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Sozzi S, Manni I, Ercolani C, Diodoro MG, Bartolazzi A, Spallotta F, Piaggio G, Monteonofrio L, Soddu S, Rinaldo C, Valente D. Inactivation of HIPK2 attenuates KRAS G12D activity and prevents pancreatic tumorigenesis. J Exp Clin Cancer Res 2024; 43:265. [PMID: 39342278 PMCID: PMC11437985 DOI: 10.1186/s13046-024-03189-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 09/11/2024] [Indexed: 10/01/2024] Open
Abstract
BACKGROUND Pancreatic ductal adenocarcinoma (PDAC) features KRAS mutations in approximately 90% of human cases and excessive stromal response, termed desmoplastic reaction. Oncogenic KRAS drives pancreatic carcinogenesis by acting on both epithelial cells and tumor microenvironment (TME). We have previously shown that Homeodomain-Interacting Protein Kinase 2 (HIPK2) cooperates with KRAS in sustaining ERK1/2 phosphorylation in human colorectal cancers. Here, we investigated whether HIPK2 contributes to oncogenic KRAS-driven tumorigenesis in vivo, in the onset of pancreatic cancer. METHODS We employed an extensively characterized model of KRASG12D-dependent preinvasive PDAC, the Pdx1-Cre;LSL-KRasG12D/+ (KC) mice. In these mice, HIPK2 was inhibited by genetic knockout in the pancreatic epithelial cells (KCH-/-) or by pharmacologic inactivation with the small molecule 5-IodoTubercidin (5-ITu). The development of preneoplastic acinar-to-ductal metaplasia (ADM), intraepithelial neoplasia (PanIN), and their associated desmoplastic reaction were analyzed. RESULTS In Hipk2-KO mice (KCH-/-), ERK phosphorylation was lowered, the appearance of ADM was slowed down, and both the number and pathologic grade of PanIN were reduced compared to Hipk2-WT KC mice. The pancreatic lesion phenotype in KCH-/- mice was characterized by abundant collagen fibers and reduced number of αSMA+ and pSTAT3+ desmoplastic cells. These features were reminiscent of the recently described human "deserted" sub-TME, poor in cells, rich in matrix, and associated with tumor differentiation. In contrast, the desmoplastic reaction of KC mice resembled the "reactive" sub-TME, rich in stromal cells and associated with tumor progression. These observations were confirmed by the pharmacologic inhibition of HIPK2 in KC mice. CONCLUSION This study demonstrates that HIPK2 inhibition weakens oncogenic KRAS activity and pancreatic tumorigenesis providing a rationale for testing HIPK2 inhibitors to mitigate the incidence of PDAC development in high-risk individuals.
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Affiliation(s)
- Silvia Sozzi
- Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS Regina Elena National Cancer Institute, Rome, Italy
- Department of Science, Roma Tre University, Rome, Italy
| | - Isabella Manni
- SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Cristiana Ercolani
- Department of Pathology, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Maria Grazia Diodoro
- Department of Pathology, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Armando Bartolazzi
- Pathology Research Laboratories, Sant'Andrea University Hospital, Rome, Italy
| | - Francesco Spallotta
- Department of Biology and Biotechnologies "Charles Darwin", Sapienza University, Rome, Italy
| | - Giulia Piaggio
- SAFU Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Laura Monteonofrio
- Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Silvia Soddu
- Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Cinzia Rinaldo
- Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS Regina Elena National Cancer Institute, Rome, Italy.
- Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR), c/o Sapienza University, Rome, Italy.
| | - Davide Valente
- Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS Regina Elena National Cancer Institute, Rome, Italy.
- Institute of Molecular Biology and Pathology (IBPM), National Research Council (CNR), c/o Sapienza University, Rome, Italy.
