Publications by authors named "Sisi Qin"

The TopBP1-ATR axis is critical for maintaining genomic stability during DNA replication stress, yet the precise regulation of TopBP1 in replication stress responses remains poorly understood. In this study, we identified PHD and Ring Finger Domains 1 (PHRF1) as an important ATR activator through its interaction with TopBP1. Our analysis revealed a correlation between PHRF1 and genomic stability in cancer patients.

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Most patients with metastatic prostate cancer eventually develop resistance to primary androgen deprivation therapy. To identify predictive biomarker for Abiraterone acetate/prednisone resistance, we screened alternative splice variants between responders and non-responders from the PROMOTE clinical study and pinned down the most significant variant, CENPK-delta8. Through preclinical patient-derived mouse xenograft (PDX) and 3D organoids obtained from responders and non-responders, as well as in vitro models, aberrant CENPK-delta8 expression was determined to link to drug resistance via enhanced migration and proliferation.

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Article Synopsis
  • Cancer is the leading cause of death globally, with rare cancers having 230 unique subtypes that are hard to diagnose and treat due to their low occurrence rates.
  • This review discusses advanced diagnostic methods like new-generation sequencing and multi-omics, enhanced by artificial intelligence and machine learning, which have improved rare cancer diagnosis.
  • It also covers recent therapeutic advancements, including immunotherapy and targeted therapies, which have shown promise in clinical trials for improving patient survival and cancer remission, while addressing challenges in data interpretation and drug development.
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  • DNA repair is essential for cell health, preventing DNA damage that can lead to cancer; dysfunctions in this process are linked to cancer development.
  • Advances in targeted therapy, particularly with PARP1 inhibitors, show promise for treating breast cancer in patients with BRCA1/2 mutations, highlighting the importance of the DNA repair signaling pathway.
  • The review outlines current research on BRCA-related treatments, evaluations of various DNA repair inhibitors, and their clinical implications for different breast cancer subtypes, while also forecasting future developments in cancer therapy.
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Lung squamous cell carcinoma (LUSC) is a non-small cell lung cancer with a poor prognosis owing to late diagnosis. New molecular markers are urgently needed to improve the diagnosis and prognosis of LUSC. 7-Methylguanosine (mG) modifications, a tRNA modification, are common in eubacteria, eukaryotes, and a few archaea.

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  • * Phosphorylation, regulated by kinases and phosphatases, is key in the process of DSB repair, with a balance between their activities being crucial for maintaining genomic stability.
  • * Research highlights the importance of understanding kinases and phosphatases in DSB repair, as this knowledge could lead to new cancer therapies targeting these proteins.
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DNA damage is a double-edged sword in cancer cells. On the one hand, DNA damage exacerbates gene mutation frequency and cancer risk. Mutations in key DNA repair genes, such as breast cancer 1 () and/or breast cancer 2 (), induce genomic instability and promote tumorigenesis.

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In this study, a novel peroxydisulfate (PDS) activator (CF-nZVI-JE) was prepared via in-situ loading nano zero-valent iron (nZVI) on Juncus effusus (JE) followed with wrapping a layer of cellulose film (CF). The CF-nZVI-JE had the same 3D structure as the JE, being easy to separate from aqueous solution. The loaded nZVI existed single nanoparticles with a size of 60-100 nm except chain-type agglomeration of nanoparticles due to the stabilization of JE fibers.

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The cytochromes P450 (CYPs) represent a large gene superfamily that plays an important role in the metabolism of both exogenous and endogenous compounds. We have reported that the testis-specific Y-encoded-like proteins (TSPYLs) are novel gene transcriptional regulators. However, little is known of mechanism(s) by which TSPYLs regulate expression or the functional consequences of that regulation.

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Cytochrome P450s () display significant inter-individual variation in expression, much of which remains unexplained by known single-nucleotide polymorphisms (SNPs). Testis-specific Y-encoded-like proteins (s) are transcriptional regulators for several drug-metabolizing including However, transcription factors (TFs) that might influence expression through an effect on expression are unknown. Therefore, we studied regulators of expression in hepatic cell lines and their possible SNP-dependent variation.

