXXC motif the distantly placed thiol pair also contributes equally to the enzymatic activity of mWhiB4. A functional model of mWhiB4 in redox signaling during oxidative stress in M. tuberculosis has been presented.
Neonatal jaundice: an analysis of 551 cases.

Jaundice is a common neonatal problem. Since bilirubin is potentially toxic to the central nervous system, early detection and appropriate management of neonatal jaundice (NNJ) is of paramount importance, especially when bilirubin even in physiological ranges may cause permanent neuronal injury. We, therefore, undertook the present study to assess the incidence, severity, causes and therapeutic interventions for jaundice in our inborn babies.
U.S. dental school applicants and enrollees: a ten year perspective.

Applications to dental schools increased throughout the 1990s until 1997. In 1998 this pattern reversed, and the number of dental school applicants has dropped each year since that time and continues to decline through the application cycle for the 2001-2002 first-year class. Possible reasons for the decline in applications include an abundance of financially rewarding career opportunities fueled by the robust U.S. economy, a reluctance by college students to assume more educational debt, an unfavorable view of healthcare careers in the light of managed care and declining federal reimbursement, and assumptions about the difficulty of gaining admittance to dental school given the high academic achievement of those who have been admitted in recent years. A national decline in the applicant pool does not necessarily translate into a decline for any given dental school. The quality of applicants, judged by grade point averages and Dental Admissions Test scores, is high. Nevertheless, the recent drop in dental school applicants is a cause for concern. Because recruitment must be approached as a process that takes years to yield results, stakeholders in dental education need to sustain vigorous recruiting efforts even in the best of times.
Leptin levels and insulin sensitivity in obese and non-obese patients with polycystic ovary syndrome.

The study was conducted to assess leptin levels and insulin sensitivity in obese and non-obese patients with polycystic ovary syndrome (PCOS). Twenty-two women with PCOS and 19 control healthy women were included in the study, divided into obese and non-obese groups. Leptin was determined using Linco Research radio-immunoassay while insulin sensitivity was calculated from intravenous glucose tolerance tests with frequent blood sampling using MINMOD analysis. Significantly higher basal leptin levels were found in obese compared to non-obese PCOS (31.76 +/- 3.06 vs. 10.42 +/- 2.31 ng/ml; p < 0.05) as well as in obese in comparison to non-obese controls (29.16 +/- 5.06 vs 8.51 +/- 0.88 ng/ml; p < 0.05). A negative correlation was found between insulin sensitivity and leptin levels in both obese (r = -0.2480; p > 0.05) and non-obese PCOS groups (r = -0.4620; p > 0.05). In conclusion, high serum leptin, insulin and testosterone levels together with reduced insulin sensitivity were found in obese PCOS women, suggesting that high leptin levels could be a characteristic of the obese PCOS phenotype.
INTERACTION OF PHYSICAL ACTIVITY , MENTAL HEALTH AND QUALITY OF LIFE : A STUDY ON UNIVERSITY STUDENTS IN PAKISTAN

In Pakistani society an elevated level of physical inactivity and psychological distress has been identified lately. Nevertheless, most of the studies examining the association between physical activity and psychological health are limited in reference to the population in Pakistan especially in consideration to University students. University students are considered to be at a risk stage due to academic stress and physiological changes. Therefore, the purpose of this study was to explore the associations between physical activity, quality of life and psychological health related among university students in Pakistan. Data was collected from 378 participants from seven universities in Pakistan (265 females, 112 males). The age ranges from 18-48 years, (M=22.7, SD=3.97), mostly within the age range of 19-24. General Health Questionnaire-12, SF36 quality of life and International physical activity questionnaire were administered with the help of class teachers, in their classroom. Data was analyzed by using bivariate correlation on SPSS. Results indicated a linear positive relationship of physical activity with mental health component summary r=0.12, p<0.05 and a negative association with psychological distress r=-0.12, p<0.05. Conversely, psychological distress was negatively related to overall health related quality of life r =-0.32, p<0.01 and its subscales; mental component summary r=-0.31, p<0.01 and physical component summary r=-0.27, p<0.01. However, the variability of results was revealed in consideration to the intensity of PA. Only vigorous PA and walking significantly correlated with psychological distress, mental health component summary and overall quality of life. A further research is suggested where the interaction of mental health and PA intensity is assessed through experimental study.
Neural sensitivity to social deviance predicts attentive processing of peer-group judgment

