SNHG22 overexpression indicates poor prognosis and induces chemotherapy resistance via the miR-2467/Gal-1 signaling pathway in epithelial ovarian carcinoma.

SNHG22 overexpression indicates poor prognosis and induces chemotherapy resistance via the miR-2467/Gal-1 signaling pathway in epithelial ovarian carcinoma. Aging (Albany NY). 2019 Oct 03;11: Authors: Zhang PF, Wu J, Luo JH, Li KS, Wang F, Huang W, Wu Y, Gao SP, Zhang XM, Zhang PN Abstract Recently, an increasing number of studies have reported that dysregulation of long noncoding RNAs (lncRNAs) plays an important role in cancer initiation and progression, including in epithelial ovarian carcinoma (EOC). However, little is known about the detailed biological functions of the lncRNA small nucleolar RNA host gene 22 (SNHG22) during the progression of EOC. Here, we found that SNHG22 was significantly increased in EOC tissues and was significantly associated with a low level of differentiation. Forced SNHG22 expression promoted chemotherapy resistance in EOC cells. Knockdown of SNHG22 expression increased the sensitivity of EOC cells to cisplatin and paclitaxel. Importantly, we found that SNHG22 could directly interact with miR-2467 and lead to the release of miR-2467-targeted Gal-1 mRNA. Moreover, SNHG22 overexpression induced EOC cell resistance to chemotherapy agents via PI3K/AKT and ERK cascade activation. In summary, our findings demonstrate that SNHG22 plays a critical role in the chemotherapy resistance of EOC by mediating the miR-2467/Gal-1 regulatory axis. PMID: 31581131 [PubMed - as supplied by publisher]
Source: Aging - Category: Biomedical Science Authors: Tags: Aging (Albany NY) Source Type: research

Related Links:

Conclusion.Our analysis showed no differences in miR29b and 199a expression, and differences in baseline CTCs in women with newly diagnosed ovarian tumors were not statistically significant.
Source: The Oncologist - Category: Cancer & Oncology Authors: Tags: Gynecologic Oncology, Chinese Edition, Clinical Trial Results Source Type: research
AbstractPatients with advanced stage ovarian clear cell carcinoma (OCCC) have a poor prognosis due to resistance to conventional platinum chemotherapy. Recent studies have demonstrated that PI3K/AKT/mTOR and ERK1/2 signaling pathways are involved in this chemoresistance. Progranulin (PGRN) overexpression contributes to cisplatin resistance of epithelial ovarian cancer cell lines. Also, PGRN expression is regulated by AKT/mTOR and ERK1/2 signaling pathways in different cell types. Thus, the present study was designed to identify if PGRN expression is regulated by AKT, mTOR, and ERK1/2 signaling pathways in the OCCC cell lin...
Source: Medical Oncology - Category: Cancer & Oncology Source Type: research
CONCLUSIONS: Platinum-free interval ≥ 12 months, complete response and normalized CA-125 levels after ultimate platinum-based chemotherapy are associated with prolonged PFS and OS in relapsing BRCA1/BRCA2 mutated ovarian cancer patients who received olaparib as maintenance therapy. PMID: 31604666 [PubMed - as supplied by publisher]
Source: Gynecologic Oncology - Category: Cancer & Oncology Authors: Tags: Gynecol Oncol Source Type: research
CONCLUSIONS: Although CD146 immunoreactivity in tumor cells did not correlate with the routinely used clinico-pathological parameters, expression of CD146 in tumor cells was an independent pronostic factor for survival in serous ovarian carcinomas. Moreover, CD146 might be regarded as a novel biomarker of tumor neovasculature. PMID: 31424655 [PubMed - in process]
Source: Journal of B.U.ON. - Category: Cancer & Oncology Tags: J BUON Source Type: research
ConclusionInitial tumor load has not been found associated with PFS after complete surgery. Adipocytes-enriched areas and right mesocolic areas involvement were associated with poor prognosis in patients receiving primary debulking surgery. Larger-scale studies are needed to assess whether initial tumor load has a prognostic impact even after complete cytoreductive surgery is achieved.
Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
CONCLUSION: Our analysis showed no differences in miR29b and 199a expression, and differences in baseline CTCs in women with newly diagnosed ovarian tumors were not statistically significant. PMID: 31346130 [PubMed - as supplied by publisher]
Source: The Oncologist - Category: Cancer & Oncology Authors: Tags: Oncologist Source Type: research
CONCLUSION: Our early experience demonstrates the safety and feasibility of IFRT as an effective salvage therapy and enables a "chemotherapy holiday" in selected recurrent EOC settings. The CA-125 value before IFRT (within normal range) and/or platinum sensitivity could be used as selection criteria for IFRT. PMID: 31328453 [PubMed - in process]
Source: Journal of Gynecologic Oncology - Category: OBGYN Tags: J Gynecol Oncol Source Type: research
Discussion MDSCs violently emerge in pathological conditions in an attempt to limit potentially harmful immune and inflammatory responses. Mechanisms supporting their expansion and survival are deeply investigated in cancer, in the perspective to reactivate specific antitumor responses and prevent their contribution to disease evolution. These findings will likely contribute to improve the targeting of MDSCs in anticancer immunotherapies, either alone or in combination with immune checkpoint inhibitors. New evidence indicates that the expansion of myeloid cell differentiation in pathology is subject to fine-tuning, as its...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
We present the case of a patient diagnosed with compartment syndrome of the hand after laparoscopic surgery for epithelial ovarian cancer. The patient is a 42-year-old woman with incidental finding of high-grade ovarian serous carcinoma after an emergency surgery. On imaging evaluation, the patient was found to have evidence of residual retroperitoneal adenopathy and was taken to the operating room for a staging procedure by laparoscopy. In the immediate postoperative period, she developed compartment syndrome of the right hand that required multiple fasciotomies and multidisciplinary management by plastic surgery, orthope...
Source: Journal of Minimally Invasive Gynecology - Category: OBGYN Source Type: research
Conclusions: We found a highly reliable FI network, which revealed LIFR, PIK3R1, and MMP12 as novel prognostic biomarker candidates for GBC. These findings could accelerate biomarker discovery and therapeutic development in this cancer. Introduction Gallbladder cancer (GBC), the sixth most common gastrointestinal cancer, is an uncommon but challenging disease. Its incidence has recently increased highly worldwide (1). The risk factors for GBC include sex, aging, obesity, chronic cholecystitis, and cholelithiasis (2, 3). Because of the lack of an effective early diagnostic method, the disease often is not diagnosed ...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
More News: Biomedical Science | Cancer | Cancer & Oncology | Carcinoma | Chemotherapy | Epithelial Cancer | Genetics | Ovarian Cancer | Ovaries | Study