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Chen H, Bai Y, Kobayashi M, Xiao S, Cai W, Barajas S, Chen S, Miao J, Meke FN, Vemula S, Ropa JP, Croop JM, Boswell HS, Wan J, Jia Y, Liu H, Li LS, Altman JK, Eklund EA, Ji P, Tong W, Band H, Huang DT, Platanias LC, Zhang ZY, Liu Y. PRL2 phosphatase enhances oncogenic FLT3 signaling via dephosphorylation of the E3 ubiquitin ligase CBL at tyrosine 371. Blood 2023; 141:244-259. [PMID: 36206490 PMCID: PMC9936309 DOI: 10.1182/blood.2022016580] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 09/06/2022] [Accepted: 09/24/2022] [Indexed: 02/05/2023] Open
Abstract
Acute myeloid leukemia (AML) is an aggressive blood cancer with poor prognosis. FMS-like tyrosine kinase receptor-3 (FLT3) is one of the major oncogenic receptor tyrosine kinases aberrantly activated in AML. Although protein tyrosine phosphatase PRL2 is highly expressed in some subtypes of AML compared with normal human hematopoietic stem and progenitor cells, the mechanisms by which PRL2 promotes leukemogenesis are largely unknown. We discovered that genetic and pharmacological inhibition of PRL2 significantly reduce the burden of FLT3-internal tandem duplications-driven leukemia and extend the survival of leukemic mice. Furthermore, we found that PRL2 enhances oncogenic FLT3 signaling in leukemia cells, promoting their proliferation and survival. Mechanistically, PRL2 dephosphorylates the E3 ubiquitin ligase CBL at tyrosine 371 and attenuates CBL-mediated ubiquitination and degradation of FLT3, leading to enhanced FLT3 signaling in leukemia cells. Thus, our study reveals that PRL2 enhances oncogenic FLT3 signaling in leukemia cells through dephosphorylation of CBL and will likely establish PRL2 as a novel druggable target for AML.
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Affiliation(s)
- Hongxia Chen
- Department of Hematology and Oncology, Chongqing University Three Gorges Hospital, Chongqing, China
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- School of Medicine, Chongqing University, Chongqing, China
| | - Yunpeng Bai
- Department of Medicinal Chemistry and Molecular Pharmacology, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN
| | - Michihiro Kobayashi
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Shiyu Xiao
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Wenjie Cai
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Sergio Barajas
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Sisi Chen
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Jinmin Miao
- Department of Medicinal Chemistry and Molecular Pharmacology, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN
| | - Frederick Nguele Meke
- Department of Medicinal Chemistry and Molecular Pharmacology, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - James P. Ropa
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN
| | - James M. Croop
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - H. Scott Boswell
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Jun Wan
- Department of Medical Genetics, Indiana University, Indianapolis, IN
| | - Yuzhi Jia
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Huiping Liu
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
| | - Loretta S. Li
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Jessica K. Altman
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
| | - Elizabeth A. Eklund
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
- Department of Medicine, Jesse Brown VA Medical Center, Chicago, IL
| | - Peng Ji
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Wei Tong
- Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA
| | - Hamid Band
- Department of Genetics, University of Nebraska Medical Center, Omaha, NB
| | - Danny T. Huang
- Cancer Research UK Beatson Institute and Institute of Cancer Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Leonidas C. Platanias
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
- Department of Medicine, Jesse Brown VA Medical Center, Chicago, IL
| | - Zhong-Yin Zhang
- Department of Medicinal Chemistry and Molecular Pharmacology, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN
| | - Yan Liu
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL
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2
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Patterson AM, Vemula S, Plett PA, Sampson CH, Chua HL, Fisher A, Wu T, Sellamuthu R, Feng H, Katz BP, DesRosiers CM, Pelus LM, Cox GN, MacVittie TJ, Orschell CM. Age and Sex Divergence in Hematopoietic Radiosensitivity in Aged Mouse Models of the Hematopoietic Acute Radiation Syndrome. Radiat Res 2022; 198:221-242. [PMID: 35834823 PMCID: PMC9512046 DOI: 10.1667/rade-22-00071.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 06/11/2022] [Indexed: 11/03/2022]
Abstract
The hematopoietic system is highly sensitive to stress from both aging and radiation exposure, and the hematopoietic acute radiation syndrome (H-ARS) should be modeled in the geriatric context separately from young for development of age-appropriate medical countermeasures (MCMs). Here we developed aging murine H-ARS models, defining radiation dose response relationships (DRRs) in 12-month-old middle-aged and 24-month-old geriatric male and female C57BL/6J mice, and characterized diverse factors affecting geriatric MCM testing. Groups of approximately 20 mice were exposed to ∼10 different doses of radiation to establish radiation DRRs for estimation of the LD50/30. Radioresistance increased with age and diverged dramatically between sexes. The LD50/30 in young adult mice averaged 853 cGy and was similar between sexes, but increased in middle age to 1,005 cGy in males and 920 cGy in females, with further sex divergence in geriatric mice to 1,008 cGy in males but 842 cGy in females. Correspondingly, neutrophils, platelets, and functional hematopoietic progenitor cells were all increased with age and rebounded faster after irradiation. These effects were higher in aged males, and neutrophil dysfunction was observed in aged females. Upstream of blood production, hematopoietic stem cell (HSC) markers associated with age and myeloid bias (CD61 and CD150) were higher in geriatric males vs. females, and sex-divergent gene signatures were found in HSCs relating to cholesterol metabolism, interferon signaling, and GIMAP family members. Fluid intake per gram body weight decreased with age in males, and decreased after irradiation in all mice. Geriatric mice of substrain C57BL/6JN sourced from the National Institute on Aging were significantly more radiosensitive than C57BL/6J mice from Jackson Labs aged at our institution, indicating mouse source and substrain should be considered in geriatric radiation studies. This work highlights the importance of sex, vendor, and other considerations in studies relating to hematopoiesis and aging, identifies novel sex-specific functional and molecular changes in aging hematopoietic cells at steady state and after irradiation, and presents well-characterized aging mouse models poised for MCM efficacy testing for treatment of acute radiation effects in the elderly.
