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Pennel KAF, Hatthakarnkul P, Wood CS, Lian GY, Al-Badran SSF, Quinn JA, Legrini A, Inthagard J, Alexander PG, van Wyk H, Kurniawan A, Hashmi U, Gillespie MA, Mills M, Ammar A, Hay J, Andersen D, Nixon C, Rebus S, Chang DK, Kelly C, Harkin A, Graham J, Church D, Tomlinson I, Saunders M, Iveson T, Lannagan TRM, Jackstadt R, Maka N, Horgan PG, Roxburgh CSD, Sansom OJ, McMillan DC, Steele CW, Jamieson NB, Park JH, Roseweir AK, Edwards J. JAK/STAT3 represents a therapeutic target for colorectal cancer patients with stromal-rich tumors. J Exp Clin Cancer Res 2024; 43:64. [PMID: 38424636 PMCID: PMC10905886 DOI: 10.1186/s13046-024-02958-4] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/16/2024] [Indexed: 03/02/2024] Open
Abstract
Colorectal cancer (CRC) is a heterogenous malignancy underpinned by dysregulation of cellular signaling pathways. Previous literature has implicated aberrant JAK/STAT3 signal transduction in the development and progression of solid tumors. In this study we investigate the effectiveness of inhibiting JAK/STAT3 in diverse CRC models, establish in which contexts high pathway expression is prognostic and perform in depth analysis underlying phenotypes. In this study we investigated the use of JAK inhibitors for anti-cancer activity in CRC cell lines, mouse model organoids and patient-derived organoids. Immunohistochemical staining of the TransSCOT clinical trial cohort, and 2 independent large retrospective CRC patient cohorts was performed to assess the prognostic value of JAK/STAT3 expression. We performed mutational profiling, bulk RNASeq and NanoString GeoMx® spatial transcriptomics to unravel the underlying biology of aberrant signaling. Inhibition of signal transduction with JAK1/2 but not JAK2/3 inhibitors reduced cell viability in CRC cell lines, mouse, and patient derived organoids (PDOs). In PDOs, reduced Ki67 expression was observed post-treatment. A highly significant association between high JAK/STAT3 expression within tumor cells and reduced cancer-specific survival in patients with high stromal invasion (TSPhigh) was identified across 3 independent CRC patient cohorts, including the TrasnSCOT clinical trial cohort. Patients with high phosphorylated STAT3 (pSTAT3) within the TSPhigh group had higher influx of CD66b + cells and higher tumoral expression of PDL1. Bulk RNAseq of full section tumors showed enrichment of NFκB signaling and hypoxia in these cases. Spatial deconvolution through GeoMx® demonstrated higher expression of checkpoint and hypoxia-associated genes in the tumor (pan-cytokeratin positive) regions, and reduced lymphocyte receptor signaling in the TME (pan-cytokeratin- and αSMA-) and αSMA (pan-cytokeratin- and αSMA +) areas. Non-classical fibroblast signatures were detected across αSMA + regions in cases with high pSTAT3. Therefore, in this study we have shown that inhibition of JAK/STAT3 represents a promising therapeutic strategy for patients with stromal-rich CRC tumors. High expression of JAK/STAT3 proteins within both tumor and stromal cells predicts poor outcomes in CRC, and aberrant signaling is associated with distinct spatially-dependant differential gene expression.
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Affiliation(s)
- Kathryn A F Pennel
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK.
