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Munk N, Daggy JK, Slaven JE, Evans E, Foote T, Laws B, Matthias MS, Bair MJ. Care ally-assisted massage for veterans with chronic neck pain: TOMCATT results. Contemp Clin Trials 2024:107561. [PMID: 38704120 DOI: 10.1016/j.cct.2024.107561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/12/2023] [Revised: 04/23/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
PURPOSE Chronic neck pain (CNP) is prevalent and challenging to treat. Despite evidence of massage's effectiveness for CNP, multiple accessibility barriers exist. The Trial Outcomes for Massage: Care Ally-Assisted vs. Therapist Treated (TOMCATT) study examined a care ally-assisted massage (CA-M) approach compared to a waitlist control prior to a study design modification (WL-C0). METHODS CA-M consisted of in-person training for veteran/care-ally dyads to learn a standardized 30-minue massage routine, instructional DVD, and printed treatment manual. Participants were to complete three care ally-assisted massage sessions weekly for 12-weeks. Outcomes collected at baseline, 1-, 3-, and 6-months included validated measures of neck pain severity and associated disability. Linear mixed-model approaches were used for analysis with 3-months as the primary outcome timepoint. RESULTS Participants (N = 203) were 56.7 ± 14 years old, 75% White, 15% female, and 75% married/partnered. Among 102 CA-M participants, 45% did not attend the in-person training and subsequently withdrew from the study and were more likely to be younger (p = .016) and employed (p = .004). Compared to WL-C0, CA-M participants had statistically significant reductions in pain-related disability at 3-months (-3.4, 95%CI = [-5.8, -1.0]; p = .006) and 6-months (-4.6, 95%CI = [-7.0, -2.1]; p < .001) and pain severity at 3-months (-1.3, 95%CI = [-1.9, -0.8]; p < .001) and 6-months (-1.0, 95%CI = [-1.6, -0.4]; p = .007), respectively. CONCLUSION In this analysis, CA-M led to greater reductions in CNP with disability and pain severity compared to WL-C0, despite treatment engagement and retention challenges. Future work is needed to determine how to better engage Veterans and their care-allies to attend CA-M training.
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Affiliation(s)
- N Munk
- Indiana University School of Health and Human Sciences, Indianapolis, Indiana, USA; Department of Health Sciences, USA; Australian Research Centre in Complementary and Integrative Medicine (ARCCIM), Massage & Myotherapy Australia Fellow and Visiting Faculty of Health, University of Technology Sydney, Sydney, Australia.
| | - J K Daggy
- Indiana University School of Medicine, Department of Biostatistics and Health Data Science, Indianapolis, IN, United States
| | - J E Slaven
- Indiana University School of Medicine, Department of Biostatistics and Health Data Science, Indianapolis, IN, United States
| | - E Evans
- Richard L. Roudebush VA Medical Center, USA; Center for Health Information and Communication, USA
| | - T Foote
- Richard L. Roudebush VA Medical Center, USA; Center for Health Information and Communication, USA
| | - B Laws
- Richard L. Roudebush VA Medical Center, USA; Center for Health Information and Communication, USA
| | - M S Matthias
- Richard L. Roudebush VA Medical Center, USA; Center for Health Information and Communication, USA; Indiana University School of Medicine and Regenstrief Institute, USA
| | - M J Bair
- Richard L. Roudebush VA Medical Center, USA; Center for Health Information and Communication, USA; Indiana University School of Medicine and Regenstrief Institute, USA
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Horseman T, Rittase WB, Slaven JE, Bradfield DT, Frank AM, Anderson JA, Hays EC, Ott AC, Thomas AE, Huppmann AR, Lee SH, Burmeister DM, Day RM. Ferroptosis, Inflammation, and Microbiome Alterations in the Intestine in the Göttingen Minipig Model of Hematopoietic-Acute Radiation Syndrome. Int J Mol Sci 2024; 25:4535. [PMID: 38674120 PMCID: PMC11050692 DOI: 10.3390/ijms25084535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 03/06/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Hematopoietic acute radiation syndrome (H-ARS) involves injury to multiple organ systems following total body irradiation (TBI). Our laboratory demonstrated that captopril, an angiotensin-converting enzyme inhibitor, mitigates H-ARS in Göttingen minipigs, with improved survival and hematopoietic recovery, as well as the suppression of acute inflammation. However, the effects of captopril on the gastrointestinal (GI) system after TBI are not well