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2015 ; 25
(11
): 1646-55
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Comparison against 186 canid whole-genome sequences reveals survival strategies
of an ancient clonally transmissible canine tumor
#MMPMID26232412
Decker B
; Davis BW
; Rimbault M
; Long AH
; Karlins E
; Jagannathan V
; Reiman R
; Parker HG
; Drögemüller C
; Corneveaux JJ
; Chapman ES
; Trent JM
; Leeb T
; Huentelman MJ
; Wayne RK
; Karyadi DM
; Ostrander EA
Genome Res
2015[Nov]; 25
(11
): 1646-55
PMID26232412
show ga
Canine transmissible venereal tumor (CTVT) is a parasitic cancer clone that has
propagated for thousands of years via sexual transfer of malignant cells. Little
is understood about the mechanisms that converted an ancient tumor into the
world's oldest known continuously propagating somatic cell lineage. We created
the largest existing catalog of canine genome-wide variation and compared it
against two CTVT genome sequences, thereby separating alleles derived from the
founder's genome from somatic mutations that must drive clonal transmissibility.
We show that CTVT has undergone continuous adaptation to its transmissible
allograft niche, with overlapping mutations at every step of immunosurveillance,
particularly self-antigen presentation and apoptosis. We also identified
chronologically early somatic mutations in oncogenesis- and immune-related genes
that may represent key initiators of clonal transmissibility. Thus, we provide
the first insights into the specific genomic aberrations that underlie CTVT's
dogged perseverance in canids around the world.