Systemic Lupus Erythematosus and Hereditary Coproporphyria: Two Different Entities Diagnosed by WES in the Same Patient.

{"sci_version": "1.0", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:35669728", "kind": "science-record", "revision": 3, "content_hash": "sha256:2012deb1bc3171f9450c73aa2db34422b588a979a0eafd53e31f638304796f34", "created_at": "2026-11-01T18:14:37Z", "updated_at": "2026-11-01T21:28:03Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "Systemic Lupus Erythematosus and Hereditary Coproporphyria: Two Different Entities Diagnosed by WES in the Same Patient.", "doi": "10.1155/2022/9096999", "pmid": "35669728", "authors": ["Anlei Liu", "Lingli Zhou", "Huadong Zhu", "Yi Li", "Jing Yang"], "journal": "BioMed research international", "year": 2022, "abstract": "Background: Hereditary coproporphyria (HCP) is a rare autosomal dominant disorder caused by a partial deficiency of coproporphyrinogen III oxidase (CPOX), and systemic lupus erythematosus (SLE) is an autoimmune disease with a strong genetic predisposition. SLC7A7 (solute carrier family 7 member 7) may be associated with monogenic lupus disease; however, only 2 cases of concomitant HCP and SLE have been reported.\nMethods: We report a 30-year-old woman with a six-year history of SLE presenting with abdominal pain, vomiting, dysuria, tachycardia, and hyponatremia. Whole exome sequencing (WES) and Sanger sequencing were carried out for the proband and members of her pedigree to detect the genetic background. The Gene Expression Omnibus (GEO) database was used to search the related gene expression profiles. Differentially expressed genes (DEGs) were identified using GEO2R.\nResult: A novel heterozygous splicing mutation of CPOX (NM_000097): c.700+2 T > C (intron 2) was detected by WES in the proband, and it was considered likely pathogenic (PSV1+PM2). Sanger sequencing verified the heterozygous mutation of CPOX in the proband, although it was not detected in her father. WES also identified 62 other gene variants, especially two heterozygous variants in SLC7A7 (NM_001126106): c.250G > A (p. V84I) and c.625+1G > A (splicing). DEGs were detected from GSE51997, and the expression of CPOX was downregulated in SLE patients compared with normal controls (adj. P = 0.0071, logFC = -1.0975).\nConclusion: This study presents the first reported case of SLE coexisting with HCP in China; moreover, a novel splicing mutation of CPOX, i.e., c.700+2 T > C (intron 2), and two heterozygous mutations of SLC7A7 were reported. The simultaneous mutations of CPOX and SLC7A7 may explain the etiopathogenetic connections of HCP and SLE.", "claims": [{"id": "claim-method", "statement": "The adjusted P values (adj. 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The raw data is available upon request from the corresponding author.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:35669728", "locator": "sections[16] \"Data Availability\" paragraph 2", "quote": "All data generated or analyzed during this study are included in the published article. The raw data is available upon request from the corresponding author."}], "state": "complete"}, {"id": "claim-target-result", "statement": "GEO2R analysis of the GSE51997 expression dataset found that CPOX was downregulated in SLE patients compared with normal controls (adj. P = 0.0071, logFC = −1.0975).", "kind": "quantitative", "target": {"value": 0.0071, "unit": "p-value", "tolerance": null, "source": "The expression of CPOX was downregulated in SLE patients compared with normal controls (adj. P = 0.0071, logFC = −1.0975)."}, "evidence": [{"asset": "source:pmid:35669728", "locator": "sections[10] \"3.2. 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