Publications by authors named "Yichao Gu"

Article Synopsis
  • Recurrent tracheoesophageal fistula (rTEF) is a rare but complex condition that can develop after initial esophageal atresia repair, with surgical challenges stemming from tissue adhesions and previous surgeries.
  • The study introduced two new localization methods for identifying rTEF during surgery and evaluated their effectiveness compared to traditional approaches.
  • Results showed that using localization techniques significantly reduced both operation time and postoperative recovery duration, leading to improved surgical outcomes for patients with rTEF.
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Article Synopsis
  • Managing refractory esophageal strictures (RES) after esophageal atresia (EA) repair is challenging, and the efficacy of endoscopic balloon dilation (EBD) for these cases has not been well-documented.
  • A study reviewing 87 EA patients treated with EBD found that 40.2% experienced recurrence of strictures, but 81.6% achieved long-term success after fewer than 20 dilations.
  • Key risk factors linked to poor outcomes included gastroesophageal reflux disease (GERD), long-gap esophageal atresia (LGEA), the eccentric shape of the stricture, and longer stricture length, while LGEA was also associated with a higher recurrence rate.
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Triclosan (TCS), an antimicrobial agent extensively incorporated into pharmaceuticals and personal care products, poses significant environmental risks because of its persistence and ecotoxicity. So far, a few microorganisms were suggested to degrade TCS, but the microbial degradation mechanism remains elusive. Here, a two-component angular dioxygenase (TcsAaAb) responsible for the initial TCS degradation was characterized in Sphingomonas sp.

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Cholestatic liver diseases (CLD) are characterized by impaired normal bile flow, culminating in excessive accumulation of toxic bile acids. The majority of patients with CLD ultimately progress to liver cirrhosis and hepatic failure, necessitating liver transplantation due to the lack of effective treatment. Recent investigations have underscored the pivotal role of the gut microbiota-bile acid axis in the progression of hepatic fibrosis via various pathways.

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Objective: To develop a machine learning diagnostic model based on MMP7 and other serological testing indicators for early and efficient diagnosis of biliary atresia (BA).

Methods: A retrospective analysis was conducted on patient information from those hospitalized for pathological jaundice at Beijing Children's Hospital between January 1, 2019, and December 31, 2023. Patients with serum MMP7, liver stiffness measurements, and other routine serological tests were included in the study.

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Importance: Type D esophageal atresia (EA) with tracheoesophageal fistula (TEF) is characterized by EA with both proximal and distal TEFs. It is a rare congenital anomaly with a very low incidence.

Objective: To investigate diagnostic and treatment strategies for this rare condition.

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Background And Aims: In gastric cancer, the response rate of programmed cell death protein-1 (PD-1) inhibitor is far from satisfactory, indicating additional nonredundant pathways might hamper antitumour immunity. V-domain immunoglobulin suppressor of T-cell activation (VISTA) has been reported in several malignancies as a novel immune-checkpoint. Nevertheless, the role of VISTA in gastric cancer still remains obscure.

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We report new Gaussian boson sampling experiments with pseudo-photon-number-resolving detection, which register up to 255 photon-click events. We consider partial photon distinguishability and develop a more complete model for the characterization of the noisy Gaussian boson sampling. In the quantum computational advantage regime, we use Bayesian tests and correlation function analysis to validate the samples against all current classical spoofing mockups.

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Coumarin (COU) is both a naturally derived phytotoxin and a synthetic pollutant which causes hepatotoxicity in susceptible humans. Microbes have potentials in COU biodegradation; however, its underlying genetic determinants remain unknown. sp.

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Importance: Neonatal appendicitis (NA) is a rare and potentially fatal neonatal disease. However, misdiagnosis is common owing to atypical clinical manifestations and non-specific laboratory tests.

Objective: The aim of this study was to summarize the clinical characteristics, treatments, and prognoses of infants with NA.

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Article Synopsis
  • Coumarin (COU) is a toxic chemical known for harming the liver and potentially causing cancer, but its microbial breakdown has not been well studied.
  • A specific strain of bacteria, Pseudomonas sp. strain NyZ480, can use COU as its only carbon source and can fully degrade it in optimal conditions (30℃, pH 7, 0.5 mM COU) within 4 hours.
  • The research identified intermediate products in COU degradation, including dihydrocoumarin, melilotic acid, and 3-(2,3-dihydroxyphenyl)propionate, and proposed that specific enzymes, possibly from a gene cluster similar to those in other
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Gaussian boson sampling (GBS) is not only a feasible protocol for demonstrating quantum computational advantage, but also mathematically associated with certain graph-related and quantum chemistry problems. In particular, it is proposed that the generated samples from the GBS could be harnessed to enhance the classical stochastic algorithms in searching some graph features. Here, we use Jiǔzhāng, a noisy intermediate-scale quantum computer, to solve graph problems.

