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PubMed1975

Climatologic aspects of obesity and therapeutic semistarvation.

Multifactor stress was studied, using obese men subjected to long-term (49 d) semistarvation in either a temperate or a not climate. The study was wide in scope, fiving information on endocrine-metabolic effects of a) uncomplicated obesity, b) ovesity in combination with climatic heat, c) obesity plus semistarvation, and d) ovesity combined with semistarvation plus climatic heat. The test subjects--groups of 12 to 13 obese men--remained on a diet which provided 335-400 kcal/d and contained at least 45 g protein, 14 g carbohydrate, and 11 g fat. Overnight urine specimens collected at 7-d intervals were analyzed for epinephrine, norepinephrine, 17-OHCS, ketones, urea, uric acid, creatinine, inorganic phosphate, sodium, and potassium. There was transitory hyperketonuria which related inversely to environmental thermal levels. Most of the physiologic response patterns in the triple-stressor circumstance (obesity plus climatic heat plus semistarvation) were unlike those in the double-stressor situation (obesity plus semistarvation). Thus, there was evidence of compounding of stressor effects. Evidence of diminished sensitivity to heat appeared when obesity was lessened.

Body Composition↗
PubMed2001

Vascular endothelial growth factor and basic fibroblast growth factor urine levels as predictors of outcome in hormone-refractory prostate cancer patients: a cancer and leukemia group B study.

Better prognostic markers are needed for hormone-refractory prostate cancer (HRPC) patients. No single biochemical or clinical parameter can reliably predict patient response to therapy or rapidity of disease progression. Peptide factors involved in major cancer growth pathways, such as tumor angiogenesis, are attractive candidates as markers of low- and high-risk HRPC patients. We analyzed prospectively collected urine specimens from 100 of 390 HRPC patients undergoing therapy with the growth factor antagonist suramin as part of CALGB 9480. Levels of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) were assessed from day 1 of therapy (D1) and day 29 (D29) urine samples from this subset of 100 randomly selected patients. Growth factor levels were determined by standardized ELISA microtiter plate assays from a commercial (bFGF) or proprietary (VEGF) source. Pretreatment urine VEGF levels were predictive of survival. In univariate analysis, patients whose baseline urine VEGF level was < or =28 pg/ml (the median level) had an average survival of 17 months; those with baseline VEGF >28 pg/ml had a significantly shorter survival of 10 months (P = 0.024). This difference corresponded to a 60% increased risk of dying for the higher urine VEGF patients (hazard ratio, 1.62; P = 0.03) and remained significant in multivariate analysis (hazard ratio, 1.72, P = 0.02). No significant correlations between urine bFGF level or change in bFGF levels and survival were found. These results support the notion that certain peptide growth factor-mediated, mitogenic pathways are important in HRPC and that their levels can predict outcome.

Aged↗
PubMed1975

A novel, convenient, multiple test system for detection of bacteriuria.

A novel, convenient, multiple test system for the detection of bacteriuria is described and evaluated. The system consists of a small plastic strip with three dry reagent areas. One rapidly detects the presence of nitrite in urine and the remaining two quantitate total and gram-negative bacterial urine population after 18 to 24 hours of incubation. Quantitative accuracy was evaluated in two blind studies. In the first, known concentrations of 18 different organisms were compared and in the second, unknown concentrations of 218 randomly collected urine specimens were quantitated by both the calibrated loop streak method the new system. Overall correlation was 96 per cent for growth reagent areas. The nitrite area detected 84 per cent of the urines positive for bacteriuria. The advantages of the system over conventional bacteriuria detection systems are described.

Bacteriuria↗
PubMed1978

Laboratory medicine. Series on clinical testing. 2. Fractionation of urinary ketosteroids. Procedure and clinical significance.

