Hisashi Narahara

More than 10 years following the publication of "The General Rules for Clinical Management of Endometriosis: The second edition" in January 2010, the long-awaited third edition has arrived. The second edition represents the bible for endome…

It is suggested that aberrantly expressed microRNAs are involved in the pathogenesis of endometriosis. Our previous study demonstrated that expression of the microRNA hsa-miR-199a-3p is attenuated in human endometriotic cyst stromal cells (…

AIM: We aimed to describe the clinical presentation, operative or medical management, and postoperative recurrence of bladder endometriosis (BE). METHODS: We conducted a national survey to investigate BE cases from 2006 to 2016 in Japan. H…

Endometriosis is a chronic inflammatory disease which is associated with aberrant chemokine expression. We have established a three-dimensional (3D) floating collagen gel culture of human endometriotic cyst stromal cells (ECSCs) as an in vi…

The aim of this publication is to disseminate the clinical practice guidelines for the treatment of intestinal, bladder/ureteral, thoracic and umbilical endometriosis, already published in Japanese, to non-Japanese speakers. For developing …

BACKGROUND: A number of microRNAs are aberrantly expressed in endometriosis and are involved in its pathogenesis. Our previous study demonstrated that has-miR-100-5p expression is enhanced in human endometriotic cyst stromal cells (ECSCs). …

Although parasitic leiomyoma could be spontaneous or iatrogenic in origin, port-site implantation of parasitic leiomyoma is an iatrogenic benign sequela of laparoscopic surgery. A 30-year-old, primigravida Japanese woman was referred after …

STUDY OBJECTIVE: To identify the clinical presentation, diagnostic evaluation, operative or medical management, and postoperative recurrence of umbilical endometriosis. DESIGN: A retrospective national survey. SETTING: Obstetrics and Gyne…

A number of genes involved in the pathogenesis of endometriosis are silenced by the hypermethylation of their promoter regions. We assessed the effect and mechanism of the DNA demethylating agent 5-aza-2'-deoxycytidine (5-aza-dC) (10 μM) on…

Endometriosis exhibits unique characteristics, such as fibrosis, resistance to apoptosis, and promotion of cell proliferation; however, its pathophysiology is not fully understood. Recurrence rates after treatment are high, and the progress…

Background: The heritable silencing of genes, without a change in their coding sequence, is due to epigenetic mechanisms. These mechanisms involve DNA methylation, the modification of histone, and non-coding RNA. Disrupting the balance of t…

BACKGROUND: We previously showed that microRNA-503 (miR-503) transfection into endometriotic cyst stromal cells (ECSCs) induced cell cycle arrest at the G0/G1 phase by suppressing cyclin D1. This finding prompted us to evaluate the potentia…

Decidualization of the endometrium and endometriosis involves the morphological and biochemical reprogramming of the estrogen-primed proliferative stromal compartment under the continuing influence of progesterone. Here, we evaluated the in…

STUDY QUESTION: Is the micro-RNA (miRNA) miR-503, downregulated in endometriotic cyst stromal cells (ECSCs) and does this affect the cell cycle, cell proliferation, angiogenesis and contractility of these cells? SUMMARY ANSWER: miR-503 expr…

miR-196b targets c-myc and Bcl-2 expression, inhibits proliferation and induces apoptosis in endometriotic stromal cells

Endometriosis, a disease affecting 3 % to 10 % of women of reproductive age, is characterized by the ectopic growth of endometrial tissue under the influence of estrogen. It is also becoming recognized as a condition in which ectopic endome…

Background. Although radiation exposure is of great concern to expecting patients, little information is available on the fetal radiation dose associated with prophylactic internal iliac artery balloon occlusion (IIABO). Here we estimated t…

Accumulating evidence suggests that epigenetic aberrations play definite roles in the pathogenesis of endometriosis. These include aberrations in genomic DNA methylation, microRNA expression, and histone modification. The aberrant histone m…

Purpose Gastrointestinal involvement of endometriosis may exist in up to 37% of women suffering from endometriosis, but malignant transformation of intestinal endometriosis is extremely rare. In this case report, we present a case of endome…