Hans Björnsson

Assistant Professor, McKusick-Nathans Institute of Genetic Medicine

Contact Information

733 N Broadway, BRB435

Johns Hopkins University, School of Medicine.  Baltimore, MD 21205

Phone: (410) 502-0056

Fax: (410) 614-9246

Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Website:

Research Interests

Epigenetic modifications offer one plausible way that the environment (both external and internal) can directly affect gene expression. Epigenetic modifications have also been known to minimize disease states by buffering the impact of genetic variants (i.e. Agouti viable yellow mouse model). Our laboratory is interested in developing epigenetic treatment strategies to minimize disease mortality and morbidity caused by genetic mutations. We feel that a logical first place to test epigenetic therapeutic strategies is to develop therapies for specific Mendelian disorders of the epigenetic machinery. Dr. Bjornsson has recently initiated a clinic that focuses on caring for patients with epigenetic disorders, including the imprinting disorders and Mendelian disorders of the epigenetic machinery. In addition to learning from the patients we care for and working towards therapies for these patients we hope to learn some fundamental truths about epigenetics.

We are interested in:

1.  Exploring the epigenomic impact of various Mendelian disorders of the epigenetic machinery;

2.  Epigenetic therapeutic development with focus on developing therapies for disorders of the histone machinery and imprinting disorders;

3. Exploring the usefulness of the epigenomic biomarker to monitor disease states or treatment effects

Selected Publications

Sigurdsson MI, Smith AV, Bjornsson HT, Jonsson JJ. The distribution of a germline methylation marker suggests a regional mechanism of LINE-1 silencing by the piRNA-PIWI system. BMC Genet. 2012 Apr 24;13:31.  PMC:3352111

Sigurdsson MI, Smith AV, Bjornsson HT, Jonsson JJ. HapMap methylation-associated SNPs, markers of germline DNA methylation, positively correlate with regional levels of human meiotic recombination. Genome Res. 2009 Apr;19(4):581-9.  PMID:19158364

Bjornsson HT, Sigurdsson MI, Fallin MD, Irizarry RA, Aspelund T, Cui H, Yu W, Rongione MA, Ekström TJ, Harris TB, Launer LJ, Eiriksdottir G, Leppert MF, Sapienza C, Gudnason V, Feinberg AP. Intra-individual change over time in DNA methylation with familial clustering. JAMA. 2008 Jun 25;299(24):2877-83.  PMID: 18577732

Bjornsson HT, Albert TJ, Ladd-Acosta CM, Green RD, Rongione MA, Middle CM, Irizarry RA, Broman KW, Feinberg AP. SNP-specific array-based allele-specific expression analysis. Genome Res. 2008 May;18(5):771-9.  PMID: 18369178

Bjornsson HT, Brown LJ, Fallin MD, Rongione MA, Bibikova M, Wickham E, Fan JB, Feinberg AP. Epigenetic specificity of loss of imprinting of the IGF2 gene in Wilms tumors. J Natl Cancer Inst. 2007 Aug 15;99(16):1270-3.  PMID:17686827

Bjornsson HT, Fallin MD, Feinberg AP. An integrated epigenetic and genetic approach to common human disease. Trends Genet. 2004 Aug;20(8):350-8.  PMID: 15262407

 
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