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Alternatively spliced NFKB1 transcripts enriched in Andean Aymara modulate inflammation, HIF and hemoglobin

J. Song, S. Han, R. Amaru, L. Lanikova, T. Quispe, D. Kim, JE. Crawford, SJ. Kim, Y. Lee, JT. Prchal

. 2025 ; 16 (1) : 1766. [pub] 20250219

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc25009849

Grantová podpora
1 I01 CX002405-01 U.S. Department of Veterans Affairs (Department of Veterans Affairs)
Development funding Seoul National University
I01 CX002405 CSRD VA - United States
2T32HL007576-31 U.S. Department of Health & Human Services | NIH | National Heart, Lung, and Blood Institute (NHLBI)
T32 HL007576 NHLBI NIH HHS - United States

The molecular basis of increased hemoglobin in Andean Aymara highlanders is unknown. We conducted an integrative analysis of whole-genome-sequencing and granulocytes transcriptomics from Aymara and Europeans in Bolivia to explore genetic basis of the Aymara high hemoglobin. Differentially expressed and spliced genes in Aymaras were associated with inflammatory and hypoxia-related pathways. We identified transcripts with 4th or 5th exon skipping of NFKB1 (AS-NFKB1), key part of NF-kB complex, and their splicing quantitative trait loci; these were increased in Aymaras. AS-NFKB1 transcripts correlated with both transcripts and protein levels of inflammatory and HIF-regulated genes, including hemoglobin. While overexpression of the AS-NFKB1 variant led to increased expression of inflammatory and HIF-targeted genes; under inflammatory stress, NF-kB protein translocation to the nucleus was attenuated, resulting in reduced expression of these genes. Our study reveals AS-NFKB1 splicing events correlating with increased hemoglobin in Aymara and their possible protective mechanisms against excessive inflammation.

Citace poskytuje Crossref.org

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$a The molecular basis of increased hemoglobin in Andean Aymara highlanders is unknown. We conducted an integrative analysis of whole-genome-sequencing and granulocytes transcriptomics from Aymara and Europeans in Bolivia to explore genetic basis of the Aymara high hemoglobin. Differentially expressed and spliced genes in Aymaras were associated with inflammatory and hypoxia-related pathways. We identified transcripts with 4th or 5th exon skipping of NFKB1 (AS-NFKB1), key part of NF-kB complex, and their splicing quantitative trait loci; these were increased in Aymaras. AS-NFKB1 transcripts correlated with both transcripts and protein levels of inflammatory and HIF-regulated genes, including hemoglobin. While overexpression of the AS-NFKB1 variant led to increased expression of inflammatory and HIF-targeted genes; under inflammatory stress, NF-kB protein translocation to the nucleus was attenuated, resulting in reduced expression of these genes. Our study reveals AS-NFKB1 splicing events correlating with increased hemoglobin in Aymara and their possible protective mechanisms against excessive inflammation.
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