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RETRACTION: Fibroblast Growth Factor-2 Promotes Catabolism via FGFR1-Ras-Raf-MEK1/2-ERK1/2 Axis That Coordinates With the PKCδ Pathway in Human Articular Chondrocytes 回归:成纤维细胞生长因子-2 通过 FGFR1-Ras-Raf-MEK1/2-ERK1/2 轴促进分解代谢,该轴与人关节软骨细胞中的 PKCδ 通路相协调。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-08 DOI: 10.1002/jcb.30665

RETRACTION: D. Yan, D. Chen, and H.-J. Im, “Fibroblast Growth Factor-2 Promotes Catabolism via FGFR1-Ras-Raf-MEK1/2-ERK1/2 Axis That Coordinates With the PKCδ Pathway in Human Articular Chondrocytes,” Journal of Cellular Biochemistry 113, no. 9 (2012): 2856-2865, https://doi.org/10.1002/jcb.24160.

The above article, published online on 5 April 2012 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals LLC. The retraction has occurred due to concerns related to the data presented in the article raised by the Office of Research Compliance at Rush University Medical Center following an investigation jointly conducted by Rush University and the Jesse Brown Veterans Affairs Medical Center (JBVAMC). Specifically, image elements of the experimental data in Figures 2, 4 A and 5 C were found to have been used by the same author(s) for publication elsewhere in a different scientific context. The corresponding author, Dr. Hee-Jeong Im Sampen, has been informed of the decision to retract but did not agree with it, as she is confident that any errors in the publication do not impact the reliability of the paper's findings. She also advised the editors that she stands ready to cooperate fully to make any necessary corrections. However, the article is retracted as the editors lost trust in the accuracy of the data and consider the conclusions invalid.

撤回:D. Yan, D. Chen, and H.-J. Im, "Fibroblast Growth Factor-2 Promotes Catabolism via FGFR1-Ras-Raf-MEK1/2-ERK1/2 Axis That Coordinates With the PKCδ Pathway in Human Articular Chondrocytes," Journal of Cellular Biochemistry 113, no:2856-2865, https://doi.org/10.1002/jcb.24160.上述文章于 2012 年 4 月 5 日在线发表于 Wiley Online Library (wileyonlinelibrary.com),经期刊主编 Christian Behl 和 Wiley Periodicals LLC 协议,该文章已被撤回。撤稿的原因是拉什大学医学中心研究合规办公室在拉什大学和杰西-布朗退伍军人事务医疗中心(JBVAMC)联合开展调查后,对文章中提供的数据提出了质疑。具体而言,图 2、图 4 A 和图 5 C 中实验数据的图像元素被发现已被同一作者用于在其他不同科学背景下发表。通讯作者 Hee-Jeong Im Sampen 博士已被告知撤稿决定,但她并不同意撤稿,因为她相信发表中的任何错误都不会影响论文研究结果的可靠性。她还告知编辑,她随时准备全力配合进行必要的更正。然而,由于编辑们对数据的准确性失去了信任,并认为结论无效,因此文章被撤回。
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引用次数: 0
RETRACTION: Propofol-Induced miR-219-5p Inhibits Growth and Invasion of Hepatocellular Carcinoma Through Suppression of GPC3-Mediated Wnt/β-Catenin Signalling Activation 回放:丙泊酚诱导的 miR-219-5p 通过抑制 GPC3 介导的 Wnt/β-Catenin 信号激活抑制肝细胞癌的生长和侵袭。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-08 DOI: 10.1002/jcb.30652

RETRACTION: T. Gong, X. Ning, Z. Deng, M. Liu, B. Zhou, X. Chen, S. Huang, Y. Xu, Z. Chen, and R. Luo, “Propofol-Induced miR-219-5p Inhibits Growth and Invasion of Hepatocellular Carcinoma Through Suppression of GPC3-Mediated Wnt/β-Catenin Signalling Activation,” Journal of Cellular Biochemistry 120, no. 10 (2019): 16934-16945, https://doi.org/10.1002/jcb.28952.