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Affiliation(s)
- Andrea M. Patterson
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Sasidhar Vemula
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - P. Artur Plett
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Carol H. Sampson
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Hui Lin Chua
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Alexa Fisher
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Tong Wu
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Rajendran Sellamuthu
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Hailin Feng
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
| | - Barry P. Katz
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, Indiana
| | - Colleen M. DesRosiers
- Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Louis M. Pelus
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
- Department of Microbiology & Immunology, Indiana University School of Medicine, Indianapolis, Indiana
| | | | | | - Christie M. Orschell
- Department of Medicine Indiana University School of Medicine Indianapolis, Indiana
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3
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Yu H, Gao R, Chen S, Liu X, Wang Q, Cai W, Vemula S, Fahey AC, Henley D, Kobayashi M, Liu SZ, Qian Z, Kapur R, Broxmeyer HE, Gao Z, Xi R, Liu Y. Bmi1 Regulates Wnt Signaling in Hematopoietic Stem and Progenitor Cells. Stem Cell Rev Rep 2021; 17:2304-2313. [PMID: 34561772 PMCID: PMC9097559 DOI: 10.1007/s12015-021-10253-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2021] [Indexed: 11/26/2022]
Abstract
Polycomb group protein Bmi1 is essential for hematopoietic stem cell (HSC) self-renewal and terminal differentiation. However, its target genes in hematopoietic stem and progenitor cells are largely unknown. We performed gene expression profiling assays and found that genes of the Wnt signaling pathway are significantly elevated in Bmi1 null hematopoietic stem and progenitor cells (HSPCs). Bmi1 is associated with several genes of the Wnt signaling pathway in hematopoietic cells. Further, we found that Bmi1 represses Wnt gene expression in HSPCs. Importantly, loss of β-catenin, which reduces Wnt activation, partially rescues the HSC self-renewal and differentiation defects seen in the Bmi1 null mice. Thus, we have identified Bmi1 as a novel regulator of Wnt signaling pathway in HSPCs. Given that Wnt signaling pathway plays an important role in hematopoiesis, our studies suggest that modulating Wnt signaling may hold potential for enhancing HSC self-renewal, thereby improving the outcomes of HSC transplantation.
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Affiliation(s)
- Hao Yu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Rui Gao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Sisi Chen
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Xicheng Liu
- National Institute of Biological Science, Beijing, China
| | - Qiang Wang
- Department of Biochemistry and Molecular Biology, College of Medicine, Pennsylvania State University, Hershey, PA, 17033, USA
| | - Wenjie Cai
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Aidan C Fahey
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Danielle Henley
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Michihiro Kobayashi
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Stephen Z Liu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Zhijian Qian
- Department of Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Hal E Broxmeyer
- Department of Microbiology and Immunology, Indiana University, Indianapolis, IN, 46202, USA
| | - Zhonghua Gao
- Department of Biochemistry and Molecular Biology, College of Medicine, Pennsylvania State University, Hershey, PA, 17033, USA
| | - Rongwen Xi
- National Institute of Biological Science, Beijing, China.
| | - Yan Liu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA.
- Robert H. Lurie Comprehensive Cancer Center, Chicago, IL, 60611, USA.
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4
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Patterson AM, Sellamuthu R, Plett PA, Sampson CH, Chua HL, Fisher A, Vemula S, Feng H, Katz BP, Tudor G, Miller SJ, MacVittie TJ, Booth C, Orschell CM. Establishing Pediatric Mouse Models of the Hematopoietic Acute Radiation Syndrome and the Delayed Effects of Acute Radiation Exposure. Radiat Res 2021; 195:307-323. [PMID: 33577641 DOI: 10.1667/rade-20-00259.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 01/19/2021] [Indexed: 11/03/2022]
Abstract
Medical countermeasures (MCMs) for hematopoietic acute radiation syndrome (H-ARS) should be evaluated in well-characterized animal models, with consideration of at-risk populations such as pediatrics. We have developed pediatric mouse models of H-ARS and delayed effects of acute radiation exposure (DEARE) for efficacy testing of MCMs against radiation. Male and female C57BL/6J mice aged 3, 4, 5, 6, 7 and 8 weeks old (±1 day) were characterized for baseline hematopoietic and gastrointestinal parameters, radiation response, efficacy of a known MCM, and DEARE at six and 12 months after total-body irradiation (TBI). Weanlings (age 3 weeks) were the most radiosensitive age group with an estimated LD50/30 of 712 cGy, while mice aged 4 to 8 weeks were more radioresistant with an estimated LD50/30 of 767-787 cGy. Female weanlings were more radiosensitive than males at 3 and 4 weeks old but became significantly more radioresistant after the pubertal age of 5 weeks. The most dramatic increase in body weight, RBC counts and intestinal circumference length occurred from 3 to 5 weeks of age. The established radiomitigator Neulasta® (pegfilgrastim) significantly increased 30-day survival in all age groups, validating these models for MCM efficacy testing. Analyses of DEARE among pediatric survivors revealed depressed weight gain in males six months post-TBI, and increased blood urea nitrogen at 12 months post-TBI which was more severe in females. Hematopoietic DEARE at six months post-TBI appeared to be less severe in survivors from the 3- and 4-week-old groups but was equally severe in all age groups by 12 months of age. Similar to our other acute radiation mouse models, there was no appreciable effect of Neulasta used as an H-ARS MCM on the severity of DEARE. In summary, these data characterize a pediatric mouse model useful for assessing the efficacy of MCMs against ARS and DEARE in children.
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Affiliation(s)
- Andrea M Patterson
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Rajendran Sellamuthu
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - P Artur Plett
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Carol H Sampson
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Hui Lin Chua
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Alexa Fisher
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Sasidhar Vemula
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Hailin Feng
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Barry P Katz
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, Indiana
| | | | - Steven J Miller
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Thomas J MacVittie
- Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland
| | | | - Christie M Orschell
- Department of a Medicine, Indiana University School of Medicine, Indianapolis, Indiana
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5
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Chen S, Wang Q, Yu H, Capitano ML, Vemula S, Nabinger SC, Gao R, Yao C, Kobayashi M, Geng Z, Fahey A, Henley D, Liu SZ, Barajas S, Cai W, Wolf ER, Ramdas B, Cai Z, Gao H, Luo N, Sun Y, Wong TN, Link DC, Liu Y, Boswell HS, Mayo LD, Huang G, Kapur R, Yoder MC, Broxmeyer HE, Gao Z, Liu Y. Mutant p53 drives clonal hematopoiesis through modulating epigenetic pathway. Nat Commun 2019; 10:5649. [PMID: 31827082 PMCID: PMC6906427 DOI: 10.1038/s41467-019-13542-2] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 11/11/2019] [Indexed: 01/16/2023] Open
Abstract
Clonal hematopoiesis of indeterminate potential (CHIP) increases with age and is associated with increased risks of hematological malignancies. While TP53 mutations have been identified in CHIP, the molecular mechanisms by which mutant p53 promotes hematopoietic stem and progenitor cell (HSPC) expansion are largely unknown. Here we discover that mutant p53 confers a competitive advantage to HSPCs following transplantation and promotes HSPC expansion after radiation-induced stress. Mechanistically, mutant p53 interacts with EZH2 and enhances its association with the chromatin, thereby increasing the levels of H3K27me3 in genes regulating HSPC self-renewal and differentiation. Furthermore, genetic and pharmacological inhibition of EZH2 decreases the repopulating potential of p53 mutant HSPCs. Thus, we uncover an epigenetic mechanism by which mutant p53 drives clonal hematopoiesis. Our work will likely establish epigenetic regulator EZH2 as a novel therapeutic target for preventing CHIP progression and treating hematological malignancies with TP53 mutations.
