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Robb TJ, Tsai P, Fitzgerald S, Shields P, Houseman PS, Patel R, Fan V, Curran B, Tse R, Ting J, Kramer N, Woodhouse BJ, Coats E, Le Quesne Stabej P, Reeve J, Parker K, Lawrence B, Blenkiron C, Print CG. Complex patterns of genomic heterogeneity identified in 42 tumor samples and ctDNA of a pulmonary atypical carcinoid patient. Cancer Research Communications 2022; 3:31-42. [PMID: 36968225 PMCID: PMC10035512 DOI: 10.1158/2767-9764.crc-22-0101] [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: 03/07/2022] [Revised: 07/26/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022]
Abstract
Abstract
Tumor evolution underlies many challenges facing precision oncology, and improving our understanding has the potential to improve clinical care. This study represents a rare opportunity to study tumor heterogeneity and evolution in a patient with an understudied cancer type. A patient with pulmonary atypical carcinoid, a neuroendocrine tumor, metastatic to 90 sites, requested and consented to donate tissues for research. 42 tumor samples collected at rapid autopsy from 14 anatomically distinct sites were analyzed through DNA whole-exome sequencing and RNA-Seq, and five analyzed through linked-read sequencing. Targeted DNA sequencing was completed on two clinical tissue biopsies and one blood plasma sample. Chromosomal alterations and gene variants accumulated over time, and specific chromosomal alterations preceded the single predicted gene driver variant (ARID1A). At the time of autopsy, all sites shared the gain of one copy of Chr 5, loss of one copy of Chr 6 and 21, chromothripsis of one copy of Chr 11, and 39 small variants. Two tumor clones (carrying additional variants) were detected at metastatic sites, and occasionally in different regions of the same organ (e.g., within the pancreas). Circulating tumor DNA (ctDNA) sequencing detected shared tumor variants in the blood plasma and captured marked genomic heterogeneity, including all metastatic clones but few private tumor variants. This study describes genomic tumor evolution and dissemination of a pulmonary atypical carcinoid donated by a single generous patient. It highlights the critical role of chromosomal alterations in tumor initiation and explores the potential of ctDNA analysis to represent genomically heterogeneous disease.
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Affiliation(s)
| | - Peter Tsai
- University of Auckland, Auckland, Auckland, New Zealand
| | | | | | | | | | - Vicky Fan
- University of Auckland, Auckland, New Zealand
| | - Ben Curran
- University of Auckland, Auckland, New Zealand
| | | | | | - Nicole Kramer
- Waitemata District Health Board, Auckland, New Zealand
| | | | | | | | - Jane Reeve
- Auckland District Health Board, New Zealand
| | - Kate Parker
- University of Auckland, Auckland, New Zealand
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2
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Scotter EL, Cao MC, Jansson D, Rustenhoven J, Smyth LCD, Aalderink MC, Siemens A, Fan V, Wu J, Mee EW, Faull RLM, Dragunow M. The amyotrophic lateral sclerosis-linked protein TDP-43 regulates interleukin-6 cytokine production by human brain pericytes. Mol Cell Neurosci 2022; 123:103768. [PMID: 36038081 DOI: 10.1016/j.mcn.2022.103768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/02/2022] [Accepted: 08/12/2022] [Indexed: 12/30/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal movement disorder involving degeneration of motor neurons through dysfunction of the RNA-binding protein TDP-43. Pericytes, the perivascular cells of the blood-brain, blood-spinal cord, and blood-CSF barriers also degenerate in ALS. Indeed, pericytes are among the earliest cell types to show gene expression changes in pre-symptomatic animal models of ALS. This suggests that pericyte degeneration precedes neurodegeneration and may involve pericyte cell-autonomous TDP-43 dysfunction. Here we determined the effect of TDP-43 dysfunction in human brain pericytes on interleukin 6 (IL-6), a critical secreted inflammatory mediator reported to be regulated by TDP 43. Primary human brain pericytes were cultured from biopsy tissue from epilepsy surgeries and TDP-43 was silenced using siRNA. TDP-43 silencing of pericytes stimulated with pro-inflammatory cytokines, interleukin-1β or tumour necrosis factor alpha, robustly suppressed the induction of IL-6 transcript and protein. IL-6 regulation by TDP-43 did not involve the assembly of TDP-43 nuclear splicing bodies, and did not occur via altered splicing of IL6. Instead, transcriptome-wide analysis by RNA-Sequencing identified a poison exon in the IL6 destabilising factor HNRNPD (AUF1) as a splicing target of TDP-43. Our data support a model whereby TDP-43 silencing favours destabilisation of IL6 mRNA, via enhanced AU-rich element-mediated decay by HNRNP/AUF1. This suggests that cell-autonomous deficits in TDP-43 function in human brain pericytes would suppress their production of IL-6. Given the importance of the blood-brain and blood-spinal cord barriers in maintaining motor neuron health, TDP-43 in human brain pericytes may represent a cellular target for ALS therapeutics.