The above article, published online on 19 May 2019 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals LLC. The retraction has been agreed due to concerns raised by third parties on the data presented in the article. Specifically, multiple areas of overlap were detected within and across Figures 1D, 2E and 2F. The authors acknowledged that unintentional mistakes were made during figure compilation and collaborated on the investigation into the detected issues. Even though they provided the raw data underlying the study, verification of the material's accuracy proved challenging due to the time elapsed since publication. As full accuracy of the provided material could no longer be ascertained, the editors have decided to retract the article, as they consider the identified issues to undermine the reliability of the presented research. The authors agree with the decision of retraction acknowledging that the identified issues may impact the overall interpretation of the research findings.

撤回:T. Gong, X. Ning, Z. Deng, M. Liu, B. Zhou, X. Chen, S. Huang, Y. Xu, Z. Chen, and R. Luo, "Propofol-Induced miR-219-5p Inhibits Growth and Invasion of Hepatocellular Carcinoma Through Suppression of GPC3-Mediated Wnt/β-Catenin Signalling Activation," Journal of Cellular Biochemistry 120, no:16934-16945, https://doi.org/10.1002/jcb.28952.上述文章于 2019 年 5 月 19 日在线发表于 Wiley Online Library (wileyonlinelibrary.com),经作者、期刊主编 Christian Behl 和 Wiley Periodicals LLC 协议,该文章已被撤回。之所以同意撤稿,是因为第三方对文章中提供的数据提出了疑虑。具体而言,在图 1D、2E 和 2F 内部和之间发现了多个重叠区域。作者承认在图表编辑过程中出现了无意的错误,并合作调查了所发现的问题。尽管他们提供了研究的原始数据,但由于发表时间已久,核实材料的准确性具有挑战性。由于无法再确定所提供材料的完全准确性,编辑决定撤回文章,因为他们认为所发现的问题有损于所提交研究的可靠性。作者同意撤稿决定,并承认所发现的问题可能会影响对研究结果的整体解释。
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引用次数: 0
RETRACTION: MiR-625-5p/PKM2 Negatively Regulates Melanoma Glycolysis State 返回:MiR-625-5p/PKM2 负向调节黑色素瘤的糖酵解状态。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-07 DOI: 10.1002/jcb.30651

RETRACTION: H. Zhang, C. Feng, M. Zhang, A. Zeng, L. Si, N. Yu, and M. Bai, “MiR-625-5p/PKM2 Negatively Regulates Melanoma Glycolysis State,” Journal of Cellular Biochemistry 120, no. 3 (2019): 2964–2972, https://doi.org/10.1002/jcb.26917.

The above article, published online on 30 November 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals LLC. The authors requested a retraction of this manuscript stating that different cell lines were wrongly labelled and that the conclusions of this manuscript needed to be re-evaluated. Further investigation by the publisher revealed that the article mentions use of the non-verifiable/unknown normal skin cells HFE. Additional flaws and inconsistencies between results presented and experimental methods described were identified. Furthermore, the experimental methods were found to lack sufficient details or have unavailable supporting data, making the experiments not comprehensible nor reproducible to readers. Accordingly, the editors consider the conclusions of this article to be invalid.

撤回:H. Zhang, C. Feng, M. Zhang, A. Zeng, L. Si, N. Yu, and M. Bai, "MiR-625-5p/PKM2 Negatively Regulates Melanoma Glycolysis State," Journal of Cellular Biochemistry 120, no.3 (2019): 2964-2972, https://doi.org/10.1002/jcb.26917.上述文章于 2018 年 11 月 30 日在线发表于 Wiley Online Library (wileyonlinelibrary.com),经作者、期刊主编 Christian Behl 和 Wiley Periodicals LLC 协议,该文章已被撤回。作者要求撤回该稿件,称不同细胞系的标记有误,需要重新评估该稿件的结论。出版商进一步调查后发现,文章中提到使用了无法验证/未知的正常皮肤细胞 HFE。此外,还发现了其他缺陷,以及所介绍的结果与实验方法之间的不一致。此外,还发现实验方法缺乏足够的细节或无法获得支持数据,使读者无法理解或复制实验。因此,编者认为这篇文章的结论无效。
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引用次数: 0
EXPRESSION OF CONCERN: Nrf2 Dependent Antiaging Effect of Milk-Derived Bioactive Peptide in Old Fibroblasts 表达关切:牛奶衍生生物活性肽对老年成纤维细胞的 Nrf2 依赖性抗衰老效应
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-07 DOI: 10.1002/jcb.30666

EXPRESSION OF CONCERN: N. Kumar, S. Reddi, S. Devi, S. B. Mada, R. Kapila, and S. Kapila, “Nrf2 Dependent Antiaging Effect of Milk-derived Bioactive Peptide in Old Fibroblasts,” Journal of Cellular Biochemistry 120, no. 6 (2019): 9677-9691, https://doi.org/10.1002/jcb.28246.

