Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Recurrent early-stage endometrial cancer and non-recurrent early-stage endometrial cancer

ABSTRACT: We performed the standard surgical procedure of total hysterectomy, bilateral adnexectomy and pelvic lymph node dissection on patients with early-stage endometrial cancer. A 72-month follow-up observation was conducted after the surgery to monitor the recurrence situation.The samples is T1aN0M0; Three samples (B80203,C19284,C17025) is not recurrent, one sample (C13956) is recurrent after 12 months.

INSTRUMENT(S): Illumina HiSeq 4000

ORGANISM(S): Homo sapiens

SUBMITTER: Ben Wang

PROVIDER: E-MTAB-15670 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:It has been recognised for a long time that cell surface glycans plays a vital role in the biological process and their altered form can lead to cancer. However, the molecular details and regulatory mechanism between the glycans and cancer is yet not clear. Over the past decade mass spectrometry-based techniques has become a prominent method for analysing glycans especially N-glycan matrix assisted laser desorption/ionisation mass spectrometry imaging (MALDI MSI). It is a powerful technique that combines mass spectrometry with histology, enabling the visualisation and label free detection of N-linked glycans on a single tissue section. Here, we carried out N-glycan MALDI MSI on six endometrial cancer (EC) formalin fixed paraffin embedded (FFPE) tissue sections including the adjacent normal endometrium, and tissue microarrays (TMA) consisting of 8 EC patients with lymph node metastasis (LNM) and 20 without LNM. By doing that several m/z values were detected that can significantly distinguish normal endometrium from cancerous. Also, detected a m/z value that can discriminate the primary tumour with LNM from those without. Identification of those discriminative m/z values was performed using porous graphitized carbon liquid chromatography tandem mass spectrometry (PGC-LC-MS/MS). Overall, we observed higher abundance of oligomannose in tumour regions compared to normal with AUC ranges from 0.85-0.99. Whereas, complex N-glycans were detected in lower abundance with AUC ranges from 0.03-0.28. Comparison of N-glycans between the primary tumours with LNM and without LNM indicates reduced abundance of a complex core-fucosylated N-glycan in patients with metastasis relative to without. In summary, N-glycan MALDI MSI can be used to characterize the cancerous endometrium from the normal, also patients with LNM from those without. Identification of those discriminative m/z values was performed using porous graphitized carbon liquid chromatography tandem mass spectrometry (PGC-LC-MS/MS).

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Recurrent early-stage endometrial cancer and non-recurrent early-stage endometrial cancer

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