kinesins

驱动蛋白
  • 文章类型: Case Reports
    辅助治疗的应用显著提高了携带驱动基因突变的可切除非小细胞肺癌(NSCLC)患者的生存率。然而,一些携带RET等罕见基因突变的非小细胞肺癌患者的辅助靶向治疗仍存在争议,因为目前缺乏证实疗效的随机对照试验.在这份报告中,我们描述了1例58岁的IIIA期NSCLC患者接受了选择性淋巴结清扫术的全肺叶切除术.术后下一代测序显示患者存在罕见的KIF13A-RET融合。患者选择接受普雷替尼单一疗法的辅助治疗,并在手术后接受连续循环肿瘤DNA(ctDNA)监测。随访期间,尽管经历了剂量减少和不规则的药物依从性,患者仍实现了令人满意的27个月无病生存期(DFS).此外,ctDNA预测肿瘤复发比影像学技术早4个月。在复发后将贝伐单抗添加到原始方案中继续是有益的。Pralsetinib显示出有希望的疗效作为辅助治疗,而ctDNA分析为早期检测肿瘤复发提供了有价值的工具。通过利用有针对性的治疗和创新的监测技术,我们的目标是在未来改善NSCLC患者的预后和生活质量.
    The application of adjuvant treatment has significantly enhanced the survival of patients with resectable non-small cell lung cancer (NSCLC) carrying driver gene mutations. However, adjuvant-targeted therapy remains controversial for some NSCLC patients carrying rare gene mutations such as RET, as there is currently a lack of confirmed randomized controlled trials demonstrating efficacy. In this report, we describe the case of a 58-year-old man with stage IIIA NSCLC who underwent complete lobectomy with selective lymph node dissection. Postoperative next-generation sequencing revealed that the patient harbored a rare KIF13A-RET fusion. The patient elected to receive adjuvant treatment with pralsetinib monotherapy and underwent serial circulating tumor DNA (ctDNA) monitoring after surgery. During follow-up, despite experiencing dose reduction and irregular medication adherence, the patient still achieved a satisfactory disease-free survival (DFS) of 27 months. Furthermore, ctDNA predicted tumor recurrence 4 months earlier than imaging techniques. The addition of bevacizumab to the original regimen upon recurrence continued to be beneficial. Pralsetinib demonstrated promising efficacy as adjuvant therapy, while ctDNA analysis offered a valuable tool for early detection of tumor recurrence. By leveraging targeted therapies and innovative monitoring techniques, we aim to improve outcomes and quality of life for NSCLC patients in the future.
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  • 文章类型: Journal Article
    这项研究使用基于Kamlet-Abboud-Taft的溶剂效应模型对报告的Biginelli样反应进行了严格的重新评估。令人惊讶的是,在某些多组分反应中发现了结构错误分配,导致识别伪三组分衍生物,而不是预期的MCR加合物。尝试复制文献条件失败,促使重新考虑所描述的MCR和拟议的机制。电喷雾电离(串联)质谱,NMR,熔点,元素分析和单晶X射线分析暴露了报告的MCR的不准确性,并允许提出完整的催化循环。使用纯衍生物和“受污染”衍生物的生物学研究揭示了评估的生物测定中的独特特征。揭示了一种新的细胞作用机制,用于一种获得的伪三组分加合物,提示与已知的二氢嘧啶酮Monastrol作为Eg5抑制剂的相似性,通过形成单星状有丝分裂纺锤体来破坏有丝分裂。对接研究和RMSD分析支持这一假设。本文所述的发现强调了在几份报告中对结构分配进行严格重新审查和潜在更正的必要性。这项工作强调了在合成化学中严格表征和严格评估的重要性,敦促仔细重新评估与这些化合物相关的合成和生物活性。
    This study critically reevaluates reported Biginelli-like reactions using a Kamlet-Abboud-Taft-based solvent effect model. Surprisingly, structural misassignments were discovered in certain multicomponent reactions, leading to the identification of pseudo three-component derivatives instead of the expected MCR adducts. Attempts to replicate literature conditions failed, prompting reconsideration of the described MCRs and proposed mechanisms. Electrospray ionization (tandem) mass spectrometry, NMR, melting points, elemental analyses and single-crystal X-ray analysis exposed inaccuracies in reported MCRs and allowed for the proposition of a complete catalytic cycle. Biological investigations using both pure and \"contaminated\" derivatives revealed distinctive features in assessed bioassays. A new cellular action mechanism was unveiled for a one obtained pseudo three-component adduct, suggesting similarity with the known dihydropyrimidinone Monastrol as Eg5 inhibitors, disrupting mitosis by forming monoastral mitotic spindles. Docking studies and RMSD analyses supported this hypothesis. The findings described herein underscore the necessity for a critical reexamination and potential corrections of structural assignments in several reports. This work emphasizes the significance of rigorous characterization and critical evaluation in synthetic chemistry, urging a careful reassessment of reported synthesis and biological activities associated with these compounds.
