82 results on '"Verónica A. Segarra"'
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2. Taking ownership of your career: professional development through experiential learning
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Verónica A. Segarra and William A. Gentry
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Professional development for scientists ,Tenure-track faculty ,Tenure ,Professoriate ,Professional development practicum ,Professional development experiential learning ,Medicine ,Science - Abstract
Abstract Experiential learning can facilitate the development of transferrable skills necessary for success in attaining tenure and promotion in academia. In this article, we discuss the benefits of designing and implementing an individualized professional development experience or practicum. By doing this, we describe the experiential learning component of the Accomplishing Career Transitions (ACT) Program of the American Society for Cell Biology. The ACT program aims to assist postdoctoral trainees and junior faculty from backgrounds underrepresented in STEM as they strive to transition into tenure-track positions and ultimately attain tenure at research-intensive or teaching-intensive academic institutions.
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- 2021
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3. Introducing Wound Healing Assays in the Undergraduate Biology Laboratory Using Ibidi Plates
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Yewseok K. Suh, Ashley Robinson, Nicholas Zanghi, Austin Kratz, Andrew Gustetic, Mackenzie M. Crow, Taylor Ritts, William Hankey, and Verónica A. Segarra
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wound healing assay ,ibidi plates ,cytotoxic agents ,HeLa cells ,cancer invasion ,Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
ABSTRACT The wound healing assay is a simple and inexpensive method that allows researchers to experimentally mimic cell growth and migration leading to wound healing. In this assay, a wound is created on a monolayer of cultured mammalian cells and cell migration is monitored. Micrographs are captured at regular intervals during the duration of the experiment. These microscopy images are analyzed to compare cell migration and wound closure under different conditions. Introduction of different cytotoxic treatments into a wound healing assay can provide information as to whether a particular drug or compound of interest has the ability to affect cell migration. This type of analysis is important when assessing the ability of a particular cancer cell line to display invasive and metastatic behaviors. One of the challenges of this assay is to create the original wound in a way that is consistent across plates or treatments, facilitating comparisons across experimental groups. This is a particular challenge when using the wound healing assay in the context of an undergraduate biology class to expose students to a distinct form of mammalian cell culture and help them apply scientific knowledge and research skills. We found an easy way to overcome this obstacle by using ibidi plates. In this article, we provide a simple protocol to use ibidi plates and HeLa cells to set up wound healing assays. This laboratory exercise allows undergraduate students to utilize different skills developed through cell culture experience, such as growing, treating, and imaging mammalian cells.
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- 2022
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4. Refining a DEI Assessment Tool for Use in Optimizing Professional STEM Societies for Gender Equity
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Gretalyn M. Leibnitz, Jan W. Peters, Rebecca Campbell-Montalvo, Heather Metcalf, Andrea Lucy Putwen, Donald L. Gillian-Daniel, Ershela L. Sims, and Verónica A. Segarra
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science technology engineering mathematics (STEM) ,equity ,professional societies and associations ,assessment ,survey design ,diversity ,Sociology (General) ,HM401-1281 - Abstract
Historic science, technology, engineering and mathematics (STEM) disciplinary cultures were founded in a system that was predominately male, white, heterosexual, and able-bodied (i.e., “majority”). Some societal norms have changed, and so has demand for inclusive STEM engagement. However, legacy mental models, or deeply held beliefs and assumptions, linger and are embedded in the STEM system and disciplinary cultures. STEM reform is needed to maximize talent and create inclusive professions, but cannot be achieved without recognizing and addressing norms and practices that disproportionately serve majority vs. minoritized groups. As leading voices in disciplinary work and application, disciplinary and professional societies (Societies) are instrumental in shaping and sustaining STEM norms. We, leaders of the Amplifying the Alliance to Catalyze Change for Equity in STEM Success (ACCESS+) project, recognize the need to provide Society diversity, equity, and inclusion (DEI) change leaders with tools necessary to foster systemic change. In this Perspectives article, we present the Equity Environmental Scanning Tool (EEST) as an aid to help Society DEI change leaders elucidate legacy mental models, discern areas of strength, identify foci for advancement, and benchmark organizational change efforts. We share our rationale and work done to identify, and, ultimately, adapt a Society DEI self-assessment tool from the United Kingdom. We share background information on the UK tool, content and structural changes made to create the EEST, and an overview of the resulting EEST. Ultimately, we seek to increase awareness of a Society-specific DEI self-assessment tool designed to help Society DEI change leaders advance inclusive reform.
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- 2022
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5. Scientific Societies Integrating Gender and Ethnoracial Diversity Efforts: A First Meeting Report from Amplifying the Alliance to Catalyze Change for Equity in STEM Success (ACCESS+)
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Rebecca Campbell-Montalvo, Andrea Lucy Putwen, Lucas Hill, Heather E. Metcalf, Ershela L. Sims, Jan W. Peters, Alexandra N. Zimmerman, Donald L. Gillian-Daniel, Gretalyn M. Leibnitz, and Verónica A. Segarra
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diversity ,equity ,inclusion ,professional STEM societies ,action planning ,community of practice ,Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
ABSTRACT Professional STEM societies have been identified as an important lever to address STEM diversity, equity, and inclusion. In this Perspectives article, we chronicle the highlights of the first Amplifying the Alliance to Catalyze Change for Equity in STEM Success (ACCESS+) convening held in September 2021. Here, we introduce the three-part ACCESS+ approach using a model that entails (i) completion of a DEI self-assessment known as the equity environmental scanning tool, (ii) guided action plan development and iteration, and (iii) sustained participation in a community of practice.
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- 2022
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6. Scientific Societies Fostering Inclusivity in the Life Sciences Through Engagement of Undergraduate Scientists
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Clara Primus, Alexandra N. Zimmerman, Avanthia K. Terovolas, Kirsten F. Block, Christopher G. Brown, Michael D. Burton, Ashanti Edwards, Candice M. Etson, Sonia C. Flores, Catherine Fry, Ashley N. Guillory, Susan L. Ingram, Richard McGee, Deborah L. Neely-Fisher, Stephanie Paxson, Laura Phelan, Kirsta Suggs, Leticia R. Vega, Elizabeth Vuong, J. Luis Lujan, Marina Ramirez-Alvarado, and Verónica A. Segarra
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undergraduate students ,diversity ,equity ,inclusion ,scientific societies ,student chapters ,Education (General) ,L7-991 - Abstract
Scientific societies serve as communities of practice in which scientists develop many of the skills and connections required for the progression of their careers. For example, scientific societies offer their members opportunities to attend career development programs, gain experience in communicating science, and receive recognition for achievements within their discipline. Programming for undergraduate student members has recently been increasing, both in prevalence and in its range of offerings. The Alliance to Catalyze Change for Equity in STEM Success, ACCESS, a meta-organization seeking equity and inclusivity in life sciences fields, has examined programs and opportunities focused on undergraduates across its member scientific societies to identify common themes, promising practices and challenges. In this article, we share and discuss our findings.
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- 2022
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7. The Inclusive Professional Framework for Societies: Changing Mental Models to Promote Diverse, Equitable, and Inclusive STEM Systems Change
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Gretalyn M. Leibnitz, Donald L. Gillian-Daniel, Robin M c C. Greenler, Rebecca Campbell-Montalvo, Heather Metcalf, Verónica A. Segarra, Jan W. Peters, Shannon Patton, Andrea Lucy-Putwen, and Ershela L. Sims
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inclusive professional framework for societies ,mental models ,intercultural mindfulness ,equity mindset ,inclusive relationships ,identity awareness ,Sociology (General) ,HM401-1281 - Abstract
Science, technology, engineering, and mathematics (STEM) professional societies (ProSs) are uniquely positioned to foster national-level diversity, equity, and inclusion (DEI) reform. ProSs serve broad memberships, define disciplinary norms and culture, and inform accrediting bodies and thus provide critical levers for systems change. STEM ProSs could be instrumental in achieving the DEI system reform necessary to optimize engagement of all STEM talent, leveraging disciplinary excellence resulting from diverse teams. Inclusive STEM system reform requires that underlying “mental models” be examined. The Inclusive Professional Framework for Societies (IPF: Societies) is an interrelated set of strategies that can help ProSs change leaders (i.e., “boundary spanners”) and organizations identify and address mental models hindering DEI reform. The IPF: Societies uses four “I's”—Identity awareness and Intercultural mindfulness (i.e., equity mindset) upon which inclusive relationships and Influential DEI actions are scaffolded. We discuss how the IPF: Societies complements existing DEI tools (e.g., Women in Engineering ProActive Network's Framework for Promoting Gender Equity within Organization; Amplifying the Alliance to Catalyze Change for Equity in STEM Success' Equity Environmental Scan Tool). We explain how the IPF: Societies can be applied to existing ProS policy and practice associated with common ProS functions (e.g., leadership, membership, conferences, awards, and professional development). The next steps are to pilot the IPF: Societies with a cohort of STEM ProSs. Ultimately, the IPF: Societies has potential to promote more efficient, effective, and lasting DEI organizational transformation and contribute to inclusive STEM disciplinary excellence.
