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Learning Unit: Cells on the Move Cindy Jo Arrigo – New Jersey City University Rebecca Burdine – Princeton University Jonna Coombs – Adelphi University Jaclyn Schwalm – Princeton University David Swope – Rutgers/New Jersey City University Eugenia Villa-Cuesta – Adelphi University David Gross – Directional Cue Quick Review from the Balcony: Course: Sophomores/Intro level This Unit: middle of the course – 3 hours of class time total Our tidbit: At the end of the Unit The students would have learned the following information during the Unit, prior to this tidbit: Lagging edge http://klemkelab.ucsd.edu/research/cell.html Leading edge Green signal represents Actin Cell is migrating in direction of the arrow Learning Unit: Cells on the Move Learning Goals: 1. 2. 3. 4. Know how migratory cells sense and respond to environmental cues Understand how migratory cells become polarized Know how migratory cells move on and interact with the substrate Understand the importance of cell migration in development and disease Learning Objectives/Outcomes: Students should be able to – Describe a ligand-receptor pathway that can direct cell migration and explain a potential consequence of dysregulation of that pathway. (LG1 and 2) Create a diagram illustrating three cytoskeletal differences between migrating and non-migrating cells. (LG1 and 2) Compare and contrast cell matrix interactions at the leading/lagging edge of a cell. (LG 3) Design an experiment to determine if a specific signal is a directional cue. (LG1-4) Evaluate developmental and disease processes for the importance of cell migration. (LG4) Learning Activity: Your group is part of an international research and development team for a pharmaceutical company. Colon cancer is known to metastasize primarily to the lung and liver. Your team has isolated a new secreted protein from the liver you call Roadrunner, that you think may attract colon cancer cells to migrate to this location. Design an experiment to test whether Roadrunner can function as a directional cue for migrating cells. Be sure to include what controls you would need and explain how you would analyze your experimental results. One Potential Experiment: http://people.biology.ucsd.edu/firtel/video.htm Based on your knowledge of Roadrunner as a directional cue, and cell migration in cancer metastasis, identify the best protein to target with a drug to prevent cell migration in this type of colon cancer. A) Actin B) Roadrunner receptor C) Integrins D) Fibronectin E) Roadrunner protein Homework: Provide an example other than cancer, where cell migration is important for either development or disease. Be sure to explain why migration is important in this event and document your sources properly. Your answer should be no more than a paragraph, with sources documented below, and submitted through Blackboard or to your TA by 5pm tomorrow. Examples from the homework will be selected for sharing with the class. Rubric Scored on a 1-3 scale as described below : 3= Meets expectations; 2= Need improvement; 1= Incomplete Completion of the assignment 3- Assignment was a full paragraph edited and clearly written 2- Assignment was either not a full paragraph and/or poorly edited 1- Assignment was not submitted Articulation of the importance 3- Importance is articulated strongly and concisely 2- Importance is hinted at, but not clear 1- Importance is not addressed Proper documentation of sources 3- Sources were credible and documented 2- Sources were provided, but were either not credible and/or not documented 1- No sources were provided Ideas for Scaling this Tidbit Small class <40 – Tidbit: working groups of 3-4 – could ask for one or two examples Homework: instructor/TA scan answers and provides feedback Medium size class 40-100 – Tidbit: working groups of 3-4 – ask for one or two different answers Homework: instructor/TA scans answers and provide feedback Large class 100 + Tidbit: working groups of 2-5 students seated close to each other – ask for 1-3 volunteers, especially that have different answers. Homework: have peer groups score the responses and rank them