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Institute of Metabolic Science

Metabolic Research Laboratories
 

Research focus

The overall aim of my research is to use single-nucleus sequencing and other molecular techniques to map the human hypothalamic functional architecture underlying appetitive control. 

Background and experience

I completed my BSc in biological sciences with minors in genetics and biotechnology at North Carolina State University. I studied an obesity risk variant at the FAIM2 locus for my PhD in the Department of Genetics at the University of Pennsylvania’s Perelman School of Medicine. I’ve joined the IMS-MRL for postdoctoral training to expand my skillset and learn more about the genetics of obesity.  

Working at the IMS-MRL

My current project involves using frozen human brain samples from donors with extreme bodyweights which are provided from the Cambridge Brain Bank. These samples will be used to transcriptionally profile hypothalamic cells using single-nucleus RNA-seq and map hypothalamic neural feeding circuitry using spatial transcriptomics. Together, these efforts will increase our understanding of the circuitry controlling food intake and modifying body weight in humans.

Awards 

Recipient of a F31 Ruth L. Kirschstein Predoctoral Individual National Research Service Award from the National Institute of Child Health and Human Development 2022-2023 

Publications

Key publications: 

Littleton, S.H., Grant, S.F.A. Strategies to identify causal common genetic variants and corresponding effector genes for pediatric obesity. Pediatric Obesity 17, e12968 [2022 August 16]. doi: 10.1111/ijpo.12968. PMID: 35971868 

Pahl*, M.C., Doege*, C.A., Hodge*, K.M., Littleton*, S.H. et. al. Cis-regulatory architecture of human ESC-derived hypothalamic neuron differentiation aids in variant-to-gene mapping of relevant complex traits. Nature Communications 12, 6749 [2021 November 19]. doi: 10.1038/s41467-021-27001-4. PMID: 34799566 *equal contribution 

Littleton, S.H., Berkowitz, R.I., Grant, S.F.A. Genetic determinants of childhood obesity. Molecular Diagnosis & Therapy 24, 653–663 [2020 October 1]. doi: 10.1007/s40291-020-00496-1. PMID: 33006084 

Research Associate
Yeo Group

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