Florida State University
Dr. Timothy Megraw is currently accepting new graduate students.

Dr. Timothy Megraw

Associate Professor of Biomedical Sciences & Neuroscience

Biomedical Sciences
MSR 3300


The Megraw lab investigates the functions of centrosomes and cilia in cell division, development and disease using Drosophila, mouse, and human cell culture models. This includes asymmetric division of stem cells, the regulation of centrosomal and other microtubule-organizing centers (MTOCs), metabolic disorders due to loss of centrosome proteins, and regulation of primary cilium assembly and function. Centrosome-based disorders that impact stem cell function and brain development are a major focus of our research.
Current Research
The centrosome is the major microtubule-organizing center (MTOC) in animal cells and impacts many disease-related functions. We focus on the links between centrosome functions and inherited forms of microcephaly that arise from syndromes such as MCPH or SCKL. Our investigations show cell division-related defects in stem cells arising from impaired centrosome replication, but there are also specific metabolic impairments in cells mutant for centrosome protein genes. We suspect that Zika virus perturbs the same centrosome-related pathways in human neural stem cells, causing microcephaly in infected mothers during their pregnancy. We are investigating the links between Zika virus infection and centrosome impairment, to connect the inherited and viral-induced forms of microcephaly.
Recent Publications
Blake-Hedges C, Megraw TL (2019). Coordination of Embryogenesis by the Centrosome in Drosophila melanogaster. Results Probl Cell Differ, 277-321. PubMed
Ghoveud E, Teimuri S, Vatandoost J, Hosseini A, Ghaedi K, Etemadifar M, Nasr Esfahani MH, Megraw TL (2019). Potential Biomarker and Therapeutic LncRNAs in Multiple Sclerosis Through Targeting Memory B Cells. Neuromolecular Med, 22(1):111-120. PubMed
Hosseini A, Teimuri S, Ehsani M, Rasa SMM, Etemadifar M, Nasr Esfahani MH, Megraw TL, Ghaedi K (2019). LncRNAs associated with multiple sclerosis expressed in the Th1 cell lineage. J Cell Physiol, 234(12):22153-22162. PubMed
Zhou T, Zheng Y, Sun L, Badea SR, Jin Y, Liu Y, Rolfe AJ, Sun H, Wang X, Cheng Z, Huang Z, Zhao N, Sun X, Li J, Fan J, Lee C, Megraw TL, Wu W, Wang G, Ren Y (2019). Microvascular endothelial cells engulf myelin debris and promote macrophage recruitment and fibrosis after neural injury. Nat Neurosci, 22(3):421-435. PubMed
Teimuri S, Hosseini A, Rezaenasab A, Ghaedi K, Ghoveud E, Etemadifar M, Nasr-Esfahani MH, Megraw TL (2018). Integrative Analysis of lncRNAs in Th17 Cell Lineage to Discover New Potential Biomarkers and Therapeutic Targets in Autoimmune Diseases. Mol Ther Nucleic Acids, 393-404. PubMed
Tillery MML, Blake-Hedges C, Zheng Y, Buchwalter RA, Megraw TL (2018). Centrosomal and Non-Centrosomal Microtubule-Organizing Centers (MTOCs) in Drosophila melanogaster. Cells, 7(9):121. PubMed
Chen JV, Buchwalter RA, Kao LR, Megraw TL (2017). A splice variant of centrosomin converts mitochondria to microtubule- organizing centers. Curr Biol, 27(13):1928-1940. PubMed
Manojlovic Z, Earwood R, Kato A, Perez D, Cabrera OA, Didier R, Megraw TL, Stefanovic B, Kato Y (2017). La-related protein 6 controls ciliated cell differentiation . Cilia, 6:4. PubMed
Debec A, Megraw TL, Guichet A (2016). Methods to establish drosophila cell lines. Methods Mol Biol, 333-351. PubMed
Guarderas F, Leavell Y, Sengupta T, Zhukova M, Megraw TL (2016). Assessment of Chicken-Egg Membrane as a Dressing for Wound Healing. Adv Skin Wound Care, 29(3):131-4. PubMed
Jana SC, Bettencourt-Dias M, Durand B, Megraw TL. (2016). Drosophila melanogaster as a model for basal body research.. Cilia, 5:22. PubMed
Jodeiri Farshbaf M, Ghaedi K, Megraw TL, Curtiss J, Shirani Faradonbeh M, Vaziri P, Nasr-Esfahani MH (2016). Does PGC1alpha/FNDC5/BDNF Elicit the Beneficial Effects of Exercise on Neurodegenerative Disorders?. Neuromolecular Med, 18(1):1-15. PubMed
Zheng Y, Mennella V, Marks S, Wildonger J, Elnagdi E, Agard D, Megraw TL (2016). The Seckel syndrome and centrosomal protein Ninein localizes asymmetrically to stem cell centrosomes but is not required for normal development, behavior, or DNA damage response in Drosophila.. Mol Biol Cell, 27(11):1740-52. PubMed
Bingol K, Li DW, Bruschweiler-Li L, Cabrera OA, Megraw T, Zhang F, Brüschweiler R (2015). Unified and isomer-specific NMR metabolomics database for the accurate analysis of (13)C-(1)H HSQC spectra. ACS Chem Biol, 10(2):452-9. PubMed
Chen JV, Kao LR, Jana SC, Sivan-Loukianova E, Mendonça S, Cabrera OA, Singh P, Cabernard C, Eberl DF, Bettencourt-Dias M, Megraw TL (2015). Rootletin organizes the ciliary rootlet to achieve neuron sensory function in Drosophila. J Cell Biol, 211(2):435-53. PubMed
Man X, Megraw TL, Lim YP (2015). Cep68 can be regulated by Nek2 and SCF complex. Eur J Cell Biol, 94(3-4):162-72. PubMed
Tözser J, Earwood R, Kato A, Brown J, Tanaka K, Didier R, Megraw TL, Blum M, Kato Y (2015). TGF-beta Signaling Regulates the Differentiation of Motile Cilia. Cell Rep, 11(7):1000-7. PubMed

All Publications PubMed

Lab Website

Neuro Grads and Postdocs

Caitlyn Blake-Hedges, Graduate Student - Biomedical sciences

Rebecca Buchwalter, Graduate Student - Biomedical sciences

Ling-Rong Kao, Affiliate - Biomedical sciences

Marisa Tillery, Graduate Student - Biomedical sciences

Elise Wight, Graduate Student - Biomedical sciences

Chunfeng Zheng, Lab Tech

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