Publications by authors named "Bi-cheng Wang"

X-ray crystal diffraction has provided atomic-level structural information on biological macromolecules. Data quality determines the reliability of structural models. In most cases, multiple data sets are available from different crystals and/or collected with different experimental settings.

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Plant cell walls are largely composed of polysaccharide polymers, including cellulose, hemicelluloses (xyloglucan, xylan, mannan, and mixed-linkage β-1,3/1,4-glucan), and pectins. Among these cell wall polysaccharides, xyloglucan, xylan, mannan, and pectins are often -acetylated, and polysaccharide -acetylation plays important roles in cell wall assembly and disease resistance. Genetic and biochemical analyses have implicated the involvement of three groups of proteins in plant cell wall polysaccharide -acetylation: trichome birefringence-like (TBL)/domain of unknown function 231 (DUF231), reduced wall acetylation (RWA), and altered xyloglucan 9 (AXY9).

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Xylan is one of the major hemicelluloses in plant cell walls and its xylosyl backbone is often decorated at O-2 with glucuronic acid (GlcA) and/or methylglucuronic acid (MeGlcA) residues. The GlcA/MeGlcA side chains may be further substituted with 2-O-arabinopyranose (Arap) or 2-O-galactopyranose (Gal) residues in some plant species, but the enzymes responsible for these substitutions remain unknown. During our endeavor to investigate the enzymatic activities of Arabidopsis MUR3-clade members of the GT47 glycosyltransferase family, we found that one of them was able to transfer Arap from UDP-Arap onto O-2 of GlcA side chains of xylan, and thus it was named xylan 2-O-arabinopyranosyltransferase 1 (AtXAPT1).

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  • * Using data from six clinical trials with 140 ATC patients, the research found that patients had a median overall survival of 4.8 months and progression-free survival of 2.6 months when treated with TKIs, with response rates deemed low (9% objective response rate).
  • * The findings indicate that while TKIs showed some potential, they provided limited benefits, suggesting future research should explore combination therapies with chemotherapy, radiotherapy, or immunotherapy to improve treatment outcomes.
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  • Anaplastic thyroid cancer (ATC) typically lacks effective mutational driver genes, making chemotherapy the main treatment option, despite its limited benefits; this study focuses on analyzing data from prospective clinical trials since 2010.* -
  • Researchers reviewed six trials involving 232 patients, finding median overall survival at 6.0 months and progression-free survival at 3.2 months, with objective response rates of 21% and disease control rates of 64%.* -
  • While chemotherapy-based approaches showed some effectiveness against ATC, they did not significantly extend patient survival, highlighting the need for more effective and safer treatment options.*
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A member of the rice GT61 clade B is capable of transferring both 2-O-xylosyl and 2-O-arabinosyl residues onto xylan and another member specifically catalyses addition of 2-O-xylosyl residue onto xylan. Grass xylan is substituted predominantly with 3-O-arabinofuranose (Araf) as well as with some minor side chains, such as 2-O-Araf and 2-O-(methyl)glucuronic acid [(Me)GlcA]. 3-O-Arabinosylation of grass xylan has been shown to be catalysed by grass-expanded clade A members of the glycosyltransferase family 61.

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As a novel tyrosine kinase inhibitor (TKI), pyrotinib can irreversibly block dual pan-ErbB receptors and has been used in the treatment of advanced or metastatic human epidermal growth factor receptor 2 (HER2)-positive breast cancer. However, there are limited data on the use of pyrotinib in early breast cancer. Therefore, the present meta-analysis was conducted to evaluate the safety and efficacy of pyrotinib in the neoadjuvant setting for patients with early-stage or locally advanced HER2-positive breast cancer.

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Background: Tyrosine kinase inhibitors (TKIs) contribute to the treatment of patients with anaplastic thyroid cancer (ATC). Although prospective clinical studies of TKIs exhibit limited efficacy, whether ATC patients benefit from TKI treatment in real-world clinical practice may enlighten future explorations. Therefore, we conducted this effective analysis based on real-world retrospective studies to illustrate the efficacy of TKI treatment in ATC patients.

