ANXA2 Regulates RANKL-Induced Osteoclast Differentiation Through STAT3 Signaling in Breast Cancer
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.This study shows Annexin A2 (ANXA2) drives breast cancer bone metastasis by promoting osteoclast differentiation via the STAT3-RANKL pathway. Targeting this axis may offer new therapeutic strategies.
Area Of Science
- Oncology
- Molecular Biology
- Cancer Metastasis
Background
- Bone metastasis significantly impacts survival in advanced breast cancer patients.
- Osteoclasts are critical in osteolysis and bone tumor cell metastasis.
- Annexin A2 (ANXA2) is implicated in breast cancer invasion but its role in bone metastasis is unclear.
Purpose Of The Study
- To investigate the role of ANXA2 in breast cancer bone metastasis.
- To elucidate the molecular mechanisms by which ANXA2 influences osteoclastogenesis and bone metastasis.
Main Methods
- Analyzed ANXA2 expression and survival correlation in breast cancer cohorts.
- Utilized RAW264.7 cells to assess ANXA2's effect on osteoclast differentiation.
- Investigated the STAT3 signaling pathway and RANKL regulation using RT-PCR, Western blot, and dual luciferase reporter assays.
Main Results
- ANXA2 upregulation correlated with poor survival in breast cancer patients.
- ANXA2 enhanced osteoclast differentiation and upregulated osteoclast-associated genes.
- ANXA2 activated STAT3 signaling, increasing RANKL expression via direct binding to the RANKL promoter.
Conclusions
- ANXA2 is a key regulator of osteoclast differentiation and breast cancer bone metastasis.
- The ANXA2/STAT3/RANKL axis is a crucial pathway in driving bone metastasis.
- Targeting the ANXA2/STAT3/RANKL axis presents a potential therapeutic strategy for bone metastasis.
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
Related Concept Videos
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...