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Fritz B, Kleinhenz M, Montgomery S, Magnin G, Martin M, Weeder M, Curtis A, Coetzee J. Determination of milk concentrations and pharmacokinetics of salicylic acid following acetylsalicylic acid (aspirin) administration in postpartum dairy cows. J Dairy Sci 2022; 105:9869-9881. [DOI: 10.3168/jds.2021-21507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 07/20/2022] [Indexed: 11/17/2022]
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Flunixin Meglumine Reduces Milk Isoprostane Concentrations in Holstein Dairy Cattle Suffering from Acute Coliform Mastitis. Antioxidants (Basel) 2021; 10:antiox10060834. [PMID: 34073753 PMCID: PMC8225098 DOI: 10.3390/antiox10060834] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 11/16/2022] Open
Abstract
Dysfunctional inflammation contributes significantly to the pathogenesis of coliform mastitis and the classical pro-inflammatory enzyme cyclooxygenase-2 (COX-2) is the target of medical intervention using the non-steroidal anti-inflammatory drug (NSAID) flunixin meglumine (FM). Inhibition of COX-2 by FM can decrease concentrations of pro-inflammatory fatty acid-based mediators called eicosanoids, providing antipyretic and analgesic effects in dairy cows suffering from coliform mastitis. However, approximately 50% of naturally occurring coliform mastitis with systemic involvement results in death of the animal, even with NSAID treatment. Inadequate antioxidant potential (AOP) to neutralize reactive oxygen species (ROS) produced during excessive inflammation allows for oxidative stress (OS), contributing to tissue damage during coliform mastitis. Biomarkers of lipid peroxidation by ROS, called isoprostanes (IsoP), were used in humans and cattle to quantify the extent of OS. Blood IsoP were shown to be elevated and correlate with oxidant status during acute coliform mastitis. However, the effect of FM treatment on oxidant status and markers of OS has not been established. Blood IsoP concentrations were used to quantify systemic OS, whereas milk was used to assess local OS in the mammary gland. Results indicate that FM treatment had no effect on blood markers of inflammation but reduced the oxidant status index (OSi) by increasing blood AOP from pre- to post-FM treatment. Milk AOP significantly increased from pre- to post-FM treatment, whereas ROS decreased, resulting in a decreased OSi from pre- to post-FM treatment. The only blood IsoP concentration that was significantly different was 5-iso-iPF2α-VI, with a decreased concentration from pre- to post-FM treatment. Conversely, milk 5-iso-iPF2α-VI, 8,12-iso-iPF2α-VI, and total IsoP concentrations were decreased following FM treatment. These results indicated that administration of FM did improve systemic and local oxidant status and reduced local markers of OS. However, differential effects were observed between those animals that survived the infection and those that died, indicating that pre-existing inflammation and oxidant status greatly affect efficacy of FM and may be the key to reducing severity and mortality associated with acute coliform infections. Supplementation to improve AOP and anti-inflammatory mediator production may significantly improve efficacy of FM treatment.
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Turner N, Abeysinghe P, Sadowski P, Mitchell MD. Exosomal Cargo May Hold the Key to Improving Reproductive Outcomes in Dairy Cows. Int J Mol Sci 2021; 22:ijms22042024. [PMID: 33670752 PMCID: PMC7922264 DOI: 10.3390/ijms22042024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/15/2021] [Accepted: 02/15/2021] [Indexed: 12/25/2022] Open
Abstract
The reproductive status of dairy cows remains a challenge for dairy farmers worldwide, with impaired fertility linked to a significant reduction in herd profitability, due in part to impaired immunity, increased metabolic pressure, and longer postpartum anestrous interval (PPAI). Exosomes are nanovesicles released from a variety of cell types and end up in circulation, and carry proteins, bioactive peptides, lipids, and nucleic acids specific to the place of origin. As such, their role in health and disease has been investigated in humans and animals. This review discusses research into exosomes in the context of reproduction in dairy herds and introduces recent advances in mass-spectrometry (MS) based proteomics that have a potential to advance quantitative profiling of exosomal protein cargo in a search for early biomarkers of cattle fertility.
