{"id":4621,"date":"2022-03-24T12:24:15","date_gmt":"2022-03-24T19:24:15","guid":{"rendered":"https:\/\/keck.usc.edu\/news\/stem-cell-scientists-explore-the-mysteries-of-regeneration-at-the-junior-faculty-candidate-seminar-and-symposium\/"},"modified":"2023-11-26T08:39:05","modified_gmt":"2023-11-26T16:39:05","slug":"stem-cell-scientists-explore-the-mysteries-of-regeneration-at-the-junior-faculty-candidate-seminar-and-symposium","status":"publish","type":"post","link":"https:\/\/keck.usc.edu\/news\/stem-cell-scientists-explore-the-mysteries-of-regeneration-at-the-junior-faculty-candidate-seminar-and-symposium\/","title":{"rendered":"Stem cell scientists explore the mysteries of regeneration at the Junior Faculty Candidate Seminar and Symposium"},"content":{"rendered":"\n \n \n\n\n\n\n\n\n\n
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Stem cell scientists explore the mysteries of regeneration at the Junior Faculty Candidate Seminar and Symposium<\/h1>\n\n\n<\/div>\n \n \n
\n \n March 24, 2022<\/span>\n <\/div>\n \n \n
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How can we regenerate tissues that are damaged, lost or diseased in the human body? This was the central question driving the four scientists who presented their research at the Junior Faculty Candidate Seminar and Symposium, hosted by USC\u2019s Department of Stem Cell Biology and Regenerative Medicine.<\/p>\n

At a February 10 seminar,\u00a0Kyle McCracken, MD, PhD<\/a>, from Boston Children\u2019s Hospital and Brigham and Women\u2019s Hospital, shared progress in regenerating one of the least regenerative organs in the body: the kidney. McCracken described how he directed human stem cells to form kidney-like structures known as organoids.<\/p>\n

\u201cIn my first year as a medical student, learning about renal physiology was really my inspiration for wanting to do nephrology. It\u2019s so complicated and so amazing, and it makes so much sense that I never could stop thinking about it,\u201d he said.<\/p>\n

By relying on the body\u2019s natural developmental signals, McCracken successfully grew organoids that resembled the collecting duct that helps maintain the body\u2019s fluid and pH balance, and concentrates and transports urine. Strikingly, the organoids showed the kidney\u2019s branching architecture. Some of the cells even acquired basic functions, such as transporting salt and creating pH gradients.<\/p>\n

\u201cThe ability to differentiate good kidney tissues from stem cells is going to open up a huge amount of opportunity, scientifically and translationally, in the field of nephrology,\u201d said McCracken.<\/p>\n

Organoids serve as models of development and disease, platforms for screening drugs to treat kidney disease, and a first step towards generating functional replacement tissues for patients.<\/p>\n

At the March 8 symposium, three scientists provided new insights into their research on heart regeneration, hair follicle stimulation, and developmental pathways that drive limb regeneration in amphibians.<\/p>\n

Miao Cui, PhD<\/a>, from the University of Texas Southwestern Medical Center discussed how newborn mice regenerate their hearts after severe injuries, such as heart attacks. This remarkable regenerative ability is lost one week after birth, which is part of the reason why heart disease is the leading cause of death in the United States.<\/p>\n

\u201cWe think that, with regenerative medicine , , we can find mechanisms that can fully repair and regenerate\u00a0\u00a0 \u00a0the lost or damaged tissue,\u201d said Cui, \u201cand it would be the most effective way to treat heart disease.\u201d<\/p>\n

With this goal in mind, Cui has undertaken a detailed study of the molecular and cellular factors that contribute to the newborn mouse\u2019s ability to regenerate its heart. Near the site of heart injury, she has identified a highly regenerative population of heart muscle cells, with embryo-like gene activity that enables survival and proliferation in stressful, low-oxygen conditions. She has also observed that newborn mouse hearts have a very limited post-injury inflammatory response.<\/p>\n

\u201cIn my future research, I\u2019d like to use several genomics and systems biology tools to study the developmental signals and injury-induced responses that allow the neonatal heart to regenerate,\u201d she said.<\/p>\n

Yulia Shwartz, PhD<\/a>, from Harvard University examined how environmental changes\u2014such as cold temperatures\u2014can affect stem cells in the skin.<\/p>\n

\u201cWhen it comes to the skin, one of the most evolutionarily conserved \u00a0reactions is the goosebump reaction, which is piloerection,\u201d she said.<\/p>\n

When it gets cold, the nerves send a message to a tiny muscle, called the arrector pili, located at the base of the hair follicle. As this muscle contracts, it creates the goosebump that raises the hair, providing extra warmth.<\/p>\n

Shwartz discovered that when mice are exposed to two weeks of cold, the nerves stimulate not only the contraction of the arrector pili muscle, but also the activation of the stem cells in the follicle to grow more hair\u2014thus keeping the animal warm.<\/p>\n

\u201cWorking on the skin, there are multiple different environmental changes, and they can lead \u00a0to multiple systemic effects. How all these systemic effects eventually converge to regulate stem cell behavior is one of the questions I\u2019m most fascinated about,\u201d she said. \u201cAnd it will give us an idea or better understanding of not only stem cell biology, but also how we can harness stem cells in order to combat wound healing or aging.\u201d<\/p>\n

Olena Zhulyn, PhD<\/a>, from Stanford University talked about translation, or how an organism uses genetic instructions to make the proteins it needs to build itself during embryonic development or repair itself after an injury such as a limb amputation. Specifically, Zhulyn focused on how an organism regulates this important process of translation, thus synthesizing either greater or lesser quantities of a given protein.<\/p>\n

\u201cWhen you think about protein synthesis, it\u2019s the last step in the journey from a gene\u00a0 \u00a0to a protein product,\u201d said Zhulyn, \u201cAnd my thinking was that if we look at the last step of this journey, we might get a more \u00a0\u00a0direct understanding of what is necessary for a process.\u201d<\/p>\n

When an embryo is forming, translational regulation allows an organism to rely on a small number of key developmental genes, such as SHH and WNT, to construct a vast diversity of anatomical structures.<\/p>\n

Zhulyn also examined translational regulation in the context of one of the most striking examples of vertebrate regeneration: the axolotl salamander\u2019s ability to regrow a severed arm. Following injury, the axolotl relies on a protein called mTOR to activate translation, increasing protein synthesis. In contrast, a mouse, which is unable to regrow an amputated finger, has a different form of mTOR that does not increase translation following injury.<\/p>\n

The axolotl \u201cis actually a very beautiful model to study scarless wound healing,\u201d said Zhulyn. \u201cI very much would love to pursue that in order to use the axolotl as a springboard to really promote better wound healing in mammalian tissues.\u201d<\/p>\n

Andy McMahon, PhD, FRS<\/a>, chair of USC\u2019s Department of Stem Cell Biology and Regenerative Medicine, thanked the scientists for their terrific talks.<\/p>\n

\u201cIt\u2019s been delightful to meet you,\u201d he said, \u201cand to hear about your wonderful science.\u201d<\/p>\n\n\n\n<\/div>\n <\/div>\n\n\n <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":168,"featured_media":4622,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[169],"class_list":["post-4621","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-release","tag-latest"],"acf":[],"yoast_head":"\nStem cell scientists explore the mysteries of regeneration at the Junior Faculty Candidate Seminar and Symposium<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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