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Pancreatic Neoplasms: HELP
Articles by Rosalind E. Jenkins
Based on 7 articles published since 2009
(Why 7 articles?)

Between 2009 and 2019, R. E. Jenkins wrote the following 7 articles about Pancreatic Neoplasms.
+ Citations + Abstracts
1 Article Proteomic analysis of pancreatic cancer stem cells: Functional role of fatty acid synthesis and mevalonate pathways. 2017

Brandi, Jessica / Dando, Ilaria / Pozza, Elisa Dalla / Biondani, Giulia / Jenkins, Rosalind / Elliott, Victoria / Park, Kevin / Fanelli, Giuseppina / Zolla, Lello / Costello, Eithne / Scarpa, Aldo / Cecconi, Daniela / Palmieri, Marta. ·University of Verona, Department of Biotechnology, Proteomics and Mass Spectrometry Laboratory, Verona 37134, Italy. · University of Verona, Department of Neuroscience, Biomedicine and Movement, Verona 37134, Italy. · University of Liverpool, MRC Centre for Drug Safety Science, Department of Molecular & Clinical Pharmacology, Liverpool L69 3GE, United Kingdom. · NIHR Liverpool Pancreas Biomedical Research Unit, Department of Molecular and Therapeutic Cancer Medicine, Royal Liverpool University Hospital, Liverpool L69 3GA, United Kingdom. · Department of Ecological and Biological Sciences, University of Tuscia, Viterbo, Italy. · University and Hospital Trust of Verona, Applied Research on Cancer Network (ARC-NET), Department of Pathology and Diagnostics, Verona 37134, Italy. · University of Verona, Department of Biotechnology, Proteomics and Mass Spectrometry Laboratory, Verona 37134, Italy. Electronic address: daniela.cecconi@univr.it. ·J Proteomics · Pubmed #27746256.

ABSTRACT: Recently, we have shown that the secretome of pancreatic cancer stem cells (CSCs) is characterized by proteins that participate in cancer differentiation, invasion, and metastasis. However, the differentially expressed intracellular proteins that lead to the specific characteristics of pancreatic CSCs have not yet been identified, and as a consequence the deranged metabolic pathways are yet to be elucidated. To identify the modulated proteins of pancreatic CSCs, iTRAQ-based proteomic analysis was performed to compare the proteome of Panc1 CSCs and Panc1 parental cells, identifying 230 modulated proteins. Pathway analysis revealed activation of glycolysis, the pentose phosphate pathway, the pyruvate-malate cycle, and lipid metabolism as well as downregulation of the Krebs cycle, the splicesome and non-homologous end joining. These findings were supported by metabolomics and immunoblotting analysis. It was also found that inhibition of fatty acid synthase by cerulenin and of mevalonate pathways by atorvastatin have a greater anti-proliferative effect on cancer stem cells than parental cells. Taken together, these results clarify some important aspects of the metabolic network signature of pancreatic cancer stem cells, shedding light on key and novel therapeutic targets and suggesting that fatty acid synthesis and mevalonate pathways play a key role in ensuring their viability. BIOLOGICAL SIGNIFICANCE: To better understand the altered metabolic pathways of pancreatic cancer stem cells (CSCs), a comprehensive proteomic analysis and metabolite profiling investigation of Panc1 and Panc1 CSCs were carried out. The findings obtained indicate that Panc1 CSCs are characterized by upregulation of glycolysis, pentose phosphate pathway, pyruvate-malate cycle, and lipid metabolism and by downregulation of Krebs cycle, spliceosome and non-homologous end joining. Moreover, fatty acid synthesis and mevalonate pathways are shown to play a critical contribution to the survival of pancreatic cancer stem cells. This study is helpful for broadening the knowledge of pancreatic cancer stem cells and could accelerate the development of novel therapeutic strategies.

