Cytogenetics of B-Chromosomes

Sponge cytogenetics - mitotic chromosomes of ten species of freshwater sponge.

Porifera (sponges) are the most basal phylum of extant metazoans. To gain insight into sponge genome construction, cytogenetic analysis was performed for ten freshwater sponge species of six genera, using conventional Giemsa staining, chromosome banding, and fluorescence in-situ hybridization. The karyotypes were very similar among the ten species, exhibiting a diploid chromosome number of 2n=4...

Avian Meiotic Chromosomes as Model Objects in Cytogenetics

Cytogenetics and molecular cytogenetics in diffuse large B-cell lymphoma (DLBCL).

BACKGROUND Diffuse large B-cell lymphoma (DLBCL) accounts for up to 40% of all non-Hodgkin's lymphomas diagnosed in the western hemisphere. Determination of the gene expression profile has confirmed the physiological heterogeneity of the disease and defined three molecular prognostic subgroups - germinal center B-cell-like (GCB), activated B-cell-like (ABC) and primary mediastinal B-cell lympho...

B chromosomes in Brazilian rodents.

B chromosomes are now known in eight Brazilian rodent species: Akodon montensis, Holochilus brasiliensis, Nectomys rattus, N. squamipes, Oligoryzomys flavescens, Oryzomys angouya, Proechimys sp. 2 and Trinomys iheringi. Typically these chromosomes are heterogeneous relative to size, morphology, banding patterns, presence/absence of NORs, and presence/absence of interstitial telomeric signals af...

Analysis of chromosomes in molecular tumor and radiation cytogenetics: approaches, applications, perspectives.

For the study of pathological processes the analysis of chromosomes has become of ever growing importance. Today, entire journals are dedicated to this task; thousands of publications so far have shown a close correlation between chromosome aberrations and malignancy (Dal Cin and Sandberg, 1989). Presently, information is available on more than 14,000 neoplasms with an abnormal karyotype (Mitel...