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CKS1B/CDKN2C(P18) Amplification/Deletion

Catalogue Numbers
LPH 039-S (5 tests)
LPH 039 (10 tests)

Probe Specification

  • CKS1B, 1q21.3, Red
  • CDKN2C (P18), 1p32.3, Green

The CKS1B/CDKN2C product consists of a 180kb probe, labelled in red, covering the entire CKS1B gene and flanking regions, including the PYOG2 and ZBTB7B genes, and a green probe covering a 168kb region, including the entire CDKN2C gene, the D1S1661 marker and the centromeric end of the FAF1 gene.

Probe Information

Structural abnormalities of chromosome 1 are frequently detected in multiple myeloma and have been correlated with more advanced disease1.

Amplification of 1q21 (CKS1B) is one of the most recurrent chromosomal aberrations in multiple myeloma3. Over-expression of the CKS1B gene up-regulates cell cycle progression, resulting in a more proliferative disease2. This is related to the advanced phenotype of multiple myeloma and may therefore be associated with poor prognosis and disease progression3. Gain of 1q21 has been linked to inferior survival and further amplification is observed in disease relapse. It has been shown that gain of 1q21 copy number is not an independent prognostic factor in multiple myeloma and it is often associated with other chromosomal aberrations, most commonly t(4:14)(p16;q32) (IGH-FGFR3) and chromosome 13 deletion2. The association of 1q21 gain and loss of chromosome 13 has been linked to the risk of conversion to overt disease2. In a case study of multiple myeloma patients, it was discovered that 30% of chromosomal abnormalities mapped to chromosome 1, that most up-regulated genes mapped to chromosome 1q and down-regulated genes to chromosome 1p4. Gains of the long arm 1q are one of the most common genetic abnormalities in multiple myeloma5and duplications of chromosome band 1q are frequently associated with disease progression3,6,7.

CDKN2C (P18), in band 1p32.3, is a tumour suppressor gene responsible for inducing apoptotic cell death and DNA fragmentation8. It is up-regulated by the expression of the cytokine IL-6 in multiple myeloma and homozygous deletion of the gene is associated with a more proliferative disease8. Although CDKN2C deletions have been reported to be rare in human malignancy, cytogenetic analyses have shown that abnormalities of 1p32-36 occur in around 16% of human multiple myeloma9.

In our hands, Cytocell FISH probes,have proven to be of the highest quality with bright, easy to interpret signals, thus providing confidence in our results. Cytocell’s customer support is outstanding, as their staff are extremely knowledgeable and truly care about their customers and their customers’ needs. Jennie Thurston, Director of Cytogenetics at Carolinas Pathology Group


1. Tasaka et al., Br J Haematology 1997;96(1):98-102

2. Fonseca et al., Leukemia 2006;20(11):2034-40

3. Hanamura I, Blood 2006;108(5):1724-32

4. Shaughnessy JD, Blood 2007;109(6):2276-84

5. Avet-Loiseau H, Genes Chromosomes Cancer 1997;19(2):124-33

6. Sawyer JR, Blood 1998;91(5):1732-41

7. Le Baccon P et al., Genes Chromosomes Cancer 2001;32(3):250-64

8. Leone et al., Clin Cancer Res. 2008;14(19):6033-41

9. Kulkarni et al., Leukemia 2006;16:127-34

Microscope Images

CKS1B CDKN2C(P18) Amplification Deletion magnified
Area of Interest*


This product is intended to be used on Carnoy’s solution (3:1 methanol/acetic acid) fixed haematological samples.

*Disease information supported by the literature and is not a reflection of the intended purpose of this product.