Tag: medicine

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OCTOPUS, an Optimized Device for Growing Mini-Organs in a Dish

by Devorah Fischler

With OCTOPUS, Dan Huh’s team has significantly advanced the frontiers of organoid research, providing a platform superior to conventional gel droplets. OCTOPUS splits the soft hydrogel culture material into a tentacled geometry. The thin, radial culture chambers sit on a circular disk the size of a U.S. quarter, allowing organoids to advance to an unprecedented degree of maturity.

When it comes to human bodies, there is no such thing as typical. Variation is the rule. In recent years, the biological sciences have increased their focus on exploring the poignant lack of norms between individuals, and medical and pharmaceutical researchers are asking questions about translating insights concerning biological variation into more precise and compassionate care.

What if therapies could be tailored to each patient? What would happen if we could predict an individual body’s response to a drug before trial-and-error treatment? Is it possible to understand the way a person’s disease begins and develops so we can know exactly how to cure it?

Dan Huh, Associate Professor in the Department of Bioengineering at the University of Pennsylvania’s School of Engineering and Applied Science, seeks answers to these questions by replicating biological systems outside of the body. These external copies of internal systems promise to boost drug efficacy while providing new levels of knowledge about patient health.

An innovator of organ-on-a-chip technology, or miniature copies of bodily systems stored in plastic devices no larger than a thumb drive, Huh has broadened his attention to engineering mini-organs in a dish using a patient’s own cells.

A recent study published in Nature Methods helmed by Huh introduces OCTOPUS, a device that nurtures organs-in-a-dish to unmatched levels of maturity. The study leaders include Estelle Park, doctoral student in Bioengineering, Tatiana Karakasheva, Associate Director of the Gastrointestinal Epithelium Modeling Program at Children’s Hospital of Philadelphia (CHOP), and Kathryn Hamilton, Assistant Professor of Pediatrics in Penn’s Perelman School of Medicine and Co-Director of the Gastrointestinal Epithelial Modeling Program at CHOP.

Read the full story in Penn Engineering Today.

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CAR T Cell Therapy Reaches Beyond Cancer

Penn Medicine researchers laud the early results for CAR T therapy in lupus patients, which point to broader horizons for the use of personalized cellular therapies.

Penn Medicine’s Carl June and Daniel Baker.

Engineered immune cells, known as CAR T cells, have shown the world what personalized immunotherapies can do to fight blood cancers. Now, investigators have reported highly promising early results for CAR T therapy in a small set of patients with the autoimmune disease lupus. Penn Medicine CAR T pioneer Carl June and Daniel Baker, a doctoral student in cell and molecular biology in the Perelman School of Medicine, discuss this development in a commentary published in Cell.

“We’ve always known that in principle, CAR T therapies could have broad applications, and it’s very encouraging to see early evidence that this promise is now being realized,” says June, who is the Richard W. Vague Professor in Immunotherapy in the department of Pathology and Laboratory Medicine at Penn Medicine and director of the Center for Cellular Immunotherapies at the Abramson Cancer Center.

T cells are among the immune system’s most powerful weapons. They can bind to, and kill, other cells they recognize as valid targets, including virus-infected cells. CAR T cells are T cells that have been redirected, through genetic engineering, to efficiently kill specifically defined cell types.

CAR T therapies are created out of each patient’s own cells—collected from the patient’s blood, and then engineered and multiplied in the lab before being reinfused into the patient as a “living drug.” The first CAR T therapy, Kymriah, was developed by June and his team at Penn Medicine, and received Food & Drug Administration approval in 2017. There are now six FDA-approved CAR T cell therapies in the United States, for six different cancers.

From the start of CAR T research, experts believed that T cells could be engineered to fight many conditions other than B cell cancers. Dozens of research teams around the world, including teams at Penn Medicine and biotech spinoffs who are working to develop effective treatments from Penn-developed personalized cellular therapy constructs, are examining these potential new applications. Researchers say lupus is an obvious choice for CAR T therapy because it too is driven by B cells, and thus experimental CAR T therapies against it can employ existing anti-B-cell designs. B cells are the immune system’s antibody-producing cells, and, in lupus, B cells arise that attack the patient’s own organs and tissues.

This story is by Meagan Raeke. Read more at Penn Medicine News.

Carl June is a member of the Penn Bioengineering Graduate Group. Read more stories featuring June’s research here.

