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2016 ; 463
(ä): 32-38
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Next-generation sequencing of human opioid receptor genes based on a custom
AmpliSeq? library and ion torrent personal genome machine
#MMPMID27725223
Kringel D
; Lötsch J
Clin Chim Acta
2016[Dec]; 463
(ä): 32-38
PMID27725223
show ga
BACKGROUND: The opioid system is involved in the control of pain, reward,
addictive behaviors and vegetative effects. Opioids exert their pharmacological
actions through the agonistic binding at opioid receptors and variation in the
coding genes has been found to modulate opioid receptor expression or signaling.
However, a limited selection of functional opioid receptor variants is perceived
as insufficient in providing a genetic diagnosis of clinical phenotypes and
therefore, unrestricted access to opioid receptor genetics is required. METHODS:
Next-generation sequencing (NGS) workflow was based on a custom AmpliSeq? panel
and designed for sequencing of human genes related to the opioid receptor group
(OPRM1, OPRD1, OPRK1, SIGMA1, OPRL1) on an Ion PGM? Sequencer. A cohort of 79
previously studied chronic pain patients was screened to evaluate and validate
the detection of exomic sequences of the coding genes with 25 base pair exon
padding. In-silico analysis was performed using SNP and Variation Suite®
software. RESULTS: The amplicons covered approximately 90% of the target
sequence. A median of 2.54×10(6) reads per run was obtained generating a total of
35,447 nucleotide reads from each DNA sample. This identified approximately 100
chromosome loci where nucleotides deviated from the reference sequence GRCh37
hg19, including functional variants such as the OPRM1 rs1799971 SNP (118 A>G) as
the most scientifically regarded variant or rs563649 SNP coding for ?-opioid
receptor splice variants. Correspondence between NGS and Sanger derived
nucleotide sequences was 100%. CONCLUSION: Results suggested that the NGS
approach based on AmpliSeq? libraries and Ion PGM sequencing is a highly
efficient mutation detection method. It is suitable for large-scale sequencing of
opioid receptor genes. The method includes the variants studied so far for
functional associations and adds a large amount of genetic information as a basis
for complete analysis of human opioid receptor genetics and its functional
consequences.