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- 2022
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8. Kinetic assay of starvation sensitivity in yeast autophagy mutants allows for the identification of intermediary phenotypes
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Candyce M. Sturgeon, Meaghan R. Robinson, Molly C. Penton, Deanna C. Clemmer, Maria A. Trujillo, Ambar U. Khawaja, and Verónica A. Segarra
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Starvation sensitivity ,96-well plate assay ,High-throughput starvation sensitivity assay ,Autophagy ,Budding yeast ,Atg27 ,Medicine ,Biology (General) ,QH301-705.5 ,Science (General) ,Q1-390 - Abstract
Abstract Objective A classical method to quantitatively determine the starvation sensitivity phenotype of autophagy mutant budding yeast strains is to starve them for a period of time and then to assess the proportion of cells that retain the ability to form colonies when the availability of nutrients is restored. The readout of this colony-formation assay is generally evaluated after a fixed period of time following the restoration of nutrients, so that it can be considered an endpoint assay. One drawback we have identified is the inability to characterize subtle intermediary phenotypes that are detectable at the molecular level but fail to reach statistical significance in the colony formation experiment. We set out to determine whether a more dynamic measurement of growth during recovery after starvation would increase the sensitivity with which we are able to detect partial loss-of-function phenotypes. Results We describe a 96-well plate-based assay to kinetically assess starvation sensitivity in budding yeast that allows for the quantitative detection of very modest starvation sensitivity phenotypes with statistical significance in autophagy mutant yeast strains lacking the ATG27 gene.
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- 2019
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9. Using The Cancer Genome Atlas as an Inquiry Tool in the Undergraduate Classroom
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William Hankey, Nicholas Zanghi, Mackenzie M. Crow, Whitney H. Dow, Austin Kratz, Ashley M. Robinson, Meaghan R. Robinson, and Verónica A. Segarra
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bioinformatics ,cancer ,genomics ,cancer genomics ,undergraduate teaching and learning ,Genetics ,QH426-470 - Abstract
Undergraduate students in the biomedical sciences are often interested in future health-focused careers. This presents opportunities for instructors in genetics, molecular biology, and cancer biology to capture their attention using lab experiences built around clinically relevant data. As biomedical science in general becomes increasingly dependent on high-throughput data, well-established scientific databases such as The Cancer Genome Atlas (TCGA) have become publicly available tools for medically relevant inquiry. The best feature of this database is that it bridges the molecular features of cancer to human clinical outcomes—allowing students to see a direct connection between the molecular sciences and their future professions. We have developed and tested a learning module that leverages the power of TCGA datasets to engage students to use the data to generate and test hypotheses and to apply statistical tests to evaluate significance.
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- 2020
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10. Accomplishing Career Transitions 2019: facilitating success towards the professoriate
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Verónica A. Segarra, Jim Vigoreaux, Maria Elena Zavala, and Ashanti Edwards
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Professional development for scientists ,Tenure-track faculty ,Tenure ,Professoriate ,Professional development practicum ,Professional development experiential learning ,Medicine ,Science - Abstract
Abstract The Minorities Affairs Committee of the American Society for Cell Biology through its Accomplishing Career Transitions (ACT) program aims to ease critical transitions for postdocs and junior faculty from underrepresented backgrounds in STEM or from minority-serving institutions as they work towards promotion and tenure at a wide range of academic institutions. The ACT program is a 2-year cohort-based professional and skills development program that kicks off with a summer workshop and continues with additional online training sessions on selected topics, forging the creation of a permanent mentoring community for the participants. In this BMC Proceedings Supplement, we highlight selected content from the first ACT summer workshop held in 2019 at the Rizzo Center in Chapel Hill, NC. The goal of this BMC Proceedings Supplement is to amplify impact of ACT programming in a way that transcends the ACT Fellow community to benefit an increased number of scientists.
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- 2021
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11. Combining 3D-Printed Models and Open Source Molecular Modeling of p53 To Engage Students with Concepts in Cell Biology†
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Verónica A. Segarra and Richard J. Chi
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
While understanding macromolecular structural elements and their roles in dictating cellular function is critical to grasp basic concepts in biology, it can be challenging for students to master this content—these elements naturally exist at the nanoscale and are not observable with the naked eye. Oftentimes this understanding is catalyzed by impactful illustrations and animations found online and in textbooks. In recent years, 3D printing technology has become readily accessible as an additional way to generate models and visualize entities of interest. In this report, we describe and discuss the efficacy of an approach using 3D-printed models in combination with online open-source molecular modeling analyses of the macromolecular structure of p53 to engage students with molecular concepts in cancer cell biology and human health. This pedagogy strategy has been successfully integrated into an upper-level undergraduate course at a primarily undergraduate institution and a graduate biology course at a public research university. We describe the potential benefits while providing tools for others to integrate this strategy into their teaching.
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- 2020
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12. Establishing Partnerships for Science Outreach Inside and Outside the Undergraduate Classroom
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M. Todd Knippenberg, Anne Leak, Shirley Disseler, and Verónica A. Segarra
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
STEM outreach experiences provide aspiring scientists and healthcare professionals with opportunities to grow into new roles, integrate knowledge, and acquire soft skills. While STEM outreach publications often describe the outreach performed, few focus on how to establish strong partnerships, which are essential for outreach endeavors to succeed. Information on this is more important than ever before—grant agencies commonly require education and outreach plans that will reach a broader audience. Consequently, principal investigators who are not trained in education or outreach need tools to set up strong partnerships. To help fill this gap, here we outline the recommended steps for developing robust interdisciplinary STEM outreach programs that leverage institutional resources and community partnerships. This process yields strategic and sustainable opportunities for undergraduate students to learn as they engage with the STEM outreach team (students, faculty, university staff, and community partners) and the lay public. The outlined ideas broadly apply to creating outreach programs for trainees at any stage, not just undergraduates.
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- 2020
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13. Scientific Societies Advancing STEM Workforce Diversity: Lessons and Outcomes from the Minorities Affairs Committee of the American Society for Cell Biology
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Verónica A. Segarra, Sydella Blatch, Michael Boyce, Franklin Carrero-Martinez, Renato J. Aguilera, Michael J. Leibowitz, MariaElena Zavala, Latanya Hammonds-Odie, and Ashanti Edwards
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Promoting diversity and inclusiveness in the STEM academic workforce remains a key challenge and national priority. Scientific societies can play a significant role in this process through the creation and implementation of programs to foster STEM academic workforce diversification, and by providing mentoring and skills development training that empower scientists from under-represented minority (URM) backgrounds to succeed in their communities of practice. In this article, we provide examples of challenges met by scientific societies in these areas and present data from the American Society for Cell Biology, highlighting the benefits received by trainees through long-term engagement with its programs. The success of these initiatives illustrates the impact of discipline-specific programming by scientific societies in supporting the development of URM scientists and an increasingly diverse and inclusive academic STEM community.
