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https://www.readbyqxmd.com/read/29345385/crucial-role-of-mer-tyrosine-kinase-in-the-maintenance-of-sign-r1-marginal-zone-macrophages
#1
Chetna Soni, Stephanie L Schell, Melinda J Fasnacht, Sathi Babu Chodisetti, Ziaur Sm Rahman
Mer Tyrosine Kinase receptor (Mer) is involved in anti-inflammatory efferocytosis. Here we report elevated spontaneous germinal center (Spt-GC) responses in Mer-deficient mice (Mer-/- ) that are associated with the loss of SIGN-R1+ marginal zone macrophages (MZMs). The dissipation of MZMs in Mer-/- mice occurs independently of reduced cellularity or delocalization of marginal zone B cells, sinusoidal cells or of CD169+ metallophillic macrophages. We find that MZM dissipation in Mer-/- mice contributes to apoptotic cell (AC) accumulation in Spt-GCs and dysregulation of the GC checkpoint, allowing an expansion of DNA-reactive B cells in GCs...
December 18, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/29310671/antituberculosis-activity-phytochemical-identification-of-costus-speciosus-j-koenig-sm-cymbopogon-citratus-dc-ex-nees-stapf-and-tabernaemontana-coronaria-l-willd-and-their-effects-on-the-growth-kinetics-and-cellular-integrity-of-mycobacterium-tuberculosis-h37rv
#2
Suriyati Mohamad, Nur Najihah Ismail, Thaigarajan Parumasivam, Pazilah Ibrahim, Hasnah Osman, Habibah A Wahab
BACKGROUND: Costus speciosus, Cymbopogon citratus, and Tabernaemontana coronaria are herbal plants traditionally used as remedies for symptoms of tuberculosis (TB) including cough. The aims of the present study were to evaluate the in vitro anti-TB activity of different solvent partitions of these plants, to identify the phytochemical compounds, and to assess the effects of the most active partitions on the growth kinetics and cellular integrity of the tubercle organism. METHODS: The in vitro anti-TB activity of different solvent partitions of the plant materials was determined against M...
January 8, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29290190/determination-of-specificity-and-pattern-of-antinuclear-antibodies-ana-in-systemic-rheumatic-disease-patients-positive-for-ana-testing
#3
Hamid Nawaz Tipu, Muhammad Mukarram Bashir
OBJECTIVE: To determine probability of finding antinuclear antibodies (ANA) and anti extractable nuclear antigens (ENA) positive samples and associating ANA patterns with anti-ENA reactivities among a consecutive cohort of samples of systemic rheumatic disease patients referred for ANA testing. STUDY DESIGN: Prospective cohort study. PLACE AND DURATION OF STUDY: Immunology Department, Armed Forces Institute of Pathology, Rawalpindi, Pakistan, from January to June 2016...
January 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29288893/a-series-of-novel-complexes-firstly-constructed-by-1-4-phenylenedioxydiacetic-acid-plays-a-role-in-disruption-of-dna-gene-expression-and-induction-of-apoptosis
#4
Mingchang Zhu, Tingting Peng, Na Sun, Xue Qiu, Yang Zhan, Yuqing Ding, Shaozhong Zhang, Enjun Gao
A set of five metal-organic frameworks, namely, [Cd2(L)2BIP(H2O)2·6H2O]n(1), [Ce(L)1.5(H2O)2·H2O]n(2),[Sm(L)1.5(H2O)2·3H2O]n(3),[Gd(L)1.5(H2O)2·3H2O]n(4),[Ho(L)1.5(H2O)2·3H2O]n(5), have been prepared under hydrothermal conditions (1,4-H2L=1,4-Pheny lenedioxydiacetic acid; 1,4-BIP=1,4-bis(2-pyridylmethyl)piperazi-ne; C2H5OH=EtOH). The long BIP ligand (N⋯N separation of ca. 8.355Å) induces interpenetration of 1 to increase both the framework stability and the density of effective catalytic metal centers...
November 11, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29274563/iga-anti-%C3%AE-2-glycoprotein-i-antibodies-experience-from-a-large-center
#5
Alexandru Vlagea, Dora Pascual-Salcedo, Rita Álvarez Doforno, Paz Lavilla, Jesús Diez, Beatriz Padilla Merlano, María V Cuesta, Antonio Gil
OBJECTIVE: IgG and IgM antibodies directed at β2-glycoprotein I are included in the classification criteria for the antiphospholipid syndrome (APS) while the IgA antibodies against β2-glycoprotein I (IgA aβ2GPI) are not. Conflicting data about the significance of IgA aβ2GPI and APS manifestation can be found and more studies are necessary in order to define the diagnostic value of IgA aβ2GPI. In the present article, we investigated the possible role of IgA aβ2GPI as marker of APS...