known. We used a Göttingen minipig H-ARS model to investigate captopril's effects on the GI following TBI (60Co 1.79 or 1.80 Gy, 0.42-0.48 Gy/min), with endpoints at 6 or 35 days. The vehicle or captopril (0.96 mg/kg) was administered orally twice daily for 12 days, starting 4 h post-irradiation. Ilea were harvested for histological, protein, and RNA analyses. TBI increased congestion and mucosa erosion and hemorrhage, which were modulated by captopril. GPX-4 and SLC7A11 were downregulated post-irradiation, consistent with ferroptosis at 6 and 35 days post-irradiation in all groups. Interestingly, p21/waf1 increased at 6 days in vehicle-treated but not captopril-treated animals. An RT-qPCR analysis showed that radiation increased the gene expression of inflammatory cytokines IL1B, TNFA, CCL2, IL18, and CXCL8, and the inflammasome component NLRP3. Captopril suppressed radiation-induced IL1B and TNFA. Rectal microbiome analysis showed that 1 day of captopril treatment with radiation decreased overall diversity, with increased Proteobacteria phyla and Escherichia genera. By 6 days, captopril increased the relative abundance of Enterococcus, previously associated with improved H-ARS survival in mice. Our data suggest that captopril mitigates senescence, some inflammation, and microbiome alterations, but not ferroptosis markers in the intestine following TBI.
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Affiliation(s)
- Timothy Horseman
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (T.H.); (D.M.B.)
| | - W. Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - Andrew M. Frank
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA;
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD 20817, USA
| | - Joseph A. Anderson
- Comparative Pathology Division, Department of Laboratory Animal Resources, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Evelyn C. Hays
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - Andrew C. Ott
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - Anjali E. Thomas
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
| | - Alison R. Huppmann
- Department of Biomedical Sciences, University of South Carolina School of Medicine, Greenville, SC 29605, USA;
| | - Sang-Ho Lee
- Pathology Department, Research Services, Naval Medical Research Center, Silver Spring, MD 20910, USA;
| | - David M. Burmeister
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (T.H.); (D.M.B.)
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA; (W.B.R.); (J.E.S.); (D.T.B.)
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3
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Day RM, Rittase WB, Slaven JE, Lee SH, Brehm GV, Bradfield DT, Muir JM, Wise SY, Fatanmi OO, Singh VK. Iron Deposition in the Bone Marrow and Spleen of Nonhuman Primates with Acute Radiation Syndrome. Radiat Res 2023; 200:593-600. [PMID: 37967581 PMCID: PMC10754359 DOI: 10.1667/rade-23-00107.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 05/24/2023] [Accepted: 10/23/2023] [Indexed: 11/17/2023]
Abstract
The risk of exposure to high levels of ionizing radiation from nuclear weapons or radiological accidents is an increasing world concern. Partial- or total-body exposure to high doses of radiation is potentially lethal through the induction of acute radiation syndrome (ARS). Hematopoietic cells are sensitive to radiation exposure; white blood cells primarily undergo apoptosis while red blood cells (RBCs) undergo hemolysis. Several laboratories demonstrated that the rapid hemolysis of RBCs results in the release of acellular iron into the blood. We recently demonstrated using a murine model of ARS after total-body irradiation (TBI) and the loss of RBCs, iron accumulated in the bone marrow and spleen, notably between 4-21 days postirradiation. Here, we investigated iron accumulation in the bone marrow and spleens from TBI nonhuman primates (NHPs) using histological stains. We observed trends in increased intracellular and extracellular brown pigmentation in the bone marrow after various doses of radiation, especially after 4-15 days postirradiation, but these differences did not reach significance. We observed a significant increase in Prussian blue-staining intracellular iron deposition in the spleen 13-15 days after 5.8-8.5 Gy of TBI. We observed trends of increased iron in the spleen after 30-60 days postirradiation, with varying doses of radiation, but these differences did not reach significance. The NHP model of ARS confirms our earlier findings in the murine model, showing iron deposition in the bone marrow and spleen after TBI.