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  • 文章类型: Case Reports
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  • 文章类型: Case Reports
    副神经节瘤是一种不太普遍的疾病,和仅分泌白细胞介素-6(IL-6)的副神经节瘤以前没有报道。一名64岁的男性患者带着发烧和心悸的主要投诉来到医院。峰值体温为38.7°C(101.66°F)。心率是110bpm,而血压在正常范围内。抗生素和抗病毒治疗无效。血IL-6、C反应蛋白(CRP)水平,碱性磷酸酶(ALP),血小板(PLT),谷氨酰转移酶(GGT),纤维蛋白原,D-二聚体均升高。传染病,自身免疫性疾病,和恶性血液病均被排除。近10年前,意外发现患者的腹膜后大肿块。幸运的是,定期随访后,过去10年没有出现特殊症状。这次入院后,进行PET-CT检查。在腹部和腹膜后区域的上部可见一个大的混杂密度肿块,并考虑了副神经节瘤的可能性。然而,血液和尿液儿茶酚胺及其代谢物包括肾上腺素的生化测定,去甲肾上腺素,3-甲氧基酪胺,甲氧基肾上腺素,甲氧基去甲肾上腺素,尽管多巴胺轻度升高,但扁桃酸和香草酸都在正常范围内。患者基因组DNA的全外显子组捕获和测序显示KIF1B基因编码位点的杂合突变(编码:NM_015047.3:c.460G>C,突变:p.Val1554Leu;染色体位置为chr1:10428570)。在KIF1B的该基因座处的突变以前没有报道过。患者拒绝手术治疗。因为肿块负担了包括胰腺在内的几个重要器官,手术的风险很高。然后向患者施用多沙唑嗪。服用多沙唑嗪后,症状迅速消失。体温在3天内恢复到正常范围。心率降至约90bpm。在接下来的日子里,IL-6,CPR,ALP,血小板,GGT纤维蛋白原,D-二聚体持续下降。服用多沙唑嗪63天后,IL-6水平完全正常。服药190天后,血红蛋白(Hb)和GGT水平也恢复到正常范围。发病1年后,病人再次接受了血液检查。包括IL-6在内的几乎所有血液指标均在正常范围内。
    Paraganglioma is a less prevalent disease, and paraganglioma with only secreting interleukin-6 (IL-6) has not been previously reported. A 64-year-old male patient came to the hospital with the chief complaints of fever and palpitations. The peak body temperature was 38.7°C (101.66°F). Heart rate was 110 bpm, while blood pressure was in the normal range. Antibiotics and antiviral therapies were ineffective. The levels of blood IL-6, C-reactive protein (CRP), alkaline phosphatase (ALP), platelets (PLT), glutamyltransferase (GGT), fibrinogen, and D-dimer were all elevated. Infectious diseases, auto-immune diseases, and hematological malignancy were all excluded. Nearly 10 years ago, a large retroperitoneal mass of the patient was detected by accident. Fortunately, there have been no special symptoms for the past 10 years after regular follow-up. After admission this time, PET-CT was performed. A large confounding density mass at the upper part of the abdominal and retroperitoneal area was seen, and the possibility of paraganglioma was considered. However, biochemical assays for blood and urine catecholamine and their metabolites including adrenaline, norepinephrine, 3-methoxytyramine, methoxyepinephrine, methoxynorepinephrine, and vanillylmandelic acid were all in normal range in spite of mild elevated dopamine with no significance. The whole-exome capture and sequencing of the genomic DNA of the patient showed a heterozygous mutation in the coding site of KIF1B gene (Coding: NM_015047.3:c.4660G>C, Mutation: p.Val1554Leu; chromosomal location was chr1: 10428570). The mutation at this locus of KIF1B has not been reported previously. The patient refused the surgical treatment. Because the mass burdens several important organs including the pancreas, the risk of surgery was high. Doxazosin was then administered to the patient. After taking doxazosin, the symptoms disappeared rapidly. Body temperature returned to normal range in 3 days. Heart rate decreased to approximately 90 bpm. In the following days, the levels of IL-6, CPR, ALP, platelets, GGT fibrinogen, and D-dimer continued to decrease. After 63 days of taking doxazosin, IL-6 level was completely normal. After 190 days of medication, hemoglobin (Hb) and GGT levels also returned to the normal range. After 1 year onset, the patient again underwent a blood test. Almost all blood indexes were in the normal range including IL-6.