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- 2020
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14. Student performance on the Test of Scientific Literacy Skills (TOSLS) does not change with assignment of a low-stakes grade
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Verónica A. Segarra, Nicole M. Hughes, Kristin M. Ackerman, Michael H. Grider, Todd Lyda, and Patrick A. Vigueira
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Test of Scientific Literacy Skills (TOSLS) ,Response-validated multiple-choice assessments ,Low-stakes testing ,No-stakes testing ,Student effort ,Medicine ,Biology (General) ,QH301-705.5 ,Science (General) ,Q1-390 - Abstract
Abstract Objective Response-validated multiple-choice assessments are used in college courses to assess student learning gains. The ability of a test to accurately reflect student learning gains is highly dependent on the students’ effort. Within our institution, lackluster student effort is common on response-validated multiple-choice concept assessments that are not included as a portion of the semester grade but are used to inform curricular changes. Thus, we set out to determine whether increasing testing stakes by assigning a grade on student performance had an effect on student score and self-reported effort. The Test of Scientific Literacy Skills (TOSLS) is a response-validated multiple-choice assessment used to measure scientific literacy in undergraduates. We administered the TOSLS to students enrolled in a general education Biology course, both during the first 2 weeks (pretest) and the last 2 weeks (posttest) of the course. Results Self-reported effort and TOSLS performance were significantly correlated in the ungraded cohort. This relationship did not exist in the graded sections. Our data indicate that assigning a low-stakes grade has no significant effect on mean student performance or self-reported effort on the TOSLS within our general education course.
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- 2018
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15. Using an Activity Based on Constructivism To Help Students Develop a More Integrated Understanding of Cell Signaling Pathways
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Laura MacDonald, Verónica A. Segarra, and Amanda Solem
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
In subjects like cell biology, genetics, and immunology, a solid understanding of signal transduction is key to mastering new content. Often times students’ approach to learning signal transduction pathways relies heavily on memorization. In this paper, we describe a modular method to introduce students to signal transduction. In this method, students are first presented with the discreet building blocks or molecules that comprise signaling pathways (such as the vocabulary terms signal molecule, receptor, effector and target) and asked to integrate the knowledge by building (“do it yourself” or DIY) their own signaling pathway. Students are then given the opportunity to learn about each other’s pathways to identify ways in which they overlap and diverge. Ultimately, students are given the task to search the literature to identify a real-world example that mimics or is very similar to the pathway they came up with and note similarities and differences. We find this is a way to foster students integrating signal transduction knowledge.
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- 2019
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16. Using the Improvisational 'Yes, and…' Approach as a Review Technique in the Student-Centered Biology Classroom
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Laura J. MacDonald, Amanda Solem, and Verónica A. Segarra
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
In the biological sciences, students frequently equate understanding to compiling and memorizing information as a series of isolated facts. For this reason, they struggle to connect major concepts across course curriculums. In other disciplines, improvisation techniques have been introduced as a way to engage with millenials, who learn best through inductive and experiential learning. Here we present an improvisational classroom activity called “Yes, and…” as a review technique that can be used throughout the semester and in multiple contexts to help students assimilate and integrate information. Students in small groups first review a major topic provided by the instructor (for example, DNA structure or DNA properties). Then, one student in the group contributes one sentence that starts a narrative about the topic being reviewed as learned in class. Additional members of the group then take turns, one at a time, to add additional layers of details to the narrative. The group dynamic continues until all of the students in the group have contributed at least one sentence to the narrative. Students are encouraged to listen carefully to their classmates’ contributions so that inaccurate ideas can be identified and tweaked through conversation at the end of one round of the exercise. The instructor moves between groups to continue to foster the learning experience. We find that the “Yes, and…” approach promotes deep student engagement with course material, collaboration among students of different backgrounds, and fosters development of oral communication skills.
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- 2016
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17. Key Concepts in Developmental Psychology and Science Pedagogy Help Undergraduates in High School Science Outreach
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Verónica A. Segarra and Mariann Tillery
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Science outreach often requires undergraduates to assume new roles as teachers, science communicators, role models, and mentors. Transitioning into these roles is a rewarding part of science outreach but can be daunting and challenging for students at this educational stage. We have created developmental psychology and science pedagogy primers to help ease these transitions for undergraduates. Students used these primers to learn about their audience before science outreach. Students also had the opportunity to converse with one another about the material provided in these primers during the planning stages of the outreach process. We find that becoming familiar with key concepts in developmental psychology and science pedagogy helps undergraduates get the most out of their science outreach experiences.
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- 2018
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18. STEAM: Using the Arts to Train Well-Rounded and Creative Scientists
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Verónica A. Segarra, Barbara Natalizio, Cibele V. Falkenberg, Stephanie Pulford, and Raquell M. Holmes
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
While the demand for a strong STEM workforce continues to grow, there are challenges that threaten our ability to recruit, train, and retain such a workforce in a way that is effective and sustainable and fosters innovation. One way in which we are meeting this challenge is through the use of the arts in the training of scientists. In this Perspectives article, we review the use of the arts in science education and its benefits in both K–12 and postsecondary education. We also review the use of STEAM (science, technology, engineering, arts, and mathematics) programs in science outreach and the development of professional scientists.
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- 2018
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19. Self-Driven Service Learning: Community-Student-Faculty Collaboratives Outside of the Classroom
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Verónica A. Segarra, Alexandra A. DeLucia, Alyssa A. DeLucia, Renee Fonseca, Michael P. Penfold, Katlyn M. Sawyer, Cecelia M. Harold, Courtney Reddig, Ashima Singh, Ibrahim Musri, Jacqueline C. Wright, J. J. Leissing, Samantha Dennis, Mary Catherine Pflug, Niki Fogle, Monique Moore, Sade Sims, Kelsey Matteson, and Meredith Hein
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Service learning is a community engagement pedagogy often used in the context of the undergraduate classroom to synergize course-learning objectives with community needs. We find that an effective way to catalyze student engagement in service learning is for student participation to occur outside the context of a graded course, driven by students’ own interests and initiative. In this paper, we describe the creation and implementation of a self-driven service learning program and discuss its benefits from the community, student, and faculty points of view. This experience allows students to explore careers in the sciences as well as identify skill strengths and weaknesses in an environment where mentoring is available but where student initiative and self-motivation are the driving forces behind the project’s success. Self-driven service learning introduces young scientists to the idea that their careers serve a larger community that benefits not only from their discoveries but also from effective communication about how these discoveries are relevant to everyday life.
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- 2015
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20. Applied Theatre Facilitates Dialogue about Career Challenges for Scientists
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Verónica A. Segarra, MariaElena Zavala, and Latanya Hammonds-Odie
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
The design of programs in support of a strong, diverse, and inclusive scientific workforce and academe requires numerous difficult conversations about sensitive topics such as the challenges scientists can face in their professional development. Theatre can be an interactive and effective way to foster discussion around such subjects. This article examines the implementation and benefits of such interactive strategies in different contexts, including the benefits of getting early career academics and professionals talking about some of the situations that women and underrepresented minorities face in the workplace, while allowing more seasoned professionals and colleagues to join in the conversation.
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- 2017
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21. Introducing Mammalian Cell Culture and Cell Viability Techniques in the Undergraduate Biology Laboratory
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Kristen Bowey-Dellinger, Luke Dixon, Kristin Ackerman, Cynthia Vigueira, Yewseok K. Suh, Todd Lyda, Kelli Sapp, Michael Grider, Dinene Crater, Travis Russell, Michael Elias, V. McNeil Coffield, and Verónica A. Segarra
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Undergraduate students learn about mammalian cell culture applications in introductory biology courses. However, laboratory modules are rarely designed to provide hands-on experience with mammalian cells or teach cell culture techniques, such as trypsinization and cell counting. Students are more likely to learn about cell culture using bacteria or yeast, as they are typically easier to grow, culture, and manipulate given the equipment, tools, and environment of most undergraduate biology laboratories. In contrast, the utilization of mammalian cells requires a dedicated biological safety cabinet and rigorous antiseptic techniques. For this reason, we have devised a laboratory module and method herein that familiarizes students with common cell culture procedures, without the use of a sterile hood or large cell culture facility. Students design and perform a time-efficient inquiry-based cell viability experiment using HeLa cells and tools that are readily available in an undergraduate biology laboratory. Students will become familiar with common techniques such as trypsinizing cells, cell counting with a hemocytometer, performing serial dilutions, and determining cell viability using trypan blue dye. Additionally, students will work with graphing software to analyze their data and think critically about the mechanism of death on a cellular level. Two different adaptations of this inquiry-based lab are presented—one for non-biology majors and one for biology majors. Overall, these laboratories aim to expose students to mammalian cell culture and basic techniques and help them to conceptualize their application in scientific research.