This expression of concern is for the above article, published online on 28 December 2018 in Wiley Online Library (wileyonlinelibrary.com), and has been agreed between the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals LLC. The expression of concern has been agreed upon due to concerns raised by a third party regarding the data presented in the article. Specifically, several panels in Figure 1B were found to originate from the same biological sample, yet were used to present different treatment groups. Furthermore, some of these panels had been previously published by the same author group in a different scientific context. As the identified issues do not undermine the study's conclusions, the editors have decided to issue this expression of concern to inform and alert readers.

关注表达:N. Kumar, S. Reddi, S. Devi, S. B. Mada, R. Kapila, S. Kapila,“Nrf2依赖性乳源性生物活性肽在老年成纤维细胞中的抗衰老作用”,《细胞生物化学杂志》,第120期。6 (2019): 9677-9691, https://doi.org/10.1002/jcb.28246.This对上述文章表示关注,该文章于2018年12月28日在线发表在Wiley在线图书馆(wileyonlinelibrary.com)上,并已由期刊主编Christian Behl;和Wiley期刊有限责任公司。由于第三方对文章中提供的数据提出了担忧,因此已同意表达担忧。具体来说,图1B中的几个面板来自相同的生物样本,但被用来表示不同的处理组。此外,其中一些小组以前曾由同一作者小组在不同的科学背景下发表过。由于发现的问题不会破坏研究的结论,编辑们决定发布这一关注表达,以告知和提醒读者。
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引用次数: 0
Lnc-Pim1 Promotes Neurite Outgrowth and Regeneration of Neuron-Like Cells Following ACR-Induced Neuronal Injury Lnc-Pim1促进神经元样细胞在ACR诱导的神经元损伤后的生长和再生
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-06 DOI: 10.1002/jcb.30659
He Li, Ruo yu Jiang, Ya jie Tang, Cong Ling, Fang Liu, Jia jun Xu

Decreased regenerative capacity of central nervous system neurons is the main cause for failure of damaged neuron regeneration and functional recovery. Long noncoding RNAs (lncRNAs) are abundant in mammalian transcriptomes, and many time- and tissue-specific lncRNAs are thought to be closely related to specific biological functions. The promoting effect of Pim-1 gene on neural differentiation and regeneration has been documented, but the effect and mechanism of its neighbor gene Lnc-Pim1 in regulating the response of central neurons to injury remain unclear. RT-PCR in this study demonstrated that the expression of Lnc-Pim1 was upregulated in acrylamide (ACR)-induced neuronal injury. FISH and nucleus-cytoplasmic assay demonstrated that Lnc-Pim1 was mainly expressed in the neuron cytoplasm, with a small amount in the nucleus. Western blot analysis proved that Lnc-Pim1 overexpression induced by the lentivirus vector could promote neurite outgrowth in Neuro-2a cells by activating the Erk1/2 signal pathway, and improve neurite regeneration of injured neurons by upregulating GAP-43 and β-Ⅲ tubulin protein expression. However, silencing Lnc-Pim1 expression by interfering RNA could effectively downregulate the GAP-43 and β-Ⅲ tubulin protein expression, and inhibit neurite growth of neurons. In addition, CHIRP-MS was performed to identify several potential targets of Lnc-Pim1 involved in the regulation of neurite regeneration of injured neurons. In conclusion, our study demonstrated that Lnc-Pim1 is a potential lnc-RNA, playing an important role in regulating central nerve regeneration.