| | - Phimmada Hatthakarnkul
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Colin S Wood
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Guang-Yu Lian
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Sara S F Al-Badran
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Jean A Quinn
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Assya Legrini
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Jitwadee Inthagard
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Peter G Alexander
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Hester van Wyk
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Ahmad Kurniawan
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Umar Hashmi
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
- University of Glasgow Medical School, Glasgow, G12 8QQ, UK
| | | | - Megan Mills
- CRUK Scotland Institute, Glasgow, G61 1BD, UK
| | - Aula Ammar
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - Jennifer Hay
- Glasgow Tissue Research Facility, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK
| | - Ditte Andersen
- Bioclavis Ltd, Glasgow, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK
| | - Colin Nixon
- CRUK Scotland Institute, Glasgow, G61 1BD, UK
| | - Selma Rebus
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - David K Chang
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Caroline Kelly
- CRUK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, Gartnavel Hospital, Glasgow, G12 0XH, UK
| | - Andrea Harkin
- CRUK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, Gartnavel Hospital, Glasgow, G12 0XH, UK
| | - Janet Graham
- CRUK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, Gartnavel Hospital, Glasgow, G12 0XH, UK
| | - David Church
- Wellcome Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
- NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, OX3 9DU, UK
| | - Ian Tomlinson
- Edinburgh Cancer Research Centre, IGMM, University of Edinburgh, Crewe Road, Edinburgh, EH4 2XU, UK
| | - Mark Saunders
- The Christie NHS Foundation Trust, Manchester, M20 4BX, UK
| | - Tim Iveson
- Southampton University Hospital NHS Foundation Trust, Southampton, SO16 6YD, UK
| | | | | | - Noori Maka
- Department of Pathology, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK
| | - Paul G Horgan
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Campbell S D Roxburgh
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Owen J Sansom
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
- CRUK Scotland Institute, Glasgow, G61 1BD, UK
| | - Donald C McMillan
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
| | - Colin W Steele
- Department of Surgery, Glasgow Royal Infirmary, Glasgow, G31 2ER, UK
- CRUK Scotland Institute, Glasgow, G61 1BD, UK
| | - Nigel B Jamieson
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
| | - James H Park
- Department of Surgery, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK
| | | | - Joanne Edwards
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1QH, UK
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Melissourgou-Syka L, Gillespie MA, O'Cathail SM, Sansom OJ, Steele CW, Roxburgh CSD. A Review of Scheduling Strategies for Radiotherapy and Immune Checkpoint Inhibition in Locally Advanced Rectal Cancer. J Immunother Precis Oncol 2023; 6:187-197. [PMID: 38143952 PMCID: PMC10734391 DOI: 10.36401/jipo-23-10] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/07/2023] [Accepted: 07/15/2023] [Indexed: 12/26/2023]
Abstract
Colorectal cancer (CRC) is the third most common malignancy across the globe and, despite advances in treatment strategies, survival rates remain low. Rectal cancer (RC) accounts for most of these cases, and traditional management strategies for advanced disease include total neoadjuvant therapy (TNT) with chemoradiotherapy followed by curative surgery. Unfortunately, approximately 10-15% of patients have no response to treatment or have recurrence at a short interval following radiotherapy. The introduction of immunotherapy in the form of immune checkpoint blockade (ICB) in metastatic colorectal cancer has improved clinical outcomes, yet most patients with RC present with microsatellite stable disease, which lacks the immune-rich microenvironment where ICB is most effective. There is evidence that combining radiotherapy with ICB can unlock the mechanisms that drive resistance in patients; however, the sequencing of these therapies is still debated. This review offers a comprehensive overview of clinical trials and preclinical models that use radiotherapy-immunotherapy combinations in RC in an attempt to extrapolate the ideal sequencing of the two treatment modalities. The results highlight the dearth of evidence to answer the question of whether ICB should be given before, during, or after radiotherapy, yet it is suggested that improving the relevance of our preclinical models will provide a platform with higher translational value and will lead to appropriate clinical trial designs.