Ketosteroids, the excretory metabolities of adrenal and gonadal steroids, can be analyzed individually in urine by a simple extraction procedure followed by separation and quantitation by the use of gas/liquid chromatography. The ketosteroids quantitatively detected by the technique are androsterone, etiocholanolone, dehydroepiandrosterone, 11-hydroxyandrosterone, 11-hydroxyetiocholanolone, 11-ketandrosterone, and 11-ketoetiocholanolone. Other steroid metabolities detected are pregnanediol, pregnanetriol, delta5-pregnenetriol, and 11-ketopregnanetriol. In comparison with concentrations of these steroids observed in urine specimens collected from healthy individuals, abnormal results occur in specimens from patients with testicular disease, Cushing's syndrome, adrenal hyperplasia, and several types of female hirsutism. Characteristic profiles for each of these diseases are presented.

11-Hydroxycorticosteroids↗
PubMed1992

Drugs in sport--results of the past 6 years of dope testing in South Africa.

Screening procedures were performed on 2,066 urine specimens collected from competitors in 17 different sports during the period 1986-1991. Samples were tested by gas chromatography and gas chromatography/mass spectrometry for the presence of stimulants, narcotics and anabolic steroids. Drugs classified as forbidden substances by the International Olympic Committee were detected in 113 (5.5%) of the samples. Nineteen-nortestosterone and fencamfamine were the anabolic steroid and stimulant most frequently detected. The ephedrines as a group accounted for 35 (31.0%) of the positive samples. This high incidence of the use of banned substances indicates that the dope testing programme to curb use of banned substances by competitors in sport should continue and be expanded to other sports.

Anabolic Agents↗
PubMed2002

Relationship between demographic characteristics and community-acquired urinary tract infection.

To investigate the effect of age, sex and marital status on the etiology of community-acquired urinary tract infection and the antimicrobial resistance of uropathogens, urine specimens collected from 270 outpatients were analysed and 121 significant monomicrobial cultures obtained. The microorganisms were identified and their susceptibility to 14 selected antimicrobial agents was determined. These results were then related to the age, sex and marital status of the patients. This study concludes that understanding the effect of the different factors on community-acquired urinary tract infections and their antimicrobial resistance will aid the proper management of this disease.

Adolescent↗
PubMed1991

Aromatic and heterocyclic amine metabolism and phenotyping in humans.

Our method to evaluate acetylator phenotype and N-oxidation phenotype with a single caffeine dose and a single urine specimen collection has enabled us to examine acetylation and N-oxidation by two enzyme systems that have a known genetic polymorphism and are important in aromatic amine metabolism. Based on available data, we have hypothesized patients with urinary bladder cancer will have a higher frequency of rapid N-oxidation and slow acetylation phenotypes when compared to controls. On the other hand, patients with colorectal cancer should contain a higher proportion of both rapid N-oxidation phenotype and rapid acetylation phenotype when compared to the control group. In contrast, lung cancer patients, should contain an increased frequency of rapid arylamine N-oxidation phenotypes with the frequency of acetyltransferase phenotype being greater or perhaps the same as in the control group.

Acetyltransferases↗
PubMed1985

[Congenital cytomegalovirus infections in a neonatal pathology unit].

In order to evaluate the incidence of congenital CMV infections we checked 200 babies in the special care baby unit of an obstetric clinic in Milan. In the same period 3779 babies were born in that clinic. Congenital CMV infection was diagnosed by virus isolation from urine specimens collected in the first week of life in two babies. One of them was asymptomatic, the other had the classical CID. Virological confirmation of a further CID observed in an infant hospitalized at that time in the unit was obtained. Different serological methods of congenital infections diagnosis, specific IgM, total IgM and IgA, rheumatoid factor determinations, were employed. Only the CMV-IgM ELA method didn't give false positive reactions and picked up 2 congenitally infected babies out of 3. From our data, we infer that the incidence of congenital CMV infection in the general milanese population might lie between 0.5-1% of live births. The level of seropositivity for CMV antibodies in the same population, as judged from the complement fixing antibodies determinations in the group of the mothers, was 87%.

Cytomegalovirus Infections↗
PubMed1988

Detection with a monoclonal antibody of an antigen, characteristic of the genus Schistosoma, excreted in the urine.

