Authors:Zs. Hajdu, L. Lorántfy, N. Jedlinszki, K. Boros, J. Hohmann, and D. Csupor
The radish-like hypocotyls of Maca (Lepidium meyenii Walp., Brassicaceae) are widely consumed as common vegetable in the Andean highlands. It is considered as healthy food, rich in carbohydrates and protein, a herbal medicine with a general invigorating reputation and fertility and sexual performance enhancer. The latter is the most popular contemporary application of the plant in Europe. The number and variety of industrial products on the market is increasing. Here we report the development of a simple and reliable analytical protocol for the qualitative and quantitative analysis of maca content of preparations and for the detection of synthetic phosphodiesterase inhibitors. Fourteen products were analysed by the method based on TLC and HPLC-DAD analysis developed by us. Our experiments revealed that beside good-quality products, the majority of the multicomponent preparations did not contain the declared herbal component or the quantity of the measured macamide was very low. Furthermore, one preparation is adulterated with a synthetic phosphodiesterase inhibitor. The presented method is suitable for quality control of L. meyenii products.
Authors:N. Regéczy, L. Kormos, Cs. M. Szigetvári, É. Torbágyi, M. Hajdu, L. Gopcsa, A. Bányai, and K. Pálóczi
Reaction patterns of the 7th Human Leukocyte Differentiation Antigen Workshop blind panel adhesion molecules were studied on CD3/CD4, CD3/CD8, CD3/TCRγδ double positive T cells from peripheral blood of patients with chronic graft versus host disease (n=8) and healthy controls (n=4). Reactivity of 14 adhesion antibodies was tested by threecolour immunophenotyping. The mean proportion of CD3+ T cells (69±19%), CD3/CD8++ (31±13%) and CD3/TCRγδ++ (4±2%) T sub-populations of patients were comparable with the healthy controls. However, the mean percentage of CD3/CD4++ T cell subset in patients (14±12%) proved to be significantly decreased in comparison with the normal control value (34±16%) presumably due to secondary immunodeficiency. The workshop antibodies proved to be reactive with three T cell subsets expressing the examined antigens. Based on the results of the adhesion molecule workshop new CD categories have been introduced: CD156b as a transmembrane protein, CD167a as an epithelial tyrosin kinase receptor, CD168 as a receptor for hyaluronan mediated motility (RHAMM) and CD171 as a co-stimulatory adhesion molecule. There were significant differences in the expression of the CD167a and CD156b antigens on the CD3/CD4++ subset between the samples of patients compared with the controls characterizing the CD4+ T lymphocyte subpopulation in chronic graft versus host disease.
Authors:Katalin Kristóf, L. Janik, Kinga Komka, Ágnes Harmath, Júlia Hajdú, A. Nobilis, F. Rozgonyi, K. Nagy, J. Rigó, and Dóra Szabó
The occurrence of Candida spp. was investigated during a three-year period in two neonatal intensive care units, Budapest, Hungary. The species distribution among the 41 analysed cases was the following: C. albicans (30/41, 73%), C. parapsilosis (10/41, 24%) and C. glabrata (1/41, 3%). All of the isolates were susceptible to the tested drugs. There was a significant difference in the birth weight, the gestational age <30 weeks and the occurrence of caesarean section between the C. albicans and the C. parapsilosis groups of the cases. Respiratory tract colonization was the same (76–77%) in the extremely low birth weight (ELBW) and the very low birth weight (VLBW) groups. Comparing the ELBW, VLBW, and >1500 g birth weight groups, significant difference was found in the parenteral nutrition, the gestation weeks <36 or <30, the polymicrobial infection and the transfusion. The ratio of C. albicans, C. parapsilosis and C. glabrata was 9:7:1 in ELBW group; 6:3:0 in VLBW group and 15:1:0 in >1500 g group. The mortality rate for C. parapsilosis was higher than for C. albicans.