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Chandra D, Poole JA, Bailey KL, Staab E, Sweeter JM, DeVasure JM, Romberger DJ, Wyatt TA. Dimethylarginine dimethylaminohydrolase (DDAH) overexpression enhances wound repair in airway epithelial cells exposed to agricultural organic dust. Inhal Toxicol 2018; 30:133-139. [PMID: 29793367 DOI: 10.1080/08958378.2018.1474976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
OBJECTIVE Workers exposed to dusts from concentrated animal feeding operations have a high prevalence of pulmonary diseases. These exposures lead to chronic inflammation and aberrant airway remodeling. Previous work shows that activating cAMP-dependent protein kinase (PKA) enhances airway epithelial wound repair while activating protein kinase C (PKC) inhibits wound repair. Hog barn dust extracts slow cell migration and wound repair via a PKC-dependent mechanism. Further, blocking nitric oxide (NO) production in bronchial epithelial cells prevents PKA activation. We hypothesized that blocking an endogenous NO inhibitor, asymmetric dimethylarginine, by overexpressing dimethylarginine dimethylaminohydrolase mitigates the effects of hog dust extract on airway epithelial would repair. MATERIALS/METHODS We cultured primary tracheal epithelial cells in monolayers from both wild-type (WT) and dimethylarginine dimethylaminohydrolase overexpressing C57Bl/6 (DDAH1 transgenic) mice and measured wound repair using the electric cell impedance sensing system. RESULTS Wound closure in epithelial cells from WT mice occurred within 24 h in vitro. In contrast, treatment of the WT cell monolayers with 5% hog dust extract prevented significant NO-stimulated wound closure. In cells from DDAH1 transgenic mice, control wounds were repaired up to 8 h earlier than seen in WT mice. A significant enhancement of wound repair was observed in DDAH cells compared to WT cells treated with hog dust extract for 24 h. Likewise, cells from DDAH1 transgenic mice demonstrated increased NO and PKA activity and decreased hog dust extract-stimulated PKC. DISCUSSION/CONCLUSION Preserving the NO signal through endogenous inhibition of asymmetric dimethylarginine enhances wound repair even in the presence of dust exposure.
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Affiliation(s)
- Deepak Chandra
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas
| | - Jill A Poole
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas
| | - Kristina L Bailey
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas.,b Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE Douglas
| | - Elizabeth Staab
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas
| | - Jenea M Sweeter
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas
| | - Jane M DeVasure
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas
| | - Debra J Romberger
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas.,b Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE Douglas
| | - Todd A Wyatt
- a Pulmonary, Critical Care, Sleep and Allergy Division, Department of Internal Medicine , University of Nebraska Medical Center , Omaha , NE Douglas.,b Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha , NE Douglas.,c Department of Environmental, Agricultural and Occupational Health , University of Nebraska Medical Center , Omaha , NE Douglas
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Wells A, Romberger DJ, Thiele GM, Wyatt TA, Staab E, Heires AJ, Klassen LW, Duryee MJ, Mikuls TR, Dusad A, West WW, Wang D, Poole JA. Systemic IL-6 Effector Response in Mediating Systemic Bone Loss Following Inhalation of Organic Dust. J Interferon Cytokine Res 2016; 37:9-19. [PMID: 27875664 DOI: 10.1089/jir.2016.0048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Airway and skeletal diseases are prominent among agriculture workers. Repetitive inhalant exposures to agriculture organic dust extract (ODE) induces bone deterioration in mice; yet the mechanisms responsible for connecting the lung-bone inflammatory axis remain unclear. We hypothesized that the interleukin (IL)-6 effector response regulates bone deterioration following inhalant ODE exposures. Using an established intranasal inhalation exposure model, wild-type (WT) and IL-6 knockout (KO) mice were treated daily with ODE or saline for 3 weeks. ODE-induced airway neutrophil influx, cytokine/chemokine release, and lung pathology were not reduced in IL-6 KO animals compared to WT mice. Utilizing micro-computed tomography, analysis of tibia showed that loss of bone mineral density, volume, and deterioration of bone micro-architecture, and mechanical strength induced by inhalant ODE exposures in WT mice were absent in IL-6 KO animals. Compared to saline treatments, bone-resorbing osteoclasts and bone marrow osteoclast precursor populations were also increased in ODE-treated WT but not IL-6 KO mice. These results show that the systemic IL-6 effector pathway mediates bone deterioration induced by repetitive inhalant ODE exposures through an effect on osteoclasts, but a positive role for IL-6 in the airway was not demonstrated. IL-6 might be an important link in explaining the lung-bone inflammatory axis.