December 12, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29260019/influenza-a-h3n2-induced-rhabdomyolysis-complicating-anterior-compartment-syndrome-serial-changes-in-muscle-mri-t2-fat-suppression-imaging
#6
Tadanori Hamano, Akiko Matsunaga, Osamu Yamamura, Masako Nakamura, Yasutaka Kawamura, Itsuro Higuchi, Masaru Kuriyama, Yasunari Nakamoto
Background: Rhabdomyolysis with influenza infection is rarely reported in adults. We report here influenza A induced rhabdomyolysis and anterior compartment syndrome (ACS). Case report: This case report describes a 43-year-old woman exhibiting influenza A induced rhabdomyolysis. High levels of creatine kinase (97,000 IU/L) and high titer of anti-influenza A virus antibody (H3N2) (320 ×) with negative anti-influenza B virus antibody were observed. T2 fat suppression muscle MRI imaging showed high-intensity signals in rectus femoris, vastus lateralis, adductor magnus, and semimembranosus (SM) muscles...
June 2017: ENeurologicalSci
https://www.readbyqxmd.com/read/29240800/effect-of-long-term-dietary-sphingomyelin-supplementation-on-atherosclerosis-in-mice
#7
Rosanna W S Chung, Zeneng Wang, Christina A Bursill, Ben J Wu, Philip J Barter, Kerry-Anne Rye
Sphingomyelin (SM) levels in the circulation correlate positively with atherosclerosis burden. SM is a ubiquitous component of human diets, but it is unclear if dietary SM increases circulating SM levels. Dietary choline increases atherosclerosis by raising circulating trimethylamine N-oxide (TMAO) levels in mice and humans. As SM has a choline head group, we ask in this study if dietary SM accelerates atherosclerotic lesion development by increasing circulating SM and TMAO levels. Three studies were performed: (Study 1) C57BL/6 mice were maintained on a high fat diet with or without SM supplementation for 4 weeks prior to quantification of serum TMAO and SM levels; (Study 2) atherosclerosis was studied in apoE-/- mice after 16 weeks of a high fat diet without or with SM supplementation and (Study 3) apoE-/- mice were maintained on a chow diet for 19 weeks without or with SM supplementation and antibiotic treatment prior to quantification of atherosclerotic lesions and serum TMAO and SM levels...
2017: PloS One
https://www.readbyqxmd.com/read/29214036/strong-viral-associations-with-sle-among-filipinos
#8
Evan S Vista, Michael H Weisman, Mariko L Ishimori, Hua Chen, Rebecka L Bourn, Ben F Bruner, Laniyati Hamijoyo, Robelle D Tanangunan, Noga J Gal, Julie M Robertson, John B Harley, Joel M Guthridge, Sandra V Navarra, Judith A James
Objectives: Epstein-Barr virus (EBV) is considered an important environmental factor in SLE aetiology, but the relationship between SLE and EBV in the Filipino population is unknown. We tested associations between SLE, lupus-associated autoantibodies and seropositivity for EBV and other herpes viruses in the Filipino population. Methods: Sera from Filipino patients with SLE (n=233), unaffected first-degree relatives (FDRs, n=543) and unrelated controls (n=221) were tested for antibodies against EBV, cytomegalovirus (CMV) and herpes simplex viruses (HSV-1 and HSV-2) by standardised ELISAs...
2017: Lupus Science & Medicine
https://www.readbyqxmd.com/read/29174984/efficacy-of-anti-inflammatory-antibiotic-and-pleiotropic-agents-in-reversing-nitrogen-mustard-induced-injury-in-ex-vivo-cultured-rabbit-cornea
#9
Dinesh G Goswami, Rama Kant, Neera Tewari-Singh, Rajesh Agarwal
Vesicating agent, Sulfur mustard (SM), causes devastating eye injury; however, there are no effective antidotes available. Using nitrogen mustard (NM), a bi-functional analog of SM, we have earlier reported that NM-induced corneal injury in ex vivo rabbit cornea organ culture model parallels corneal injury reported with SM. Using this model, we have demonstrated the therapeutic efficacy of dexamethasone (DEX), doxycycline (DOX) and silibinin (SB) in reversing NM (2h exposure)-induced corneal injuries when added immediately after washing NM...
November 23, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29141544/recent-updates-on-the-phytochemistry-pharmacological-and-toxicological-activities-of-zingiber-zerumbet-l-roscoe-ex-sm
#10
Md Areeful Haque, Ibrahim Jantan
BACKGROUND: Zingiber zerumbet (L.) Roscoe ex Sm. (family, Zingiberaceae) is a potent medicinal herb widely known as shampoo ginger and its rhizome is used in numerous ethnomedicinal applications including as antipyretic, anti-inflammatory, antibacterial, anti-diarrheal, antidiabetics, carminative, and diuretic. AIM: The aim of this review was to bring together all of scientific updates on the phytochemistry and pharmacological activities of this herb, including their toxicological studies, and critically analyzed the outcomes to provide directions for future research on the herb as potential source of bioactive metabolites for pharmaceutical and nutraceutical applications...
