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Acute cardiac dysfunction in patients with ovarian cancer treated with Niraparib due to TFAM mutation: A case series and functional analysis 因TFAM突变而接受尼拉帕尼治疗的卵巢癌患者的急性心功能障碍:病例系列和功能分析
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-25 DOI: 10.1016/j.cancergen.2025.05.006
Fei Liu , Wen Liu , Danya Li , Chunhua Tu , Xiaoping Peng , Yuan Wen

Background

Ovarian cancer is a leading cause of gynecological cancer mortality. Despite Niraparib's efficacy in increasing progression-free survival for recurrent ovarian cancer, its potential cardiotoxic effects are underexplored.

Objective

We performed a case series analysis involving two postmenopausal sisters who developed heart failure subsequent to Niraparib therapy for recurrent ovarian cancer.

Methods

Utilizing targeted next-generation sequencing (NGS), we identified a novel missense mutation c.98T>A in Mitochondrial Transcription Factor A (TFAM) gene, which was subsequently confirmed by Sanger sequencing. To investigate the cardiotoxic effects of Niraparib, we generated human induced pluripotent stem cell-derived cardiomyocytes (hiPSCCMs) carrying the identified mutation. The impact of the mutation on gene expression and protein levels was evaluated through real-time PCR and Western blot analyses.

Results

Two postmenopausal sisters treated with Niraparib suffered significant cardiac dysfunction. NGS identified a novel c.98T>A variant in TFAM gene, resulting in a missense mutation. HEK293T cells transfected with mutant plasmids demonstrated normal expression of full-length TFAM mRNA and protein. hiPSCCMs model revealed the variant alone did not induce cardiomyopathy. However, it predisposed to Niraparib-induced cardiomyopathy-like toxicity, mediated by metabolic dysregulation and increased cellular apoptosis

Conclusion

Our study revealed a novel TFAM variant which might induce potential cardiovascular toxicity of anticancer Niraparib therapies.
卵巢癌是妇科癌症死亡的主要原因。尽管Niraparib在提高复发性卵巢癌的无进展生存期方面有效,但其潜在的心脏毒性作用尚未得到充分研究。目的:我们对两名绝经后的姐妹进行了病例系列分析,她们在接受尼拉帕尼治疗复发性卵巢癌后出现心力衰竭。方法利用靶向新一代测序(NGS)技术,在线粒体转录因子a (TFAM)基因中发现了一个新的错义突变c.98T> a,并通过Sanger测序进行了验证。为了研究尼拉帕尼的心脏毒性作用,我们生成了携带该突变的人诱导多能干细胞衍生的心肌细胞(hiPSCCMs)。通过实时PCR和Western blot分析评估突变对基因表达和蛋白水平的影响。结果2例绝经后姐妹接受尼拉帕尼治疗后出现明显心功能障碍。NGS在TFAM基因中发现了一种新的c.98T>; a变异,导致错义突变。转染突变质粒的HEK293T细胞显示全长TFAM mRNA和蛋白的正常表达。hiPSCCMs模型显示,该变体本身不会诱发心肌病。然而,它更倾向于由代谢失调和细胞凋亡增加介导的尼拉帕尼诱导的心肌病样毒性。结论:我们的研究揭示了一种新的TFAM变异,它可能诱导抗尼拉帕尼治疗的潜在心血管毒性。
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引用次数: 0
Profiling of HER2, KRAS, and PIK3CA mutations in uterine cervical neuroendocrine carcinoma and implications for oncogenic driver targeting therapy HER2、KRAS和PIK3CA在子宫颈神经内分泌癌中的突变及其对肿瘤驱动靶向治疗的意义
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-24 DOI: 10.1016/j.cancergen.2025.05.005
Wan-Ru Chao , Ming-Yung Lee , Yi-Ju Lee , Gwo-Tarng Sheu , Hsiu-Hsiu Chiu , Huang-Pin Shen , Chih-Ping Han

Purpose

Dysregulated HER2-mediated RAS/MAPK and PI3K/AKT signaling drive uncontrolled cell growth and tumorigenesis. Following our prior report of frequent HER2 mutations in advanced uterine cervical neuroendocrine carcinoma (NEC), this study expands the genomic landscape by investigating KRAS and PIK3CA as potential therapeutic targets in a cohort of 12 Taiwanese women with cervical NEC.

