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Liu I, Jiang L, Samuelsson E, Marco Salas S, Hack O, Jeong D, Shaw M, Englinger B, LaBelle J, Ernst K, Palova H, Pokorna P, Sterba J, Slaby O, Geyeregger R, Jones D, Koschmann C, Svedlund J, Resnick A, Diaz A, Haberler C, Czech T, Slavc I, Cotter J, Ligon K, Alexandrescu S, Yung W, Arrillaga-Romany I, Suva M, Beck A, Gojo J, Monje M, Nilsson M, Filbin M. JS04.6.A The landscape of tumor cell states and spatial organization in H3-K27M mutant diffuse midline glioma across age and location. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Histone 3 lysine27-to-methionine mutations (H3-K27M) frequently occur in childhood diffuse midline gliomas (DMGs) of the pons, thalamus and spinal cord, presumed to be driven by the specific spatiotemporal context of these midline locations during postnatal development. While most common in the pons and at mid-childhood ages, the same oncohistone mutation is recurrently detected in adult DMGs and throughout different midline regions. The potential heterogeneity of tumors at different ages and in different anatomical locations of the midline are vastly understudied.
Material and Methods
Through dissecting the transcriptomic, epigenomic and spatial architectures of a comprehensive cohort of patient H3-K27M DMGs - spanning the age range from 2-68 years and locations from spinal cord to thalamus - at single cell resolution, we delineate how age- and location-dependent contexts shape glioma cell-intrinsic and -extrinsic features in light of the shared driver mutation.
Results
We identify that oligodendrocyte precursor (OPC)-like cells constitute the stem-like compartment in H3-K27M DMGs across all clinico-anatomical groups, however, depending on location, display varying levels of maturity resembling less differentiated pre-OPCs or more mature OPCs further differentiated along the oligodendroglial lineage. We further demonstrate increased mesenchymal cell states in adult tumors, which we link to age-related differences in glioma-associated immune cell compartments. We for the first time resolve the spatial organization of H3-K27M DMG cell types in intact patient tissues, identifying a local niche of the oligodendroglial lineage.
Conclusion
Our study provides a powerful resource for rational modeling and therapeutic frameworks taking into account determinants of age and location in this lethal glioma group.
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Affiliation(s)
- I Liu
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - L Jiang
- Dana-Farber Cancer Institute , Boston, MA , United States
| | | | | | - O Hack
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - D Jeong
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - M Shaw
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - B Englinger
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - J LaBelle
- Dana-Farber Cancer Institute , Boston, MA , United States
| | | | - H Palova
- Masaryk University , Brno , Czech Republic
| | - P Pokorna
- Masaryk University , Brno , Czech Republic
| | - J Sterba
- Masaryk University , Brno , Czech Republic
| | - O Slaby
- Masaryk University , Brno , Czech Republic
| | | | | | - C Koschmann
- University of Michigan , Ann Arbor, MI , United States
| | - J Svedlund
- Stockholm University , Stockholm , Sweden
| | - A Resnick
- Children's Hospital of Philadelphia , Philadelphia, PA , United States
| | - A Diaz
- UCSF , San Francisco, CA , United States
| | - C Haberler
- Medical University of Vienna , Vienna , Austria
| | - T Czech
- Medical University of Vienna , Vienna , Austria
| | - I Slavc
- Medical University of Vienna , Vienna , Austria
| | - J Cotter
- University of Southern California , Los Angeles, CA , United States
| | - K Ligon
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - S Alexandrescu
- Dana-Farber Cancer Institute , Boston, MA , United States
| | - W Yung
- MD Anderson Cancer Center , Houston, TX , United States
| | | | - M Suva
- MGH , Boston, MA , United States
| | | | - J Gojo
- Medical University of Vienna , Vienna , Austria
| | - M Monje
- Stanford University , Stanford, CA , United States
| | - M Nilsson
- Stockholm University , Stockholm , Sweden
| | - M Filbin
- Dana-Farber Cancer Institute , Boston, MA , United States
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Sergeev E, Grach S, Shindin A, Mishin E, Bernhardt P, Briczinski S, Isham B, Broughton M, LaBelle J, Watkins B. Artificial ionospheric layers during pump frequency stepping near the 4th gyroharmonic at HAARP. Phys Rev Lett 2013; 110:065002. [PMID: 23432261 DOI: 10.1103/physrevlett.110.065002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Indexed: 06/01/2023]
Abstract
We report on artificial descending plasma layers created in the ionosphere F region by high-power high-frequency (HF) radio waves from High-frequency Active Auroral Research Program at frequencies f(0) near the fourth electron gyroharmonic 4f(ce). The data come from concurrent measurements of the secondary escaping radiation from the HF-pumped ionosphere, also known as stimulated electromagnetic emission, reflected probing signals at f(0), and plasma line radar echoes. The artificial layers appeared only for injections along the magnetic field and f(0)>4f(ce) at the nominal HF interaction altitude in the background ionosphere. Their average downward speed ~0.5 km/s holds until the terminal altitude where the local fourth gyroharmonic matches f(0). The total descent increases with the nominal offset f(0)-4f(ce).
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Affiliation(s)
- E Sergeev
- Radiophysical Research Institute, 25a/12 Bolshaya Pecherskaya Street, Nizhny Novgorod 603950, Russia
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