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Affiliation(s)
- Adam Wells
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Debra J Romberger
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska
| | - Geoffrey M Thiele
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Todd A Wyatt
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,4 Department of Environmental, Agricultural, and Occupational Health, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Elizabeth Staab
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Art J Heires
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska.,2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska
| | - Lynell W Klassen
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Michael J Duryee
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Ted R Mikuls
- 2 Veterans Affairs Nebraska-Western Iowa Health Care System , Omaha, Nebraska.,3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Anand Dusad
- 3 Rheumatology Division, Department of Medicine, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - William W West
- 5 Department of Pathology and Microbiology, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Dong Wang
- 6 Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
| | - Jill A Poole
- 1 Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center , The Nebraska Medical Center, Omaha, Nebraska
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3
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Staab E, Thiele GM, Clarey D, Wyatt TA, Romberger DJ, Wells AD, Dusad A, Wang D, Klassen LW, Mikuls TR, Duryee MJ, Poole JA. Toll-Like Receptor 4 Signaling Pathway Mediates Inhalant Organic Dust-Induced Bone Loss. PLoS One 2016; 11:e0158735. [PMID: 27479208 PMCID: PMC4968800 DOI: 10.1371/journal.pone.0158735] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 03/17/2016] [Accepted: 06/21/2016] [Indexed: 01/06/2023] Open
Abstract
Agriculture workers have increased rates of airway and skeletal disease. Inhalant exposure to agricultural organic dust extract (ODE) induces bone deterioration in mice; yet, mechanisms underlying lung-bone crosstalk remain unclear. Because Toll-like receptor 2 (TLR2) and TLR4 are important in mediating the airway consequences of ODE, this study investigated their role in regulating bone responses. First, swine facility ODE stimulated wild-type (WT) bone marrow macrophages to form osteoclasts, and this finding was inhibited in TLR4 knock-out (KO), but not TLR2 KO cells. Next, using an established intranasal inhalation exposure model, WT, TLR2 KO and TLR4 KO mice were treated daily with ODE or saline for 3 weeks. ODE-induced airway neutrophil influx and cytokine/chemokine release were similarly reduced in TLR2 and TLR4 KO animals as compared to WT mice. Utilizing micro-computed tomography (CT), analysis of tibia showed loss of bone mineral density, volume and deterioration of bone micro-architecture and mechanical strength induced by ODE in WT mice were significantly reduced in TLR4 but not TLR2 KO animals. Bone marrow osteoclast precursor cell populations were analyzed by flow cytometry from exposed animals. In WT animals, exposure to inhalant ODE increased osteoclast precursor cell populations as compared to saline, an effect that was reduced in TLR4 but not TLR2 KO mice. These results show that TLR2 and TLR4 pathways mediate ODE-induced airway inflammation, but bone deterioration consequences following inhalant ODE treatment is strongly dependent upon TLR4. Thus, the TLR4 signaling pathway appears critical in regulating the lung-bone inflammatory axis to microbial component-enriched organic dust exposures.
