title: Determination of a translocation chromosome by atomic force microscopy.
abstract: Atomic force microscopy (AFM) has been used to study the translocation involving chromosomes 11 and 13. An amniocentesis procedure was performed at 18 weeks of pregnancy on a familial balanced translocation carrier mother whose karyotype was 46,XX,t(11;13) (q23;q34). After harvesting the tissue cultures, light microscopy studies (LM) have indicated that the fetus had the same translocation. A 0.3 microm gap region on the derivative chromosome 13 was determined by AFM; it was equivalent to a mid-sized G-band. The enhanced resolution of AFM with respect to its line measure analysis and three-dimensional image capture capability has allowed an extension and reconsideration of conclusions about chromosomal aberrations based on the study of LM preparations. In this manner, chromosomal disorders will be studied at nanoscale to help in the planning of new therapy strategies.
authors.affiliation: Department of Medical Biology and Genetics, Gazi University, Ankara, Turkey. ergun@tr.net
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Ergun
authors.forename: Meral Yirmibes
authors.initials: MY
authors.lastname: Karaoguz
authors.forename: Gonul Didem
authors.initials: GD
authors.lastname: Ince
authors.forename: Erdal
authors.initials: E
authors.lastname: Tan
authors.forename: Adnan
authors.initials: A
authors.lastname: Menevse
mesh_terms: D000328:Adult; D000649:Amniocentesis; D002869:Chromosome Aberrations; D025063:Chromosome Disorders / Q000175:diagnosis*; D002880:Chromosomes, Human, Pair 11 / Q000648:ultrastructure*; D002882:Chromosomes, Human, Pair 13 / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D008297:Male; D008677:Metaphase; D018625:Microscopy, Atomic Force / Q000379:methods*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D014178:Translocation, Genetic