19 results on '"He, Licai"'
Search Results
2. Antitumor effect of a novel humanized MUC1 antibody-drug conjugate on triple-negative breast cancer
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Li, Lan, Cao, Jiawei, Chen, Chunyan, Qin, Yaqian, He, Licai, Gu, Haihua, and Wu, Guang
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- 2023
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3. Therapeutic effect of a MUC1-specific monoclonal antibody-drug conjugates against pancreatic cancer model
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Wu, Guang, Li, Lan, Liu, Mengnan, Chen, Chunyan, Wang, Guangze, Jiang, Zewei, Qin, Yaqian, He, Licai, Li, Hongzhi, Cao, Jiawei, and Gu, Haihua
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- 2022
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4. KCTD5 regulates Ikaros degradation induced by chemotherapeutic drug etoposide in hematological cells.
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Ma, Lan, Yin, Changqing, Zhang, Yi, Li, Jie, Shi, Liuzhi, Zhou, Tong, Huang, Xixi, Liu, Yaqi, Cao, Jiawei, Wu, Guang, Gu, Haihua, and He, Licai
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ETOPOSIDE ,PROTEOLYSIS ,CELL differentiation ,IMMUNOPRECIPITATION ,MYELOID cells ,PROTEIN-protein interactions - Abstract
Therapy-related leukemia carries a poor prognosis, and leukemia after chemotherapy is a growing risk in clinic, whose mechanism is still not well understood. Ikaros transcription factor is an important regulator in hematopoietic cells development and differentiation. In the absence of Ikaros, lymphoid cell differentiation is blocked at an extremely early stage, and myeloid cell differentiation is also significantly affected. In this work, we showed that chemotherapeutic drug etoposide reduced the protein levels of several isoforms of Ikaros including IK1, IK2 and IK4, but not IK6 or IK7, by accelerating protein degradation, in leukemic cells. To investigate the molecular mechanism of Ikaros degradation induced by etoposide, immunoprecipitation coupled with LC-MS/MS analysis was conducted to identify changes in protein interaction with Ikaros before and after etoposide treatment, which uncovered KCTD5 protein. Our further study demonstrates that KCTD5 is the key stabilizing factor of Ikaros and chemotherapeutic drug etoposide induces Ikaros protein degradation through decreasing the interaction of Ikaros with KCTD5. These results suggest that etoposide may induce leukemic transformation by downregulating Ikaros via KCTD5, and our work may provide insights to attenuate the negative impact of chemotherapy on hematopoiesis. [ABSTRACT FROM AUTHOR]
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- 2024
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5. PRRG4 promotes breast cancer metastasis through the recruitment of NEDD4 and downregulation of Robo1
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Zhang, Lingling, Qin, Yaqian, Wu, Guang, Wang, Jieyi, Cao, Jiawei, Wang, Yaqi, Wu, Du, Yang, Kaiyan, Zhao, Zhiguang, He, Licai, Lyu, Jianxin, Li, Hongzhi, and Gu, Haihua
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- 2020
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6. LILRB4 ITIMs mediate the T cell suppression and infiltration of acute myeloid leukemia cells
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Li, Zunling, Deng, Mi, Huang, Fangfang, Jin, Changzhu, Sun, Shuang, Chen, Heyu, Liu, Xiaoye, He, Licai, Sadek, Ali H., and Zhang, Cheng Cheng
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- 2020
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7. USP35, regulated by estrogen and AKT, promotes breast tumorigenesis by stabilizing and enhancing transcriptional activity of estrogen receptor α
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Cao, Jiawei, Wu, Du, Wu, Guang, Wang, Yaqi, Ren, Tianhao, Wang, Yang, Lv, Yingshuai, Sun, Wei, Wang, Jieyi, Qian, Changrui, He, Licai, Yang, Kaiyan, Li, Hongzhi, and Gu, Haihua
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- 2021
