The genomic profiling and MAMLD1 expression in human and canines with Cushing's disease

Andrew Wang, Stewart G Neill, Scott Newman, Marianna A Tryfonidou, Adriana Ioachimescu, Michael R Rossi, Björn P Meij, Nelson M Oyesiku

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Background: Cushing’s disease (CD) is defined as hypercortisolemia caused by adrenocorticotropic hormone (ACTH)-secreting pituitary adenomas (corticotroph PA) that afflicts humans and dogs. In order to map common aberrant genomic features of CD between humans and dogs, we performed genomic sequencing and immunostaining on corticotroph PA. Methods: For inclusion, humans and dog were diagnosed with CD. Whole exome sequencing (WES) was conducted on 6 human corticotroph PA. Transcriptome RNA-Seq was performed on 6 human and 7 dog corticotroph PA. Immunohistochemistry (IHC) was complete on 31 human corticotroph PA. Corticotroph PA were compared with normal tissue and between species analysis were also performed. Results: Eight genes (MAMLD1, MNX1, RASEF, TBX19, BIRC5, TK1, GLDC, FAM131B) were significantly (P < 0.05) overexpressed across human and canine corticotroph PA. IHC revealed MAMLD1 to be positively (3+) expressed in the nucleus of ACTH-secreting tumor cells of human corticotroph PA (22/31, 70.9%), but absent in healthy human pituitary glands. Conclusions: In this small exploratory cohort, we provide the first preliminary insights into profiling the genomic characterizations of human and dog corticotroph PA with respect to MAMLD1 overexpression, a finding of potential direct impact to CD microadenoma diagnosis. Our study also offers a rationale for potential use of the canine model in development of precision therapeutics.

    Original languageEnglish
    Article number185
    Pages (from-to)1-11
    Number of pages11
    JournalBMC Endocrine Disorders
    Volume21
    Issue number1
    DOIs
    Publication statusPublished - Dec 2021

    Keywords

    • Cushing’s disease
    • Dog and man sequencing
    • MAMLD1
    • Pituitary adenomas

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