Methods

We analyzed 12 histologically confirmed cervical NEC tumor samples from Taiwanese patients. Targeted next-generation sequencing (NGS) was performed using a custom Qiagen GeneRead DNAseq Targeted Panels V2, a clinically relevant tumor panel to detect mutations in key oncogenes. DNA was extracted from formalin-fixed, paraffin-embedded (FFPE) tissues, followed by variant analysis to identify pathogenic alterations.

Results

Beyond HER2 mutations (41.67 %, 5/12), we detected pathogenic alterations in KRAS (16.67 %, 2/12) and PIK3CA (16.67 %, 2/12) within the same cohort. Concurrent mutations were observed in HER2/KRAS (8.3 %, 1/12) and HER2/PIK3CA (8.3 %, 1/12), indicating potential cooperative effects.

Conclusion

This study identifies HER2, KRAS, and PIK3CA as potentially critical drivers in cervical NEC, with their co-occurrence highlighting the role of RAS/MAPK and PI3K/AKT pathways in pathogenesis. Dual pathway inhibition with multi-target therapies may enhance efficacy and address resistance in this aggressive, treatment-limited disease. Molecular profiling is essential for precision oncology, paving the way for validating these findings in larger cohorts and developing multi-pathway strategies to improve survival and quality of life.
目的her2介导的RAS/MAPK和PI3K/AKT信号失调可导致细胞生长和肿瘤发生失控。我们之前报道了晚期子宫颈神经内分泌癌(NEC)中频繁发生HER2突变,本研究通过研究KRAS和PIK3CA作为12名台湾宫颈NEC女性的潜在治疗靶点,扩大了基因组图谱。方法对台湾12例经组织学证实的宫颈NEC肿瘤标本进行分析。靶向下一代测序(NGS)使用定制的Qiagen GeneRead DNAseq Targeted Panels V2进行,这是一种临床相关的肿瘤面板,用于检测关键癌基因的突变。从福尔马林固定石蜡包埋(FFPE)组织中提取DNA,然后进行变异分析以确定致病性改变。结果在同一队列中,除了HER2突变(41.67%,5/12)外,我们还检测到KRAS(16.67%, 2/12)和PIK3CA(16.67%, 2/12)的致病性改变。在HER2/KRAS(8.3%, 1/12)和HER2/PIK3CA(8.3%, 1/12)中观察到并发突变,提示潜在的协同效应。本研究发现HER2、KRAS和PIK3CA是宫颈NEC的潜在关键驱动因素,它们的共同出现突出了RAS/MAPK和PI3K/AKT通路在发病机制中的作用。在这种侵袭性的、治疗有限的疾病中,双途径抑制与多靶点治疗可以提高疗效并解决耐药性。分子谱分析对精确肿瘤学至关重要,为在更大的队列中验证这些发现铺平了道路,并为提高生存率和生活质量制定了多途径策略。
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引用次数: 0
Corrigendum to “Omics approaches: Role in acute myeloid leukemia biomarker discovery and therapy” [Cancer Genetics, 2025, Volume: 292-293, Pages: 14-26/https://doi.org/10.1016/j.cancergen.2024.12.006] “组学方法:在急性髓性白血病生物标志物发现和治疗中的作用”的勘误表[癌症遗传学,2025,卷:292-293,页:14-26/https://doi.org/10.1016/j.cancergen.2024.12.006]
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-20 DOI: 10.1016/j.cancergen.2025.05.002
Fatemeh Sadat Shafiei , Saeid Abroun , Sadaf Vahdat , Mohammad Rafiee
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引用次数: 0
HRD status variation in consecutive tumour biopsies in a pan-cancer cohort: a descriptive single-center study including patients from the Phase 1 Unit, Copenhagen University Hospital, Rigshospitalet 在一项泛癌症队列中,连续肿瘤活检的HRD状态变化:一项描述性单中心研究,包括来自Rigshospitalet哥本哈根大学医院i期病房的患者
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-20 DOI: 10.1016/j.cancergen.2025.05.004
Rosa Damkjær Britton , Daniela Alosi , Luca Robinson , Ida Kappel Buhl , Iben Spanggaard , Martin Højgaard , Maj Kamille Kjeldsen , Maria Rossing , Ulrik Lassen , Kristoffer Staal Rohrberg

Background

Limited data on the evolution of homologous recombination deficiency (HRD) status within the course of disease increases the risk of inaccuracies in deciding on Poly(ADP-ribose) polymerase inhibitor therapy and questions the necessity for confirmatory biopsies in clinical trials. This study aims to assess HRD status over time and its role as a dynamic biomarker.