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Affiliation(s)
- Emma L Scotter
- Centre for Brain Research, University of Auckland, New Zealand; School of Biological Sciences, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Maize C Cao
- Centre for Brain Research, University of Auckland, New Zealand; School of Biological Sciences, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Deidre Jansson
- Centre for Brain Research, University of Auckland, New Zealand; School of Biological Sciences, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Justin Rustenhoven
- Centre for Brain Research, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Leon C D Smyth
- Centre for Brain Research, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Miranda C Aalderink
- Centre for Brain Research, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Andrew Siemens
- Centre for Brain Research, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
| | - Vicky Fan
- Bioinformatics Institute, University of Auckland, Auckland, New Zealand.
| | - Jane Wu
- Centre for Brain Research, University of Auckland, New Zealand; Department of Anatomy and Medical Imaging, University of Auckland, New Zealand.
| | - Edward W Mee
- Department of Neurosurgery, Auckland City Hospital, Auckland, New Zealand.
| | - Richard L M Faull
- Centre for Brain Research, University of Auckland, New Zealand; Department of Anatomy and Medical Imaging, University of Auckland, New Zealand.
| | - Mike Dragunow
- Centre for Brain Research, University of Auckland, New Zealand; Department of Pharmacology and Clinical Pharmacology, University of Auckland, New Zealand.
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Brooks AES, Iminitoff M, Williams E, Damani T, Jackson-Patel V, Fan V, James J, Dunbar PR, Feisst V, Sheppard HM. Ex Vivo Human Adipose Tissue Derived Mesenchymal Stromal Cells (ASC) Are a Heterogeneous Population That Demonstrate Rapid Culture-Induced Changes. Front Pharmacol 2020; 10:1695. [PMID: 32153389 PMCID: PMC7044177 DOI: 10.3389/fphar.2019.01695] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/27/2019] [Indexed: 12/14/2022] Open
Abstract
Human adipose-derived mesenchymal stromal cells (ASC) are showing clinical promise for the treatment of a range of inflammatory and degenerative conditions. These lipoaspirate-derived cells are part of the abundant and accessible source of heterogeneous stromal vascular fraction (SVF). They are typically isolated and expanded from the SVF via adherent cell culture for at least 2 weeks and as such represent a relatively undefined population of cells. We isolated ex vivo ASC directly from lipoaspirate using a cocktail of antibodies combined with immunomagnetic bead sorting. This method allowed for the rapid enrichment of a defined and untouched ex vivo ASC population (referred to as MACS-derived ASC) that were then compared to culture-derived ASC. This comparison found that MACS-derived ASC contain a greater proportion of cells with activity in in vitro differentiation assays. There were also significant differences in the secretion levels of some key paracrine molecules. Moreover, when the MACS-derived ASC were subjected to adherent tissue culture, rapid changes in gene expression were observed. This indicates that culturing cells may alter the clinical utility of these cells. Although MACS-derived ASC are more defined compared to culture-derived ASC, further investigations using a comprehensive multicolor flow cytometry panel revealed that this cell population is more heterogeneous than previously appreciated. Additional studies are therefore required to more precisely delineate phenotypically distinct ASC subsets with the most therapeutic potential. This research highlights the disparity between ex vivo MACS-derived and culture-derived ASC and the need for further characterization.