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Affiliation(s)
- Lydia Melissourgou-Syka
- School of Cancer Sciences, University of Glasgow, Glasgow, Scotland
- CRUK Beatson Institute, Glasgow, Scotland
| | | | - Sean M. O'Cathail
- School of Cancer Sciences, University of Glasgow, Glasgow, Scotland
- Beatson West of Scotland Cancer Centre, Glasgow, Scotland
| | - Owen J. Sansom
- School of Cancer Sciences, University of Glasgow, Glasgow, Scotland
- CRUK Beatson Institute, Glasgow, Scotland
| | - Colin W. Steele
- School of Cancer Sciences, University of Glasgow, Glasgow, Scotland
- CRUK Beatson Institute, Glasgow, Scotland
- Academic Unit of Surgery, Glasgow Royal Infirmary, Glasgow, Scotland
| | - Campbell S. D. Roxburgh
- School of Cancer Sciences, University of Glasgow, Glasgow, Scotland
- Academic Unit of Surgery, Glasgow Royal Infirmary, Glasgow, Scotland
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Corry SM, McCorry AM, Lannagan TR, Leonard NA, Fisher NC, Byrne RM, Tsantoulis P, Cortes-Lavaud X, Amirkhah R, Redmond KL, McCooey AJ, Malla SB, Rogan E, Sakhnevych S, Gillespie MA, White M, Richman SD, Jackstadt RF, Campbell AD, Maguire S, McDade SS, Longley DB, Loughrey MB, Coleman HG, Kerr EM, Tejpar S, Maughan T, Leedham SJ, Small DM, Ryan AE, Sansom OJ, Lawler M, Dunne PD. Activation of innate-adaptive immune machinery by poly(I:C) exposes a therapeutic vulnerability to prevent relapse in stroma-rich colon cancer. Gut 2022; 71:2502-2517. [PMID: 35477539 PMCID: PMC9664095 DOI: 10.1136/gutjnl-2021-326183] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 03/12/2022] [Indexed: 12/08/2022]
Abstract
OBJECTIVE Stroma-rich tumours represent a poor prognostic subtype in stage II/III colon cancer (CC), with high relapse rates and limited response to standard adjuvant chemotherapy. DESIGN To address the lack of efficacious therapeutic options for patients with stroma-rich CC, we stratified our human tumour cohorts according to stromal content, enabling identification of the biology underpinning relapse and potential therapeutic vulnerabilities specifically within stroma-rich tumours that could be exploited clinically. Following human tumour-based discovery and independent clinical validation, we use a series of in vitro and stroma-rich in vivo models to test and validate the therapeutic potential of elevating the biology associated with reduced relapse in human tumours. RESULTS By performing our analyses specifically within the stroma-rich/high-fibroblast (HiFi) subtype of CC, we identify and validate the clinical value of a HiFi-specific prognostic signature (HPS), which stratifies tumours based on STAT1-related signalling (High-HPS v Low-HPS=HR 0.093, CI 0.019 to 0.466). Using in silico, in vitro and in vivo models, we demonstrate that the HPS is associated with antigen processing and presentation within discrete immune lineages in stroma-rich CC, downstream of double-stranded RNA and viral response signalling. Treatment with the TLR3 agonist poly(I:C) elevated the HPS signalling and antigen processing phenotype across in vitro and in vivo models. In an in vivo model of stroma-rich CC, poly(I:C) treatment significantly increased systemic cytotoxic T cell activity (p<0.05) and reduced liver metastases (p<0.0002). CONCLUSION This study reveals new biological insight that offers a novel therapeutic option to reduce relapse rates in patients with the worst prognosis CC.
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Affiliation(s)
- Shania M Corry
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Amy Mb McCorry
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | | | - Niamh A Leonard
- Lambe Institute for Translational Research, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland
- Discipline of Pharmacology & Therapeutics, School of Medicine, National University of Ireland, Galway, Ireland
| | - Natalie C Fisher
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Ryan M Byrne
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | | | | | - Raheleh Amirkhah
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Keara L Redmond
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Aoife J McCooey
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Sudhir B Malla
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Emily Rogan
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Svetlana Sakhnevych
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Michael A Gillespie
- Cancer Research UK, Beatson Institute for Cancer Research, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Mark White
- Cancer Research UK, Beatson Institute for Cancer Research, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Susan D Richman
- Leeds Institute of Medical Research, University of Leeds, Leeds, UK
| | - Rene-Filip Jackstadt
- Cancer Research UK, Beatson Institute for Cancer Research, Glasgow, UK
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH) and Cancer Progression and Metastasis Group, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Andrew D Campbell
- Cancer Research UK, Beatson Institute for Cancer Research, Glasgow, UK
| | - Sarah Maguire
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Simon S McDade
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Daniel B Longley
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Maurice B Loughrey