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- 2017
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22. Rolling Circle Mutagenesis of GST-mCherry to Understand Mutation, Gene Expression, and Regulation
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Jessica Cole, Amanda Ferguson, Verónica A. Segarra, and Susan Walsh
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Undergraduates are often familiar with textbook examples of human mutations that affect coding regions and the subsequent disorders, but they may struggle with understanding the implications of mutations in the regulatory regions of genes. We have designed a laboratory sequence that will allow students to explore the effect random mutagenesis can have on protein function, expression, and ultimately phenotype. Students design and perform a safe and time-efficient random mutagenesis experiment using error-prone rolling circular amplification of a plasmid expressing the inducible fusion protein glutathione S-transferase (GST)-mCherry. Mutagenized and wild-type control plasmid DNA, respectively, are then purified and transformed into bacteria to assess phenotypic changes. While bacteria transformed with the wild type control should be pink, some bacterial colonies transformed with mutagenized plasmids will exhibit a different color. Students attempt to identify their mutations by isolating plasmid from these mutant colonies, sequencing, and comparing their mutant sequence to the wild-type sequence. Additionally, students evaluate the potential effects of mutations on protein production by inducing GST-mCherry expression in cultures, generating cell lysates, and analyzing them using SDS-PAGE. Students who have a phenotypic difference but do not obtain a coding region mutation will be able to think critically about plasmid structure and regulation outside of the gene sequence. Students who do not obtain bacterial transformants have the chance to contemplate how mutation of antibiotic resistance genes or replication origins may have contributed to their results. Overall, this series of laboratories exposes students to basic genetic techniques and helps them conceptualize mutation beyond coding regions.
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- 2017
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23. Comparing Outdated and Updated Textbook Figures Helps Introduce Undergraduates to Primary Literature
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Verónica A. Segarra and Scott Tanner
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
Many of the didactic tools used in the undergraduate classroom, including textbooks, often highlight science as a body of knowledge, presenting learners with a field’s current “up-to-date” understanding of a subject. It is important that students grasp the idea that this body of knowledge is not static, but evolving through a process by which scientists continually test, revise, and build upon that knowledge. Science as a process is best highlighted in the primary scientific literature. In the context of the undergraduate classroom, we have used side-by-side comparison of old and updated textbook figures to introduce 200- and 300-level Genetics students to the field as a dynamic area of scientific inquiry. We also use this exercise as an opportunity to introduce students to relevant primary literature. We find that this is an effective way to transition students from their textbook to primary literature as a source of information.
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- 2015
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24. Experiential Posters: Theatrical and Improvisational Tools Aid in Science Museum Outreach
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Verónica A. Segarra, Michael Birnbaum, Alexandria Ortíz-Rosado, Darlah López-Rodríguez, Victoria Varona, Ji Zha, Shashana Fiedler, Wesam Azaizeh, and Herman Autore
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
We frequently use diagrams or animations to reveal to others biological phenomena that are both invisible to the naked eye and difficult to conceptualize. But these didactic tools fall short in that they generally do not provide feedback or interaction with the user, nor adapt easily to the user’s needs and abilities. Adaptability to the user’s educational level and needs is critical to catalyze effective learning, especially when the new content is highly complex in nature. The need for adaptability is key in museum learning environments, where the student audience is very diverse in age and academic training. We are rethinking the way we go about representing biological processes to general audiences, particularly highly complex topics such as those found in neuroscience. We have experimented with the concept of using (what we are calling) “experiential posters” in the context of museum educational experiences to represent processes in neuroscience in a way that is more accessible to the general public. An experiential poster is an installation that uses props and staging to provide the user or learner an opportunity to “act out” the sequence of events and the flow of materials in a biological process of interest. We describe the use of an “experiential poster” to meet specific learning objectives. We also discuss the potential for its use in service learning and science outreach education.
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- 2014
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25. Presenting Fake Figures: A Tool to Teach Effective Scientific Figure Design
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Verónica A. Segarra, Stephanie Pulford, and Susan Walsh
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Special aspects of education ,LC8-6691 ,Biology (General) ,QH301-705.5 - Abstract
As trained scientists, we become adept not only at analyzing and understanding figures in the scientific literature, but also at designing figures to effectively represent our own data and findings. As educators, we strive to pass on these skills to our students, some of whom will ultimately become scientists themselves. Conveying the principles of effective figure design can be challenging, particularly when students have had little exposure to the process of reading scientific literature, much less writing a piece of scientific literature. Improvisational activities in the classroom reinforce teaching goals such as spontaneity, risk-taking, creativity, communication skills, team-building, and critical thinking (2). Indeed, improv training for scientists is becoming more common, helping scientists to communicate more spontaneously about their work and connect with their audience (1). In this article, we present an improvisational game that can aid in the teaching of effective scientific figure design. This “Present-a-Fake-Figure Exercise” is applicable to both the classroom and laboratory settings. In this learning activity, students improvise presenting fake scientific figures to an audience of their peers. These fake figures are prepared beforehand by the instructor and exemplify the do’s and don’ts of scientific figure design. Some of the learning outcomes of the activity include (1) identifying what makes a scientific figure cohesive, easy to analyze, and reader-friendly, and (2) identifying strategies that are useful in the design of a multi-panel figure to convey a scientific story.
- Published
- 2013
- Full Text
- View/download PDF
26. Beyond Ticking Boxes: Holistic Assessment of Travel Award Programs Is Essential for Inclusivity
- Author
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Catherine Fry, Kirsta Suggs, Verónica A. Segarra, Laura Phelan, Candice M. Etson, Maria Elena Zavala, Latanya Hammonds-Odie, Clara Primus, Susan L. Ingram, Leticia R. Vega, Michael J. Leibowitz, Stephanie Paxson, Michael D. Burton, Ashley N. Guillory, J. Luis Lujan, Sonia C. Flores, Kirsten F. Block, Marina Ramirez-Alvarado, Richard McGee, Elizabeth Vuong, Ashanti Edwards, and Deborah L. Neely-Fisher
- Published
- 2021
27. Beyond Ticking Boxes: Holistic Assessment of Travel Award Programs Is Essential for Inclusivity
- Author
-
Candice M. Etson, Kirsten Block, Michael D. Burton, Ashanti Edwards, Sonia Flores, Catherine Fry, Ashley N Guillory, Susan L. Ingram, Richard McGee, Deborah Neely-Fisher, Stephanie Paxson, Laura Phelan, Clara Primus, Kirsta Suggs, Leticia Vega, Elizabeth Vuong, Latanya Hammonds-Odie, Michael Leibowitz, MariaElena Zavala, J. Luis Lujan, Marina Ramirez-Alvarado, and Verónica A. Segarra
- Subjects
ComputingMilieux_THECOMPUTINGPROFESSION - Abstract
Many professional societies utilize travel awards programs to foster inclusion and facilitate the professional development of underrepresented minority (URM) scientists. All member societies that participate in the Alliance to Catalyze Change for Equity in STEM Success (ACCESS) do so to some degree. Members of this meta-organization recently came together to share their different approaches to URM travel award program assessment. The practices of the Biophysical Society (BPS), one of the ACCESS member societies, is used as a case study to discuss the highlights of our findings. We share and discuss a framework for URM travel award program assessment.
- Published
- 2022
28. Vps501, a novel vacuolar <scp>SNX‐BAR</scp> protein cooperates with the <scp>SEA</scp> complex to regulate <scp>TORC1</scp> signaling
- Author
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Shreya Goyal, Verónica A. Segarra, null Nitika, Aaron M. Stetcher, Andrew W. Truman, Adam M. Reitzel, and Richard J. Chi
- Subjects
Structural Biology ,Genetics ,Cell Biology ,Molecular Biology ,Biochemistry - Abstract
The sorting nexins (SNX), constitute a diverse family of molecules that play varied roles in membrane trafficking, cell signaling, membrane remodeling, organelle motility and autophagy. In particular, the SNX-BAR proteins, a SNX subfamily characterized by a C-terminal dimeric Bin/Amphiphysin/Rvs (BAR) lipid curvature domain and a conserved Phox-homology domain, are of great interest. In budding yeast, many SNX-BARs proteins have well-characterized endo-vacuolar trafficking roles. Phylogenetic analyses allowed us to identify an additional SNX-BAR protein, Vps501, with a novel endo-vacuolar role. We report that Vps501 uniquely localizes to the vacuolar membrane and has physical and genetic interactions with the SEA complex to regulate TORC1 inactivation. We found cells displayed a severe deficiency in starvation-induced/nonselective autophagy only when SEA complex subunits are ablated in combination with Vps501, indicating a cooperative role with the SEA complex during TORC1 signaling during autophagy induction. Additionally, we found the SEACIT complex becomes destabilized in vps501Δsea1Δ cells, which resulted in aberrant endosomal TORC1 activity and subsequent Atg13 hyperphosphorylation. We have also discovered that the vacuolar localization of Vps501 is dependent upon a direct interaction with Sea1 and a unique lipid binding specificity that is also required for its function. This article is protected by copyright. All rights reserved.
