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Liu X, Zhang Z, Liu J, Wang Y, Zhou Q, Wang S, Wang X. Ginsenoside Rg3 improves cyclophosphamide-induced immunocompetence in Balb/c mice. Int Immunopharmacol 2019; 72:98-111. [PMID: 30974284 DOI: 10.1016/j.intimp.2019.04.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/19/2019] [Accepted: 04/02/2019] [Indexed: 10/27/2022]
Abstract
Ginsenoside Rg3 (Rg3), which comprises Panax ginseng, is commonly used to improve the immunocompetence of cancer patients undergoing chemotherapy. This study was designed to elucidate the immunoenhancement effects of Rg3 in immunosuppressed mice induced by cyclophosphamide (CTX) treatment. Balb/c mice were administered Rg3 intragastrically once daily for 19 consecutive days and were intraperitoneally administered CTX (80 mg/kg) on days 15-19. Weight and immune organ indices were recorded. Hematological tests and cytokines were assessed using ELISA. We measured the activity of LDH and ACP, performed pathological and immunohistochemical staining of immune organs, and evaluated cytokines and transcription factors using RT-PCR. Immunosuppressed mice showed weight loss, decreased thymus and spleen indices and severe pathological damage. CTX attenuated macrophage phagocytosis by decreasing activity of LDH and ACP and decreased the release of related immune factors, IgG, IL-2 and G-CSF. Subsequently, we observed T lymphocyte expression on the surface of the thymus and spleen, which inhibited T cell activity. Further mechanistic analysis showed that CTX decreased the expression of T-bet and IFN-γ and increased the expression of GATA-3 and IL-4 in the thymus and spleen, which affected the Th1/Th2 balance. However, Rg3 treatment reversed CTX-induced immunosuppression. In summary, all the results suggest that Rg3 has protective effects on CTX-induced immunosuppression, which could be partially related to macrophages, T cells and Th1/Th2 balance. Although deeper studies of its mechanism are needed, these findings support the hypothesis that Rg3 can improve the reduced immunocompetence after CTX injury.
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Affiliation(s)
- Xiao Liu
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhaojian Zhang
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Jinghua Liu
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Yu Wang
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Qian Zhou
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishiku, Kitakyushu 807-8555, Japan
| | - Siwei Wang
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xiaoying Wang
- State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; College of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
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Cell free mitochondrial DNA in serum and milk associated with bovine mastitis: a pilot study. Vet Res Commun 2018; 42:275-282. [DOI: 10.1007/s11259-018-9735-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/20/2018] [Indexed: 01/23/2023]
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3
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Nandi A, Bishayi B. A novel CCR-2/TLR-2 triggered signaling in murine peritoneal macrophages intensifies bacterial ( Staphylococcus aureus ) killing by reactive oxygen species through TNF-R1. Immunol Lett 2017; 190:93-107. [DOI: 10.1016/j.imlet.2017.07.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/15/2017] [Indexed: 10/19/2022]
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Osorio J, Trevisi E, Ji P, Drackley J, Luchini D, Bertoni G, Loor J. Biomarkers of inflammation, metabolism, and oxidative stress in blood, liver, and milk reveal a better immunometabolic status in peripartal cows supplemented with Smartamine M or MetaSmart. J Dairy Sci 2014; 97:7437-50. [DOI: 10.3168/jds.2013-7679] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 09/01/2014] [Indexed: 11/19/2022]
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5
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Cardozo VF, Lancheros CA, Narciso AM, Valereto EC, Kobayashi RK, Seabra AB, Nakazato G. Evaluation of antibacterial activity of nitric oxide-releasing polymeric particles against Staphylococcus aureus and Escherichia coli from bovine mastitis. Int J Pharm 2014; 473:20-9. [DOI: 10.1016/j.ijpharm.2014.06.051] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 03/28/2014] [Accepted: 06/25/2014] [Indexed: 11/29/2022]