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Chen H, Liu S, Wu S, Nong X, Liu N, Li L. GSG2 promotes progression of human endometrial cancer by regulating PD-1/PD-L1 expression via PI3K-AKT pathway. Int Immunopharmacol 2024; 134:112196. [PMID: 38759367 DOI: 10.1016/j.intimp.2024.112196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/05/2024] [Accepted: 04/30/2024] [Indexed: 05/19/2024]
Abstract
Cell cycle dysregulation leading to uncontrolled growth is a primary characteristic of malignancy. GSG2, a mitosis-related kinase, affects the normal cell cycle by interfering with the normal dissociation of centromere cohesion, and its overexpression has been shown to play an important role in cancer cells. Here, we investigated the function of GSG2 as a tumor promoter in endometrial carcinoma and its relationship with the immunological microenvironment. We used immunohistochemistry to identify a correlation between the development and prognosis of GSG2 and endometrial cancer. Cell and animal experiments confirmed that GSG2 has a protumorigenic phenotype in endometrial cancer cell lines. Furthermore, using GeneChip analysis and a tumor-immune coculture model, we observed a link between GSG2 expression and the composition of the immune microenvironment. Therefore, we concluded that the activation of the PI3K/AKT pathway by GSG2 may impact DNA repair, disrupt the cell cycle, and regulate the immune response, all of which could increase the ability of EC cells to proliferate malignantly. Consequently, it is anticipated that GSG2 will be a viable therapeutic target in endometrial carcinoma.
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Affiliation(s)
- Hong Chen
- Department of Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China.
| | - Shuxi Liu
- Department of Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Sikao Wu
- Department of Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Xianxian Nong
- Department of Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Naiyu Liu
- Department of Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, PR China
| | - Li Li
- Department of Gynecologic Oncology, Guangxi Medical University Affiliated Tumor Hospital, Nanning 530021, PR China.
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Gao Y, Ma B, Li Y, Wu X, Zhao S, Guo H, Wang Y, Sun L, Xie J. Haspin balances the ratio of asymmetric cell division through Wnt5a and regulates cell fate decisions in mouse embryonic stem cells. Cell Death Discov 2023; 9:307. [PMID: 37612272 PMCID: PMC10447528 DOI: 10.1038/s41420-023-01604-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/25/2023] [Accepted: 08/14/2023] [Indexed: 08/25/2023] Open
Abstract
Many different types of stem cells utilize asymmetric cell division (ACD) to produce two daughter cells with distinct fates. Haspin-catalyzed phosphorylation of histone H3 at Thr3 (H3T3ph) plays important roles during mitosis, including ACD in stem cells. However, whether and how Haspin functions in ACD regulation remains unclear. Here, we report that Haspin knockout (Haspin-KO) mouse embryonic stem cells (mESCs) had increased ratio of ACD, which cumulatively regulates cell fate decisions. Furthermore, Wnt5a is significantly downregulated due to decreased Pax2 in Haspin-KO mESCs. Wnt5a knockdown mESCs phenocopied Haspin-KO cells while overexpression of Wnt5a in Haspin-KO cells rescued disproportionated ACD. Collectively, Haspin is indispensable for mESCs to maintain a balanced ratio of ACD, which is essential for normal development and homeostasis.
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Affiliation(s)
- Yingying Gao
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Bin Ma
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Yifan Li
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Xiangyu Wu
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Shifeng Zhao
- Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Institute of Maternal-Fetal Medicine and Gynecologic Oncology, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Huiping Guo
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yiwei Wang
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Lihua Sun
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Jing Xie
- Fundamental Research Center, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
- Reproductive Medicine Center, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200092, China.