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  • A study on patients with metastatic castration-resistant prostate cancer (mCRPC) investigated resistance mechanisms to the treatment abiraterone acetate/prednisone (AA/P), analyzing genetic data from 83 patients before and after 12 weeks of treatment.
  • Among the patients, 18 showed short-term responses and 11 long-term responses, while nonresponders exhibited low expression of the gene TGFBR3 and increased activity in the Wnt pathway and cell cycle.
  • The research identified potential drugs, such as topoisomerase inhibitors and cell cycle-targeting drugs, that could help overcome resistance to AA/P treatment.
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  • * The study focused on sulforaphane (SFN) and its effects on aquaporin-4 (AQP4) expression in mouse astrocytes, revealing that low SFN promotes cell growth while high levels inhibit it.
  • * Findings suggest that SFN enhances AQP4 expression and activates the p38 MAPK pathway, indicating a potential therapeutic role in improving protein clearance in neurodegenerative conditions.
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  • Kaiso, a transcription factor linked to tumor suppression, interacts with P120ctn and translocates from the nucleus to the cytoplasm when phosphorylated at T606 by AKT1.
  • Phosphorylated Kaiso (pT606-Kaiso) binds to 14-3-3 proteins, which are essential for its cytoplasmic accumulation and activation of the CDH1 gene, a known tumor suppressor.
  • Research indicates that reduced levels of pT606-Kaiso and CDH1 are common in human gastric cancer, suggesting impaired Kaiso phosphorylation may play a role in cancer development and progression.
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  • * Researchers analyzed gene expression data from tumor biopsies and patient-derived xenografts to find potential new drugs for these nonresponders, identifying three effective options: mitoxantrone, palbociclib, and PHA-793887.
  • * They also discovered an 11-gene panel linked to poor outcomes that could serve as biomarkers to help select appropriate treatments for abiraterone-resistant patients, suggesting a need for further clinical studies.
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  • - The shieldin complex, which works with 53BP1-RIF1, plays a key role in DNA double-strand break (DSB) repair by preventing the resection of DNA ends, facilitating a process called non-homologous end-joining.
  • - The SHLD2 subunit is crucial in this complex as it binds to single-stranded DNA and blocks further end resection, but the specific mechanism for processing this DNA was unclear until now.
  • - Researchers identified ASTE1, a protein that acts as a DNA endonuclease, which cuts single-stranded DNA, and found that its loss hampers DSB repair and promotes unwanted DNA processing; moreover, ASTE1 deficiency allows some
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The application of patient-derived xenografts (PDX) in drug screening and testing is a costly and time-consuming endeavor. While cell lines permit extensive mechanistic studies, many human breast cancer cell lines lack patient characteristics and clinical treatment information. Establishing cell lines that retain patient's genetic and drug response information would enable greater drug screening and mechanistic studies.

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  • Researchers found that a specific SNP (rs9940645) in the ZNF423 gene influences how cells respond to treatments like SERMs and potentially affects breast cancer therapy.
  • They used advanced techniques like RNA sequencing and proteomics to explore the pathways linked to ZNF423 and its SNP, discovering key signaling pathways related to cellular responses.
  • The study revealed that differences in the ZNF423 SNP genotype led to varying responses to metformin in breast cancer cell models, suggesting it might be useful as a biomarker to customize treatment strategies.
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The present study aimed to examine the psychological mechanism underlying the relationship between attachment style and intimate relationship satisfaction in women. For this purpose, a cross-sectional research design was employed in which 233 women ( = 28.16 years) who were currently in a romantic relationship completed a questionnaire that assessed attachment style, relationship satisfaction, self-esteem, and flexible goal adjustment (FGA).

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The DNA replication stress-induced checkpoint activated through the TopBP1-ATR axis is important for maintaining genomic stability. However, the regulation of TopBP1 in DNA-damage responses remains unclear. In this study, we identify the deubiquitinating enzyme (DUB) USP13 as an important regulator of TopBP1.

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  • Selective serotonin reuptake inhibitors (SSRIs) are commonly used to treat major depressive disorder (MDD), but only about half of patients benefit from them.
  • A study found a genetic variation in the ERICH3 gene linked to serotonin levels and SSRI effectiveness in various MDD trials, although how ERICH3 influences these outcomes was not fully understood.
  • Further investigations revealed that ERICH3 is highly present in brain cells and interacts with proteins involved in vesicle function, suggesting it may play a key role in serotonin processing which could affect antidepressant response.
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In this study, soybean root distribution in an inter-cropping system was influenced by various environmental and biotic cues. However, it is still unknown how root development and distribution in inter-cropping responds to aboveground light conditions. Herein, soybeans were inter- and monocropped with P (phosphorus) treatments of 0 and 20 kg P ha yr (P0 and P20, respectively) in field experiment over 4 years.

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  • Research investigated how silicon (Si) applied during soybean seedling growth affects resistance to lodging and enhances photosynthesis.
  • Si application at 200 mg kg notably increased net photosynthetic rates and chlorophyll content, while improving leaf weight and stomatal conductance.
  • The study found that Si also boosted the activity of specific enzymes linked to lignin biosynthesis, contributing to stronger plant cell walls and reduced shading stress in intercropping systems.
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Breast cancer is the most common invasive cancer in women worldwide. Functional follow-up of breast cancer genome-wide association studies has led to the discovery of genes that regulate endocrine therapy response in a SNP- and drug-dependent manner. Here, we will present four examples in which functional genomic studies from breast cancer clinical trials led to novel pharmacogenomic insights and molecular mechanisms of selective estrogen receptor modulators and aromatase inhibitors.

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Aims: Osteoporosis has been known to generally result from an imbalance between bone formation and resorption. Osteogenesis is the process of differentiation of mesenchymal stem cells (MSCs) into osteoblasts. Sirtuin6 (SIRT6) has been reported to mediate osteogenic differentiation (OD) in rat bone MSCs (rBMSCs).

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  • The study highlights how 5-methylcytosine (5mC) in mammalian DNA can be oxidized by TET enzymes to form 5-hydroxymethylcytosine (5hmC) and other derivatives, which are important for DNA demethylation.
  • While some 5hmC remains stable in the genome and helps maintain chromatin flexibility, its direct impact on gene transcription is not fully understood.
  • The researchers engineered a zinc-finger protein-based DNA dioxygenase (P16-TET) to enhance hydroxymethylation in cancer cells, discovering that while hydroxymethylated alleles are inactive, this modification may increase the likelihood of reactivating dormant methylated alleles.
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