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Mohanned Naif Alhussien, Ajay Kumar Dang
The aim of the current study was to investigate the responses of milk neutrophils and plasma inflammatory cytokines to various mastitis pathogens and subsequently on milk composition. Milk was collected from healthy (n = 10) and clinical mastitis indigenous Sahiwal cows naturally infected either with gram-positive bacteria mainly S. aureus (n = 10) and Strep. agalactiae (n = 10) or with gram-negative bacteria, E. coli (n = 10). Phagocytic activity of milk neutrophils decreased in all mastitis cows with the lowest values recorded during gram-positive bacterial infections...
May 19, 2018: Microbial Pathogenesis
Qing Cao, Biru Li, Xike Wang, Kun Sun, Ying Guo
Introduction: Sustained neutrophilic infiltration is known to contribute to organ damage, such as acute lung injury (ALI). CXC chemokine receptor 2 (CXCR2) is the major receptor regulating inflammatory neutrophil recruitment in acute and chronic inflamed tissues. The purpose of this study was to investigate the functional relevance of the CXCR2 inhibitor SB225002 in LPS-induced acute lung injury. Material and methods: Male C57BL/6 mice were randomly divided into the following four experimental groups ( n = 10 per group): untreated group (control group, Ctr); LPS-treated ALI group (LPS group, LPS); LPS + PBS-treated group (LPS + PBS); and SB225002-treated ALI group (LPS + SB225002)...
April 2018: Archives of Medical Science: AMS
Shengling Fu, Xiang Chen, Huey-Jen Lin, Jiayuh Lin
Interactions between interleukin (IL)-8 and its receptors, C‑X-C chemokine receptor 1, (CXCR1) and CXCR2 serve crucial roles in increasing cancer progression. Inhibition of this signaling pathway has yielded promising results in a number of human cancers, including breast, melanoma and colon. However, the effects of CXCR1/2 antagonist treatment on pancreatic cancer remain unclear. The present study aimed to demonstrate that treatment with the clinical grade CXCR1/2 antagonist, reparixin, or the newly discovered CXCR1/2 antagonist, SCH527123, may result in a reduction of the malignant features associated with this lethal cancer...
April 30, 2018: International Journal of Oncology
Lu Dai, Jing Qiao, Luis Del Valle, Zhiqiang Qin
High-risk human papillomavirus (HPV) infection is the etiological agent of cervical, oral and oropharyngeal cancers. Another oncogenic virus, Kaposi sarcoma-associated herpesvirus (KSHV) can cause several human cancers arising in those immunocompromised patients. KSHV DNA has been detected in the oral cavity and the female genital tract, although its detection rate in cervical samples is relatively low. Therefore, it remains unclear about the role of KSHV co-infection in the development of HPV-related neoplasia...
2018: American Journal of Cancer Research
Juliana B Candido, Jennifer P Morton, Peter Bailey, Andrew D Campbell, Saadia A Karim, Thomas Jamieson, Laura Lapienyte, Aarthi Gopinathan, William Clark, Ewan J McGhee, Jun Wang, Monica Escorcio-Correia, Raphael Zollinger, Rozita Roshani, Lisa Drew, Loveena Rishi, Rebecca Arkell, T R Jeffry Evans, Colin Nixon, Duncan I Jodrell, Robert W Wilkinson, Andrew V Biankin, Simon T Barry, Frances R Balkwill, Owen J Sansom
Pancreatic ductal adenocarcinoma (PDAC) is resistant to most therapies including single-agent immunotherapy and has a dense desmoplastic stroma, and most patients present with advanced metastatic disease. We reveal that macrophages are the dominant leukocyte population both in human PDAC stroma and autochthonous models, with an important functional contribution to the squamous subtype of human PDAC. We targeted macrophages in a genetic PDAC model using AZD7507, a potent selective inhibitor of CSF1R. AZD7507 caused shrinkage of established tumors and increased mouse survival in this difficult-to-treat model...