2 Article Decreased Serum Thrombospondin-1 Levels in Pancreatic Cancer Patients Up to 24 Months Prior to Clinical Diagnosis: Association with Diabetes Mellitus. 2016

Jenkinson, Claire / Elliott, Victoria L / Evans, Anthony / Oldfield, Lucy / Jenkins, Rosalind E / O'Brien, Darragh P / Apostolidou, Sophia / Gentry-Maharaj, Aleksandra / Fourkala, Evangelia-O / Jacobs, Ian J / Menon, Usha / Cox, Trevor / Campbell, Fiona / Pereira, Stephen P / Tuveson, David A / Park, B Kevin / Greenhalf, William / Sutton, Robert / Timms, John F / Neoptolemos, John P / Costello, Eithne. ·Department of Molecular and Clinical Cancer Medicine, University of Liverpool, UK. · National Institute for Health Research Liverpool Pancreas Biomedical Research Unit, Royal Liverpool University Hospital, UK. · MRC Centre for Drug Safety Science, Department of Pharmacology and Therapeutics, University of Liverpool, UK. · Department of Women's Cancer, Institute for Women's Health, University College London, UK. · Faculty of Medical & Human Sciences, 1.018 Core Technology Facility, University of Manchester, UK. · Department of Pathology, University of Liverpool, UK. · Institute for Liver and Digestive Health, University College London. · Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA. ·Clin Cancer Res · Pubmed #26573598.

ABSTRACT: PURPOSE: Identification of serum biomarkers enabling earlier diagnosis of pancreatic ductal adenocarcinoma (PDAC) could improve outcome. Serum protein profiles in patients with preclinical disease and at diagnosis were investigated. EXPERIMENTAL DESIGN: Serum from cases up to 4 years prior to PDAC diagnosis and controls (UKCTOCS,n= 174) were studied, alongside samples from patients diagnosed with PDAC, chronic pancreatitis, benign biliary disease, type 2 diabetes mellitus, and healthy subjects (n= 298). Isobaric tags for relative and absolute quantification (iTRAQ) enabled comparisons of pooled serum from a test set (n= 150). Validation was undertaken using multiple reaction monitoring (MRM) and/or Western blotting in all 472 human samples and samples from a KPC mouse model. RESULTS: iTRAQ identified thrombospondin-1 (TSP-1) as reduced preclinically and in diagnosed samples. MRM confirmed significant reduction in levels of TSP-1 up to 24 months prior to diagnosis. A combination of TSP-1 and CA19-9 gave an AUC of 0.86, significantly outperforming both markers alone (0.69 and 0.77, respectively;P< 0.01). TSP-1 was also decreased in PDAC patients compared with healthy controls (P< 0.05) and patients with benign biliary obstruction (P< 0.01). Low levels of TSP-1 correlated with poorer survival, preclinically (P< 0.05) and at clinical diagnosis (P< 0.02). In PDAC patients, reduced TSP-1 levels were more frequently observed in those with confirmed diabetes mellitus (P< 0.01). Significantly lower levels were also observed in PDAC patients with diabetes compared with individuals with type 2 diabetes mellitus (P= 0.01). CONCLUSIONS: Circulating TSP-1 levels decrease up to 24 months prior to diagnosis of PDAC and significantly enhance the diagnostic performance of CA19-9. The influence of diabetes mellitus on biomarker behavior should be considered in future studies.

3 Article iTRAQ reveals candidate pancreatic cancer serum biomarkers: influence of obstructive jaundice on their performance. 2013

Tonack, S / Jenkinson, C / Cox, T / Elliott, V / Jenkins, R E / Kitteringham, N R / Greenhalf, W / Shaw, V / Michalski, C W / Friess, H / Neoptolemos, J P / Costello, E. ·Department of Molecular and Clinical Cancer Medicine, Liverpool Cancer Research-UK Centre, University of Liverpool, Liverpool, UK. ·Br J Cancer · Pubmed #23579209.

ABSTRACT: BACKGROUND: The aims of our study were to identify serum biomarkers that distinguish pancreatic cancer (pancreatic ductal adenocarcinoma, PDAC) patients from benign pancreatic disease patients and healthy subjects, and to assess the effects of jaundice on biomarker performance. METHODS: Isobaric tags for relative and absolute quantification were used to compare pooled serum and pancreatic juice samples from a test set of 59 and 25 subjects, respectively. Validation was undertaken in 113 independent subjects. RESULTS: Candidate proteins Complement C5, inter-α-trypsin inhibitor heavy chain H3, α1-β glycoprotein and polymeric immunoglobulin receptor were elevated in cancer, as were the reference markers CA19-9 and Reg3A. Biliary obstruction had a significant effect on the performance of the markers, in particular within the PDAC group where the presence of jaundice was associated with a significant increase in the levels of all six proteins (P<0.01). Consequently, in the absence of jaundice, proteins showed reduced sensitivity for PDAC patients over benign subjects and healthy controls (HCs). Similarly, in the presence of jaundice, markers showed reduced specificity for PDAC patients over benign subjects with jaundice. Combining markers enabled improved sensitivity for non-jaundiced PDAC patients over HCs and improved specificity for jaundiced PDAC patients over jaundiced benign disease subjects. CONCLUSIONS: The presence-absence of jaundice in the clinical scenario severely impacts the performance of biomarkers for PDAC diagnosis and has implications for their clinical translation.

