Dedifferentiated Schwann cells promote perineural invasion mediated by the PACAP paracrine signalling in cervical cancer.

Perineural invasion (PNI) has emerged as a key pathological feature and be considered as a poor prognostic factor in cervical cancer. However, the underlying molecular mechanisms are largely unknown. Here, PNI status of 269 cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC) samples were quantified by using whole-slide diagnostic images obtained from The Cancer Genome Atlas. Integrated analyses revealed that PNI was an indicative marker of poorer disease-free survival for CESC patients. Among the differentially expressed genes, ADCYAP1 were identified. Clinical specimens supported that high expression of PACAP (encoded by ADCYAP1) contributed to PNI in CESC. Mechanistically, PACAP, secreted from cervical cancer cells, reversed myelin differentiation of Schwann cells (SCs). Then, dedifferentiated SCs promoted PNI by producing chemokine FGF17 and by degrading extracellular matrix through secretion of Cathepsin S and MMP-12. In conclusion, this study identified PACAP was associated with PNI in cervical cancer and suggested that tumour-derived PACAP reversed myelin differentiation of SCs to aid PNI.

Esthetics Effect and the Modified Placement of Robotic-Assisted Single-Site Laparoscopic Gynecologic Surgery by Common Robotic Instruments and LAGIS Single-Site Port.

OBJECTIVES: The accuracy of robotic surgery has been recognized by many doctors, but traditional robotic surgery requires 4-5 puncture holes in the operating area. With the popularization and application of single port laparoscopic surgery, the aesthetic of abdominal incision of robotic surgery has been challenged. How to use the single-site platform to complete robot operation is a new field worthy of our exploration. Here we introduce a kind of technology innovation of robot-assisted single-site laparoscopic surgery through common robotic equipment and LAGIS single-site port. METHODS: From November 2018 to March 2019, 20 patients with cervical cancer or endometrial cancer admitted to the minimally invasive gynecological group were included. Single-hole robotic surgery was successfully performed in all 20 patients, with no additional assisted puncture and no conversion to laparotomy. The operation time of patients, intraoperative bleeding volume and hospitalization time were recorded and compared. Besides, the Intraoperative complications were observed and analyzed. RESULTS AND CONCLUSIONS: By comparison, we can find that the effect of this innovative single-hole robotic surgery is significantly better than that of traditional single-hole laparoscopy.

A Comparative Analysis of Robotic Single-Site Surgery and Laparoendoscopic Single-Site Surgery as Therapeutic Options for Stage IB1 Cervical Squamous Carcinoma.

PURPOSE: To compare perioperative outcomes between robotic single-site surgical technique and conventional laparoendoscopic single-site surgical technique. METHODS: This was a retrospective cohort study involving 67 patients who received robotic single-site surgery or laparoendoscopic single-site surgery for the treatment of stage IB1 cervical squamous carcinoma. The robotic single-site radical hysterectomy technique combined with pelvic lymph node dissections were performed in 32 patients while the laparoendoscopic single-site radical hysterectomy technique combined with pelvic lymph node dissections were performed in 35 patients. RESULTS: The enrolled patients had been diagnosed with stage IB1 cervical squamous carcinoma. The perioperative outcomes were mean age (51.63±8.32 years in the lymph node dissection (RSS group) and 53.14±8.14 years in the lymph node dissection (LESS group), p=0.453); BMIs (23.76±2.72 in the RSS group and 23.46±2.28 in the LESS group, p=0.629); shorter operative times (223.56±15.43 min in the RSS group and 248.61±20.89 min in the LESS group, p<0.01) and less estimated blood loss (217.25±16.77 mL in the RSS group and 294.74±24.00 mL in the LESS group, p<0.01). None of the study participants exhibited postoperative pain. There were no statistically significant differences in the length of hospital stay (p=0.865), perioperative complications (p=0.602), duration of closure and removal of catheter (p=0.518) as well as in pathological diagnoses between the two groups. CONCLUSION: Robotic single-site surgery can be used in the treatment of early stage cervical cancer as it exhibits acceptable operative times and perioperative outcomes. This surgical technique is feasible and safe.

Identification of two molecular subtypes of dysregulated immune lncRNAs in ovarian cancer.

Long non-coding RNA (lncRNA) has increasingly been identified as a key regulator in pathologies such as cancer. Multiple platforms were used for comprehensive analysis of ovarian cancer to identify molecular subgroups. However, lncRNA and its role in mapping the ovarian cancer subpopulation are still largely unknown. RNA-sequencing and clinical characteristics of ovarian cancer were acquired from The Cancer Genome Atlas database (TCGA). A total of 52 lncRNAs were identified as aberrant immune lncRNAs specific to ovarian cancer. We redefined two different molecular subtypes, C1(188) and C2(184 samples), in "iClusterPlus" R package, among which C2 grouped ovarian cancer samples have higher survival probability and longer median survival time (P <0.05) with activated IFN-gamma response, Wound Healing and Cytotoxic lymphocytes signal; 456 differentially expressed genes were acquired in C1 and C2 subtypes using limma (3.40.6) package, among which 419 were up-regulated and 37 were down-regulated, in TCGA dataset. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) functional enrichment analysis revealed that these genes were actively involved in ECM-receptor interaction, PI3K-Akt signaling pathway interaction KEGG pathway. Compared with the existing immune subtype, the Cluster2 sample showed a substantial increase in the proportion of the existing C2 immune subtype, accounting for 81.37%, which was associated with good prognosis. Our C1 subtype contains only 56.49% of the existing immune C1 and C4, which also explains the poor prognosis of C1. Furthermore, 52 immune-related lncRNAs were used to divide the TCGA-endometrial cancer and cervical cancer samples into two categories, and C2 had a good prognosis. The differentially expressed genes were highly correlated with immune-cell-related pathways. Based on lncRNA, two molecular subtypes of ovarian cancer were identified and had significant prognostic differences and immunological characteristics.