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Engineers grow pancreatic "organoids" that mimic the real thing Engineers grow pancreatic "organoids" that mimic the real thing Studying these organoids could help researchers develop and test new treatments for pancreatic cancer, one of the deadliest types of cancer. Anne Trafton | MIT News Office Publication Date: September 13, 2021 Press Inquiries Press Contact: Sarah McDonnell Email: s_mcd@mit.edu Phone: 617-253-8923 Fax: 617-258-8762 MIT News Office Media Download synthetic gel in cell | Download Image Caption: MIT and Cancer Research UK Manchester Institute researchers have developed a synthetic gel that can be used to grow tiny pancreatic organoids, seen here, from human pancreatic cells. Credits: Courtesy of the researchers daigram of pancreatic organoids | Download Image Caption: The researchers were also able to use their system to grow supportive cells such as fibroblasts (green) and macrophages (orange) surrounding the pancreatic organoids. Credits: Credits: Joanna Kelly and Christopher Below *Terms of Use: Images for download on the MIT News office website are made available to non-commercial entities, press and the general public under a Creative Commons Attribution Non-Commercial No Derivatives license. You may not alter the images provided, other than to crop them to size. A credit line must be used when reproducing images; if one is not provided below, credit the images to "MIT." Close synthetic gel in cell Caption: MIT and Cancer Research UK Manchester Institute researchers have developed a synthetic gel that can be used to grow tiny pancreatic organoids, seen here, from human pancreatic cells. Credits: Courtesy of the researchers daigram of pancreatic organoids Caption: The researchers were also able to use their system to grow supportive cells such as fibroblasts (green) and macrophages (orange) surrounding the pancreatic organoids. Credits: Credits: Joanna Kelly and Christopher Below Previous image Next image MIT engineers, in collaboration with scientists at Cancer Research UK Manchester Institute, have developed a new way to grow tiny replicas of the pancreas, using either healthy or cancerous pancreatic cells. Their new models could help researchers develop and test potential drugs for pancreatic cancer, which is currently one of the most difficult types of cancer to treat. Using a specialized gel that mimics the extracellular environment surrounding the pancreas, the researchers were able to grow pancreatic "organoids," allowing them to study the important interactions between pancreatic tumors and their environment. Unlike some of the gels now used to grow tissue, the new MIT gel is completely synthetic, easy to assemble and can be produced with a consistent composition every time. "The issue of reproducibility is a major one," says Linda Griffith, the School of Engineering Professor of Teaching Innovation and a professor of biological engineering and mechanical engineering. "The research community has been looking for ways to do more methodical cultures of these kinds of organoids, and especially to control the microenvironment." The researchers have also shown that their new gel can be used to grow other types of tissue, including intestinal and endometrial tissue. Griffith and Claus Jorgensen, a group leader at the Cancer Research UK Manchester Institute, are the senior authors of the paper, which appears today in Nature Materials. The lead author is Christopher Below, a former graduate student at the Cancer Research UK Manchester Institute. Mimicking the microenvironment Traditionally, labs have used commercially available tissue-derived gel to grow organoids in a lab dish. However, as the most widely used commercial gel is a complex mixture of proteins, proteoglycans, and growth factors derived from a tumor grown in mice, it is variable from lot to lot and has undesirable components present, Griffith says. It also doesn't always allow for growth of multiple types of cells. About 10 years ago, Griffith's lab started to work on designing a synthetic gel that could be used to grow epithelial cells, which form the sheets that line most organs, along with other supportive cells. The gel they developed is based on polyethylene glycol (PEG), a polymer that is often used for medical applications because it doesn't interact with living cells. By studying the biochemical and biophysical properties of the extracellular matrix, which surrounds organs in the body, the researchers were able to identify features they could incorporate into the PEG gel to help cells grow in it. One key feature is the presence of molecules called peptide ligands, which interact with cell surface proteins called integrins. The sticky binding between ligands and integrins allows cells to adhere to the gel and form organoids. The researchers found that incorporating small synthetic peptides derived from fibronectin and collagen in their gels allowed them to grow a variety of epithelial tissues, including intestinal tissue. They showed that supportive cells called stromal cells, along with immune cells, can also thrive in this environment. In the new study, Griffith and Jorgensen wanted to see if the gel could also be used to support the growth of normal pancreatic organoids and pancreatic tumors. Traditionally, it has been difficult to grow pancreatic tissue in a manner that replicates both the cancerous cells and the supporting environment, because once pancreatic tumor cells are removed from the body, they lose their distinctive cancerous traits. Griffith's lab developed a protocol to produce the new gel, and then teamed up with Jorgensen's lab, which studies the biology of pancreatic cancer, to test it. Jorgensen and his students were able to produce the gel and use it to grow pancreatic organoids, using healthy or cancerous pancreatic cells derived from mice. "We got the protocol from Linda and we got the reagents in, and then it just worked," Jorgensen says. "I think that speaks volumes of how robust the system is and how easy it is to implement in the lab." Other approaches they had tried were too complicated or did not recapitulate the microenvironment seen in living tissues, he says. Using this gel, Jorgensen's lab was able to compare the pancreatic organoids to tissues they have studied in living mice, and they found that the tumor organoids express many of the same integrins seen in pancreatic tumors. Furthermore, other types of cells that normally surround tumors, including macrophages (a type of immune cells) and fibroblasts (a type of supportive cells), were also able to grow in the microenvironment. Patient-derived cells The researchers also showed that they can use their gel to grow organoids from pancreatic cancer cells from patients. They believe it could also be useful for studying lung, colorectal, and other cancers. Such systems could be used to analyze how potential cancer drugs affect tumors and their microenvironment. "The discoveries described in this paper will facilitate further important questions concerning responses to novel drug treatment approaches," says Hilary Critchley, a professor of reproductive medicine and co-deputy director of the MRC Centre for Reproductive Health at the University of Edinburgh, who was not involved in the study. "The cancer field has long relied upon other approaches (mouse models or isolated cell studies), and the contribution of the organoid approach, and notably the gel structure in which these mini groups of cells grow, will be pivotal to research advancement." Griffith also plans to use the gel to grow and study tissue from patients with endometriosis, a condition that causes the tissue that lines the uterus to grow outside the uterus. This can lead to pain and sometimes infertility. One of the advantages of the new gel is that it is completely synthetic, and can be made easily in a lab by mixing together specific precursors, including PEG and some polypeptides. The researchers have filed a patent on the technology and are in the process of licensing it to a company that could produce the gel commercially. The research was funded by Cancer Research UK, the Rosetrees Trust, a European Research Council Consolidator Award, the National Science Foundation, the National Institutes of Health, and the Defense Advanced Research Projects Agency. Share this news article on: * Twitter * Facebook * LinkedIn * Reddit * Print Paper Paper: "A microenvironment-inspired synthetic three-dimensional model for pancreatic ductal adenocarcinoma organoids" Related Links * Linda Griffith * Griffith Lab * Department of Biological Engineering * Department of Mechanical Engineering * School of Engineering * Cancer Research UK Manchester Institute * Claus Jorgensen Related Topics * Research * Cancer * Biological engineering * Mechanical engineering * School of Engineering * National Science Foundation (NSF) * National Institutes of Health (NIH) * Defense Advanced Research Projects Agency (DARPA) Related Articles organs-on-a-chip Our gut-brain connection MIT engineers have designed a microfluidic platform that connects engineered tissue from up to 10 organs, allowing them to replicate human-organ interactions. "Body on a chip" could improve drug evaluation A micrograph showing endometriosis (right) and ovarian stroma (left). 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