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Amyotrophic Lateral Sclerosis (ALS) is a muscle-bone degenerative disease, which lacks a specific index for diagnosis. In our previous studies, we found that exosomes mediated the interaction mechanism between muscle and bone at the cellular level, and myoblast exosomes can transfer miR-27a-3p to promote osteoblast mineralization. Therefore, we suppose that the expression of miR-27a-3p in the serum exosomes of ALS patients also changes. In this study, we used healthy human serum as a sample to find out the conditions and methods for extraction and detection. Then through comparison of the expression of miR-27a-3p in the serum exosomes of 10 ALS patients and healthy subjects, we found that in the ALS patients miR-27a-3p was down-regulated, and may be involved in the development of ALS, and therefore has potential as a reference for the diagnosis of ALS in the clinic.

Comparison of the extraction and determination of serum exosome and miRNA in serum and the detection of miR-27a-3p in serum exosome of ALS patients