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Affiliation(s)
- Natalie Turner
- Institute of Health and Biomedical Innovation—Centre for Children’s Health Research, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD 4029, Australia; (N.T.); (P.A.)
| | - Pevindu Abeysinghe
- Institute of Health and Biomedical Innovation—Centre for Children’s Health Research, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD 4029, Australia; (N.T.); (P.A.)
| | - Pawel Sadowski
- Central Analytical Research Facility—Queensland University of Technology, Gardens Point, Brisbane, QLD 4000, Australia;
| | - Murray D. Mitchell
- Institute of Health and Biomedical Innovation—Centre for Children’s Health Research, School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD 4029, Australia; (N.T.); (P.A.)
- Correspondence: ; Tel.: +61-7-3069-7438
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Myers MJ, Deaver CM. Identification of swine protein biomarkers of inflammation-associated pain. Res Vet Sci 2018; 122:186-188. [PMID: 30529274 DOI: 10.1016/j.rvsc.2018.11.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/29/2018] [Accepted: 11/30/2018] [Indexed: 11/15/2022]
Abstract
This study sought to determine if proteins associated with pain in humans could be measured using a swine in vitro model of inflammation. This would constitute the first step towards using them as surrogate endpoints to help support effectiveness indications for investigational new animal drugs to control pain in swine. Swine whole blood samples were cultured in vitro with E. coli derived-lipopolysaccharide (LPS) or without LPS for 24 h. Supernatants from these cultures were collected to determine the concentration of proteins associated with pain and whether the levels were altered in response to LPS-induced inflammation. Bradykinin protein levels steadily increased over time due to LPS stimulation and returned to 0 h levels after 6 h of culture. Corticotrophin-releasing factor protein levels were not affected by LPS. Substance-P protein trended towards increasing concentrations after LPS stimulation, following a time-concentration profile similar to that observed with bradykinin. These results suggest that 2 biomarkers may be useful as surrogate endpoints for evaluation of pain.
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Affiliation(s)
- Michael J Myers
- Center for Veterinary Medicine, Office of Research, Division of Applied Veterinary Research, 8401 Muirkirk Road, Laurel, MD 20708, United States.
| | - Christine M Deaver
- Center for Veterinary Medicine, Office of Research, Division of Applied Veterinary Research, 8401 Muirkirk Road, Laurel, MD 20708, United States
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Kleinhenz MD, Van Engen NK, Gorden PJ, Kleinhenz KE, Kukanich B, Rajewski SM, Walsh P, Coetzee JF. The impact of pain on the pharmacokinetics of transdermal flunixin meglumine administered at the time of cautery dehorning in Holstein calves. Vet Anaesth Analg 2018; 45:849-857. [PMID: 30122634 DOI: 10.1016/j.vaa.2018.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/28/2018] [Accepted: 06/28/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVE To study the influence of pain on the pharmacokinetics and anti-inflammatory actions of transdermal flunixin administered at dehorning. STUDY DESIGN Prospective, crossover, clinical study. ANIMALS A total of 16 male Holstein calves, aged 6-8 weeks weighing 61.3 ± 6.6 kg. METHODS Calves were randomly assigned to one of two treatments: transdermal flunixin and dehorning (PAIN) or transdermal flunixin and sham dehorning (NO PAIN). Flunixin meglumine (3.33 mg kg-1) was administered topically as a pour-on concurrently with hot iron dehorning or sham dehorning. The calves were subjected to the alternative treatment 14 days later. Blood samples were collected at predetermined time points up to 72 hours for measurement of plasma flunixin concentrations. Pharmacokinetics parameters were determined using noncompartmental analysis. Prostaglandin E2 (PGE2) concentration was determined using a commercial enzyme-linked immunosorbent assay. The 80% inhibition concentration (IC80) of PGE2 was determined using nonlinear regression. Pharmacokinetic data were statistically analyzed using paired t tests and Wilcoxon rank sums for nonparametric data. Flunixin and PGE2 concentrations were log transformed and analyzed using repeated measures. RESULTS A total of 15 calves completed the study. Plasma half-life of flunixin was significantly longer in PAIN (10.09 hours) than NO PAIN (7.16 hours) (p = 0.0202). Bioavailability of transdermal flunixin was 30% and 37% in PAIN and NO PAIN, respectively (p = 0.097). Maximum plasma concentrations of flunixin were 0.95 and 1.16 μg mL-1 in PAIN and NO PAIN, respectively (p = 0.089). However, there was a treatment (PAIN versus NO PAIN) by time interaction (p = 0.0353). PGE2 concentrations were significantly lower in the PAIN treatment at 48 and 72 hours (p = 0.0092 and p = 0.0287, respectively). The IC80 of PGE2 by flunixin was similar in both treatments (p = 0.88). CONCLUSION AND CLINICAL RELEVANCE Pain alters the pharmacokinetics and anti-inflammatory effects of transdermally administered flunixin.