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Affiliation(s)
- Regina M. Day
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - W. Bradley Rittase
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - John E. Slaven
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Sang-Ho Lee
- Pathology Department, Research Services, Naval Medical Research Center, Silver Spring, Maryland 20910
| | - Grace V. Brehm
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Dmitry T. Bradfield
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Jeannie M. Muir
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Stephen Y. Wise
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Oluseyi O. Fatanmi
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
| | - Vijay K. Singh
- Division of Radioprotectants, Department of Pharmacology and Molecular Therapeutics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814
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4
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Slaven JE, Wilkerson M, Soltis AR, Rittase WB, Bradfield DT, Bylicky M, Cary L, Tsioplaya A, Bouten R, Dalgard C, Day RM. Transcriptomic Profiling and Pathway Analysis of Mesenchymal Stem Cells Following Low Dose-Rate Radiation Exposure. Antioxidants (Basel) 2023; 12:antiox12020241. [PMID: 36829800 PMCID: PMC9951969 DOI: 10.3390/antiox12020241] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
Low dose-rate radiation exposure can occur in medical imaging, as background from environmental or industrial radiation, and is a hazard of space travel. In contrast with high dose-rate radiation exposure that can induce acute life-threatening syndromes, chronic low-dose radiation is associated with Chronic Radiation Syndrome (CRS), which can alter environmental sensitivity. Secondary effects of chronic low dose-rate radiation exposure include circulatory, digestive, cardiovascular, and neurological diseases, as well as cancer. Here, we investigated 1-2 Gy, 0.66 cGy/h, 60Co radiation effects on primary human mesenchymal stem cells (hMSC). There was no significant induction of apoptosis or DNA damage, and cells continued to proliferate. Gene ontology (GO) analysis of transcriptome changes revealed alterations in pathways related to cellular metabolism (cholesterol, fatty acid, and glucose metabolism), extracellular matrix modification and cell adhesion/migration, and regulation of vasoconstriction and inflammation. Interestingly, there was increased hypoxia signaling and increased activation of pathways regulated by iron deficiency, but Nrf2 and related genes were reduced. The data were validated in hMSC and human lung microvascular endothelial cells using targeted qPCR and Western blotting. Notably absent in the GO analysis were alteration pathways for DNA damage response, cell cycle inhibition, senescence, and pro-inflammatory response that we previously observed for high dose-rate radiation exposure. Our findings suggest that cellular gene transcription response to low dose-rate ionizing radiation is fundamentally different compared to high-dose-rate exposure. We hypothesize that cellular response to hypoxia and iron deficiency are driving processes, upstream of the other pathway regulation.