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  • 文章类型: Case Reports
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  • 文章类型: Review
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  • 文章类型: Review
    新生儿缺氧缺血性脑病是一种常引起围产期窒息的临床现象。为了减轻继发性神经损伤,需要迅速进行初步评估和诊断,以确定符合治疗性低温的患者.然而,新生儿偶尔出现缺氧缺血性脑病的临床表现,但没有围产期窒息的显著危险因素。我们假设在有基因异常的病人中,这些异常的临床表现可能与缺氧缺血性脑病标准重叠,可能导致因果错误归因。我们回顾了210张符合卡尔加里新生儿重症监护病房中度至重度缺氧缺血性脑病当地方案标准的婴儿图表,艾伯塔省.所有符合治疗性低温标准的患者均符合该研究的条件。数据收集了怀孕和出生史,以及任何可用的遗传或代谢测试,包括微阵列,基因面板,全外显子组测序,和新生儿代谢筛查。28名患者接受了基因检测,如微阵列,全外显子组测序,或者基因小组,因为临床怀疑.28个病人中有10个有基因突变,包括CDKL5,丙酮酸脱氢酶,CFTR,CYP21A2,ISY1,KIF1A,KCNQ2,SCN9A,MTFMT,NPHP1。所有患者均缺乏支持中度至重度缺氧缺血性脑病诊断的显著危险因素。2例患者因明确的遗传病因而改变治疗。这项研究证明了确定遗传合并症作为新生儿缺氧缺血性脑病表型的潜在贡献者的重要性。当患者的临床表现不典型的缺氧缺血性脑病时,应考虑早期识别支持替代诊断的临床因素,并有助于治疗决策和预后预测。
    Neonatal hypoxic-ischemic encephalopathy is a clinical phenomenon that often results from perinatal asphyxia. To mitigate secondary neurologic injury, prompt initial assessment and diagnosis is needed to identify patients eligible for therapeutic hypothermia. However, occasionally neonates present with a clinical picture of hypoxic-ischemic encephalopathy without significant risk factors for perinatal asphyxia. We hypothesized that in patients with genetic abnormalities, the clinical manifestation of those abnormalities may overlap with hypoxic-ischemic encephalopathy criteria, potentially contributing to a causal misattribution. We reviewed 210 charts of infants meeting local protocol criteria for moderate to severe hypoxic-ischemic encephalopathy in neonatal intensive care units in Calgary, Alberta. All patients that met criteria for therapeutic hypothermia were eligible for the study. Data were collected surrounding pregnancy and birth histories, as well as any available genetic or metabolic testing including microarray, gene panels, whole-exome sequencing, and newborn metabolic screens. Twenty-eight patients had genetic testing such as microarray, whole-exome sequencing, or a gene panel, because of clinical suspicion. Ten of 28 patients had genetic mutations, including CDKL5, pyruvate dehydrogenase, CFTR, CYP21A2, ISY1, KIF1A, KCNQ2, SCN9A, MTFMT, and NPHP1. All patients lacked significant risk factors to support a moderate to severe hypoxic-ischemic encephalopathy diagnosis. Treatment was changed in 2 patients because of confirmed genetic etiology. This study demonstrates the importance of identifying genetic comorbidities as potential contributors to a hypoxic-ischemic encephalopathy phenotype in neonates. Early identification of clinical factors that support an alternate diagnosis should be considered when the patient\'s clinical picture is not typical of hypoxic-ischemic encephalopathy and could aid in both treatment decisions and outcome prognostication.