The detection of one’s deviance from social norms is an essential mechanism of individual adjustment to group behavior and, thus, for the perpetuation of norms within groups. It has been suggested that error signals in mediofrontal cortex provide the neural basis of such deviance detection, which contributes to later adjustment to the norm. In the present study, we used event-related potentials (ERPs) to demonstrate that, across participants, the strength of mediofrontal brain correlates of the detection of deviance from a peer group’s norms was negatively related to attentive processing of the same group’s judgments in a later task. We propose that an individual’s perception of social deviance might bias basic cognitive processing during further interaction with the group. Strongly perceiving disagreement with a group could cause an individual to avoid or inhibit this group’s judgments.
Dissociating effects of stimulus identity and load on working memory attentional guidance: Lengthening encoding time eliminates the effect of load but not identity

Effects of the identity and load of items in working memory (WM) on visual attention were examined. With a short interval between the WM item and a subsequent search task, there were effects of both load (slowed overall reaction times, RTs, in a WM condition relative to a mere repetition baseline) and identity (search RTs were affected by re-presentation of the item in WM in the search display). As the time to encode the initial display increased, the effects of load decreased while the effect of identity remained. The data indicate that the identity of stimuli in WM can affect the subsequent deployment of attention even when time is allowed for consolidation of the stimuli in WM, and that the WM effects are not causally related to the presence of cognitive load. The results are consistent with the identity of stimuli in WM modulating attention post the memory consolidation stage.
HIV type 1 subtypes in Malaysia include B, C, and E.

Peripheral blood mononuclear cell specimens were collected from 13 HIV-1-infected IV drug users in Kuala Lumpur, Malaysia, as well as one HIV-infected baby, between 1992 and 1993. DNA was then amplified by nested polymerase chain reaction and a 345-bp fragment of the C2V3 region of the env gene was sequenced. 11 of the 14 Malaysian sequences clustered with the B' subtype, one different from the typical subtype B US strains HIVMN and HIVSF2. Two sequences grouped in the C subtype and had sister taxa closer to the Indian C subtype sequences than those from Zambia. The sequence from the infant was identified as a subtype E virus, grouped more closely with subtype E strains from Thailand than subtype E viruses from the Central African Republic.
Excess glutamate levels in the cerebrospinal fluid predict clinical outcome of bacterial meningitis.

BACKGROUND The clinical course of bacterial meningitis still is characterized by a high mortality and frequent neurological deficits in survivors. In addition to other potentially neurotoxic mediators of inflammation, the excitatory amino acid glutamate, which has been implicated in neuronal death in a variety of other neurological diseases, may also be involved in the pathological process of bacterial meningitis. OBJECTIVES To investigate the prognostic value of the glutamate concentration in the cerebrospinal fluid (CSF) of patients with bacterial meningitis. PATIENTS AND METHODS Thirty consecutive patients with bacterial meningitis were included in a prospective study. The clinical severity of the disease was assessed on admission and 14 days after the beginning of antibiotic treatment by means of the Glasgow Coma Scale. Studies of CSF were performed on admission and after 3 to 6 days. In addition to standard CSF investigations, including cell count, cytologic findings, protein analysis, glucose and lactate levels, and microbiological tests, the concentration of glutamate in the CSF was measured by an enzymatic assay. RESULTS At admission, both CSF cell count and concentration of glutamate correlated well with the severity of the disease. After treatment, glutamate concentrations decreased significantly to normal or only slightly elevated levels in 23 patients. However, in 7 patients glutamate levels remained markedly increased. In this group, clinical outcome was significantly worse than in the group of patients with low glutamate levels in the second CSF analysis. CONCLUSIONS A prolonged increase of glutamate levels in the CSF may predict poor clinical outcome in patients with bacterial meningitis, possibly because of the sustained neurotoxic effects of this excitatory neurotransmitter.
[The effects of non-surgical periodontal treatment on the formation of root-dentin hypersensitivity].

