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Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Correction: Komatsu et al. Three-Dimensional Visualization and Detection of the Pulmonary Venous-Left Atrium Connection Using Artificial Intelligence in Fetal Cardiac Ultrasound Screening. <i>Bioengineering</i> 2026, <i>13</i>, 100.

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Microdifferential Pressure Measurement Device for Cellular Microenvironments.

Mami Akaike1,2,3, Jun Hatakeyama2,3, Yoichi Saito4

  • 1Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.

Bioengineering (Basel, Switzerland)
|January 24, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel device to measure micropressure in embryos without electrical sensors. This tool quantifies cellular-scale pressure, crucial for understanding mechanical forces in biological development.

Keywords:
brain pressureembryomechanical forcemicrodifferential pressure sensormicroenvironment

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Area of Science:

  • Biophysics
  • Cell Biology
  • Developmental Biology

Background:

  • Mechanical forces are critical regulators of cellular processes, including proliferation, differentiation, and tissue development.
  • Accurate quantification of mechanical forces at the cellular level is essential for understanding their biological impact.

Purpose of the Study:

  • To introduce a novel microdifferential pressure measurement device for cellular-scale pressure assessments.
  • To enable precise, localized pressure evaluations within microcavities in living tissues.

Main Methods:

  • A microdifferential pressure measurement device was fabricated using a glass substrate, polydimethylsiloxane, polytetrafluoroethylene tubes, a glass capillary, and a microsyringe pump.
  • The device relies on the displacement of ultrapure water within a microchannel, obviating the need for electrical measurements.
  • Calibration established a linear relationship between pressure (P) and water displacement (dx) with the equation dx = 0.36 P (R² = 0.87).

Main Results:

  • The device demonstrated a linear response to applied pressure with a coefficient of determination of 0.87.
  • The fabricated device successfully measured brain ventricular pressure in mouse embryos, yielding an average reading of 1313 ± 640 Pa.

Conclusions:

  • The novel device provides a non-electrical method for measuring micropressure in biological systems.
  • This technology facilitates localized pressure measurements within microcavities, aiding research in developmental biology and tissue engineering.