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Koutsogiannaki S, Hou L, Babazada H, Okuno T, Blazon-Brown N, Soriano SG, Yokomizo T, Yuki K. The volatile anesthetic sevoflurane reduces neutrophil apoptosis via Fas death domain-Fas-associated death domain interaction. FASEB J 2019; 33:12668-12679. [PMID: 31513427 DOI: 10.1096/fj.201901360r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sepsis remains a significant health care burden, with high morbidities and mortalities. Patients with sepsis often require general anesthesia for procedures and imaging studies. Knowing that anesthetic drugs can pose immunomodulatory effects, it would be critical to understand the impact of anesthetics on sepsis pathophysiology. The volatile anesthetic sevoflurane is a common general anesthetic derived from ether as a prototype. Using a murine sepsis model induced by cecal ligation and puncture surgery, we examined the impact of sevoflurane on sepsis outcome. Different from volatile anesthetic isoflurane, sevoflurane exposure significantly improved the outcome of septic mice. This was associated with less apoptosis in the spleen. Because splenic apoptosis was largely attributed to the apoptosis of neutrophils, we examined the effect of sevoflurane on FasL-induced neutrophil apoptosis. Sevoflurane exposure significantly attenuated apoptosis. Sevoflurane did not affect the binding of FasL to the extracellular domain of Fas receptor. Instead, in silico analysis suggested that sevoflurane would bind to the interphase between Fas death domain (DD) and Fas-associated DD (FADD). The effect of sevoflurane on Fas DD-FADD interaction was examined using fluorescence resonance energy transfer (FRET). Sevoflurane attenuated FRET efficiency, indicating that sevoflurane hindered the interaction between Fas DD and FADD. The predicted sevoflurane binding site is known to play a significant role in Fas DD-FADD interaction, supporting our in vitro and in vivo apoptosis results.-Koutsogiannaki, S., Hou, L., Babazada, H., Okuno, T., Blazon-Brown, N., Soriano, S. G., Yokomizo, T., Yuki, K. The volatile anesthetic sevoflurane reduces neutrophil apoptosis via Fas death domain-Fas-associated death domain interaction.
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Affiliation(s)
- Sophia Koutsogiannaki
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Lifei Hou
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Hasan Babazada
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Toshiaki Okuno
- Department of Biochemistry, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Nathan Blazon-Brown
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Sulpicio G Soriano
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
| | - Takehiko Yokomizo
- Department of Biochemistry, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Koichi Yuki
- Cardiac Anesthesia Division, Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Anaesthesia, Harvard Medical School, Boston, Massachusetts, USA
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Gruver-Yates AL, Quinn MA, Cidlowski JA. Analysis of glucocorticoid receptors and their apoptotic response to dexamethasone in male murine B cells during development. Endocrinology 2014; 155:463-74. [PMID: 24196358 PMCID: PMC3891935 DOI: 10.1210/en.2013-1473] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Glucocorticoids have an important role in the resolution of inflammation and clinically they are routinely used to treat allergies, asthma, sepsis, and autoimmune diseases. In addition, glucocorticoids are well recognized to negatively impact the development and function of T cells in the immune system by inducing apoptosis. Less is known however about glucocorticoid function in B lymphocytes. Herein, we demonstrate that the glucocorticoid receptor (GR) is present in B-cell populations isolated from both the spleen and the bone marrow. B-cell populations were found to express more GR than non-B-cell populations from both the spleen and the bone marrow. GR protein was found in all B-cell (B220+) developmental subsets (Mature IgM+IgD+, Immature IgM+IgD-, and Pro/Pre IgM-IgD-) isolated from spleen. GR staining intensity was varied among the B-cell developmental subsets and was found to be higher in B cells isolated from the spleen (secondary lymphoid organ) versus the bone marrow (primary lymphoid organ). Ex vivo cell culture of murine splenocytes and bone marrow lymphocytes indicated that dexamethasone stimulated apoptosis in all B-cell developmental subsets demonstrating glucocorticoid responsiveness. Furthermore, in vivo administration of dexamethasone to adrenalectomized mice reduced B-cell numbers in both spleen and bone marrow. These data suggest that glucocorticoid signaling has an important understudied role in B-cell life-or-death decisions.