Methods

Genomic tumour profiles obtained from cancer patients in a Phase 1 Unit were retrospectively analysed. Patients with >1 tumour tissue sample and available genomic tumour profiles were included. HRD scores were assessed according to the method described by Telli et al. (2016).

Results

A total of 108 patients were included across 24 cancer diagnoses. A potential therapy-altering shift in HRD status was observed in 17 patients: 12 went from negative to positive HRD status whilst 5 went from positive to negative.

Discussion

When testing for HRD, sensitivity to normal tissue in tumour samples has proven more consequential than previously expected. Based on our findings, HRD status rarely changes over time, and changes in HRD scores may not reflect a genuine biological shift. Therefore, patients considered for clinical trials based on historic HRD status may not need confirmatory biopsies after intervening treatment, thereby sparing patients from unnecessary procedures.
背景:在疾病过程中同源重组缺陷(HRD)状态演变的有限数据增加了决定Poly(adp -核糖)聚合酶抑制剂治疗不准确的风险,并质疑在临床试验中进行确证性活检的必要性。本研究旨在评估HRD随时间的状态及其作为动态生物标志物的作用。方法回顾性分析1期临床癌症患者的基因组肿瘤谱。纳入了1份肿瘤组织样本和可用的肿瘤基因组图谱的患者。HRD评分根据Telli et al.(2016)描述的方法进行评估。结果24例肿瘤诊断共纳入108例患者。在17例患者中观察到HRD状态的潜在治疗改变:12例HRD状态从阴性变为阳性,5例HRD状态从阳性变为阴性。当HRD检测时,对肿瘤样本中正常组织的敏感性已被证明比先前预期的更为重要。根据我们的研究结果,HRD状态很少随时间变化,HRD评分的变化可能不能反映真正的生物学变化。因此,根据历史HRD状态考虑进行临床试验的患者在干预治疗后可能不需要确认性活检,从而使患者免于不必要的手术。
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引用次数: 0
Potential factors underlying the progression of RUNX1-mutated MDS to AML runx1突变MDS发展为AML的潜在因素
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-15 DOI: 10.1016/j.cancergen.2025.05.003
Anna Stengel, Katharina Hörst, Constanze Kühn, Manja Meggendorfer, Wolfgang Kern, Torsten Haferlach, Claudia Haferlach
This study explores the molecular distinctions between myelodysplastic neoplasms (MDS) and acute myeloid leukemia (AML) with RUNX1 mutations (RUNX1mut), aiming to elucidate factors influencing the progression from MDS to AML. Analyzing 1520 patients (773 AML and 747 MDS cases), RUNX1mut were present in 10 % of MDS and 13 % of AML cases. Interestingly, RUNX1mut were associated with higher blast counts in MDS, suggesting a potential role in disease progression. Despite similar overall survival across subgroups, significant differences in variant allele frequency (VAF) were observed, correlating with blast count. Our study highlights a unique genetic signature in both RUNX1mut MDS and AML: Cytogenetic analysis showed a higher frequency of normal karyotypes in RUNX1mut-MDS compared to RUNX1mut-AML. While only trisomy 8 was found in MDS, trisomies 8, 11, and 13 were detected in RUNX1mut-AML. Notably, MECOM rearrangements, KMT2A-PTD, and FLT3-ITD alterations were exclusive to RUNX1mut-AML. RUNX1 mutations were strongly associated with spliceosome gene mutations, especially in RUNX1mut-MDS. Copy neutral loss of heterozygosity (CN-LOH) involving RUNX1 was detected in 22 % of RUNX1mut-AML cases but was absent in RUNX1mut-MDS. These findings highlight the distinct genetic landscape of RUNX1mut-MDS and AML. Understanding these molecular determinants may enhance monitoring and early intervention strategies for MDS patients at risk of progression to AML.
本研究探讨骨髓增生异常肿瘤(MDS)与RUNX1突变的急性髓系白血病(AML)的分子差异,旨在阐明MDS向AML发展的影响因素。分析1520例患者(773例AML和747例MDS), 10%的MDS和13%的AML患者存在RUNX1mut。有趣的是,RUNX1mut与MDS中较高的细胞计数相关,提示其在疾病进展中的潜在作用。尽管亚组之间的总生存率相似,但观察到变异等位基因频率(VAF)的显著差异,与blast计数相关。我们的研究强调了RUNX1mut MDS和AML中独特的遗传特征:细胞遗传学分析显示,与RUNX1mut-AML相比,RUNX1mut-MDS中正常核型的频率更高。虽然在MDS中只发现了8三体,但在RUNX1mut-AML中检测到了8、11和13三体。值得注意的是,MECOM重排、KMT2A-PTD和FLT3-ITD改变是RUNX1mut-AML所独有的。RUNX1突变与剪接体基因突变密切相关,尤其是在RUNX1mut-MDS中。涉及RUNX1的拷贝中性杂合性缺失(CN-LOH)在22%的RUNX1mut-AML病例中检测到,但在RUNX1mut-MDS中不存在。这些发现突出了RUNX1mut-MDS和AML的独特遗传格局。了解这些分子决定因素可以加强MDS患者进展为AML风险的监测和早期干预策略。
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引用次数: 0
Glioma grade and mortality in relation to sequence variation in the mitochondrial genome 胶质瘤分级和死亡率与线粒体基因组序列变异的关系
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-05-12 DOI: 10.1016/j.cancergen.2025.05.001
Noah C. Peeri , Jamie K. Teer , Zachary J. Thompson , L. Burt Nabors , Marisa Brooks , Corneliu M. Sologon , Sion L. Williams , Kathleen M. Egan

