Identification, isolation, and characterization of a species-specific 30-kDa antigen of Oesophagostomum dentatum

In the search for a serology tool for the diagnosis of nonpatent as well as patent infections with Oesophagostomum dentatum in pigs a water-soluble, unglycosilated antigen of about 30 kDa specific for the third-stage larvae of the parasite was purified by ion-exchange chromatography. In Western blots, the antigen was first detected by antibodies at day 7 postinfection. Cross-reactivity with O. quadrispinulatum, Ascaris suum, or Trichuris suis was not detected. It is suggested that this protein is a suitable tool for the species-specific serodiagnosis of O. dentatum infection in pigs. Received: 15 June 1998 / Accepted: 28 September 1998     

营养和激素对家蝇卵黄发生的影响

本实验通过对家蝇取食量的测定，对家蝇进行不同饲料饲喂后，对其不同发育期的血淋巴、脂肪体及和卵巢的发育及卵黄蛋白含量进行观察测定，结果表明，取食蛋白组家蝇血淋巴、脂肪体和卵巢卵黄蛋白含量均高于奶粉组和对照组；羽化４８ｈ后的血淋巴和脂肪体中卵黄蛋白含量为７．３μｇ／μｌ、３１．９μｇ／头；卵巢卵黄蛋白含量为５５．０μｇ／头；在羽化后７２ｈ血淋巴和脂肪体中卵黄蛋白含量分别为２．９μｇ／μｌ、３２．０μｇ／头；卵巢卵黄蛋白含量为８０．０μｇ／头；脉冲式饲喂家蝇后，体内卵黄蛋白含量明显高于对照组，说明蛋白质饲料在家蝇卵黄发生中起重要作用。激素处理结果证明，ＪＨＡ单独处理及ＪＨＡ和蜕皮素协同处理均能促进卵黄蛋白的合成和摄取，而蜕皮素单独处理没有促进作用。最后对营养和激素对生殖的调控作用进行了讨论。     

Multi-center, double-blind, placebo-controlled trial of fluocortin butyl in perennial rhinitis

Fluocortin butyl (FCB) is a newly synthesized corticosteroid with a high ratio of topical to systemic activity. FCB was studied in a multi-center, double-blind, placebo-controlled trial of therapy of perennial rhinitis. The study was conducted between January and May 1981. Patients evaluated suffered from either chronic allergic or chronic nonallergic rhinitis or both. A total of 306 patients from 16 investigative centers were evaluated by comparing FCB to placebo. Three separate dosage regimens were employed. Patients received a total daily dose of 2, 4, or 8 mg. FCB was found to be an effective therapeutic agent. It reduced symptoms of nasal congestion, rhinorrhea, postnasal drainage, and sneezing. It also markedly reduced the use of concomitant medications (chlorpheniramine maleate and/or pseudoephedrine). Relief of symptoms was noted as early as the first week of therapy, and the degree of improvement increased progressively during the study. There was little difference between the relief produced by the 4 mg and 8 mg regimens. Both of these were superior to the 2 mg regimen. The drug was well tolerated; no significant side effects were noted.     

An Evaluation of Finger Pulse Volume as a Psychophysiological Measure of Anxiety

The present experiment explored the utility of finger pulse volume (FPV) as a measure of anxiety. Subjects were exposed to either a threatening or nonthreatening situation, and indices of physiological arousal (pulse rate (PR) and FPV) and self-report of anxiety (Affect Adjective Checklist (AACL)) were collected. Results indicated that FPV was responsive to changes in experimentally induced anxiety and significantly correlated with PR and AACL, although the strength of these relationships was not substantial. Relevance for psychophysiological theory and the clinical observation of anxiety is discussed.     

Activating effect of <Emphasis Type="Italic">Tanacetum vulgare</Emphasis> L. pectin polysaccharide on ionic channels of neuronal membrane

The membranotropic effects of TVF tanacetan pectin polysaccharide derived from Tanacetum vulgare L. was studied by the voltage-clamp method on isolated neurons of Lymnaea stagnalis mollusk. TVF in concentrations of 0.1-10.0 µg/ml nonselectively activated the outward potassium and total inward (sodium and calcium) ionic currents (slightly dose-dependently and reversibly increased their amplitude by 5–10%) and decreased nonspecific leakage current.Translated from ByulletenLINE" BORDER="0"> EksperimentalLINE" BORDER="0">noi Biologii i Meditsiny, Vol. 138, No. 10, pp. 439–441, October, 2004     

Characterization of idiotopes on MOPC 315 IgA using monoclonal antiidiotypic antibodies

