Publications by authors named "Chris Zhang"

As a model system, the binding pocket of the L99A mutant of T4 lysozyme has been the subject of numerous computational free energy studies. However, previous studies have failed to fully sample and account for the observed changes in the binding pocket of T4 L99A upon binding of a congeneric ligand series, limiting the accuracy of results. In this work, we resolve the closed, intermediate, and open states for T4 L99A previously reported in experiment in MD and establish definitions for these states based on the dynamics of the system.

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Background: Bacillus Calmette-Guérin (BCG) is capable of enhancing the infiltration of immune cells into the tumour. However the temporal dynamics of immune cell patterns in patients receiving BCG instillation remains unclear.

Methods: Ninety-six patients who underwent intravesical BCG therapy, comprising 46 responders and 50 non-responders, were retrospectively enroled to explore the evolving immune landscape.

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The progression of hepatocellular carcinoma (HCC) is coincident with aberrant splicing of numerous tumor-related genes. Identification of the tumor-specific splice variants that facilitate HCC metastasis may provide a more comprehensive insight into the mechanisms of HCC metastasis. Through RNA sequencing and bioinformatic analyses, PPM1G was identified as a biomarker associated with HCC metastasis.

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Article Synopsis
  • The study investigated the use of normothermic machine perfusion (NMP) for improving outcomes in suboptimal deceased donor kidneys, specifically those from donors after circulatory death (DCD).
  • A total of 18 DCD kidneys were subjected to NMP for 1 to 3 hours before transplantation, which showed high feasibility, with most kidneys experiencing at least 1 hour of perfusion.
  • Results indicated a significantly lower rate of delayed graft function in kidneys that underwent NMP compared to control kidneys, while overall graft survival and function were similar over time, suggesting NMP is a safe and effective option for enhancing kidney transplant outcomes.
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  • - Micro-/nano-robots (MNRs) hold great promise for targeted medical therapies but face challenges like navigating blood flow, preventing their clinical application.
  • - Current dynamic models are limited to standard helical MNR designs, which do not apply universally to all MNRs.
  • - The paper introduces a new dynamic model that works for any type of MNR, validated through extensive simulations and experiments, which can enhance the design and performance of these robots in medical applications.
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Objective: This study focuses on the innovative application of Automated Machine Learning (AutoML) technology in cardiovascular medicine to construct an explainable Coronary Artery Disease (CAD) prediction model to support the clinical diagnosis of CAD.

Methods: This study utilizes a combined data set of five public data sets related to CAD. An ensemble model is constructed using the AutoML open-source framework AutoGluon to evaluate the feasibility of AutoML in constructing a disease prediction model in cardiovascular medicine.

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DNA-encoded library technology grants access to nearly infinite opportunities to explore the chemical structure space for drug discovery. Successful navigation depends on the design and synthesis of libraries with appropriate physicochemical properties (PCPs) and structural diversity while aligning with practical considerations. To this end, we analyze combinatorial library design constraints including the number of chemistry cycles, bond construction strategies, and building block (BB) class selection in pursuit of ideal library designs.

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  • Neoadjuvant immune checkpoint blockade combined with chemoradiotherapy shows promising results for patients with locally advanced esophageal squamous cell carcinoma, but the impact on the tumor immune microenvironment requires further study.
  • In a study of 41 patients, tissue samples were analyzed before and after treatment to observe changes in immune cell patterns, revealing that different immune responses are linked to pathologic complete response (pCR) status.
  • Results indicated that pCR patients had fewer CD86+ cells post-treatment, while non-pCR patients showed increased CD86+ cell density, highlighting the complex interactions of immune cells during therapy.
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The programmed death-ligand 1 (PD-L1) is a key mediator of immunosuppression in the tumor microenvironment. The expression of PD-L1 in cancer cells is useful for the clinical determination of an immune checkpoint blockade (ICB). However, the regulatory mechanism of the PD-L1 abundance remains incompletely understood.

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Introduction: Abnormal alternative splicing (AS) contributes to aggressive intrahepatic invasion and metastatic spread, leading to the high lethality of hepatocellular carcinoma (HCC).

Objectives: This study aims to investigate the functional implications of UPF3B-S (a truncated oncogenic splice variant) in HCC metastasis.

Methods: Basescope assay was performed to analyze the expression of UPF3B-S mRNA in tissues and cells.

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Clear cell renal cell carcinoma (ccRCC) is of poor clinical outcomes, and currently lacks reliable prognostic biomarkers. By analyzing the datasets of the Cancer Genome Atlas (TCGA) and the Clinical Proteomic Tumor Analysis Consortium (CPTAC), we established a five-protein prognostic signature containing GBP2, HLA-DRA, ISG15, ISG20 and ITGAX. Our data indicate that this signature was closely correlated with advanced stage, higher pathological grade, and unfavorable survivals in patients with ccRCC.

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Background: Brain stroke is a leading cause of disability and death worldwide, and early diagnosis and treatment are critical to improving patient outcomes. Current stroke diagnosis methods are subjective and prone to errors, as radiologists rely on manual selection of the most important CT slice. This highlights the need for more accurate and reliable automated brain stroke diagnosis and localization methods to improve patient outcomes.