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Article Synopsis
  • The 16S rRNA gene is commonly used to examine microbial diversity and evolutionary relationships, but it has significant limitations, including variable copy numbers and low taxonomic resolution.
  • A study of 24,248 prokaryotic genomes revealed copy numbers ranging from 1 to 37 in bacteria and highlighted intragenomic heterogeneity in 60% of genomes, affecting estimates of microbial diversity.
  • Researchers found that using the full-length 16S rRNA gene could overestimate diversity by 156.5%, while focusing on specific variable regions with adjusted thresholds could minimize such biases in microbial community assessments.
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Background: Biliary atresia (BA) is the most common form of severe neonatal obstructive jaundice. The etiology and pathogenesis of BA are multifactorial, and different factors may interact to produce heterogeneous pathological features and clinical outcomes. Despite different pathological features, all patients received the same treatment strategy.

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Purpose: Alimentary tract duplication involving the rectum (ATD-R) is rare. The purpose of the study was to describe the features of pediatric ATD-R patients and propose a surgical management strategy.

Methods: Nine consecutive children operated on for ATD-R at a tertiary center for pediatrics from January 2010 to June 2021 were retrospectively reviewed and followed up.

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Background: After repair of esophageal atresia (EA), children risk digestive and respiratory morbidity, but knowledge of their health-related quality of life (HRQOL) in China is lacking. The EA-QOL questionnaires were developed in Sweden and Germany to evaluate condition-specific HRQOL in children with EA aged 2-7 and 8-17. This study aimed to evaluate the linguistic and content validity of the Chinese Mandarin version of the EA-QOL questionnaires.

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Background: Biliary atresia (BA) is the most common cholestatic liver disease in neonates. Herein, we aimed at characterizing the gut microbiota and fecal bile acid profiles of BA patients, defining the correlations between them, and evaluating the relationship between the clinical pathogenesis and changes in the gut microbiota and bile acid profiles.

Methods: A total of 84 fecal samples from BA patients (n = 46) and matched healthy controls (HCs, n = 38) were subjected to sequencing by 16S rRNA gene amplification, and fecal bile acid were analyzed by targeted metabolomics.

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Purpose: To assess the growth status of children with recurrent tracheoesophageal fistula (rTEF), and determine the possible risk factors of growth retardation (GR).

Methods: The medical records of 83 patients with rTEF who underwent surgical repair were retrospectively analyzed. The patients were retrospectively divided into two groups according to whether they had GR.

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Purpose: We aim to share our experience of esophageal elongation by bougienage and delayed primary thoracoscopic anastomosis for pure esophageal atresia (EA) without tracheoesophageal fistula (TEF).

Methods: Fifteen patients with pure EA treated with delayed primary thoracoscopic anastomosis combined with or without esophageal elongation by bougienage were retrospectively analyzed.

Results: Four patients were managed without bougienage, and their surgical repair was performed thoracoscopically after natural esophageal growth.

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Matrix Gla protein (MGP) was originally reported as a physiological suppressor of ectopia calcification and has also been reported to be associated with cancer. However, the relation between the biological functions of MGP and the immune response in colorectal cancer (CRC) remains unclear. Here, we investigated the regulatory role of MGP in the immune microenvironment of CRC.

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Background: A duodenal web refers to partial or complete obstruction of the duodenum due to a membranous web. When looking at the serosal side of the intestine during duodenal web excision, especially during laparoscopic surgery, determining the web origin might be challenging. This study aimed to determine the efficacy of intraduodenum indocyanine green injection and near-infrared light during laparoscopic surgery in enhancing the ability to identify duodenal web localization.

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Background: Although thoracoscopic surgery has become the routine surgical method for esophageal atresia/tracheoesophageal fistula (EA/TEF), thoracoscopic treatment for recurrent tracheoesophageal fistula (rTEF) is far from popularized.

Objectives: We aimed to explore the safety and efficacy of thoracoscopic treatment for rTEF with a large-cohort study.

Methods: We retrospectively analyzed the clinical characteristics and outcomes of 103 consecutive patients who underwent thoracoscopic surgery for rTEF by one surgeon after EA/TEF repair at two different institutions in China from 2014 to 2021.

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Background: Esophageal pulmonary fistula is a special type of acquired tracheoesophageal fistula that occurs after esophageal atresia/tracheoesophageal fistula repair. Thoracotomy is the surgical repair method currently in use, but postoperative outcomes are unclear. Therefore, we aimed to explore the preliminary safety, effectiveness, and feasibility of thoracoscopic surgical repair of esophageal pulmonary fistula.

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