{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nFAM159B is an adaptor protein implicated in numerous intracellular signaling pathways. Detailed investigations using immunocytochemistry and immunohistochemistry have demonstrated its widespread cytoplasmic expression in normal neuronal and neuroendocrine tissues, including the cerebral cortex, various ganglia, pancreatic islets, and neuroendocrine cells of the bronchopulmonary and gastrointestinal tracts, as well as in placental trophoblasts. In neoplastic tissues, FAM159B is frequently expressed, with notably high levels in medullary and anaplastic thyroid carcinomas, lung and ovarian carcinomas, lymphomas, and various neuroendocrine tumors."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAdditional studies have shed light on FAM159B’s role in modulating neuroendocrine functions. In a series of cancer cell lines and human pancreatic specimens, FAM159B was found to co-localize with key neuroendocrine differentiation markers—such as synaptophysin, INSM1, various somatostatin receptors, and especially neuron-specific enolase (NSE). Through double-labeling experiments and co-immunoprecipitation analyses, a direct association between FAM159B and NSE was confirmed, suggesting that FAM159B not only supports intracellular signaling mechanisms but may also influence the function or trafficking of critical neuroendocrine membrane receptors."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nTaken together, these findings position FAM159B as a central adaptor protein within neuroendocrine and neuronal systems, where it likely orchestrates multiple signaling cascades by interacting with a variety of intracellular mediators and membrane receptors. This multifaceted functionality underlines its potential significance in both normal physiology and pathological conditions, including tumorigenesis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Anna-Sophia Lieselott Beyer, Daniel Kaemmerer, Jörg Sänger, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Immunohistochemical Evaluation of Adaptor Protein FAM159B Expression in Normal and Neoplastic Human Tissues."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Int J Mol Sci (2021)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.3390/ijms222212250"}], "href": "https://doi.org/10.3390/ijms222212250"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "34830137"}], "href": "https://pubmed.ncbi.nlm.nih.gov/34830137"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Anna-Sophia Liselott Beyer, Daniel Kaemmerer, Jörg Sänger, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Co-Expression of Adaptor Protein FAM159B with Different Markers for Neuroendocrine Cells: An Immunocytochemical and Immunohistochemical Study."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Int J Mol Sci (2022)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.3390/ijms232113503"}], "href": "https://doi.org/10.3390/ijms232113503"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "36362289"}], "href": "https://pubmed.ncbi.nlm.nih.gov/36362289"}]}]}]}