4 Article Tetracycline-inducible protein expression in pancreatic cancer cells: effects of CapG overexpression. 2011

Tonack, Sarah / Patel, Sabina / Jalali, Mehdi / Nedjadi, Taoufik / Jenkins, Rosalind E / Goldring, Christopher / Neoptolemos, John / Costello, Eithne. ·Liverpool CR-UK Centre, Department of Molecular and Therapeutic Cancer Medicine, University of Liverpool, Liverpool, L69 3GA, UK. ·World J Gastroenterol · Pubmed #21528072.

ABSTRACT: AIM: To establish stable tetracycline-inducible pancreatic cancer cell lines. METHODS: Suit-2, MiaPaca-2, and Panc-1 cells were transfected with a second generation reverse tetracycline-controlled transactivator protein (rtTA2S-M2), under the control of either a cytomegalovirus (CMV) or a chicken β-actin promoter, and the resulting clones were characterised. RESULTS: Use of the chicken (β-actin) promoter proved superior for both the production and maintenance of doxycycline-inducible cell lines. The system proved versatile, enabling transient inducible expression of a variety of genes, including GST-P, CYP2E1, S100A6, and the actin capping protein, CapG. To determine the physiological utility of this system in pancreatic cancer cells, stable inducible CapG expressors were established. Overexpressed CapG was localised to the cytoplasm and the nuclear membrane, but was not observed in the nucleus. High CapG levels were associated with enhanced motility, but not with changes to the cell cycle, or cellular proliferation. In CapG-overexpressing cells, the levels and phosphorylation status of other actin-moduating proteins (Cofilin and Ezrin/Radixin) were not altered. However, preliminary analyses suggest that the levels of other cellular proteins, such as ornithine aminotransferase and enolase, are altered upon CapG induction. CONCLUSION: We have generated pancreatic-cancer derived cell lines in which gene expression is fully controllable.

5 Article Smad4 loss is associated with fewer S100A8-positive monocytes in colorectal tumors and attenuated response to S100A8 in colorectal and pancreatic cancer cells. 2010

Ang, Chin Wee / Nedjadi, Taoufik / Sheikh, Adnan A / Tweedle, Elizabeth M / Tonack, Sarah / Honap, Sailish / Jenkins, Rosalind E / Park, B Kevin / Schwarte-Waldhoff, Irmgard / Khattak, Ilyas / Azadeh, Bahram / Dodson, Andrew / Kalirai, Helen / Neoptolemos, John P / Rooney, Paul S / Costello, Eithne. ·The Liverpool Cancer Research-UK Centre, Division of Surgery and Oncology, School of Cancer Studies, University of Liverpool, Liverpool L69 3GA, UK. ·Carcinogenesis · Pubmed #20622003.

ABSTRACT: S100A8 and its dimerization partner S100A9 are emerging as important chemokines in cancer. We previously reported that Smad4-negative pancreatic tumors contain fewer stromal S100A8-positive monocytes than their Smad4-positive counterparts. Here, we studied S100A8/A9-expressing cells in colorectal tumors relating their presence to clinicopathological parameters and Smad4 status. Two-dimensional gel electrophoresis (n = 12) revealed variation in the levels of S100A8 protein in colorectal cancer tumors, whereas immunohistochemical analysis (n = 313) showed variation in the numbers of stromal S100A8-positive and S100A9-positive cells. Loss of Smad4 expression was observed in 42/304 (14%) colorectal tumors and was associated with reduced numbers of S100A8-positive (P = 0.03) but not S100A9-positive stromal cells (P = 0.26). High S100A9 cell counts were associated with large tumor sizes (P = 0.0006) and poor differentiation grade (P = 0.036). However, neither S100A8 nor S100A9 cell counts predicted poor survival, except for patients with Smad4-negative tumors (P = 0.02). To address the impact of environmental S100A8/A9 chemokines on tumor cells, we examined the effects of exogenously added S100A8 and S100A9 proteins on cellular migration and proliferation of colorectal and pancreatic cancer cells. S100A8 and S100A9 enhanced migration and proliferation in Smad4-positive and Smad4-negative cancer cells. However, transient depletion of Smad4 resulted in loss of responsiveness to exogenous S100A8, but not S100A9. S100A8 and S100A9 activated Smad4 signaling as evidenced by phosphorylation of Smad2/3; blockade of the receptor for the advanced glycation end products inhibited this response. In conclusion, Smad4 loss alters the tumor's interaction with stromal myeloid cells and the tumor cells' response to the stromal chemokine, S100A8.