- Published
- 2022
29. Scientific Societies Team Up to Foster a Diverse STEM Workforce
- Author
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Verónica A. Segarra
- Published
- 2022
30. Scientific Societies Integrating Gender and Ethnoracial Diversity Efforts: A First Meeting Report from Amplifying the Alliance to Catalyze Change for Equity in STEM Success (ACCESS+)
- Author
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Rebecca Campbell-Montalvo, Andrea Lucy Putwen, Lucas Hill, Heather E. Metcalf, Ershela L. Sims, Jan W. Peters, Alexandra N. Zimmerman, Donald L. Gillian-Daniel, Gretalyn M. Leibnitz, and Verónica A. Segarra
- Subjects
General Immunology and Microbiology ,General Agricultural and Biological Sciences ,General Biochemistry, Genetics and Molecular Biology ,Education - Abstract
Professional STEM societies have been identified as an important lever to address STEM diversity, equity, and inclusion. In this Perspectives article, we chronicle the highlights of the first Amplifying the Alliance to Catalyze Change for Equity in STEM Success (ACCESS+) convening held in September 2021.
- Published
- 2021
31. Comprehensive characterization of the Hsp70 interactome reveals novel client proteins and interactions mediated by posttranslational modifications
- Author
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null Nitika, Bo Zheng, Linhao Ruan, Jake T. Kline, Siddhi Omkar, Jacek Sikora, Mara Texeira Torres, Yuhao Wang, Jade E. Takakuwa, Romain Huguet, Cinzia Klemm, Verónica A. Segarra, Matthew J. Winters, Peter M. Pryciak, Peter H. Thorpe, Kazuo Tatebayashi, Rong Li, Luca Fornelli, and Andrew W. Truman
- Subjects
Saccharomyces cerevisiae Proteins ,General Immunology and Microbiology ,General Neuroscience ,Humans ,HSP70 Heat-Shock Proteins ,Saccharomyces cerevisiae ,HSP90 Heat-Shock Proteins ,General Agricultural and Biological Sciences ,Protein Processing, Post-Translational ,General Biochemistry, Genetics and Molecular Biology ,Protein Binding ,Molecular Chaperones - Abstract
Hsp70 interactions are critical for cellular viability and the response to stress. Previous attempts to characterize Hsp70 interactions have been limited by their transient nature and the inability of current technologies to distinguish direct versus bridged interactions. We report the novel use of cross-linking mass spectrometry (XL-MS) to comprehensively characterize the Saccharomyces cerevisiae (budding yeast) Hsp70 protein interactome. Using this approach, we have gained fundamental new insights into Hsp70 function, including definitive evidence of Hsp70 self-association as well as multipoint interaction with its client proteins. In addition to identifying a novel set of direct Hsp70 interactors that can be used to probe chaperone function in cells, we have also identified a suite of posttranslational modification (PTM)-associated Hsp70 interactions. The majority of these PTMs have not been previously reported and appear to be critical in the regulation of client protein function. These data indicate that one of the mechanisms by which PTMs contribute to protein function is by facilitating interaction with chaperones. Taken together, we propose that XL-MS analysis of chaperone complexes may be used as a unique way to identify biologically important PTMs on client proteins.
- Published
- 2022
32. A novel multifunctional role for Hsp70 in binding post-translational modifications on client proteins
- Author
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Jade E. Takakuwa, Yuhao Wang, Verónica A. Segarra, Romain Huguet, Peter M. Pryciak, Bo Zheng, Jacek Sikora, Nitika, Matthew J. Winters, Kazuo Tatebayashi, Peter H. Thorpe, Jake T. Kline, Cinzia Klemm, Mara Texeira Torres, Andrew W. Truman, Luca Fornelli, Linhao Ruan, and Rong Li
- Subjects
Protein function ,biology ,Chemistry ,Chaperone (protein) ,biology.protein ,Computational biology ,Interactome ,Budding yeast ,Cellular viability ,Function (biology) ,Hsp70 - Abstract
SummaryHsp70 interactions are critical for cellular viability and the response to stress. Previous attempts to characterize Hsp70 interactions have been limited by their transient nature and inability of current technologies to distinguish direct vs bridged interactions. We report the novel use of cross-linking mass spectrometry (XL-MS) to comprehensively characterize the budding yeast Hsp70 protein interactome. Using this approach, we have gained fundamental new insights into Hsp70 function, including definitive evidence of Hsp70 self-association as well as multi-point interaction with its client proteins. In addition to identifying a novel set of direct Hsp70 interactors which can be used to probe chaperone function in cells, we have also identified a suite of PTM-associated Hsp70 interactions. The majority of these PTMs have not been previously reported and appear to be critical in the regulation of client protein function. These data indicate that one of the mechanisms by which PTMs contribute to protein function is by facilitating interaction with chaperones. Taken together, we propose that XL-MS analysis of chaperone complexes may be used as a unique way to identify biologically-important PTMs on client proteins.In vivo confirmation of Hsp70 dimerizationComprehensive direct interactome of Hsp70Multi-domain interactions between Hsp70 and client proteinsIdentification of novel biologically-important client protein PTMs
- Published
- 2021
33. Accomplishing Career Transitions 2019: facilitating success towards the professoriate
- Author
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Ashanti Edwards, Jim O. Vigoreaux, Maria Elena Zavala, and Verónica A. Segarra
- Subjects
0301 basic medicine ,Professoriate ,Science ,media_common.quotation_subject ,Minorities Affairs Committee ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,0302 clinical medicine ,Promotion (rank) ,Political science ,Chapel ,media_common ,computer.programming_language ,Professional development for scientists ,Introduction ,Tenure-track faculty ,Medical education ,American Society for Cell Biology ,Tenure ,Professional development experiential learning ,General Medicine ,030104 developmental biology ,030228 respiratory system ,Work (electrical) ,Accomplishing Career Transitions ,Medicine ,computer ,Professional development practicum - Abstract
The Minorities Affairs Committee of the American Society for Cell Biology through its Accomplishing Career Transitions (ACT) program aims to ease critical transitions for postdocs and junior faculty from underrepresented backgrounds in STEM or from minority-serving institutions as they work towards promotion and tenure at a wide range of academic institutions. The ACT program is a 2-year cohort-based professional and skills development program that kicks off with a summer workshop and continues with additional online training sessions on selected topics, forging the creation of a permanent mentoring community for the participants. In this BMC Proceedings Supplement, we highlight selected content from the first ACT summer workshop held in 2019 at the Rizzo Center in Chapel Hill, NC. The goal of this BMC Proceedings Supplement is to amplify impact of ACT programming in a way that transcends the ACT Fellow community to benefit an increased number of scientists.
- Published
- 2021
34. La responsabilidad social empresarial desde la percepción de los empleados
- Author
-
Silvia Verónica Cabrera-Segarra and Edwin Joselito Vásquez-Erazo
- Abstract
La responsabilidad social empresarial (RSE) se ha convertido en uno de los términos más importantes en el mundo empresarial; no solo se enfoca en buscar el beneficio de la empresa, sino también en el cuidado de la sociedad en la que se desarrolla. La investigación tiene como propósito analizar los factores que involucra la RSE y la percepción que tienen los empleados de la Cooperativa de Ahorro y Crédito Santa Isabel, para el desarrollo de un modelo estratégico alineado a los principios de la RSE, que cumpla con las expectativas de los grupos de interés. De tipo descriptiva. Se encontró que los colaboradores relacionan a la RSE con generar mejoras significativas en el servicio ofertado a los grupos de interés. Ante lo cual, el manejo de una mercadotecnia responsable por parte de la entidad es vital para tener un acercamiento más oportuno con la colectividad.
