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Birmingham JM, Wisnivesky J, Busse PJ. The effect of estrogen-containing birth control pills on the constituents of bradykinin expression in plasma. J Allergy Clin Immunol Glob 2024; 3:100226. [PMID: 38495866 PMCID: PMC10940926 DOI: 10.1016/j.jacig.2024.100226] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 03/19/2024]
Abstract
Background Hereditary angioedema with C1-inhibitor deficiency (HAE-C1INH) is a rare autosomal disorder presenting with recurrent angioedema. Estrogen-containing medications trigger angioedema in some patients, and conversely, progesterone may decrease attack frequency. The mechanism by which estrogen may exacerbate angioedema in HAE-C1INH is not well characterized. Objective Our aim was to investigate the link between estrogen and bradykinin constituents to better understand the specific underlying triggers that may exacerbate angioedema in patients with HAE-C1INH. Methods As estrogen is contraindicated for patients with HAE-C1INH, females without a history of angioedema were recruited to evaluate whether estrogen-containing oral contraceptive pills (OCPs) alter plasma protein levels of bradykinin, cleaved high-molecular-weight kininogen (cHK), and activated factor XII (FXIIa). Blood (plasma) was collected before initiation of OCP administration and 3 months thereafter. High-molecular-weight kininogen (HK) was measured by ELISA and FXIIa and cHK were analyzed by Western blot analysis. Results A total of 12 adult females without HAE-CINH (aged <40 years) had a median baseline plasma HK level of 33,976 ng/mL. After 3 months of OCP therapy, their median HK level increased to 38,202 ng/mL. With OCPs, there was also a significant increase in level of FXIIa protein (P <.01), as well as an increase in cHK protein level. Conclusion This preliminary study, performed in females without HAE-C1INH, suggests that estrogen may exacerbate angioedema by increasing the production of cHK and FXIIa.
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Affiliation(s)
- Janette M. Birmingham
- Division of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Juan Wisnivesky
- Division of Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Paula J. Busse
- Division of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
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Wisnivesky JP, Agrawal N, Ankam J, Gonzalez A, Federman A, Markowitz SB, Birmingham JM, Busse PJ. Inflammatory markers in world trade center workers with asthma: Associations with post traumatic stress disorder. PLoS One 2024; 19:e0297616. [PMID: 38349898 PMCID: PMC10863856 DOI: 10.1371/journal.pone.0297616] [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: 06/27/2023] [Accepted: 01/09/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Post-traumatic stress disorders (PTSD) is associated with worse asthma outcomes in individuals exposed to the World Trade Center (WTC) site. RESEARCH QUESTION Do WTC workers with coexisting PTSD and asthma have a specific inflammatory pattern that underlies the relationship with increased asthma morbidity? STUDY DESIGN AND METHODS We collected data on a cohort of WTC workers with asthma recruited from the WTC Health Program. Diagnosis of PTSD was ascertained with a Structured Clinical Interview for DSM-5 (Diagnostic and Statistical Manuel of Mental Disorders) and the severity of PTSD symptoms was assessed with the PTSD Checklist 5. We obtained blood and sputum samples to measure cytokines levels in study participants. RESULTS Of the 232 WTC workers with diagnosis of asthma in the study, 75 (32%) had PTSD. PTSD was significantly associated with worse asthma control (p = 0.002) and increased resource utilization (p = 0.0002). There was no significant association (p>0.05) between most blood or sputum cytokines with PTSD diagnosis or PCL-5 scores both in unadjusted and adjusted analyses. INTERPRETATION Our results suggest that PTSD is not associated with blood and sputum inflammatory markers in WTC workers with asthma. These findings suggest that other mechanisms likely explain the association between PTSD and asthma control in WTC exposed individuals.