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6
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Wu R, Ru Q, Chen L, Ma B, Li C. Stereospecificity of Ginsenoside Rg3 in the Promotion of Cellular Immunity in Hepatoma H22-Bearing Mice. J Food Sci 2014; 79:H1430-5. [DOI: 10.1111/1750-3841.12518] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 04/14/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Rihui Wu
- Wuhan Inst. of Biomedical Sciences; Jianghan Univ; Wuhan 430056 China
| | - Qin Ru
- Wuhan Inst. of Biomedical Sciences; Jianghan Univ; Wuhan 430056 China
| | - Lin Chen
- Wuhan Inst. of Biomedical Sciences; Jianghan Univ; Wuhan 430056 China
| | - Baomiao Ma
- Wuhan Inst. of Biomedical Sciences; Jianghan Univ; Wuhan 430056 China
| | - Chaoying Li
- Wuhan Inst. of Biomedical Sciences; Jianghan Univ; Wuhan 430056 China
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De UK, Mukherjee R. Activity of cyclooxygenase-2 and nitric oxide in milk leucocytes following intramammary inoculation of a bio-response modifier during bovine Staphylococcus aureus subclinical mastitis. Vet Res Commun 2014; 38:201-7. [DOI: 10.1007/s11259-014-9604-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2014] [Indexed: 01/02/2023]
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8
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Silanikove N, Merin U, Leitner G. Nitrite and catalase levels rule oxidative stability and safety properties of milk: a review. RSC Adv 2014. [DOI: 10.1039/c4ra03851g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This review focuses on recent evidence showing that various types of udder inflammation (mastitis) are associated with increased concentration of NO˙-derived metabolites, nitrite and nitrate, and oxidatively modified organic components under commercial farming and experimental conditions.
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Affiliation(s)
- Nissim Silanikove
- Biology of Lactation Laboratory
- Agricultural Research Organization
- The Volcani Center
- Bet Dagan 50250, Israel
| | - Uzi Merin
- Department of Food Quality and Safety
- Agricultural Research Organization
- The Volcani Center
- Bet Dagan 50250, Israel
| | - Gabriel Leitner
- National Mastitis Reference Center
- Kimron Veterinary Institute
- Bet Dagan 50250, Israel
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10
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Le Maréchal C, Thiéry R, Vautor E, Le Loir Y. Mastitis impact on technological properties of milk and quality of milk products—a review. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s13594-011-0009-6] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Celi P. Oxidative Stress in Ruminants. OXIDATIVE STRESS IN APPLIED BASIC RESEARCH AND CLINICAL PRACTICE 2011. [DOI: 10.1007/978-1-61779-071-3_13] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Atakisi O, Oral H, Atakisi E, Merhan O, Metin Pancarci S, Ozcan A, Marasli S, Polat B, Colak A, Kaya S. Subclinical mastitis causes alterations in nitric oxide, total oxidant and antioxidant capacity in cow milk. Res Vet Sci 2010; 89:10-3. [PMID: 20132956 DOI: 10.1016/j.rvsc.2010.01.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2009] [Revised: 01/08/2010] [Accepted: 01/11/2010] [Indexed: 11/26/2022]
Abstract
The aim of this study was to investigate total antioxidant (TAC), and oxidant capacity (TOC) and nitric oxide (NO) levels in milk of cows with subclinical mastitis. Brown Swiss and Holstein breed cows were screened with California Mastitis Test (CMT) to determine mammary glands with subclinical mastitis. Moreover, somatic cell counts (SCC) were determined electronically in all milk samples. Mammary quarters were classified as healthy (n=25) or subclinical mastitis (n=35) based on CMT scores and somatic cell count (SCC: < or =200,000/ml or >200,000/ml) in milk. Nitric oxide, TOC and SCC levels were significantly higher (p<0.001, p<0.005 and p<0.001, respectively) in milk from mammary quarters with subclinical mastitis compared to those from healthy mammary quarters. In conclusion, subclinical mastitis results in higher NO concentrations, TOC and SCC, and NO and TOC were positively correlated with SCC. Moreover, alterations in NO levels and TOC in milk could be used as an alternative diagnostic tool to screen for subclinical mastitis.