- Published
- 2022
35. Vps501, a novel vacuolar SNX-BAR protein cooperates with the SEA complex to induce autophagy
- Author
-
Verónica A. Segarra, Nitika, Reitzel Am, Goyal S, Stecher Am, Chi Rj, and Andrew W. Truman
- Subjects
SEA complex ,Cell signaling ,Subfamily ,Chemistry ,Sorting Nexins ,Amphiphysin ,Autophagy ,Organelle ,Motility ,Cell biology - Abstract
The sorting nexins (SNX), constitute a diverse family of molecules that play varied roles in membrane trafficking, cell signaling, membrane remodeling, organelle motility and autophagy. In particular, the SNX-BAR proteins, a SNX subfamily characterized by a C-terminal dimeric Bin/Amphiphysin/Rvs (BAR) lipid curvature domain and a conserved Phox-homology domain, are of great interest. In budding yeast, many SNX-BARs proteins have well-characterized endo-vacuolar trafficking roles. Phylogenetic analyses allowed us to identify an additional SNX-BAR protein, Vps501, with a novel endo-vacuolar role. We report that Vps501 uniquely localizes to the vacuolar membrane and works with the SEA complex to regulate autophagy. Furthermore, we found cells displayed a severe deficiency in starvation-induced/nonselective autophagy only when SEA complex subunits are ablated in combination with Vps501, indicating a cooperative role with the SEA complex during autophagy. Additionally, we found the SEA complex becomes destabilized in vps501Δsea1Δ cells, which resulted in aberrant TORC1 hyperactivity and misregulation of autophagy induction.
- Published
- 2021
36. Introducing Mammalian Cell Colony Formation in the Undergraduate Biology Laboratory
- Author
-
Austin Kratz, Ashley M. Robinson, Taylor Ritts, Mackenzie M. Crow, Yewseok K. Suh, and Verónica A. Segarra
- Subjects
QH301-705.5 ,Cell ,education ,Tips & Tools ,Computational biology ,General Biochemistry, Genetics and Molecular Biology ,Education ,HeLa ,03 medical and health sciences ,Mammalian cell ,medicine ,Biology (General) ,Clonogenic assay ,030304 developmental biology ,0303 health sciences ,General Immunology and Microbiology ,biology ,LC8-6691 ,05 social sciences ,050301 education ,biology.organism_classification ,Special aspects of education ,medicine.anatomical_structure ,Colony formation ,Cell culture ,General Agricultural and Biological Sciences ,0503 education - Abstract
Clonogenic assays are a simple and robust method that allow researchers to characterize mammalian cell line features, including the ability of a single cell to grow into a colony. We have used this assay as a tool in the undergraduate biology laboratory, exposing students to a more specialized form of mammalian cell culture and helping them refine scientific research skills and knowledge. In this article, we share an easy and undergraduate-friendly method of using HeLa cells to carry out clonogenic assays. The methods described include the introduction of different treatments to assess their effect in HeLa cell colony formation. In this laboratory exercise, undergraduate students utilize different cell culture techniques such as growing, harvesting, counting, diluting, staining, and imaging cells. Clonogenic assay, Cytotoxic agents, HeLa cells, Mammalian cell colony formation, undergraduate laboratory, Open Inquiry-Based Curriculum
- Published
- 2021
37. Atg27p localization is clathrin- and Ent3p/5p-dependent
- Author
-
Verónica A, Segarra, Anupam, Sharma, and Sandra K, Lemmon
- Subjects
New Finding ,Phenotype Data ,Expression Data - Abstract
The autophagy-related protein Atg27p has been previously shown to localize to the autophagy-specific pre-autophagosomal structure (PAS) as well as to several organelles, including the late Golgi or trans-Golgi network (TGN), the vacuolar membrane, and the early and late endosomes (Segarra et al. 2015). Moreover, Atg27p localization to the vacuolar membrane, in particular, is dependent on both its C-terminal tyrosine sorting motif and the AP-3 adaptor (Segarra et al. 2015; Suzuki and Emr 2019), but not other yeast AP-related adaptors (Segarra et al. 2015). We recently reported that Atg27p can be found in clathrin-coated vesicles (CCVs; Ding, Segarra et al. 2016, See accompanying micropublication). For this reason, we set out to determine whether Atg27p localization is dependent on clathrin or on any other of its cargo adaptors.
- Published
- 2021
- Full Text
- View/download PDF
38. YML018C protein localizes to the vacuolar membrane independently of Atg27p
- Author
-
Candyce M, Sturgeon, Nicholas, Zanghi, Hannah M, Smith, Emily K, Davis, Meaghan R, Robinson, Elizabeth, Cabrera, Molly C, Holbrook, and Verónica A, Segarra
- Abstract
Large-scale studies have localized the uncharacterized YML018C protein to the vacuolar membrane and have identified the autophagy-related protein Atg27p as one of its 10 physical interactors (Huh et al., 2003; Tarasov et al., 2008). These two findings suggested a potential role for the YML018C protein in the process of autophagy. In silico methods predict that the YML018C protein has 8 transmembrane domains, with both N- and C-terminal regions facing the cytoplasm (Krogh et al., 2000). Structure prediction algorithms identify the YML018C protein as a candidate GDP-mannose (or nucleotide sugar) transporter (Kelley et al., 2015).
- Published
- 2021
- Full Text
- View/download PDF
39. Scientific Societies Fostering Inclusivity through Speaker Diversity in Annual Meeting Programming: A Call to Action
- Author
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Laura Phelan, Candice M. Etson, Marina Ramirez-Alvarado, J. Luis Lujan, Elizabeth Vuong, Clara Primus, Ashanti Edwards, J. Christopher Havran, Sonia C. Flores, Susan L. Ingram, Verónica A. Segarra, Alfredo Leon, Richard McGee, Ashley N. Guillory, Mark A. Lawson, Stephanie Paxson, Michael D. Burton, Catherine Fry, Kirsta Suggs, Graciela A. Unguez, and Leticia R. Vega
- Subjects
Societies, Scientific ,0303 health sciences ,Delegate ,business.industry ,media_common.quotation_subject ,05 social sciences ,050301 education ,Cultural Diversity ,Cell Biology ,Biology ,Public relations ,Research Personnel ,Call to action ,03 medical and health sciences ,Humans ,Speech ,business ,0503 education ,Molecular Biology ,Inclusion (education) ,Perspectives ,Demography ,030304 developmental biology ,Diversity (politics) ,media_common - Abstract
Scientific societies aiming to foster inclusion of scientists from underrepresented (UR) backgrounds among their membership often delegate primary responsibility for this goal to a diversity-focused committee. The National Science Foundation has funded the creation of the Alliance to Catalyze Change for Equity in STEM Success (ACCESS), a meta-organization bringing together representatives from several such STEM society committees to serve as a hub for a growing Community of Practice. Its goal is to coordinate efforts to advance inclusive practices by sharing experiences and making synergistic discoveries about what works. ACCESS has analyzed the approaches by which member societies have sought to ensure inclusivity through selection of annual meeting speakers. Not only do we discuss how inclusive speaker selection fosters better scientific environments for all, but also identify challenges and promising practices for societies striving to maximize inclusivity of speakers in their scientific programming.