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Affiliation(s)
- Juan P. Wisnivesky
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
- Division of Pulmonary and Critical Care Medicine, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
| | - Nikita Agrawal
- Division of Pulmonary and Critical Care Medicine, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
| | - Jyoti Ankam
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
| | - Adam Gonzalez
- Barry Commoners Center for Health and Environment, Queens College, City University of NY, NY, NY, United States of America
| | - Alex Federman
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
| | - Steven B. Markowitz
- Department of Psychiatry and Behavioral Health, Stony Brook University, Stony Brook, NY, United States of America
| | - Janette M. Birmingham
- Division of Allergy and Immunology, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
| | - Paula J. Busse
- Division of Allergy and Immunology, Icahn School of Medicine at Mount Sinai, NY, NY, United States of America
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Birmingham JM, Chesnova B, Wisnivesky JP, Calatroni A, Federman J, Bunyavanich S, Busse PJ. The Effect of Age on T-Regulatory Cell Number and Function in Patients With Asthma. Allergy Asthma Immunol Res 2021; 13:646-654. [PMID: 34212550 PMCID: PMC8255355 DOI: 10.4168/aair.2021.13.4.646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/01/2020] [Accepted: 12/25/2020] [Indexed: 11/20/2022]
Abstract
T-regulatory cells (Tregs) play a key role in suppressing effector cells and maintaining self-tolerance. Studies of younger adults and children suggest that insufficient differentiation and functional defects of Tregs may contribute to the development of asthma; however, data from older patients with asthma are limited. To address the effects of aging on the relationship of Treg frequency and function with clinical outcomes, we collected induced sputum (differential cell count and Treg frequency) and peripheral blood (Treg function and frequency) from aged (> 60 years of age) and younger (20–40 years old) patients with asthma. In younger patients, low Treg suppression was associated with significantly higher mean numbers of emergency department (ED) (1.8 vs. 0.17, P = 0.02) and urgent care visits (2.3 vs. 0.17, P = 0.01) for asthma, and decreased asthma control (mean Asthma Control Test [ACT] score, 17 vs. 21.3, P = 0.01) compared to those with high Treg suppression. In older patients, however, a lower Treg function was not significantly associated with ACT scores (18.2 vs. 13.4, P = 0.10), or the number of ED (P = 0.9) or urgent care visits (P = 0.2). Our data suggest that Tregs have a weak relationship with asthma control and clinical asthma outcomes in older patients and differ from findings in younger patients, where Tregs are more likely to play a protective role.
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Affiliation(s)
- Janette M Birmingham
- Divisions of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Bogdana Chesnova
- Divisions of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Juan P Wisnivesky
- Divisions of General Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Divisions of Pulmonary, Critical Care and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Jessie Federman
- Divisions of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Supinda Bunyavanich
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Division of Allergy and Immunology, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Paula J Busse
- Divisions of Allergy and Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Busse PJ, Christiansen SC, Birmingham JM, Overbey JR, Banerji A, Otani IM, Lumry W, Goryachkovsky A, Zuraw BL. Development of a health-related quality of life instrument for patients with hereditary angioedema living in the United States. J Allergy Clin Immunol Pract 2018; 7:1679-1683.e7. [PMID: 30550806 DOI: 10.1016/j.jaip.2018.11.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 11/16/2018] [Accepted: 11/19/2018] [Indexed: 11/15/2022]
Affiliation(s)
- Paula J Busse
- Division of Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY.