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Affiliation(s)
- Onur Atakisi
- Department of Biochemistry, Faculty of Veterinary Medicine, Kafkas University, Kars, Turkey.
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Osman KM, Hassan HM, Ibrahim IM, Mikhail MM. The impact of staphylococcal mastitis on the level of milk IL-6, lysozyme and nitric oxide. Comp Immunol Microbiol Infect Dis 2010; 33:85-93. [DOI: 10.1016/j.cimid.2008.08.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2008] [Indexed: 10/21/2022]
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Osman KM, El-Enbaawy MI, Ezzeldin NA, Hussein HMG. Nitric oxide and lysozyme production as an impact to Clostridium perfringens mastitis. Comp Immunol Microbiol Infect Dis 2009; 33:505-11. [PMID: 19783303 DOI: 10.1016/j.cimid.2009.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The anaerobic mastitis incidence was used to study the bovine udder response in anaerobic bacterial mastitis caused by the Gram-positive bacterial strain of Clostridium perfringens. Milk samples positive for C. perfringens were assayed for NO and lysozyme. The model produced a strong NO and lysozyme response which correlated positively with the severity and outcome of the disease (subclinical and clinical stages). This study is, to our knowledge, the first to suggest a possible link between NO and lysozyme and bovine mastitis caused by C. perfringens. The results raise the possibility that interfering with NO production during mastitis may help to prevent tissue damage.
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Affiliation(s)
- Kamelia M Osman
- Department of Microbiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.
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16
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Hata E, Katsuda K, Kobayashi H, Nishimori K, Uchida I, Higashide M, Ishikawa E, Sasaki T, Eguchi M. Bacteriological characteristics of Staphylococcus aureus isolates from humans and bulk milk. J Dairy Sci 2008; 91:564-9. [PMID: 18218742 DOI: 10.3168/jds.2007-0457] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The aim of this study was to clarify the epidemiological association and bacteriological characteristics of human and animal Staphylococcus aureus isolates. Pulsed-field gel electrophoresis showed that pulsotypes (PT) of isolates from bulk milk differed from PT from human isolates, suggesting that there is no epidemiological association between isolates from these 2 sources. The absence of a common PT could result from the lack of contact between the sources. Methicillin-resistant S. aureus from human secretions and S. aureus from bulk milk in Japan consisted of 1 and 2 dominant clusters, respectively, whereas methicillin-susceptible S. aureus from humans consisted of assorted clusters. Isolates belonging to the dominant clusters showed the coagulase serotype, the capsule serotype, detection of exotoxin genes, and antimicrobial susceptibility. Isolates from bulk milk did not show the penicillin-binding protein 2a gene, and 252 of 275 isolates belonging to the 2 dominant clusters of bulk milk were susceptible to ampicillin, cefazolin, erythromycin, chloramphenicol, oxacillin, and vancomycin. Moreover, the LukM/LukF'-PV leukotoxin gene was detected in 233 of 275 isolates belonging to the dominant clusters in bulk milk isolates. These results support the hypothesis that a number of factors play a role in the adaptation of S. aureus isolates to specific hosts.
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Affiliation(s)
- E Hata
- Hokkaido Research Station, National Institute of Animal Health, 4 Hitsujigaoka, Toyohira-Ku, Sapporo, Hokkaido 062-0045, Japan.