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8. LILRB4 signalling in leukaemia cells mediates T cell suppression and tumour infiltration
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Deng, Mi, Gui, Xun, Kim, Jaehyup, Xie, Li, Chen, Weina, Li, Zunling, and He, Licai
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Acute myelocytic leukemia -- Genetic aspects -- Care and treatment -- Models -- Research ,Cell receptors -- Research ,Cellular signal transduction -- Research ,Immunotherapy -- Usage -- Research ,T cells -- Research ,Leukemia ,Cancer treatment ,Apolipoproteins ,Cancer ,Tumors ,Phenols (Class of compounds) ,Retirement benefits ,Antibodies ,Cells (Biology) ,Tyrosine ,Medical schools ,Environmental issues ,Science and technology ,Zoology and wildlife conservation - Abstract
Immune checkpoint blockade therapy has been successful in treating some types of cancer but has not shown clinical benefits for treating leukaemia.sup.1. This result suggests that leukaemia uses unique mechanisms to evade this therapy. Certain immune inhibitory receptors that are expressed by normal immune cells are also present on leukaemia cells. Whether these receptors can initiate immune-related primary signalling in tumour cells remains unknown. Here we use mouse models and human cells to show that LILRB4, an immunoreceptor tyrosine-based inhibition motif-containing receptor and a marker of monocytic leukaemia, supports tumour cell infiltration into tissues and suppresses T cell activity via a signalling pathway that involves APOE, LILRB4, SHP-2, uPAR and ARG1 in acute myeloid leukaemia (AML) cells. Deletion of LILRB4 or the use of antibodies to block LILRB4 signalling impeded AML development. Thus, LILRB4 orchestrates tumour invasion pathways in monocytic leukaemia cells by creating an immunosuppressive microenvironment. LILRB4 represents a compelling target for the treatment of monocytic AML.The receptor LILRB4 on monocytic leukaemia cells suppresses T cell activity and support the infiltration of tumour cells into tissues., Author(s): Mi Deng [sup.1] , Xun Gui [sup.2] , Jaehyup Kim [sup.3] , Li Xie [sup.4] , Weina Chen [sup.3] , Zunling Li [sup.1] [sup.5] , Licai He [sup.1] [sup.6] [...]
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- 2018
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9. Gab2 promotes acute myeloid leukemia growth and migration through the SHP2‐Erk‐CREB signaling pathway.
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Gong, Rui, Li, Haoying, Liu, Yaqi, Wang, Yanyan, Ge, Lu, Shi, Liuzhi, Wu, Guang, Lyu, Jianxin, Gu, Haihua, and He, Licai
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ACUTE myeloid leukemia ,CELLULAR signal transduction ,BLOOD diseases ,CELL migration ,OLDER people - Abstract
Acute myeloid leukemia (AML) is a hematologic malignant disease largely affecting older adults with poor outcomes. Lack of effective targeted treatment is a major challenge in managing the disease in the clinic. Scaffolding adaptor Gab2 is amplified in a subset of AML. However, the causative role of Gab2 in AML remains to be explored. In this study, it was found that Gab2 was expressed at high levels in AML patient samples and AML cell lines. Experiments by knocking down Gab2 expression using shRNA showed that Gab2 promoted AML cell growth and migration in vitro and in vivo. Further studies using Gab2 mutants and pharmacological inhibitors revealed that Gab2 increased CREB phosphorylation via the SHP‐2/Erk signaling pathway. CREB phosphorylation contributed to Gab2‐induced cell migration by increasing MMP2 and MMP9 expression. This research indicates that high Gab2 expression promotes AML progression through the SHP2‐Erk‐CREB signaling pathway. CREB suppression may help treat AML with high Gab2 expression. [ABSTRACT FROM AUTHOR]
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- 2022
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10. Evidence for ABL Amplification in Multiple Myeloma and Therapeutic Implications.