| | - Sandra C Christiansen
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California San Diego, La Jolla, Calif
| | - Janette M Birmingham
- Division of Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Jessica R Overbey
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Aleena Banerji
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Mass
| | - Iris M Otani
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California San Francisco, San Francisco, Calif
| | - William Lumry
- Division of Allergy/Immunology, Department of Internal Medicine, University of Texas Southwestern Medical School, Dallas, Texas
| | - Anna Goryachkovsky
- Division of Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Bruce L Zuraw
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California San Diego, La Jolla, Calif
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Busse PJ, Birmingham JM, Calatroni A, Manzi J, Goryachokovsky A, Fontela G, Federman AD, Wisnivesky JP. Effect of aging on sputum inflammation and asthma control. J Allergy Clin Immunol 2016; 139:1808-1818.e6. [PMID: 27725186 DOI: 10.1016/j.jaci.2016.09.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 08/30/2016] [Accepted: 09/14/2016] [Indexed: 12/22/2022]
Abstract
BACKGROUND Aged asthmatic patients experience increased morbidity and mortality. Knowledge of the aging effect on airway inflammation and asthma control is limited. OBJECTIVE We sought to compare airway inflammation and its relationship to asthma control in aged versus younger patients and determine whether differences are asthma specific or caused by "inflamm-aging." METHODS We performed a prospective study of aged (>60 years) and younger (21-40 years) inner-city patients with asthma. After a run-in period to control for inhaled corticosteroid use, induced sputum was collected. Age-matched nonasthmatic control subjects were included to measure age-related inflammatory changes. RESULTS Aged (mean age, 67.9 ± 5.1 years; n = 35) compared with younger (mean age, 30.8 ± 5.9 years; n = 37) asthmatic patients had significantly worse asthma control and lower FEV1. Aged asthmatic patients had higher sputum neutrophil (30.5 × 104/mL and 23.1%) and eosinophil (7.0 × 104/mL and 3.8%) numbers and percentages compared with younger patients (neutrophils, 13.0 × 104/mL [P < .01] and 6.9% [P < .01]; eosinophils, 2.0 × 104/mL [P < .01] and 1.2% [P < .01]). Aged asthmatic patients had higher sputum IL-6 (P < .01) and IL-8 (P = .01) levels. No significant inflammatory differences between aged and younger control subjects were observed. In aged asthmatic patients increased sputum IL-6 and macrophage inflammatory protein 3α/CCL20 levels were significantly associated with decreased asthma control and increased sputum neutrophil numbers and IL-1β, IL-6, and macrophage inflammatory protein 3α/CCL20 levels were associated with hospitalization. CONCLUSIONS The inflammatory patterns of aged versus younger asthmatic patients are associated with increased sputum neutrophil and eosinophil values and cytokine levels related to neutrophil recruitment. Differences in airway inflammation can contribute to diminished asthma control in the aged. Further understanding of asthma pathophysiology in aged patients is needed to improve management of this vulnerable population.
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Affiliation(s)
- Paula J Busse
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY.
| | - Janette M Birmingham
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
| | | | - Joseph Manzi
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Anna Goryachokovsky
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Giselle Fontela
- Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Alex D Federman
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Juan P Wisnivesky
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY; Division of Pulmonary, Critical Care and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
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Birmingham JM, Gillespie VL, Srivastava K, Li XM, Busse PJ. Influenza A infection enhances antigen-induced airway inflammation and hyperresponsiveness in young but not aged mice. Clin Exp Allergy 2015; 44:1188-99. [PMID: 25039815 DOI: 10.1111/cea.12365] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 06/27/2014] [Accepted: 06/30/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND Although morbidity and mortality rates from asthma are highest in patients > 65 years of age, the effect of older age on airway inflammation in asthma is not well established. OBJECTIVE To investigate age-related differences in the promotion of allergic inflammation after influenza A viral respiratory infection on antigen-specific IgE production, antigen-induced airway inflammation and airway hyperresponsiveness in mice. METHODS To accomplish this objective, the following model system was used. Young (6 week) and aged (18 months) BALB/c mice were first infected with a non-lethal dose of influenza virus A (H/HKx31). Mice were then ovalbumin (OVA)-sensitized during the acute infection (3-days post inoculation) and then chronically underwent challenge to the airways with OVA. Forty-eight hours after the final OVA challenge, airway hyperresponsiveness (AHR), bronchoalveolar fluid (BALF) cellular and cytokine profile, antigen-specific IgE and IgG1, and lung tissue inflammation were measured. RESULTS Age-specific differences were noted on the effect of a viral infection, allergic sensitization, airway inflammation and airway hyperresponsiveness. Serum OVA-specific IgE was significantly increased in only the aged mice infected with influenza virus. Despite greater morbidity (e.g. weight loss and sickness scores) during the acute infection in the 18-month old mice that were OVA-sensitized, there was little effect on the AHR and BALF cellular differential. In contrast, BALF neutrophils and AHR increased, but eosinophils decreased in 6-week mice that were OVA-sensitized during an acute influenza infection. CONCLUSION With increased age in a mouse model, viral infection prior to antigen sensitization affects the airway and systemic allergic response differently. These differences may reflect distinct phenotypic features of allergic inflammation in older patients with asthma.