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
- Cellular Pathology, Belfast Health and Social Care Trust, Belfast, UK
- Centre for Public Health, Queens University Belfast, Belfast, UK
| | - Helen G Coleman
- Centre for Public Health, Queens University Belfast, Belfast, UK
| | - Emma M Kerr
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Sabine Tejpar
- Digestive Oncology Unit, University Ospital Gasthuisberg, Leuven, Belgium
| | | | - Simon J Leedham
- Wellcome Trust Centre Human Genetics, University of Oxford, Oxford, UK
| | - Donna M Small
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Aideen E Ryan
- Lambe Institute for Translational Research, College of Medicine Nursing and Health Sciences, National University of Ireland, Galway, Ireland
- Discipline of Pharmacology & Therapeutics, School of Medicine, National University of Ireland, Galway, Ireland
| | - Owen J Sansom
- Cancer Research UK, Beatson Institute for Cancer Research, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Mark Lawler
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
| | - Philip D Dunne
- Patrick G Johnston Centre for Cancer Research, Queen's University Belfast, Belfast, UK
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Gillespie MA, Steele CW, Lannagan TR, Sansom OJ, Roxburgh CS. Pre-clinical modelling of rectal cancer to develop novel radiotherapy-based treatment strategies. Oncol Rev 2021; 15:511. [PMID: 34249240 PMCID: PMC8237517 DOI: 10.4081/oncol.2021.511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 05/17/2021] [Indexed: 12/15/2022] Open
Abstract
Pre-operative chemoradiotherapy reduces local recurrence rates in locally advanced rectal cancer. 10-20% of patients undergo complete response to chemoradiotherapy, however, many patients show no response. The mechanisms underlying this are poorly understood; identifying molecular and immunological factors underpinning heterogeneous responses to chemoradiotherapy, will promote development of treatment strategies to improve responses and overcome resistance mechanisms. This review describes the advances made in pre-clinical modelling of colorectal cancer, including genetically engineered mouse models, transplantation models, patient derived organoids and radiotherapy platforms to study responses to chemoradiotherapy. Relevant literature was identified through the PubMed and MEDLINE databases, using the following keywords: rectal cancer; mouse models; organoids; neo-adjuvant treatment; radiotherapy; chemotherapy. By delineating the advantages and disadvantages of available models, we discuss how modelling techniques can be utilized to address current research priorities in locally advanced rectal cancer. We provide unique insight into the potential application of pre-clinical models in the development of novel neo-adjuvant treatment strategies, which will hopefully guide future clinical trials.
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Affiliation(s)
- Michael A. Gillespie
- Cancer Research UK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | | | | | - Owen J. Sansom
- Cancer Research UK Beatson Institute, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Campbell S.D. Roxburgh
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- Academic Unit of Surgery, School of Medicine, University of Glasgow, Glasgow, UK
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Gillespie MA, Balzer WK, Brodke MH, Garza M, Gerbec EN, Gillespie JZ, Gopalkrishnan P, Lengyel JS, Sliter KA, Sliter MT, Withrow SA, Yugo JE. Normative measurement of job satisfaction in the US. Journal of Managerial Psychology 2016. [DOI: 10.1108/jmp-07-2014-0223] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Purpose
– The purpose of this paper is to discuss the importance of norms and inference, while providing national overall and subgroup norms for the updated Job Descriptive Index and Job in General measures of job satisfaction.
Design/methodology/approach
– A stratified random sample was drawn from an online panel to represent the US working population on key variables. Validity evidence is provided. Determination of subgroup norms was based on practical significance.
Findings
– The revised measures fit the theorized model and patterns of results are consistent with the literature. Practical subgroup differences were found for some stratification variables. Subgroup norms are made available; the first US overall norms are provided.
Research limitations/implications
– An updated job satisfaction measurement system is made available, complete with nationally representative overall and subgroup norms. A major limitation and direction for future research is the lack of norms for other nations.
Practical implications
– The revised measurement system is available for use in practice. National overall norms improve decision-makers’ ability to infer respondents’ relative standing and make comparisons across facets and employees. The JDI is useful for dimensional diagnostics and development efforts; the JIG is useful for evaluating overall job satisfaction levels.
Social implications
– By facilitating valid inferences of job satisfaction scores, the revised measurement system serves to enhance the quality of life at work.
Originality/value
– The authors provide the only publicly available job satisfaction measurement system that has US national overall norms.