PURPOSE To study the effects of non-surgical periodontal treatment on the occurrence of root-dentin hypersensitivity and explore its mechanisms through clinical observations. METHODS 1453 teeth of 52 patients with chronic periodontitis were given scaling and root-planing procedures. 3 months follow-up of these teeth were taken to find root-dentin hypersensitivity after treatment. RESULTS 432 teeth of 39 patients had different degree of root-dentin hypersensitivity. However,the symptoms disappeared in most patients after active desensitization treatment. CONCLUSION Subgingival scaling and root-planing can induce the occurrence of root dentin hypersensitivity,therefore, desensitization treatment should be considered as a part of periodontal treatment plan.
Estrogen Receptor β Expression and Apoptosis of Spermatocytes of Mice Overexpressing a Rat Androgen-Binding Protein Transgene1

Abstract Progression of the first meiotic division in male germ cells is regulated by a variety of factors, including androgens and possibly estrogens. When this regulation fails, meiosis is arrested and primary spermatocytes degenerate by apoptosis. Earlier studies showed that overexpression of rat androgen-binding protein (ABP) in the testis of transgenic mice results in a partial meiotic arrest and apoptosis of pachytene spermatocytes. In view of the recent localization of estrogen receptor β (ERβ) in primary spermatocytes and data suggesting the ability of ERβ to repress cellular proliferation, we tested the hypothesis that variations in the testicular steroid microenvironment caused by excess ABP produce changes in ERβ expression in this cellular type that could be associated to the meiotic arrest and, eventually, to the induction of germ cell apoptosis observed in the ABP transgenic mice. Increased levels of ERβ mRNA and protein were demonstrated in the testis of rat ABP transgenic mice compared with nontransgenic littermates by reverse transcriptase-polymerase chain reaction (RT-PCR) experiments, Northern blotting, and Western Blotting. The major differences were found when isolated germ cells of transgenic and nontransgenic littermates were analyzed by RT-PCR. In keeping with this finding, ERβ was strongly immunolabeled in pachytene spermatocytes of rat ABP transgenic mice and localized in tubular stages in which TUNEL labeling was maximal. Confocal microscopy analysis of a fluorescent TUNEL assay and ERβ immunohistochemistry revealed that degenerating pachytene spermatocytes overexpressed ERβ. The present results are consistent with the interpretation that ERβ is associated with the events that regulate negatively the progression of meiosis or that lead to spermatocyte apoptosis.
Small cell carcinoma of the prostate. II. Immunohistochemical and electron microscopic studies of 18 cases

To evaluate the histogenesis of small cell carcinoma of the prostate, 18 cases of this tumor (9 pure small cell and 9 combined adeno‐and small cell carcinoma) were studied using immunohistochemical methods. Seven of the small cell components also were assessed by electron microscopic examination. Using neuronspecific enolase (NSE), prostatic acid phosphatase (PAP), and prostate‐specific antigen (PSA) on tissue sections, three distinctive immunostaining patterns of small cell carcinoma components were identified: staining positive for NSE and negative for PSA and PAP (10 cases), staining positive for PSA and PAP and negative for NSE (3 cases), and negative reaction for all three antigens (5 cases). Electron microscopic study demonstrated neurosecretory granules in two cases. Based on the immunostaining and electron microscopic findings, small cell carcinomas of the prostate appear to be a heterogeneous group of tumors. Some of them are neuroendocrine carcinomas whereas others are poorly differentiated adenocarcinomas or, possibly, reserve cell carcinomas. Differences in immunostaining patterns or presence and absence of adenocarcinoma component do not reflect any differences in the uniformly poor prognosis of small cell carcinomas, in which median survival is 7.7 months. The authors believe that, because of such heterogeneity, small cell carcinomas of the prostate arise from multipotential prostatic epithelium and that an origin from specific neuroendocrine cells need not be implicated. Cancer 59:977‐982, 1987.
Application of k‐space energy spectrum analysis for inherent and dynamic B0 mapping and deblurring in spiral imaging

Spiral imaging is vulnerable to spatial and temporal variations of the amplitude of the static magnetic field (B0) caused by susceptibility effects, eddy currents, chemical shifts, subject motion, physiological noise, and system instabilities, resulting in image blurring. Here, a novel off‐resonance correction method is proposed to address these issues. A k‐space energy spectrum analysis algorithm is first applied to inherently and dynamically generate a B0 map from the k‐space data at each time point, without requiring any additional data acquisition, pulse sequence modification, or phase unwrapping. A simulated phase evolution rewinding algorithm and an automatic residual deblurring algorithm are then used to correct for the blurring caused by both spatial and temporal B0 variations, resulting in a high spatial and temporal fidelity. This method is validated against conventional B0 mapping and deblurring methods, and its advantages for dynamic MRI applications are demonstrated in functional MRI studies. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.
Basal concentrations and acute responses of serum hormones and strength development during heavy resistance training in middle-aged and elderly men and women.