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Affiliation(s)
- J M Birmingham
- Division of Clinical Immunology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Abstract
BACKGROUND The effect of increased age on the induction of oral tolerance by low-dose antigen feeding and its effect on the response to antigen airway challenge in aged mice have not been well characterized. OBJECTIVE To determine whether oral tolerance can be induced in aged mice and its impact on the development of allergic airway inflammation. METHODS Younger (6 weeks old) and aged (18 months old) mice were fed ovalbumin (OVA) prior to sensitization to induce antigen tolerance. Serum antigen-specific immunoglobulins (Igs), bronchoalveolar lavage fluid (BALF), lung histology, enumeration of CD4 + Foxp3+ Treg cells, and airway hyperresponsiveness (AHR) were determined after the final antigen challenge. RESULTS Feeding antigen to aged mice prior to sensitization induced oral tolerance as determined by a decrease in antigen-specific IgE and IgG(1); however, the effect was greater in younger mice. Induction of oral tolerance was associated with a greater increase in airway Treg cells in the younger mice. Despite these differences, oral tolerance significantly suppressed features of asthma in aged mice, including BALF total cell and eosinophil numbers, cytokine production, and AHR. CONCLUSIONS Aged mice developed oral tolerance to antigen, which suppressed several features of allergic airway inflammation.
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Affiliation(s)
- Janette M Birmingham
- Division of Clinical Immunology, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA
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Fenton JI, Birmingham JM. Adipokine regulation of colon cancer: adiponectin attenuates interleukin-6-induced colon carcinoma cell proliferation via STAT-3. Mol Carcinog 2010; 49:700-9. [PMID: 20564347 DOI: 10.1002/mc.20644] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Obesity results in increased circulating levels of specific adipokines, which are associated with colon cancer risk. The disease state is associated with increased leptin, insulin, IGF-1, and IL-6. Conversely, adiponectin levels are decreased in obese individuals. Previously, we demonstrated adipokine-enhanced cell proliferation in preneoplastic, but not normal, colon epithelial cells, demonstrating a differential effect of adipokines on colon cancer progression in vitro. Using a model of late stage carcinoma cancer cell, namely murine MC-38 colon carcinoma cells, we compared the effect of obesity-associated adipokines (leptin, insulin, IGF-1, and IL-6) on MC-38 cell proliferation and determined whether adiponectin (full length or globular) could modulate adipokine-induced cell proliferation. We show that insulin and IL-6, but not leptin and IGF-1, induce proliferation in MC-38 cells. Adiponectin treatment of MC-38 cells did not inhibit insulin-induced cell proliferation but did inhibit IL-6-induced cell proliferation by decreasing STAT-3 phosphorylation and activation. Nitric oxide (NO) production was increased in MC-38 cells treated with IL-6; co-treatment with adiponectin blocked IL-6-induced iNOS and subsequent NO production. These data are compared to previously reported findings from our laboratory using the YAMC (model normal colon epithelial cells) and IMCE (model preneoplastic) cells. The cell lines are utilized to construct a model summarizing the hormonal consequences of obesity and the impact on the differential regulation of colon epithelial cells along the continuum to carcinoma. These data, taken together, highlight mechanisms involved in obesity-associated cancers and may lead to potential-targeted therapies.
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Affiliation(s)
- Jenifer I Fenton
- Department of Food Science and Human Nutrition, East Lansing, Michigan, USA
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Abstract
Adipose tissue secretes factors linked to colon cancer risk including leptin. A hallmark of cancer is sustained angiogenesis. While leptin promotes angiogenesis in adipose tissue, it is unknown whether leptin can induce epithelial cells to produce factors that may drive angiogenesis, vascular development and therefore cancer progression. The purpose of this study was to compare the effects of leptin-stimulated colon epithelial cells differing in adenomatous polyposis coli (Apc) genotype (gatekeeper tumor suppressor gene for colon cancer) on angiogenesis. We employed novel colonic epithelial cell lines derived from the Immorto mouse [young adult mouse colon (YAMC)] and the Immorto-Min mouse [Immorto-Min colonic epithelial cell (IMCE)], which carries the Apc Min mutation, to study the effects of leptin-stimulated colon epithelial cells on angiogenesis. We utilized ex vivo rat mesenteric capillary bioassay and human umbilical vein endothelial cell (HUVEC) models to study angiogenesis. IMCE cells stimulated with leptin produced significantly more vascular endothelial growth factor (VEGF) than YAMC (268 +/- 18 versus 124 +/- 8 pg/ml; P < 0.01) cells. Leptin treatment induced dose-dependent increases in VEGF only in IMCE cells. Conditioned media from leptin (50 ng/ml)-treated IMCE cells induced significant capillary formation compared with control, which was blocked by the addition of a neutralizing antibody against VEGF. Conditioned media from leptin-treated IMCE cells also induced HUVEC cell proliferation, chemotaxis, upregulation of adhesion proteins and cell-signaling activation resulting in nuclear factor kappa B nuclear translocation and DNA binding due to VEGF. This is the first study demonstrating that leptin can induce preneoplastic colon epithelial cells to orchestrate VEGF-driven angiogenesis and vascular development, thus providing a specific mechanism and potential target for obesity-associated cancer.
