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Cancer tissues showed weak to moderate cytoplasmic staining. Rare cases of melanoma, breast, endometrial, liver, urothelial, stomach and pancreatic cancers displayed strong positivity. Few cases of renal cancers displayed additional membranous immunoreactivity. Several cases of gliomas, lymphomas and skin cancers were negative.
Cases of ductal breast carcinomas, prostate, urothelial and endometrial cancers exhibited strong cytoplasmic immunoreactivity. A majority of malignant lymphomas and gliomas were weakly stained.
GENE INFORMATION
Gene name
RAB1B
Synonyms
Description
RAB1B, member RAS oncogene family (HGNC Symbol)
Entrez gene summary
Members of the RAB protein family, such as RAB1B, are low molecular mass monomeric GTPases localized on the cytoplasmic surfaces of distinct membrane-bound organelles. RAB1B functions in the early secretory pathway and is essential for vesicle transport between the endoplasmic reticulum (ER) and Golgi (Chen et al., 1997 [PubMed 9030196]; Alvarez et al., 2003 [PubMed 12802079]).[supplied by OMIM, Jan 2009]