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Affiliation(s)
- Elizabeth Staab
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Geoffrey M. Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Dillon Clarey
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Todd A. Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
- Department of Environmental, Agricultural, and Occupational Health, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Debra J. Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
| | - Adam D. Wells
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Anand Dusad
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Dong Wang
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Lynell W. Klassen
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Ted R. Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Michael J. Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, United States of America
- Rheumatology Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
| | - Jill A. Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America
- * E-mail:
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4
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Poole JA, Wyatt TA, Romberger DJ, Staab E, Simet S, Reynolds SJ, Sisson JH, Kielian T. MyD88 in lung resident cells governs airway inflammatory and pulmonary function responses to organic dust treatment. Respir Res 2015; 16:111. [PMID: 26376975 PMCID: PMC4574163 DOI: 10.1186/s12931-015-0272-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 09/03/2015] [Indexed: 11/10/2022] Open
Abstract
Inhalation of organic dusts within agriculture environments contributes to the development and/or severity of airway diseases, including asthma and chronic bronchitis. MyD88 KO (knockout) mice are nearly completely protected against the inflammatory and bronchoconstriction effects induced by acute organic dust extract (ODE) treatments. However, the contribution of MyD88 in lung epithelial cell responses remains unclear. In the present study, we first addressed whether ODE-induced changes in epithelial cell responses were MyD88-dependent by quantitating ciliary beat frequency and cell migration following wounding by electric cell-substrate impedance sensing. We demonstrate that the normative ciliary beat slowing response to ODE is delayed in MyD88 KO tracheal epithelial cells as compared to wild type (WT) control. Similarly, the normative ODE-induced slowing of cell migration in response to wound repair was aberrant in MyD88 KO cells. Next, we created MyD88 bone marrow chimera mice to investigate the relative contribution of MyD88-dependent signaling in lung resident (predominately epithelial cells) versus hematopoietic cells. Importantly, we demonstrate that ODE-induced airway hyperresponsiveness is MyD88-dependent in lung resident cells, whereas MyD88 action in hematopoietic cells is mainly responsible for ODE-induced TNF-α release. MyD88 signaling in lung resident and hematopoietic cells are necessary for ODE-induced IL-6 and neutrophil chemoattractant (CXCL1 and CXCL2) release and neutrophil influx. Collectively, these findings underscore an important role for MyD88 in lung resident cells for regulating ciliary motility, wound repair and inflammatory responses to ODE, and moreover, show that airway hyperresponsiveness appears uncoupled from airway inflammatory consequences to organic dust challenge in terms of MyD88 involvement.
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Affiliation(s)
- Jill A Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.
| | - Todd A Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.,Department of Environmental, Agricultural & Occupational Health, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.,VA Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
| | - Debra J Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA.,Department of Environmental, Agricultural & Occupational Health, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Elizabeth Staab
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Samantha Simet
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Stephen J Reynolds
- High Plains Intermountain Center for Agricultural Health and Safety, Department of Environmental and Radiological Health Sciences, Colorado State University, Ft. Collins, CO, USA
| | - Joseph H Sisson
- Pulmonary, Critical Care, Sleep & Allergy Division, Department of Internal Medicine, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
| | - Tammy Kielian
- Department of Pathology and Microbiology, University of Nebraska Medical Center, 985990 Nebraska Medical Center, Omaha, NE, 68198-5990, USA
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Poole JA, Romberger DJ, Wyatt TA, Staab E, VanDeGraaff J, Thiele GM, Dusad A, Klassen LW, Duryee MJ, Mikuls TR, West WW, Wang D, Bailey KL. Age Impacts Pulmonary Inflammation and Systemic Bone Response to Inhaled Organic Dust Exposure. J Toxicol Environ Health A 2015; 78:1201-16. [PMID: 26436836 PMCID: PMC4706168 DOI: 10.1080/15287394.2015.1075165] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 05/05/2023]
Abstract
Agricultural workers have high rates of airway and skeletal health disease. Studies recently demonstrated that inhaled agricultural organic dust extract (ODE)-induced airway injury is associated with bone deterioration in an animal model. However, the effect of age in governing these responses to organic dusts is unclear, but might be important in future approaches. Young (7-9 wk) and older (12-14,o) male C57BL/6 mice received intranasal (i.n.) inhalation exposure to ODE from swine confinement facilities once or daily for 3 wk. Acute ODE-induced neutrophil influx and cytokine and chemokine (tumor necrosis factor [TNF]-α, interleukin [IL]-6, keratinocyte chemoattractant [CXCL1], macrophage inflammatory protein-2 [CXCL2]) airway production were reduced in older compared to young mice. Repetitive ODE treatment, however, increased lymphocyte recruitment and alveolar compartment histopathologic inflammatory changes in older mice. Whole lung cell infiltrate analysis revealed that young, but not older, mice repetitively treated with ODE demonstrated an elevated CD4:CD8 lymphocyte response. Acute inhalant ODE exposure resulted in a 4-fold and 1.5-fold rise in blood neutrophils in young and older mice, respectively. Serum IL-6 and CXCL1 levels were elevated in young and older mice i.n. exposed once to ODE, with increased CXCL1 levels in younger compared to older mice. Although older mice displayed reduced bone measurements compared to younger mice, younger rodents demonstrated ODE-induced decrease in bone mineral density, bone volume, and bone microarchitecture quality as determined by computed tomography (CT) analysis. Collectively, age impacts the airway injury and systemic inflammatory and bone loss response to inhalant ODE, suggesting an altered and enhanced immunologic response in younger as compared to older counterparts.
