The invention discloses a noninvasive
exosome mRNA BRAF V600E
mutation Tag-PCR (Tag-
Polymerase Chain Reaction) detection method, which comprises the following steps: separating an
exosome sample from a
body fluid; the method comprises the following steps: by taking mRNA as a template, adding an exogenous
reference gene and a primer pair for detecting the exogenous
reference gene, and meanwhile, carrying out a first round of PCR amplification reaction by using a Tag-ARMS primer pair for specifically enriching
exosome mRNA BRAF
gene V600E
mutation so as to form a PCR product; a PCR product is used as a template, a
system without UNG
enzyme is used for amplification, a primer pair for detecting a
reference gene is added, a Tag primer pair for specifically enriching and detecting V600E
mutation of the human exosome mRNA BRAF
gene and a probe sequence are used at the same time, and then a second round of PCR amplification reaction is carried out; and judging the mutation state of the V600E site of the BRAF
gene of the mRNA of the exosome sample.