中枢神经系统神经元再生能力下降是受损神经元再生和功能恢复失败的主要原因。长非编码 RNA(lncRNA)在哺乳动物转录组中含量丰富,许多具有时间和组织特异性的 lncRNA 被认为与特定的生物学功能密切相关。Pim-1基因对神经分化和再生的促进作用已被证实,但其邻近基因Lnc-Pim1对中枢神经元损伤反应的调控作用和机制仍不清楚。本研究的RT-PCR结果显示,Lnc-Pim1在丙烯酰胺(ACR)诱导的神经元损伤中表达上调。FISH和细胞核-细胞质检测表明,Lnc-Pim1主要在神经元细胞质中表达,少量在细胞核中表达。Western印迹分析证明,慢病毒载体诱导的Lnc-Pim1过表达可通过激活Erk1/2信号通路促进Neuro-2a细胞的神经元长出,并通过上调GAP-43和β-Ⅲ微管蛋白的表达改善损伤神经元的神经元再生。然而,通过干扰 RNA 沉默 Lnc-Pim1 的表达能有效下调 GAP-43 和 β-Ⅲ 管蛋白的表达,抑制神经元的神经元再生。此外,CHIRP-MS鉴定了Lnc-Pim1参与调控损伤神经元神经元再生的几个潜在靶点。总之,我们的研究表明,Lnc-Pim1是一种潜在的lnc-RNA,在调控中枢神经再生中发挥着重要作用。
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引用次数: 0
KDM4B Histone Demethylase Inhibition Attenuates Tumorigenicity of Malignant Melanoma Cells by Overriding the p53-Mediated Tumor Suppressor Pathway 抑制 KDM4B 组蛋白去甲基化酶可通过覆盖 p53 介导的抑瘤途径减轻恶性黑色素瘤细胞的致瘤性
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-10-02 DOI: 10.1002/jcb.30643
Arif Ul Hasan, Satoshi Serada, Sachiko Sato, Mami Obara, Sho Hirata, Yukako Nagase, Yukiko Kondo, Eiichi Taira

Despite significant advances in the treatment of cutaneous melanoma (hereafter melanoma), the prognosis remains less favorable due to therapeutic resistance, which is presumably linked to epigenetic dysregulation. We hypothesized that the histone lysine demethylase KDM4B could play a pivotal role in controlling therapy-resistant melanoma. To validate our hypothesis, we retrieved RNA sequencing data from the Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA) program and observed upregulation of KDM4B in both primary and metastatic melanoma, which was associated with poor survival. To explore its role, we used murine B16, human SK-MEL-5, and G-361 melanoma cells as in vitro models of melanoma. We found that KDM4B inhibition using NCGC00244536 increased global levels of H3K9me3 and downregulated the expressions of cell cycle progression–related genes Cdk1, Cdk4, Ccnb1, and Ccnd1. Moreover, genetic ablation of KDM4B or its chemical inhibition using NCGC00244536 reduced p53 production by upregulating MDM2, which enhances the proteolytic degradation of p53. Interestingly, despite the reduction of p53, these interventions augmented apoptosis and senescence-induced cell death by activating pathways downstream of p53, as evidenced by reduced levels of pro-survival Bcl-2 and Bcl-xL proteins and increased production of pro-apoptotic cleaved caspase-3, caspase-7, Bax, and the senescence inducer Cdkn1a. Compared to the FDA-approved anti-melanoma agent dacarbazine, NCGC00244536 exhibited more pronounced cytotoxic and antiproliferative effects in melanoma cells. Importantly, NCGC00244536 demonstrated minimal cytotoxicity to low Kdm4b-expressing mouse embryonic fibroblasts. In conclusion, our findings suggest that KDM4B inhibition can override the antitumor effect of p53, and potentially serve as a therapeutic strategy for melanoma.