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Affiliation(s)
- Sisi Chen
- Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis, IN, 46202, USA
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Qiang Wang
- Department of Biochemistry and Molecular Biology, the Cancer Institute, College of Medicine, Pennsylvania State University, Hershey, PA, 17033, USA
| | - Hao Yu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Maegan L Capitano
- Department of Microbiology and Immunology, Indiana University, Indianapolis, IN, 46202, USA
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Sarah C Nabinger
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Rui Gao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Chonghua Yao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
- Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Michihiro Kobayashi
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Zhuangzhuang Geng
- Department of Biochemistry and Molecular Biology, the Cancer Institute, College of Medicine, Pennsylvania State University, Hershey, PA, 17033, USA
| | - Aidan Fahey
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Danielle Henley
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Stephen Z Liu
- Department of Medical Genetics, Indiana University, Indianapolis, IN, 46202, USA
| | - Sergio Barajas
- Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis, IN, 46202, USA
| | - Wenjie Cai
- Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis, IN, 46202, USA
| | - Eric R Wolf
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Baskar Ramdas
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Zhigang Cai
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Hongyu Gao
- Department of Medical Genetics, Indiana University, Indianapolis, IN, 46202, USA
| | - Na Luo
- Department of Ophthalmology, Indiana University, Indianapolis, IN, 46202, USA
| | - Yang Sun
- Department of Ophthalmology, Indiana University, Indianapolis, IN, 46202, USA
| | - Terrence N Wong
- Siteman Cancer Center, Washington University, St. Louis, MO, 63110, USA
| | - Daniel C Link
- Siteman Cancer Center, Washington University, St. Louis, MO, 63110, USA
| | - Yunlong Liu
- Department of Medical Genetics, Indiana University, Indianapolis, IN, 46202, USA
| | - H Scott Boswell
- Department of Medicine, Indiana University, Indianapolis, IN, 46202, USA
| | - Lindsey D Mayo
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Gang Huang
- Division of Pathology and Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Mervin C Yoder
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA
| | - Hal E Broxmeyer
- Department of Microbiology and Immunology, Indiana University, Indianapolis, IN, 46202, USA
| | - Zhonghua Gao
- Department of Biochemistry and Molecular Biology, the Cancer Institute, College of Medicine, Pennsylvania State University, Hershey, PA, 17033, USA.
| | - Yan Liu
- Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis, IN, 46202, USA.
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, IN, 46202, USA.
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6
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Chua HL, Artur Plett P, Fisher A, Sampson CH, Vemula S, Feng H, Sellamuthu R, Wu T, MacVittie TJ, Orschell CM. Lifelong Residual bone Marrow Damage in Murine Survivors of the Hematopoietic Acute Radiation Syndrome (H-ARS): A Compilation of Studies Comprising the Indiana University Experience. Health Phys 2019; 116:546-557. [PMID: 30789496 PMCID: PMC6388630 DOI: 10.1097/hp.0000000000000950] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Accurate analyses of the delayed effects of acute radiation exposure in survivors of the hematopoietic acute radiation syndrome are hampered by low numbers of mice for examination due to high lethality from the acute syndrome, increased morbidity and mortality in survivors, high cost of husbandry for long-term studies, biological variability, and inconsistencies of models from different laboratories complicating meta-analyses. To address this, a compilation of 38 similar hematopoietic acute radiation syndrome studies conducted over a 7-y period in the authors' laboratory, comprising more than 1,500 irradiated young adult C57BL/6 mice and almost 600 day-30 survivors, was assessed for hematopoietic delayed effects of acute radiation exposure at various times up to 30 mo of age. Significant loss of long-term repopulating potential of phenotypically defined primitive hematopoietic stem cells was documented in hematopoietic acute radiation syndrome survivors, as well as significant decreases in all hematopoietic lineages in peripheral blood, prominent myeloid skew, significantly decreased bone marrow cellularity, and numbers of lineage-negative Sca-1+ cKit+ CD150+ cells (KSL CD150+; the phenotype known to be enriched for hematopoietic stem cells), and increased cycling of KSL CD150+ cells. Studies interrogating the phenotype of bone marrow cells capable of initiation of suspension cultures and engraftment in competitive transplantation assays documented the phenotype of hematopoietic stem cells in hematopoietic acute radiation syndrome survivors to be the same as that in nonirradiated age-matched controls. This compilation study adds rigor and validity to our initial findings of persistent hematopoietic dysfunction in hematopoietic acute radiation syndrome survivors that arises at the level of the hematopoietic stem cell and which affects all classes of hematopoietic cells for the life of the survivor.
