PMID- 15561097 OWN - NLM STAT- MEDLINE DCOM- 20050111 LR - 20061115 IS - 0014-4827 (Print) IS - 0014-4827 (Linking) VI - 302 IP - 2 DP - 2005 Jan 15 TI - The use of non-physiological conditions to isolate fetal cells from maternal blood. PG - 153-61 AB - Fetal cells are always present in maternal blood starting in the first trimester of pregnancy, however a rapid, simple, and consistent procedure for their isolation for prenatal non-invasive genetic investigation is still lacking. Sensitivity and recovery of fetal cells is jeopardized by the minute amount of circulating fetal cells and their loss during the enrichment procedure. We report here a single-step approach to isolate fetal cells from maternal blood which relies on the use of non-physiological conditions to modify cell densities before their separation in a density gradient and in a newly developed cell separation device. Isolated fetal cells have been investigated using cytochemistry, Soret band absorption microscopy, monoclonal antibodies for epsilon- and gamma-chain-Hb, monoclonal antibody for i-antigen, and by fluorescence in situ hybridization (FISH). Fetal cells were always detected in all 105 maternal blood samples investigated and fetal aneuploidies were correctly diagnosed by FISH, in a pilot study of pathological pregnancies, in fetal cells isolated from maternal blood obtained either before or after invasive procedure. FAU - Sitar, Giammaria AU - Sitar G AD - Department of Medicine Policlinico San Matteo and University of Pavia, Italy. g.sitar@smatteo.pv.it FAU - Brambati, Bruno AU - Brambati B FAU - Baldi, Marina AU - Baldi M FAU - Montanari, Laura AU - Montanari L FAU - Vincitorio, Massimo AU - Vincitorio M FAU - Tului, Lucia AU - Tului L FAU - Forabosco, Antonino AU - Forabosco A FAU - Ascari, Edoardo AU - Ascari E LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Exp Cell Res JT - Experimental cell research JID - 0373226 RN - 0 (Antibodies, Monoclonal) RN - 9034-63-3 (Fetal Hemoglobin) SB - IM MH - Aneuploidy MH - Antibodies, Monoclonal/metabolism MH - Blood Cells/*cytology MH - Cell Separation/*methods MH - Female MH - Fetal Blood/*cytology MH - Fetal Diseases/pathology MH - Fetal Hemoglobin/metabolism MH - Hematopoietic Stem Cells/*cytology MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - Male MH - Pilot Projects MH - Polymerase Chain Reaction MH - Pregnancy MH - Pregnancy Trimester, First MH - Prenatal Diagnosis/*methods EDAT- 2004/11/25 09:00 MHDA- 2005/01/12 09:00 CRDT- 2004/11/25 09:00 PHST- 2004/03/17 00:00 [received] PHST- 2004/07/24 00:00 [revised] PHST- 2004/11/25 09:00 [pubmed] PHST- 2005/01/12 09:00 [medline] PHST- 2004/11/25 09:00 [entrez] AID - S0014-4827(04)00516-6 [pii] AID - 10.1016/j.yexcr.2004.08.039 [doi] PST - ppublish SO - Exp Cell Res. 2005 Jan 15;302(2):153-61. doi: 10.1016/j.yexcr.2004.08.039.