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Lan MS, Chen C. Small Molecules Targeting INSM1 for the Treatment of High-Risk Neuroblastoma. BIOLOGY 2023; 12:1134. [PMID: 37627018 PMCID: PMC10452524 DOI: 10.3390/biology12081134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/08/2023] [Accepted: 08/12/2023] [Indexed: 08/27/2023]
Abstract
Human neuroblastoma (NB) is the most common childhood extracranial tumor arising from the sympathetic nervous system. It is also a clinically heterogeneous disease that ranges from spontaneous regression to high-risk stage 4 disease. The cause of this disease remains elusive. However, the amplification of NMYC oncogene occurred in roughly 30% of NB patients, which strongly correlated with the advanced stage of disease subtype and the worse prognosis status. We discovered that N-Myc oncoprotein binds and activates INSM1, a zinc-finger transcription factor of neuroendocrine tumors. We also found that INSM1 modulates N-Myc stability mediated through PI3K/AKT/GSK3β signaling pathway. Therefore, INSM1 emerges as a critical co-player with N-Myc in facilitating NB tumor cell growth and sustaining the advanced stage of malignancy. Using an INSM1-promoter driven luciferase screening-platform, we have recently identified fifteen small molecules that negatively regulate INSM1 expression. Interestingly, the identified small molecules can be divided into four large groups of compounds such as cell signaling inhibitor, DNA/RNA inhibitor, HDAC inhibitor, and cardiac glycoside. These findings support the presence of a unique mechanism associated with INSM1 and N-Myc interplay, which is critical in regulating NB tumor cell growth. We discuss the feasibility of identifying novel or repurposing small molecules targeting INSM1 as a potential treatment option for high-risk NB.
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Affiliation(s)
- Michael S. Lan
- Department of Genetics, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA;
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Chauhan C, Kraemer A, Knapp S, Windheim M, Kotlyarov A, Menon MB, Gaestel M. 5-Iodotubercidin sensitizes cells to RIPK1-dependent necroptosis by interfering with NFκB signaling. Cell Death Discov 2023; 9:262. [PMID: 37495567 PMCID: PMC10372004 DOI: 10.1038/s41420-023-01576-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 07/28/2023] Open
Abstract
Receptor-interacting protein kinases (RIPK)-1 and -3 play crucial roles in cell fate decisions and are regulated by multiple checkpoint controls. Previous studies have identified IKK1/2- and p38/MK2-dependent checkpoints that phosphorylate RIPK1 at different residues to inhibit its activation. In this study, we investigated TNF-induced death in MAPK-activated protein kinase 2 (MK2)-deficient cells and found that MK2 deficiency or inactivation predominantly leads to necroptotic cell death, even without caspase inhibition. While RIPK1 inhibitors can rescue MK2-deficient cells from necroptosis, inhibiting RIPK3 seems to switch the process to apoptosis. To understand the underlying mechanism of this switch, we screened a library of 149 kinase inhibitors and identified the adenosine analog 5-Iodotubercidin (5-ITu) as the most potent compound that sensitizes MK2-deficient MEFs to TNF-induced cell death. 5-ITu also enhances LPS-induced necroptosis when combined with MK2 inhibition in RAW264.7 macrophages. Further mechanistic studies revealed that 5-ITu induces RIPK1-dependent necroptosis by suppressing IKK signaling in the absence of MK2 activity. These findings highlight the role for the multitarget kinase inhibitor 5-ITu in TNF-, LPS- and chemotherapeutics-induced necroptosis and its potential implications in RIPK1-targeted therapies.
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Affiliation(s)
- Chanchal Chauhan
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, 30625, Germany
| | - Andreas Kraemer
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences (BMLS), Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
- Frankfurt Cancer Institute (FCI) and German Translational Cancer Network (DKTK) site Frankfurt-Mainz, 60438, Frankfurt am Main, Germany
| | - Stefan Knapp
- Institute of Pharmaceutical Chemistry, Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences (BMLS), Goethe University Frankfurt am Main, 60438, Frankfurt am Main, Germany
- Frankfurt Cancer Institute (FCI) and German Translational Cancer Network (DKTK) site Frankfurt-Mainz, 60438, Frankfurt am Main, Germany
| | - Mark Windheim
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, 30625, Germany
| | - Alexey Kotlyarov
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, 30625, Germany
| | - Manoj B Menon
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, 110016, India.
| | - Matthias Gaestel
- Institute of Cell Biochemistry, Hannover Medical School, Hannover, 30625, Germany.
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Liu Y, Yang H, Fang Y, Xing Y, Pang X, Li Y, Zhang Y, Liu Y. Function and inhibition of Haspin kinase: targeting multiple cancer therapies by antimitosis. J Pharm Pharmacol 2022; 75:445-465. [PMID: 36334086 DOI: 10.1093/jpp/rgac080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
Abstract
Objectives
Haploid germ cell-specific nuclear protein kinase (Haspin) is a serine/threonine kinase as an atypical kinase, which is structurally distinct from conventional protein kinases.