In the host, the antigen excreted by schistosomes in the circulating blood is concentrated in the urine. A mouse monoclonal antibody of the IgM class type lambda, directed against an epitope of the intestinal epithelium of the adult worm, is obtained. The antigen found in the urine of the host as well as the monoclonal antibody has been previously characterized. It is of a polysaccharidic nature, is thermostable and specific for the genus Schistosoma. The antigen is found at all stages of the life cycle and, particularly, in the egg where it is found in large amounts. Detection of the antigen is by means of inhibition of the passive haemagglutination test. There is a fundamental advantage in detecting the metabolic antigen excreted by schistosomes instead of looking for circulating antibodies. The antigen is directly released by the parasite itself, antibodies being, by contrast, produced by the host, indirectly therefore, and in a way that varies from one individual to the next. Collecting urine specimens is, for field workers, easier than obtaining blood from the inhabitants. The detection of the antigen in the urine is made a rather simple procedure since the antigen is concentrated by the kidney and free in urine, instead of remaining conjugated with antibodies like it is in the blood. When used in the Cameroon for the study of prevalence in two foci of schistosomiasis, intestinal (Nalassi Emana) and urinary (Barombi Kotto), the test detecting the antigen in urine gives good correlations with the parasitological examinations looking for eggs of S. mansoni and S. haematobium in feces and urine.

Adolescent↗
PubMed1988

Clinical evaluation and use of urine screening for drug abuse.

Urine drug screening is indicated to evaluate patients who show mental status or behavioral changes and to monitor the abstinence of drug abusers. The appropriate timing for collecting urine specimens may vary depending on the suspected drug of abuse and on laboratory factors. Laboratories use a variety of techniques to do urine screens, and these must be understood by clinicians ordering the screens to interpret results correctly. In treating drug-abusing patients, clinicians must apply structured reinforcement in conjunction with urine screen results to aid patients in achieving abstinence.

Humans↗
PubMed1988

Gas chromatographic/mass spectrometric analysis of morphine and codeine in human urine of poppy seed eaters.

In this study, poppy seeds were examined for a natural constituent that might serve as a maker for the seeds' ingestion as opposed to opiate abuse. Thebaine was selected as possible marker, since it was found to be a component of all poppy seeds examined and was not a natural component of different heroin samples. During the course of this investigation, a new extraction and cleanup procedure was developed for the gas chromatographic/nitrogen phosphorus detection (GC/NPD) and gas chromatographic/mass spectrometric (GC/MS) analysis of morphine and codeine in urine. A linear response, over a concentration range of 25 to 600 ng/mL, was obtained for codeine and morphine (r = 0.9982 and 0.9947, respectively). The minimum detectable level (LOD) and limit of quantitation (LOQ) for morphine were 10 and 30 ng/mL, respectively; whereas LOD and LOQ for codeine were 2 and 8 ng/mL, respectively. The coefficients of variance (CV, n = 6) for morphine and codeine analyses at the 100-ng/mL level were 13.3 and 4.6%, respectively. This procedure was used for the analysis of urine samples from five poppy seed eaters who each ingested 200 g of poppy seed cake. Results indicated that significant amounts of morphine and codeine are excreted in urine and that in all subjects, at least at one point in time, the apparent morphine concentration as determined by radioimmunoassay (RIA) analysis exceeded the cutoff value (300 ng/mL) established for screening. Thebaine was not detected in urine specimens collected following poppy seeds ingestion and thus could not be used as a marker.

Chromatography, Gas↗
PubMed1986

The Coomassie Brilliant Blue method underestimates drug-induced tubular proteinuria.

The sensitivity of the Coomassie Brilliant Blue (CBB) procedure differs for different proteins. To investigate the impact of this variability on clinical measurements of proteinuria, we collected urine specimens from patients with glomerular disease or drug-induced tubular nephrotoxicity and compared urinary protein concentrations as determined by the CBB method with those obtained by the biuret method. The CBB method underestimated the protein concentration predicted by the biuret method by as much as eightfold in specimens with low proportions of albumin. Determinations of protein by the CBB method in serially diluted urine specimens from patients with tubular damage also deviated from linearity by as much as twofold for protein concentrations less than 1 g/L. We conclude that CBB binding is relatively insensitive for measuring proteins specifically associated with tubular damage and hence may be inappropriate for clinical use.

Biuret Reaction↗
PubMed1985

Urinalysis: the physician's responsibility.