尽管皮肤黑色素瘤(以下简称黑色素瘤)的治疗取得了重大进展,但由于耐药性的存在,预后仍不太乐观,这可能与表观遗传失调有关。我们假设组蛋白赖氨酸去甲基化酶 KDM4B 可能在控制耐药性黑色素瘤方面发挥关键作用。为了验证我们的假设,我们从基因表达总库(GEO)和癌症基因组图谱(TCGA)项目中检索了 RNA 测序数据,观察到 KDM4B 在原发性和转移性黑色素瘤中的上调,这与生存率低有关。为了探索其作用,我们使用小鼠 B16、人类 SK-MEL-5 和 G-361 黑色素瘤细胞作为黑色素瘤的体外模型。我们发现,使用 NCGC00244536 抑制 KDM4B 会增加 H3K9me3 的全局水平,并下调细胞周期进展相关基因 Cdk1、Cdk4、Ccnb1 和 Ccnd1 的表达。此外,基因消减 KDM4B 或使用 NCGC00244536 对其进行化学抑制,可通过上调 MDM2 减少 p53 的产生,而 MDM2 可增强 p53 的蛋白水解降解。有趣的是,尽管 p53 减少了,但这些干预措施通过激活 p53 下游通路,增加了细胞凋亡和衰老诱导的细胞死亡,这表现在促生存的 Bcl-2 和 Bcl-xL 蛋白水平降低,促凋亡的裂解 caspase-3、caspase-7、Bax 和衰老诱导剂 Cdkn1a 的产生增加。与美国 FDA 批准的抗黑色素瘤药物达卡巴嗪相比,NCGC00244536 对黑色素瘤细胞具有更明显的细胞毒性和抗增殖作用。重要的是,NCGC00244536 对低 Kdm4b 表达的小鼠胚胎成纤维细胞的细胞毒性很小。总之,我们的研究结果表明,KDM4B抑制可超越p53的抗肿瘤作用,有可能成为黑色素瘤的一种治疗策略。
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引用次数: 0
RETRACTION: Silencing of HAS2-AS1 Mediates PI3K/AKT Signaling Pathway to Inhibit Cell Proliferation, Migration, and Invasion in Glioma 回归:抑制 HAS2-AS1 通过 PI3K/AKT 信号通路抑制胶质瘤的细胞增殖、迁移和侵袭。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-09-30 DOI: 10.1002/jcb.30650

RETRACTION: Z. Zhao, T. Liang, and S. Feng,“Silencing of HAS2-AS1 Mediates PI3K/AKT Signaling Pathway to Inhibit Cell Proliferation, Migration, and Invasion in Glioma,” Journal of Cellular Biochemistry 120, no. 7 (2019): 11510-11516, https://doi.org/10.1002/jcb.28430.

The above article, published online on 20 February 2019 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals LLC. The retraction has been agreed due to concerns raised by third parties on the data presented in the article. Several flaws and inconsistencies between results presented and experimental methods described were found. Furthermore, image elements in Figure 4 were found to have been previously published in a different scientific context. Thus, the editors consider the conclusions of this article to be invalid. The authors have been informed of the decision of retraction but unavailable for a final confirmation.

撤回:Z. Zhao, T. Liang, and S. Feng, "Silencing of HAS2-AS1 Mediates PI3K/AKT Signaling Pathway to Inhibit Cell Proliferation, Migration, and Invasion in Glioma," Journal of Cellular Biochemistry 120, no:11510-11516, https://doi.org/10.1002/jcb.28430.The 上述文章于 2019 年 2 月 20 日在线发表于 Wiley Online Library (wileyonlinelibrary.com),经期刊主编 Christian Behl 和 Wiley Periodicals LLC 协议,已被撤回。同意撤稿的原因是第三方对文章中提供的数据提出了疑虑。我们发现文章中介绍的结果与实验方法之间存在若干缺陷和不一致之处。此外,还发现图 4 中的图像元素以前曾在不同的科学背景下发表过。因此,编辑认为这篇文章的结论无效。作者已被告知撤稿决定,但尚未得到最终确认。
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引用次数: 0
EXPRESSION OF CONCERN: Ap1 Mediates uPA/uPAR Induced FUT4 Expression and Trophoblast Invasion 表达关切:Ap1 介导 uPA/uPAR 诱导的 FUT4 表达和滋养层母细胞侵袭。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-09-30 DOI: 10.1002/jcb.30657

EXPRESSION OF CONCERN: Q. Zheng, Y. Yang, X. Cui, D. Zhang, S. Liu, and Q. Yan, “AP1 Mediates uPA/uPAR Induced FUT4 Expression and Trophoblast Invasion,” Journal of Cellular Biochemistry 119, no. 8 (2018): 6442-6451, https://doi.org/10.1002/jcb.26648.

This Expression of Concern is for the above article, published online on 26 December 2017 in Wiley Online Library (wileyonlinelibrary.com), has been issued by agreement between the journal Editor-in-Chief, Christian Behl; and Wiley Periodicals, LLC.