Key findings
Functionally, Haspin is involved in important cell cycle progression, particularly in critical mitosis regulating centromeric sister chromatid cohesion during prophase and prometaphase, and subsequently ensuring proper chromosome alignment during metaphase and the normal chromosome segregation during anaphase. However, increasing evidence has demonstrated that Haspin is significantly upregulated in a variety of cancer cells in addition to normal proliferating somatic cells. Its knockdown or small molecule inhibition could prevent cancer cell growth and induce apoptosis by disrupting the regular mitotic progression. Given the specificity of its expressed tissues or cells and the uniqueness of its current known substrate, Haspin can be a promising target against cancer. Consequently, selective synthetic and natural inhibitors of Haspin have been widely developed to determine their inhibitory power for various cancer cells in vivo and in vitro.
Summary
Here our perspective includes a comprehensive review of the roles and structure of Haspin, its relatively potent and selective inhibitors and Haspin’s preliminary studies in a variety of cancers.
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Affiliation(s)
- Yongjian Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Hongliu Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yongsheng Fang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yantao Xing
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Xinxin Pang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yang Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yuanyuan Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
| | - Yonggang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine , Beijing , China
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7
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Distinct roles of haspin in stem cell division and male gametogenesis. Sci Rep 2021; 11:19901. [PMID: 34615946 PMCID: PMC8494884 DOI: 10.1038/s41598-021-99307-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/17/2021] [Indexed: 02/05/2023] Open
Abstract
The kinase haspin phosphorylates histone H3 at threonine-3 (H3T3ph) during mitosis. H3T3ph provides a docking site for the Chromosomal Passenger Complex at the centromere, enabling correction of erratic microtubule-chromosome contacts. Although this mechanism is operational in all dividing cells, haspin-null mice do not exhibit developmental anomalies, apart from aberrant testis architecture. Investigating this problem, we show here that mouse embryonic stem cells that lack or overexpress haspin, albeit prone to chromosome misalignment during metaphase, can still divide, expand and differentiate. RNA sequencing reveals that haspin dosage affects severely the expression levels of several genes that are involved in male gametogenesis. Consistent with a role in testis-specific expression, H3T3ph is detected not only in mitotic spermatogonia and meiotic spermatocytes, but also in non-dividing cells, such as haploid spermatids. Similarly to somatic cells, the mark is erased in the end of meiotic divisions, but re-installed during spermatid maturation, subsequent to methylation of histone H3 at lysine-4 (H3K4me3) and arginine-8 (H3R8me2). These serial modifications are particularly enriched in chromatin domains containing histone H3 trimethylated at lysine-27 (H3K27me3), but devoid of histone H3 trimethylated at lysine-9 (H3K9me3). The unique spatio-temporal pattern of histone H3 modifications implicates haspin in the epigenetic control of spermiogenesis.
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Nishida-Fukuda H, Tokuhiro K, Ando Y, Matsushita H, Wada M, Tanaka H. Evaluation of the antiproliferative effects of the HASPIN inhibitor CHR-6494 in breast cancer cell lines. PLoS One 2021; 16:e0249912. [PMID: 33852630 PMCID: PMC8046223 DOI: 10.1371/journal.pone.0249912] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 03/26/2021] [Indexed: 12/22/2022] Open
Abstract
HASPIN is a serine/threonine kinase that regulates mitosis by phosphorylating histone H3 at threonine 3. The expression levels of HASPIN in various cancers are associated with tumor malignancy and poor survival, suggesting that HASPIN inhibition may suppress cancer growth. As HASPIN mRNA levels are elevated in human breast cancer tissues compared with adjacent normal tissues, we examined the growth-suppressive effects of CHR-6494, a potent HASPIN inhibitor, in breast cancer cell lines in vitro and in vivo. We found that HASPIN was expressed in breast cancer cells of all molecular subtypes, as well as in immortalized mammary epithelial cells. HASPIN expression levels appeared to be correlated with the cell growth rate but not the molecular subtype of breast cancer. CHR-6494 exhibited potent antiproliferative effects against breast cancer cell lines and immortalized mammary epithelial cells in vitro, but failed to inhibit the growth of MDA-MB-231 xenografted tumors under conditions that have significant effects in a colorectal cancer model. These results imply that CHR-6494 does have antiproliferative effects in some situations, and further drug screening efforts are anticipated to identify more potent and selective HASPIN inhibition for use as an anticancer agent in breast cancer patients.