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  • 文章类型: Case Reports
    目的:本文介绍了由于KIF5Ap.Arg1007Lys引起的肌萎缩侧索硬化症(ALS)的第一份报告,改变剪接的变体。方法:一例病例为54岁男性,出现进行性步态困难和不平衡,随后出现轻度帕金森病,痉挛,神经病,共济失调,和以皮层下额叶受累为主的认知障碍。脑MRI显示双侧顶叶明显萎缩。肌电图显示慢性弥漫性神经源性改变。由于他父亲的类似症状的阳性病史和其他10名家庭成员的ALS诊断,进行了广泛的基因检测。结果:GRN基因筛查,C9orf72,TARDBP,SOD1,FUS,MAPT突变,遗传性共济失调小组,平淡无奇。全外显子组测序显示c.3020G>A(p。Arg1007Lys)KIF5A基因中的突变,后来在两名受影响的亲属中得到证实。讨论:与之前关于KIF5A相关ALS的报告类似,我们的索引案例,病程温和,生存期延长。然而,由于即使在同一家庭成员中,进展速度和生存时间也有所不同,其他因素可能在起作用。此外,我们的索引案例和他的父亲显示了重叠的ALS特征,痉挛性截瘫,Charcot-Marie-Tooth病2型和额颞叶痴呆.因此,我们建议在鉴别诊断中考虑KIF5A突变,特别是在痉挛的重叠特征存在的情况下,神经病,小脑共济失调,和痴呆症。
    This paper presents the first report of amyotrophic lateral sclerosis (ALS) kindred due to the KIF5A p.Arg1007Lys, a splice-altering variant.
    An index case was a 54-year-old male who developed progressive gait difficulty and imbalance followed by mild parkinsonism, spasticity, neuropathy, ataxia, and cognitive impairment with predominant subcortical frontal involvement. Brain MRI showed marked bilateral parietal lobes atrophy. Electromyography demonstrated chronic diffuse neurogenic changes. Due to the positive history of similar symptoms in his father and the diagnosis of ALS in 10 other family members, extensive genetic testing was pursued.
    Genetic screening for GRN, C9orf72, TARDBP, SOD1, FUS, MAPT mutations, and hereditary ataxia panel, was unremarkable. Whole-exome sequencing revealed c.3020G > A (p.Arg1007Lys) mutation in the KIF5A gene, later confirmed in two affected relatives.
    Similar to previous reports on KIF5A-related ALS, our index case, had a mild disease course with prolonged survival. However, as the rate of progression and survival time differed even among the same family members, other factors were probably at play. Additionally, our index case and his father displayed features overlapping ALS, spastic paraplegia, Charcot-Marie-Tooth disease type 2, and frontotemporal dementia. Therefore, we suggest considering KIF5A mutations in the differential diagnosis, particularly in the presence of overlapping features of spasticity, neuropathy, cerebellar ataxia, and dementia.