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Affiliation(s)
- Hui Lin Chua
- : Indiana University School of Medicine, Indianapolis, IN, USA
| | - P. Artur Plett
- : Indiana University School of Medicine, Indianapolis, IN, USA
| | - Alexa Fisher
- : Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Sasidhar Vemula
- : Indiana University School of Medicine, Indianapolis, IN, USA
| | - Hailin Feng
- : Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Tong Wu
- : Indiana University School of Medicine, Indianapolis, IN, USA
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7
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Nabinger SC, Chen S, Gao R, Yao C, Kobayashi M, Vemula S, Fahey AC, Wang C, Daniels C, Boswell HS, Sandusky GE, Mayo LD, Kapur R, Liu Y. Mutant p53 enhances leukemia-initiating cell self-renewal to promote leukemia development. Leukemia 2019; 33:1535-1539. [PMID: 30675010 PMCID: PMC9202234 DOI: 10.1038/s41375-019-0377-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 12/20/2018] [Accepted: 12/24/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Sarah C Nabinger
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Sisi Chen
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Rui Gao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Chonghua Yao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.,Department of Rheumatism, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Michihiro Kobayashi
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Aidan C Fahey
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Christine Wang
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Cecil Daniels
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - H Scott Boswell
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - George E Sandusky
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Lindsey D Mayo
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Yan Liu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, 46202, USA. .,Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
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8
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Abdel-Mohsen M, Tomescu C, Vadrevu S, Spivak A, Kuri-Cervantes L, Wu G, Cox K, Vemula S, Fair M, Lynn K, Buzon M, Martinez-Picado J, Betts M, Planelles V, Mounzer K, Howell B, Hazuda D, Tebas P, Montaner L. CD32+ CD4+ T Cells are HIV transcriptionally active rather than a resting reservoir. J Virus Erad 2017. [DOI: 10.1016/s2055-6640(20)30531-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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9
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Gao R, Chen S, Kobayashi M, Yu H, Zhang Y, Wan Y, Young SK, Soltis A, Yu M, Vemula S, Fraenkel E, Cantor A, Antipin Y, Xu Y, Yoder MC, Wek RC, Ellis SR, Kapur R, Zhu X, Liu Y. Bmi1 promotes erythroid development through regulating ribosome biogenesis. Stem Cells 2015; 33:925-38. [PMID: 25385494 DOI: 10.1002/stem.1896] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 10/23/2014] [Accepted: 10/26/2014] [Indexed: 12/26/2022]
Abstract
While Polycomb group protein Bmi1 is important for stem cell maintenance, its role in lineage commitment is largely unknown. We have identified Bmi1 as a novel regulator of erythroid development. Bmi1 is highly expressed in mouse erythroid progenitor cells and its deficiency impairs erythroid differentiation. BMI1 is also important for human erythroid development. Furthermore, we discovered that loss of Bmi1 in erythroid progenitor cells results in decreased transcription of multiple ribosomal protein genes and impaired ribosome biogenesis. Bmi1 deficiency stabilizes p53 protein, leading to upregulation of p21 expression and subsequent G0/G1 cell cycle arrest. Genetic inhibition of p53 activity rescues the erythroid defects seen in the Bmi1 null mice, demonstrating that a p53-dependent mechanism underlies the pathophysiology of the anemia. Mechanistically, Bmi1 is associated with multiple ribosomal protein genes and may positively regulate their expression in erythroid progenitor cells. Thus, Bmi1 promotes erythroid development, at least in part through regulating ribosome biogenesis. Ribosomopathies are human disorders of ribosome dysfunction, including Diamond-Blackfan anemia (DBA) and 5q- syndrome, in which genetic abnormalities cause impaired ribosome biogenesis, resulting in specific clinical phenotypes. We observed that BMI1 expression in human hematopoietic stem and progenitor cells from patients with DBA is correlated with the expression of some ribosomal protein genes, suggesting that BMI1 deficiency may play a pathological role in DBA and other ribosomopathies.
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Affiliation(s)
- Rui Gao
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana, USA
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10
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Barnard R, Tellers D, Howell B, Cook E, Swanson M, Vemula S, Li J, Carroll S, Hazuda D. In vitro analysis of different PKC agonists: latency reversal, T-cell activation, cytokine production and isoform selectivity. J Virus Erad 2015. [DOI: 10.1016/s2055-6640(20)31405-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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11
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Plett PA, Sampson CH, Chua HL, Jackson W, Vemula S, Sellamuthu R, Fisher A, Feng H, Wu T, MacVittie TJ, Orschell CM. The H-ARS Dose Response Relationship (DRR): Validation and Variables. Health Phys 2015; 109:391-8. [PMID: 26425900 PMCID: PMC4593318 DOI: 10.1097/hp.0000000000000354] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Manipulations of lethally-irradiated animals, such as for administration of pharmaceuticals, blood sampling, or other laboratory procedures, have the potential to induce stress effects that may negatively affect morbidity and mortality. To investigate this in a murine model of the hematopoietic acute radiation syndrome, 20 individual survival efficacy studies were grouped based on the severity of the administration (Admn) schedules of their medical countermeasure (MCM) into Admn 1 (no injections), Admn 2 (1-3 injections), or Admn 3 (29 injections or 6-9 oral gavages). Radiation doses ranged from LD30/30 to LD95/30. Thirty-day survival of vehicle controls in each group was used to construct radiation dose lethality response relationship (DRR) probit plots, which were compared statistically to the original DRR from which all LDXX/30 for the studies were obtained. The slope of the Admn 3 probit was found to be significantly steeper (5.190) than that of the original DRR (2.842) or Admn 2 (2.009), which were not significantly different. The LD50/30 for Admn 3 (8.43 Gy) was less than that of the original DRR (8.53 Gy, p < 0.050), whereas the LD50/30 of other groups were similar. Kaplan-Meier survival curves showed significantly worse survival of Admn 3 mice compared to the three other groups (p = 0.007). Taken together, these results show that stressful administration schedules of MCM can negatively impact survival and that dosing regimens should be considered when constructing DRR to use in survival studies.
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Affiliation(s)
- P. Artur Plett
- Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Hui Lin Chua
- Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Sasidhar Vemula
- Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Alexa Fisher
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Hailin Feng
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Tong Wu
- Indiana University School of Medicine, Indianapolis, IN, USA
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12
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Unthank JL, Miller SJ, Quickery AK, Ferguson EL, Wang M, Sampson CH, Chua HL, DiStasi MR, Feng H, Fisher A, Katz BP, Plett PA, Sandusky GE, Sellamuthu R, Vemula S, Cohen EP, MacVittie TJ, Orschell CM. Delayed Effects of Acute Radiation Exposure in a Murine Model of the H-ARS: Multiple-Organ Injury Consequent to <10 Gy Total Body Irradiation. Health Phys 2015; 109:511-21. [PMID: 26425910 PMCID: PMC4593322 DOI: 10.1097/hp.0000000000000357] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The threat of radiation exposure from warfare or radiation accidents raises the need for appropriate animal models to study the acute and chronic effects of high dose rate radiation exposure. The goal of this study was to assess the late development of fibrosis in multiple organs (kidney, heart, and lung) in survivors of the C57BL/6 mouse model of the hematopoietic-acute radiation syndrome (H-ARS). Separate groups of mice for histological and functional studies were exposed to a single uniform total body dose between 8.53 and 8.72 Gy of gamma radiation from a Cs radiation source and studied 1-21 mo later. Blood urea nitrogen levels were elevated significantly in the irradiated mice at 9 and 21 mo (from ∼22 to 34 ± 3.8 and 69 ± 6.0 mg dL, p < 0.01 vs. non-irradiated controls) and correlated with glomerosclerosis (29 ± 1.8% vs. 64 ± 9.7% of total glomeruli, p < 0.01 vs. non-irradiated controls). Glomerular tubularization and hypertrophy and tubular atrophy were also observed at 21 mo post-total body irradiation (TBI). An increase in interstitial, perivascular, pericardial and peribronchial fibrosis/collagen deposition was observed from ∼9-21 mo post-TBI in kidney, heart, and lung of irradiated mice relative to age-matched controls. Echocardiography suggested decreased ventricular volumes with a compensatory increase in the left ventricular ejection fraction. The results indicate that significant delayed effects of acute radiation exposure occur in kidney, heart, and lung in survivors of the murine H-ARS TBI model, which mirrors pathology detected in larger species and humans at higher radiation doses focused on specific organs.
