Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=29151870
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\29151870
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Evol+Appl
2017 ; 10
(8
): 784-791
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Elevated mitochondrial genome variation after 50 generations of radiation
exposure in a wild rodent
#MMPMID29151870
Baker RJ
; Dickins B
; Wickliffe JK
; Khan FAA
; Gaschak S
; Makova KD
; Phillips CD
Evol Appl
2017[Sep]; 10
(8
): 784-791
PMID29151870
show ga
Currently, the effects of chronic, continuous low dose environmental irradiation
on the mitochondrial genome of resident small mammals are unknown. Using the bank
vole (Myodes glareolus) as a model system, we tested the hypothesis that
approximately 50 generations of exposure to the Chernobyl environment has
significantly altered genetic diversity of the mitochondrial genome. Using deep
sequencing, we compared mitochondrial genomes from 131 individuals from reference
sites with radioactive contamination comparable to that present in northern
Ukraine before the 26 April 1986 meltdown, to populations where substantial
fallout was deposited following the nuclear accident. Population genetic
variables revealed significant differences among populations from contaminated
and uncontaminated localities. Therefore, we rejected the null hypothesis of no
significant genetic effect from 50 generations of exposure to the environment
created by the Chernobyl meltdown. Samples from contaminated localities exhibited
significantly higher numbers of haplotypes and polymorphic loci, elevated genetic
diversity, and a significantly higher average number of substitutions per site
across mitochondrial gene regions. Observed genetic variation was dominated by
synonymous mutations, which may indicate a history of purify selection against
nonsynonymous or insertion/deletion mutations. These significant differences were
not attributable to sample size artifacts. The observed increase in mitochondrial
genomic diversity in voles from radioactive sites is consistent with the
possibility that chronic, continuous irradiation resulting from the Chernobyl
disaster has produced an accelerated mutation rate in this species over the last
25 years. Our results, being the first to demonstrate this phenomenon in a wild
mammalian species, are important for understanding genetic consequences of
exposure to low-dose radiation sources.