Purpose

Glioma arises from glial cells and comprises ∼80 % of malignant adult brain tumors. The polymorphic mitochondrial genome plays a key role in maintaining redox homeostasis and generation of reactive oxygen species (ROS). ROS have a well-established role in glial tumors. We investigated associations between germline mtDNA variants and haplogroups with glioma grade and glioblastoma (GBM) survival.

Methods

We conducted germline mtDNA sequencing for 388 patients (300 Caucasians, 88 African Americans [AA]) with incident glioma (105 non-GBM, 283 GBM). Across all patients we identified 1431 homoplasmic mtDNA variants, including 692 variants observed only in Caucasians, 474 only in AAs, and 265 in both groups. We estimated Odds Ratios (OR) and 95 % Confidence Intervals (CI) for mtDNA common variants, haplogroups, and gene variant burden in relation to glioma grade and tertiles of survival in GBM patients. Bonferroni and Benjamini-Hochberg correction were applied for multiple comparisons.

Results

No mtDNA haplogroup was associated with glioma grade or patient survival in GBM. Common variants m.3010G>A, m.195T>C, and m.16189T>C were linked to lower-grade glioma risk. For GBM survival, m.1719G>A, m.14766T>C, m.16129G>A, and m.204T>C were associated with a poorer prognosis while variant m.73A>G was associated with an improved prognosis. A higher variant burden in MT-ND1 and MT-ND5 was associated with a better prognosis. No results remained statistically significant after correction.

