Publications by authors named "Hailan Yan"

Endometriosis is a chronic condition with limited therapeutic options. The molecular aberrations promoting ectopic attachment and interactions with the local microenvironment sustaining lesion growth have been unclear, prohibiting development of targeted therapies. Here, we performed single-cell and spatial transcriptomic profiling of ectopic lesions and eutopic endometrium in endometriosis.

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Article Synopsis
  • The study focused on 45 patients with ovarian endometriosis who experienced recurrent pain after laparoscopic surgery, with a follow-up period averaging over 10 years.
  • Results indicated that a significant number of patients had severe dysmenorrhea pre-surgery, and many had advanced stages of endometriosis and coexisting conditions like adenomyosis.
  • The findings suggest that while cyst recurrence occurred in 24.4% of patients, most reported only pain recurrence, indicating a need for long-term medication to manage symptoms and reduce the risk of recurrence.
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  • This study investigates the relationship between steroid receptor expression and fibrosis in adenomyosis, focusing on the effectiveness of the levonorgestrel-releasing intrauterine system (LNG-IUS) in alleviating pain.
  • In a cohort of 125 women, those reporting treatment success had higher levels of estrogen and progesterone receptors and less fibrosis compared to those who did not respond, indicating a significant correlation with symptom relief.
  • The findings suggest that lower levels of steroid receptors, particularly estrogen receptor-α in the tumor stroma, may predict treatment failure with LNG-IUS in women suffering from adenomyosis-related dysmenorrhoea.
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Objective: To investigate the clinical features of bladder endometriosis and factors associated with urinary symptoms, pregnancy outcomes, and long-term effects of symptom relief and recurrence.

Design: A single-center retrospective cohort study.

Setting: A tertiary referral hospital.

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Purpose: To summarize evidence on levonorgestrel releasing intrauterine system (LNG-IUS) in the treatment of adenomyosis (AM) and to identify potential research gaps.

Methods: Search was conducted in MEDLINE, The Cochrane Library, EMBASE, CBM, CNKI, and Wanfang. We included studies investigating patients with AM treated with LNG-IUS combined with conservative therapy.

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Background: The objective of our study was to investigate the risk factors for a decrease in ovarian reserve in patients with endometriomas after standardized laparoscopic procedures and evaluation to provide corresponding clinical guidance for patients with fertility requirements.

Methods: Anti-Müllerian hormone (AMH) levels and other clinical data from 233 patients with endometriomas and 57 patients with non-endometrioma ovarian cysts admitted to the Peking Union Medical College Hospital between January 2018 and September 2023 were prospectively analysed. The pretreatment AMH levels of the study groups were compared to assess the impact of endometrioma on ovarian reserve, and the decrease in AMH after treatment was analysed to determine potential risk factors contributing to this change.

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Endometriosis and adenomyosis are two similar gynecological diseases that are characterized by ectopic implantation and the growth of the endometrial tissue. Previous studies have reported that they share a common pathophysiology in some respects, such as a similar cellular composition and resistance to the progestogen of lesions, but their underlying mechanisms remain elusive. Emerging single-cell ribonucleic acid sequencing (scRNA-seq) technologies allow for the dissection of single-cell transcriptome mapping to reveal the etiology of diseases at the level of the individual cell.

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Background: The aim of the study is to investigate the proportion and clinical features of previous spontaneously ruptured ovarian endometrioma among women who underwent elective surgery for endometrioma.

Methods: This retrospective study was based on a cohort of elective surgeries for endometrioma performed by the same gynecologic team at Peking Union Medical College Hospital from January 2017 to October 2022. Patients diagnosed with previous spontaneously ruptured endometrioma during elective surgery were enrolled in the ruptured group.

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The purpose of this study was to implore the association among clinical features, long-term fertility outcomes and the anatomical location of adenomyosis identified by ultrasound. We collected data of non-pregnant patients between 20 and 40 years old who had undergone surgical exploration for benign gynecological conditions at our institution between January 2010 and December 2017. A total of 158 women met the inclusion criteria and were allocated into three groups according to the ultrasound-determined adenomyosis anatomical location: anterior (Group A), posterior (Group B), both posterior and anterior (Group C).

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Objective: To review the use of oral gonadotropin-releasing hormone (GnRH) antagonists and synthesize their efficacy and safety parameters for the treatment of endometriosis-associated pain.

Design: Systematic review and network meta-analysis.

Setting: Not applicable.

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Background: To examine and compare the differences in clinical characteristics and long-term postoperative outcomes of ovarian endometriomas (OMA) patients with and without dysmenorrhea, including data from at least 8 years of postoperative follow-up examinations.

Methods: Retrospective analysis of 334 OMA patients, including their demographic and clinical data. Long-term follow-up record was also collected.

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Objective: This study aimed to establish an effective prognostic nomogram for the postoperative recurrence of endometrioma or endometriosis-related pain for patients with endometrioma after long-term follow-up, who were younger than 45 years old and received postoperative therapy.

Methods: The predictive nomogram was based on 323 patients who underwent cystectomy for endometrioma at Perking Union Medical College Hospital from January 2009 to April 2013, and the last follow-up occurred in September 2018. We collected information on all included patients, including preoperative data, intraoperative data, and long-term follow-up data after surgery.

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Article Synopsis
  • The tumor microenvironment plays a crucial role in cancer development and progression, characterized by a diverse mix of cells and their genetic expressions.
  • Single-cell RNA sequencing captures detailed gene activity in individual cells, while spatially resolved transcriptomics adds context about cell locations, leading to a comprehensive understanding when combined.
  • Integrating these methods can enhance our understanding of cancer dynamics, inform treatment strategies, and identify new therapeutic targets by clarifying how different cells interact within tumors.
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Acetabular fractures are complex injuries with an annual incidence of approximately 4 per 100,000 (Laird and Keating, 2005 [1]. Although the open reduction is currently advocated for treating acetabular fractures, some acetabular fractures can be treated by minimally invasive surgery, with the advantages of minor trauma, less bleeding, reduced infection, and shorter operation time. Therefore, we report a case of a patient with a transverse fracture involving the acetabulum treated with a new method of cannulated screw fixation combined with a personalized 3D printed guide to achieving minimally invasive and precise treatment of acetabular fractures while we review the relevant papers.

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Organ transplantation has been employed upon serious injuries, but a T-cell-mediated potent inflammatory immune response often leads to graft rejection. Immunosuppressive drugs such as rapamycin (RAPA) have to be taken after organ transplantation, but long-term use of these drugs causes severe adverse effects. Immune checkpoint pathways such as the programmed death-receptor 1/programmed death-ligand 1 (PD-1/PD-L1) provides an immunosuppressive environment, preventing excessive tissue destruction due to inflammatory immune responses.

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Aim: To investigate the role of CAB39 in nasopharyngeal carcinoma (NPC) development and examine its expression level in NPC tumor samples.

Methods: Immunohistochemistry staining of NPC tissue microarray was conducted to detect the expression of CAB39 protein in NPC tissues, and the clinical significance of CAB39 was evaluated. Lentivirus-mediated over-expression of CAB39 was designed to increase CAB39 expression in CNE-1 cells.

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Benign prostatic hyperplasia (BPH) is the most common benign disease of the prostate gland and is caused by benign hyperplasia of the smooth muscle cells and stromal cells in this important gland. BPH is also the most common disease underlying lower urinary tract symptoms (LUTS). The incidence of BPH increases with age and affects more than half of all men 50 years or older.

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