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Affiliation(s)
- Michael D Kleinhenz
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA
| | - Nicholas K Van Engen
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA
| | - Patrick J Gorden
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA
| | - Katie E Kleinhenz
- Department of Animal Science, College of Agriculture and Life Sciences, Iowa State University, Ames, IA, USA
| | - Butch Kukanich
- Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Suzanne M Rajewski
- Pharmacology Analytical Support Team (PhAST), College of Veterinary Medicine, Iowa State University, Ames, IA, USA
| | - Philip Walsh
- Orchard Veterinary Centre, Armagh, Co. Armagh, UK
| | - Johann F Coetzee
- Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, USA; Pharmacology Analytical Support Team (PhAST), College of Veterinary Medicine, Iowa State University, Ames, IA, USA.
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Rodrigues MC, Cooke RF, Marques RS, Arispe SA, Keisler DH, Bohnert DW. Effects of oral meloxicam administration to beef cattle receiving lipopolysaccharide administration or vaccination against respiratory pathogens. J Anim Sci 2016; 93:5018-27. [PMID: 26523594 DOI: 10.2527/jas.2015-9424] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
This study evaluated the effects of oral meloxicam administration on metabolic, inflammatory, and acute-phase responses of beef cattle receiving a lipopolysaccharide (LPS) challenge (Exp. 1; d -1 to 6) or vaccinated against respiratory pathogens (Exp. 2; d 7 to 21). Twenty-one Angus steers ( = 11) and heifers ( = 10) were housed in individual pens on d -15 and were offered free-choice water, mineral-vitamin mix, and hay until d 21. In Exp. 1, cattle were ranked on d -1 by sex and BW and assigned to 1) oral meloxicam administration (1 mg/kg BW daily) from day -1 to 6 (MEL8), 2) oral meloxicam administration (1 mg/kg BW) on d 0 and oral lactose monohydrate administration (1 mg/kg BW) on d -1 and from d 1 to 6 (MEL1), or 3) oral lactose monohydrate administration (1 mg/kg BW daily) from d -1 to 6 (CON). On d 0, cattle received an intravenous LPS bolus (0.5 μg/kg BW) concurrently with treatment administration. Rectal temperature (RTEMP) was assessed, and blood samples were collected at -2, 0, 2, 4, 6, 8, 12, 16, 24, 36, 48, 60, 72, 96, 120, and 144 h relative to LPS administration. No treatment effects were detected ( ≥ 0.36) for RTEMP, concentrations of serum tumor necrosis factor α (TNFα), plasma haptoglobin, cortisol, insulin, and leptin, as well as blood mRNA expression of α and cyclooxygenase-2, although all variables increased ( < 0.01) across treatments after LPS administration. In Exp. 2, cattle received the same treatments that they were assigned to in Exp. 1 from d 7 to d 13 and were vaccinated against respiratory pathogens concurrently with treatment administration on d 8. Blood samples were collected, and RTEMP was assessed as in Exp. 1 in addition to 168, 240, and 336 h relative to vaccination. No treatment effects were detected ( ≥ 0.26) for RTEMP, the same plasma and serum variables evaluated in Exp. 1, and serum concentrations of antibodies against or serum titers against bovine respiratory syncytial virus, bovine herpesvirus-1, bovine viral diarrhea virus-1, and parainfluenza-3 virus. All variables increased ( < 0.01) across treatments after vaccination, except for serum TNFα and titers against bovine viral diarrhea virus-1 ( ≥ 0.40). Collectively, this study found no evidence that oral meloxicam administration, at the doses and intervals utilized herein, mitigated the metabolic, inflammatory, and acute-phase reactions elicited by LPS administration or vaccination against respiratory pathogens.