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  • 文章类型: Case Reports
    1型肾-肝-胰腺发育不良(RHPD1)是一种罕见的偶发性和常染色体隐性遗传疾病,发病率未知。RHPD1是由NPHP3中的双等位基因致病变异体引起的,它编码肾细胞素,睫状蛋白复合物的重要组成部分。
    在这种情况下,我们描述了一名男性新生儿,他被超声证实患有多个囊肿的肾脏肿大,胰腺肿大伴囊肿,肝脏回声增强,导致RHPD的临床诊断。此外,复合杂合致病变异,即,NPHP3c.1761G>A(p。W587*)和c.69delC(p。Gly24Ala24*11)变体,被WES检测到。该患者在临床和遗传上被诊断为RHPD1。在34小时的生活,婴儿死于呼吸功能不全。
    这是中国首例RHPD1病例。由于NPHP3致病变体,这项研究扩大了RHPD1的已知范围。
    Renal-hepatic-pancreatic dysplasia type 1 (RHPD1) is a rare sporadic and autosomal recessive disorder with unknown incidence. RHPD1 is caused by biallelic pathogenic variants in NPHP3, which encode nephrocystin, an important component of the ciliary protein complex.
    In this case report, we describe a male newborn who was confirmed by ultrasound to have renal enlargement with multiple cysts, pancreatic enlargement with cysts, and increased liver echogenicity, leading to the clinical diagnosis of RHPD. In addition, a compound heterozygous pathogenic variant, namely, NPHP3 c.1761G > A (p. W587*) and the c.69delC (p. Gly24Ala24*11) variant, was detected by WES. The patient was clinically and genetically diagnosed with RHPD1. At 34 h of life, the infant died of respiratory insufficiency.
    This is the first published case of RHPD1 in China. This study broadens the known range of RHPD1 due to NPHP3 pathogenic variants.
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  • 文章类型: Case Reports
    The clinical data for a patient with primary lung adenocarcinoma complicated with pulmonary hamartoma, who admitted to Zunyi Medical University Hospital in September 2020, was retrospectively analyzed. The 62-years-old male visited outpatient service because of dysphagia in March 2015, and the pulmonary nodules were found. In September 2020, the computed tomography indicated the enlarged nodule in the lower lobe of left lung with lobulation, and there was ground glass nodule in the upper lobe of left lung. After thoracoscopic wedge surgery, the primary pulmonary adenocarcinoma in the upper lobe of left lung and pulmonary hamartoma in the lower lobe of left lung were confirmed by pathology. Whole exon sequencing revealed that kinesin family member 20B (KIF20B) gene was not expressed in lung adenocarcinoma, but was expressed in pulmonary hamartoma. The clinical manifestations of lung adenocarcinoma complicated with pulmonary hamartoma was not typical, which could locate in the same side and different sides of the lung. The imaging manifestations of the 2 kinds of tumors were diverse and can not be completely distinguished. The pathological examination after surgery is the gold standard, and the possibility of malignant transformation of pulmonary hamartoma should be warned.
    遵义医科大学附属医院于2020年9月收治的原发性肺腺癌合并肺错构瘤患者1例,男,62岁,以吞咽困难就诊。2015年3月发现肺结节于门诊规律随访,2020年9月胸部CT显示左肺下叶结节增大、有分叶,左肺上叶有磨玻璃结节影,行胸腔镜下楔形手术,术后病理确诊为左肺上叶原发性肺腺癌、左肺下叶肺错构瘤。全外显子组测序发现驱动蛋白20(kinesin family member 20B,KIF20B)基因在肺腺癌中无表达,在肺错构瘤中有表达。肺腺癌合并肺错构瘤的临床表现不典型,可位于同侧及对侧肺叶,两者影像学表现多样,不能完全区分,手术后的病理学检查是金标准,需警惕肺错构瘤恶变的可能。.
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