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ALPHA GAL

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https://www.readbyqxmd.com/read/29753686/pharmacological-inhibition-of-the-mitochondrial-nadph-oxidase-4-pkc%C3%AE-gal-3-pathway-reduces-left-ventricular-fibrosis-following-myocardial-infarction
#1
Maria Del Carmen Asensio-Lopez, Antonio Lax Perez, Maria Josefa Fernandez Del Palacio, Yassine Sassi, Roger J Hajjar, Domingo A Pascual-Figal
Although the initial reparative fibrosis after myocardial infarction (MI) is crucial for preventing rupture of the ventricular wall, an exaggerated fibrotic response and reactive fibrosis outside the injured area are detrimental. Although metformin prevents adverse cardiac remodeling, as well as provides glycemic control, the underlying mechanisms remain poorly documented. This study describes the effect of mitochondrial NADPH oxidase 4 (mitoNox) and protein kinase C-alpha (PKCα) on the cardiac fibrosis and galectin 3 (Gal-3) expression...
April 23, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29695259/porcine-pulmonary-valve-decellularization-with-naoh-based-vs-detergent-process-preliminary-in-vitro-and-in-vivo-assessments
#2
Mathieu van Steenberghe, Thomas Schubert, Sébastien Gerelli, Caroline Bouzin, Yves Guiot, Daela Xhema, Xavier Bollen, Karim Abdelhamid, Pierre Gianello
BACKGROUND: Glutaraldehyde fixed xenogeneic heart valve prosthesis are hindered by calcification and lack of growth potential. The aim of tissue decellularization is to remove tissue antigenicity, avoiding the use of glutaraldehyde and improve valve integration with low inflammation and host cell recolonization. In this preliminary study, we investigated the efficacy of a NaOH-based process for decellularization and biocompatibility improvement of porcine pulmonary heart valves in comparison to a detergent-based process (SDS-SDC0, 5%)...
April 25, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29695047/a-combined-nmr-computational-study-of-the-interaction-between-influenza-virus-hemagglutinin-and-sialic-derivatives-from-human-and-avian-receptors-on-the-surface-of-transfected-cells
#3
Francesca Vasile, Maddalena Panigada, Antonio Siccardi, Donatella Potenza, Guido Tiana
The development of small-molecule inhibitors of influenza virus Hemagglutinin could be relevant to the opposition of the diffusion of new pandemic viruses. In this work, we made use of Nuclear Magnetic Resonance (NMR) spectroscopy to study the interaction between two derivatives of sialic acid, Neu5Ac-α-(2,6)-Gal-β-(1⁻4)-GlcNAc and Neu5Ac-α-(2,3)-Gal-β-(1⁻4)-GlcNAc, and hemagglutinin directly expressed on the surface of recombinant human cells. We analyzed the interaction of these trisaccharides with 293T cells transfected with the H5 and H1 variants of hemagglutinin, which thus retain their native trimeric conformation in such a realistic environment...
April 24, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29679764/meat-reintroduction-in-a-patient-with-alpha-gal-allergy
#4
Teresa Pelletier, Santiago Alvarez-Arango, F N U Sameeta, Ellen Manos, Elina Jerschow
No abstract text is available yet for this article.
April 18, 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29617297/the-combinational-use-of-crispr-cas9-and-targeted-toxin-technology-enables-efficient-isolation-of-bi-allelic-knockout-non-human-mammalian-clones
#5
Satoshi Watanabe, Takayuki Sakurai, Shingo Nakamura, Kazuchika Miyoshi, Masahiro Sato
Recent advances in genome editing systems such as clustered regularly interspaced short palindromic repeats/CRISPR-associated protein-9 nuclease (CRISPR/Cas9) have facilitated genomic modification in mammalian cells. However, most systems employ transient treatment with selective drugs such as puromycin to obtain the desired genome-edited cells, which often allows some untransfected cells to survive and decreases the efficiency of generating genome-edited cells. Here, we developed a novel targeted toxin-based drug-free selection system for the enrichment of genome-edited cells...
April 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29604134/b4galnt2-and-xenotransplantation-a-newly-appreciated-xenogeneic-antigen
#6
REVIEW
Guerard Byrne, Saadullah Ahmad-Villiers, Zeji Du, Christopher McGregor
Analysis of non-Gal antibody induced after pig-to-baboon cardiac xenotransplantation identified the glycan produced by porcine beta-1,4-N-acetyl-galactosaminyltransferase 2 (B4GALNT2) as an immunogenic xenotransplantation antigen. The porcine B4GALNT2 enzyme is homologous to the human enzyme, which synthesizes the human SDa blood group antigen. Most humans produce low levels of anti-SDa IgM which polyagglutinates red blood cells from rare individuals with high levels of SDa expression. The SDa glycan is also present on GM2 gangliosides...