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Penn Integrates Knowledge Professor Kevin Johnson Takes the Stage at ‘Engaging Minds’

by Michele Berger

Penn Integrates Knowledge Professor Kevin Johnson takes the stage at 24th Engaging Minds. (Image: Ben Asen)

This past weekend in New York City, the University of Pennsylvania showcased its 24th Engaging Minds event, the first in person since 2019. It was hosted by Penn Alumni.

Three Penn Integrates Knowledge University Professors — Kevin Johnson, Lance Freeman and Dolores Albarracín, — each discussed their research. The audience, at least 600 in person and remote, heard about using city planning to promote racial equity, about how conspiracy theories come to life and propagate, and about the need for physicians to communicate effectively with patients and families.

Following brief remarks from Penn Alumni President Ann Reese, University President Liz Magill introduced the event. “As many of you know, I’ve been thinking a lot and speaking often about what makes Penn Penn,” she said. “What are our distinctive strengths? What are the unique contributions to society that we have made in the past and can make in the future? And where do we go from the extraordinary position we are in now?”

Magill went on to express gratitude for the speakers and invited the audience to think about how the researchers’ work and expertise furthered what she described as the “twin principles of truth and opportunity.”

Effective communication

Johnson, the David L. Cohen University Professor with joint appointments in the Department of Computer and Information Science in the School of Engineering and Applied Science, and the Department of Biostatistics, Epidemiology, and Informatics in the Perelman School of Medicine, started his talk with a case study. “That case is going to be my case,” he said.

He took the audience through his family history, education and training, pausing at a point on the timeline when he was a young physician-scientist who had just explained a new medical topic to a journalist. “I felt really good about the conversation — and then the article came out,” Johnson said.

In the piece, he had been cast as saying that the medical community was over-treating this condition, “which is not what I said.” He realized in that moment that as a physician, he had been taught to communicate what a study finds, not how to act based on those findings. That experience shifted his thinking on how to communicate scientific topics, and he has spent decades trying to move the needle on how others in his field perceive this.

“As scientists we face obstacles. We face the obstacle of scale, so, small projects that we’re asked to generalize. We face the issue of trust. And then we face the issue of values,” Johnson said. “I’ll add a fourth, which is format; the way we choose to reach specific audiences will be different.”

Read more about the 24th Engaging Minds at Penn Today.

Kevin Johnson is the David L. Cohen University of Pennsylvania Professor in the Departments of Biostatistics, Epidemiology and Informatics and Computer and Information Science. As a Penn Integrates Knowlegde (PIK) University Professor, Johnson also holds appointments in the Departments of Bioengineering and Pediatrics, as well as in the Annenberg School of Communication.

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Penn Bioengineering Alumnus Named Schwarzman Scholar

Jiaqi Liu

Penn Bioengineering alumnus Jiaqi Liu has been named to the eighth class of Schwarzman Scholars and will enroll at Tsinghua University in Beijing in August.

The program’s core curriculum focuses on leadership, China, and global affairs, according to the Schwarzman program. The academic program is updated each year to align with current and future geopolitical priorities. The coursework, cultural immersion, and personal and professional development opportunities are designed to equip students with an understanding of China’s changing role in the world.

This year, approximately 151 Schwarzman Scholars were selected from a pool of 3,000 applicants from 36 countries and 121 universities.

Jiaqi Liu earned his master’s degree in bioengineering in the School of Engineering and Applied Science in 2021. After graduation, he returned to China and works in global early-stage Venture Capital. According to the Schwarzman Scholars program, Liu is passionate about promoting medical equality and affordable health care solutions and has experience in medtech startup, global pharmaceutical company, health care consulting, and health care venture capital.

This story is by Amanda Mott. Read more about the Schwarzman Scholars at Penn Today.

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‘Organ-on-a-Chip’ Device Provides New Insights into Early-Stage Pregnancy

by Scott Harris

Dan Huh’s BIOLines Lab develops several different kinds of organ-on-a-chip systems, such as this blinking-eye-on-a-chip.

If you’d read about it in a science fiction novel, you might not have believed it. Human organs and organ systems — from lungs to blood vessels to blinking eyes — bio-miniaturized and stored on a plastic chip no larger than a matchbook.