- Published
- 2020
40. New Perspectives on SNARE Function in the Yeast Minimal Endomembrane System
- Author
-
Verónica A. Segarra, Richard J. Chi, and James H. Grissom
- Subjects
0301 basic medicine ,Saccharomyces cerevisiae Proteins ,lcsh:QH426-470 ,Endosome ,Saccharomyces cerevisiae ,Endocytic cycle ,membrane fusion ,Review ,yeast ,Clathrin ,03 medical and health sciences ,symbols.namesake ,clathrin ,Genetics ,Golgi ,endocytosis ,Endomembrane system ,Genetics (clinical) ,030102 biochemistry & molecular biology ,biology ,Chemistry ,membrane trafficking ,Intracellular Membranes ,Golgi apparatus ,biology.organism_classification ,Yeast ,Cell biology ,lcsh:Genetics ,030104 developmental biology ,Endocytic vesicle ,SNARE ,biology.protein ,symbols ,SNARE Proteins - Abstract
Saccharomyces cerevisiae is one of the best model organisms for the study of endocytic membrane trafficking. While studies in mammalian cells have characterized the temporal and morphological features of the endocytic pathway, studies in budding yeast have led the way in the analysis of the endosomal trafficking machinery components and their functions. Eukaryotic endomembrane systems were thought to be highly conserved from yeast to mammals, with the fusion of plasma membrane-derived vesicles to the early or recycling endosome being a common feature. Upon endosome maturation, cargos are then sorted for reuse or degraded via the endo-lysosomal (endo-vacuolar in yeast) pathway. However, recent studies have shown that budding yeast has a minimal endomembrane system that is fundamentally different from that of mammalian cells, with plasma membrane-derived vesicles fusing directly to a trans-Golgi compartment which acts as an early endosome. Thus, the Golgi, rather than the endosome, acts as the primary acceptor of endocytic vesicles, sorting cargo to pre-vacuolar endosomes for degradation. The field must now integrate these new findings into a broader understanding of the endomembrane system across eukaryotes. This article synthesizes what we know about the machinery mediating endocytic membrane fusion with this new model for yeast endomembrane function.
- Published
- 2020
41. Cryopreservation and the Freeze–Thaw Stress Response in Yeast
- Author
-
Meaghan R. Robinson, Verónica A. Segarra, Elizabeth Cabrera, Candyce M Sturgeon, Mackenzie M. Crow, and Laylah C Welch
- Subjects
0301 basic medicine ,Saccharomyces cerevisiae Proteins ,lcsh:QH426-470 ,Cryoprotectant ,030106 microbiology ,Saccharomyces cerevisiae ,Context (language use) ,Review ,yeast ,Cryopreservation ,Fight-or-flight response ,03 medical and health sciences ,Freezing ,Genetics ,Viability assay ,Genetics (clinical) ,cryoprotectants ,biology ,biology.organism_classification ,Adaptation, Physiological ,Yeast ,Cell biology ,lcsh:Genetics ,030104 developmental biology ,freeze–thaw stress response ,Adaptation - Abstract
The ability of yeast to survive freezing and thawing is most frequently considered in the context of cryopreservation, a practical step in both industrial and research applications of these organisms. However, it also relates to an evolved ability to withstand freeze–thaw stress that is integrated with a larger network of survival responses. These responses vary between different strains and species of yeast according to the environments to which they are adapted, and the basis of this adaptation appears to be both conditioned and genetic in origin. This review article briefly touches upon common yeast cryopreservation methods and describes in detail what is known about the biochemical and genetic determinants of cell viability following freeze–thaw stress. While we focus on the budding yeast Saccharomyces cerevisiae, in which the freeze–thaw stress response is best understood, we also highlight the emerging diversity of yeast freeze–thaw responses as a manifestation of biodiversity among these organisms.
- Published
- 2020
42. Using The Cancer Genome Atlas (TCGA) as an inquiry tool in the undergraduate classroom
- Author
-
William Hankey, Nicholas Zanghi, Mackenzie Crow, Whitney Dow, Austin Kratz, Ashley Robinson, Meaghan Robinson, and Verónica A. Segarra
- Abstract
Undergraduate students in the biomedical sciences are often interested in future health-focused careers. This presents opportunities for instructors in genetics, molecular biology and cancer biology to capture their attention using lab experiences built around clinically relevant data. As biomedical science in general becomes increasingly dependent on high-throughput data, well-established scientific databases such as TCGA have become publicly available tools for medically relevant inquiry. The best feature of this database is that it bridges the molecular features of cancer to human clinical outcomes, allowing students to see a direct connection between the molecular sciences and their future professions. We have developed and tested a learning module that leverages the power of TCGA datasets to engage students to use the data to generate and test hypotheses and to apply statistical tests to evaluate significance. (Peer reviewed/published version: https://www.frontiersin.org/articles/10.3389/fgene.2020.573992/full)
- Published
- 2020
43. Autophagy as an on-ramp to scientific discovery
- Author
-
Noah Franks, Verónica A. Segarra, Casey Garr, and Candyce M Sturgeon
- Subjects
0301 basic medicine ,030102 biochemistry & molecular biology ,Adaptor Protein Complex 3 ,Artophagosome ,Science ,Undergraduate education ,Scientific discovery ,Autophagosomes ,Cell Biology ,Biology ,Degree (music) ,Lipids ,Creativity ,03 medical and health sciences ,Science outreach ,030104 developmental biology ,Autophagy ,Humans ,Engineering ethics ,Molecular Biology ,Common view - Abstract
The common view of art and science as polar opposites along the educational spectrum can sometimes mask the degree to which they inform one another. In fact, art can also serve as a way to foster interest in querying the natural world, ultimately allowing us to recruit highly creative individuals to join the scientific community. We have experienced firsthand how cellular processes, such as autophagy, which are not usually highlighted or described in detail in foundational cell biology textbooks, have served as an on-ramp for artists at the undergraduate and high school levels in the context of scientific research and science outreach, respectively. We discuss our experiences in this article and highlight the ways in which art’s many dimensions are well-suited, not only for forging connections between scientists and their communities but also for encouraging creativity in the way scientists engage with visually and conceptually complex phenomena, such as autophagy. Abbreviations: AP-3: adaptor protein complex 3; Atg27: autophagy related protein 27; STEAM: science, technology, engineering, arts, and mathematics; STEM: science, technology, engineering and math.
- Published
- 2020
44. Scientific Societies Fostering Inclusive Scientific Environments through Travel Awards: Current Practices and Recommendations
- Author
-
Richard McGee, J. Luis Lujan, Michael J. Leibowitz, Marina Ramirez-Alvarado, Laura Phelan, Mark A. Lawson, Candice M. Etson, Sonia C. Flores, Ashley N. Guillory, Catherine Fry, Kirsta Suggs, Susan L. Ingram, Clara Primus, Elizabeth Vuong, Verónica A. Segarra, Latanya Hammonds-Odie, Maria Elena Zavala, Ashanti Edwards, Stephanie Paxson, and Leticia R. Vega
- Subjects
Societies, Scientific ,Essay ,media_common.quotation_subject ,Sense of community ,Awards and Prizes ,Environment ,General Biochemistry, Genetics and Molecular Biology ,Education ,03 medical and health sciences ,Engineering ,Underrepresented Minority ,030304 developmental biology ,media_common ,0303 health sciences ,Travel ,business.industry ,05 social sciences ,Professional development ,Equity (finance) ,050301 education ,Public relations ,Alliance ,Professional association ,business ,0503 education ,Inclusion (education) ,Diversity (politics) - Abstract
Diversity-focused committees continue to play essential roles in the efforts of professional scientific societies to foster inclusion and facilitate the professional development of underrepresented minority (URM) young scientists in their respective scientific disciplines. Until recently, the efforts of these committees have remained independent and disconnected from one another. Funding from the National Science Foundation has allowed several of these committees to come together and form the Alliance to Catalyze Change for Equity in STEM Success, herein referred to as ACCESS. The overall goal of this meta-organization is to create a community in which diversity-focused committees can interact, synergize, share their collective experiences, and have a unified voice on behalf of URM trainees in science, technology, engineering, and mathematics disciplines. In this Essay, we compare and contrast the broad approaches that scientific societies in ACCESS use to implement and assess their travel award programs for URM trainees. We also report a set of recommendations, including both short- and long-term outcomes assessment in populations of interest and specialized programmatic activities coupled to travel award programs.