Conclusion

This is the first comprehensive study of germline mtDNA sequence variation in relation to glioma grade at diagnosis and gliobastoma patient survival. Results warrant further study in larger populations and investigation of biologic mechanisms linking mtDNA polymorphism to these endpoints.
脑胶质瘤起源于神经胶质细胞,约占成人恶性脑肿瘤的80%。多态线粒体基因组在维持氧化还原稳态和活性氧(ROS)的产生中起着关键作用。活性氧在神经胶质肿瘤中有明确的作用。我们研究了种系mtDNA变异和单倍群与胶质瘤分级和胶质母细胞瘤(GBM)存活率之间的关系。方法对388例(白种人300例,非裔美国人88例[AA])脑胶质瘤患者(非GBM 105例,GBM 283例)进行种系mtDNA测序。在所有患者中,我们发现了1431个同质mtDNA变异,其中692个仅在白种人中观察到,474个仅在aa中观察到,265个在两组中都观察到。我们估计了mtDNA常见变异、单倍群和基因变异负担与胶质瘤级别和GBM患者生存分位数相关的比值比(OR)和95%置信区间(CI)。多重比较采用Bonferroni和Benjamini-Hochberg校正。结果mtDNA单倍群与胶质瘤分级或患者生存率无相关性。常见的m.3010G>A、m.195T>;C和m.16189T>;C与低度胶质瘤风险相关。对于GBM的生存,m.1719G>A、m.14766T>C、m.16129G>;A和m.204T>;C与预后较差相关,而m.73A>;G变体与预后改善相关。MT-ND1和MT-ND5较高的变异负担与较好的预后相关。校正后的结果没有统计学意义。结论本研究首次全面研究了种系mtDNA序列变异与胶质瘤分级诊断和胶质瘤患者生存之间的关系。结果需要在更大的人群中进行进一步的研究,并调查mtDNA多态性与这些终点的生物学机制。
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引用次数: 0
PLAU serves as a prognostic biomarker correlated with perineural invasion in HNSCC PLAU可作为与HNSCC神经周围浸润相关的预后生物标志物
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-04-27 DOI: 10.1016/j.cancergen.2025.04.008
Haimeng Yin , Zixiang Zhang , Qing Zhang , Yiwen You , Zhenxin Zhang , Yumo Han , Qicheng Zhang , Bo You
In head and neck squamous cell carcinoma (HNSCC), perineural invasion (PNI) is a distinctive clinicopathologic feature associated with poor survival. To improve patient prognosis, our investigation delved into the underlying mechanism of PNI in HNSCC, especially laryngeal cancer and hypopharyngeal carcinoma. Based on data from the Cancer Genome Atlas (TCGA), genes were categorized into two groups based on the presence or absence of PNI. Plasminogen activator urokinase (PLAU) was screened out as the key molecular. Next, a tissue microarray comprising 68 patients with HNSCC was used to explore the association between PLAU and nerve growth factor (NGF), a positive control of PNI. Then, the co-culture model and cell damage function experiments were used to investigate the carcinogenic effect of PLAU. CCK8 and Transwell assays confirmed the role of PLAU in promoting proliferation and metastasis. The PC12 neurite growth assay and the co-culture system suggested that PLAU influences malignant behaviors by facilitating PNI. Moreover, introducing small molecule compounds to impede PLAU and NGF can effectively revert tumor progression in vivo. PLAU promotes tumor malignancy by facilitating PNI in HNSCC, offering a novel reference for clarifying the molecular mechanisms underlying PNI and identifying potential therapeutic targets for HNSCC.
在头颈部鳞状细胞癌(HNSCC)中,神经周围浸润(PNI)是一个独特的临床病理特征,与生存率低相关。为了改善患者的预后,我们的研究深入探讨了PNI在HNSCC,特别是喉癌和下咽癌中的潜在机制。根据癌症基因组图谱(TCGA)的数据,基因根据PNI的存在与否被分为两组。筛选出纤溶酶原激活物尿激酶(PLAU)作为关键分子。接下来,研究人员利用68例HNSCC患者的组织芯片来探索PLAU与神经生长因子(NGF)之间的关系,NGF是PNI的阳性对照。然后,采用共培养模型和细胞损伤功能实验研究PLAU的致癌作用。CCK8和Transwell实验证实了PLAU在促进增殖和转移中的作用。PC12神经突生长试验和共培养系统表明PLAU通过促进PNI影响恶性行为。此外,引入小分子化合物来阻止PLAU和NGF可以有效地恢复体内肿瘤的进展。PLAU通过促进HNSCC中的PNI而促进肿瘤恶性,为阐明PNI的分子机制和确定HNSCC的潜在治疗靶点提供了新的参考。
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引用次数: 0
Mechanistic study of Liquiritigenin inhibiting bladder cancer cell proliferation and migration by regulating STING1 利尿原素通过调控sting - 1抑制膀胱癌细胞增殖和迁移的机制研究
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-04-27 DOI: 10.1016/j.cancergen.2025.04.007
Wuheng Li , Qiang Yin , Yihang Qiu , Jiasheng Liu , Jiaxin Wang , Chengxi Li , Dongchao Zhang , Peng Zhang , Haolong Lv , Yue Lv , Yongquan Wang