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Affiliation(s)
- Joseph L. Unthank
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Steven J. Miller
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Ariel K. Quickery
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Ethan L. Ferguson
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Meijing Wang
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Carol H. Sampson
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Hui Lin Chua
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Matthew R. DiStasi
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - Hailin Feng
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Alexa Fisher
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Barry P. Katz
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN
| | - P. Artur Plett
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - George E. Sandusky
- Department of Pathology, Indiana University School of Medicine, Indianapolis, IN
| | | | - Sasidhar Vemula
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Eric P. Cohen
- Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI
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13
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Kim H, Prasain N, Vemula S, Ferkowicz MJ, Yoshimoto M, Voytik-Harbin SL, Yoder MC. Human platelet lysate improves human cord blood derived ECFC survival and vasculogenesis in three dimensional (3D) collagen matrices. Microvasc Res 2015; 101:72-81. [PMID: 26122935 DOI: 10.1016/j.mvr.2015.06.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 12/17/2022]
Abstract
Human cord blood (CB) is enriched in circulating endothelial colony forming cells (ECFCs) that display high proliferative potential and in vivo vessel forming ability. Since diminished ECFC survival is known to dampen the vasculogenic response in vivo, we tested how long implanted ECFC survive and generate vessels in three-dimensional (3D) type I collagen matrices in vitro and in vivo. We hypothesized that human platelet lysate (HPL) would promote cell survival and enhance vasculogenesis in the 3D collagen matrices. We report that the percentage of ECFC co-cultured with HPL that were alive was significantly enhanced on days 1 and 3 post-matrix formation, compared to ECFC alone containing matrices. Also, co-culture of ECFC with HPL displayed significantly more vasculogenic activity compared to ECFC alone and expressed significantly more pro-survival molecules (pAkt, p-Bad and Bcl-xL) in the 3D collagen matrices in vitro. Treatment with Akt1 inhibitor (A-674563), Akt2 inhibitor (CCT128930) and Bcl-xL inhibitor (ABT-263/Navitoclax) significantly decreased the cell survival and vasculogenesis of ECFC co-cultured with or without HPL and implicated activation of the Akt1 pathway as the critical mediator of the HPL effect on ECFC in vitro. A significantly greater average vessel number and total vascular area of human CD31(+) vessels were present in implants containing ECFC and HPL, compared to the ECFC alone implants in vivo. We conclude that implantation of ECFC with HPL in vivo promotes vasculogenesis and augments blood vessel formation via diminishing apoptosis of the implanted ECFC.
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Affiliation(s)
- Hyojin Kim
- Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Nutan Prasain
- Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Sasidhar Vemula
- Division of Hematology and Oncology, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Michael J Ferkowicz
- Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Momoko Yoshimoto
- Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Sherry L Voytik-Harbin
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN 47907, USA.
| | - Mervin C Yoder
- Department of Pediatrics, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 1044 W. Walnut Street, Indianapolis, IN 46202, USA.
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14
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Kobayashi M, Shelly W, Seo W, Vemula S, Liu Y, Taniuchi I, Yoshimoto M. Transplantable B-1 progenitor cells are present in the fetal liver of hematopoietic stem cell deficient embryos. Exp Hematol 2014. [DOI: 10.1016/j.exphem.2014.07.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Richardson MR, Robbins EP, Vemula S, Critser PJ, Whittington C, Voytik-Harbin SL, Yoder MC. Angiopoietin-like protein 2 regulates endothelial colony forming cell vasculogenesis. Angiogenesis 2014; 17:675-83. [PMID: 24563071 DOI: 10.1007/s10456-014-9423-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 02/17/2014] [Indexed: 11/28/2022]
Abstract
Angiopoietin-like 2 (ANGPTL2) has been reported to induce sprouting angiogenesis; however, its role in vasculogenesis, the de novo lumenization of endothelial cells (EC), remains unexplored. We sought to investigate the potential role of ANGPTL2 in regulating human cord blood derived endothelial colony forming cell (ECFC) vasculogenesis through siRNA mediated inhibition of ANGPTL2 gene expression. We found that ECFCs in which ANGPTL2 was diminished displayed a threefold decrease in in vitro lumenal area whereas addition of exogenous ANGPTL2 protein domains to ECFCs lead to increased lumen formation within a 3 dimensional (3D) collagen assay of vasculogenesis. ECFC migration was attenuated by 36 % via ANGPTL2 knockdown (KD) although proliferation and apoptosis were not affected. We subsequently found that c-Jun NH2-terminal kinase (JNK), but not ERK1/2, phosphorylation was decreased upon ANGPTL2 KD, and expression of membrane type 1 matrix metalloproteinase (MT1-MMP), known to be regulated by JNK and a critical regulator of EC migration and 3D lumen formation, was decreased in lumenized structures in vitro derived from ANGPTL2 silenced ECFCs. Treatment of ECFCs in 3D collagen matrices with either a JNK inhibitor or exogenous rhTIMP-3 (an inhibitor of MT1-MMP activity) resulted in a similar phenotype of decreased vascular lumen formation as observed with ANGPTL2 KD, whereas stimulation of JNK activity increased vasculogenesis. Based on gene silencing, pharmacologic, cellular, and biochemical approaches, we conclude that ANGPTL2 positively regulates ECFC vascular lumen formation likely through its effects on migration and in part by activating JNK and increasing MT1-MMP expression.