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Affiliation(s)
- Janette M Birmingham
- Department of Food Science and Human Nutrition, College of Nursing, Michigan State University, East Lansing, MI 48824, USA
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Fenton JI, Birmingham JM, Hursting SD, Hord NG. Adiponectin blocks multiple signaling cascades associated with leptin-induced cell proliferation in Apc Min/+ colon epithelial cells. Int J Cancer 2008; 122:2437-45. [PMID: 18338750 DOI: 10.1002/ijc.23436] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We previously demonstrated that leptin, an adipose-derived hormone, induces cell proliferation in a model of preneoplastic (IMCE (Apc(Min/+)), but not normal (YAMC (Apc(+/+)), colon epithelial cells by inducing autocrine IL-6 production and trans-IL-6 signaling. Low serum adiponectin is associated with colon, prostate and breast cancer. Adiponectin is secreted by white adipose tissue; the levels of adiponectin in the blood decrease as body mass index (and leptin) increases. In our study, we tested whether murine recombinant globular adiponectin (gArcp30) could modulate leptin-induced cell proliferation, autocrine IL-6 production, trans-IL-6 signaling and other leptin-induced cell signaling events previously observed in IMCE cells but not YAMC cells. Under serum-free conditions, adiponectin (1 mug/ml) inhibited leptin-induced autocrine IL-6 production, soluble IL-6 receptor shedding, trans-IL-6 signaling and subsequent STAT3 phosphorylation in IMCE cells. Adiponectin inhibited leptin-induced cell proliferation in the IMCE cells and this inhibition was associated with I kappa B-alpha phosphorylation, I kappa B-alpha degradation and decreased NF-kappaB p65 DNA activation and binding. These data indicate that adiponectin acts on preneoplastic colon epithelial cells to regulate cell growth via 2 distinct pathways inhibiting leptin-induced NF-kappaB-dependent autocrine IL-6 production and trans-IL-6 signaling. We hypothesize that adiponectin may be an important regulator of colon epithelial cell homeostasis by linking the observed reduced risk for cancer in populations with high serum adiponectin concentrations to specific mechanisms of cell number homeostasis in a model of preneoplastic colon epithelial cells. These data may have broad implications for diet and lifestyle strategies for the prevention and treatment of obesity-associated cancers.
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Affiliation(s)
- Jenifer I Fenton
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, USA.
