Dr. Robert Hufnagel is a physician-scientist who joined the Center for Integrated Healthcare Research in 2023. After receiving his M.D. and Ph.D. from the University of Cincinnati (Cincinnati, Ohio), he completed his Pediatrics and Clinical Genetics residency at Cincinnati Children’s Hospital, followed by fellowships in Clinical Ophthalmic Genetics at the National Eye Institute (NEI/NIH) and Clinical Molecular Genetics and Genomics at the National Human Genome Research Institute (NHGRI/NIH).
His research is dedicated to improving utilization of genomic data in medicine at point-of-care. Research focuses include the role of genome sequencing for rare and common diseases, models for variant classification of pathogenicity, and genotype-first approaches to diagnosis and management. These projects combine clinical data, biostatistics, and high-throughput sequencing analysis to establish patient-centered disease models for translational and preclinical studies.
Dr. Hufnagel also serves in leadership roles in several clinical and research organizations, including the American College of Medical Genetics and Genomics (ACMG), the Clinical Genome Resource (ClinGen), the Association for Research in Vision and Ophthalmology (ARVO), and the Foundation Fighting Blindness (FFB).
Professional Activities:
- American College of Medical Genetics and Genomics, Board of Directors - Director, Molecular Genetics
- ClinGen - Clinical Genome Resource, Clinical Domain Working Group Membership Chair
- Foundation Fighting Blindness, Scientific Advisory Board
- Ophthalmic Genetics, Editorial Board
Selected Publications:
- Neuropathy target esterase activity defines phenotypes among PNPLA6 disorders. Liu J, He Y, Lwin C, Han M, Guan B, Naik A, Bender C, Moore N, Huryn LA, Sergeev YV, Qian H, Zeng Y, Dong L, Liu P, Lei J, Haugen CJ, Prasov L, Shi R, Dollfus H, Aristodemou P, Laich Y, Németh AH, Taylor J, Downes S, Krawczynski MR, Meunier I, Strassberg M, Tenney J, Gao J, Shear MA, Moore AT, Duncan JL, Menendez B, Hull S, Vincent AL, Siskind CE, Traboulsi EI, Blackstone C, Sisk RA, Miraldi Utz V, Webster AR, Michaelides M, Arno G, Synofzik M, Hufnagel RB. Brain. 2024 May 13:awae055. doi: 10.1093/brain/awae055. Online ahead of print. PMID: 38735647
- High Clinical Exome Sequencing Diagnostic Rates and Novel Phenotypic Expansions for Nonisolated Microphthalmia, Anophthalmia, and Coloboma. Kunisetty B, Martin-Giacalone BA, Zhao X, Luna PN, Brooks BP, Hufnagel RB, Shaw CA, Rosenfeld JA, Agopian AJ, Lupo PJ, Scott DA. Invest Ophthalmol Vis Sci. 2024 Mar 5;65(3):25. doi: 10.1167/iovs.65.3.25. PMID: 38502138 Free PMC article.
- The qMini assay identifies an overlooked class of splice variants. Guan B, Bender C, Pantrangi M, Moore N, Reeves M, Naik A, Li H, Goetz K, Blain D, Agather A, Cukras C, Zein WM, Huryn LA, Brooks BP, Hufnagel RB. medRxiv [Preprint]. 2023 Nov 3:2023.11.02.23297963. doi: 10.1101/2023.11.02.23297963. PMID: 38076877 Free PMC article. Preprint.
- PNPLA6 disorders: what's in a name? Liu J, Hufnagel RB. Ophthalmic Genet. 2023 Dec;44(6):530-538. doi: 10.1080/13816810.2023.2254830. Epub 2023 Nov 20. PMID: 37732399 Review.
- Investigating Determinants and Evaluating Deep Learning Training Approaches for Visual Acuity in Foveal Hypoplasia. Malechka VV, Duong D, Bordonada KD, Turriff A, Blain D, Murphy E, Introne WJ, Gochuico BR, Adams DR, Zein WM, Brooks BP, Huryn LA, Solomon BD, Hufnagel RB. Ophthalmol Sci. 2022 Sep 24;3(1):100225. doi: 10.1016/j.xops.2022.100225. eCollection 2023 Mar. PMID: 36339947 Free PMC article.