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Huang, He, Zhou, Shuping, Lin, Hongdou, Guo, Wenjian, Lin, Ying, Yao, Ronxin, He, Licai, Yu, Kang, and Li, Qian
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MULTIPLE myeloma ,GENE amplification ,FLUORESCENCE in situ hybridization ,GASTROINTESTINAL stromal tumors ,CELL lines ,OVERALL survival - Abstract
Background. Cytogenetic abnormalities are considered initiating events in the pathogenesis of multiple myeloma (MM) and are assumed to be of clinical significance. Methods. Fluorescence in situ hybridization (FISH) was used to analyze chromosomal architecture in 101 patients with MM. We evaluated overall patient survival and assessed the cytotoxicity of imatinib against MM cells using a CCK8 assay. Results. ABL gene amplification was detected in 67 patients (66.3%). However, ABL gene amplification was not associated with clinical features, cytogenetic abnormalities (c-Myc amplification, IGH rearrangement, RB1 deletion, p53 deletion, or 1q21 amplification), or overall survival. ABL amplification in MM cell lines (LP-1 and U266) was revealed by FISH. Furthermore, the ABL protein was easily detectable in MM cell lines and some tumor cells by western blotting. A CCK8 assay indicated limited cytotoxicity of imatinib against MM cells. Conclusions. Our study firstly discussed ABL gene amplification was prevalent in MM cells, and we believe that the ABL gene would potentially be a useful target in the treatment of combination strategy for MM with ABL amplification in the future. [ABSTRACT FROM AUTHOR]
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- 2022
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11. novel humanized MUC1 antibody–drug conjugate for the treatment of trastuzumab-resistant breast cancer.
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Wu, Guang, Li, Lan, Qiu, Yuxin, Sun, Wei, Ren, Tianhao, Lv, Yingshuai, Liu, Mengnan, Wang, Xiaoxia, Tao, Hongqun, Zhao, Lingjie, Cao, Jiawei, He, Licai, Li, Hongzhi, and Gu, Haihua
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- 2021
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12. 24‐Dehydrocholesterol reductase promotes the growth of breast cancer stem‐like cells through the Hedgehog pathway.
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Qiu, Ting, Cao, Jiawei, Chen, Wanzhou, Wang, Jieyi, Wang, Yaqi, Zhao, Lingjie, Liu, Min, He, Licai, Wu, Guang, Li, Hongzhi, and Gu, Haihua
- Abstract
Cholesterol is a risk factor for breast cancer. However, it is still unclear whether the cholesterol biosynthesis pathway plays any significant role in breast carcinogenesis. 24‐Dehydrocholesterol reductase (DHCR24) is a key enzyme in the cholesterol synthesis pathway. Although DHCR24 is reported to have different functions in different cancers, it is not clear whether DHCR24 is involved in breast cancer. In this study, we found that DHCR24 expression was higher in breast cancer especially in luminal and HER2 positive breast cancer tissues compared with normal breast. Changes in DHCR24 expression altered cellular cholesterol content without affecting the adherent growth of breast cancer cells. However, DHCR24 knockdown reduced whereas DHCR24 overexpression enhanced breast cancer stem‐like cell populations such as mammosphere and aldehyde dehydrogenase positive cell numbers. In addition, DHCR24 overexpression increased the expression of the Hedgehog pathway‐regulated genes. Treating DHCR24 overexpressing breast cancer cell lines with the Hedgehog pathway inhibitor GANT61 blocked DHCR24‐induced mammosphere growth and increased mRNA levels of the Hedgehog regulated genes. Furthermore, expression of a constitutively activated mutant of Smoothened, a key hedgehog signal transducer, rescued the decreases in mammosphere growth and Hedgehog regulated gene expression induced by knockdown of DHCR24. These results indicate that DHCR24 promotes the growth of breast cancer stem‐like cells in part through enhancing the Hedgehog signaling pathway. Our data suggest that cholesterol contribute to breast carcinogenesis by enhancing Hedgehog signaling and cancer stem‐like cell populations. Enzymes including DHCR24 involved in cholesterol biosynthesis should be considered as potential treatment targets for breast cancer. [ABSTRACT FROM AUTHOR]
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- 2020
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13. Primaquine phosphate induces the apoptosis of ATRA‐resistant acute promyelocytic leukemia cells by inhibition of the NF‐κB pathway.