May 1, 2018: Cell Reports
Christina Groepper, Kerstin Rufinatscha, Nadja Schröder, Sabine Stindt, Christian Ehlting, Ute Albrecht, Hans H Bock, Ralf Bartenschlager, Dieter Häussinger, Johannes G Bode
BACKGROUND & AIMS: To affect immune response and inflammation, the hepatitis C virus (HCV) substantially influences intercellular communication pathways that are decisive for immune cell recruitment. The present study investigates mechanisms by which HCV modulates chemokine-mediated intercellular communication of the infected cells. METHODS: Chemokine expression is studied in HCVcc -infected cell lines or cell lines harbouring a subgenomic replicon as well as in serum samples from patients...
April 26, 2018: Journal of Hepatology
Mana Taki, Kaoru Abiko, Tsukasa Baba, Junzo Hamanishi, Ken Yamaguchi, Ryusuke Murakami, Koji Yamanoi, Naoki Horikawa, Yuko Hosoe, Eijiro Nakamura, Aiko Sugiyama, Masaki Mandai, Ikuo Konishi, Noriomi Matsumura
Snail is a major transcriptional factor that induces epithelial-mesenchymal transition (EMT). In this study, we explore the effect of Snail on tumor immunity. Snail knockdown in mouse ovarian cancer cells suppresses tumor growth in immunocompetent mice, associated with an increase of CD8+ tumor-infiltrating lymphocytes and a decrease of myeloid-derived suppressor cells (MDSCs). Snail knockdown reduces the expression of CXCR2 ligands (CXCL1 and CXCL2), chemokines that attract MDSCs to the tumor via CXCR2. Snail upregulates CXCR ligands through NF-kB pathway, and most likely, through direct binding to the promoters...
April 27, 2018: Nature Communications
Sambor Grygorczuk, Renata Świerzbińska, Maciej Kondrusik, Justyna Dunaj, Piotr Czupryna, Anna Moniuszko, Agnieszka Siemieniako, Sławomir Pancewicz
BACKGROUND: Tick-borne encephalitis (TBE) is a clinically variable but potentially severe Flavivirus infection, with the outcome strongly dependent on secondary immunopathology. Neutrophils are present in cerebrospinal fluid (CSF) of TBE patients, but their pathogenetic role remains unknown. In animal models, neutrophils contributed both to the Flavivirus entry into central nervous system (CNS) and to the control of the encephalitis, which we attempted to evaluate in human TBE. METHODS: We analyzed records of 240 patients with TBE presenting as meningitis (n = 110), meningoencephalitis (n = 114) or meningoencephalomyelitis (n = 16) assessing CSF neutrophil count on admission and at follow-up 2 weeks later, and their associations with other laboratory and clinical parameters...
April 20, 2018: Journal of Neuroinflammation
Nadijane Valeria Ferreira da Mota, Milena Karina Colo Brunialti, Sidneia Sousa Santos, Flavia Ribeiro Machado, Murillo Assunçao, Luciano Cesar Pontes de Azevedo, Reinaldo Salomao
Monocytes and macrophages are pivotal in the host response to sepsis, recognizing the infecting microorganism and triggering an inflammatory response. These functions are, at least in part, modulated by the expression of cell surface receptors. We aimed to characterize the monocyte phenotype from septic patients during an ongoing sepsis process and its association with clinical outcomes. Sixty-one septic patients and 31 healthy volunteers (HVs) were enrolled in the study. Samples were obtained from patients at baseline (D0, N = 61), and after 7 (D7, N = 36) and 14 days of therapy (D14, N = 22)...