- Early-Onset TIMP3-Related Retinopathy Associated With Impaired Signal Peptide. Guan B, Huryn LA, Hughes AB, Li Z, Bender C, Blain D, Turriff A, Cukras CA, Hufnagel RB. JAMA Ophthalmol. 2022 Jul 1;140(7):730-733. doi: 10.1001/jamaophthalmol.2022.1822. PMID: 35679059 Free PMC article.
- Predominant Founder Effect among Recurrent Pathogenic Variants for an X-Linked Disorder. Bender C, Woo EG, Guan B, Ullah E, Feng E, Turriff A, Tumminia SJ, Sieving PA, Cukras CA, Hufnagel RB. Genes (Basel). 2022 Apr 12;13(4):675. doi: 10.3390/genes13040675. PMID: 35456481 Free PMC article.
- Tissue-specific genotype-phenotype correlations among USH2A-related disorders in the RUSH2A study.Hufnagel RB, Liang W, Duncan JL, Brewer CC, Audo I, Ayala AR, Branham K, Cheetham JK, Daiger SP, Durham TA, Guan B, Heon E, Hoyng CB, Iannaccone A, Kay CN, Michaelides M, Pennesi ME, Singh MS, Ullah E; Foundation Fighting Blindness Consortium Investigator Group. Hum Mutat. 2022 May;43(5):613-624. doi: 10.1002/humu.24365. Epub 2022 Mar 21. PMID: 35266249 Free PMC article.
- Review of evidence for environmental causes of uveal coloboma. Selzer EB, Blain D, Hufnagel RB, Lupo PJ, Mitchell LE, Brooks BP. Surv Ophthalmol. 2022 Jul-Aug;67(4):1031-1047. doi: 10.1016/j.survophthal.2021.12.008. Epub 2021 Dec 31. PMID: 34979194 Free PMC article. Review.
- Building the mega single-cell transcriptome ocular meta-atlas. Swamy VS, Fufa TD, Hufnagel RB, McGaughey DM. Gigascience. 2021 Oct 13;10(10):giab061. doi: 10.1093/gigascience/giab061. PMID: 34651173 Free PMC article.
- Sensitive extraction-free SARS-CoV-2 RNA virus detection using a chelating resin. Guan B, Frank KM, Maldonado JO, Beach M, Pelayo E, Warner BM, Hufnagel RB. iScience. 2021 Sep 24;24(9):102960. doi: 10.1016/j.isci.2021.102960. Epub 2021 Aug 9. PMID: 34396082 Free PMC article.
- Clinical and Histopathologic Correlates of Asymmetric Retinitis Pigmentosa. Lal T, Yu ZX, Guan B, Bender C, Chan CC, Cukras CA, Hufnagel RB. JAMA Ophthalmol. 2021 Sep 1;139(9):1029-1032. doi: 10.1001/jamaophthalmol.2021.2688. PMID: 34351381 Free PMC article.
- PNPLA6 Disorders. Synofzik M, Hufnagel RB, Züchner S. 2014 Oct 9 [updated 2021 Jun 10]. In: Adam MP, Feldman J, Mirzaa GM, Pagon RA, Wallace SE, Bean LJH, Gripp KW, Amemiya A, editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993–2024. PMID: 25299038 Free Books & Documents. Review.
- UBA2 variants underlie a recognizable syndrome with variable aplasia cutis congenita and ectrodactyly. Schnur RE, Yousaf S, Liu J, Chung WK, Rhodes L, Marble M, Zambrano RM, Sobreira N, Jayakar P, Pierpont ME, Schultz MJ, Pichurin PN, Olson RJ, Graham GE, Osmond M, Contreras-García GA, Campo-Neira KA, Peñaloza-Mantilla CA, Flage M, Kuppa S, Navarro K, Sacoto MJG, Wentzensen IM, Scarano MI, Juusola J, Prada CE, Hufnagel RB. Genet Med. 2021 Sep;23(9):1624-1635. doi: 10.1038/s41436-021-01182-1. Epub 2021 May 26. PMID: 34040189 Free PMC article.