November 14, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29138805/extracellular-polysaccharides-purified-from-aureobasidium-pullulans-sm%C3%A2-2001-polycan-inhibit-dexamethasone%C3%A2-induced-muscle-atrophy-in-mice
#11
Jong-Min Lim, Young Joon Lee, Hyung-Rae Cho, Dong-Chan Park, Go-Woon Jung, Sae Kwang Ku, Jae-Suk Choi
The present study assessed the beneficial skeletal muscle‑preserving effects of extracellular polysaccharides from Aureobasidium pullulans SM‑2001 (Polycan) (EAP) on dexamethasone (DEXA)‑induced catabolic muscle atrophy in mice. To investigate whether EAP prevented catabolic DEXA‑induced muscle atrophy, and to examine its mechanisms of action, EAP (100, 200 and 400 mg/kg) was administered orally, once a day for 24 days. EAP treatment was initiated 2 weeks prior to DEXA treatment (1 mg/kg, once a day for 10 days) in mice...
November 10, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29129815/biological-effects-of-adipocytes-in-sulfur-mustard-induced-toxicity
#12
Hua Xu, Zhongcai Gao, Peng Wang, Bin Xu, Yajiao Zhang, Long Long, Cheng Zong, Lei Guo, Weijian Jiang, Qinong Ye, Lili Wang, Jianwei Xie
Sulphur mustard (2,2'-dichloroethyl sulfide; SM) is a vesicant chemical warfare agent whose mechanism of acute or chronic action is not known with any certainty and to date there is no effective antidote. SM accumulation in adipose tissue (AT) has been originally verified in our previous study. To evaluate the biological effect caused by the presence of abundant SM in adipocyte and assess the biological role of AT in SM poisoning, in vitro and in vivo experiments were performed. High content analysis revealed multi-cytotoxicity in SM exposed cells in a time and dose dependent manner, and adipocytes showed a relative moderate damage compared with non-adipocytes...
November 10, 2017: Toxicology
https://www.readbyqxmd.com/read/29127031/sulfur-mustard-induced-mast-cell-degranulation-in-mouse-skin-is-inhibited-by-a-novel-anti-inflammatory-and-anticholinergic-bifunctional-prodrug
#13
Laurie B Joseph, Gabriella M Composto, Roberto M Perez, Hong-Duck Kim, Robert P Casillas, Ned D Heindel, Sherri C Young, Carl J Lacey, Jaya Saxena, Christophe D Guillon, Claire R Croutch, Jeffrey D Laskin, Diane E Heck
Sulfur mustard (SM, bis(2-chloroethyl sulfide) is a potent vesicating agent known to cause skin inflammation, necrosis and blistering. Evidence suggests that inflammatory cells and mediators that they generate are important in the pathogenic responses to SM. In the present studies we investigated the role of mast cells in SM-induced skin injury using a murine vapor cup exposure model. Mast cells, identified by toluidine blue staining, were localized in the dermis, adjacent to dermal appendages and at the dermal/epidermal junction...
November 7, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29118999/associates-and-predictors-of-pleurisy-or-pericarditis-in-sle
#14
Seungwon Ryu, Wei Fu, Michelle A Petri
Background/Purpose: Serositis is one of both ACR and SLICC classification criteria for systemic lupus erythematosus (SLE) and a common type of extra renal flare. However, little is known about clinical or immunological associations of pleurisy or pericarditis. The aim of this study is to analyze associates and predictors of pleurisy versus pericarditis in Caucasians and African Americans with SLE. Methods: 2,390 SLE patients in the Hopkins Lupus Cohort were analyzed for demographic, clinical and serologic associates of pleurisy or pericarditis, defined using the SELENA revision of the SLE Disease Activity Index (SLEDAI)...
2017: Lupus Science & Medicine
https://www.readbyqxmd.com/read/29082408/facile-synthesis-of-highly-biocompatible-folic-acid-functionalised-sio2-nanoparticles-encapsulating-rare-earth-metal-complexes-and-their-application-in-targeted-drug-delivery
#15
Xiuling Xu, Fan Hu, Qi Shuai
Mesoporous silica core-shell nanospheres encapsulating a rare-earth metal complex (RC) were first synthesised through a facile W/O (water in oil) inverse microemulsion method. In order to achieve targeted complex delivery, folic acid (FA) was used as the targeting component due to its high affinity for over-expressed folate receptors (FRs) in cancer cells. The RC2@SiO2-FA nanospheres were characterised via ultraviolet-visible light absorption spectroscopy (UV-vis spectroscopy), dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)...