December 5, 2017: Shock
Wen-Ze Qiu, Hai-Bo Zhang, Wei-Xiong Xia, Liang-Ru Ke, Jing Yang, Ya-Hui Yu, Hu Liang, Xin-Jun Huang, Guo-Ying Liu, Wang-Zhong Li, Yan-Qun Xiang, Tie-Bang Kang, Xiang Guo, Xing Lv
BACKGROUND: Distant metastasis is the major cause of treatment failure in patients with nasopharyngeal carcinoma (NPC). Although several biomarkers correlate with metastasis and prognosis, the molecular mechanisms of NPC development and progression remain unclear. METHODS: Quantitative RT-PCR (qRT-PCR), western blotting, cell growth, foci formation, migration and invasion assays, and xenograft mouse models were utilized to examine the expression levels and functions of the CXCL5/CXCR2 axis in NPC...
April 17, 2018: Journal of Experimental & Clinical Cancer Research: CR
Soichiro Hiramatsu, Hiroaki Tanaka, Junya Nishimura, Chie Sakimura, Tatsuro Tamura, Takahiro Toyokawa, Kazuya Muguruma, Masakazu Yashiro, Kosei Hirakawa, Masaichi Ohira
BACKGROUND: Tumor-Associated Neutrophils (TANs) may be able to induce lymphangiogenesis and angiogenesis, although the detailed roles of TANs remain unclear. The Neutrophil-Lymphocyte Ratio (NLR) is an inflammation-based prognostic factor for gastric cancer. This study aimed to investigate the distribution of CD15+ neutrophils in the primary tumor and Tumor-Draining Lymph Nodes (TDLNs), and to examine the association of TANs with the clinicopathological features (including NLR) of patients with gastric cancer...
April 16, 2018: BMC Immunology
Soichiro Sasaki, Tomohisa Baba, Hayato Muranaka, Yamato Tanabe, Chiaki Takahashi, Seiichi Matsugo, Naofumi Mukaida
Adjuvant chemotherapy is used for human breast cancer patients, even after curative surgery of primary tumor, in order to prevent tumor recurrence primarily as a form of metastasis. However, anti-cancer drugs can accelerate metastasis in several mouse metastasis models. Hence, we examined the effects of post-surgical administration with 5-fluorouracil (5-FU), doxorubicin, and cyclophosphamide, on lung metastasis process, which developed after the resection of the primary tumor arising from the orthotopic injection of a mouse triple-negative breast cancer cell line, 4T1...
April 11, 2018: Molecular Cancer Therapeutics
S Peter, M A Gärtner, G Michel, M Ibrahim, R Klopfleisch, A Lübke-Becker, M Jung, R Einspanier, C Gabler
Potential beneficial effects of lactic acid bacteria on the genital health of cows become of particular interest when considering the importance of an optimal uterine health status for the success of breeding in dairy farming. Therefore, the aim of the present study was to analyse the influence of an intrauterine administration of the Lactobacillus buchneri DSM 32407 on reproductive performance, uterine health status, endometrial mRNA expression of pro-inflammatory factors of cows with signs of subclinical endometritis (SCE)...
April 3, 2018: Scientific Reports
Jie-Tao He, Hong-Yan Huang, Dong Qu, Ye Xue, Kai-Kai Zhang, Xiao-Li Xie, Qi Wang
Detection of the vitality of wounds is one of the most important issues in forensic practice. This study investigated mRNA and protein levels of CXCL1 and CXCR2 in skin wounds in mice and humans. Western blot analysis of CXCL1 and CXCR2 protein levels showed no difference between wounded and intact skin. However, mRNA levels demonstrated higher expression of CXCL1 and CXCR2 in contused mouse and human skin, compared with intact skin. At postmortem there were no remarkable changes in CXCL1 and CXCR2 mRNA levels in contused mouse skin...
April 2, 2018: Forensic Science, Medicine, and Pathology
Sandeep Kumar Yadav, Sara W Feigelson, Francesco Roncato, Merav Antman-Passig, Orit Shefi, Jan Lammerding, Ronen Alon
Transendothelial migration (TEM) of lymphocytes and neutrophils is associated with the ability of their deformable nuclei to displace endothelial cytoskeletal barriers. Lamin A is a key intermediate filament component of the nuclear lamina that is downregulated during granulopoiesis. When elevated, lamin A restricts nuclear squeezing through rigid confinements. To determine if the low lamin A expression by leukocyte nuclei is critical for their exceptional squeezing ability through endothelial barriers, we overexpressed this protein in granulocyte-like differentiated HL-60 cells...