The Expression of Concern has been agreed due to concerns raised by third parties regarding the data presented in the article. Specifically, overlaps have been detected in the invasion assay images between the “uPAR+c-Fos siRNA” and “uPAR+TIIA” groups in Figure 5C. Further investigation by the publisher revealed additional overlaps in the migration assay images between the “uPAR+SP600125” and “uPAR+TIIA” groups in the same figure. The authors explained that these overlaps occurred due to errors during the figure assembly and provided revised images to correct the mistakes. However, the replacement images provided by the authors failed to reproduce the results of the originally published images. Consequently, the journal has decided to issue this Expression of Concern to inform and alert readers.

表达关注:Q. Zheng, Y. Yang, X. Cui, D. Zhang, S. Liu, and Q. Yan, "AP1 Mediates uPA/uPAR Induced FUT4 Expression and Trophoblast Invasion," Journal of Cellular Biochemistry 119, no:6442-6451, https://doi.org/10.1002/jcb.26648.This Expression of Concern 是针对 2017 年 12 月 26 日在线发表在 Wiley Online Library(wileyonlinelibrary.com)上的上述文章,已由期刊主编 Christian Behl 和 Wiley Periodicals, LLC 协议发布。之所以同意发布 Expression of Concern,是因为第三方对文章中提供的数据提出了担忧。具体而言,图 5C 中 "uPAR+c-Fos siRNA "组和 "uPAR+TIIA "组的侵袭试验图像中发现了重叠。出版商进一步调查后发现,图 5C 中 "uPAR+SP600125 "组和 "uPAR+TIA "组之间的迁移实验图像也有重叠。作者解释说,这些重叠是由于拼图过程中的错误造成的,并提供了修改后的图片以纠正错误。然而,作者提供的替换图片未能再现最初发表的图片的结果。因此,本刊决定发布本关注函,以告知和提醒读者。
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引用次数: 0
A Novel Assay Reveals the Early Setting-Up of Membrane Repair Machinery in Human Skeletal Muscle Cells 揭示人类骨骼肌细胞膜修复机制早期设置的新型检测方法
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-09-30 DOI: 10.1002/jcb.30662
Léna d'Agata, Phoebe Rassinoux, Céline Gounou, Flora Bouvet, Dounia Bouragba, Kamel Mamchaoui, Anthony Bouter

Defect in membrane repair contributes to the development of muscular dystrophies such as limb girdle muscular dystrophy (LGMD) type R2 or R12. Nevertheless, many other muscular dystrophies may also result from a defect in this process. Identifying these pathologies requires the development of specific methods to inflict sarcolemma damage on a large number of cells and rapidly analyze their response. We adapted a protocol hitherto used to study the behavior of cancer cells to mechanical constraint. This method is based on forcing the passage of cells through a thin needle, which induces shear stress. Due to size considerations, this method requires working with mononuclear muscle cells instead of myotubes or muscle fibers. Although functional sarcolemma repair was thought to be restricted to myotubes and muscle fibers, we show here that 24h-differentiated myoblasts express a complete machinery capable of addressing membrane damage. At this stage, muscle cells do not yet form myotubes, revealing that the membrane repair machinery is set up early throughout the differentiation process. When submitted to the shear-stress assay, these cells were observed to repair membrane damage in a Ca2+-dependent manner, as previously reported. We show that this technique is able to identify the absence of membrane resealing in muscle cells from patient suffering from LGMDR2. The proposed technique provides therefore a suitable method for identifying cellular dysregulations in membrane repair of dystrophic human muscle cells.

膜修复缺陷是肢腰肌营养不良症(LGMD)R2 型或 R12 型等肌肉萎缩症的发病原因。然而,许多其他肌肉萎缩症也可能是这一过程中的缺陷造成的。鉴别这些病症需要开发特定的方法,对大量细胞造成肌浆损伤,并快速分析它们的反应。我们对迄今为止用于研究癌细胞在机械约束下行为的方案进行了调整。这种方法的基础是迫使细胞通过细针,从而产生剪切应力。出于体积的考虑,这种方法需要使用单核肌肉细胞,而不是肌管或肌纤维。尽管功能性肌膜修复被认为仅限于肌管和肌纤维,但我们在此展示了 24 小时分化的肌母细胞表达的能够处理膜损伤的完整机制。在这一阶段,肌肉细胞尚未形成肌管,这表明膜修复机制在整个分化过程中很早就建立起来了。在进行剪切应力试验时,观察到这些细胞以 Ca2+ 依赖性方式修复膜损伤,这与之前的报道相同。我们的研究表明,这种技术能够识别 LGMDR2 患者肌肉细胞中膜再愈合功能的缺失。因此,所提出的技术提供了一种合适的方法,可用于鉴别肌营养不良人类肌肉细胞膜修复过程中的细胞失调。
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引用次数: 0
Assessing the Inhibitory Potential of Pregnenolone Sulfate on Pentraxin 3 in Diabetic Kidney Disease: A Molecular Docking and Simulation Study 评估孕烯醇酮硫酸盐对糖尿病肾病五肽 3 的抑制潜力:分子对接和模拟研究。
IF 3 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY Pub Date : 2024-09-30 DOI: 10.1002/jcb.30661
Soumik Das, Gnanasambandan Ramanathan