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Affiliation(s)
- Jill A. Poole
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Debra J. Romberger
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
| | - Todd A. Wyatt
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
| | - Elizabeth Staab
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Joel VanDeGraaff
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Geoffrey M. Thiele
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
- Rheumatology Division; Department of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Anand Dusad
- Rheumatology Division; Department of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Lynell W. Klassen
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
- Rheumatology Division; Department of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Michael J. Duryee
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
- Rheumatology Division; Department of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Ted R. Mikuls
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
- Rheumatology Division; Department of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - William W. West
- Department of Pathology in the College of Medicine, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Dong Wang
- Pharmaceutical Sciences in the College of Pharmacy, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
| | - Kristina L. Bailey
- Pulmonary, Critical Care, Sleep & Allergy Division, University of Nebraska Medical Center, 985300 The Nebraska Medical Center, Omaha, NE 68198-5300
- Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105
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Abstract
The National Cancer Institute organized a workshop entitled "Image Archive Management" that was presented on August 28 and 29, 2000, at the Natcher Conference Center on the National Institutes of Health (NIH) campus. The purpose of this workshop was to solicit expert input for the planned development of an archival system to make imaging databases readily accessible by the broad scientific community. The specific goals were to (a) define the technical requirements for a virtual archive of images used in oncology, (b) define the policy issues for access to these images, (c) recommend a process and phases for implementation of a robust imaging archival system, (d) review how this effort could be expanded and coupled with other ongoing efforts by NIH and other organizations interested in imaging, and (e) form an overall plan and policy to allow interoperability of image data archives. Representatives who attended the workshop came from academia, government agencies, and large and small businesses. A preliminary report was generated, as outlined herein, and additional reports are anticipated from the steering committee being organized as one of this workshop's recommendations, which is expected to be active by summer 2001. Additional information, including the list of participants in this workshop, is available at the Biomedical Imaging Program Web site (http://www.nci.nih.gov/bip/).
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Affiliation(s)
- E Staab
- Biomedical Imaging Program, National Cancer Institute, Rockville, MD 20852, USA
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Abstract
Preliminary clinical studies suggest that spiral computed tomography (CT) of the lungs can improve early detection of lung cancer in high-risk individuals. More clinical studies are needed, however, before public health recommendations can be proposed for population-based screening. Spiral CT generates large-volume data sets and thus poses problems in terms of implementation of efficient and cost-effective screening methods. Image processing algorithms such as computer assisted diagnostic (CAD) methods have the potential to assist in lesion (eg, nodule) detection on spiral CT studies. CAD methods may also be used to characterize nodules by either assessing the stability or change in size of lesions based on evaluation of serial CT studies, or quantitatively measuring the temporal parameters related to contrast dynamics when using contrast material-enhanced CT studies. CAD methods therefore have the potential to enhance the sensitivity and specificity of spiral CT lung screening studies. Lung cancer screening studies now under investigation create an opportunity to develop an image database that will allow comparison and optimization of CAD algorithms. This database could serve as an important national resource for the academic and industrial research community that is currently involved in the development of CAD methods. The National Cancer Institute request for applications (RFA) (CA-01-001) has already been announced (April 2000) to establish and support a consortium of academic centers to develop this database, the consortium to be referred to as the Lung Image Database Consortium (LIDC). This RFA is now closed. Five academic sites have been selected to be members of the LIDC, the first meeting of this consortium is planned for spring of 2001, and a public meeting is to be held in 2002. This report is abstracted from the previously published RFA to serve as an example of how an initiative is developed by the National Cancer Institute to support a research resource. For specific details of the RFA, please access the following Internet site: http://www. nci.nih.gov/bip/NCI-DIPinisumm.htm#a11.
