Association between beta 2 adrenergic receptor genetic polymorphisms and
salbutamol responsiveness in asthmatic patients: a meta-analysis
Abstract
Aim: There are inter-individual variations in the impact of the Beta-2
adrenergic receptor (ADRB2) polymorphisms on salbutamol response in
asthmatic patients. We performed this meta-analysis to investigate the
relationship between ADRB2 Arg16Gly and Gln27Glu polymorphisms and
salbutamol responsiveness. Methods: Eight cyber databases (PubMed,
EMbase, Web of Science, The Cochrane Library, CBM, CNKI, WanFang Date
and VIP) were searched to select eligible studies until August 2020.
Odds ratio (OR) and 95% confidence interval (CI) were calculated to
assess the strength of the association. Results: According to the
inclusion and exclusion criteria, eight studies involving 894 patients
were recruited. There was a clear relationship between the Arg16Gly
polymorphism and salbutamol response [AG vs. AA: OR=1.470, 95%CI
(1.046, 2.066), P=0.026; GG+AA vs. AG: OR=0.668, 95%CI (0.502, 0.889),
P=0.006]. Stratified analysis by age revealed significant association
in adult asthmatics [AG vs. AA: OR=1.894, 95%CI (1.262, 2.843),
P=0.002; GG+AA vs. AG: OR=0.597, 95%CI (0.426, 0.837), P=0.003].
Caucasian and Asian patients with the AG genotype showed a good response
to salbutamol compared to those with the GG+AA or AA genotypes,
respectively. However, the association among the Gln27Glu polymorphism
and salbutamol response was not significant. Conclusions: The findings
suggest that the ADRB2 gene Arg16Gly polymorphism may predict salbutamol
responsiveness in asthmatic patients. The patients with the AG genotype
are likely to show a greater response to salbutamol in comparison to
those with the AA or GG+AA genotypes, especially in adult asthmatics.
There may be no association between the Gln27Glu polymorphism and
salbutamol response.