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Affiliation(s)
- Amanda L Gruver-Yates
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina 27709
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Dart DA, Waxman J, Aboagye EO, Bevan CL. Visualising androgen receptor activity in male and female mice. PLoS One 2013; 8:e71694. [PMID: 23940781 PMCID: PMC3737126 DOI: 10.1371/journal.pone.0071694] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 07/08/2013] [Indexed: 11/19/2022] Open
Abstract
Androgens, required for normal development and fertility of males and females, have vital roles in the reproductive tract, brain, cardiovascular system, smooth muscle and bone. Androgens function via the androgen receptor (AR), a ligand-dependent transcription factor. To assay and localise AR activity in vivo we generated the transgenic “ARE-Luc” mouse, expressing a luciferase reporter gene under the control of activated endogenous AR. In vivo imaging of androgen-mediated luciferase activity revealed several strongly expressing tissues in the male mouse as expected and also in certain female tissues. In males the testes, prostate, seminal vesicles and bone marrow all showed high AR activity. In females, strong activity was seen in the ovaries, uterus, omentum tissue and mammary glands. In both sexes AR expression and activity was also found in salivary glands, the eye (and associated glands), adipose tissue, spleen and, notably, regions of the brain. Luciferase protein expression was found in the same cell layers as androgen receptor expression. Additionally, mouse AR expression and activity correlated well with AR expression in human tissues. The anti-androgen bicalutamide reduced luciferase signal in all tissues. Our model demonstrates that androgens can act in these tissues directly via AR, rather than exclusively via androgen aromatisation to estrogens and activation of the estrogen receptor. Additionally, it visually demonstrates the fundamental importance of AR signalling outside the normal role in the reproductive organs. This model represents an important tool for physiological and developmental analysis of androgen signalling, and for characterization of known and novel androgenic or antiandrogenic compounds.
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Affiliation(s)
- D. Alwyn Dart
- Department of Surgery & Cancer, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
| | - Jonathan Waxman
- Department of Surgery & Cancer, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
| | - Eric O. Aboagye
- Department of Surgery & Cancer, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
| | - Charlotte L. Bevan
- Department of Surgery & Cancer, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
- * E-mail:
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Gambini E, Pesce M, Persico L, Bassetti B, Gambini A, Alamanni F, Agrifoglio M, Capogrossi MC, Pompilio G. Patient profile modulates cardiac c-kit(+) progenitor cell availability and amplification potential. Transl Res 2012; 160:363-73. [PMID: 22749776 DOI: 10.1016/j.trsl.2012.05.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 05/02/2012] [Accepted: 05/31/2012] [Indexed: 01/11/2023]
Abstract
Human c-kit(+) cardiac progenitor cells (CPCs) are multipotent and may be used for cardiac repair. The effect of cardiovascular risk factors and medications on CPCs isolation efficiency, c-kit stem cell marker expression, and ex vivo proliferative potential is unknown and was examined in the present work. Cells from human right atrial appendages (n = 50) were expanded in culture; after ∼16 days (T0), it was established the percentage of CPCs and c-kit protein mean fluorescence intensity (MFI) by fluorescence activated cell sorting (FACS). Thereafter, CPCs were isolated by high throughput sorting; after culturing for 4 passages CPCs-derived cells were re-analyzed to assess c-kit(+) cell percentage and enrichment vs T0. The association between 19 demographic and clinical variables to CPCs number and MFI at T0, and CPCs enrichment at P4, was determined by multiple linear regression analysis with stepwise selection procedure. The results revealed that (1) at T0, the number of isolated CPCs directly correlated to β-blocker treatment; (2) at T0, c-kit protein expression directly correlated to pulmonary hypertension (PH); (3) at P4, CPC's enrichment inversely correlated to smoke, atrial fibrillation (AF), a history of myocardial infarction, whereas it directly correlated to PH and statins. Patient clinical profile and medications differently modulate CPCs isolation and amplification potential ex vivo. These results may provide new insights for the understanding of cardiac homeostasis and suggest both limitations and possible enhancing strategies for the therapeutic use of cardiac-resident progenitor cells.
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Affiliation(s)
- Elisa Gambini
- Laboratorio di Biologia Vascolare e Medicina Rigenerativa, Centro Cardiologico Monzino-IRCCS, Milan, Italy.
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End-point effector stress mediators in neuroimmune interactions: their role in immune system homeostasis and autoimmune pathology. Immunol Res 2012; 52:64-80. [PMID: 22396175 DOI: 10.1007/s12026-012-8275-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Much evidence has identified a direct anatomical and functional link between the brain and the immune system, with glucocorticoids (GCs), catecholamines (CAs), and neuropeptide Y (NPY) as its end-point mediators. This suggests the important role of these mediators in immune system homeostasis and the pathogenesis of inflammatory autoimmune diseases. However, although it is clear that these mediators can modulate lymphocyte maturation and the activity of distinct immune cell types, their putative role in the pathogenesis of autoimmune disease is not yet completely understood. We have contributed to this field by discovering the influence of CAs and GCs on fine-tuning thymocyte negative selection and, in particular, by pointing to the putative CA-mediated mechanisms underlying this influence. Furthermore, we have shown that CAs are implicated in the regulation of regulatory T-cell development in the thymus. Moreover, our investigations related to macrophage biology emphasize the complex interaction between GCs, CAs and NPY in the modulation of macrophage functions and their putative significance for the pathogenesis of autoimmune inflammatory diseases.
