Publications by authors named "Yichi Xu"

Background: Abnormal hedgehog (Hh) signaling is linked to preeclampsia (PE). This study aimed to identify Hh-related diagnostic biomarkers for PE and assess the role of immune infiltration.

Methods: The PE dataset was obtained from GEO to screen DEGs.

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With shifts in lifestyle and dietary habits, the incidence of colorectal cancer has been rising annually, with an increasing prevalence among younger populations, thereby imposing a significant burden on global health. Although the rate of early diagnosis for colorectal cancer has improved due to the widespread use of gastrointestinal endoscopy, many patients still do not experience substantial improvements in survival rates or quality of life. Consequently, there is a pressing need for further in-depth research into the pathogenesis of colorectal cancer, as well as the exploration of potential methods for early diagnosis and precise treatment.

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Chimeric antigen receptor (CAR) T cell therapy has shown promise in treating hematologic malignancies, but it still faces challenges, including high costs, a time-consuming manufacturing process, and the necessity of lymphodepletion. Here, we generate circular RNAs (circRNAs) encoding CAR proteins, referred to as circRNA, which mediates remarkable tumor killing in human primary T cells. We demonstrate that circRNA, delivered with immunocyte-tropic lipid nanoparticles (LNPs), can form in vivo panCAR cells (CAR-T, CAR-natural killer [NK], and CAR-macrophage), significantly inhibit tumor growth, and reshape the tumor microenvironment in mice.

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To address the rapid deterioration of fruit slices, soy protein isolate (SPI) and gelatin (GEL) composite films were optimized for food packaging using rosemary-modified bentonite (RB) as an active ingredient and glycerol as a plasticizer to enhance flexibility. Composite films with RB demonstrated superior ultraviolet-visible (UV-Vis) light barrier properties, increased opacity, and enhanced mechanical performance, achieving a tensile strength of 2.27 MPa.

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Studies have linked inhalation anesthesia and surgery to increased cognitive impairment, particularly in the elderly. Our previous research showed that isoflurane, but not desflurane, affected cognitive function in mice by modulating cyclophilin D (CypD), a key regulator of the mitochondrial permeability transition pore (mPTP) and mitochondrial function. Both anesthetics metabolize into trifluoroacetic acid (TFA), which is associated with cognitive deficits.

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Forty first-trimester human hearts were studied to lay groundwork for further studies of the mechanisms underlying congenital heart defects. We first sampled 49,227 cardiac nuclei from three fetuses at 8.6, 9.

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Illustrating molecular mechanisms of human embryonic development has always been one of the most significant challenges in biology. The scarcity of human embryo samples, the difficulty in dissecting embryo samples, and the complex structures of human organs are the major obstacles in studying human embryogenesis. In recent years, with the rapid advancement of single-cell technology, humans can systematically analyze the dynamic changes in differentiation at various stages of the central dogma and achieve observation and research with spatial information.

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Article Synopsis
  • - Preeclampsia (PE) is a common pregnancy complication linked to abnormal placental development, with mechanisms behind it still not fully understood.
  • - The study focused on DOCK1, a key molecule in cell processes, finding that reduced DOCK1 expression in placental cells leads to impaired vascular network formation, increased inflammation, and ultimately contributes to the progression of PE.
  • - Results indicated that deficiencies in DOCK1 can cause serious placental dysfunction, suggesting that targeting DOCK1 could be a potential treatment avenue for managing PE in future research.
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The placenta is essential organ for oxygen and nutrient exchange between the mother and the developing fetus. Trophoblast lineage differentiation is closely related to the normal function of the placenta. Trophoblast stem cells (TSCs) can differentiate into all placental trophoblast subtypes and are widely used as in vitro stem cell models to study placental development and trophoblast lineage differentiation.

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Recurrent spontaneous abortion (RSA) is a common pregnancy-related disorder. Cbl proto-oncogene like 1 (CBLL1) is an E3 ubiquitin ligase, which has been reported to vary with the menstrual cycle in the endometrium. However, whether CBLL1 is involved in the occurrence and development of RSA remains unclear.

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Inappropriate endometrial stromal decidualization has been implied as an important reason of many pregnancy-related complications, such as unexplained recurrent spontaneous abortion, preeclampsia, and intrauterine growth restriction. Here, we observed that thrombospondin-1, an adhesive glycoprotein, was significantly downregulated in endometrial decidual cells from patients with unexplained recurrent spontaneous abortion. The immortalized human endometrial stromal cell line was used to investigate the possible THBS1-mediated regulation of decidualization.