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Kunz JD, Gillespie MA, Mack GW. Quantitative assessment of cutaneous C‐fiber function in human skin via direct sudomotor activation. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.lb767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Gary W Mack
- Exercise SciencesBrigham Young UniversityProvoUT
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Mack GW, Rasmussen NN, Kunz JD, Gillespie MA. Fluid shifts during running with body weight unloading by LBPP. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.lb772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gary W Mack
- Exercise SciencesBrigham Young UniversityProvoUT
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Yankelevich M, Broadfoot A, Gillespie JZ, Gillespie MA, Guidroz A. General job stress: a unidimensional measure and its non-linear relations with outcome variables. Stress Health 2012; 28:137-48. [PMID: 22282221 DOI: 10.1002/smi.1413] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 05/19/2011] [Accepted: 05/24/2011] [Indexed: 11/09/2022]
Abstract
This article aims to examine the non-linear relations between a general measure of job stress [Stress in General (SIG)] and two outcome variables: intentions to quit and job satisfaction. In so doing, we also re-examine the factor structure of the SIG and determine that, as a two-factor scale, it obscures non-linear relations with outcomes. Thus, in this research, we not only test for non-linear relations between stress and outcome variables but also present an updated version of the SIG scale. Using two distinct samples of working adults (sample 1, N = 589; sample 2, N = 4322), results indicate that a more parsimonious eight-item SIG has better model-data fit than the 15-item two-factor SIG and that the eight-item SIG has non-linear relations with job satisfaction and intentions to quit. Specifically, the revised SIG has an inverted curvilinear J-shaped relation with job satisfaction such that job satisfaction drops precipitously after a certain level of stress; the SIG has a J-shaped curvilinear relation with intentions to quit such that turnover intentions increase exponentially after a certain level of stress.
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Gillespie MA, Denison DR, Haaland S, Smerek R, Neale WS. Linking organizational culture and customer satisfaction: Results from two companies in different industries. European Journal of Work and Organizational Psychology 2008. [DOI: 10.1080/13594320701560820] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Oswald FL, Schmitt N, Kim BH, Ramsay LJ, Gillespie MA. Developing a Biodata Measure and Situational Judgment Inventory as Predictors of College Student Performance. Journal of Applied Psychology 2004; 89:187-207. [PMID: 15065969 DOI: 10.1037/0021-9010.89.2.187] [Citation(s) in RCA: 171] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
This article describes the development and validation of a biographical data (biodata) measure and situational judgment inventory (SJI) as useful predictors of broadly defined college student performance outcomes. These measures provided incremental validity when considered in combination with standardized college-entrance tests (i.e., SAT/ACT) and a measure of Big Five personality constructs. Racial subgroup mean differences were much smaller on the biodata and SJI measures than on the standardized tests and college grade point average. Female students tended to outperform male students on most predictors and outcomes with the exception of the SAT/ACT. The biodata and SJI measures show promise for student development contexts and for selecting students on a wide range of outcomes with reduced adverse impact.
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Affiliation(s)
- Frederick L Oswald
- Department of Psychology, Michigan State University, East Lansing, MI 48824-1117, USA.
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Schmitt N, Oswald FL, Kim BH, Gillespie MA, Ramsay LJ, Yoo TY. Impact of Elaboration on Socially Desirable Responding and the Validity of Biodata Measures. Journal of Applied Psychology 2003; 88:979-88. [PMID: 14640810 DOI: 10.1037/0021-9010.88.6.979] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The current study investigated the impact of requiring respondents to elaborate on their answers to a biodata measure on mean scores, the validity of the biodata item composites, subgroup mean differences, and correlations with social desirability. Results of this study indicate that elaborated responses result in scores that are much lower than nonelaborated responses to the same items by an independent sample. Despite the lower mean score on elaborated items, it does not appear that elaboration affects the size of the correlation between social desirability and responses to biodata items or that it affects criterion-related validity or subgroup mean differences in a practically significant way.
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Affiliation(s)
- Neal Schmitt
- Dept of Psychology, Michigan State University, East Lansing, MI 48824-1117, USA.
