LungChip.com

The 2010 origin: an alveolus that breathes

The phrase lung-on-a-chip comes from a 2010 paper in Science from the Wyss Institute at Harvard University.1 The device is a clear, flexible polymer block about the size of a USB memory stick.3 Two parallel microchannels run through it, separated by a thin, porous, stretchable membrane. Human alveolar epithelial cells grow on top with air above them; human microvascular endothelial cells line the underside with medium flowing past. Vacuum chambers on either side pull the membrane in a steady rhythm, so both cell layers stretch and relax with each simulated breath.2

That pairing of an air-liquid interface with cyclic strain is what separates a lung chip from a dish of lung cells. The 2010 study showed the tissue responding to bacteria and inflammatory signals as an organ would, and that breathing motion increased nanoparticle uptake and passage into the vascular channel.1 Its abstract already uses the phrase organ-on-a-chip; a 2013 protocol paper adapts the same design to the gut.2

What the model reproduces

Designs differ, but lung-on-a-chip devices share four targets:

• The alveolar-capillary interface. Two living human cell layers, epithelial and endothelial, in contact across a membrane thin enough for signals and particles to cross.1
• Breathing motion. Cyclic stretch from side vacuum chambers,2 or a micro-diaphragm in a 2015 array from the University of Bern. Stretch alone changes barrier permeability and cytokine release.6
• An air-liquid interface. Air on the epithelial side, medium on the vascular side. Airway chips grown this way develop a mucociliary epithelium.7
• Flow and immune cells. Medium moving through the vascular channel and, in newer designs, circulating immune cells;9 a 2025 immune-competent lung-on-a-chip models severe influenza this way.8

Small-airway and bronchial-airway chips sit alongside alveolar chips, and lung chip is the plain umbrella word for all of them.

What lung chips are used for

The published uses map onto what a buyer of LungChip.com might offer:

• Inhalation toxicology. The original study was a nanotoxicology experiment: breathing strain made the response to silica nanoparticles more toxic and inflammatory.1
• Drug safety. A 2012 lung-on-a-chip reproduced the pulmonary edema seen in cancer patients treated with interleukin-2, at similar doses and over the same time frame.5
• Infection and antivirals. An airway chip modelled influenza A and pseudotyped SARS-CoV-2 infection and was used to compare candidate antivirals.9
• Disease models. Small-airway chips reproduced asthma-like goblet cell changes after IL-13 exposure and, lined with cells from people with COPD, that disease's heightened inflammation.7
• Transport across the barrier. With each channel separately accessible, the chip measures what crosses from air to blood.1
• Reducing animal use. The NIH tissue-chip program frames organs-on-chips as human-cell devices for predicting drug safety with fewer animals,10 and a European Commission Joint Research Centre review of respiratory disease models lists microfluidic lung-on-a-chip systems among 284 promising non-animal methods.11

The regulatory context: organ chips, named in law

For decades United States drug law spoke of "preclinical tests (including tests on animals)". The FDA Modernization Act 2.0, enacted as Section 3209 of the Consolidated Appropriations Act, 2023 and signed on 29 December 2022, struck that phrase from Section 505 of the Federal Food, Drug, and Cosmetic Act and replaced it with "nonclinical tests".12 The definition covers in vitro, in silico, in chemico and nonhuman in vivo tests, which "may include" cell-based assays, "organ chips and microphysiological systems", computer modeling, bioprinting and animal tests.12 Animal tests stay on the list; what changed is that organ chips are now named in the statute.

The FDA's April 2025 roadmap for reducing animal testing in preclinical safety studies names organ-on-a-chip systems among the new approach methodologies it intends to validate, starting with monoclonal antibodies.13 Its ISTAND program accepts tissue chips and microphysiological systems as drug development tools for qualification.14 A May 2025 GAO assessment is the sober counterpoint: organ chips "cannot replace animal testing but may be used alongside animals" today, citing shortages of good human cells, validation studies and shared data.4 In Europe, Directive 2010/63/EU already requires a scientifically satisfactory non-animal method wherever one exists and names full replacement as the final goal.15

Who builds around the name

Who gathers around lung-on-a-chip work is a fair picture of who might want LungChip.com:

• Organ-chip and microphysiological-system developers, who need a product name a customer can say on a call.
• Contract research and inhalation-toxicology laboratories offering nonclinical testing on human lung models, now a named category in United States law.12
• Respiratory disease and infection groups modelling asthma, COPD, influenza and other airway conditions.7
• Suppliers of primary lung cells, media and air-liquid-interface consumables, the input every chip depends on.4
• Societies, conferences and courses. The European Organ-on-Chip Society launched in November 2018 with an annual conference,16 and the MPS World Summit has met yearly since 2022.17

Lung chip, lung-on-a-chip, lung-on-chip

Journals write lung-on-a-chip. The statute says "organ chips and microphysiological systems".12 NIH says tissue chips.10 In conversation everyone shortens it to lung chip, and that is the form this domain holds. LungChip.com reads correctly under every spelling: it is what people already say.

1. Huh D et al. Reconstituting organ-level lung functions on a chip.Science, 2010
2. Huh D et al. Microfabrication of human organs-on-chips.Nature Protocols, 2013
3. Human Organs-on-Chips.Wyss Institute at Harvard University
4. Human Organ-on-a-Chip (Technology Assessment GAO-25-107335).U.S. Government Accountability Office, May 2025
5. Huh D et al. A human disease model of drug toxicity-induced pulmonary edema in a lung-on-a-chip microdevice.Science Translational Medicine, 2012
6. Stucki AO et al. A lung-on-a-chip array with an integrated bio-inspired respiration mechanism.Lab on a Chip, 2015
7. Benam KH et al. Small airway-on-a-chip enables analysis of human lung inflammation and drug responses in vitro.Nature Methods, 2016
8. Ringquist R et al. An immune-competent lung-on-a-chip for modelling the human severe influenza infection response.Nature Biomedical Engineering, 2025
9. Si L et al. A human-airway-on-a-chip for the rapid identification of candidate antiviral therapeutics and prophylactics.Nature Biomedical Engineering, 2021
10. Tissue Chip for Drug Screening.NIH National Center for Advancing Translational Sciences
11. Hynes J et al. Advanced Non-animal Models in Biomedical Research: Respiratory Tract Diseases.European Commission Joint Research Centre, EUR 30334 EN, 2020
12. Consolidated Appropriations Act, 2023, Public Law 117-328, Section 3209 (Animal testing alternatives): the FDA Modernization Act 2.0.Approved 29 December 2022; 136 Stat. 5821-5822
13. Roadmap to Reducing Animal Testing in Preclinical Safety Studies.U.S. Food and Drug Administration, April 2025
14. Innovative Science and Technology Approaches for New Drugs (ISTAND) Program.U.S. Food and Drug Administration
15. Directive 2010/63/EU on the protection of animals used for scientific purposes, Article 4.European Parliament and Council, 2010
16. European Organ-on-Chip Society launched.ETPN news, 13 November 2018
17. Past MPS events.MPS World Summit, International MPS Society