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Affiliation(s)
- John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
| | - Matthew Wilkerson
- Collaborative Health Initiative Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
| | - Anthony R. Soltis
- Collaborative Health Initiative Research Program, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
| | - W. Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
| | - Michelle Bylicky
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
| | - Lynnette Cary
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Alena Tsioplaya
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Roxane Bouten
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
| | - Clifton Dalgard
- The American Genome Center, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
- Correspondence: ; Tel.: +1-301-295-3236; Fax: +1-301-295-3220
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5
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Russ E, Davis CM, Slaven JE, Bradfield DT, Selwyn RG, Day RM. Comparison of the Medical Uses and Cellular Effects of High and Low Linear Energy Transfer Radiation. Toxics 2022; 10:toxics10100628. [PMID: 36287908 PMCID: PMC9609561 DOI: 10.3390/toxics10100628] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 05/14/2023]
Abstract
Exposure to ionizing radiation can occur during medical treatments, from naturally occurring sources in the environment, or as the result of a nuclear accident or thermonuclear war. The severity of cellular damage from ionizing radiation exposure is dependent upon a number of factors including the absorbed radiation dose of the exposure (energy absorbed per unit mass of the exposure), dose rate, area and volume of tissue exposed, type of radiation (e.g., X-rays, high-energy gamma rays, protons, or neutrons) and linear energy transfer. While the dose, the dose rate, and dose distribution in tissue are aspects of a radiation exposure that can be varied experimentally or in medical treatments, the LET and eV are inherent characteristics of the type of radiation. High-LET radiation deposits a higher concentration of energy in a shorter distance when traversing tissue compared with low-LET radiation. The different biological effects of high and low LET with similar energies have been documented in vivo in animal models and in cultured cells. High-LET results in intense macromolecular damage and more cell death. Findings indicate that while both low- and high-LET radiation activate non-homologous end-joining DNA repair activity, efficient repair of high-LET radiation requires the homologous recombination repair pathway. Low- and high-LET radiation activate p53 transcription factor activity in most cells, but high LET activates NF-kB transcription factor at lower radiation doses than low-LET radiation. Here we review the development, uses, and current understanding of the cellular effects of low- and high-LET radiation exposure.
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Affiliation(s)
- Eric Russ
- Graduate Program of Cellular and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Catherine M. Davis
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Reed G. Selwyn
- Department of Radiology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Correspondence:
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Rittase WB, Slaven JE, Suzuki YJ, Muir JM, Lee SH, Rusnak M, Brehm GV, Bradfield DT, Symes AJ, Day RM. Iron Deposition and Ferroptosis in the Spleen in a Murine Model of Acute Radiation Syndrome. Int J Mol Sci 2022; 23:ijms231911029. [PMID: 36232330 PMCID: PMC9570444 DOI: 10.3390/ijms231911029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/08/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Total body irradiation (TBI) can result in death associated with hematopoietic insufficiency. Although radiation causes apoptosis of white blood cells, red blood cells (RBC) undergo hemolysis due to hemoglobin denaturation. RBC lysis post-irradiation results in the release of iron into the plasma, producing a secondary toxic event. We investigated radiation-induced iron in the spleens of mice following TBI and the effects of the radiation mitigator captopril. RBC and hematocrit were reduced ~7 days (nadir ~14 days) post-TBI. Prussian blue staining revealed increased splenic Fe3+ and altered expression of iron binding and transport proteins, determined by qPCR, western blotting, and immunohistochemistry. Captopril did not affect iron deposition in the spleen or modulate iron-binding proteins. Caspase-3 was activated after ~7–14 days, indicating apoptosis had occurred. We also identified markers of iron-dependent apoptosis known as ferroptosis. The p21/Waf1 accelerated senescence marker was not upregulated. Macrophage inflammation is an effect of TBI. We investigated the effects of radiation and Fe3+ on the J774A.1 murine macrophage cell line. Radiation induced p21/Waf1 and ferritin, but not caspase-3, after ~24 h. Radiation ± iron upregulated several markers of pro-inflammatory M1 polarization; radiation with iron also upregulated a marker of anti-inflammatory M2 polarization. Our data indicate that following TBI, iron accumulates in the spleen where it regulates iron-binding proteins and triggers apoptosis and possible ferroptosis.