6 Article S100A6 binds to annexin 2 in pancreatic cancer cells and promotes pancreatic cancer cell motility. 2009

Nedjadi, T / Kitteringham, N / Campbell, F / Jenkins, R E / Park, B K / Navarro, P / Ashcroft, F / Tepikin, A / Neoptolemos, J P / Costello, E. ·Division of Surgery and Oncology, University of Liverpool, Liverpool, UK. ·Br J Cancer · Pubmed #19724273.

ABSTRACT: BACKGROUND: High levels of S100A6 have been associated with poor outcome in pancreatic cancer patients. The functional role of S100A6 is, however, poorly understood. METHODS: Immunoprecipitation followed by two-dimensional gel electrophoresis and mass spectrometry were undertaken to identify S100A6 interacting proteins in pancreatic cancer cells. Immunohistochemistry and coimmunofluorescence were performed to examine expression or colocalisation of proteins. siRNA was used to deplete specific proteins and effects on motility were measured using Boyden Chamber and wound healing assays. RESULTS: Our proteomic screen to identify S100A6 interacting proteins revealed annexin 11, annexin 2, tropomyosin beta and a candidate novel interactor lamin B1. Of these, annexin 2 was considered particularly interesting, as, like S100A6, it is expressed early in the development of pancreatic cancer and overexpression occurs with high frequency in invasive cancer. Reciprocal immunoprecipitation confirmed the interaction between annexin 2 and S100A6 and the proteins colocalised, particularly in the plasma membrane of cultured pancreatic cancer cells and primary pancreatic tumour tissue. Analysis of primary pancreatic cancer specimens (n=55) revealed a strong association between high levels of cytoplasmic S100A6 and the presence of annexin 2 in the plasma membrane of cancer cells (P=0.009). Depletion of S100A6 was accompanied by diminished levels of membrane annexin 2 and caused a pronounced reduction in the motility of pancreatic cancer cells. CONCLUSION: These findings point towards a functional role for S100A6 that may help explain the link between S100A6 expression in pancreatic cancer and aggressive disease.

7 Article A technically detailed and pragmatic protocol for quantitative serum proteomics using iTRAQ. 2009

Tonack, Sarah / Aspinall-O'Dea, Mark / Jenkins, Rosalind E / Elliot, Victoria / Murray, Seonaid / Lane, Catherine S / Kitteringham, Neil R / Neoptolemos, John P / Costello, Eithne. ·Royal Liverpool University Hospital, University of Liverpool, United Kingdom. ·J Proteomics · Pubmed #19651253.

ABSTRACT: Blood is recognised as a highly important source of disease-related biomarkers, and proteomic approaches for identifying novel blood-borne biomarkers are in demand. The complexity and dynamic protein concentration range of plasma/serum however complicates the analysis process. A number of strategies for simplification of blood prior to proteomic analysis have been developed. In addition, methods for quantifying the levels of proteins in samples, such as isobaric tags for relative and absolute quantification (iTRAQ) are emerging. However, the successful application of these procedures is not always straightforward and technical hurdles must be overcome. Here we provide a technically detailed working protocol for iTRAQ-based quantification of serum proteins following immunodepletion of high abundance proteins. To improve the number of proteins identified and quantified we have introduced several modifications to the standard iTRAQ protocol. We report identifications of 217 proteins (5773 peptides) with a false discovery rate of 1% or 254 proteins with 95% confidence, respectively. Relative quantification data were obtained for 234 (95% confidence) serum proteins, including species present in the concentration range of tissue leakage factors. The samples described here relate to pancreatic cancer; however the protocol can be applied to serum from other control or disease types.