But that’s the breathing, blinking reality at the Biologically Inspired Engineering Systems (BIOLines) Laboratory in the Department of Bioengineering in the School of Engineering and Applied Sciences at the University of Pennsylvania, a bona fide pioneer of what is now widely known as “organ-on-a-chip” technology. Proponents hope these devices can one day help scientists around the world learn more about the body’s inner workings and ultimately improve disease prevention and treatment.

“The century-old practice of cell culture is to grow living cells isolated from the human body in hard plastic dishes and keep them bathed in copious amounts of culture media under static conditions, and that is drastically different than the complex, dynamic environment of native tissues in which these cell reside,” said Dan Dongeun Huh, Ph.D., BIOLines’ principal investigator and an associate professor of Bioengineering in Penn’s School of Engineering and Applied Science. “What makes this organ-on-a-chip technology so unique and powerful is that it enables us to reverse-engineer living human tissues using microengineered devices and mimic their intricate biological interactions and physiological functions in ways that have not been possible using traditional cell culture techniques. This represents a major advance in our ability to model and understand the inner workings of complex physiological systems in the human body.”

Generally speaking, organ-on-a-chip devices are made of clear silicone rubber — the same material used to make contact lenses — and can vary in size and design. Embedded within are microfabricated three-dimensional chambers lined with different human cell types, arranged and propagated to ultimately form a structure complex enough to actually mimic the essential elements of a functioning organ.

With partners at the Perelman School of Medicine, BIOLines recently developed a newer variation of the organ-on-a-chip: one that replicates the interface between maternal tissue and the cells of the placenta at the critical moments in early pregnancy when the embryo is implanting in the uterus. Huh and Penn Medicine physicians led a study using the “implantation-on-a-chip” to observe things that would otherwise have been virtually unobservable.

The study findings appeared this spring in the journal Nature Communications.

Continue reading at Penn Medicine News.

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Student Spotlight: Bella Mirro

Bella Mirro (BE 2023)

Bella Mirro, a fourth year student in Bioengineering who also minors in Chemistry, spoke with 34th Street Magazine about her many roles at Penn, including being Co–President of Shelter Health Outreach Program (SHOP), a Research Assistant in lab of Michal A. Elovitz, the Hilarie L. Morgan and Mitchell L. Morgan President’s Distinguished Professor in Women’s Health at Penn Medicine, and a Penn Engineering Council Marketing Team Member. In this Q&A, she discusses her research in women’s health and her passions for accessible healthcare, serving Philadelphia’s homeless community, and good food.

Read “Ego of the Week: Bella Mirro” in 34th Street.

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Penn Bioengineering Senior Discusses Remote Research Experience

Yi-An Hsieh (BE 2023)

Yi-An Hsieh, a fourth year Bioengineering student from Anaheim, California, worked remotely this summer on a team that spanned three labs, including the Kamoun Lab at the Hospital of the University of Pennsylvania. Hsieh credits her research on kidney graft failure with enriching her scientific skill set, exposing her to machine learning and real-time interaction with genetic datasets. In a guest post for the Career Services Blog, Hseih writes about her remote summer internship experience. “It showed me that this type of research energy that could not be dampened despite the distance,” she writes.

Read “Exploring How Amino Acid Polymorphisms Affect Graft Survival” in the Career Services Blog.

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Bushra Raj Receives NIH Grant Through High-risk, High-reward Research Program

Bushra Raj, Ph.D.

Eight researchers from the Perelman School of Medicine have received research grants designed to invest in high-risk, high-reward projects.

Bushra Raj, Assistant Professor of Cell and Developmental Biology in the Perelman School of Medicine and member of the Penn Bioengineering Graduate Group, was one of three Penn winners of the NIH Director’s New Innovator Award for independent projects developed by early-career investigators. More additional Penn scientists who received NIH Director’s Transformative Research Award for a project focusing on cancer research.

Raj’s project focuses on “testing a novel technology that uses CRISPR/Cas gene-editing tools to genomically record inputs from two signaling pathways in the developing zebrafish brain.”

Established in 2009, the Transformative Research Award promotes cross-cutting, interdisciplinary science and is open to individuals and teams of investigators who propose research that could potentially create or challenge existing paradigms.

Read the full list of grant recipients in Penn Medicine News.

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A Robot Made of Sticks

Kristina García

Devin Carroll, a doctoral candidate in the School of Engineering and Applied Sciences, is designing a modular robot called StickBot, which may be adapted for rehabilitation use in global public health settings.

