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Karyotype
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This is a hypotriploid human cell line with a modal chromosome number of 59. QM staining verified the absence of a Y chromosome. The rate of polyploidy in excess of the modal number is 33.8%. There were 8 consistent derivative chromosomes: del(1)(q12), del(2)(?q36), der(3)t(3;15)(q10;p10), der(5)t(5;8)(p10;q10), i(6)(p10), del(11)(p12),i(17)(q10), der(19)(19pter<-q13::5q13<-qter) plus two markers of unknown origin and one minute chromosome. Normal chromosome 17's were absent and only a single normal 15 was seen in most cells. No brightly fluorescent Y chromosomes were detected with QM staining. Number of cells examined = 50; Modal Chromosome Number = 59 with a range of 50 to 77; Polyploidy Rate = 33.8% Composite karyotype: 50-77 <3n> X, -1, del(1)(q12), -2, del(2)(?q36), der(3)t(3;15)(q10;p10),-4, -5,der(5)t(5;8)(p10;q10),-6, i(6)(p10), +8, -9, -10, -11, del(11)(p12), -12, -13, -14, -15, -15, -16, -17, -17, -17, i(17)(q10), -18, -19,der(19)(19pter<-q13::5q13<-qter), +22, +3 mar[cp12]. There are 8 consistent derivative chromosomes: del(1)(q12), del(2)(?q36), der(3)t(3;15)(q10;p10), der(5)t(5;8)(p10;q10), i(6)(p10), del(11)(p12), i(17)(q10), der(19)(19pter<-q13::5q13<-qter) plus two markers of unknown origin and one minute chromosome. Four other markers, including two derivative chromosome 1s were noted are lower frequency.
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Derivation
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It was originated by A.J. Hackett, et al. along with the Hs 578Bst (see ATCC HTB-125), which is a normal fibroblast-like line from the same patient. The Hs 578T cell strain was derived from a carcinoma of the breast.
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Clinical Data
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74 years adult along with the Hs 578Bst (see ATCC HTB-125), which is a normal fibroblast-like line from the same patient. Caucasian female
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Receptor Expression
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Receptor expression: estrogen receptor, not expressed Ref Hackett AJ, et al. Two syngeneic cell lines from human breast tissue: the aneuploid mammary epithelial (Hs 578T) and the diploid myoepithelial (Hs 578Bst) cell lines. J. Natl. Cancer Inst. 58: 1795-1806, 1977. PubMed: 864756
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Comments
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The Hs 578T line had a mixed polygonal morphology initially, but a stellate cell type was selected for during passage and by cloning.
Aggregates of casein protein granules, desmosomes, tight junctions, lipid droplets and vesicularized smooth endoplasmic reticulum were observed by electron microscopy.
As with Hs 578Bst, no estrogen receptors or endogenous viruses were detected.
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