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Klk4t2 is a hormonally regulated transcript from the klk4 locus

Lundwall, Åke LU ; Ylitalo, Erik Bovinder ; Wikström, Pernilla and Brattsand, Maria (2021) In International Journal of Molecular Sciences 22(23).
Abstract

The human kallikrein-related peptidase 4 (KLK4) and the transcribed pseudogene KLKP1 are reported to be highly expressed in the prostate. When trying to clone transcripts of KLKP1, we partly failed. Instead, we identified an androgen-regulated transcript, KLK4T2, which appeared to be a splice variant of KLK4 that also contained exons of KLKP1. Expression analysis of KLK4, KLK4T2, and KLKP1 transcripts in prostate cancer cell lines showed high levels of KLKP1 transcripts in the nucleus and in unfractionated cell extract, whereas it was almost completely absent in the cytoplasmatic fraction. This was in contrast to KLK4 and KLK4T2, which displayed high to mod-erate levels in the cytoplasm. In patient cohorts we found significantly higher... (More)

The human kallikrein-related peptidase 4 (KLK4) and the transcribed pseudogene KLKP1 are reported to be highly expressed in the prostate. When trying to clone transcripts of KLKP1, we partly failed. Instead, we identified an androgen-regulated transcript, KLK4T2, which appeared to be a splice variant of KLK4 that also contained exons of KLKP1. Expression analysis of KLK4, KLK4T2, and KLKP1 transcripts in prostate cancer cell lines showed high levels of KLKP1 transcripts in the nucleus and in unfractionated cell extract, whereas it was almost completely absent in the cytoplasmatic fraction. This was in contrast to KLK4 and KLK4T2, which displayed high to mod-erate levels in the cytoplasm. In patient cohorts we found significantly higher expression of both KLK4T2 and KLK4 in benign prostatic hyperplasia compared to both primary prostate cancer and bone metastasis. Analysis of tissue panels demonstrated the highest expression of KLK4T2 in the prostate, but in contrast to the classical KLK4, relatively high levels were also found in placenta. So far, the function of KLK4T2 is still to be explored, but the structure of the translation product indicated that it generates a 17.4 kDa intracellular protein with possible regulatory function.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bone metastasis, Kallikrein-related peptidases, KLK4, KLK4T2, KLKP1, Prostate cancer, Splice variant, Transcripts
in
International Journal of Molecular Sciences
volume
22
issue
23
article number
13023
publisher
MDPI AG
external identifiers
  • scopus:85120163078
  • pmid:34884832
ISSN
1661-6596
DOI
10.3390/ijms222313023
language
English
LU publication?
yes
id
a8d664cd-702c-4746-af2e-2fd7af64fcbf
date added to LUP
2021-12-15 11:17:35
date last changed
2024-06-15 22:44:59
@article{a8d664cd-702c-4746-af2e-2fd7af64fcbf,
  abstract     = {{<p>The human kallikrein-related peptidase 4 (KLK4) and the transcribed pseudogene KLKP1 are reported to be highly expressed in the prostate. When trying to clone transcripts of KLKP1, we partly failed. Instead, we identified an androgen-regulated transcript, KLK4T2, which appeared to be a splice variant of KLK4 that also contained exons of KLKP1. Expression analysis of KLK4, KLK4T2, and KLKP1 transcripts in prostate cancer cell lines showed high levels of KLKP1 transcripts in the nucleus and in unfractionated cell extract, whereas it was almost completely absent in the cytoplasmatic fraction. This was in contrast to KLK4 and KLK4T2, which displayed high to mod-erate levels in the cytoplasm. In patient cohorts we found significantly higher expression of both KLK4T2 and KLK4 in benign prostatic hyperplasia compared to both primary prostate cancer and bone metastasis. Analysis of tissue panels demonstrated the highest expression of KLK4T2 in the prostate, but in contrast to the classical KLK4, relatively high levels were also found in placenta. So far, the function of KLK4T2 is still to be explored, but the structure of the translation product indicated that it generates a 17.4 kDa intracellular protein with possible regulatory function.</p>}},
  author       = {{Lundwall, Åke and Ylitalo, Erik Bovinder and Wikström, Pernilla and Brattsand, Maria}},
  issn         = {{1661-6596}},
  keywords     = {{Bone metastasis; Kallikrein-related peptidases; KLK4; KLK4T2; KLKP1; Prostate cancer; Splice variant; Transcripts}},
  language     = {{eng}},
  number       = {{23}},
  publisher    = {{MDPI AG}},
  series       = {{International Journal of Molecular Sciences}},
  title        = {{Klk4t2 is a hormonally regulated transcript from the klk4 locus}},
  url          = {{http://dx.doi.org/10.3390/ijms222313023}},
  doi          = {{10.3390/ijms222313023}},
  volume       = {{22}},
  year         = {{2021}},
}