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Allen KA, Coetzee JF, Edwards-Callaway LN, Glynn H, Dockweiler J, KuKanich B, Lin H, Wang C, Fraccaro E, Jones M, Bergamasco L. The effect of timing of oral meloxicam administration on physiological responses in calves after cautery dehorning with local anesthesia. J Dairy Sci 2013; 96:5194-205. [PMID: 23746590 DOI: 10.3168/jds.2012-6251] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 04/17/2013] [Indexed: 11/19/2022]
Abstract
Dehorning is a painful husbandry procedure that is commonly performed in dairy calves. Parenteral meloxicam combined with local anesthesia mitigates the physiological and behavioral effects of dehorning in calves. The purpose of this study was to determine the influence of timing of oral meloxicam administration on physiological responses in calves after dehorning. Thirty Holstein bull calves, 8 to 10 wk of age (28-70 kg), were randomly assigned to 1 of 3 treatment groups: placebo-treated control group (n=10), calves receiving meloxicam administered orally (1 mg/kg) in powdered milk replacer 12h before cautery dehorning (MEL-PRE; n=10), and calves receiving meloxicam administered as an oral bolus (1 mg/kg) at the time of dehorning (MEL-POST; n=10). Following cautery dehorning, blood samples were collected to measure cortisol, substance P (SP), haptoglobin, ex vivo prostaglandin E2 (PgE2) production after lipopolysaccharide stimulation and meloxicam concentrations. Maximum ocular temperature and mechanical nociceptive threshold (MNT) were also assessed. Data were analyzed using noncompartmental pharmacokinetic analysis and repeated measures ANOVA models. Mean peak meloxicam concentrations were 3.61±0 0.21 and 3.27±0.14 μg/mL with average elimination half-lives of 38.62±5.87 and 35.81±6.26 h for MEL-PRE and MEL-POST, respectively. Serum cortisol concentrations were lower in meloxicam-treated calves compared with control calves at 4 h postdehorning. Substance P concentrations were significantly higher in control calves compared with meloxicam-treated calves at 120 h after dehorning. Prostaglandin E2 concentrations were lower in meloxicam-treated calves compared with control calves. Mechanical nociceptive threshold was higher in control calves at 1h after dehorning, but meloxicam-treated calves tended to have a higher MNT at 6h after dehorning. No effect of timing of meloxicam administration on serum cortisol concentrations, SP concentrations, haptoglobin concentrations, maximum ocular temperature, or MNT was observed. However, PgE2 concentrations in MEL-PRE calves were similar to control calves after 12h postdehorning, whereas MEL-POST calves had lower PgE2 concentrations for 3 d postdehorning. These findings support that meloxicam reduced cortisol, SP, and PgE2 after dehorning, but only PgE2 production was significantly affected by the timing of meloxicam administration.