<div><h3>Background</h3><div>Bladder cancer (BLCA) is the most common malignant tumor in the urinary system, with a significantly higher incidence in men than in women, severely impacting quality of life. The STING1 gene (stimulator of interferon genes 1) plays a critical role in innate immunity by recognizing abnormal DNA and activating immune signaling pathways, promoting the expression of type I interferons and pro-inflammatory cytokines, thereby enhancing anti-tumor immune responses. Liquiritigenin (LQG), a flavonoid compound extracted from licorice, exhibits anti-inflammatory, antioxidant, and anti-cancer properties, capable of inhibiting tumor cell proliferation and invasion while regulating autophagy. This study aims to evaluate the role of LQG in regulating the STING1 gene and its anti-cancer mechanisms in bladder cancer.</div></div><div><h3>Methods</h3><div>This study employed a multidimensional approach, combining bioinformatics analysis with both in vitro and in vivo experimental validation. Bioinformatics was utilized to assess the expression, function, and immune-related analyses of the STING1 gene. In vitro experiments included CCK-8 assays and colony formation assays to evaluate cell proliferation; Transwell migration assays and wound healing assays to assess migratory capacity; flow cytometry to analyze apoptosis; and immunofluorescence to observe the accumulation of autophagosomes. Additionally, molecular docking analysis was conducted to explore the interaction between LQG and the STING protein, while Western blotting was used to elucidate key molecular pathways. In vivo studies employed a mouse xenograft tumor model to systematically evaluate the anti-tumor effects and safety of LQG.</div></div><div><h3>Results</h3><div>The results showed that STING1 expression was significantly lower in bladder cancer tissues compared to normal tissues. Functional enrichment analysis indicated a close relationship between STING1 and immune response regulation. High STING1 expression was positively associated with different types of immune cells and important immune checkpoints. Analysis of immunotherapy indicated that high STING1 expression was associated with favorable clinical responses. Molecular docking confirmed that LQG directly targets the STING protein. Experimental results demonstrated that LQG inhibits tumor cell survival by targeting STING and blocking autophagic flux. Additionally, LQG downregulated the expression of MMP2 and MMP9, inhibiting migration and invasion, while enhancing apoptosis by modulating Bcl-2, Bax, and caspase-3 levels.</div></div><div><h3>Conclusion</h3><div>These findings underscore the critical role of STING1 in the immunobiology of bladder cancer, indicating its potential as a therapeutic target and biomarker for immunotherapy. The novel STING agonist LQG has multiple anti-tumor effects, including the modulation of apoptosis, inhibition of invasion, and enhancement of immune responses. This paves the way for
膀胱癌(BLCA)是泌尿系统最常见的恶性肿瘤,男性的发病率明显高于女性,严重影响生活质量。STING1基因(干扰素基因1的刺激因子)通过识别异常DNA,激活免疫信号通路,促进I型干扰素和促炎细胞因子的表达,从而增强抗肿瘤免疫应答,在先天免疫中发挥关键作用。甘草素(Liquiritigenin, LQG)是一种从甘草中提取的类黄酮化合物,具有抗炎、抗氧化和抗癌的特性,能够抑制肿瘤细胞的增殖和侵袭,同时调节自噬。本研究旨在探讨LQG在膀胱癌中调控STING1基因的作用及其抗癌机制。方法采用多维度研究方法,结合生物信息学分析和体内外实验验证。利用生物信息学方法评估STING1基因的表达、功能和免疫相关分析。体外实验包括CCK-8测定和集落形成测定,以评估细胞增殖;跨井迁移试验和伤口愈合试验,以评估迁移能力;流式细胞术分析细胞凋亡;免疫荧光法观察自噬体的积累情况。此外,通过分子对接分析来探索LQG与STING蛋白之间的相互作用,并利用Western blotting来阐明关键的分子途径。体内研究采用小鼠异种移植肿瘤模型,系统评价LQG的抗肿瘤作用和安全性。结果结果显示,与正常组织相比,膀胱癌组织中STING1的表达明显降低。功能富集分析表明,STING1与免疫应答调节密切相关。高表达与不同类型的免疫细胞和重要的免疫检查点呈正相关。免疫治疗分析表明,高表达的STING1与良好的临床反应相关。分子对接证实LQG直接靶向STING蛋白。实验结果表明,LQG通过靶向STING,阻断自噬通量抑制肿瘤细胞存活。此外,LQG下调MMP2和MMP9的表达,抑制迁移和侵袭,同时通过调节Bcl-2、Bax和caspase-3水平促进细胞凋亡。结论这些发现强调了STING1在膀胱癌免疫生物学中的重要作用,表明其有潜力作为免疫治疗的靶点和生物标志物。新型STING激动剂LQG具有多种抗肿瘤作用,包括调节细胞凋亡、抑制侵袭、增强免疫应答等。这为未来sting靶向治疗膀胱癌铺平了道路。
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引用次数: 0
Metformin regulates ferroptosis in Skin cutaneous melanoma via ATF3/NRF2 axis 二甲双胍通过ATF3/NRF2轴调控皮肤黑色素瘤的铁下垂
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-04-26 DOI: 10.1016/j.cancergen.2025.04.006
Da Gu , Yulin Sun , Jianghui Wang , Jinpeng Sun , Huanmin Lou , Weiting Kang