November 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29070858/soloxolone-methyl-inhibits-influenza-virus-replication-and-reduces-virus-induced-lung-inflammation
#16
Andrey V Markov, Alexandra V Sen'kova, Dawid Warszycki, Oksana V Salomatina, Nariman F Salakhutdinov, Marina A Zenkova, Evgeniya B Logashenko
Highly pathogenic influenza viruses pose a serious public health threat to humans. Although vaccines are available, new antivirals are needed to efficiently control disease progression and virus transmission due to the emergence of drug-resistant viral strains. In this study, we describe the anti-viral properties of Soloxolone methyl (SM) (methyl 2-cyano-3,12-dioxo-18βH-olean-9(11),1(2)-dien-30-oate, a chemical derivative of glycyrrhetinic acid) against the flu virus. Anti-flu efficacy studies revealed that SM exhibits antiviral activity against the H1N1 influenza A virus in a dose-dependent manner causing a more than 10-fold decrease in virus titer and a reduction in the expression of NP and M2 viral proteins...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29070689/both-sphingomyelin-and-cholesterol-in-the-host-cell-membrane-are-essential-for-rubella-virus-entry
#17
Noriyuki Otsuki, Masafumi Sakata, Kyoko Saito, Kiyoko Okamoto, Yoshio Mori, Kentaro Hanada, Makoto Takeda
Rubella virus (RuV) causes a systemic infection and transplacental fetal infection causes congenital rubella syndrome. In this study, we showed that treatment of cells with sphingomyelinase inhibited RuV infection. Assays using inhibitors of serine palmitoyl transferase and ceramide transport protein demonstrated the contribution of sphingomyelin (SM) to RuV infection. Compelling evidence for direct binding of RuV to lipid membranes at neutral pH was obtained using liposome co-flotation assays. The absence of either SM or cholesterol (Chol) abrogated the RuV--liposome interaction...
October 25, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29036980/-cd137-induces-vascular-muscle-cells-phenotype-transformation-through-activating-nuclear-factor-of-activated-t-cells-1-signaling
#18
W Zhong, B Li, J Liu, Y Xu, R Chen, C Shao, Z Q Wang, J C Yan
Objective: To investigate whether CD137 induces primary vascular muscle cells (VSMCs) phenotype transformation through activating nuclear factor of activated T-cells 1(NFATc1) signaling. Methods: VSMCs were obtained from aorta of C57BL/6J mice (8 weeks, male) through tissue-piece inoculating. Cells were divided into control group, CD137 agonist group (treated with CD137L recombinant protein) and anti-CD137 group (treated with anti-CD137 antibody). In si-RNA transfection assay, cells were divided into si-control group and si-NFATc1 group which were transfected with control or si-NFATc1 sequence respectively...
September 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28968652/prefrontal-cortex-contributions-to-the-development-of-memory-formation
#19
Lingfei Tang, Andrea T Shafer, Noa Ofen
The development of the brain, particularly the protracted maturation of the prefrontal cortex (PFC), supports the development of episodic memory. Yet how different regions of the PFC functionally mature to support age-related increases in memory performance remains unclear. We investigated the PFC contribution to subsequent memory (SM) of encoded visual scenes in children, adolescents, and young adults (n = 83). We identified distinct patterns of PFC activations supporting SM: regions in the lateral PFC showed positive SM effects, whereas regions in the superior and medial PFC showed negative SM effects...
August 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28935574/taurocholate-induces-biliary-differentiation-of-liver-progenitor-cells-causing-hepatic-stellate-cell-chemotaxis-in-the-ductular-reaction-role-in-pediatric-cystic-fibrosis-liver-disease
#20
Katarzyna N Pozniak, Michael A Pearen, Tamara N Pereira, Cynthia S M Kramer, Priyakshi Kalita-De Croft, Sujeevi K Nawaratna, Manuel A Fernandez-Rojo, Geoffrey N Gobert, Janina E E Tirnitz-Parker, John K Olynyk, Ross W Shepherd, Peter J Lewindon, Grant A Ramm
Cystic fibrosis liver disease (CFLD) in children causes progressive fibrosis leading to biliary cirrhosis; however, its cause(s) and early pathogenesis are unclear. We hypothesized that a bile acid-induced ductular reaction (DR) drives fibrogenesis. The DR was evaluated by cytokeratin-7 immunohistochemistry in liver biopsies, staged for fibrosis, from 60 children with CFLD, and it demonstrated that the DR was significantly correlated with hepatic fibrosis stage and biliary taurocholate levels. To examine the mechanisms involved in DR induction, liver progenitor cells (LPCs) were treated with taurocholate, and key events in DR evolution were assessed: LPC proliferation, LPC biliary differentiation, and hepatic stellate cell (HSC) chemotaxis...
September 19, 2017: American Journal of Pathology
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