{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T06:26:05Z","timestamp":1769063165234,"version":"3.49.0"},"reference-count":29,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,5,29]],"date-time":"2024-05-29T00:00:00Z","timestamp":1716940800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Laboratory of Biotechnology","award":["2022-2.1.1-NL-2022-00008"],"award-info":[{"award-number":["2022-2.1.1-NL-2022-00008"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Pathogenic variants in the FAN1 gene lead to a systemic disease with karyomegalic interstitial nephritis (KIN) at the forefront clinically. The phenotypic\u2013genotypic features of a FAN1 mutation-related disease involving five members of a Hungarian Caucasian family are presented. Each had adult-onset chronic kidney disease of unknown cause treated with renal replacement therapy and elevated liver enzymes. Short stature, emaciation, latte-colored skin, freckles, and a hawk-like nose in four patients, a limited intellect in two patients, and chronic restrictive lung disease in one patient completed the phenotype. Severe infections occurred in four patients. All five patients had ceased. Four patients underwent autopsy. KIN and extrarenal karyomegaly were observed histologically; the livers showed no specific abnormality. The genotyping using formalin-fixed tissue samples detected a hitherto undescribed homozygous FAN1 mutation (c.1673_1674insT\/p.Met558lfs*4; exon 5) in three of these patients and a heterozygous FAN1 mutation in one patient. The reason for the heterozygosity is discussed. In addition, 56 family members consented to the screening for FAN1 mutation from which 17 individuals proved to be heterozygous carriers; a blood chemistry evaluation of their kidney and liver function did not find any abnormality. The clinical presentation of FAN1-related disease was multifaceted, and not yet described manifestations were observed besides kidney and liver disease. Mutation in this gene should be suspected in adults with small kidneys of unknown cause, elevated liver enzymes, and recurrent infections, even without a family history.<\/jats:p>","DOI":"10.3390\/ijms25115907","type":"journal-article","created":{"date-parts":[[2024,5,29]],"date-time":"2024-05-29T03:38:30Z","timestamp":1716953910000},"page":"5907","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Phenotypic and Genotypic Features of the FAN1 Mutation-Related Disease in a Large Hungarian Family"],"prefix":"10.3390","volume":"25","author":[{"given":"Ildik\u00f3","family":"Cs\u00e1sz\u00e1r","sequence":"first","affiliation":[{"name":"Department of Internal Medicine, CSMEKHM Health Care Center, 6800 H\u00f3dmez\u0151v\u00e1s\u00e1rhely, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0419-2009","authenticated-orcid":false,"given":"Tibor","family":"Kalm\u00e1r","sequence":"additional","affiliation":[{"name":"Genetic Diagnostic Laboratory, Department of Pediatrics, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0515-117X","authenticated-orcid":false,"given":"Zolt\u00e1n","family":"Mar\u00f3ti","sequence":"additional","affiliation":[{"name":"Genetic Diagnostic Laboratory, Department of Pediatrics, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J\u00e1nos","family":"\u00c1v\u00e9d","sequence":"additional","affiliation":[{"name":"General Practitioner\u2019s Office, 6630 Mindszent, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edit","family":"Szederk\u00e9nyi","sequence":"additional","affiliation":[{"name":"Renal Transplantation Unit, Department of Surgery, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J\u00e1nos","family":"Zombori","sequence":"additional","affiliation":[{"name":"Department of Pathology, CSMEKHM Health Care Center, 6800 H\u00f3dmez\u0151v\u00e1s\u00e1rhely, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5548-6026","authenticated-orcid":false,"given":"Gabriella","family":"Pankotai-Bod\u00f3","sequence":"additional","affiliation":[{"name":"Department of Pathology, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S\u00e1ndor","family":"Turkevi-Nagy","sequence":"additional","affiliation":[{"name":"Department of Pathology, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4546-6253","authenticated-orcid":false,"given":"B\u00e9la","family":"Iv\u00e1nyi","sequence":"additional","affiliation":[{"name":"Department of Pathology, Albert Szent-Gy\u00f6rgyi Medical Center, Faculty of Medicine, University of Szeged, 6720 Szeged, Hungary"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"910","DOI":"10.1038\/ng.2347","article-title":"FAN1 mutations cause karyomegalic interstitial nephritis, linking chronic kidney failure to defective DNA damage repair","volume":"44","author":"Zhou","year":"2012","journal-title":"Nat. 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