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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(ä): 15840
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Insufficient antibody validation challenges oestrogen receptor beta research
#MMPMID28643774
Andersson S
; Sundberg M
; Pristovsek N
; Ibrahim A
; Jonsson P
; Katona B
; Clausson CM
; Zieba A
; Ramström M
; Söderberg O
; Williams C
; Asplund A
Nat Commun
2017[Jun]; 8
(ä): 15840
PMID28643774
show ga
The discovery of oestrogen receptor ? (ER?/ESR2) was a landmark discovery. Its
reported expression and homology with breast cancer pharmacological target ER?
(ESR1) raised hopes for improved endocrine therapies. After 20 years of intense
research, this has not materialized. We here perform a rigorous validation of 13
anti-ER? antibodies, using well-characterized controls and a panel of validation
methods. We conclude that only one antibody, the rarely used monoclonal PPZ0506,
specifically targets ER? in immunohistochemistry. Applying this antibody for
protein expression profiling in 44 normal and 21 malignant human tissues, we
detect ER? protein in testis, ovary, lymphoid cells, granulosa cell tumours, and
a subset of malignant melanoma and thyroid cancers. We do not find evidence of
expression in normal or cancerous human breast. This expression pattern aligns
well with RNA-seq data, but contradicts a multitude of studies. Our study
highlights how inadequately validated antibodies can lead an exciting field
astray.