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Affiliation(s)
- K A Allen
- Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506, USA
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Miciletta M, Cuniberti B, Barbero R, Re G. In vitro
enantioselective pharmacodynamics of Carprofen and Flunixin-meglumine in feedlot cattle. J Vet Pharmacol Ther 2013; 37:43-52. [DOI: 10.1111/jvp.12052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 03/09/2013] [Indexed: 01/12/2023]
Affiliation(s)
- M. Miciletta
- Division of Pharmacology and Toxicology; Department of Animal Pathology; University of Torino; Grugliasco Torino Italy
- Pfizer Animal Health Italia; Roma Italy
| | - B. Cuniberti
- Division of Pharmacology and Toxicology; Department of Animal Pathology; University of Torino; Grugliasco Torino Italy
| | - R. Barbero
- Division of Pharmacology and Toxicology; Department of Animal Pathology; University of Torino; Grugliasco Torino Italy
| | - G. Re
- Division of Pharmacology and Toxicology; Department of Animal Pathology; University of Torino; Grugliasco Torino Italy
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Fujita Y, Hara Y, Nezu Y, Orima H, Tagawa M. Biomarkers in dogs surgically treated for ruptured cranial cruciate ligaments. Vet Rec 2012; 171:426. [DOI: 10.1136/vr.100801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Y. Fujita
- Laboratory of Surgery II; Department of Veterinary Medicine; School of Veterinary Medicine; Azabu University; 1-17-71 Fuchinobe, Chuo-ku, Sagamihara-shi Kanagawa 2525201 Japan
| | - Y. Hara
- Laboratory of Surgery II; Department of Veterinary Medicine; School of Veterinary Medicine; Azabu University; 1-17-71 Fuchinobe, Chuo-ku, Sagamihara-shi Kanagawa 2525201 Japan
| | - Y. Nezu
- Laboratory of Surgery II; Department of Veterinary Medicine; School of Veterinary Medicine; Azabu University; 1-17-71 Fuchinobe, Chuo-ku, Sagamihara-shi Kanagawa 2525201 Japan
| | - H. Orima
- Division of Veterinary Surgery; Department of Veterinary Science; Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 1808602 Japan
| | - M. Tagawa
- Division of Veterinary Radiology; Department of Veterinary Science; Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 1808602 Japan
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Donalisio C, Barbero R, Cuniberti B, Vercelli C, Casalone M, Re G. Effects of flunixin meglumine and ketoprofen on mediator production in ex vivo and in vitro models of inflammation in healthy dairy cows. J Vet Pharmacol Ther 2012; 36:130-9. [PMID: 22724509 DOI: 10.1111/j.1365-2885.2012.01396.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, ex vivo assays were carried out in dairy cows to evaluate the anti-inflammatory effects of two nonsteroidal anti-inflammatory drugs: ketoprofen (KETO) and flunixin meglumine (FM). Twelve healthy Holstein dairy cattle were randomly allocated to two groups (n=6): group 1 received FM and group 2 received KETO at recommended therapeutic dosages. The anti-inflammatory effects of both drugs were determined by measuring the production of coagulation-induced thromboxane B2 (TXB2 ), lipopolysaccharides (LPS) (10 μg/mL)-induced prostaglandin E2 (PGE2 ), and calcium ionophore (60 μm)-induced leukotrien B4 (LTB4 ). Cytokine production was assessed by measuring tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ) and interleukin-8 (CXCL8) concentrations after incubation in the presence of 10 μg/mL LPS. The IC50 of FM and KETO was determined in vitro by determining the concentration of TXB2 and PGE2 in the presence of scalar drug concentrations (10(-9) -10(-3) m). Both FM and KETO inhibited the two COX isoforms in vitro, but showed a preference for COX-1. FM and KETO showed similar anti-inflammatory effects in the cow.
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Affiliation(s)
- C Donalisio
- Division of Pharmacology and Toxicology, Department of Animal Pathology, University of Torino, Torino, Italy.
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11
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Lewis KM, Harford-Wright E, Vink R, Ghabriel MN. Targeting classical but not neurogenic inflammation reduces peritumoral oedema in secondary brain tumours. J Neuroimmunol 2012; 250:59-65. [PMID: 22722013 DOI: 10.1016/j.jneuroim.2012.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/03/2012] [Accepted: 06/04/2012] [Indexed: 01/26/2023]
Abstract
Dexamethasone, the standard treatment for peritumoral brain oedema, inhibits classical inflammation. Neurogenic inflammation, which acts via substance P (SP), has been implicated in vasogenic oedema in animal models of CNS injury. SP is elevated within and outside CNS tumours. This study investigated the efficacy of NK1 receptor antagonists, which block SP, compared with dexamethasone treatment, in a rat model of tumorigenesis. Dexamethasone reverted normal brain water content and reduced Evans blue and albumin extravasation, while NK1 antagonists did not ameliorate oedema formation. We conclude that classical inflammation rather than neurogenic inflammation drives peritumoral oedema in this brain tumour model.
