Molecular Mechanisms of Breast Cancer Metastasis: Gap Junction Intercellular Communication and the Bone Microenvironment
2010
- 9Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Metrics Details
- Usage9
- Downloads5
- Abstract Views4
Thesis / Dissertation Description
Metastatic disease accounts for the overwhelming majority of cancer related deaths. More specifically, breast cancer remains one of the leading causes of death in women and breast cancer cells metastasize to bone more than any other secondary site. Upon arriving within the bone microenvironment, breast cancer cells interact with bone marrow cells, leading to changes in bone biology that favor growth of the cancer cells. Additionally, some cancer cells are capable of direct cellular communication with cells at metastatic sites via dysregulation of a family of proteins known as connexins. This direct, physical communication is known as gap junctional intercellular communication (GJIC) and can aid in the initial survival and proliferation of metastatic cells. The understanding of how breast cancer cells interact at secondary sites, specifically bone, will lead to more efficacious therapies for patients with metastasis. In the first portion of this thesis, I set out to examine the molecular mechanisms responsible for GJIC (dys)regulation in tumorigenic and metastatic cell lines. I demonstrate the delineation of two common signaling pathways in relation to GJIC in cancer cells, PI3K and PKA , and show that PKA mediated regulation of connexin proteins is often altered during tumorigenesis and its restoration is capable of causing connexin subcellular relocalization and a corresponding increase in GJIC. I also examine a possible role for the metastasis suppressor BRMS1 in mediating changes in GJIC through modulation of potassium channels. In the second portion, I studied the interactions of breast cancer cells with osteoblasts both in vitro and in vivo using a murine xenograft model of breast cancer induced osteolysis. The results provided novel data that osteoblasts play roles in promoting breast cancer cell proliferation in early stages of bone metastasis, highlighting an underappreciated interaction between these cell types. Collectively, the data presented here provide important discoveries on two aspects of breast cancer cell bone metastasis: breast cancer cell dysregulation of connexin function, and communication with osteoblasts.
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