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Abstract
Sex differences in the biology of different organ systems and the influence of sex hormones in modulating health and disease are increasingly relevant in clinical and research areas. Although work has focused on sex differences and sex hormones in cardiovascular, musculoskeletal, and neuronal systems, there is now increasing clinical evidence for sex differences in incidence, morbidity, and mortality of lung diseases including allergic diseases (such as asthma), chronic obstructive pulmonary disease, pulmonary fibrosis, lung cancer, as well as pulmonary hypertension. Whether such differences are inherent and/or whether sex steroids play a role in modulating these differences is currently under investigation. The purpose of this review is to define sex differences in lung structure/function under normal and specific disease states, with exploration of whether and how sex hormone signaling mechanisms may explain these clinical observations. Focusing on adult age groups, the review addresses the following: 1) inherent sex differences in lung anatomy and physiology; 2) the importance of certain time points in life such as puberty, pregnancy, menopause, and aging; 3) expression and signaling of sex steroid receptors under normal vs. disease states; 4) potential interplay between different sex steroids; 5) the question of whether sex steroids are beneficial or detrimental to the lung; and 6) the potential use of sex steroid signaling as biomarkers and therapeutic avenues in lung diseases. The importance of focusing on sex differences and sex steroids in the lung lies in the increasing incidence of lung diseases in women and the need to address lung diseases across the life span.
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Affiliation(s)
- Elizabeth A Townsend
- Department of Physiology and Biomedical Engineering, College of Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA.
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Tammali R, Reddy ABM, Saxena A, Rychahou PG, Evers BM, Qiu S, Awasthi S, Ramana KV, Srivastava SK. Inhibition of aldose reductase prevents colon cancer metastasis. Carcinogenesis 2011; 32:1259-67. [PMID: 21642355 DOI: 10.1093/carcin/bgr102] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Colon cancer is the third most common cause of cancer and is the second leading cause of cancer deaths in the USA. Although inhibition of aldose reductase (AR) is known to prevent human colon cancer cell growth in nude mice xenografts, the role of AR in the regulation of cancer metastasis is not known. We now demonstrate the mechanisms by which AR regulates colon cancer metastasis in vitro and in vivo. Inhibition of AR prevented the epidermal growth factor (EGF) or fibroblast growth factor (FGF)-induced migration and invasion of human colon cancer (HT29; KM20) cells by >70% and also inhibited (>80%) the adhesion of the cancer cells to endothelial cells. Treatment of endothelial cells with AR inhibitors significantly (∼85%) downregulated the EGF or FGF-induced expression of Inter-Cellular Adhesion Molecule-1, Vascular cell adhesion molecule-1 and vascular endothelial-cadherin. Furthermore, liver metastasis of green fluorescent protein-labeled KM20 cells injected into the spleen of athymic nude mice was significantly (>65%) prevented by AR inhibitor, fidarestat or ARsiRNA delivered systemically into the mice. Similar results were observed with HT29 cells. AR inhibition or ablation also prevented (70-90%) the increase in the levels of matrix metalloproteinase-2, cyclin D1, CD31, CD34 and the activation of nuclear factor-kappa-binding protein in metastatic liver. Thus, our results indicate that AR regulates cancer cell adhesion, invasion and migration events which initiate metastasis and therefore, AR inhibition could be a novel therapeutic approach for the prevention of colon cancer metastasis.
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Affiliation(s)
- Ravinder Tammali
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch,Galveston, TX 77555, USA
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Effect of altrenogest-treatment of mares in late gestation on adrenocortical function, blood count and plasma electrolytes in their foals. Equine Vet J 2010; 41:572-7. [DOI: 10.2746/042516409x394481] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Flow cytometry as a tool for measurement of steroid hormone receptor protein expression in leukocytes. Methods Mol Biol 2009. [PMID: 19117138 DOI: 10.1007/978-1-60327-575-0_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Measurement of protein expression in live, intact cells using flow cytometry (FC) has been employed for several decades in the areas of immunology, cell biology, and molecular biology. More recently, this technique has found appreciation in applied scientific fields, including cancer biology and endocrinology, to serve as a tool for identifying cells more likely to respond to specific treatments. FC, also referred to as fluorescence-activated cell sorting (FACS), is an antibody-based method that provides the user with an ability to identify proteins expressed on surfaces of cells as well as in the cytoplasm, including steroid hormone receptors. This technique is most useful for examining specific cell types in a heterogeneous population and therefore can be used to identify cells more likely to respond to treatments based on expression of the appropriate receptor. Isolation of purified subpopulations for further manipulation and investigation of functional capacity is also possible using a cell sorter, which uses similar technology to isolate cells for use by the researcher. This is especially important for studying responses of less abundant cell populations in tissues that express high levels of a target protein or receptor of interest. Furthermore, FACS analysis is clinically useful to identify and isolate responsive cell populations, which may be less appreciable in whole tissues because of the diluting effects of surrounding, nonresponding cell types. Immune cells are commonly utilized as a source of cell populations in the FC technique and have previously been shown to express steroid hormone receptors and respond to steroid hormone treatment. Here, we demonstrate that FC is a useful tool for identifying immune cells expressing steroid hormone receptor protein. This method can also be easily expanded to include other, nonimmune cell populations to address specific research questions related to steroid hormone receptor biology.
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