HIF‐1 Signaling Pathway Implicated in Phenotypic Instability in a Chinese Hamster Ovary Production Cell Line

2020 ◽  
Vol 15 (4) ◽  
pp. 1900306
Author(s):  
Paulena L. Lieske ◽  
Wei Wei ◽  
Kerstin B. Crowe ◽  
Bruno Figueroa ◽  
Lin Zhang
Keyword(s):  
Cell Line ◽  
Signaling Pathway ◽  
Chinese Hamster Ovary ◽  
Chinese Hamster ◽  
Production Cell Line ◽  
Phenotypic Instability ◽  
Production Cell

scholarly journals Chinese hamster ovary cell line DXB-11: chromosomal instability and karyotype heterogeneity

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Victoria I. Turilova ◽  
Tatyana S. Goryachaya ◽  
Tatiana K. Yakovleva
Keyword(s):  
Cell Line ◽  
Cell Lines ◽  
Chinese Hamster Ovary Cell ◽  
Chinese Hamster Ovary ◽  
Chinese Hamster ◽  
Chromosome 8 ◽  
Ovary Cell ◽  
Differential Staining ◽  
Nucleolar Organizer Regions ◽  
Karyotype Heterogeneity

Abstract Background Chinese hamster ovary cell lines, also known as CHO cells, represent a large family of related, yet quite different, cell lines which are metabolic mutants derived from the original cell line, CHO-ori. Dihydrofolate reductase-deficient DXB-11 cell line, one of the first CHO derivatives, serves as the host cell line for the production of therapeutic proteins. It is generally assumed that DXB-11 is identical to DUKX or CHO-DUK cell lines, but, to our knowledge, DXB-11 karyotype has not been described yet. Results Using differential staining approaches (G-, C-banding and Ag-staining), we presented DXB-11 karyotype and revealed that karyotypes of DXB-11 and CHO-DUK cells have a number of differences. Although the number of chromosomes is equal—20 in each cell line—DXB-11 has normal chromosomes of the 1st and 5th pairs as well as an intact chromosome 8. Besides, in DXB-11 line, chromosome der(Z9) includes the material of chromosomes X and 6, whereas in CHO-DUK it results from the translocation of chromosomes 1 and 6. Ag-positive nucleolar organizer regions were revealed in the long arms of chromosome del(4)(q11q12) and both chromosome 5 homologues, as well as in the short arms of chromosomes 8 and add(8)(q11). Only 19 from 112 (16.96%) DXB-11 cells display identical chromosome complement accepted as the main structural variant of karyotype. The karyotype heterogeneity of all the rest of cells (93, 83.04%) occurs due to clonal and nonclonal additional structural rearrangements of chromosomes. Estimation of the frequency of chromosome involvement in these rearrangements allowed us to reveal that chromosomes 9, der(X)t(X;3;4), del(2)(p21p23), del(2)(q11q22) /Z2, der(4) /Z7, add(6)(p11) /Z8 are the most stable, whereas mar2, probably der(10), is the most unstable chromosome. A comparative analysis of our own and literary data on CHO karyotypes allowed to designate conservative chromosomes, both normal and rearranged, that remain unchanged in different CHO cell lines, as well as variable chromosomes that determine the individuality of karyotypes of CHO derivatives. Conclusion DXB-11and CHO-DUK cell lines differ in karyotypes. The revealed differential instability of DXB-11 chromosomes is likely not incidental and results in karyotype heterogeneity of cell population.

Atrazine Exposure Decreases Cell Proliferation in Chinese Hamster Ovary (CHO-K1) Cell Line

2008 ◽  
Vol 81 (2) ◽  
pp. 205-209 ◽  
Author(s):  
I. Kmetič ◽  
V. Gaurina Srček ◽  
I. Slivac ◽  
B. Šimić ◽  
Z. Kniewald ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Cell Line ◽  
Chinese Hamster Ovary ◽  
Chinese Hamster

Characterization of an oxygen-tolerant cell line derived from Chinese hamster ovary

1985 ◽  
Vol 239 (1) ◽  
pp. 61-68 ◽  
Author(s):  
P. van der Valk ◽  
J. J. P. Gille ◽  
A. B. Oostra ◽  
E. W. Roubos ◽  
T. Sminia ◽  
...  
Keyword(s):  
Cell Line ◽  
Chinese Hamster Ovary ◽  
Chinese Hamster ◽  
Tolerant Cell
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