Clinical trials

The goal of this observational study is to describe the local change in interleukin-6 (IL-6) across a blood clot in adults with acute ischemic stroke caused by anterior circulation large vessel occlusion who are undergoing mechanical thrombectomy. The main questions it aims to answer are: * Is the level of IL-6 different in arterial blood collected beyond the clot compared with arterial blood collected before the clot during mechanical thrombectomy? * Is the trans-thrombus IL-6 difference associated with functional independence 90 days after stroke and with complications related to reperfusion injury? There is no comparison group and no experimental treatment. Researchers will compare paired blood samples collected from opposite sides of the clot in the same participant. Blood collected from a peripheral vein at hospital admission will be used only as a supportive reference for systemic inflammation. Participants will: * Receive standard mechanical thrombectomy and stroke care determined by their treating clinical team. * Have small blood samples collected at planned time points, including paired arterial blood samples collected during the thrombectomy procedure. * Have clinical and imaging information collected from their medical records and have functional status assessed 90 days after stroke. The study will not delay or change standard stroke treatment.

We aim to establish a single-cell atlas of primary adenomas, recurrent adenomas, and paired normal mucosa, identify recurrence-associated cell subpopulations and transcriptional pathways, and construct a risk prediction model for recurrence (integrating multi-omics features and clinical variables). Ultimately, we propose a panel of biomarkers that can be used to optimize follow-up strategies and guide potential microbiome-based interventions. Under the premise of meeting routine clinicopathological requirements, we will collect tissue samples from 30 patients with colorectal adenomas. Each collected adenoma sample will be divided into three equal portions for scRNA-seq, scATAC-seq, and microbiome diversity sequencing, respectively. Two years after sampling, enrolled patients will undergo follow-up colonoscopy. Those in whom adenomas are detected will be classified as the recurrence group, while those without adenomas will be classified as the non-recurrence group. Sequencing data will be jointly analyzed in conjunction with clinical medical records. The tissue specimens obtained will not affect routine diagnosis or treatment outcomes.

Irritable Bowel Syndrome (IBS) is a common functional bowel disorder with complex and not yet fully elucidated pathophysiological mechanisms. Recent research suggests that gut microbiota dysbiosis, particularly small intestinal bacterial overgrowth (SIBO), may play a key role in the generation of IBS symptoms. However, the vast majority of current studies have focused on fecal samples, which primarily reflect the colonic microbiota. The small intestinal microbiota, which is directly involved in nutrient digestion and absorption and more prone to dysbiosis, remains understudied due to the challenges in obtaining samples.

The goal of this observational study is to explore the risk factors of fungal otitis externa in the fungal otitis externa patients The main question it aims to answer is: What behaviors lead to the occurrence of fungal otitis externa? Participants will complete a detailed questionnaire survey. If there is a comparison group: Researchers will compare the healthy group and the disease group to see if there are any differences.