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Affiliation(s)
- W. Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Yuichiro J. Suzuki
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20007, USA
| | - Jeannie M. Muir
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Sang-Ho Lee
- Department of Laboratory Animal Research, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Milan Rusnak
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Grace V. Brehm
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Aviva J. Symes
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Correspondence: ; Tel.: +1-301-295-3236; Fax: +1-301-295-3220
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Rittase B, Slaven JE, Muir JM, Lee S, Rusnak M, Brehm G, Symes A, Day R. Iron Deposition in the Spleen in a Murine Model of Acute Radiation Syndrome. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r3435] [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)
- Bradley Rittase
- PharmacologyUniformed Services University of the Health SciencesBethesdaMD
| | - John E. Slaven
- PharmacologyUniformed Services University of the Health SciencesBethesdaMD
| | - Jeannie M. Muir
- PathologyUniformed Services University of the Health SciencesBethesdaMD
| | - Sang‐Ho Lee
- Department of Laboratory Animal ResearchUniformed Services University of the Health SciencesBethesdaMD
| | - Milan Rusnak
- PharmacologyUniformed Services University of the Health SciencesBethesdaMD
| | - Grace Brehm
- PharmacologyUniformed Services University of the Health SciencesBethesdaME
| | - Aviva Symes
- PharmacolgyUniformed Services University of the Health SciencesBethesdaMD
| | - Regina Day
- PharmacologyUniformed Services University of the Health SciencesBethesdaMD
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Rittase WB, Muir JM, Slaven JE, Bouten RM, Bylicky MA, Wilkins WL, Day RM. Deposition of Iron in the Bone Marrow of a Murine Model of Hematopoietic Acute Radiation Syndrome. Exp Hematol 2020; 84:54-66. [PMID: 32240658 DOI: 10.1016/j.exphem.2020.03.004] [Citation(s) in RCA: 5] [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: 02/21/2020] [Revised: 03/20/2020] [Accepted: 03/21/2020] [Indexed: 01/02/2023]
Abstract
Exposure to high-dose total body irradiation (TBI) can result in hematopoietic acute radiation syndrome (H-ARS), characterized by leukopenia, anemia, and coagulopathy. Death from H-ARS occurs from hematopoietic insufficiency and opportunistic infections. Following radiation exposure, red blood cells (RBCs) undergo hemolysis from radiation-induced hemoglobin denaturation, causing the release of iron. Free iron can have multiple detrimental biological effects, including suppression of hematopoiesis. We investigated the impact of radiation-induced iron release on the bone marrow following TBI and the potential impact of the ACE inhibitor captopril, which improves survival from H-ARS. C57BL/6J mice were exposed to 7.9 Gy, 60Co irradiation, 0.6 Gy/min (LD70-90/30). RBCs and reticulocytes were significantly reduced within 7 days of TBI, with the RBC nadir at 14-21 days. Iron accumulation in the bone marrow correlated with the time course of RBC hemolysis, with an ∼10-fold increase in bone marrow iron at 14-21 days post-irradiation, primarily within the cytoplasm of macrophages. Iron accumulation in the bone marrow was associated with increased expression of genes for iron binding and transport proteins, including transferrin, transferrin receptor 1, ferroportin, and integrin αMβ2. Expression of the gene encoding Nrf2, a transcription factor activated by oxidative stress, also increased at 21 days post-irradiation. Captopril did not alter iron accumulation in the bone marrow or expression of iron storage genes, but did suppress Nrf2 expression. Our study suggests that following TBI, iron is deposited in tissues not normally associated with iron storage, which may be a secondary mechanism of radiation-induced tissue injury.
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Affiliation(s)
- W Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Jeannie M Muir
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - John E Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Roxane M Bouten
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD
| | - Michelle A Bylicky
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health Bethesda, MD
| | - W Louis Wilkins
- Department of Laboratory Animal Research, Uniformed Services University of Health Sciences, Bethesda, MD
| | - Regina M Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD.
