After completing proof of concept testing with polystyrene beads and with the goal of creating a SARS-CoV-2 sensor (Discussed in this post: https://trace-bmps.org/beadazzled-laying-the-foundation-of-the-%ce%bcsim-dx-fouling-based-sensor/), we sought to test the performance of the system with a target more similar to the SARS-CoV-2…
Category: NRG
Vindictive Virus Capture: Testing the μSiM-DX with Vaccinia Virus Towards a Modular Virus Diagnostic
Beadazzled: Laying the Foundation of the μSiM-DX Fouling-based Sensor
Starting in December of 2019, we began capturing fluorescent beads on microslit silicon nanomembranes as an illustrative representation of particle capture within our microfluidic devices. From then until now we have successfully used this method within gasket made TFAC devices…
Theoretical Underpinnings of Small Molecule Permeability Measurements in the µSiM (Part 4: Sampling)**
Introduction In addition to in situ measurements of small molecule permeability (Parts 1, 2 and 3), we wish to enable an assessment of permeability by sampling from the abluminal chamber of the µSiM in a manner similar to what is…
Affinity Based Capture of Streptavidin Conjugated EVs
Introduction Proliferation, invasion and metastasis of cancer cells require bidirectional cell-cell communication. Cell-cell communication involves the secretion of oncoproteins, mRNAs, RNAs and DNA fragments by cancer cells. The particles that get secreted by these cancer cells are encapsulated in extracellular…
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Theoretical Underpinnings of Small Molecule Permeability Measurements in the µSiM (Part 3: Application to Cell Barriers)*
This is the third installment in a series of posts focused on the development of a method for measuring barrier permeability in the µSiM. In Part 1 we discussed the goal of making these measurements in situ at a position…
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hiPSC Differentiation to Endothelial Cell Culture Method, Brain Microvascular Endothelial Cells (EECM-BMEC-like cells), Round 2
Introduction This post highlights results from my second attempt to differentiate hiPSCs into endothelial progenitor cells EECM-BMEC-like cells in our lab. For details on methodology, see Nishihara et al., FASEB, 2020 and my previous post. Methods Cells were seeded at 70,000 and 100,000…
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Basement Membrane Disruption by Tumor Necrosis Factor-α in the μSiM-hNVU
Note: a postscript regarding an assay to determine the activity of our MMP-2/MMP-9 inhibitor was added to this post on June 14, 2021. Introduction The blood-brain barrier (BBB) plays an important role in maintaining brain chemistry by restricting the permeability…
Electrospinning aligned polymeric fibers on parylene stencils: cell culture and pll-g-PEG coating update
A quick recap of the goals and initial experiments: https://trace-bmps.org/electrospinning-aligned-polymeric-fibers-on-parylene-stensils/ After obtaining a reproducible optimized fiber deposition settings and an improved device design, we moved on to growing HUVECs on these devices as the next step. As previously stated, given…
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