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Prolactin stimulates the internalization of Staphylococcus aureus and modulates the expression of inflammatory response genes in bovine mammary epithelial cells. Vet Immunol Immunopathol 2008; 121:113-22. [DOI: 10.1016/j.vetimm.2007.09.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 07/11/2007] [Accepted: 09/26/2007] [Indexed: 11/23/2022]
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18
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Zhang B, Fang Y, Cao J, Zhang C, Ying M, He Q, Yang B. Involvement of immune response in anti-tumor effects of Staphylococcus aureus filtrate preparation. J Cancer Res Clin Oncol 2007; 134:373-9. [PMID: 17680268 DOI: 10.1007/s00432-007-0293-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2006] [Accepted: 07/18/2007] [Indexed: 10/23/2022]
Abstract
PURPOSE Staphylococcus Aureus Filtrate Preparation (SAFP) is a preparation of low-virulence strain of Staphylococcus aureus. In our study, we aimed to determine the anti-tumor activity of SAFP in vivo and explore the potential mechanism. METHODS Our study evaluated the anti-tumor activity of SAFP in four cancer cell models in vivo and determined its up-regulatory effects on mice immune system in vivo. RESULTS It showed that 7.2 ng/10 g SAFP could inhibit the progression of murine hepatoma H22 and sarcoma S180, and the tumor inhibition rates achieved 48.1 and 35.7%, respectively. In human non-small cell lung cancer A549 and hepatoma BEL7402 xenograft athymic mice models, T/C of 7.2 ng/10 g SAFP group reached 41.0% in A549 model and 21.0% in BEL7402 model. Meanwhile, SAFP also significantly increased the proliferation of cultured mice splenocytes to 162.1%, and 7.2 ng/kg SAFP significantly (P < 0.001) raised the activity of NK cells, elevated the serum level of IL-2, TNF-alpha and IFN-gamma in mice. CONCLUSION SAFP exhibited high efficiency in inhibiting the growth of cancer cells in a dose-dependent manner, which possibly attributed to its regulatory effects of immune system.
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Affiliation(s)
- Bo Zhang
- Institute of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang 310058, China
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Elsasser TH, Capuco AV, Caperna TJ, Martínez A, Cuttitta F, Kahl S. Adrenomedullin (AM) and adrenomedullin binding protein (AM-BP) in the bovine mammary gland and milk: Effects of stage of lactation and experimental intramammary E. coli infection. Domest Anim Endocrinol 2007; 32:138-54. [PMID: 16569490 DOI: 10.1016/j.domaniend.2006.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Revised: 02/16/2006] [Accepted: 02/17/2006] [Indexed: 11/19/2022]
Abstract
Adrenomedullin (AM) has been characterized as an endogenous tissue survival factor and modulator of many inflammatory processes. Because of the increased susceptibility of the mammary gland to infection during the time surrounding parturition in the cow, we investigated how milk and tissue content of AM and its binding protein (AM-BP) might be affected by the stage of lactation and the udder health status. Milk and mammary biopsy samples were obtained from Holstein cows 21 days prior to and at various times after calving to represent the dry period and early and mid-stages of lactation. Additional cows received an intramammary challenge with Escherichia coli for immunohistochemical characterization of AM and AM-BP. Milk AM concentrations were relatively constant across the stages of lactation while AM-BP increased two-fold (P<0.04) between early and mid-lactation. Milk AM (P<0.04) and AM-BP (P<0.03) increased as somatic cell counts (SCCs) increased within a given stage of lactation. Tissue content of both (AM and AM-BP) were significantly affected by stage of lactation, lowest in the dry period and progressively increasing to peak at mid-lactation as well as increasing in association with higher levels of SCCs. Following E. coli challenge, AM increased in epithelial cells surrounding mammary alveoli presenting high levels of SCCs. The data suggest that AM and AM-BP are cooperatively regulated in the mammary gland during lactation; changes in localized tissue AM and AM-BP content reflect a dynamic regulation of these tissue factors in the bovine mammary gland consistent with their protective effects within inflamed tissue.
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Affiliation(s)
- Ted H Elsasser
- USDA-ARS, Growth Biology Laboratory, Beltsville, MD 20705, US.