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Resveratrol is a polyphenolic compound with antioxidant and anti-inflammatory properties and therefore has potential health benefits for the prevention and treatment of a wide range of diseases, including cardiovascular disease, cancer, diabetes, and neurodegenerative diseases. The beneficial dose of resveratrol is between 30 and 150 mg. Although the health benefits of resveratrol have been extensively studied, resveratrol intake through the diet of residents in China remains unclear, which restricts the development of resveratrol-rich foods.

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Abnormal trophoblast function is associated with diseases such as recurrent spontaneous abortion, pre-eclampsia, and preterm birth, and endangers maternal and fetal health. However, the underlying regulatory mechanisms remain unclear. In this study, we found DOCK1 expression is decreased in the placental villi of patients with recurrent spontaneous abortion, and that its expression determined the invasive properties of extravillous trophoblasts (EVTs), highlighting a previously unknown role of DOCK1 in regulating EVT function.

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Signal transducer and activator of transcription 3 (STAT3), when phosphorylated at tyrosine 705, plays an important role in endometrial stromal cell decidualization and the receptivity of the endometrial epithelium during embryo implantation. However, the function of phosphorylated STAT3 (p-STAT3) in normal uterine receptivity is distinct from that in adenomyosis and endometriosis. In normal pregnancy, STAT3 phosphorylation in the endometrial epithelium determines the success of embryo implantation by regulating uterine receptivity.

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Uterine spiral artery remodeling is necessary for fetal growth and development as well as pregnancy outcomes. During remodeling, trophoblasts invade the arteries, replace the endothelium and disrupt the vascular smooth muscle, and are strictly regulated by the local microenvironment. Elevated glucose levels at the fetal-maternal interface are associated with disorganized placental villi and poor placental blood flow.

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The formation of sequential rosettes is a type of collective cell behavior recently discovered in the Caenorhabditis elegans embryo that mediates directional cell migration through sequential formation and resolution of multicellular rosettes involving the migrating cell and its neighboring cells along the way. Here, we show that a planar cell polarity (PCP)-based polarity scheme regulates sequential rosettes, which is distinct from the known mode of PCP regulation in multicellular rosettes during the process of convergent extension. Specifically, non-muscle myosin (NMY) localization and edge contraction are perpendicular to that of Van Gogh as opposed to colocalizing with Van Gogh.

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The early window of human embryogenesis is largely a black box for developmental biologists. Here we probed the cellular diversity of 4-6 week human embryos when essentially all organs are just laid out. On the basis of over 180,000 single-cell transcriptomes, we generated a comprehensive atlas of 313 clusters in 18 developmental systems, which were annotated with a collection of ontology and markers from 157 publications.

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Dysregulated trophoblast proliferation, invasion, and apoptosis may cause several pregnancy-associated complications, such as unexplained recurrent spontaneous abortion (URSA). Recent studies have shown that metabolic abnormalities, including glycolysis inhibition, may dysregulate trophoblast function, leading to URSA. However, the underlying mechanisms remain unclear.

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Heart development is controlled by a complex transcriptional network composed of transcription factors and epigenetic regulators. Mutations in key developmental transcription factor MESP1 and chromatin factors, such as PRC1 and cohesin components, have been found in human congenital heart diseases (CHDs), although their functional mechanism during heart development remains elusive. Here, we find that MESP1 interacts with RING1A/RING1, the core component of PRC1.

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Background: Large abdominal wall defect (LAWD) caused by shotgun wound is rarely reported.

Case Summary: Herein, we describe a case of LAWD caused by a gunshot wound in which the abdominal wall was reconstructed in stages, including debridement, tension-reduced closure (TRC), and reconstruction with mesh and a free musculocutaneous flap. During a 3-year follow-up, the patient recovered well without hernia or other problems.

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Time-lapse images of cells and tissues contain rich information of dynamic cell behaviors, which reflect the underlying processes of proliferation, differentiation and morphogenesis. However, we lack computational tools for effective inference. Here, we exploit Deep Reinforcement Learning (DRL) to infer cell-cell interactions and collective cell behaviors in tissue morphogenesis from 3D, time-lapse images.

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Nanoplastics (NPs), the emerging contaminants in recent years, widely distributed in the environment and are bioaccumulated and biomagnified in organisms through food chain. A growing number of studies have detected plastic particulates in human placenta and blood. However, few studies have focused on their effects during human pregnancy.

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Objective: To prepare adipose-derived stem cells (ADSCs)-embedded alginate-gelatinemicrospheres (Alg-Gel-ADSCs MSs) by electrospray and evaluate their feasibility for cartilage tissue engineering. To observe the efficacy of Alg-Gel-ADSCs MSs in repairing articular cartilage defects in SD rats.

Methods: ADSCs were isolated and characterized by performing induced differentiation and flow cytometry assays.

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