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Background: Immunotherapy has revolutionized the treatment of hepatocellular carcinoma (HCC). However, whether adding immunotherapy to antiangiogenic therapy benefits patients with unresectable HCC (uHCC) more in the first-line setting remains controversial.

Objective: In this analysis, we compared the clinical outcomes of lenvatinib monotherapy with atezolizumab plus bevacizumab combination therapy in advanced uHCC in real-world clinical practice.

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Background: Novel-fosfamides (NFOs) belong to active metabolites of ifosfamide that bypass the generation of toxic byproducts. In this analysis, we aimed to comprehensively assess the benefits and risks of NFO monotherapy or in combination with doxorubicin (DOX) versus single-drug DOX in previously untreated patients with advanced soft-tissue sarcoma (ASTS).

Methods: Online PubMed, Web of Science, Embase, and Cochrane CENTRAL databases were systematically searched on April 26, 2022.

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Background: Sacituzumab govitecan (SG) is an antibody-drug conjugate that targets the human trophoblast cell-surface antigen 2 to deliver SN-38 to cancer cells. In this study, we assessed the efficacy and safety of SG in patients with relapsed or refractory metastatic triple-negative breast cancer (RM-TNBC).

Methods: For this integrated analysis, from inception to January 2, 2023, we searched PubMed, Web of Science, Embase, and Cochrane library databases for prospective studies that evaluated SC in RM-TNBC patients.

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Radiation-related nasopharyngeal necrosis (RRNN) is a rare and often fatal complication in patients with nasopharyngeal carcinoma (NPC). Currently, no standard treatments are recommended for RRNN. The effects of traditional conservative treatments are suboptimal, and surgery for RRNN cannot be performed by inexperienced doctors.

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Background: Adebrelimab showed excellent efficacy in the first-line treatment for extensive-stage small-cell lung cancer (ES-SCLC). However, whether adebrelimab is superior to durvalumab and atezolizumab remains unclear. Therefore, we, in this study, aimed to compare the survival data of adebrelimab (CAPSTONE-1 trial) with durvalumab (CASPIAN trial) and atezolizumab (IMpower133 trial) in the first-line setting of ES-SCLC patients.

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Background: The predictive effects of liver metastases for immune-checkpoint inhibitors (ICIs) and the relationship between tumor mutational burden (TMB) and liver metastases (LM) remain unclear.

Methods: A systematic review and meta-analysis were conducted to explore the heterogeneity of ICIs efficacy between patients with or without LM. A pan-cancer cohort of 1,661 patients who received ICIs was downloaded and analyzed to assess the association between TMB and LM.

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Article Synopsis
  • Taxane chemotherapy is the standard treatment for advanced non-small cell lung cancer (NSCLC), but there's ongoing debate on the effectiveness of combining immunotherapy with chemotherapy compared to using either alone.
  • The study analyzed data from eight trials involving 4,398 patients to compare overall survival (OS) and progression-free survival (PFS) between various treatments, focusing on immunotherapy options like pembrolizumab.
  • Results showed that pembrolizumab 10 mg/kg had the best OS outcomes, while the combination of pembrolizumab 200 mg with docetaxel had the best PFS, suggesting these treatments could be more beneficial for NSCLC patients who haven't received immunotherapy yet.
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Background: Non-small-cell lung cancer (NSCLC) harboring human epidermal growth factor receptor 2 (HER2) exon 20 mutant occurs in 3% of NSCLCs. Targeted agents for this population remain an unmet need. In this analysis, we pooled-analyzed the efficacy and safety of poziotinib, a novel tyrosine kinase inhibitor, in HER2 exon 20 mutant NSCLC.

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Background: Immunotherapy has revolutionized the treatment of advanced lung cancer. Nevertheless, it remains unclear whether adding stereotactic body radiotherapy (SBRT) to immunotherapy (IT) further improves responses and survival outcomes. Therefore, in this pooled analysis, we comprehensively compared IT plus SBRT with IT alone in patients with advanced lung cancer.