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Ma, Lan, Chen, Lianjuan, Li, Haoying, Ge, Lu, Wang, Siheng, Zhang, Zhida, Huang, He, Shi, Liuzhi, Li, Tong, Gu, Haihua, Lyu, Jianxin, and He, Licai
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ACUTE promyelocytic leukemia ,PRIMAQUINE ,CHROMOSOMAL translocation ,ACUTE myeloid leukemia ,ARSENIC trioxide ,APOPTOSIS ,TUMOR growth - Abstract
As a subtype of acute myeloid leukemia (AML), acute promyelocytic leukemia (APL) is characterized by a chromosomal translocation, most of which result in the production of a PML‐RAR alpha fusion protein. Although the overall survival rate of APL patients has improved dramatically due to all‐trans retinoic acid (ATRA) treatment, ATRA‐resistance remains a clinical challenge in the management of APL. Therefore, alternative agents should be considered for ATRA‐resistant APL patients. Here, we report that antimalaria drug primaquine phosphate (PRQ) exhibits an anti‐leukemia effect on both ATRA‐sensitive cell line NB4 and ATRA‐resistant APL cell lines, NB4‐LR2, NB4‐LR1, and NB4‐MR2. Moreover, PRQ significantly inhibited primary colony formation of untreated or relapsed APL patients. Further study showed that PRQ could induce the apoptosis of APL cells by inhibiting NF‐κB signaling pathway. The in vivo study showed that PRQ significantly inhibited NB4‐LR2 xenograft tumors growth. These results suggest that PRQ is a potential therapeutic agent for ATRA‐resistant APL patients. [ABSTRACT FROM AUTHOR]
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- 2020
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14. Mebendazole exhibits potent anti-leukemia activity on acute myeloid leukemia.
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He, Licai, Shi, Liuzhi, Du, Zhuanyun, Huang, He, Gong, Rui, Ma, Lan, Chen, Lianjuan, Gao, Shenmeng, Lyu, Jianxin, and Gu, Haihua
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ACUTE myeloid leukemia , *MEBENDAZOLE , *ANTHRACYCLINES , *CYTARABINE , *ENDOTHELIAL cells - Abstract
Acute myeloid leukemia (AML) is one of the most common types of acute leukemia in adults with the lowest survival rate of all leukemia. Resistance to cytarabine and anthracycline-based chemotherapy is a major cause of treatment failure. Thus, finding new drugs with anti-leukemia activities and minimal side effect is urgently needed. Here through screening more than 1000 drugs approved by the Food and Drug Administration (FDA) of United States, the anthelmintic drug mebendazole (MBZ) was found to inhibit the growth of AML cell lines (THP-1, U937, NB4 and K562) and bone marrow mononuclear cells (BM-MNCs) from AML patients at pharmacologically achievable concentrations. In contrast, similar concentration of MBZ had little inhibitory effect on the growth of normal peripheral blood mononuclear cells (PBMC) or human umbilical vein endothelial cells (HUVEC). In addition, MBZ induced mitotic arrest and mitotic catastrophe in AML cells based on nuclear morphology, cell cycle distribution, mitotic marker analyses and the number of multinucleated cells and apoptotic cells. Furthermore, MBZ treatment inhibited activation of Akt and Erk in AML leukemic cells. Finally, MBZ repressed the progression of leukemic cells in vivo and prolonged survival in AML xenograft mouse model. Taken together, our results suggest that MBZ could be a potential new therapeutic agent for the treatment of AML patients. [ABSTRACT FROM AUTHOR]
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- 2018
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15. Mammary tumor growth and metastasis are reduced in c-Kit mutant Sash mice.
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He, Licai, Zhu, Zhenfeng, Chen, Shang, Wang, Yongping, and Gu, Haihua
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MAMMARY gland tumors , *METASTASIS , *TUMOR growth , *PROTEIN-tyrosine kinases , *PROTO-oncogenes , *MAST cells , *LABORATORY mice - Abstract
Besides its well-known function in allergic response, mast cell, one of the key immune cells present in tumor microenvironment, plays important roles in cancer progression. However, the functional role of mast cells in breast cancer development and metastasis is not well understood. To test the involvement of mast cells in breast cancer, we examined the effects of loss of mast cells on mammary tumor development by crossing the well-known mast cell deficient mouse strain sash (KitW-sh/W-sh) with the mammary tumor transgenic mouse strain MMTV-Polyoma Middle T antigen (Py MT). Although mammary tumor onset was not affected in the absence of mast cells, mammary growth and metastasis were reduced in Py MT/KitW-sh/W-sh mice compared with Py MT/wild-type mice ( WT). Histological and immunofluorescent analyses showed that tumors from Py MT/KitW-sh/W-sh mice showed largely differentiated morphology with reduced angiogenesis compared with MMTV-Py MT/ WT mice. Our results suggest that mast cells may promote breast cancer growth and metastasis. Agents that can block mast cells growth are potential new therapies to treat metastatic breast cancer. [ABSTRACT FROM AUTHOR]
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- 2016
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16. Construction of retrovirus vector of IK4 gene mutation and its expression in leukemic cells.