Background

To explore the effects of metformin on the proliferation and ferroptosis of skin cutaneous melanoma (SKCM) and its potential molecular mechanisms, providing a new theoretical basis and strategy for the treatment of cutaneous melanoma.

Methods

The CCK-8 experiment was used to detect the effect of metformin on the proliferation of skin cutaneous melanoma cells. Kits were used to detect glutathione (GSH) content, reactive oxygen species (ROS), lipid peroxide (LPO), and malondialdehyde (MDA) levels to evaluate ferroptosis-related indicators. RNA-seq sequencing and related analyses were used to screen differentially expressed genes and explore their involved biological functions and signaling pathways. Western blot was used to detect the expression levels of ATF3 and NRF2 proteins and analyze the regulatory effect of metformin on the ATF3/NRF2 axis.

Results

Metformin significantly reduced the proliferation ability of skin cutaneous melanoma cells. The treated cells showed a decrease in GSH content and an accumulation of ROS, LPO, and MDA, suggesting that ferroptosis was regulated. RNA-seq analysis found 2068 differentially expressed genes, of which 897 were up-regulated and 1171 were down-regulated. The related pathways such as iron metabolism disorders and ferroptosis were activated. After metformin treatment, the expression of ATF3 mRNA in cells increased and was positively correlated with the concentration, while the expression in SKCM tissues decreased. At the same time, the expression of ATF3 protein increased and the expression of NRF2 protein decreased, suggesting that metformin may induce ferroptosis through the ATF3/NRF2 axis.

