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The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.
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Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
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The kidneys are a pair of bean-shaped organs in the human body that play a critical role in maintaining overall health. They filter out waste products from the blood, regulate blood pressure, maintain electrolyte balance, and stimulate the production of red blood cells.
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Kidney-on-a-chip: untapped opportunities.

Nureddin Ashammakhi1, Katherine Wesseling-Perry2, Anwarul Hasan3

  • 1Division of Plastic Surgery, Department of Surgery, Oulu University Hospital, Oulu, Finland; Biotechnology Research Center, Libyan Authority for Research, Science and Technology, Tripoli, Libya.

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Summary

Organ-on-a-chip technology shows promise for kidney disease research and drug testing by mimicking nephron structures. However, fully recapitulating complex kidney functions and multi-component interactions remains a challenge.

Keywords:
kidneymicrofluidicsmicrophysiological systemsorgan-on-a-chiptissue engineering

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Area of Science:

  • Biomedical Engineering
  • Renal Physiology
  • Organ-on-a-Chip Technology

Background:

  • Organs-on-a-chip technology offers advanced in vitro and ex vivo tissue mimicry.
  • Significant progress has been made in applying this technology to kidney research and disease modeling.

Purpose of the Study:

  • To evaluate the potential of organs-on-a-chip technology in modeling renal physiology and disease.
  • To identify current limitations and future directions for kidney-on-a-chip development.

Main Methods:

  • Mimicking individual nephron components like the glomerulus and tubules using organs-on-a-chip.
  • Utilizing these models for ex vivo drug toxicity testing and exploring renal replacement therapies.

Main Results:

  • Successful in vitro recapitulation of key nephron structures, outperforming 2D cell systems.
  • Limitations identified in mimicking complex functions such as tubular secretion, metabolism, and hormone production.
  • Challenges persist in constructing multi-renal-component-on-a-chip models for integrated system analysis.

Conclusions:

  • Organs-on-a-chip models hold significant promise for advancing the study of normal and pathological renal physiology.
  • These models are valuable for predicting nephrotoxicity and improving treatments for chronic kidney diseases.
  • Further development is needed to fully integrate and functionalize multi-component renal systems on-chip.