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Published on: February 22, 2019
microRNA and Pain
Atsushi Sakai1, Hidenori Suzuki2
1Department of Pharmacology, Graduate School of Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8602, Japan. sa19@nms.ac.jp.
Abstract:
Pain is an important protective system that alerts organisms to actual or possible tissue damage. However, a variety of pathologies can lead to chronic pain that is no longer beneficial. Lesions or diseases of the somatosensory nervous system cause intractable neuropathic pain that occasionally lasts even after the original pathology subsides. Chronic inflammatory diseases like arthritis are also associated with severe pain. Because conventional analgesics such as non-steroidal anti-inflammatory drugs and opioids have limited efficacy and/or severe adverse events associated with long-term use, chronic pain remains a major problem in clinical practice. Recently, causal roles of microRNAs in chronic pain and their therapeutic potential have been emerging. microRNA expressions are altered not only at the primary origin of pain, but also along the somatosensory pathways. Notably, microRNA expressions are differentially affected depending on the causes of chronic pain. This chapter summarizes current insights into the roles of microRNAs in pain based on the underlying pathologies.
Insights
MicroRNAs play a key role in chronic pain conditions like neuropathic pain and arthritis. Understanding microRNA alterations offers new therapeutic targets for pain management beyond conventional drugs.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Chronic pain, including neuropathic pain and arthritis, is a significant clinical challenge.
- Existing analgesics (NSAIDs, opioids) have limitations in efficacy and safety for long-term use.
- MicroRNAs (miRNAs) are increasingly recognized for their involvement in pain pathways.
Purpose of the Study:
- To summarize the current understanding of microRNA roles in various chronic pain conditions.
- To explore the therapeutic potential of targeting microRNAs for pain management.
- To highlight how miRNA expression varies with pain etiology.
Main Methods:
- Review of scientific literature on microRNAs and pain.
- Analysis of miRNA expression patterns in different chronic pain models.
- Correlation of miRNA alterations with specific pain pathologies.
Main Results:
- MicroRNA expression is altered at pain origins and along somatosensory pathways.
- Differential miRNA expression is observed depending on the cause of chronic pain.
- MicroRNAs represent promising targets for novel pain therapies.
Conclusions:
- MicroRNAs are critically involved in the development and maintenance of chronic pain.
- Targeting specific microRNAs could offer new avenues for treating intractable pain.
- Further research into miRNA-based therapeutics is warranted for effective pain management.
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