{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nA careful review of the provided abstracts reveals that none of these studies address or mention TAF11L6. Instead, the published work focuses on the regulation of renal and intestinal transporters that control citrate and oxalate homeostasis—processes critical for preventing Ca²⁺-oxalate kidney stone formation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " In one study, disruption of the oxalate transporter SLC26A6 in mice led to enhanced activity of the Na⁺-coupled dicarboxylate transporter (NaDC1), resulting in increased renal uptake of metabolic intermediates, urinary hyperoxaluria, and hypocitraturia, an interplay that underpins the regulation of citrate reabsorption."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFurther research using NaDC1-deficient mice confirmed that although NaDC1 is responsible for reabsorbing various Krebs cycle intermediates in the kidney, its absence did not produce significant changes in renal function under normal or ischemic conditions."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " Additional studies demonstrated that acid loads stimulate NaDC1 activity via endothelin-1 signaling through the ETB receptor, suggesting that acid-base disturbances activate conserved pathways to adjust citrate reabsorption."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nOther investigations highlighted that the sodium-coupled electrogenic bicarbonate cotransporter NBCe1-A plays a critical role in maintaining basal and adaptive citrate metabolism by modulating NaDC1 expression in specific segments of the proximal tubule."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": " Finally, structure–function analyses of NaDC1 identified key contributions from transmembrane helices 3 and 4 in determining substrate specificity and catalytic efficiency."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn summary, while these abstracts collectively underscore the complex regulatory networks that control citrate and oxalate homeostasis in the kidney, they do not provide any insights into the function of TAF11L6.\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Ehud Ohana, Nikolay Shcheynikov, Orson W Moe, et al. "}, {"type": "b", "children": [{"type": "t", "text": "SLC26A6 and NaDC-1 transporters interact to regulate oxalate and citrate homeostasis."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Am Soc Nephrol (2013)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1681/ASN.2013010080"}], "href": "https://doi.org/10.1681/ASN.2013010080"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "23833257"}], "href": "https://pubmed.ncbi.nlm.nih.gov/23833257"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "H T B Ho, B C B Ko, A K H Cheung, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Generation and characterization of sodium-dicarboxylate cotransporter-deficient mice."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Kidney Int (2007)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/sj.ki.5002258"}], "href": "https://doi.org/10.1038/sj.ki.5002258"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17410095"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17410095"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Liping Liu, Miriam Zacchia, Xuefei Tian, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Acid regulation of NaDC-1 requires a functional endothelin B receptor."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Kidney Int (2010)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/ki.2010.264"}], "href": "https://doi.org/10.1038/ki.2010.264"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "20703215"}], "href": "https://pubmed.ncbi.nlm.nih.gov/20703215"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Gunars Osis, Kierstin L Webster, Autumn N Harris, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Regulation of renal NaDC1 expression and citrate excretion by NBCe1-A."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Am J Physiol Renal Physiol (2019)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1152/ajprenal.00015.2019"}], "href": "https://doi.org/10.1152/ajprenal.00015.2019"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "31188034"}], "href": "https://pubmed.ncbi.nlm.nih.gov/31188034"}]}, {"type": "r", "ref": 5, "children": [{"type": "t", "text": "Naomi Oshiro, Steven C King, Ana M Pajor "}, {"type": "b", "children": [{"type": "t", "text": "Transmembrane helices 3 and 4 are involved in substrate recognition by the Na+/dicarboxylate cotransporter, NaDC1."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Biochemistry (2006)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1021/bi052328g"}], "href": "https://doi.org/10.1021/bi052328g"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "16475819"}], "href": "https://pubmed.ncbi.nlm.nih.gov/16475819"}]}]}]}