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Background: Epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitor (TKI) monotherapy is the standard of care in treating advanced non-small cell lung cancer (NSCLC). Nevertheless, whether adding pemetrexed-based chemotherapy to EGFR-TKI targeted therapy furtherly prolongs survival outcomes and improves responses remains controversial. Therefore, we conducted this pooled analysis to compare the efficacy and tolerability between gefitinib plus pemetrexed-based chemotherapy and gefitinib alone in the first-line treatment of advanced NSCLC patients with mutated EGFR.

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  • UHRF1 is identified as an oncogene in thyroid cancer, with a specific focus on its role in promoting metastasis, which the study aims to investigate.
  • Experiments revealed that overexpressing UHRF1 enhances the metastatic ability of papillary thyroid cancer cells, while reducing its levels decreases metastasis in anaplastic thyroid cancer cells.
  • The study suggests that UHRF1 promotes metastasis through a pathway where it activates the transcription factor c-Jun/AP-1, leading to increased expression of IL-6 and MIF, indicating a potential new target for therapeutic intervention in thyroid cancer patients.
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Background: Adding induction chemotherapy to concurrent platinum-based chemoradiotherapy has significantly prolonged the survival time of patients with locoregionally advanced nasopharyngeal carcinoma. In this study, we intend to evaluate the survival outcomes, responses, and incidences of toxicities of induction chemotherapy and the differences between different strategies.

Methods: A comprehensive search was conducted in PubMed, Embase, Web of Science, and Cochrane CENTRAL on August 10, 2021.

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  • - Cemiplimab is recommended for treating locally advanced or metastatic cutaneous squamous cell carcinoma (CSCC), and a comparative analysis was conducted to assess its efficacy and safety across various studies.
  • - The analysis included 398 patients from three retrospective studies and 219 patients from three prospective studies, revealing objective response rates (ORRs) of 53% for retrospective studies and 45% for prospective studies.
  • - Although cemiplimab shows promise for treating CSCC, the study found higher incidences of treatment-related adverse events (TRAEs) in prospective studies, particularly fatigue, diarrhea, and pruritus, emphasizing the need for monitoring toxicities during treatment.
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Background: The prognosis of patients with relapsed Ewing sarcoma is poor. In this study, we aimed to pooled-analyze the efficacy and safety of the combination of irinotecan and temozolomide in treating patients with relapsed Ewing sarcoma.

Methods: PubMed, Cochrane CENTRAL, Web of Science, and EMBASE were systematically searched on September 27, 2021.

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Article Synopsis
  • The study aimed to find the best treatment strategy for locoregionally advanced nasopharyngeal carcinoma (LANPC) using Bayesian network analysis.
  • Data was gathered from randomized clinical trials comparing three treatment approaches: induction chemotherapy plus concurrent chemoradiotherapy (IC+CCRT), concurrent chemoradiotherapy followed by adjuvant chemotherapy (CCRT+AC), and concurrent chemoradiotherapy alone (CCRT).
  • The findings revealed that IC+CCRT outperformed CCRT significantly for various 5-year outcomes, suggesting it as the preferred treatment option, while CCRT+AC didn't significantly enhance survival compared to the other methods despite high survival rates.
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Background: Doxorubicin/Adriamycin (ADM) alone or combined with ifosfamide (IFO) (AI) is available for previously untreated advanced soft tissue sarcoma (ASTS). However, the clinical choice between them remains controversial. In this pooled analysis, we comprehensively compared the efficacy and tolerability of AI versus ADM in patients with ASTS.

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  • Olanzapine, an antipsychotic, is being used as part of antiemetic treatment for breast cancer patients experiencing nausea and vomiting from certain chemotherapy regimens.
  • A review of multiple studies found that patients receiving olanzapine showed significantly higher rates of complete response (no vomiting and no rescue medication) and no nausea compared to those receiving a placebo.
  • The findings suggest that olanzapine is an effective and cost-efficient option for managing chemotherapy-induced nausea and vomiting in breast cancer patients.
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