Ahmed Mahmoud

Address: 4557 WIMR II – 1111 Highland Ave Madison, WI 53705

Visit the Mahmoud Lab Website

Position Open for Postdoctoral Researcher

PubMed

Education

Ph.D., Univ. of Texas Southwestern Medical Center at Dallas
Postdoctoral Research: Stem Cell and Regenerative Biology, Harvard University

Research

Heart failure is the leading cause of death in the world due to the inability of the adult mammalian heart to regenerate following injury. Lower vertebrates, such as zebrafish are capable of complete and efficient regeneration of the myocardium following injury. Similarly, we demonstrated that neonatal mice are capable of regenerating their hearts within a short period after birth but lose this potential in the first week of life. Adult mammals lack this cardiac regeneration potential, thus our overarching goal in the laboratory is to dissect the molecular underpinnings of regeneration in the neonatal heart so that we can explore potential avenues to activate this process in adult humans.

Our goals are to identify the transcriptional and epigenetic networks that govern cardiomyocyte dedifferentiation and proliferation during regeneration. These studies could aid in converting adult cardiomyocytes to a more proliferative and regenerative state. In addition, we aim to identify the microenvironment signals that regulate mammalian heart regeneration by studying the interplay of nerves as well as extracellular factors during mammalian heart regeneration. We use multidisciplinary approaches including genomics, proteomics, and mouse genetics in addition to molecular and cellular technologies to address these questions.

Representative Publications

• Aballo, T.J., Bae, J., Paltzer, W.G., Chapman, E.A., Salamon, R.J., Mann, M.M., Ge, Y.*, Mahmoud, A.I.*. Integrated Proteomics Identifies Troponin I Isoform Switch as a Regulator of a Sarcomere-Metabolism Axis During Cardiac Regeneration. bioRxiv, 2023 Oct 23. (*co-corresponding authors).
• Mahmoud, A.I.*. Metabolic switches during development and regeneration. Development, 2023 Oct 15;150(20):dev202008. (*corresponding author)
• Paltzer, W.G., Aballo, T.J., Bae, J., Hubert, K.A., Nuttall, D.J., Perry, C., Wanless, K.N., Nahlawi, R., Ge, Y., Mahmoud, A.I.*. mTORC1 Regulates the Metabolic Switch of Postnatal Cardiomyocytes During Regeneration. bioRxiv, 2023 Sep 13. (*corresponding author).
• Salamon, R.J., Halbe, P., Kasberg, W., Bae, J., Audhya, A., Mahmoud, A.I.*. Parasympathetic and sympathetic axons are bundled in the cardiac ventricles and undergo physiological reinnervation during heart regeneration. iScience, 2023 Aug 25;26(10):107709. (*corresponding author
• Salamon, R.J., McKeon, M.C., Bae, J., Zhang, X., Paltzer, W.G., Wanless, K.N., Schuett, A.R., Nuttall, D.J., Nemr, S.A., Sridharan, R., Lee, Y., Kamp, T.J., Mahmoud, A.I.*. LRRC10 regulates mammalian cardiomyocyte cell cycle during heart regeneration. NPJ Regenerative Medicine, 2023 Jul 28;8(1):39. (*corresponding author).
• Aballo, T.J., Roberts, D.S., Bayne, E.F., Zhu, W., Walcott, G., Mahmoud, A.I., Zhang, J., Ge, Y. Integrated proteomics reveals alterations in sarcomere composition and developmental processes during postnatal swine heart development. Journal of Molecular and Cellular Cardiology, 2023 Mar; 176:33-40.
• Brandt E.B., Mahmoud A.I.* (2022) Quantifying CardiomyocyteProliferation and Nucleation to Assess Mammalian Cardiac Regeneration. Methods in Molecular Biology, 2022;2485:243-253. (*corresponding author).
• Salamon, R.J., Mahmoud, A.I.*. Bridging the communication gap: cardiomyocytes reciprocate sympathetic nerve signalling. Journal of Physiology, 2022 May 25. (*corresponding author).
• Bae, J., Paltzer, W.G., Mahmoud, A.I.*. The role of metabolism in heart failure and regeneration. Frontiers in Cardiovascular Medicine, 2021 Jul 16;8:702920. (*corresponding author).
• Tampakakis, E.*, Mahmoud, A.I.*. The role of hormones and neurons in cardiomyocyte maturation. Seminars in Cell & Developmental Biology, 2021 Oct;118:136-143. (*co-corresponding authors).
• Bae, J., Salamon, R.J., Brandt, E.B., Paltzer, W.G., Zhang, Z., Britt, E.C., Hacker, T.A., Fan, J., Mahmoud, A.I.*. Malonate Promotes Adult Cardiomyocyte Proliferation and Heart Regeneration. Circulation, 2021 May 18;143(20):1973-1986. (*corresponding author)
• Salamon, R.J., Zhang, Z., Mahmoud, A.I.*. Capturing the Cardiac Injury Response of Targeted Cell Populations via Cleared Heart Three-Dimensional Imaging. Journal of Visualized Experiments, 2020 Mar 17; (157). (*corresponding author).
• Brandt, E.B., Bashar, S.J., Mahmoud, A.I.*. Stimulating ideas for heart regeneration: the future of nerve-directed heart therapy. Bioelectronic Medicine, 2019 Jun 26; 5:8. (*corresponding author).
• Mahmoud, A.I.* and Porrello, E.R*. Upsizing Neonatal Heart Regeneration. Circulation, 2018 Dec 11;138(24):2817-2819. (*co-corresponding authors).
• Mahmoud, A.I., O’Meara, C.C., Gemberling, M., Zhao, L., Bryant, D.M., Zheng, R., Gannon, J.B., Cai, L., Choi, W., Egnaczyk, G.F., Burns, C.E., Burns, C.G., MacRae, C.A., Poss, K.D., Lee, R.T. Nerves regulate cardiomyocyte proliferation and heart regeneration. Developmental Cell, 2015 Aug 24;34(1):1-13.

• Mahmoud, A.I., Porrello, E.R., Kimura, W., Olson. E.N., Sadek, H.A. Surgical models for cardiac regeneration in neonatal mice. Nature Protocols, 2014 Feb;9(2):305-11.

• Mahmoud, A.I., Kocabas, F., Muralidhar, S.A., Kimura, W., Koura, A.S., Thet, S., Porrello, E.R., Sadek, H.A. Meis1 regulates postnatal cardiomyocyte cell cycle arrest. Nature, 2013 May 9;497(7448):249-53.

• Porrello, E.R., Mahmoud, A.I., Simpson, E., Johnson, B.A., Grinsfelder, D., Canseco, D., Mammen, P.P, Rothermel, B.A., Olson, E.N., Sadek, H.A. Regulation of neonatal and adult mammalian heart regeneration by the miR-15 family. Proc. Natl. Acad. Sci., U.S.A, 2013 Jan 2;110(1):187-92.

• Porrello, E.R.,Mahmoud, A.I., Simpson, E., Hill, J.A., Richardson, J.A., Olson, E.N., Sadek, H.A. Transient regenerative potential of the neonatal mouse heart. Science, 2011 Feb 25;331(6020):1078-80.