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SHI Liuzhi, ZHENG Qianqian, and HE Licai
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IK4 is an isoform of IKAROS gene which plays a key role in the hematopoiesis, in this work, the construction of retro-virus vector of IK4 mutation and its expression in leukemic cells was investigated. PCR site-directed mutagenesis method based on overlap extension was used to construct four IK4 gene mutants of single- or multi-site mutations, which were then cloned into the retrovirus vector Pmscv-puro to form recombinant expression vector. The point mutations were verified by DNA sequencing. The recombinant expression vectors were co-transfected with packaging plasmids VSVG and Gag-Pol into 293T cells to produce retroviruses. Supernatants containing retroviruses were collected and were used to infect NB4 cells. Puromycin was used to select stable cell lines. The expression of mutants was verified by Western blotting analysis. Four IK4 gene mutants of single- or multi-site mutations were successfully constructed by overlap extension PCR, and the mutants were expressed in leukemic cells, which will provide basis for subsequent function and mechanism research. [ABSTRACT FROM AUTHOR]
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- 2016
17. A novel miR-375-HOXB3-CDCA3/DNMT3B regulatory circuitry contributes to leukemogenesis in acute myeloid leukemia.
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Bi, Laixi, Zhou, Bin, Li, Haiying, He, Licai, Wang, Chunjing, Wang, Zhonggai, Zhu, Liqing, Chen, Mengqian, and Gao, Shenmeng
- Abstract
Background: Acute myeloid leukemia (AML) is a heterogeneous group of hematopoietic malignancies due to sophisticated genetic mutations and epigenetic dysregulation. MicroRNAs (miRNAs), a class of small non-coding RNAs, are important regulators of gene expression in all biological processes, including leukemogenesis. Recently, miR-375 has been reported to be a suppressive miRNA in multiple types of cancers, but its underlying anti-leukemia activity in AML is largely unknown.Methods: Quantitative reverse transcriptase PCR (qRT-PCR) was used to measure the expression of miR-375 and HOXB3 in leukemic cells and normal controls. Targets of miR-375 were confirmed by western blot and luciferase assay. Phenotypic effects of miR-375 overexpression and HOXB3 knockdown were assessed using viability (trypan blue exclusion assay), colony formation/replating, as well as tumor xenograft assays in vivo.Results: The expression of miR-375 was substantially decreased in leukemic cell lines and primary AML blasts compared with normal controls, because DNA hypermethylation of precursor-miR-375 (pre-miR-375) promoter was discovered in leukemic cells but not in normal controls. Lower expression of miR-375 predicted poor outcome in AML patients. Furthermore, forced expression of miR-375 not only decreased proliferation and colony formation in leukemic cells but also reduced xenograft tumor size and prolonged the survival time in a leukemia xenograft mouse model. Mechanistically, overexpression of miR-375 reduced HOXB3 expression and repressed the activity of a luciferase reporter through binding 3'-untranslated regions (3'-UTR) of HOXB3 mRNA. Overexpression of HOXB3 partially blocked miR-375-induced arrest of proliferation and reduction of colony number, suggesting that HOXB3 plays an important role in miR-375-induced anti-leukemia activity. Knockdown of HOXB3 by short hairpin RNAs reduced the expression of cell division cycle associated 3 (CDCA3), which decreased cell proliferation. Furthermore, HOXB3 induced DNA methyltransferase 3B (DNMT3B) expression to bind in the pre-miR-375 promoter and enhanced DNA hypermethylation of pre-miR-375, leading to the lower expression of miR-375.Conclusions: Collectively, we have identified a miR-375-HOXB3-CDCA3/DNMT3B regulatory circuitry which contributes to leukemogenesis and suggests a therapeutic strategy of restoring miR-375 expression in AML. [ABSTRACT FROM AUTHOR]- Published
- 2018
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18. Shp1 positively regulates EGFR signaling by controlling EGFR protein expression in mammary epithelial cells.
