JUNB and JUND in Urological Cancers: A Literature Review
Georgios Kalampounias1,2, Theodosia Androutsopoulou1, Panagiotis Katsoris1
1Laboratory of Cell Biology, Division of Genetics, Cell and Developmental Biology, Department of Biology, School of Natural Sciences, University of Patras, 26504 Patras, Greece.
Abstract:
JUNB and JUND are two transcriptional factors (TFs) of increased interest in cancer, regulating the expression of genes associated with survival, proliferation, differentiation, migration, invasion, angiogenesis, adhesion, apoptosis, and cell cycle regulation. Together with c-JUN, they constitute the JUN family of TFs, acting as downstream effectors of the MAPKs, with established roles in carcinogenesis, disease progression, metastasis, and therapy resistance. Their phosphorylation leads to the formation of dimeric complexes with other TFs (from the JUN, FOS, or ATF families), thereby assembling the AP-1 complex, which exerts multifaceted influences on both normal and cancerous cells. JUNB and JUND are credited with both tumor-suppressing and oncogenic roles, since the outcome of their activation relies on the specific cancer type, disease stage, intracellular localization, and the expression of interacting cofactors. This narrative review explores the current understanding of JUNB and JUND roles within urological cancers (prostate, bladder, renal, and testicular cancer) as these malignancies, while distinct, share common genetic and/or environmental risk factors and varying degrees of androgen receptor (AR) dependency. The study discusses commonalities and differences in the expression patterns, mechanisms, and clinical implications of JUNB and JUND across urological cancers, thus highlighting their potential as prevention, diagnosis, prognosis, and treatment targets.
Insights
JUNB and JUND are key transcriptional factors in cancer. This review examines their dual roles in urological cancers, highlighting their potential as therapeutic targets.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- JUNB and JUND are transcriptional factors (TFs) integral to cellular processes.
- They are part of the JUN TF family, downstream effectors of MAPKs, and play roles in carcinogenesis and metastasis.
- These TFs form the AP-1 complex, influencing normal and cancerous cells, with context-dependent tumor-suppressing or oncogenic functions.
Purpose of the Study:
- To review the roles of JUNB and JUND in urological cancers (prostate, bladder, renal, testicular).
- To discuss shared and distinct expression patterns, mechanisms, and clinical implications of JUNB and JUND across these cancers.
- To highlight the potential of JUNB and JUND as targets for cancer prevention, diagnosis, prognosis, and treatment.
Main Methods:
- Narrative review of existing literature on JUNB and JUND in urological cancers.
- Analysis of commonalities and differences in TF expression, function, and clinical relevance.
- Exploration of potential therapeutic strategies targeting JUNB and JUND.
Main Results:
- JUNB and JUND exhibit context-dependent roles, acting as both tumor suppressors and oncogenes in urological malignancies.
- Expression patterns and mechanisms of JUNB and JUND vary across prostate, bladder, renal, and testicular cancers.
- Their involvement in cancer progression and therapeutic resistance is significant.
Conclusions:
- JUNB and JUND are critical regulators in urological cancers with multifaceted roles.
- Understanding their specific functions in different urological malignancies is crucial for targeted therapies.
- JUNB and JUND represent promising targets for improving prevention, diagnosis, prognosis, and treatment strategies in urological cancers.
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