Conclusion

Metformin can induce ferroptosis by regulating ATF3/NRF2 axis, which may be a novel strategy for improving the treatment of skin cutaneous melanoma.
背景探讨二甲双胍对皮肤黑色素瘤(skin skin melanoma, SKCM)增殖和铁上落的影响及其可能的分子机制,为皮肤黑色素瘤的治疗提供新的理论依据和策略。方法采用CCK-8实验检测二甲双胍对皮肤黑色素瘤细胞增殖的影响。采用试剂盒检测谷胱甘肽(GSH)含量、活性氧(ROS)、过氧化脂质(LPO)和丙二醛(MDA)水平,评价铁中毒相关指标。采用RNA-seq测序及相关分析筛选差异表达基因,探讨其相关生物学功能和信号通路。Western blot检测ATF3和NRF2蛋白的表达水平,分析二甲双胍对ATF3/NRF2轴的调控作用。结果二甲双胍显著降低皮肤黑色素瘤细胞的增殖能力。处理后的细胞GSH含量下降,ROS、LPO和MDA积累,表明铁下垂受到调节。RNA-seq分析发现2068个差异表达基因,其中上调897个,下调1171个。铁代谢紊乱、铁下垂等相关通路被激活。二甲双胍处理后,细胞中ATF3 mRNA的表达增加,且与浓度呈正相关,而SKCM组织中表达减少。同时,ATF3蛋白表达升高,NRF2蛋白表达降低,提示二甲双胍可能通过ATF3/NRF2轴诱导铁下垂。结论二甲双胍可通过调节ATF3/NRF2轴诱导铁下垂,可能是改善皮肤黑色素瘤治疗的新策略。
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引用次数: 0
Rab5if is a potential therapeutic target of NSCLC Rab5if是NSCLC的潜在治疗靶点
IF 1.4 4区 医学 Q4 GENETICS & HEREDITY Pub Date : 2025-04-24 DOI: 10.1016/j.cancergen.2025.04.005
Linjuan Lu , Lixiu Chen , Feng Gao , Chunming Xu , Chen Ni , Wenxia Qian

Purpose

Due to disease progression and drug resistance, non-small cell lung cancer(NSCLC) mortality remains high, and the study of new targets that can inhibit tumor growth is very necessary. The purpose of this study was to investigate the role of Rab5if in the occurrence and development of NSCLC and explore its potential role in the treatment of NSCLC.

Materials and Methods

Rab5if overexpression and knockdown non-small cell lung cancer cell lines were constructed by lentivirus. Cellular assays were conducted to assess the impact of Rab5if on the functionality of lung cancer cells, The mechanism by which Rab5if influences the function of lung cancer cells was confirmed through Western blot analysis. The in vivo experiment was used to further verify the results of the in vitro experiment.

Results

Bioinformatics research found Rab5if mRNA increased in patients with NSCLC. Increased mRNA and protein levels of Rab5if were confirmed in local human NSCLC tissues. Knockdown of Rab5if in NSCLC cell lines by lentivirus significantly inhibited cell vigour, propagation and migration. In addition, mitochondrial function was impaired in lung cancer cells after Rab5if knockdown. In contrast, Rab5if overexpression promoted the proliferation and migration of NSCLC. Moreover, the impact Rab5if on the function of lung cancer cells was realized through the AKT-mTOR pathway. In the in vivo study, growth inhibition were observed in lung cancer xenografts transfected with Rab5if shRNA in nude mice. Similarly, xenografts of nude mice overexpressing Rab5if grew rapidly. The same pathway as in vitro was confirmed in vivo.

Conclusion

Rab5if is expected to be a novel therapeutic target for NSCLC.
目的非小细胞肺癌(non-small cell lung cancer, NSCLC)由于疾病进展和耐药,死亡率居高不下,研究抑制肿瘤生长的新靶点是非常有必要的。本研究旨在探讨Rab5if在非小细胞肺癌发生发展中的作用,并探讨其在非小细胞肺癌治疗中的潜在作用。材料与方法利用慢病毒构建rab5if过表达、低表达非小细胞肺癌细胞系。通过细胞实验评估Rab5if对肺癌细胞功能的影响,通过Western blot分析证实Rab5if影响肺癌细胞功能的机制。采用体内实验进一步验证体外实验结果。结果生物信息学研究发现,Rab5if mRNA在NSCLC患者中表达升高。Rab5if mRNA和蛋白水平在人局部NSCLC组织中升高。慢病毒敲低Rab5if可显著抑制NSCLC细胞株的活力、增殖和迁移。此外,Rab5if敲低后,肺癌细胞线粒体功能受损。Rab5if过表达可促进NSCLC的增殖和迁移。Rab5if对肺癌细胞功能的影响是通过AKT-mTOR途径实现的。在体内研究中,转染Rab5if shRNA的裸鼠肺癌异种移植物生长受到抑制。同样,过表达Rab5if的裸鼠异种移植物生长迅速。在体内证实了与体外相同的途径。结论rab5if有望成为治疗非小细胞肺癌的新靶点。
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引用次数: 0
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Cancer Genetics
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