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Affiliation(s)
- L P Clarke
- Division of Cancer Treatment and Diagnosis, National Cancer Institute, Rockville, MD 20852, USA
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Honeyman J, Frost M, Staab E. Digital radiology display must fit variety of needs. Diagn Imaging (San Franc) 1994; 16:67-72. [PMID: 10146655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Jaques PF, Staab E, Richey W, Photopulos G, Swanton M. CT-assisted pelvic and abdominal aspiration biopsies in gynecological malignancy. Radiology 1978; 128:651-5. [PMID: 674632 DOI: 10.1148/128.3.651] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Twenty-four CT-directed biopsies were performed in 17 women with proved gynecological malignancy which had been treated previously by surgery, radiotherapy, chemotherapy or a combination of modalities. CT proved superior to ultrasound biopsy in that the presence of gas in the bowel does not hinder imaging and the use of contrast agents to outline bladder and ureters enables identification of pathological masses even in the presence of massive adhesions and anatomical distortion. Even in small lesions, CT can locate the tip of the needle. The technique, difficulties, specimen handling and clinical relevance are discussed.
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Abstract
We are reporting the first case, to our knowledge, of a venous embolus to a transplanted kidney. The embolus occurred five days after transplantation of a cadaver kidney in a 31-year-old woman who was receiving estrogen-progesterone therapy for menorrhagia. Five hours after acute onset of left flank pain and anuria, the embolus was identified at the anastomosis of the donor renal vein to the external iliac vein. The embolus was manipulated distally in the external iliac vein and excluded by proximal division of the vein. Recovery was eventually complete, despite two major postoperative complications, acute tubular necrosis and a perirenal hematoma secondary to heparin sodium therapy. Radionuclide scanning was critically important in establishing the diagnosis and in assessing the potential for the kidney to recover from acute tubular necrosis. On the basis of this experience, we believe that prompt surgical intervention is indicated for acute venous occlusion.
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Hollifield JW, Page DL, Smith C, Michelakis AM, Staab E, Rhamy R. Renin-secreting clear cell carcinoma of the kidney. Arch Intern Med 1975; 135:859-64. [PMID: 1130932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A young woman with mild to moderate hypertension and normal PRA, serum potassium levels, and urinary aldosterone excretion rate was found to have a renal tumor by selective renal arteriogram. Renal vein renin activity indicated an increased production of renin from the kidney containing the tumor. At surgery, a clear cell carcinoma of the kidney was found that contained renin activity in excess of the surrounding kidney tissue. The renin activity appeared identical to human kidney renin. Previous renin-producing tumors have been associated with severe hypertension, elevated plasma renin activity, hypokalemia, and elevated urinary aldosterone excretion. This case should call attention to the renin-secreting tumor as a cause of even mild hypertension.
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Abstract
Data are presented on the clinical application of radionuclide imaging to evaluate changes in cadaver transplant function in the immediate postoperative period. The method uses orthoiodohippuric acid (hippuran) administered IV, with scintillation imaging, and curve analysis by a digital computer. An initial study is always obtained 24 hours after transplantation. Serial studies are then obtained, as needed, to interpret the clinical course. Selected cases are presented which illustrate the use of this protocol in various clinical settings. In the oliguric patient serial studies have been of particular value. They have identified ATN so that over-enthusiastic treatment for rejection could be avoided. They have also identified acute rejection complicating ATN so that high dose steroid therapy could be administered appropriately. In the non-oliguric patient they have frequently contributed to the early diagnosis of acute rejection, and they have been useful in monitoring the effect and duration of treatment for severe rejection crisis. It is concluded that radionuclide imaging studies, when carefully applied and interpreted, are a valuable adjunct to the management of patients in this complex clinical setting.
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