Modeling chemotherapy-induced peripheral neuropathy using a Nerve-on-a-chip microphysiological system
Organ-on-a-chip devices that mimic in vivo physiology have the potential to identify effects of chemical and drug exposure in early preclinical stages of drug development while relying less heavily on animal models. We have designed a hydrogel rat nerve-on-a-chip (RNoaC) construct that promotes axon...
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Published in | ALTEX, alternatives to animal experimentation Vol. 37; no. 3; p. 350 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
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Germany
Springer Spektrum
01.01.2020
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Abstract | Organ-on-a-chip devices that mimic in vivo physiology have the potential to identify effects of chemical and drug exposure in early preclinical stages of drug development while relying less heavily on animal models. We have designed a hydrogel rat nerve-on-a-chip (RNoaC) construct that promotes axon growth analogous to mature nerve anatomy and is the first 3D in vitro model to collect electrophysiological and histomorphic metrics that are used to assess in vivo pathophysiology. Here we culture embryonic rat dorsal root ganglia (DRG) in the construct to demonstrate its potential as a preclinical assay for screening implications of nerve dysfunction in chemotherapy-induced peripheral neuropathy (CIPN). RNoaC constructs containing DRG explants from E15 rat pups were exposed to common chemotherapeutics: bortezomib, oxaliplatin, paclitaxel, or vincristine. After 7 days of treatment, axons were electrically stimulated to collect nerve conduction velocity (NCV) and the peak amplitude (AMP), which are two clinical electrophysiological metrics indicative of healthy or diseased populations. We observed decreased NCV and AMP in a dose-dependent manner across all drugs. At high drug concentrations, NCV and AMP were lower than control values by 10-60%. Histopathological analysis revealed that RNoaC exhibit hallmarks of peripheral neuropathy. IC50 values calculated from dose-response curves indicate significant decrease in function occurs before decrease in viability. Our data suggest electrophysiology recordings collected from our RNoaC platform can closely track subtle pathological changes in nerve function. The ability to collect clinically relevant data from RNoaCs suggests it can be an effective tool for in vitro preclinical screening of peripheral neuropathy. |
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AbstractList | Organ-on-a-chip devices that mimic in vivo physiology have the potential to identify effects of chemical and drug exposure in early preclinical stages of drug development while relying less heavily on animal models. We designed a hydrogel rat nerve-on-a-chip (RNoaC) construct that promotes axon growth analogous to mature nerve anatomy and is the first 3D in vitro model to collect electrophysiological and histomorphic metrics to assess in vivo pathophysiology. Here we culture embryonic rat dorsal root ganglia (DRG) in the construct to demonstrate its potential to screen for implications of nerve dysfunction in chemotherapy-induced peripheral neuropathy (CIPN). RNoaC constructs containing DRG explants from E15 rat pups were exposed to the chemotherapeutics bortezomib, oxaliplatin, paclitaxel or vincristine for 7 days. Then, axons were electrically stimulated to collect nerve conduction velocity (NCV) and peak amplitude (AMP), which are clinical electrophysiological metrics indicative of healthy or diseased populations. All chemotherapeutics decreased NCV and AMP in a concentration-dependent manner. At high drug concentrations, NCV and AMP were 10-60% lower than control values. Histopathological analysis revealed hallmarks of peripheral neuropathy. [IC.sub.50] values calculated from concentration-response curves indicate that the significant decrease in function occurred before a decrease in viability. Our data suggest that electrophysiology recordings collected from our RNoaC platform can closely track subtle pathological changes in nerve function. The ability to collect clinically relevant data from RNoaC suggests it can be an effective tool for in vitro preclinical screening for peripheral neuropathy. Organ-on-a-chip devices that mimic in vivo physiology have the potential to identify effects of chemical and drug exposure in early preclinical stages of drug development while relying less heavily on animal models. We have designed a hydrogel rat nerve-on-a-chip (RNoaC) construct that promotes axon growth analogous to mature nerve anatomy and is the first 3D in vitro model to collect electrophysiological and histomorphic metrics that are used to assess in vivo pathophysiology. Here we culture embryonic rat dorsal root ganglia (DRG) in the construct to demonstrate its potential as a preclinical assay for screening implications of nerve dysfunction in chemotherapy-induced peripheral neuropathy (CIPN). RNoaC constructs containing DRG explants from E15 rat pups were exposed to common chemotherapeutics: bortezomib, oxaliplatin, paclitaxel, or vincristine. After 7 days of treatment, axons were electrically stimulated to collect nerve conduction velocity (NCV) and the peak amplitude (AMP), which are two clinical electrophysiological metrics indicative of healthy or diseased populations. We observed decreased NCV and AMP in a dose-dependent manner across all drugs. At high drug concentrations, NCV and AMP were lower than control values by 10-60%. Histopathological analysis revealed that RNoaC exhibit hallmarks of peripheral neuropathy. IC50 values calculated from dose-response curves indicate significant decrease in function occurs before decrease in viability. Our data suggest electrophysiology recordings collected from our RNoaC platform can closely track subtle pathological changes in nerve function. The ability to collect clinically relevant data from RNoaCs suggests it can be an effective tool for in vitro preclinical screening of peripheral neuropathy. |
Audience | Academic |
Author | Jacobs, Elizabeth Sharma, Anup D Curley, J Lowry McCoy, Laurie Nguyen, Hieu T Moore, Michael J Kramer, Liana |
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Title | Modeling chemotherapy-induced peripheral neuropathy using a Nerve-on-a-chip microphysiological system |
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