Targeting autophagic pathways might play a critical role in designing novel chemotherapeutic approaches in the treatment of human cancers, and the prevention of tumor-derived chemoresistance. Marine compounds were found to decrease tumor cell growth in vitro and in vivo. Some of them were shown to induce autophagic flux in tumor cells. In this study, we observed that the selected marine life-de...

Five specimens of Rhamdia quelen collected from the Lindóia Stream, PR, Brazil, were cytogenetically analyzed. The diploid chromosome number found was 58, including 30 metacentric, 16 submetacentric, 10 subtelocentric, and 2 acrocentric chromosomes. Supernumerary or B chromosomes, frequently observed in this fish group, were not detected. One of the individuals was triploid, with 3n = 87. A sil...

In situ hybridization of 18S-5.8S-25S rDNA probes labeled with biotin or rhodamine and 5S rDNA probes labeled with digoxigenin was used to locate rDNA sites on root-tip metaphase chromosomes of Citrus sinensis L. (2n = 2x = 18), Poncirus trifoliata L. Raf. (2n = 2x = 18), and Citrus x Poncirus hybrids (2n = 2x = 18). Counterstaining with the fluorochromes chromomycin A3 and DAPI uniquely identi...

Henochilus wheatlandii, the only species of this genus, is critically endangered and was considered extinct for over a century. The rediscovery of this fish in 1996 made it possible to study its phylogenetic relationships with other species in the subfamily Bryconinae. The aim of this study was to characterise the karyotype of H. wheatlandii. Standard staining, C-positive heterochromatin and nu...

A new method of tumor sensitivity test by measurement of the activity of acid phosphatase was presented. Treatment of experimental tumor cells with mitomycin C, chromomycin Aa and 5-fiuorouracil showed that deviation index of the specific activity ran well parallel with viability of the cells in vitro. The deviation index of tumor cells was also in agreement with survival times of tumor bearing...

An asymmetric potato hybrid and its parental lines were cytogenetically examined. DAPI (4'-6-diamidino-2-phenylindole) staining was used to count chromosomes in all analysed lines and revealed the presence of minichromosomes in the hybrid genome. Fluorescent in situ hybridization (FISH) with rDNA sequence as a probe helped to determine the ploidy level of analysed lines and revealed that none o...

FLOW CYTOGENETICS Flow cytometric analyses of individual chromosomes were made possible by the development of techniques for isolating intact chromosomes (1) and by procedures for staining chromosomes with DNA-specific fluorescent dyes. The term flow cytogenetics (2) was coined in the early 1980s to describe the application of flow cytometry and sorting to chromosome classification and purifica...

Cristina Furdui, Lily Zhou, Ronald W. Woodard and Karen S. Anderson* * Address correspondence to Karen S. Anderson Department of Pharmacology, Yale University School of Medicine 333 Cedar Street, New Haven, Connecticut 06520-8066 Phone: 203-785-4526; Fax: 203-785-7670; e-mail: [email protected] Department of Medicinal Chemistry and Chemistry, University of Michigan Ann Arbor, Michigan 481...