{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nAlthough none of the provided abstracts directly mention or describe LINC02649, a careful review of the literature reveals a detailed landscape of calcium‐handling mechanisms mediated by sarco/endoplasmic reticulum Ca²⁺‐ATPases (SERCAs) that may indirectly contextualize where LINC02649 could be functionally relevant. In pancreatic β‐cells, for example, SERCA3 is not required for maintaining basal cytosolic Ca²⁺ levels but becomes activated under stimulatory conditions—particularly during glucose‐induced Ca²⁺ oscillations—thus ensuring precise insulin secretion. In complementary studies, the modulation of SERCA expression via insulin receptor substrate (IRS) signaling links defects in SERCA2b and SERCA3 transcription to impaired intracellular Ca²⁺ oscillations and insulin secretory responses. These findings underscore the critical role of ER Ca²⁺ reuptake in metabolic regulation and hint that any factor, such as a long noncoding RNA like LINC02649 (if involved), might impact similar processes in β‐cell physiology."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond the β‐cell, SERCA3 plays a distinct role in platelet physiology. Studies show that SERCA3‐dependent Ca²⁺ stores are essential for a specific adenosine diphosphate (ADP) secretion pathway that facilitates full platelet activation, especially when the stimulation is weak. Disruption of SERCA3 function—either by genetic deletion or pharmacological inhibition—leads to impaired Ca²⁺ mobilization, reduced secretion, and ultimately compromised platelet adhesion and thrombus formation. These tissue‐specific roles of SERCA isoforms illustrate the nuanced control of intracellular Ca²⁺ necessary for diverse cellular functions."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition, the transcriptional regulation of SERCA3 in endothelial cells further emphasizes the importance of precise Ca²⁺ handling. A minimal promoter region containing ETS‐binding and Sp1 elements drives basal SERCA3 expression, demonstrating that transcription factor interplay is vital for maintaining proper ER Ca²⁺ levels. Meanwhile, separate research on cardiac remodeling—specifically the balance between atrial natriuretic peptide and aldosterone signaling—underscores broader systemic mechanisms that, although not directly linked to SERCA regulation, highlight the intricacy of intercellular signaling in cardiovascular homeostasis. In light of these studies, while the specific function of LINC02649 is not defined within this collection of abstracts, any future work identifying an association with LINC02649 may benefit from insights into these SERCA‐mediated Ca²⁺ regulatory pathways."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Abdelilah Arredouani, Yves Guiot, Jean-Christophe Jonas, et al. 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"}, {"type": "b", "children": [{"type": "t", "text": "Islet secretory defect in insulin receptor substrate 1 null mice is linked with reduced calcium signaling and expression of sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA)-2b and -3."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Diabetes (2004)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.2337/diabetes.53.6.1517"}], "href": "https://doi.org/10.2337/diabetes.53.6.1517"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "15161756"}], "href": "https://pubmed.ncbi.nlm.nih.gov/15161756"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Prabhakar D Borge, Bryan A Wolf "}, {"type": "b", "children": [{"type": "t", "text": "Insulin receptor substrate 1 regulation of sarco-endoplasmic reticulum calcium ATPase 3 in insulin-secreting beta-cells."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2003)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M209521200"}], "href": "https://doi.org/10.1074/jbc.M209521200"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12524443"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12524443"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Ziane Elaïb, Frédéric Adam, Eliane Berrou, et al. 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