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Affiliation(s)
- Hisayo Nishida-Fukuda
- Department of Genome Editing, Institute of Biomedical Science, Kansai Medical University, Hirakata City, Osaka, Japan
- * E-mail: (HT); (HNF)
| | - Keizo Tokuhiro
- Department of Genome Editing, Institute of Biomedical Science, Kansai Medical University, Hirakata City, Osaka, Japan
| | - Yukio Ando
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki, Japan
| | - Hiroaki Matsushita
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki, Japan
| | - Morimasa Wada
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki, Japan
| | - Hiromitsu Tanaka
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo, Nagasaki, Japan
- * E-mail: (HT); (HNF)
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Liu Y, Wang C, Su H, Birchler JA, Han F. Phosphorylation of histone H3 by Haspin regulates chromosome alignment and segregation during mitosis in maize. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1046-1058. [PMID: 33130883 DOI: 10.1093/jxb/eraa506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
In human cells, Haspin-mediated histone H3 threonine 3 (H3T3) phosphorylation promotes centromeric localization of the chromosomal passenger complex, thereby ensuring proper kinetochore-microtubule attachment. Haspin also binds to PDS5 cohesin-associated factor B (Pds5B), antagonizing the Wings apart-like protein homolog (Wapl)-Pds5B interaction and thus preventing Wapl from releasing centromeric cohesion during mitosis. However, the role of Haspin in plant chromosome segregation is not well understood. Here, we show that in maize (Zea mays) mitotic cells, ZmHaspin localized to the centromere during metaphase and anaphase, whereas it localized to the telomeres during meiosis. These results suggest that ZmHaspin plays different roles during mitosis and meiosis. Knockout of ZmHaspin led to decreased H3T3 phosphorylation and histone H3 serine 10 phosphorylation, and defects in chromosome alignment and segregation in mitosis. These lines of evidence suggest that Haspin regulates chromosome segregation in plants via the mechanism described for humans, namely, H3T3 phosphorylation. Plant Haspin proteins lack the RTYGA and PxVxL motifs needed to bind Pds5B and heterochromatin protein 1, and no obvious cohesion defects were detected in ZmHaspin knockout plants. Taken together, these results highlight the conserved but slightly different roles of Haspin proteins in cell division in plants and in animals.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chunhui Wang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Handong Su
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - James A Birchler
- Division of Biological Sciences, University of Missouri, Columbia, MO, USA
| | - Fangpu Han
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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Feizbakhsh O, Pontheaux F, Glippa V, Morales J, Ruchaud S, Cormier P, Roch F. A Peak of H3T3 Phosphorylation Occurs in Synchrony with Mitosis in Sea Urchin Early Embryos. Cells 2020; 9:cells9040898. [PMID: 32272587 PMCID: PMC7226724 DOI: 10.3390/cells9040898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/28/2020] [Accepted: 04/02/2020] [Indexed: 12/31/2022] Open
Abstract
The sea urchin embryo provides a valuable system to analyse the molecular mechanisms orchestrating cell cycle progression and mitosis in a developmental context. However, although it is known that the regulation of histone activity by post-translational modification plays an important role during cell division, the dynamics and the impact of these modifications have not been characterised in detail in a developing embryo. Using different immuno-detection techniques, we show that the levels of Histone 3 phosphorylation at Threonine 3 oscillate in synchrony with mitosis in Sphaerechinus granularis early embryos. We present, in addition, the results of a pharmacological study aimed at analysing the role of this key histone post-translational modification during sea urchin early development.
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