RGD Reference Report - Bad and Bid - potential background players in preneoplastic to neoplastic shift in human endometrium. - Rat Genome Database

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Bad and Bid - potential background players in preneoplastic to neoplastic shift in human endometrium.

Authors: Driak, D  Dvorska, M  Bolehovska, P  Svandova, I  Novotny, J  Halaska, M 
Citation: Driak D, etal., Neoplasma. 2014;61(4):411-5. doi: 10.4149/neo_2014_050.
RGD ID: 13432164
Pubmed: PMID:24645842   (View Abstract at PubMed)
DOI: DOI:10.4149/neo_2014_050   (Journal Full-text)

The most common malignancies of the female genital tract are endometrial carcinomas, whose are generally proceeded by hyperplasia. The maintenance of tissue homeostasis is to great extent governed by apoptosis, whose defects can lead to the preneoplastic and/or cancerous changes. Endometrial apoptosis involves among others three groups of proteins of the Bcl-2 family. First group contains anti-apoptotic proteins (e. g. Bcl-2, Bcl-xL). The other two groups belong to the pro-apoptotic proteins with three (e. g. Bax, Bak) or one (e. g. Bad, Bid) so-called BH domains. Bad and Bid trigger the oligomerization of Bak and Bax protein, which permeabilize the outer mitochondrial wall. Unlike Bid, Bad cannot directly trigger apoptosis. Instead, Bad lowers the threshold at which apoptosis is induced, by binding anti-apoptotic Bcl-2 proteins. However, their mutual counterbalance or synergism in the human endometrium has not been reported yet.In this study, the levels of Bid and Bad were measured using SDS-PAGE and Western blotting with specific antibodies, with the aim to analyse expression of Bid and Bad proteins in normal (NE), hyperplastic (HE) and cancerous (CE) endometrium. We demonstrated that Bid expression in CE reached only 47% and 50% of this observed in NE and HE. Conversely, Bad expression in HE reached only 40% and 36% of this observed in NE and CE, respectively. We detected no significant changes of Bid expression between HE and NE, and levels of Bad protein were not different between CE and NE.Trend of Bid and Bad protein expression is clearly opposite in HE and CE. We hypothesise that disrupted apoptotic program in CE seems to be reduced further by lowering levels of direct apoptotic trigger protein Bid. We suggest that the adenocarcinoma tissue of human endometrium thus tries to strengthen its apoptotic effort by lowering the apoptotic threshold via higher Bad levels.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
endometrial cancer disease progressionIAGP 13432164protein:altered expression:endometrium (human)RGD 
endometrial cancer disease progressionISOBAD (Homo sapiens)13432164; 13432164protein:altered expression:endometrium (human)RGD 

Objects Annotated

Genes (Rattus norvegicus)
Bad  (BCL2-associated agonist of cell death)

Genes (Mus musculus)
Bad  (BCL2-associated agonist of cell death)

Genes (Homo sapiens)
BAD  (BCL2 associated agonist of cell death)


Additional Information