March 30, 2018: Journal of Leukocyte Biology
Bingbing Qiao, Wenqin Luo, Yanna Liu, Jing Wang, Chuan Liu, Zhao Liu, Sizhe Chen, Jingjing Gu, Xiaolong Qi, Tongwei Wu
Background & Aims: Quite a few studies had investigated the correlation between CXC chemokine receptor 2 (CXCR2) and cancer. This meta-analysis was aimed to comprehensively summarize the previous studies and to explore the prognostic value of CXCR2 in patients with cancer. Materials and Methods: An adequate literature search in EMBASE and PubMed was conducted. Articles in English which have reported CXCR2 expression in patients and enough data to calculate hazard ratio (HR) were included...
March 13, 2018: Oncotarget
Michael Lacy, Christos Kontos, Markus Brandhofer, Kathleen Hille, Sabine Gröning, Dzmitry Sinitski, Priscila Bourilhon, Eric Rosenberg, Christine Krammer, Tharshika Thavayogarajah, Georgios Pantouris, Maria Bakou, Christian Weber, Elias Lolis, Jürgen Bernhagen, Aphrodite Kapurniotu
MIF is a chemokine-like cytokine that plays a role in the pathogenesis of inflammatory and cardiovascular disorders. It binds to the chemokine-receptors CXCR2/CXCR4 to trigger atherogenic leukocyte migration albeit lacking canonical chemokine structures. We recently characterized an N-like-loop and the Pro-2-residue of MIF as critical molecular determinants of the CXCR4/MIF binding-site and identified allosteric agonism as a mechanism that distinguishes CXCR4-binding to MIF from that to the cognate ligand CXCL12...
March 26, 2018: Scientific Reports
Shi-Sheng Han, Yan Lu, Min Chen, Yan-Qiu Xu, Yi Wang
The aim of this study was to determine whether a correlation exists between interleukin-8 receptor polymorphisms and urinary tract infection (UTI) susceptibility. We systematically searched electronic databases including PubMed, Embase, China National Knowledge Infrastructure, and Web of Science up to November 5, 2017 to select appropriate studies that focused on C-X-C chemokine receptor type 1 and/or 2 (CXCR1, CXCR2) polymorphisms with susceptibility to UTI. Eight case-control studies including 2085 patients with UTI and 2012 controls were enrolled in this study...
March 25, 2018: Nephrology
Akira Inoue, Tsunekazu Mizushima, Xin Wu, Daisuke Okuzaki, Nanami Kambara, Sho Ishikawa, Jiaqi Wang, Yamin Qian, Haruka Hirose, Yuhki Yokoyama, Ryo Ikeshima, Masayuki Hiraki, Norikatsu Miyoshi, Hidekazu Takahashi, Naotsugu Haraguchi, Taishi Hata, Chu Matsuda, Yuichiro Doki, Masaki Mori, Hirofumi Yamamoto
We previously demonstrated that miR-29b-3p is a hopeful miRNA-based therapy against colorectal cancer. In this study, we aimed to clarify a value of miR-29b-1-5p as a next-generation treatment, especially for KRAS -mutant colorectal cancer. RT-PCR assay showed that the expression of miR-29b-3p was high, and its partner strand, miR-29b-1-5p, level was only negligible in clinical colorectal cancer samples. Mimic-miR-29b-1-5p significantly inhibited proliferation of KRAS -mutant colorectal cancer cell lines DLD1 and SW480 and KRAS wild-type HT29 cells...
May 2018: Molecular Cancer Therapeutics
Pierre Paradis, Ernesto L Schiffrin
No abstract text is available yet for this article.
March 8, 2018: European Heart Journal
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