Background: Protein glycosylation is an important post-translational modification shown to be altered in all tumour types studied to date. Mucin glycoproteins have been established as important carriers of O-linked glycans but other glycoproteins exhibiting altered glycosylation repertoires have yet to be identified but offer potential as biomarkers for metastatic cancer.
Methodology: In this study a glycoproteomic approach was used to identify glycoproteins exhibiting alterations in glycosylation in colorectal cancer and to evaluate the changes in O-linked glycosylation in the context of the p53 and KRAS (codon 12/13) mutation status. Affinity purification with the carbohydrate binding protein from Helix pomatia agglutinin (HPA) was coupled to 2-dimensional gel electrophoresis with mass spectrometry to enable the identification of low abundance O-linked glycoproteins from human colorectal cancer specimens.
Results: Aberrant O-linked glycosylation was observed to be an early event that occurred irrespective of the p53 and KRAS status and correlating with metastatic colorectal cancer. Affinity purification using the lectin HPA followed by proteomic analysis revealed annexin 4, annexin 5 and CLCA1 to be increased in the metastatic colorectal cancer specimens. The results were validated using a further independent set of specimens and this showed a significant association between the staining score for annexin 4 and HPA and the time to metastasis; independently (annexin A4: Chi square 11.45, P = 0.0007; HPA: Chi square 9.065, P = 0.0026) and in combination (annexin 4 and HPA combined: Chi square 13.47; P = 0.0002).
Conclusion: Glycoproteins showing changes in O-linked glycosylation in metastatic colorectal cancer have been identified. The glycosylation changes were independent of p53 and KRAS status. These proteins offer potential for further exploration as biomarkers and potential targets for metastatic colorectal cancer.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4619703 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0138345 | PLOS |
Publication Analysis
Top Keywords
Similar Publications
Dementia Care Practice.
Alzheimers Dement
December 2024
University of Florida, Gainesville, FL, USA.
Introduction: Colonoscopies are medical procedures used to identify colon abnormalities and remove polyps to decrease the incidence of colorectal cancer. Prior to this exam, patients must undergo bowel preparation to ensure proper cleansing of the colon and maximize outcomes (e.g.
View Article and Find Full Text PDFLife after Pelvic Exenteration for Rectal Cancer: The Patient and Carer Perspective on Long Term Consequences and Survivorship.
Ann Surg
January 2025
Surgical Outcomes Research Centre (SOuRCe), Royal Prince Alfred Hospital, Sydney, Australia.
Objective: To explore the perspectives and experiences of patients and carers living with the long-term consequences of pelvic exenteration.
Summary Background Data: Pelvic exenteration is accepted as the standard of care for selected patients with locally advanced or recurrent rectal cancer. With contemporary 5-year survival reported at 40-60%, the number of long-term survivors is expected to increase.
Marine-Derived Compound Targeting mTOR and FGFR-2: A Promising Strategy for Breast, Lung, and Colorectal Cancer Therapy.
Med Chem
January 2025
Integrated Genetics and Molecular Oncology Group, Department of Genetic Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamilnadu, 603203, India.
Introduction: The marine habitat is a plentiful source of diverse, active compounds that are extensively utilised for their medicinal properties. Pharmaceutical trends have currently changed towards utilising a diverse range of goods derived from the marine environment.
Method: This study aimed to examine the inhibitory effects of bioactive chemicals derived from marine algae and bacteria.
Prognostic Value of Tumor Regression Grade Combined with Pathological Lymph Node Status in Initially Node-Positive Rectal Cancer Treated with Neoadjuvant Chemoradiotherapy.
J Invest Surg
January 2025
Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.
Background: The prognostic value of tumor regression grade (TRG) after neoadjuvant chemoradiotherapy for rectal cancer is inconsistent in the literature. Both TRG and post-therapy lymph node (ypN) status could reflect the efficacy of neoadjuvant therapy. Here, we explored whether TRG combined with ypN status could be a prognostic factor for MRI-based lymph node-positive (cN+) rectal cancer following neoadjuvant chemoradiotherapy.
View Article and Find Full Text PDFColorectal Cancer and Its Microenvironment: A Brief Review.
Med J Islam Repub Iran
September 2024
Department of Oncology, West Kazakhstan Marat Ospanov Medical University, Aktobe, Kazakhstan.
Background: The narrative review aims to explore CRC pathogenesis by deciphering genetic-environmental interactions, analyzing the tumor microenvironment's role, and assessing treatment responses. These objectives seek to enhance clinical decision-making and improve CRC patient care through a comprehensive understanding of the disease.
Methods: A narrative review from 2019 to 2024 on colorectal cancer (CRC) pathogenesis and treatment strategies was conducted.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!