The DUSP23 Knockout K-562 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population in which the DUSP23 gene has been disrupted in the K-562 cell line. This polyclonal format provides a heterogeneous pool of edited alleles, enabling robust loss-of-function studies without the biases introduced by single-cell cloning. The knockout model serves as a versatile tool for investigating DUSP23-dependent regulation of stress-activated MAPK signaling in a leukemia context.
The K-562 host cell line is an immortalized cell line derived from a female patient with chronic myelogenous leukemia in blast crisis. K-562 cells express the BCR-ABL fusion oncoprotein and are widely used as a model system for hematopoietic differentiation and leukemia biology. These cells exhibit features of multipotent hematopoietic progenitors and are responsive to a range of differentiation and stress stimuli, making them particularly suitable for studying signal transduction pathways relevant to leukemogenesis.
DUSP23 encodes a dual-specificity phosphatase that selectively dephosphorylates and inactivates the stress-activated kinases JNK and p38 MAPK. Activation of DUSP23 is typically induced by stress stimuli and MAPK pathway activation, potentially involving transcriptional regulators such as AP-1. By dephosphorylating JNK and p38, DUSP23 attenuates downstream phosphorylation of transcription factors including c-Jun and ATF-2, and reduces the activity of MAPKAPK2. Representative upstream kinases in these cascades include MAP3Ks such as MEKK1 and ASK1, and MAP2Ks including MKK4 and MKK7 for JNK, and MKK3 and MKK6 for p38. Thus, DUSP23 functions as a critical negative feedback regulator within the MAPK signaling network.
In the context of K-562 leukemia cells, disruption of DUSP23 is expected to result in sustained or aberrant JNK and p38 MAPK activity, potentially altering downstream transcriptional programs governed by c-Jun and ATF-2. Given the BCR-ABL-positive background, this knockout model allows dissection of how DUSP23 intersects with oncogenic tyrosine kinase signaling and stress-activated responses. The polyclonal population avoids single-cell clonal artifacts and provides a pooled loss-of-function system to evaluate functional consequences on cell proliferation, apoptosis, and differentiation, thereby modeling aspects of leukemic progression where MAPK pathway dysregulation is implicated.
This DUSP23 knockout cell model is suitable for a broad range of experimental applications, including interrogation of JNK and p38 MAPK signaling dynamics by phospho-specific western blotting or RNA-seq transcriptome profiling. It enables functional studies of stress-induced apoptosis and drug resistance mechanisms in a BCR-ABL-positive background, using assays such as proliferation and apoptosis analysis. The cells are also valuable for dissecting downstream effectors of BCR-ABL that converge on MAPK cascades and for phospho-signaling pathway screens. For further information, please contact Ascent Research.