- Phenotypic and Genetic Spectrum of Autosomal Recessive Bestrophinopathy and Best Vitelliform Macular Dystrophy. Pfister TA, Zein WM, Cukras CA, Sen HN, Maldonado RS, Huryn LA, Hufnagel RB. Invest Ophthalmol Vis Sci. 2021 May 3;62(6):22. doi: 10.1167/iovs.62.6.22. PMID: 34015078 Free PMC article.
- A Comprehensive Assessment of Co-occurring Birth Defects among Infants with Non-Syndromic Anophthalmia or Microphthalmia. Schraw JM, Benjamin RH, Scott DA, Brooks BP, Hufnagel RB, McLean SD, Northrup H, Langlois PH, Canfield MA, Scheuerle AE, Schaaf CP, Ray JW, Chen H, Swartz MD, Mitchell LE, Agopian AJ, Lupo PJ. Ophthalmic Epidemiol. 2021 Oct;28(5):428-435. doi: 10.1080/09286586.2020.1862244. Epub 2020 Dec 20. PMID: 33345678 Free PMC article.
- An international telemedicine program for diagnosis of genetic disorders: Partnership of pediatrician and geneticist. Mena R, Mendoza E, Gomez Peña M, Valencia CA, Ullah E, Hufnagel RB, Prada CE. Am J Med Genet C Semin Med Genet. 2020 Dec;184(4):996-1008. doi: 10.1002/ajmg.c.31859. Epub 2020 Nov 21. PMID: 33219631 Free PMC article.
- Novel TMEM98, MFRP, PRSS56 variants in a large United States high hyperopia and nanophthalmos cohort. Prasov L, Guan B, Ullah E, Archer SM, Ayres BM, Besirli CG, Wiinikka-Buesser L, Comer GM, Del Monte MA, Elner SG, Garnai SJ, Huryn LA, Johnson K, Kamat SS, Lieu P, Mian SI, Rygiel CA, Serpen JY, Pawar HS, Brooks BP, Moroi SE, Richards JE, Hufnagel RB. Sci Rep. 2020 Nov 17;10(1):19986. doi: 10.1038/s41598-020-76725-8. PMID: 33203948 Free PMC article.
- Phenotype and Genotype Correlations in Inherited Retinal Diseases: Population-Guided Variant Interpretation, Variable Expressivity and Incomplete Penetrance. Ellingford JM, Hufnagel RB, Arno G. Genes (Basel). 2020 Oct 29;11(11):1274. doi: 10.3390/genes11111274. PMID: 33137882 Free PMC article.
- Ocular genetics in the genomics age. Walter MA, Rezaie T, Hufnagel RB, Arno G. Am J Med Genet C Semin Med Genet. 2020 Sep;184(3):860-868. doi: 10.1002/ajmg.c.31844. Epub 2020 Sep 8. PMID: 32896097 Free PMC article. Review.
- Genetic testing for inherited eye conditions in over 6,000 individuals through the eyeGENE network. Goetz KE, Reeves MJ, Gagadam S, Blain D, Bender C, Lwin C, Naik A, Tumminia SJ, Hufnagel RB. Am J Med Genet C Semin Med Genet. 2020 Sep;184(3):828-837. doi: 10.1002/ajmg.c.31843. Epub 2020 Sep 7. PMID: 32893963 Free PMC article.
- The peroxisomal disorder spectrum and Heimler syndrome: Deep phenotyping and review of the literature. Daich Varela M, Jani P, Zein WM, D'Souza P, Wolfe L, Chisholm J, Zalewski C, Adams D, Warner BM, Huryn LA, Hufnagel RB. Am J Med Genet C Semin Med Genet. 2020 Sep;184(3):618-630. doi: 10.1002/ajmg.c.31823. Epub 2020 Aug 31. PMID: 32866347 Free PMC article.
- Ophthalmic genetics in South America. Daich Varela M, Moya R, Schlottmann PG, Hufnagel RB, Arberas C, Fernández FM, Inga ME, Lores J, Pachajoa H, Prada CE, Sallum JMF. Am J Med Genet C Semin Med Genet. 2020 Sep;184(3):753-761. doi: 10.1002/ajmg.c.31832. Epub 2020 Aug 28. PMID: 32856789 Free PMC article.