The isologous antiidiotypic response in BALB/c mice to immunization with the DNP-binding IgA myeloma protein, MOPC 315, alters the expression of the anti-DNP antibody repertoire and confers immunity against MOPC 315 myeloma tumors. In order to characterize the idiotopes on MOPC 315 IgA which elicit this response we have isolated four monoclonal antiidiotypic antibodies (AIA), D10 (IgG_2a), A2(IgG₁), G3 (IgG_2b) and F1 (IgG_2a), produced by splenocytes of BALB/c mice immunized with MOPC 315 IgA in three independent fusion experiments. These AIA react with MOPC 315 IgA. reassociated H³¹⁵ L³¹⁵ and F³¹⁵_V but not with free H³¹⁵, L³¹⁵, V³¹⁵_H or V³¹⁵₂. In addition the AIA do not react with the closely related DNP-binding IgA myeloma protein, MOPC 460, suggesting that they are directed against private idiotopes on MOPC 315 IgA. These idiotopes can be divided into two groups. Group I, defined by D10, A2 and G3 consists of two overlapping idiotopes, one of which is related to the hapten-binding site. The two idiotopes are formed by an interaction of amino acids in H³¹⁵ and L³¹⁵. Group II defined by F1 consists of one idiotope which is related to the hapten-binding site. This idiotope is comprised of an aminoacid sequence on H³¹⁵ which requires an interaction with either L³¹⁵ or L⁴⁶⁰ for expression. A2 and G3 react identically with the same idiotope but were derived from two independent fusion experiments. This indicates an identity of AIA clonotypes among individual mice and suggests that the isologous AIA response to MOPC 315 IgA is restricted.     

Genetic and light intensity effects on the activity and emigratory behavior of the house fly,Musca domestica (L.)

The emigratory behavior and locomotor activity of yellow-eyed (y/y), wildtype (+/+), and heterozygous (+/y) house flies was examined at 8 fc (86 lx) and 1600 fc (17,223 lx) light intenstities. At 8 fc, emigration rate and activity of the y/y flies was similar to that of the +/+ and +/y flies. However, at 1600 fc, the y/y flies emigrated at twice the rate and showed an activity of about one-third that of the other genotypes. The behavior of the +/+ and +/y flies remained similar regardless of the experimental design or light intensity. The excessive neural stimulation by high-intensity light resulting from reduced shielding pigments led to behavioral modifications in the visual and tactile responses of the y/y flies.This research was supported in part by grants from the CUNY Faculty Research Award Program (No. 1103) and NIH Biomedical Research Support Grant 5-S05-R-07064.     

The relative merits of cromolyn sodium and high-dose theophylline therapy in childhood asthma

The use of cromolyn sodium (SCG) and high-dose theophylline (HDT) in the treatment of chronic perennial asthma in children is reviewed. It is noted that the regimens are only suitable for children with persistent symptoms uncontrolled by simpler forms of treatment. The methods of administration and dosage based on pharmacologic data are considered, and the potential importance of long-acting theophylline and nebulized cromolyn preparations is noted. Short-term studies have confirmed the efficacy of both drugs, and a comparative study showed little difference between them. Long-term studies of SCG have demonstrated its value to some 66% of children without serious side effects. No formal long-term studies have been carried out on HDT. Side effects from theophylline can often be eliminated by careful control of blood levels. From published evidence, neither SCG nor HDT is effective in steroid-dependent asthmatic children, and they contribute little, if anything, to management in such cases. The difference in cost of the drugs is small when all factors are considered, and either regimen is justified by the saving in medical expenses when used for carefully selected patients.     

Absence of chromosome heterogeneity between classical Fanconi's anemia and the Estren-Dameshek type

Chromosome investigations were carried out in 7 patients with Fanconi's anemia, type Estren-Dameshek. The frequency and types of chromosome instability found in cultured lymphocytes were in accord with those detected in individuals with classical Fanconi's anemia. The break-point distribution indicates a significant excess of breaks in chromosomes No. 1, 2, and 7 and a deficit in No. 18 and X and Y chromosomes. There was a clear clustering of breaks at certain locations in chromosomes No. 1, 2, 3, 7, 9, and 14. The location of the breaks with respect to the bands demonstrated an almost exclusive involvement of the lighter bands, regardless of the banding method used. These results suggest that most breaks take place in the interbands between the G and R bands. In all patients, chromosome instability was less frequent in direct bone marrow preparations than in lymphocyte cultures. However, cultured bone marrow cells showed a significant increase of chromosome aberrations. On the whole, the chromosome data derived from this series of patients are in agreement with those obtained in individuals with classical Fanconi's anemia and give no support to the idea of cytogenetic heterogeneity between subjects affected by these two forms of childhood aplastic anemia.