Regeneration Polarity
Regeneration Polarity - Related Videos
01:01
Group Polarization
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2020
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition. The phenomenon of group polarization explains many actions taken by groups that would not...
03:37
Molecular Shape and Polarity
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2020
Dipole Moment of a Molecule Polar covalent bonds connect two atoms with differing electronegativities, leaving one atom with a partial positive charge (δ+) and the other atom with a partial negative charge (δ–), as the electrons are pulled toward the more electronegative atom. This separation of charge gives rise to a bond dipole moment. The magnitude of a bond dipole moment is represented by the Greek letter mu (µ) and is given by the formula shown here, where Q is the magnitude of the...
09:14
An Introduction to Aging and Regeneration
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2023
Tissues are maintained through a balance of cellular aging and regeneration. Aging refers to the gradual loss of cellular function, and regeneration is the repair of damaged tissue generally mediated by preexisting adult or somatic stem cells. Scientists are interested in understanding the biological mechanisms behind these two complex processes. By doing so, researchers may be able to use somatic stem cells to treat degenerative diseases and develop therapies that could delay the effects of...
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Cited by 2 •
2016
A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.
06:56
A System for Culturing Iris Pigment Epithelial Cells to Study Lens Regeneration in Newt
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Cited by 7 •
2011
In newt, the lens regenerates always from the dorsal iris by transdifferentiation of the iris pigmented epithelial cells (IPEs). Here we describe a procedure to culture dorsal and ventral newt IPE cells and their implantation to the newt eye. The implanted cells are then studied by tissue sectioning and immunohistochemistry.
FAQs
They provide positional information that cells can interpret after injury. Signals from surrounding tissues help establish body axes, such as head-to-tail or proximal-to-distal orientation, while bioelectric cues contribute additional spatial information. Together, these inputs guide cells toward location-specific growth programs, helping a wound produce the structure appropriate to its position rather than an arbitrary replacement.
Polarity links the location of an injury to the identity of the structure that develops there. Cells do not respond to damage only by increasing growth; they also use positional information to activate region-specific programs. This coordination explains how repair can produce distinct, properly oriented body structures instead of undirected tissue accumulation.
Body axes give regenerating tissues a spatial framework for interpreting where new structures belong. Head-to-tail and proximal-to-distal information can distinguish one positional region from another, allowing cells to adopt corresponding identities during repair. Establishing these axes therefore connects positional cues with pattern formation, ensuring that growth follows an organized orientation.
The surrounding tissue is a major source of information because injured cells interpret local signaling gradients and bioelectric cues. Differences in these cues can alter which axis is established and which growth program becomes active. As a result, the local positional environment influences whether regeneration produces one structure, another structure, or the appropriate orientation of the replacement.
Researchers can examine how wounds in organisms such as planarians, salamanders, and hydra produce different structures and orientations. Comparing the repair response across these models helps reveal how cells coordinate positional identity, pattern formation, and growth. These organisms provide complementary biological contexts for investigating the signals that organize regeneration after injury.
A successful polarity response is reflected in the identity and orientation of the structure that regrows. The outcome should correspond to the injured region and align with an established body axis, rather than appearing as nonspecific tissue. Observing these location-specific structures helps connect positional information with the resulting pattern of regeneration.
Regenerative medicine seeks to understand how repair can be guided toward the correct tissue structure, not merely toward additional growth. Knowledge of polarity identifies positional information, signaling gradients, and bioelectric cues as relevant factors in that goal. This perspective may inform efforts to guide tissue repair or engineer replacement structures with appropriate organization.
The topic connects injury repair with fundamental questions about how cells acquire identity and coordinate growth during pattern formation. Studies in planarians, salamanders, and hydra show that regeneration can reveal principles shared with developmental biology. These findings provide scientific context for understanding how positional information organizes complex structures after tissue loss.