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Komine Y, Kuroishi T, Kobayashi J, Aso H, Obara Y, Kumagai K, Sugawara S, Komine KI. Inflammatory effect of cleaved bovine lactoferrin by elastase on staphylococcal mastitis. J Vet Med Sci 2006; 68:715-23. [PMID: 16891785 DOI: 10.1292/jvms.68.715] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Elastase activity and concanavalin A (Con A) low affinity bovine lactoferrin (bLf) molecule were detected in mammary gland secretions (MGSs) from mammary glands (MGs) with clinical staphylococcal mastitis. Changes in clinical symptoms correlated with increases in both elastase activity and the concentration of Con A low-affinity Lf in MGSs from mastitic MGs. Bovine Lf treated with elastase (elastase-Lf) showed various small bLf molecules and the same image on Con A two-dimensional immunoelectrophoresis as low Con A affinity bLf in MGSs. We confirmed the presence of four common bLf peptides for the elastase-bLf and low Con A affinity bLf molecules in mastitic MGSs, and synthesized four peptides. Strong mRNA expression of interleukin-6 (IL-6), tumor necrosis factor alpha (TNFalpha), interleukin-8 (IL-8), and monocyte chemotactic protein-1 (MCP-1) was induced in bovine mammary epithelial cells on stimulation with low Con A affinity bLf, elastase-bLf, and GQRDLLFKDSAL, a synthesis bLf peptide based on nuclear factor kappa B (NFkappaB) activation. These results suggest that bLf was cleaved by elastase, and that this cleavage changed the physical function of Lf. Our results indicate that elastase induced production of low Con A affinity bLf, including the bLf peptide GQRDLLFKDSAL, and had an inflammatory effect on staphylococcal mastitis.
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Affiliation(s)
- Yumiko Komine
- Intelligent Cosmos Research Institute Corporation, Sendia, Japan
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Lykkesfeldt J, Svendsen O. Oxidants and antioxidants in disease: oxidative stress in farm animals. Vet J 2006; 173:502-11. [PMID: 16914330 DOI: 10.1016/j.tvjl.2006.06.005] [Citation(s) in RCA: 420] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 06/05/2006] [Accepted: 06/20/2006] [Indexed: 12/28/2022]
Abstract
Important infectious diseases in farm animals, such as pneumonia and enteritis, are thought to be associated with the so-called oxidative stress, i.e. a chemical phenomenon involving an imbalance in the redox status of the individual animal. The specifics of oxidative stress and how it may result in disease or be prevented are complex questions with no simple answers. However, the considerable literature on the subject suggests that many researchers consider oxidative stress-related mechanisms to be important early events in disease development. A particularly intriguing aspect is that, at least theoretically, oxidative stress should be easily prevented with antioxidants yet the use of antioxidants as therapy remains controversial. The present knowledge on oxidative stress in farm animals is the topic of this review.
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Affiliation(s)
- Jens Lykkesfeldt
- Section of Biomedicine, Department of Veterinary Pathobiology, Royal Veterinary and Agricultural University, Copenhagen, Denmark.
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Rainard P, Riollet C. Innate immunity of the bovine mammary gland. Vet Res 2006; 37:369-400. [PMID: 16611554 DOI: 10.1051/vetres:2006007] [Citation(s) in RCA: 329] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2005] [Accepted: 10/19/2005] [Indexed: 11/14/2022] Open
Abstract
Understanding the immune defenses of the mammary gland is instrumental in devising and developing measures to control mastitis, the major illness of dairy ruminants. Innate immunity is an extremely broad field for investigation, and despite decades of research, our present knowledge of the innate defenses of the udder is incomplete. Yet, information is being gained on the recognition of pathogens by the mammary gland, and on several locally inducible defenses. The contribution of mammary epithelial cells to local defenses and to the mobilization of leucocytes is under growing scrutiny. Interactions of mastitis-causing bacteria such as Escherichia coli or Staphylococcus aureus and the mammary gland represents a suitable model for studies on innate immunity at an epithelium frontier. Powerful new research tools are radically modifying the prospects for the understanding of the interplay between the mammary gland innate defenses and mastitis-causing bacteria: genetic dissection of the immune response, microarray gene technology, transcriptomic methodologies and gene silencing by RNA interference will make possible the discovery of several of the key defense mechanisms which govern the susceptibility/resistance to mastitis at the molecular and genetic levels. It should then be possible to enhance the resistance of dairy ruminants to mastitis through immunomodulation and genetic improvement.