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Affiliation(s)
- Matthew R Richardson
- Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, R4-W125, Indianapolis, IN, 46202, USA
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16
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Choi E, Kraus MRC, Lemaire LA, Yoshimoto M, Vemula S, Potter LA, Manduchi E, Stoeckert CJ, Grapin-Botton A, Magnuson MA. Dual lineage-specific expression of Sox17 during mouse embryogenesis. Stem Cells 2013; 30:2297-308. [PMID: 22865702 DOI: 10.1002/stem.1192] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Sox17 is essential for both endoderm development and fetal hematopoietic stem cell (HSC) maintenance. While endoderm-derived organs are well known to originate from Sox17-expressing cells, it is less certain whether fetal HSCs also originate from Sox17-expressing cells. By generating a Sox17(GFPCre) allele and using it to assess the fate of Sox17-expressing cells during embryogenesis, we confirmed that both endodermal and a part of definitive hematopoietic cells are derived from Sox17-positive cells. Prior to E9.5, the expression of Sox17 is restricted to the endoderm lineage. However, at E9.5 Sox17 is expressed in the endothelial cells (ECs) at the para-aortic splanchnopleural region that contribute to the formation of HSCs at a later stage. The identification of two distinct progenitor cell populations that express Sox17 at E9.5 was confirmed using fluorescence-activated cell sorting together with RNA-Seq to determine the gene expression profiles of the two cell populations. Interestingly, this analysis revealed differences in the RNA processing of the Sox17 mRNA during embryogenesis. Taken together, these results indicate that Sox17 is expressed in progenitor cells derived from two different germ layers, further demonstrating the complex expression pattern of this gene and suggesting caution when using Sox17 as a lineage-specific marker.
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Affiliation(s)
- Eunyoung Choi
- Center for Stem Cell Biology and Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee 37232-0494, USA
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17
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Wen Q, Goldenson B, Silver SJ, Schenone M, Dancik V, Huang Z, Wang LZ, Lewis TA, An WF, Li X, Bray MA, Thiollier C, Diebold L, Gilles L, Vokes MS, Moore CB, Bliss-Moreau M, Verplank L, Tolliday NJ, Mishra R, Vemula S, Shi J, Wei L, Kapur R, Lopez CK, Gerby B, Ballerini P, Pflumio F, Gilliland DG, Goldberg L, Birger Y, Izraeli S, Gamis AS, Smith FO, Woods WG, Taub J, Scherer CA, Bradner JE, Goh BC, Mercher T, Carpenter AE, Gould RJ, Clemons PA, Carr SA, Root DE, Schreiber SL, Stern AM, Crispino JD. Identification of regulators of polyploidization presents therapeutic targets for treatment of AMKL. Cell 2012; 150:575-89. [PMID: 22863010 DOI: 10.1016/j.cell.2012.06.032] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 02/03/2012] [Accepted: 06/04/2012] [Indexed: 01/04/2023]
Abstract
The mechanism by which cells decide to skip mitosis to become polyploid is largely undefined. Here we used a high-content image-based screen to identify small-molecule probes that induce polyploidization of megakaryocytic leukemia cells and serve as perturbagens to help understand this process. Our study implicates five networks of kinases that regulate the switch to polyploidy. Moreover, we find that dimethylfasudil (diMF, H-1152P) selectively increased polyploidization, mature cell-surface marker expression, and apoptosis of malignant megakaryocytes. An integrated target identification approach employing proteomic and shRNA screening revealed that a major target of diMF is Aurora kinase A (AURKA). We further find that MLN8237 (Alisertib), a selective inhibitor of AURKA, induced polyploidization and expression of mature megakaryocyte markers in acute megakaryocytic leukemia (AMKL) blasts and displayed potent anti-AMKL activity in vivo. Our findings provide a rationale to support clinical trials of MLN8237 and other inducers of polyploidization and differentiation in AMKL.
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Affiliation(s)
- Qiang Wen
- Division of Hematology/Oncology, Northwestern University, Chicago, IL 60611, USA
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18
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Krishnan S, Mali RS, Koehler KR, Vemula S, Chatterjee A, Ghosh J, Ramdas B, Ma P, Hashino E, Kapur R. Class I(A) PI3Kinase regulatory subunit, p85α, mediates mast cell development through regulation of growth and survival related genes. PLoS One 2012; 7:e28979. [PMID: 22238586 PMCID: PMC3251560 DOI: 10.1371/journal.pone.0028979] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 11/18/2011] [Indexed: 12/04/2022] Open
Abstract
Stem cell factor (SCF) mediated KIT receptor activation plays a pivotal role in mast cell growth, maturation and survival. However, the signaling events downstream from KIT are poorly understood. Mast cells express multiple regulatory subunits of class 1A PI3Kinase (PI3K) including p85α, p85β, p50α, and p55α. While it is known that PI3K plays an essential role in mast cells; the precise mechanism by which these regulatory subunits impact specific mast cell functions including growth, survival and cycling are not known. We show that loss of p85α impairs the growth, survival and cycling of mast cell progenitors (MCp). To delineate the molecular mechanism (s) by which p85α regulates mast cell growth, survival and cycling, we performed microarray analyses to compare the gene expression profile of MCps derived from WT and p85α-deficient mice in response to SCF stimulation. We identified 151 unique genes exhibiting altered expression in p85α-deficient cells in response to SCF stimulation compared to WT cells. Functional categorization based on DAVID bioinformatics tool and Ingenuity Pathway Analysis (IPA) software relates the altered genes due to lack of p85α to transcription, cell cycle, cell survival, cell adhesion, cell differentiation, and signal transduction. Our results suggest that p85α is involved in mast cell development through regulation of expression of growth, survival and cell cycle related genes.
