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Scientists Uncover Brain's Cold Pain Switch
2 Sep
Summary
- Researchers identified the brain circuit behind chemotherapy's cold pain side effect.
- The study focused on cold allodynia, a sensitivity to cold, not heat.
- Findings in mice may lead to future pharmacological treatments for humans.
A groundbreaking study by researchers from the Indian Institute of Science (IISc) and TCG-CREST has identified the specific brain circuit that causes "cold allodynia," a distressing side effect of chemotherapy. This condition leads to an abnormal sensitivity to cold temperatures, distinct from heat sensitivity, and is frequently associated with platinum-based chemotherapy drugs such as oxaliplatin. The findings were published in the journal Cell Reports.
The research, conducted using mice, revealed that chemotherapy can alter specific neural pathways in the brain, even after physical healing has occurred. Scientists traced these pathways, discovering a crucial change in the connection between the lateral parabrachial nucleus, located in the upper brainstem, and the parafascicular region of the thalamus. These brain areas are vital for processing pain signals and regulating bodily responses.
While direct experimentation on humans is not feasible due to invasive methods, the team is optimistic about translating these findings into treatments. Their next five-year plan involves exploring pharmacological interventions in mice to potentially reverse cold allodynia. This research aims to offer future relief for patients suffering from this chemotherapy-induced neuropathy and may also shed light on similar pain conditions arising from injuries or other causes.