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Affiliation(s)
- Pascal Rainard
- Laboratoire de Pathologie Infectieuse et Immunologie, Institut National de la Recherche Agronomique, 37380 Nouzilly, France.
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Komine KI, Komine Y, Kuroishi T, Kobayashi J, Obara Y, Kumagai K. Small molecule lactoferrin with an inflammatory effect but no apparent antibacterial activity in mastitic mammary gland secretion. J Vet Med Sci 2005; 67:667-77. [PMID: 16082114 DOI: 10.1292/jvms.67.667] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We have identified various lactoferrin (Lf) molecules in mastitic mammary gland secretions (MGSs), and these Lf molecules were examined for their physiological function in MG. These Lf molecules were isolated by Con A affinity chromatography, and then analyzed by various electrophoresis methods and N-terminal amino acid sequencing. The low Con A affinity Lf was found to have low molecular peptides as compared with the 86 kDa of the high Con A affinity Lf, which is usually detected in healthy MGSs. The N-terminal amino acid sequence of each of the small molecular Lfs were confirmed as fragments of 86 kDa Lf. This low Con A affinity Lf stimulated spleen adherent cells to produce more O(2)(-) than 86 kDa Lf. Furthermore, the low Con A affinity Lf showed low antibacterial activity against E. coli and S. aureus, and had decreased iron-binding capacity in comparison with 86 kDa Lf. Moreover, the 86 kDa Lf could stimulate bovine T cells or macrophages to produce IFN-gamma, IL-4, IL-6, and IL-1alpha. However low Con A affinity Lf induced the production of TNFalpha, but not physiological T cell or macrophage cytokines. It was also found that when the healthy MGs of dry cows were injected with the low Con A affinity Lf, there was an increase in polymorphonuclear cells together with TNFalpha, MCP-1, and IL-8 production. These results suggested that low Con A affinity Lf in mastitic MGSs differed from 86 kDa Lf in physiological characteristics, and, that it induced an inflammatory reaction in MGs.
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Affiliation(s)
- Ken-ichi Komine
- T-Cell Research Institute, In Kyouitsu Seiyaku Corp, Tokyo, Japan
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Stenzel W, Soltek S, Miletic H, Hermann MM, Körner H, Sedgwick JD, Schlüter D, Deckert M. An essential role for tumor necrosis factor in the formation of experimental murine Staphylococcus aureus-induced brain abscess and clearance. J Neuropathol Exp Neurol 2005; 64:27-36. [PMID: 15715082 DOI: 10.1093/jnen/64.1.27] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Tumor necrosis factor-alpha (TNF-alpha) is a central mediator of the immune response to pathogens, but may also exert neurotoxic effects, thereby contributing to immunopathology. To define the role of TNF during the course of brain abscess, TNF-deficient (TNF(0/0) mice were stereotaxically infected with Staphylococcus (S.) aureus-laden agarose beads. In comparison to 100% survival of wild type (WT) mice, TNF(0/0) mice displayed high mortality rates (54%) in the initial phase of abscess development as well as significantly increased morbidity in the course of the disease. The worse clinical outcome was due to an increased intracerebral (i.c.) bacterial load in TNF(0/0) mice as compared to WT mice. The impaired control of S. aureus was associated with reduced inductible nitric oxide synthase (iNOS) mRNA and protein expression in TNF(0/0)mice. Similarly, numbers of inflammatory leukocytes, cytokine expression of IL-6, IL-12p40, IFNgamma IL-beta mRNA, and brain edema were significantly increased in TNF(0/0)mice as compared to WT animals. In addition, resolution of i.c. infiltrates was delayed in TNF(0/0)mice correlating with reduced apoptosis of inflammatory leukocytes and formation of a fibrous abscess capsule. Collectively, these data demonstrate that TNF is of key importance for the control of S. aureus-induced brain abscess and regulates the ensuing host immune response.
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Affiliation(s)
- Werner Stenzel
- Abteilung für Neuropathologie, Universität zu Köln, Germany
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