Stickbot, a small robot composed of sticks, circuitry, actuators, a microcontroller, and a motor driver, lashed together with string.
StickBot in walking mode, using the sticks as legs to propel itself across the table.

In late summer, just as the leaves were starting to crisp and curl in the heat, Devin Carroll walked out of his apartment, looked on the ground, and picked up a couple of sticks that he thought might work for his robot. About half an inch thick and the length of an adult hand, he stripped the three sticks of their bark and lashed them with string to StickBot, a modular robot composed of circuitry, actuators, a microcontroller, and a motor driver.

Powered by four AA batteries, connected by a maze of wires and blinking lights, StickBot’s wooden arms now thump up and over, powering the robot across the table at Penn’s General Robotics, Automation, Sensing & Perception (GRASP) Lab, where Carroll is a Ph.D. candidate in the School of Engineering and Applied Sciences.

Controlling the robot using an app he designed, Carroll shows how StickBot can pivot from using the sticks as legs in “crawler mode,” to using them as arms. In “grasper mode,” the sticks are attached to a controller plate on one side to form a hinge joint while moving with their free end to hold a cup upright.

Rather than a static, singular invention, StickBot is an idea, a flexible system that can be reconfigured in a variety of ways. A modular robot, StickBot’s components can be added, adjusted, and discarded as needed.

Read the full story in Penn Engineering Today.

This article features quotes from Michelle Johnson, Associate Professor in Physical Medicine and Rehabilitation in the Perelman School of Medicine and in Bioengineering in the School of Engineering and Applied Sciences, and Director of the Rehabilitation Robotics Lab.

 

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CEMB Researchers Find that Disease Can Change the Physical Structure of Cells

by Ebonee Johnson

In these super-resolution images of tendon cell nuclei, the color coding represents chromatin density map, from low density in blue to high density in red. Comparing a healthy human tendon cell nucleus (left) to one diagnosed with tendinosis (right) shows that disease alters the spatial localization and compaction of chromatin.

Researchers from Penn’s Center for Engineering Mechanobiology (CEMB) have discovered that cells change the physical structure of their genome when they’re affected by disease.

In a recent study published in Nature Biomedical Engineering, the team detailed what they found when they closely observed the nucleus of cells inside connective tissues deteriorating as a result of tendinosis, which is the chronic condition that results from a tendon repeatedly suffering small injuries that don’t heal correctly. Using the latest super-resolution imaging techniques, they found that the tendon cells involved in maintaining the tissue’s structure in a diseased microenvironment improperly reorder their chromatin — the DNA-containing material that chromosomes are composed of — when attempting to repair.

This and other findings highlighted in the report point to the possibility of new treatments, such as small-molecule therapies, that could restore order to the affected cells.

“Interestingly, we were able to explain the role of mechanical forces on the 3-D organization of chromatin by developing a theory that integrates fundamental thermodynamic principles (physics) with the kinetics of epigenetic regulation (biology),” said study co-author and CEMB Director Vivek Shenoy in a news release from Penn Medicine News.

The CEMB, one of 18 active interdisciplinary research centers funded by the National Science Foundation’s Science and Technology Center (STC) program, brings together dozens of researchers from Penn Engineering and the Perelman School of Medicine, as well as others spread across campus and at partner institutions around the world.

With its funding recently renewed for another five years, the CEMB has entered  into a new phase of its mission, centered on the nascent concept of “mechanointelligence,” which is exemplified by studies like this one. While mechanobiology is the study of the physical forces that govern the behavior of cells and their communication with their neighbors, mechanointelligence adds another layer of complexity: attempting to understand the forces that allow cells to sense, remember and adapt to their environments.

Ultimately, harnessing these forces would allow researchers to help multicellular organisms — plants, animals and humans — better adapt to their environments as well.

Read “Aberrant chromatin reorganization in cells from diseased fibrous connective tissue in response to altered chemomechanical cues” at Nature Biomedical Engineering.

Read “The Locked Library: Disease Causes Cells to Reorder Their DNA Incorrectly” at Penn Medicine News.

This story originally appeared in Penn Engineering Today.

Vivek Shenoy is Eduardo D. Glandt President’s Distinguished Professor in Materials Science and Engineering, Bioengineering, and in Mechanical Engineering and Applied Mechanics.