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Yuan, Taichang, Ma, Hua, Du, Zhuanyun, Xiong, Xusheng, Gao, Hongwei, Fang, Zenghui, He, Licai, Li, Hongzhi, and Gu, Haihua
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EPIDERMAL growth factor receptors , *PROTEIN expression , *EPITHELIAL cells , *PROTEIN-tyrosine phosphatase , *PHOSPHORYLATION - Abstract
SH2-domain containing protein tyrosine phosphatase 1 (Shp1/PTPN6) is mainly expressed in hematopoietic cells and acts a negative signaling regulator. Although Shp1 is also expressed in epithelial cells, the function of shp1 in normal epithelial is still less well understood, especially in regulating the growth of epithelial cells. In this study, different shRNAs and siRNAs against Shp1 were used to knockdown Shp1 expression in MCF10A, an immortalized mammary epithelial cell line. Shp1 knockdown resulted in inhibited cell growth in part due to lower percentage of MCF10A cells entering into S phase and reduced cyclin D1 expression. Accordingly, EGF-induced tyrosyl phosphorylation of EGFR and Stat5 was significantly inhibited in cells with Shp1 knockdown compared with control whereas EGF-induced Akt and Erk phosphorylation was not affected by Shp1 knockdown. Further analysis revealed that Shp1 knockdown lead to decreased EGFR protein expression without affecting EGFR mRNA expression or increasing EGFR protein degradation. Our data indicate that Shp1 functions as a positive regulator and acts in a novel mechanism through promoting EGFR protein expression in mammary epithelial cells. [ABSTRACT FROM AUTHOR]
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- 2017
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19. Gab2 promotes cancer stem cell like properties and metastatic growth of ovarian cancer via downregulation of miR-200c.
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Fang, Zenghui, Li, Tong, Chen, Wanzhou, Wu, Du, Qin, Yaqian, Liu, Min, Wu, Guang, He, Licai, Li, Hongzhi, and Gu, Haihua
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CANCER stem cells , *OVARIAN cancer , *CELL migration inhibition , *TUMOR growth , *CANCER cell growth , *DOWNREGULATION - Abstract
Scaffolding adaptor Gab2 is overexpressed in a subset of high-grade ovarian cancer. Our published work shows that Gab2 via PI3K enhances migratory behaviors and epithelial to mesenchymal transition (EMT) features of ovarian cancer cells in vitro. However, it is still unclear how Gab2/PI3K pathway reuglates EMT characteristics and whether Gab2 promotes the growth of ovarian cancer stem cell (CSC)-like population and metastatic growth. In this study, we examined the effects of Gab2 expression on CSC-like cell growth using Aldefluor and tumorshpere assays commonly used for assessing ovarian cancer cells with CSC properties. Gab2 overexpression increased the number of ALDH+ cells and tumorsphere formation in two different ovarian cancer cell lines OVCAR5 and OVCAR8, whereas knockdown of Gab2 decreased the number of ALDH+ cells and tumorsphere formation in Caov-3 cells. Furthermore, Gab2 promoted metastatic tumor growth of OVCAR5 in nude mice. Mechanistically, we uncovered that Gab2 via PI3K specifically inhibited miR-200c expression. miR-200c downregulation contributed to the Gab2-enhanced cell migratory behaviors, EMT properties, and the expansion of ALDH+ cells and tumorspheres. Furthermore, Gab2 promoted CD44 expression and cell migration/invasion through miR-200c downregulation. Our findings support a model that Gab2-PI3K pathway via miR-200c downregulation promotes CD44 expression, EMT characteristics, and CSC-like cell growth. Therapies involving miR-200c or targeting CD44 should help treat ovarian cancer with high Gab2 expression. • Gab2 promotes the growth of CSC-like population of ovarian cancer cells. • Gab2 promotes metastatic growth of ovarian cancer cells in xenograft. • Gab2 via PI3K inhibits miR-200c expression in ovarian cancer cells. • Gab2 via miR-200c downregulation promotes phenotypes of EMT and CSC. • Gab2 inhibition of miR-200c enhances CD44 expression and cell migration/invasion. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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