- Genotype-phenotype associations in a large PRPH2-related retinopathy cohort. Reeves MJ, Goetz KE, Guan B, Ullah E, Blain D, Zein WM, Tumminia SJ, Hufnagel RB. Hum Mutat. 2020 Sep;41(9):1528-1539. doi: 10.1002/humu.24065. Epub 2020 Jul 5. PMID: 32531846 Free PMC article.
- A genetic and clinical study of individuals with nonsyndromic retinopathy consequent upon sequence variants in HGSNAT, the gene associated with Sanfilippo C mucopolysaccharidosis. Schiff ER, Daich Varela M, Robson AG, Pierpoint K, Ba-Abbad R, Nutan S, Zein WM, Ullah E, Huryn LA, Tuupanen S, Mahroo OA, Michaelides M, Burke D, Harvey K, Arno G, Hufnagel RB, Webster AR. Am J Med Genet C Semin Med Genet. 2020 Sep;184(3):631-643. doi: 10.1002/ajmg.c.31822. Epub 2020 Aug 7. PMID: 32770643 Free PMC article.
- Disruptive variants of CSDE1 associate with autism and interfere with neuronal development and synaptic transmission. Guo H, Li Y, Shen L, Wang T, Jia X, Liu L, Xu T, Ou M, Hoekzema K, Wu H, Gillentine MA, Liu C, Ni H, Peng P, Zhao R, Zhang Y, Phornphutkul C, Stegmann APA, Prada CE, Hopkin RJ, Shieh JT, McWalter K, Monaghan KG, van Hasselt PM, van Gassen K, Bai T, Long M, Han L, Quan Y, Chen M, Zhang Y, Li K, Zhang Q, Tan J, Zhu T, Liu Y, Pang N, Peng J, Scott DA, Lalani SR, Azamian M, Mancini GMS, Adams DJ, Kvarnung M, Lindstrand A, Nordgren A, Pevsner J, Osei-Owusu IA, Romano C, Calabrese G, Galesi O, Gecz J, Haan E, Ranells J, Racobaldo M, Nordenskjold M, Madan-Khetarpal S, Sebastian J, Ball S, Zou X, Zhao J, Hu Z, Xia F, Liu P, Rosenfeld JA, de Vries BBA, Bernier RA, Xu ZD, Li H, Xie W, Hufnagel RB, Eichler EE, Xia K. Sci Adv. 2019 Sep 25;5(9):eaax2166. doi: 10.1126/sciadv.aax2166. eCollection 2019 Sep. PMID: 31579823 Free PMC article.
Full List of Publications:
Studies:
- CLINICAL UTILITY OF GENOTYPING ARRAY TO DEFINE ACTIONABLE GENETIC DISEASE BURDEN IN KP RESEARCH BANK
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The KP Research Bank aims to understand the frequency of actionable and incidental genomic results in KPRB participants in regard to clinical sensitivity and specificity of the genotyping array and estimate genetic risk burden in the KPRB genotyping project.
Sponsor: Kaiser Community Benefit
KPHI Principal Investigator: Robert Hufnagel, MD, PhD, FACMG
- MICROPHTHALMIA, ANOPHTHALMIA, AND COLOBOMA GENETIC EPIDEMIOLOGY IN CHILDREN (MAGIC) STUDY
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Congenital defects of the eye occur in approximately 5 per 10,000 live births. While there is a paucity of epidemiologic information about these conditions, there is a growing awareness of the long-term complications among children with these malformations. Among the more common visually threatening congenital eye defects are anophthalmia (total absence of the globe); microphthalmia (anomalously small eye in the orbit); and coloboma (failure of the closure of the fetal fissure). Collectively, these defects are referred to as MAC complex and are considered part of an embryologic continuum of ocular malformations. This study will be the first to comprehensively characterize the genotypic and phenotypic spectrum on a population-based sample of children living with MAC.
NIH Reporter: https://reporter.nih.gov/search/vnfs0BFKd06gunYgDeLohg/project-details/10157486Sponsor: NIH / NEI
KPHI Principal Investigator: Robert Hufnagel, MD, PhD, FACMG