- Published
- 2020
45. Intracellular Lipid Homeostasis and Trafficking in Autophagy
- Author
-
Meaghan R. Robinson, Verónica A. Segarra, Shreya Goyal, and Richard J. Chi
- Subjects
Chemistry ,Autophagy ,Cholesterol homeostasis ,Intracellular ,Cell biology - Published
- 2020
46. Scientific Societies Advancing STEM Workforce Diversity: Lessons and Outcomes from the Minorities Affairs Committee of the American Society for Cell Biology
- Author
-
Renato J. Aguilera, Latanya Hammonds-Odie, Michael Boyce, Michael J. Leibowitz, Franklin Carrero-Martinez, Maria Elena Zavala, Sydella Blatch, Verónica A. Segarra, and Ashanti Edwards
- Subjects
QH301-705.5 ,Diversification (marketing strategy) ,Workforce diversity ,General Biochemistry, Genetics and Molecular Biology ,Education ,03 medical and health sciences ,Political science ,Biology (General) ,lcsh:QH301-705.5 ,030304 developmental biology ,lcsh:LC8-6691 ,0303 health sciences ,LC8-6691 ,lcsh:Special aspects of education ,General Immunology and Microbiology ,4. Education ,05 social sciences ,050301 education ,Articles ,Stem Cell Research ,Special aspects of education ,Cell biology ,ComputingMilieux_GENERAL ,lcsh:Biology (General) ,Workforce ,General Agricultural and Biological Sciences ,0503 education ,Curriculum and Pedagogy - Abstract
Promoting diversity and inclusiveness in the STEM academic workforce remains a key challenge and national priority. Scientific societies can play a significant role in this process through the creation and implementation of programs to foster STEM academic workforce diversification, and by providing mentoring and skills development training that empower scientists from under-represented minority (URM) backgrounds to succeed in their communities of practice. In this article, we provide examples of challenges met by scientific societies in these areas and present data from the American Society for Cell Biology, highlighting the benefits received by trainees through long-term engagement with its programs. The success of these initiatives illustrates the impact of discipline-specific programming by scientific societies in supporting the development of URM scientists and an increasingly diverse and inclusive academic STEM community.
- Published
- 2020
47. Establishing Partnerships for Science Outreach Inside and Outside the Undergraduate Classroom
- Author
-
Shirley A. Disseler, Verónica A. Segarra, Anne E. Leak, and M. Todd Knippenberg
- Subjects
QH301-705.5 ,Process (engineering) ,General Biochemistry, Genetics and Molecular Biology ,Education ,03 medical and health sciences ,Leverage (negotiation) ,Political science ,ComputingMilieux_COMPUTERSANDEDUCATION ,Biology (General) ,lcsh:QH301-705.5 ,030304 developmental biology ,lcsh:LC8-6691 ,0303 health sciences ,LC8-6691 ,lcsh:Special aspects of education ,ComputingMilieux_THECOMPUTINGPROFESSION ,General Immunology and Microbiology ,Health professionals ,business.industry ,05 social sciences ,Soft skills ,Principal (computer security) ,050301 education ,Public relations ,Special aspects of education ,Outreach ,Science outreach ,lcsh:Biology (General) ,General Agricultural and Biological Sciences ,business ,0503 education ,Perspectives - Abstract
STEM outreach experiences provide aspiring scientists and health professionals with opportunities to grow into new roles, integrate knowledge and acquire soft skills. While STEM outreach publications often focus on describing the content of the outreach performed, few focus on setting up strong partnerships for outreach, a key element in STEM outreach success. Information on this area is important now more than ever, as grant agencies require education and outreach plans to reach a broader audience, principal investigators that are not trained in education or outreach need to have the tools to set up these strong partnerships. To help fill this gap, this article outlines the recommended steps to implement robust interdisciplinary STEM outreach programs that leverage institutional resources and community partnerships. This process yields strategic and sustainable opportunities for undergraduate students to engage and learn from interactions between the STEM outreach team (students, faculty, university staff, and community partners) and the lay public. The ideas outlined here are broadly applicable to creating outreach programs that engage trainees at any stage of academic training, not just at undergraduate level.
- Published
- 2020
48. Scientific Societies Fostering Inclusive Scientific Environments through Travel Awards: Current Practices and Recommendations
- Author
-
Verónica A. Segarra, Leticia Vega, Ashanti Edwards, Catherine Fry, Susan L. Ingram, Mark Lawson, Richard McGee, Laura Phelan, Kirsta Suggs, Elizabeth Vuong, J. Luis Lujan, and Marina Ramirez-Alvarado
- Abstract
Diversity-focused committees continue to play essential roles in the efforts of professional scientific societies to foster inclusion and facilitate the professional development of underrepresented minority (URM) young scientists in their respective scientific disciplines. Until recently, the efforts of these committees has remained independent and disconnected from one another. Funding from the National Science Foundation has allowed several of these committees to come together and form the Alliance to Catalyze Change for Equity in STEM Success, herein referred to as ACCESS. The overall goal of this meta-organization is to create a community in which diversity-focused committees can interact, synergize, share their collective experiences, and have a unified voice on behalf of URM trainees in STEM disciplines. In this article, we compare and contrast the broad approaches that scientific societies in ACCESS use to implement and assess their travel award programs for URM trainees. We also report a set of recommendations, including both short- and long-term outcomes assessment in populations of interest and specialized programmatic activities coupled to travel award programs.
- Published
- 2019
49. Kinetic assay of starvation sensitivity in yeast autophagy mutants allows for the identification of intermediary phenotypes
- Author
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Molly C. Penton, Ambar U. Khawaja, Maria A. Trujillo, Deanna C. Clemmer, Verónica A. Segarra, Candyce M Sturgeon, and Meaghan R. Robinson
- Subjects
0301 basic medicine ,Saccharomyces cerevisiae Proteins ,Period (gene) ,Mutant ,High-throughput starvation sensitivity assay ,lcsh:Medicine ,Autophagy-Related Proteins ,Saccharomyces cerevisiae ,Biology ,Starvation sensitivity ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Autophagy ,Budding yeast ,030212 general & internal medicine ,Sensitivity (control systems) ,lcsh:Science (General) ,lcsh:QH301-705.5 ,Gene ,Starvation ,lcsh:R ,Atg27 ,General Medicine ,Phenotype ,Yeast ,Cell biology ,Kinetics ,Research Note ,030104 developmental biology ,lcsh:Biology (General) ,Mutation ,medicine.symptom ,96-well plate assay ,lcsh:Q1-390 - Abstract
Objective A classical method to quantitatively determine the starvation sensitivity phenotype of autophagy mutant budding yeast strains is to starve them for a period of time and then to assess the proportion of cells that retain the ability to form colonies when the availability of nutrients is restored. The readout of this colony-formation assay is generally evaluated after a fixed period of time following the restoration of nutrients, so that it can be considered an endpoint assay. One drawback we have identified is the inability to characterize subtle intermediary phenotypes that are detectable at the molecular level but fail to reach statistical significance in the colony formation experiment. We set out to determine whether a more dynamic measurement of growth during recovery after starvation would increase the sensitivity with which we are able to detect partial loss-of-function phenotypes. Results We describe a 96-well plate-based assay to kinetically assess starvation sensitivity in budding yeast that allows for the quantitative detection of very modest starvation sensitivity phenotypes with statistical significance in autophagy mutant yeast strains lacking the ATG27 gene. Electronic supplementary material The online version of this article (10.1186/s13104-019-4545-0) contains supplementary material, which is available to authorized users.
- Published
- 2019
50. Using an Activity Based on Constructivism To Help Students Develop a More Integrated Understanding of Cell Signaling Pathways
- Author
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Verónica A. Segarra, Laura MacDonald, and Amanda Solem
- Subjects
Vocabulary ,Computer science ,QH301-705.5 ,media_common.quotation_subject ,education ,Tips & Tools ,General Biochemistry, Genetics and Molecular Biology ,Education ,Task (project management) ,03 medical and health sciences ,Constructivism (philosophy of education) ,Biology (General) ,030304 developmental biology ,media_common ,Cognitive science ,0303 health sciences ,General Immunology and Microbiology ,LC8-6691 ,business.industry ,05 social sciences ,SIGNAL (programming language) ,050301 education ,Modular design ,Special aspects of education ,Signal transduction ,General Agricultural and Biological Sciences ,business ,0503 education ,Cell signaling pathways - Abstract
In subjects like cell biology, genetics, and immunology, a solid understanding of signal transduction is key to mastering new content. Often times students’ approach to learning signal transduction pathways relies heavily on memorization. In this paper, we describe a modular method to introduce students to signal transduction. In this method, students are first presented with the discreet building blocks or molecules that comprise signaling pathways (such as the vocabulary terms signal molecule, receptor, effector and target) and asked to integrate the knowledge by building (“do it yourself” or DIY) their own signaling pathway. Students are then given the opportunity to learn about each other’s pathways to identify ways in which they overlap and diverge. Ultimately, students are given the task to search the literature to identify a real-world example that mimics or is very similar to the pathway they came up with and note similarities and differences. We find this is a way to foster students integrating signal transduction knowledge.
- Published
- 2019
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