Mayo Clinic Laboratory and Pathology Research Roundup: Dec. 17
The Research Roundup provides an overview of the past week’s research from Mayo Clinic Laboratories consultants, including featured abstracts and a complete list of published studies and reviews.
Featured Abstract
Phosphorylated RB Promotes Cancer Immunity by Inhibiting NF-κB Activation and PD-L1 Expression
Aberrant expression of programmed death ligand-1 (PD-L1) in tumor cells promotes cancer progression by suppressing cancer immunity. The retinoblastoma protein RB is a tumor suppressor known to regulate the cell cycle, DNA damage response, and differentiation. Mayo Clinic researchers demonstrated that RB interacts with nuclear factor κB (NF-κB) protein p65 and that their interaction is primarily dependent on CDK4/6-mediated serine-249/threonine-252 (S249/T252) phosphorylation of RB. RNA-seq analysis shows that a subset of NF-κB pathway genes, including PD-L1, are selectively upregulated by RB knockdown or CDK4/6 inhibitor. S249/T252-phosphorylated RB inversely correlates with PD-L1 expression in patient samples. Expression of an RB-derived S249/T252 phosphorylation-mimetic peptide suppresses radiotherapy-induced upregulation of PD-L1 and augments therapeutic efficacy of radiation in vivo. The findings reveal a previously unrecognized tumor suppressor function of hyperphosphorylated RB in suppressing NF-κB activity and PD-L1 expression and suggest that the RB-NF-κB axis can be exploited to overcome cancer immune evasion triggered by conventional or targeted therapies. The study was published in Molecular Cell.
Published to PubMed This Week
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- Clinical Validity Assessment of Genes Frequently Tested on Hereditary Breast and Ovarian Cancer Susceptibility Sequencing Panels
Genetics in Medicine - Primary Central Nervous System Vasculitis Mimicking Brain Tumor: Comprehensive Analysis of 13 Cases from a Single Institutional Cohort of 191 Cases
Journal of Autoimmunity - Predictors of Symptomatic Kidney Stone Recurrence after the First and Subsequent Episodes
Mayo Clinic Proceedings - High-Sensitivity Cardiac Troponin I Levels in Normal Pregnancy and When Complicated by Hypertension
American Journal of Medicine - Assessment of Test Performance and Potential for Environmental Contamination Associated with a Point-of-Care Molecular Assay for Group A Streptococcus in an End-User Setting
Journal of Clinical Microbiology
- KMT2A (MLL) Rearrangements Observed in Pediatric/Young Adult T-Lymphoblastic Leukemia/Lymphoma: A 10-Year Review from a Single Cytogenetic Laboratory
Genes, Chromosomes and Cancer
- Cloning, Function, and Localization of Human, Canine and Drosophila Zip10 (Slc39a10), a Zn2+ Transporter
American Journal of Physiology-Renal Physiology - Utility of Adjuvant Chemotherapy in Patients Receiving Surgery and Adjuvant Radiotherapy for Primary Treatment of Esthesioneuroblastoma
Head and Neck
- The Prognostic Significance of TERT Promoter Mutations in Meningioma: A Systematic Review and Meta-Analysis
Journal of Neuro-Oncology - Clearance Kinetics of the VGF-Derived Neuropeptide TLQP-21
Neuropeptides - Developing a Process for Returning Medically Actionable Genomic Variants to Latino Patients in a Federally Qualified Health Center
Public Health Genomics
- Clinical Validity Assessment of Genes Frequently Tested on Hereditary Breast and Ovarian Cancer Susceptibility Sequencing Panels
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