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Abstract
Antiviral activities of acyclovir (9-[(2-hydroxyethoxy) methyl] guanine, ACV), penciclovir (9-[4-hydroxy-3-(hydroxymethyl) butyl] guanine, PCV), ganciclovir ([9-(1,3-dihydroxy-2-propoxy) methyl] guanine, GCV), and foscarnet (phosphonoformic acid, PFA) were determined against Human Herpesvirus 6 (HHV-6) by flow cytometric technique. The technique is based on the detection of gp116 antigen expression in virus infected cells. Susceptibility was defined in terms of drug concentration which reduced the number of cells expressing HHV-6 gp116 antigen with a mean fluorescent intensity (MFI) by 50% as compared to virus infected untreated cells. GCV was found to be most effective against HHV-6 followed by PFA, PCV and ACV. For HHV-6A, the mean 50% inhibitory concentrations (IC50) of GCV and PFA were found to be 3.4 microM and 34.7 microM respectively, whereas the IC50 of ACV and PCV were found to be 53.7 microM and 37.9 microM respectively. For HHV-6B, the IC50 of GCV and PFA were found to be 5.7 microM and 71.4 microM respectively, whereas the IC50 of ACV and PCV were found to be 119.0 microM and 77.8 microM respectively. Flow cytometry is a valuable technique for the evaluation of antiviral compounds against viruses including HHV-6.
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Affiliation(s)
- M Amjad
- Department of Biology, University of Minnesota, Duluth, 55812, USA
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Abstract
Angiotensin II (A-II) has been found previously to increase mean arterial pressure (MAP) and enhance fluid absorption in the rat ileum in situ after intracerebroventricular (ICV) administration. In this investigation, the CNS-mediated proabsorptive actions of A-II and other products of the renin-angiotensin system, as well as nonhomologous peptides were further characterized in the urethane-anesthetized rat. At an ICV bolus dose of 1 microgram, angiotensinogen, A-I, A-II and A-III produced significant elevations in MAP, but only A-II and A-III increased ileal absorption significantly above that of saline-treated rats. The ICV administration of other unrelated peptides did not mimic the actions of A-II or A-III. The results suggest that the pressor and ileal proabsorptive actions of angiotensins are mediated through different CNS mechanisms and that these peptides uniquely alter intestinal transport.
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Affiliation(s)
- D R Brown
- Department of Veterinary Biology, University of Minnesota, College of Veterinary Medicine, St. Paul 55108
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Brown DR, Gillespie MA. Actions of centrally administered neuropeptides on rat intestinal transport: enhancement of ileal absorption by angiotensin II. Eur J Pharmacol 1988; 148:411-8. [PMID: 3384004 DOI: 10.1016/0014-2999(88)90120-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Recent evidence suggests that opioids and other peptides may act within the CNS to modulate intestinal fluid and ion transport. In this study, the brain peptides bombesin and angiotensin II were examined for their ability to alter water flux across the small intestine after their intracerebroventricular (i.c.v.) administration to rats. In addition, changes in mean arterial pressure and respiratory frequency were determined after peptide treatment to assess the physiological specificity of their CNS actions. Bombesin, administered by i.c.v. bolus injections (10-1000 ng/rat) or continuous infusion (100 ng/min), rapidly elevated blood pressure and respiration, but had no significant effect on water transport in proximal jejunum or distal ileum in situ (as measured by single-pass perfusion with [14C]polyethylene glycol as non-absorbed water marker). Angiotensin II rapidly increased blood pressure and enhanced ileal absorption 30 min after its i.c.v. bolus injection at 0.1-1 microgram, but had no effect on jejunal transport or respiration. These effects were inhibited in rats pretreated with either the angiotensin antagonist [Sar1, Val5, Ala8]angiotensin II (5 micrograms i.c.v.) or the alpha-adrenoceptor antagonist, phentolamine (1 mg/kg i.v.). In contrast, atropine methylnitrate (0.1 mg/kg i.v.) pretreatment inhibited the proabsorptive, but not the pressor effects of angiotensin. These results indicate for the first time that angiotensin II promotes fluid absorption in the rat intestine by an action within the CNS. The mechanisms underlying this novel action of angiotensin appear to differ from those responsible for its hypertensive action.
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Affiliation(s)
- D R Brown
- University of Minnesota, College of Veterinary Medicine, Department of Veterinary Biology, St. Paul 55108
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