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Affiliation(s)
- Anna E S Brooks
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
| | - Megan Iminitoff
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Eloise Williams
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Tanvi Damani
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | | | - Vicky Fan
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Joanna James
- Department of Obstetrics and Gynecology, University of Auckland, Auckland, New Zealand
| | - P Rod Dunbar
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
| | - Vaughan Feisst
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
| | - Hilary M Sheppard
- School of Biological Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
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Gamage T, Perry J, Fan V, Groom K, Chamley L, James J. Trophoblast stem cells isolated using the side-population technique are depleted in placentae from growth restricted pregnancies. Placenta 2019. [DOI: 10.1016/j.placenta.2019.06.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chatterjee A, Leichter AL, Fan V, Tsai P, Purcell RV, Sullivan MJ, Eccles MR. Erratum: A cross comparison of technologies for the detection of microRNAs in clinical FFPE samples of hepatoblastoma patients. Sci Rep 2015; 5:13505. [PMID: 26328756 PMCID: PMC4557124 DOI: 10.1038/srep13505] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Storey AG, Birch NP, Fan V, Smith HK. Stress responses to short-term intensified and reduced training in competitive weightlifters. Scand J Med Sci Sports 2015; 26:29-40. [PMID: 25640639 DOI: 10.1111/sms.12400] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2014] [Indexed: 01/22/2023]
Abstract
We sought to identify and evaluate the tolerance to, and consequences of, short-term variations in training load in competitive weightlifters. Seven international-level lifters performed 1 week of initial training followed by 2 weeks of intensified (INT: +100%, 36.5 ± 11.3 × 10(3) kg/week) and 1 week of subsequently reduced (RED: -25%) training within their annual program. After INT, but not RED, 90 min of weightlifting increased mRNA levels of chemokine (C-C motif) ligand 4 (CCL4), chemokine (C-X-C motif) receptor 4 (CXCR4) and cellular stress-associated DNA-damage-inducible transcript 4 (DDIT4) in peripheral blood mononuclear cells by 40-240%. Resting- and weightlifting-induced changes in plasma protein carbonyls, indicative of oxidative stress, but not pro-inflammatory CCL4 concentrations differed between INT and RED. Symptoms of stress (Daily Analysis of Life Demands of Athletes questionnaire) were reported as worse than normal more frequently during INT and RED than initial training. Global (negative) mood state increased during INT and declined during RED. Maximal snatch (-4.3 ± 3.7%) and vertical jump (-7.2 ± 6.5%), but not clean and jerk, were reduced after INT and restored after RED. Chemokine signaling may thus be part of the stress response to intense weightlifting and short-term reductions in training load support recovery from periodic INT training in weightlifters.
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Affiliation(s)
- A G Storey
- Department of Sport and Exercise Science, The University of Auckland, Auckland, New Zealand
| | - N P Birch
- School of Biological Sciences, Centre for Brain Research and Brain Research New Zealand, The University of Auckland, Auckland, New Zealand
| | - V Fan
- Bioinformatics Institute, The University of Auckland, Auckland, New Zealand
| | - H K Smith
- Department of Sport and Exercise Science, The University of Auckland, Auckland, New Zealand
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Sheppard HM, Verdon D, Brooks AES, Feisst V, Ho YYJ, Lorenz N, Fan V, Birch NP, Didsbury A, Dunbar PR. MicroRNA regulation in human CD8+ T cell subsets--cytokine exposure alone drives miR-146a expression. J Transl Med 2014; 12:292. [PMID: 25331734 PMCID: PMC4219087 DOI: 10.1186/s12967-014-0292-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 10/08/2014] [Indexed: 12/21/2022] Open
Abstract
Background microRNAs (miRNAs) are emerging as key regulators of the immune system, but their role in CD8+ T cell differentiation is not well explored. Some evidence suggests that signals from cell surface receptors influence the expression of miRNAs in CD8+ T cells, and may have consequent effects on cell phenotype and function. We set out to investigate whether common gamma chain cytokines modulated human CD8+ T cell expression of miR-146a, which previous studies have associated with different stages of CD8+ differentiation. We also investigated how changes in miR-146a related to other miRNAs that alter with CD8+ differentiation status. Methods We treated human CD8+ T cells with the cytokines IL-2, IL-7 or IL-15 either at rest or after stimulation with anti-CD3 and anti-CD28. For some experiments we also purified human CD8+ T cell subsets ex vivo. Flow cytometry was used in parallel to assess cell surface memory marker expression. Total RNA from these cells was subjected to microarray analysis and real-time PCR for miRNA expression. Nucleofection