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Jalou H, Bandyopadhyay A, Chauhan D, Slaven JE, Harmon HM, Matt BH, Daftary AS. 0767 Outcomes Of Various Interventions For Sleep Disordered Breathing In Infants With Down Syndrome. Sleep 2018. [DOI: 10.1093/sleep/zsy061.766] [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: 11/14/2022] Open
Affiliation(s)
- H Jalou
- Section of Pediatric Pulmonology, Allergy and Sleep Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - A Bandyopadhyay
- Section of Pediatric Pulmonology, Allergy and Sleep Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - D Chauhan
- Indiana University School of Medicine, Indianapolis, IN
| | - J E Slaven
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN
| | - H M Harmon
- Section of Neonatal-Perinatal Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - B H Matt
- Department of Otolaryngology-Head &Neck Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - A S Daftary
- Section of Pediatric Pulmonology, Allergy and Sleep Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
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Bandyopadhyay A, Slaven JE, Rohr-Kirchgraber TM, Manchanda SK. 0712 Socio-Economic and Demographic Factors influencing Sleep Duration in Women. Sleep 2018. [DOI: 10.1093/sleep/zsy061.711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Bandyopadhyay
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - J E Slaven
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN
| | - T M Rohr-Kirchgraber
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - S K Manchanda
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
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Slaven JE, Andrew ME, Violanti JM, Burchfiel CM, Mnatsakanova A, Vila BJ. Dimensional analysis of actigraphic derived sleep data. Nonlinear Dynamics Psychol Life Sci 2008; 12:153-161. [PMID: 18384714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Nonlinear dimensional analyses can be a useful tool in understanding the underlying behavior of dynamical systems, including biological systems. Many biological functions can be modeled as chaotic processes, including sleep. Sleep data can be obtained from several methods, such as electroencephalograms, polysomnography, and actigraph. Actigraphy, because of its low level of invasiveness, is an increasingly popular method of obtaining sleep data. This study analyzed actigraphy data with nonlinear dimensional analyses to determine if such analytic methods would be useful in sleep studies. Participants wore actigraphs on their wrists, which recorded movement for several days. Several sleep quality variables, such as movement during sleep and total sleep time, were derived from these sleep data. These variables were used to determine whether the quality of sleep was good or poor. Lagged phase space plots were graphed and nonlinear parameters for the fractal dimension and the correlation dimension were computed for each participant. Descriptive and inferential statistics were performed to determine if the nonlinear parameters showed significant differences with respect to sleep quality.
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Affiliation(s)
- J E Slaven
- Centers for Disease Control and Prevention, 1095 Willowdale Rd., Morgantown, WV 26501, USA.
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Abstract
Accelerometer data quality can be inadequate due to data corruption or to non-compliance of the subject with regard to study protocols. We propose a simple statistical test to determine if accelerometer data are of good quality and can be used for analysis or if the data are of poor quality and should be discarded. We tested several data evaluation methods using a group of 105 subjects who wore Motionlogger actigraphs (Ambulatory Monitoring, Inc.) over a 15 day period to assess sleep quality in a study of health outcomes associated with stress among police officers. Using leave-one-out cross-validation and calibration-testing methods of discrimination statistics, error rates for the methods ranged from 0.0167 to 0.4046. We found that the best method was to use the overall average distance between consecutive time points and the overall average mean amplitude of consecutive time points. These values gave us a classification error rate of 0.0167. The average distance between points is a measure of smoothness in the data, and the average mean amplitude between points gave an average reading. Both of these values were then normed to determine a final statistic, K, which was then compared to a cut-off value, K(C), to determine data quality.
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Affiliation(s)
- J E Slaven
- Biostatistics and Epidemiology Branch, Health Effects Laboratory Division, National Institute of Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV 26501, USA.
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Sethi GK, Slaven JE, Kepes JJ, Pugh D, Thal AP. Primary sarcoma of the pulmonary artery. J Thorac Cardiovasc Surg 1972; 63:587-93. [PMID: 5014641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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