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Affiliation(s)
- Subha Krishnan
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Raghuveer Singh Mali
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Karl R. Koehler
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Sasidhar Vemula
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Anindya Chatterjee
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Joydeep Ghosh
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Baskar Ramdas
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Peilin Ma
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Eri Hashino
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Reuben Kapur
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
- * E-mail:
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19
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Ma P, Vemula S, Munugalavadla V, Chen J, Sims E, Borneo J, Kondo T, Ramdas B, Mali RS, Li S, Hashino E, Takemoto C, Kapur R. Balanced interactions between Lyn, the p85alpha regulatory subunit of class I(A) phosphatidylinositol-3-kinase, and SHIP are essential for mast cell growth and maturation. Mol Cell Biol 2011; 31:4052-62. [PMID: 21791602 PMCID: PMC3187372 DOI: 10.1128/mcb.05750-11] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 06/28/2011] [Accepted: 07/09/2011] [Indexed: 01/01/2023] Open
Abstract
The growth and maturation of bone marrow-derived mast cells (BMMCs) from precursors are regulated by coordinated signals from multiple cytokine receptors, including KIT. While studies conducted using mutant forms of these receptors lacking the binding sites for Src family kinases (SFKs) and phosphatidylinositol-3-kinase (PI3K) suggest a role for these signaling molecules in regulating growth and survival, how complete loss of these molecules in early BMMC progenitors (MCps) impacts maturation and growth during all phases of mast cell development is not fully understood. We show that the Lyn SFK and the p85α subunit of class I(A) PI3K play opposing roles in regulating the growth and maturation of BMMCs in part by regulating the level of PI3K. Loss of Lyn in BMMCs results in elevated PI3K activity and hyperactivation of AKT, which accelerates the rate of BMMC maturation due in part to impaired binding and phosphorylation of SHIP via Lyn's unique domain. In the absence of Lyn's unique domain, BMMCs behave in a manner similar to that of Lyn- or SHIP-deficient BMMCs. Importantly, loss of p85α in Lyn-deficient BMMCs not only represses the hyperproliferation associated with the loss of Lyn but also represses their accelerated maturation. The accelerated maturation of BMMCs due to loss of Lyn is associated with increased expression of microphthalmia-associated transcription factor (Mitf), which is repressed in MCps deficient in the expression of both Lyn and p85α relative to controls. Our results demonstrate a crucial interplay of Lyn, SHIP, and p85α in regulating the normal growth and maturation of BMMCs, in part by regulating the activation of AKT and the expression of Mitf.
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Affiliation(s)
- Peilin Ma
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | | | - Jinbiao Chen
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | - Emily Sims
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | - Jovencio Borneo
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | - Takako Kondo
- Department of Otolaryngology-Head and Neck Surgery, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana
| | - Baskar Ramdas
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | | | - Shuo Li
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
| | - Eri Hashino
- Department of Otolaryngology-Head and Neck Surgery, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana
| | - Clifford Takemoto
- Division of Pediatric Hematology, The Johns Hopkins University, Baltimore, Maryland
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research
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20
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Mali RS, Ramdas B, Ma P, Shi J, Munugalavadla V, Sims E, Wei L, Vemula S, Nabinger SC, Goodwin CB, Chan RJ, Traina F, Visconte V, Tiu RV, Lewis TA, Stern AM, Wen Q, Crispino JD, Boswell HS, Kapur R. Rho kinase regulates the survival and transformation of cells bearing oncogenic forms of KIT, FLT3, and BCR-ABL. Cancer Cell 2011; 20:357-69. [PMID: 21907926 PMCID: PMC3207244 DOI: 10.1016/j.ccr.2011.07.016] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 06/11/2011] [Accepted: 07/26/2011] [Indexed: 12/24/2022]
Abstract
We show constitutive activation of Rho kinase (ROCK) in cells bearing oncogenic forms of KIT, FLT3, and BCR-ABL, which is dependent on PI3K and Rho GTPase. Genetic or pharmacologic inhibition of ROCK in oncogene-bearing cells impaired their growth as well as the growth of acute myeloid leukemia patient-derived blasts and prolonged the life span of mice bearing myeloproliferative disease. Downstream from ROCK, rapid dephosphorylation or loss of expression of myosin light chain resulted in enhanced apoptosis, reduced growth, and loss of actin polymerization in oncogene-bearing cells leading to significantly prolonged life span of leukemic mice. In summary we describe a pathway involving PI3K/Rho/ROCK/MLC that may contribute to myeloproliferative disease and/or acute myeloid leukemia in humans.
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MESH Headings
- Actins/metabolism
- Animals
- Apoptosis/genetics
- Cell Line, Tumor
- Cell Proliferation
- Cell Survival
- Cell Transformation, Neoplastic
- Fusion Proteins, bcr-abl/biosynthesis
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Humans
- Leukemia/metabolism
- Leukemia/mortality
- Leukemia/pathology
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/mortality
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Myeloproliferative Disorders/metabolism
- Myeloproliferative Disorders/mortality
- Myeloproliferative Disorders/pathology
- Myosin Light Chains/biosynthesis
- Myosin Light Chains/genetics
- Myosin Light Chains/metabolism
- Phosphatidylinositol 3-Kinases/biosynthesis
- Phosphorylation
- Protein-Tyrosine Kinases/biosynthesis
- Protein-Tyrosine Kinases/genetics
- Protein-Tyrosine Kinases/metabolism
- RNA Interference
- RNA, Small Interfering
- Signal Transduction/genetics
- Stem Cell Factor/biosynthesis
- Stem Cell Factor/genetics
- Stem Cell Factor/metabolism
- fms-Like Tyrosine Kinase 3/biosynthesis
- fms-Like Tyrosine Kinase 3/genetics
- fms-Like Tyrosine Kinase 3/metabolism
- rho GTP-Binding Proteins/biosynthesis
- rho-Associated Kinases/antagonists & inhibitors
- rho-Associated Kinases/genetics
- rho-Associated Kinases/metabolism
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Affiliation(s)
- Raghuveer Singh Mali
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Baskar Ramdas
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Peilin Ma
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Jianjian Shi
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | | | - Emily Sims
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Lei Wei
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Sasidhar Vemula
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Sarah C. Nabinger
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Charles B. Goodwin
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Rebecca J. Chan
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
| | - Fabiola Traina
- Dept of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic
| | - Valeria Visconte
- Dept of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic
| | - Ramon V. Tiu
- Dept of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic
| | | | | | - Qiang Wen
- Division of Hematology/Oncology, Northwestern University, Chicago, IL
| | - John D. Crispino
- Division of Hematology/Oncology, Northwestern University, Chicago, IL
| | - H. Scott Boswell
- Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, Indianapolis, IN
| | - Reuben Kapur
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN
- Corresponding Author: Reuben Kapur, Ph.D., Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, 1044 W. Walnut Street, Room 168, Indianapolis, IN 46202, , Phone: 317-274-4658, Fax: 317-274-8679
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21
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Lasater EA, Li F, Bessler WK, Estes ML, Vemula S, Hingtgen CM, Dinauer MC, Kapur R, Conway SJ, Ingram DA. Genetic and cellular evidence of vascular inflammation in neurofibromin-deficient mice and humans. J Clin Invest 2010; 120:859-70. [PMID: 20160346 DOI: 10.1172/jci41443] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 01/06/2010] [Indexed: 11/17/2022] Open
Abstract
Neurofibromatosis type 1 (NF1) results from mutations in the NF1 tumor suppressor gene, which encodes the protein neurofibromin. NF1 patients display diverse clinical manifestations, including vascular disease, which results from neointima formation and vessel occlusion. However, the pathogenesis of NF1 vascular disease remains unclear. Vessel wall homeostasis is maintained by complex interactions between vascular and bone marrow-derived cells (BMDCs), and neurofibromin regulates the function of each cell type. Therefore, utilizing cre/lox techniques and hematopoietic stem cell transplantation to delete 1 allele of Nf1 in endothelial cells, vascular smooth muscle cells, and BMDCs alone, we determined which cell lineage is critical for neointima formation in vivo in mice. Here we demonstrate that heterozygous inactivation of Nf1 in BMDCs alone was necessary and sufficient for neointima formation after vascular injury and provide evidence of vascular inflammation in Nf1+/- mice. Further, analysis of peripheral blood from NF1 patients without overt vascular disease revealed increased concentrations of inflammatory cells and cytokines previously linked to vascular inflammation and vasoocclusive disease. These data provide genetic and cellular evidence of vascular inflammation in NF1 patients and Nf1+/- mice and provide a framework for understanding the pathogenesis of NF1 vasculopathy and potential therapeutic and diagnostic interventions.