studies were performed to assess potential mRNA targets of miR-146a. Results We find that miR-146a is up-regulated in naïve CD8+ T cells exposed to IL-2 or IL-15, even in the absence of an activating T cell receptor stimulus, but not when IL-7 is also present. miR-146a expression correlates with a memory phenotype in both ex vivo and in vitro cultured cells although in our hands overexpression of miR-146a was not sufficient alone to drive a full memory phenotype. In ex vivo analysis, miR-146a was one of a small number of miRNAs that was differentially expressed between naïve and memory CD8+ T cells. Conclusions miR-146a is emerging as a critical regulator of immune system. Our data shows that miR-146a expression is strongly influenced by the cytokine milieu even in the absence of a T cell receptor stimulus. Our results have implications for studies designed to assess the function of miR-146a, help to define a fingerprint of miRNA expression in CD8+ T cell subsets and may be useful when designing optimal protocols for T cell expansion as efficacy of T cell immunotherapy is correlated with an ‘early’ memory phenotype. Electronic supplementary material The online version of this article (doi:10.1186/s12967-014-0292-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hilary M Sheppard
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
| | - Daniel Verdon
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
| | - Anna E S Brooks
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
| | - Vaughan Feisst
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
| | - Yu-Yu Joyce Ho
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
| | - Natalie Lorenz
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand.
| | - Vicky Fan
- Bioinformatics Institute, University of Auckland, Auckland, NZ, New Zealand.
| | - Nigel P Birch
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Centre for Brain Research, University of Auckland, Auckland, NZ, New Zealand.
| | - Alicia Didsbury
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand.
| | - P Rod Dunbar
- School of Biological Sciences, University of Auckland, Thomas Building, Auckland, NZ, New Zealand. .,Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, NZ, New Zealand.
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Nair D, Fan V, Tay A, Tien S, Yeo J. A retrospective analysis of preoperative blood ordering and transfusion practices in orthognathic surgery. Int J Oral Maxillofac Surg 2007. [DOI: 10.1016/j.ijom.2007.08.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
We present a retrospective audit of radial fasciocutaneous vascularised free flaps performed over a decade. These have all been done with binocular loupe magnification, allowing comparison of free flap success with conventional microscope vessel anastomosis. The results are similar to other reported series.
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Affiliation(s)
- D R Ashworth
- The Black Country Head and Neck Oncology Unit, Oral and Maxillofacial Surgery, New Cross Hospital, Wolverhampton WV10 0QP, UK.
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Abstract
Auxin transport was studied in coleoptile sections that were stimulated geotropically. The early time course of auxin-transport asymmetry was measured. An initial phase in which more IAA was delivered into the receptor for the upper half was found after 5 min of horizontal exposure. After about 15 min this was followed by the expected known asymmetry in which more auxin flows in the lower side of the coleoptile. Upon return of the coleoptile to a vertical position, this asymmetry disappeared within 30 min.Earlier correlations of geosensitivity of the auxin transport system with sedimentation of amyloplasts in comparisons of wild type corn and an amylomaize mutant were confirmed and extended. It was also shown that, in contrast to the geotropic effect, phototropically induced lateral auxin asymmetry was not significantly different in wild type and amylomaize. Eleven other single-gene endosperm starch mutants of corn were compared to their corresponding normals. In all pairs, if a difference in geosensitivity of lateral auxin transport was present, it was correlated with a parallel difference in amyloplast sedimentation: e.g., sugary 1 ("67") had an amyloplast asymmetry index of 0.32 and a 13% gravity effect on auxin transport; the paired wild-type had both a greater amyloplast asymmetry (0.61) and a greater gravity effect on transport (23%).Correlations between gravity effects on auxin transport and amyloplasts were also shown in comparisons of apical and basal sections of corn, oat and Sorghum coleoptiles.Further results, confirming the increased effect of centrifugal acceleration greater than 1xg on lateral auxin transport and on curvature, are in agreement with the hypothesis that the pressure exerted by amyloplasts, acting as statoliths, locally stimulates the auxin transport system in the individual cells.
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Affiliation(s)
- B Filner
- MSU/AEC Plant Research Laboratory, Michigan State University, East Lansing
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