Related Experiment Video
Updated: Feb 2, 2026
09:18
Spheroid Assay to Measure TGF-β-induced Invasion
Published on: November 16, 2011
22.5K
Investigating TGF-β1-induced renal fibrosis in a parallel computational-experimental spheroid system
Kristin P Kim1, Abigail Brooks1, Christopher A Lemmon1
1Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia.
Biophysical Journal
|February 1, 2026
Summary
This study used computational models and 3D cell cultures to investigate renal fibrosis. Inhibiting fibronectin assembly effectively reduced tubular damage caused by transforming growth factor-beta 1.
Area of Science:
- Nephrology
- Computational Biology
- Cell Biology
Background:
- Epithelial-mesenchymal transition (EMT) and extracellular matrix (ECM) remodeling drive renal fibrosis.
- Transforming growth factor-beta 1 (TGF-β1) signaling, upregulated by fibronectin (FN) assembly, promotes chronic EMT and fibrosis.
- Traditional models struggle to study TGF-β1-FN crosstalk and 3D renal tubule organization in fibrosis.
Purpose of the Study:
- To develop and utilize a combined computational-in vitro approach to investigate TGF-β1-FN crosstalk in renal fibrosis.
- To model the spatial and temporal effects of TGF-β1-FN interactions on 3D tubular epithelial cell spheroids.
- To assess the therapeutic potential of inhibiting fibronectin assembly in renal fibrosis.
Main Methods:
- Developed an agent-based computational model (ABM) simulating renal fibrosis.
- Employed 3D renal epithelial cell spheroids for in vitro experiments.
- Investigated the effects of TGF-β1 stimulation and fibronectin assembly inhibition.
Main Results:
- The ABM accurately replicated tubular atrophy and ECM remodeling seen in renal fibrosis.
- ABM simulations predicted that inhibiting ECM assembly would prevent tubular atrophy and dilation.
- In vitro 3D spheroid experiments confirmed that inhibiting fibronectin assembly ameliorated TGF-β1-induced tubular dilation.
Conclusions:
- Combined computational and 3D in vitro models offer a powerful approach to study renal fibrosis.
- Inhibiting fibronectin assembly is a promising strategy to counteract TGF-β1-driven renal tubule damage.
- Targeting the TGF-β1-FN feedback loop may offer therapeutic benefits for renal fibrosis.
More Related Videos
Related Concept Videos
01:16TGF - β Signaling Pathway
10.5K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
10.5K
01:23Parallel Resonance
559
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
559
01:20Parallel Processing
719
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
719
01:23Resistors In Parallel
6.2K
Resistors are in parallel when one end of all the resistors are connected to a continuous wire of negligible resistance and the other end of all the resistors are also connected to one another through a continuous wire of negligible resistance. In the case of a parallel configuration, the potential drop across each resistor is the same. Current through each resistor can be found using Ohm’s law, I = V/R, where the voltage is constant across each resistor. The sum of the individual currents...
6.2K
01:23Cystic Fibrosis: Pathogenesis
871
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
871
01:14Series and Parallel Capacitors
9.4K
Capacitors, fundamental components in electronic circuits, can be connected in series and/or parallel configurations. Each configuration has different impacts on the overall behavior of the circuit.
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
9.4K