Careful examination of a fresh, properly collected urine specimen can indicate the presence of urinary tract disease or uncover unsuspected local or systemic pathology. Urinalysis also can lead to a more complete understanding of a systemic disorder or can assure both the patient and the physician that urinary tract disease is absent, at least within the limitations of the examination. Performing a urinalysis takes no more than 10 minutes, is relatively inexpensive and requires minimal training in proper techniques.

Bacteriuria↗
PubMedDate not supplied

A comparative study of the Papanicolaou staining method and the fat stain technique in malignant and non-malignant lesions of the urinary tract.

We have collected urine specimens from cases of malignant and nonmalignant lesions of the urinary system and have proceeded to a comparative study of these cases with their clinicopathologic findings after staining them with the Papanicolaou method and the fat stain method. It was found that the fat stain is not specific for renal cell carcinoma only. However, a combination of fat stain and Papanicolaou stain as a second check up of potential malignancy would be the best way of examination.

Adenocarcinoma↗
PubMed1969

Detection of para-aminosalicylic acid (PAS) in urine: a simple spot test.

A simple spot test for the detection of PAS in urine has been described and its sensitivity compared with that of other methods such as the Ehrlich's reagent and the ferric chloride tests. In patients receiving 4 g. PAS the three methods gave similar results in urine specimens collected within eight hours. The new test is an inexpensive micro method which can easily be performed on a large scale. There is no reaction with sulfonamide or salicylic acid derivatives.

Aldehydes↗
PubMed1977

A semi-automated fluorometric method for total estrogens in pregnancy urine.

We report a continuous-flow fluorometric method for total urinary estrogens that involves the Kober reaction, with extraction of the reaction product into dichloroethane containing trichloroacetic acid as described by Hahnel and Jones [Clin. Chim. Acta 16, 185 (1967)]. The dichloroethane extraction gives greater stability to the Kober color and sharper separation of aqueous and organic phases. The analytical system is adjusted to give maximum response to estriol 16alpha,beta-D-glucuronide, the principal estrogen conjugate in urine from late pregnancy, when calibrated with estriol standards. An initial 20-fold dilution of the sample with water increased analytical recovery of estriol conjugates from urine while maintaining adequate fluorescent response. Glucose interference was reduced by dilution and eliminated by treatment with sodium borohydride. Urinary protein up to 20 g/liter did not interfere. Total estriol, as determined by gas-liquid chromatography, comprises about 70% of total urinary estrogens in late pregnancy as measured by our continuous-flow fluorometric method. A reference range is presented based on 209 randomly collected urine specimens in which total urinary estrogens are expressed as a ratio to creatinine.

Chromatography, Gas↗
PubMed1983

In vitro susceptibilities of canine urinary bacteria to selected antimicrobial agents.

Antimicrobial susceptibility tests were conducted on bacteria that were isolated from urine specimens collected by antepubic cystocentesis from dogs with urinary tract infections. Antimicrobics to which greater than or equal to 90% of these urinary bacteria were susceptible in vitro included trimethoprim-sulfamethoxazole (TMP-SMZ), nitrofurantoin, cephalexin, nalidixic acid, and gentamicin for isolates of Escherichia coli; ampicillin, TMP-SMZ, cephalexin, nalidixic acid, and gentamicin for isolates of Proteus mirabilis; ampicillin chloramphenicol, TMP-SMZ, nitrofurantoin, cephalexin, kanamycin, and gentamicin for isolates of coagulase-positive staphylococci; cephalexin, nalidixic acid, and gentamicin for isolates of Klebsiella pneumoniae; ampicillin, TMP-SMZ, and gentamicin for isolates of Streptococcus faecalis, Str faecium, and Str zymogenes; ampicillin, chloramphenicol, TMP-SMZ, and gentamicin for isolates of Str viridans; and ampicillin, chloramphenicol, TMP-SMZ, nitrofurantoin, cephalexin, kanamycin, and gentamicin for isolates of Str canis. No antimicrobial agent tested was effective in vitro at the 90% level for isolates of Pseudomonas aeruginosa, but gentamicin was closest, at 89%.

Animals↗