Diabetic Kidney Disease (DKD), a frequent consequence of diabetes, has substantial implications for both morbidity and mortality rates, prompting the exploration of new metabolic biomarkers due to limitations in current methods like creatinine and albumin measurements. Pentraxin 3 (PTX3) shows promise for assessing renal inflammation in DKD. This study investigates how DKD metabolites could influence PTX3 expression through molecular docking, ADMET profiling, and dynamic simulation. Network and pathway analyses were conducted to explore metabolite interactions with DKD genes and their contributions to DKD pathogenesis. Thirty-three DKD-associated metabolites were screened, using pentoxifylline (PEN) as a reference. The pharmacokinetic properties of these compounds were evaluated through molecular docking and ADMET profiling. Molecular dynamics simulations over 200 ns assessed the stability of PTX3 (apo), the PRE-PTX3 complex, and PEN-PTX3 across multiple parameters. Cytoscape identified 1082 nodes and 1381 edges linking metabolites with DKD genes. KEGG pathway analysis underscored PTX3's role in inflammation. Molecular docking revealed pregnenolone sulfate (PRE) with the highest binding affinity (−6.25 kcal/mol), followed by hydrocortisone (−6.03 kcal/mol) and 2-arachidonoylglycerol (−5.92 kcal/mol), compared to PEN (−5.35 kcal/mol). ADMET profiling selected PRE for dynamic simulation alongside PEN. Analysis of RMSD, RMSF, RG, SASA, H-bond, PCA, FEL, and MM-PBSA indicated stable complex behavior over time. Our findings suggest that increasing PRE levels could be beneficial in managing DKD, potentially through isolating PRE from fungal sources, synthesizing it as dietary supplements, or enhancing endogenous PRE synthesis within the body.

糖尿病肾病(DKD)是糖尿病的一种常见后果,对发病率和死亡率都有很大影响,由于肌酐和白蛋白测量等现有方法的局限性,促使人们探索新的代谢生物标志物。五羟色胺 3 (PTX3) 在评估 DKD 肾脏炎症方面显示出前景。本研究通过分子对接、ADMET 分析和动态模拟,研究了 DKD 代谢物如何影响 PTX3 的表达。研究还进行了网络和通路分析,以探索代谢物与 DKD 基因的相互作用及其对 DKD 发病机制的贡献。以戊乙福林(PEN)为参照物,筛选出了 33 种与 DKD 相关的代谢物。通过分子对接和 ADMET 分析评估了这些化合物的药代动力学特性。超过 200 ns 的分子动力学模拟评估了 PTX3(apo)、PRE-PTX3 复合物和 PEN-PTX3 在多个参数下的稳定性。Cytoscape 确定了 1082 个节点和 1381 条边,将代谢物与 DKD 基因联系起来。KEGG 通路分析强调了 PTX3 在炎症中的作用。分子对接显示硫酸孕烯醇酮(PRE)的结合亲和力最高(-6.25 kcal/mol),其次是氢化可的松(-6.03 kcal/mol)和 2-阿achidonoylglycerol(-5.92 kcal/mol),而 PEN 的结合亲和力为-5.35 kcal/mol。ADMET 分析选择 PRE 与 PEN 一起进行动态模拟。对 RMSD、RMSF、RG、SASA、H-键、PCA、FEL 和 MM-PBSA 的分析表明,随着时间的推移,复合物行为趋于稳定。我们的研究结果表明,通过从真菌中分离出 PRE、将其合成为膳食补充剂或增强体内内源性 PRE 的合成,提高 PRE 的水平可能对控制 DKD 有益。
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Journal of cellular biochemistry
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