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Slaughter MR, Birmingham JM, Patel B, Whelan GA, Krebs-Brown AJ, Hockings PD, Osborne JA. Extended acclimatization is required to eliminate stress effects of periodic blood-sampling procedures on vasoactive hormones and blood volume in beagle dogs. Lab Anim 2002; 36:403-10. [PMID: 12396283 DOI: 10.1258/002367702320389062] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Important in all experimental animal studies is the need to control stress stimuli associated with environmental change and experimental procedures. As the stress response involves alterations in levels of vasoactive hormones, ensuing changes in cardiovascular parameters may confound experimental outcomes. Accordingly, we evaluated the duration required for dogs (n = 4) to acclimatized to frequent blood sampling that involved different procedures. On each sampling occasion during a 6-week period, dogs were removed from their pen to a laboratory area and blood was collected either by venepuncture (days 2, 15, 34, 41) for plasma renin activity (PRA), epinephrine (EPI), norepinephrine, aldosterone, insulin, and atrial natriuretic peptide, or by cannulation (dogs restrained in slings; days 1, 8, 14, 22, 30, 33, 37, 40) for determination of haematocrit (HCT) alone (days 1 to 22) or HCT with plasma volume (PV; days 30 to 40). PRA was higher on days 2 and 15 compared with days 34 and 41 and had decreased by up to 48% by the end of the study (day 41 vs day 15; mean/SEM: 1.18/0.27 vs 2.88/0.79 ng ANG I/ml/h, respectively). EPI showed a time-related decrease from days 2 to 34, during which mean values had decreased by 51% (mean/SEM: 279/29 vs 134/20.9 pg/ml for days 2 and 34, respectively), but appeared stable from then on. None of the other hormones showed any significant variability throughout the course of the study. HCT was relatively variable between days 1 to 22 but stabilized from day 30, after which all mean values were approximately 6% lower than those between days 1 and 8. We conclude that an acclimatization period of at least 4 weeks is required to eliminate stress-related effects in dogs associated with periodic blood sampling.
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Affiliation(s)
- M R Slaughter
- Safety Assessment, GlaxoSmithKline, Ware, Hertfordshire SG12 0DP, UK
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O'Brien PJ, Slaughter MR, Swain A, Birmingham JM, Greenhill RW, Elcock F, Bugelski PJ. Repeated acetaminophen dosing in rats: adaptation of hepatic antioxidant system. Hum Exp Toxicol 2000; 19:277-83. [PMID: 10918522 DOI: 10.1191/096032700678815918] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Repeated dosing of acetaminophen (paracetamol) to rats is reported to decrease their sensitivity to its hepatotoxic effects, which are associated with oxidative stress and glutathione depletion. We determined if repeated acetaminophen dosing produced adaptive response of key antioxidant system enzymes. Male rats (Sprague-Dawley, 10 weeks) were given 800, 1200, or 1600 mg/kg/day acetaminophen by oral gavage for 4 days. Liver was assayed for oxidative stress and antioxidant markers: malondialdehyde (MDA), thiobarbituric acid reactive substance (TBARS), total antioxidant status (TAS), glutathione (GSH), glutathione reductase (GR), glutathione peroxidase (GPx), glucose-6-phosphate dehydrogenase (G6PD), catalase (CAT), and superoxide dismutase (SOD), and alanine transaminase (ALT) as a marker of hepatocellular injury. Acetaminophen at 1200/1600 mg/kg decreased GSH 26/47%, GPx 21/26%, CAT 35/28%, SOD 21/12%; and TAS 28/18% (correlated with CAT, r=0.91; SOD, r=0.66; GPx, r=0.45). Despite antioxidant deficiencies, and no TBARS change, MDA decreased 26%/33%/37% at 800/1200/1600 mg/kg, which correlated with increased GR (61%/62%/76%, r=0.77) and G6PD (130%/110%/190%, r=0.78). Both MDA (r=0.68) and G6PD (r=0.71) correlated with hepatic ALT, which decreased 27%/43%/48%, respectively. Resistance to acetaminophen hepatotoxicity produced by repeated exposure is partially attributable to upregulation of hepatic G6PD and GR activity as an adaptive and protective response to oxidative stress and glutathione depletion.
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Affiliation(s)
- P J O'Brien
- Department of Safety Assessment, SmithKline Beecham Pharmaceuticals, Welwyn, Herts AL6 9AR, UK
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Affiliation(s)
- S C Jong
- Mycology and Botany Department, American Type Culture Collection, Rockville, Maryland 20852
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Affiliation(s)
- S C Jong
- Mycology and Botany Department, American Type Culture Collection, Rockville, Maryland 20852
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Affiliation(s)
- S C Jong
- American Type Culture Collection, Rockville, Maryland 20852
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Birmingham JM. A method for pasteurising human milk. Nurs Times 1978; 74:Suppl 5-6. [PMID: 251987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Birmingham JM. Cardiac arrest equipment-at CSSD service. Nurs Times 1977; 73:1869-71. [PMID: 593924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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