Effects of 6 months of heavy resistance training combined with explosive exercises on both basal concentrations and acute responses of total and free testosterone, growth hormone (GH), dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEAS), cortisol and sex hormone-binding globulin (SHBG), as well as voluntary neural activation and maximal strength of knee extensors were examined in 10 middle-aged men (M40; 42 +/- 2 years), 11 middle-aged women (W40; 39 +/- 3 years), 11 elderly men (M70; 72 +/- 3 years), and in 10 elderly women (W70; 67 +/- 3 years). The maximal integrated electromyographic (iEMG) and 1 repetition maximum (RM) knee-extension values remained unaltered in all groups during a 1-month control period with no strength training. During the 6-month training the 1RM values increased in M40 by 27 +/- 9% (p < .001), in M70 by 16 +/- 6% (p < .001), in W40 by 28 +/- 11% (p < .001), and in W70 by 24 +/- 10% (p < .001). The iEMGs of the vastus lateralis and medialis muscles increased(p < .05-.001) in M40, M70, W40, and W70. No systematic changes occurred during the experimental period in the mean concentrations of serum total and free testosterone, DHEA, DHEAS, GH, cortisol, or SHBG. However, the mean levels of individual serum free testosterone in W70 and serum testosterone in the total group of women correlated with the individual changes recorded in strength during the training (r = .55,p <.05; and r = .43,p <.05). The single exercise session both before and after the training resulted in significant responses in serum total and free testosterone concentrations in both male groups (p <.05-.01), but not in the female groups, as well as in serum GH levels in all groups (p <.05-.01) except W70 (ns). In summary, the present strength training led to great increases in maximal strength not only in middle-aged but also in elderly men and women. The strength gains were accompanied by large increases in the maximal voluntary activation of the trained muscles. None of the groups showed systematic changes in the mean serum concentrations of hormones examined. However, a low level of testosterone, especially in older women, may be a limiting factor in strength development and testosterone could mediate interactions with the nervous system contributing to strength development. The physiological significance of the lack of acute responsiveness of serum GH to heavy resistance exercise in older women for their trainability during prolonged strength training requires further examination.
Alterations of Penicillin-Binding Proteins 1A, 2X, and 2B in Streptococcus pneumoniae Isolates for Which Amoxicillin MICs Are Higher than Penicillin MICs

ABSTRACT Penicillin-binding proteins (PBPs) of 15 selected penicillin- and amoxicillin-resistant Streptococcus pneumoniae isolates (MICs of 2 to 8 and 8 to 16 μg/ml, respectively) were studied. In addition to typical changes in PBPs 1A and 2X, these strains had 10 unique changes in PBP 2B, including a 618A-G substitution, which may be the key alteration associated with amoxicillin resistance.
Intramural neovascularization and haemorrhages are major long‐term effects of intravascular γ‐radiation after stenting

Structural changes that might influence the structural integrity of the vessel in response to intravascular brachytherapy (IVB) and stenting were examined, focus being on the importance of neovascularization in rabbit stented arteries. Stents were implanted in the infrarenal aortas of rabbits, immediately followed by gamma IVB or a sham radiation procedure, and the arteries harvested at 6 months. Labelling for von Willebrand factor showed an increase in adventitial and medial neovascularization in irradiated versus control arteries group (5.04±0.89 versus 1.51±0.23 mm−2, respectively; p=0.004). Moreover, intramedial haemorrhages (free hemosiderin deposition) and inflammation (macrophages) were only observed in irradiated arteries. No significant change in expression of matrix metalloproteinase 1, 2 or 3 was observed between the irradiated and control group while collagen content decreased in the irradiated versus the control group (10.05%±1.48% versus 31.92%±3.12%, respectively; p<0.001). The study supports the hypothesis that IVB associated with stenting induces late deleterious effects on the medial layer, characterized by formation of intramural neovessels, haemorrhages and a decrease in collagen content.