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Affiliation(s)
- Elisabeth A Lasater
- Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, 46202, USA
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22
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Rajashekhar G, Renwick A, Cook T, Vemula S, Kapur R, Schürmann G, Wagner P, Clauss M. Anti‐proliferative Properties of novel D‐Peptide‐VEGF‐Antagonists: Plausible Role in Anti‐angiogenic and Anti‐tumor Formation. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.634.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Sasidhar Vemula
- Herman B Wells Center for Pediatric ResearchIU School of MedicineIndianapolisIN
| | - Rueben Kapur
- Herman B Wells Center for Pediatric ResearchIU School of MedicineIndianapolisIN
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23
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Munugalavadla V, Vemula S, Sims EC, Krishnan S, Chen S, Yan J, Li H, Niziolek PJ, Takemoto C, Robling AG, Yang FC, Kapur R. The p85alpha subunit of class IA phosphatidylinositol 3-kinase regulates the expression of multiple genes involved in osteoclast maturation and migration. Mol Cell Biol 2008; 28:7182-98. [PMID: 18809581 PMCID: PMC2593377 DOI: 10.1128/mcb.00920-08] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Revised: 08/06/2008] [Accepted: 09/11/2008] [Indexed: 11/20/2022] Open
Abstract
Intracellular signals involved in the maturation and function of osteoclasts are poorly understood. Here, we demonstrate that osteoclasts express multiple regulatory subunits of class I(A) phosphatidylinositol 3-kinase (PI3-K) although the expression of the full-length form of p85alpha is most abundant. In vivo, deficiency of p85alpha results in a significantly greater number of trabeculae and significantly lower spacing between trabeculae as well as increased bone mass in both males and females compared to their sex-matched wild-type controls. Consistently, p85alpha(-/-) osteoclast progenitors show impaired growth and differentiation, which is associated with reduced activation of Akt and mitogen-activated protein kinase extracellular signal-regulated kinase 1 (Erk1)/Erk2 in vitro. Furthermore, a significant reduction in the ability of p85alpha(-/-) osteoclasts to adhere to as well as to migrate via integrin alphavbeta3 was observed, which was associated with reduced bone resorption. Microarray as well as quantitative real-time PCR analysis of p85alpha(-/-) osteoclasts revealed a significant reduction in the expression of several genes associated with the maturation and migration of osteoclasts, including microphathalmia-associated transcription factor, tartrate-resistant acid phosphatase, cathepsin K, and beta3 integrin. Restoring the expression of the full-length form of p85alpha but not the version with a deletion of the Src homology-3 domain restored the maturation of p85alpha(-/-) osteoclasts to wild-type levels. These results highlight the importance of the full-length version of the p85alpha subunit of class I(A) PI3-K in controlling multiple aspects of osteoclast functions.
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Affiliation(s)
- Veerendra Munugalavadla
- Department of Pediatrics, Herman B Wells Center for Pediatric Research,2 Indiana University School of Medicine, Indianapolis, Indiana 46202, USA
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24
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Borneo J, Munugalavadla V, Sims EC, Vemula S, Orschell CM, Yoder M, Kapur R. Src family kinase-mediated negative regulation of hematopoietic stem cell mobilization involves both intrinsic and microenvironmental factors. Exp Hematol 2007; 35:1026-37. [PMID: 17588471 PMCID: PMC2481405 DOI: 10.1016/j.exphem.2007.03.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Revised: 03/23/2007] [Accepted: 03/23/2007] [Indexed: 01/13/2023]
Abstract
OBJECTIVE The intracellular signals that contribute to granulocyte colony-stimulating factor (G-CSF) receptor induced stem cell mobilization are poorly characterized. METHODS We show enhanced G-CSF induced mobilization of stem cells in mice deficient in expression of Src family kinases (SFK-/-), which is associated with hypersensitivity of SFK-/- bone marrow cells to G-CSF as well as sustained activation of signal transducer and activator of transcription-3. RESULTS A proteome map of the bone marrow fluid derived from wild-type and SFK-/- mice revealed a significant global reduction in the number of proteins in SFK-/- mice compared to controls, which was associated with elevated matrix metalloproteinase-9 levels, reduced stromal-derived factor-1 expression, and enhanced breakdown of vascular cell adhesion molecule-1. Transplantation of wild-type or SFK-/- stem cells into wild-type mice and treatment with G-CSF recapitulated the G-CSF-induced increase in stem cell mobilization noted in SFK-/- nontransplanted mice; however, the increase was significantly less. G-CSF treatment of SFK-/- mice engrafted with wild-type stem cells also demonstrated a modest increase in stem cell mobilization compared to controls, however, the observed increase was greatest in mice completely devoid of SFKs. CONCLUSIONS These data suggest an involvement of both hematopoietic intrinsic and microenvironmental factors in Src kinase-mediated mobilization of stem cells and identify Src kinases as potential targets for modulating stem cell mobilization.
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Affiliation(s)
- Jovencio Borneo
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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