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DNA-encoded libraries (DELs) provide the means to make and screen millions of diverse compounds against a target of interest in a single experiment. However, despite producing large volumes of binding data at a relatively low cost, the DEL selection process is susceptible to noise, necessitating computational follow-up to increase signal-to-noise ratios. In this work, we present a set of informatics tools to employ data from prior DEL screen(s) to gain information about which building blocks are most likely to be productive when designing new DELs for the same target.

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Background: The increasing use of anti-CD38 monoclonal antibodies (αCD38 mAbs) for newly diagnosed or early relapsed multiple myeloma (MM), especially in non-transplant eligible patients, may lead to more patients developing αCD38 mAb-refractory disease earlier in the treatment course with fewer treatment options.

Patients And Methods: We analyzed the efficacy and safety of selinexor-based triplets (selinexor+dexamethasone [Sd] plus pomalidomide [SPd, n = 23], bortezomib [SVd, n = 16] or carfilzomib (SKd, n = 23]) in a subset of STOMP (NCT02343042) and BOSTON (NCT03110562) study patients treated previously with αCD38 mAbs.

Results: Sixty-two patients (median 4 prior therapies, range 1 to 11, 90.

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Conceptual Introduction: To introduce the concept of cybernetical intelligence, deep learning, development history, international research, algorithms, and the application of these models in smart medical image analysis and deep medicine are reviewed in this paper. This study also defines the terminologies for cybernetical intelligence, deep medicine, and precision medicine.

Review Of Methods: Through literature research and knowledge reorganization, this review explores the fundamental concepts and practical applications of various deep learning techniques and cybernetical intelligence by conducting extensive literature research and reorganizing existing knowledge in medical imaging and deep medicine.

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Human microproteins encoded by long non-coding RNAs (lncRNA) have been increasingly discovered, however, complete functional characterization of these emerging proteins is scattered. Here, we show that LINC00493-encoded SMIM26, an understudied microprotein localized in mitochondria, is tendentiously downregulated in clear cell renal cell carcinoma (ccRCC) and correlated with poor overall survival. LINC00493 is recognized by RNA-binding protein PABPC4 and transferred to ribosomes for translation of a 95-amino-acid protein SMIM26.

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The biological function of many mitochondrial proteins in mechanistic detail has not been well investigated in clear cell renal cell carcinoma (ccRCC). A seven-mitochondrial-gene signature was generated by Lasso regression analysis to improve the prediction of prognosis of patients with ccRCC, using The Cancer Genome Atlas and Clinical Proteomic Tumor Analysis Consortium cohort. Among those seven genes, EFHD1 is less studied and its role in the progression of ccRCC remains unknown.

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Article Synopsis
  • * Data from 11 heavily pretreated patients indicate that selinexor (X) regimens show strong effectiveness and produce lasting responses, even when used later in treatment.
  • * X-containing regimens resulted in better overall response rates and longer progression-free survival compared to previous anti-BCMA treatments, highlighting their potential in addressing an ongoing treatment gap.
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Background: Little is known of the way in which stakeholders in surgical education perceive trainee workload.

Methods: A web-based survey examining the perception of current resident workload (as a percentage of daytime activities) was distributed to the faculty and residents in a Canadian general surgery residency program. The analysis compared the trainee and faculty responses against a 660-hour resident workload observation dataset.

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Objective: The complex workflow of surgical residents in the workplace-based learning environment makes interruptions an unavoidable aspect of clinical work. Interruptions have been shown to affect cognitive load, surgical performance, and medical error. The purpose of this study was to describe the effects of interruptions on surgical resident education.

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Background: UPK2 exhibits excellent specificity for urothelial carcinoma (UC). UPK2 evaluation can be useful in making the correct diagnosis of UC. However, UPK2 detection by immunohistochemistry (IHC) has relatively low sensitivity.

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Acupuncture therapy is one of the cornerstones in traditional Chinese medicine. It requires rich experiences from Chinese medicine practitioner. However, repeatability among different practitioners are low.

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Article Synopsis
  • Proteasome inhibitors, such as carfilzomib, enhance the effectiveness of selinexor, a new oral treatment, in battling multiple myeloma (MM) based on preclinical studies.
  • A clinical trial involving 32 patients assessed the safety, maximum-tolerated dose (MTD), and efficacy of selinexor combined with carfilzomib and dexamethasone, finding significant adverse effects but manageable under supportive care.
  • The combination treatment led to an impressive 78% overall response rate, with a median progression-free survival of 15 months, indicating that weekly XKd is both effective and well-tolerated for relapsed refractory MM patients.
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Background: Pathologic diagnosis of hepatocellular carcinoma (HCC) can be challenging in differentiating from benign and non-hepatocytic malignancy lesions. The aim of this study was to investigate the potential utility of α-fetoprotein (AFP) mRNA RNAscope, a sensitive and specific method, in the diagnosis of HCC.

Methods: Three independent retrospective cohorts containing 2216 patients with HCC, benign liver lesions, and non-hepatocytic tumours were examined.

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Clear cell renal cell carcinoma (ccRCC) is one of the most common malignancies with rapid growth and high metastasis, but lacks effective therapeutic targets. Here, using public sequencing data analyses, quantitative real-time PCR assay, western blotting, and IHC staining, we characterized that runt-related transcription factor 2 (Runx2) was significantly upregulated in ccRCC tissues than that in normal renal tissues, which was associated with the worse survival of ccRCC patients. Overexpression of Runx2 promoted malignant proliferation and migration of ccRCC cells, and inversely, interfering Runx2 with siRNA attenuates its oncogenic ability.

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