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Erschienen in: Annals of Surgical Oncology 13/2020

17.08.2020 | Peritoneal Surface Malignancy

Ratios of miRNAs in Peritoneal Exosomes are Useful Biomarkers to Predict Tumor Response to Intraperitoneal Chemotherapy in Patients with Peritoneal Metastases from Gastric Cancer

verfasst von: Hideyuki Ohzawa, MD, Ph.D, Yuki Kimura, MD, Akira Saito, MD, Hironori Yamaguchi, MD, PhD, Hideyo Miyato, MD, PhD, Yasunaru Sakuma, MD, Ph.D, Hisanaga Horie, MD, PhD, Yoshinori Hosoya, MD, Ph.D, Alan Kawarai Lefor, MD, PhD, Naohiro Sata, MD, Ph.D, Joji Kitayama, MD, PhD

Erschienen in: Annals of Surgical Oncology | Ausgabe 13/2020

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Abstract

Background

Repeat intraperitoneal (IP) chemotherapy has been successfully used for treatment of peritoneal metastases (PM) from gastric cancer (GC). Exosomes play important roles not only in tumor progression but also in chemoresistance via transfer of microRNAs (miRNAs). However, there is little evidence of an effect of miRNAs in peritoneal exosomes on chemosensitivity of peritoneal lesions.

Methods

In 74 patients with advanced GC who underwent staging laparoscopy, exosomes were isolated from peritoneal fluid and expression levels of miR-21-5p, miR-223-3p, and miR-29b-3p determined using TaqMan Advanced miRNA assays. In 43 patients with PM treated with combination chemotherapy, S-1 plus Oxaliplatin together with IP Paclitaxel, the relationship between their relative expression levels and outcomes was examined.

Results

The ratios of miR-21-5p/miR-29b-3p and miR-223-3p/miR-29b-3p were significantly upregulated in patients with PM, especially in patients with high serum CA125 levels. They showed a mild association with Peritoneal Cancer Index (PCI) score and ascites. More impressively, the ratios were significantly higher in 16 patients with progression of PM within 1 year compared with 27 patients with an excellent tumor response (miR-21-5p/miR-29b-3p: median 17.49, range 1.83–50.90 vs. median 4.64, range 0.40–38.96, p = 0.0015, miR-223-3p/miR-29b-3p: median 1.02, range 0.23–25.85 vs. median 0.21, range 0.01–50.07, p = 0.0006). Overall survival of patients with high miR-21/miR-29b or miR-223/miR-29b ratios was significantly worse than in patients with low ratios (p = 0.0117, p = 0.0021).

Conclusions

The ratios of miRNAs in peritoneal exosome correlate with survival of the patients with PM from GC and suggest the possibility that they modify the chemosensitivity against IP chemotherapy.
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Metadaten
Titel
Ratios of miRNAs in Peritoneal Exosomes are Useful Biomarkers to Predict Tumor Response to Intraperitoneal Chemotherapy in Patients with Peritoneal Metastases from Gastric Cancer
verfasst von
Hideyuki Ohzawa, MD, Ph.D
Yuki Kimura, MD
Akira Saito, MD
Hironori Yamaguchi, MD, PhD
Hideyo Miyato, MD, PhD
Yasunaru Sakuma, MD, Ph.D
Hisanaga Horie, MD, PhD
Yoshinori Hosoya, MD, Ph.D
Alan Kawarai Lefor, MD, PhD
Naohiro Sata, MD, Ph.D
Joji Kitayama, MD, PhD
Publikationsdatum
17.08.2020
Verlag
Springer International Publishing
Erschienen in
Annals of Surgical Oncology / Ausgabe 13/2020
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-020-09007-2

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