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Affiliation(s)
- Kate M Lewis
- Adelaide Centre for Neuroscience Research, School of Medical Sciences, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Benedictus L, Jorritsma R, Knijn H, Vos P, Koets A. Chemotactic activity of cotyledons for mononuclear leukocytes related to occurrence of retained placenta in dexamethasone induced parturition in cattle. Theriogenology 2011; 76:802-9. [DOI: 10.1016/j.theriogenology.2011.03.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 03/18/2011] [Accepted: 03/24/2011] [Indexed: 11/16/2022]
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Lopparelli RM, Giantin M, Pozza G, Stefani AL, Ravarotto L, Montesissa C, Dacasto M. Target gene expression signatures in neutrophils and lymphocytes from cattle administered with dexamethasone at growth promoting purposes. Res Vet Sci 2011; 93:226-33. [PMID: 21807391 DOI: 10.1016/j.rvsc.2011.07.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 06/22/2011] [Accepted: 07/09/2011] [Indexed: 01/13/2023]
Abstract
The glucocorticoid dexamethasone (DEX), when used as a growth promoter, cause morphological and functional alterations in cattle lymphoid organs and cells. In the present experiment, the transcriptional effects of an illicit DEX protocol upon six target genes were investigated in cattle neutrophils (NEU) and lymphocytes (LFC). Blood samples were taken before (T(0)) and 2, 3, 10, 19, 31 and 43 days from the beginning of DEX administration (T(1)-T(6)). Leukocytes were counted and cells isolated by gradient centrifugation; then, glutathione peroxidase 1 and 3 (GPX1 and GPX3), glucocorticoid receptor alpha (GRα), l-selectin, nuclear factor κB, subunit p65 (NFκB) and tumor necrosis factor alpha (TNFα) mRNA amounts were measured through a quantitative Real Time RT-PCR approach. A significant change vs controls in NEU/LFC ratio was noticed from T(3) forward. Compared to T(0), DEX significantly increased to a variable extent all candidate gene mRNAs abundances in NEU; in contrast, only l-selectin, GRα and GPX1 were significantly up-regulated in LFC. Present results suggest that illicit DEX affects transcription in cattle immune cells, that might be considered as a promising surrogate tissue for the screening of DEX abuse in cattle farming.
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Affiliation(s)
- R M Lopparelli
- Dipartimento di Sanità pubblica, Patologia comparata ed Igiene veterinaria, viale dell'Università 16, I-35020 Agripolis Legnaro (Padova), Italy
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Lüttgenau J, Beindorff N, Ulbrich S, Kastelic J, Bollwein H. Low plasma progesterone concentrations are accompanied by reduced luteal blood flow and increased size of the dominant follicle in dairy cows. Theriogenology 2011; 76:12-22. [DOI: 10.1016/j.theriogenology.2010.12.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 11/29/2010] [Accepted: 12/26/2010] [Indexed: 10/18/2022]
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15
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In vitro identification and verification of inflammatory biomarkers in swine. Vet Immunol Immunopathol 2010; 139:67-72. [PMID: 20828834 DOI: 10.1016/j.vetimm.2010.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 07/30/2010] [Accepted: 08/02/2010] [Indexed: 12/30/2022]
Abstract
Currently there are no non-steroidal anti-inflammatory drugs (NSAIDs) approved for the control of inflammation in swine due to a lack of validated animal models and suitable biomarkers to assess drug efficacy. This study investigates the differential expression of genes altered in response to Escherichia coli lipopolysaccharide (LPS) induced inflammation which may serve as indicators of NSAID efficacy. Unstimulated whole blood from swine was mixed with tissue culture media, stimulated with LPS, and RNA extracted at the following time points 0h, 1h, 3h, 24h and 48h. Total RNA was extracted and analyzed using a commercial swine DNA microarray. The DNA microarray was utilized as a screen to determine potential biomarkers, focusing on the genes that exhibited the greatest degree of differential expression. A master list of 57 genes was formed based on the differential expression as a result of the stimulation. Following analysis, 12 genes whose expressions were significantly altered (8 up- and 4 down-regulated) were chosen for verification via quantitative RT-PCR (qRT-PCR). The qRT-PCR analysis confirmed the differential expression of 11 of the 12 genes chosen via the microarray analyses. Specifically, traditional genes such as SAA, G-CSF, and IL-10 were up-regulated, while CD4 was down-regulated; all of the genes were altered by 24h or 48h post-stimulation. We demonstrate here that expression of these 11 genes is altered as a direct result of LPS stimulation and consequently inflammation.
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