March 31, 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29580181/decellularised-cartilage-directs-chondrogenic-differentiation-creation-of-a-fracture-callus-mimetic
#7
Wollis Jude Vas, Mittal Shah, Thomas Stephen Blacker, Michael Roland Duchen, Paul Sibbons, Scott John Roberts
Complications that arise from impaired fracture healing have considerable socioeconomic implications. Current research in the field of bone tissue engineering predominantly aims to mimic the mature bone tissue microenvironment. This approach, however, may produce implants that are intrinsically unresponsive to the cues present during the initiation of fracture repair. As such, this study describes the development of decellularised xenogeneic hyaline cartilage matrix in an attempt to mimic the initial reparative phase of fracture repair...
March 27, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29492269/mammalian-meat-allergy-following-a-tick-bite-a-case-report
#8
W Landon Jackson
The alpha-gal allergy is an emerging IgE-mediated reaction against the galactose-alpha-1,3-galactose carbohydrate found in mammalian meats. Patients with this condition will develop anaphylactic symptoms 3-6 h after the ingestion of mammalian meat food products such as beef, pork or lamb. The prevalence of this allergy is drastically increasing and severe reactions including anaphylactic shock have been reported, yet many patients experience symptoms for years before a diagnosis is made. We describe the presentation, diagnosis and management of a patient with the alpha-gal allergy in attempt to improve early recognition and management of patients with this condition...
February 2018: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/29486531/establishment-and-identification-of-cell-lines-from-type-o-blood-korean-native-pigs-and-their-efficiency-in-supporting-embryonic-development-via-somatic-cell-nuclear-transfer
#9
Anukul Taweechaipaisankul, Geon A Kim, Jun-Xue Jin, Su Cheong Yeom, Byeong Chun Lee
Due to their close similarities with humans in anatomy, physiology and genetics and handling advantages, miniature pigs are becoming a very attractive model for biomedical research. The purpose of this study was to establish and evaluate blood type O cells derived from Korean native pig (KNP), a typical miniature pig breed in Korea. Total 10 cell lines derived from 8 KNP piglets, adult KNP female pig (kidney and ear tissues) were established. To confirm the blood type O, genomic DNA, fucosyltransferase (FUT) expression and immunofluorescence staining were examined...
February 27, 2018: Journal of Veterinary Science
https://www.readbyqxmd.com/read/29478384/in-vitro-detection-system-to-evaluate-the-immunogenic-potential-of-xenografts
#10
Aila Daugs, Nadine Lehmann, Dilem Eroglu, Martina C Meinke, Annina Markhoff, Oliver Bloch
Tissue antigenicity represents the main limitation for the use of xenografts in clinical practice. To eliminate xenoantigens and avoid graft rejection in human, decellularization is often used to remove all immunoreactive components from the extracellular matrix (ECM). After decellularization, acellular scaffolds are required to be investigated regarding the presence of antigens, but commonly used detection methods solely focus on known xenoantigens such as alpha Gal (Galα1,3-Galβ1-4GlcNAc-R) or major histocompatibility complex-I (MHC-I)...
May 2018: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/29476735/functional-and-pharmacological-evaluation-of-novel-gla-variants-in-fabry-disease-identifies-six-two-de-novo-causative-mutations-and-two-amenable-variants-to-the-chaperone-dgj
#11
Lorenzo Ferri, Duccio Malesci, Antonella Fioravanti, Gaia Bagordo, Armando Filippini, Anna Ficcadenti, Raffaele Manna, Daniela Antuzzi, Elena Verrecchia, Ilaria Donati, Renzo Mignani, Catia Cavicchi, Renzo Guerrini, Amelia Morrone
BACKGROUND: Allelic heterogeneity is an important feature of the GLA gene for which almost 900 known genetic variants have been discovered so far. Pathogenetic GLA variants cause alpha-galactosidase A (α-Gal A) enzyme deficiency leading to the X-linked lysosomal storage disorder Fabry disease (FD). Benign GLA intronic and exonic variants (e.g. pseudodeficient p.Asp313Tyr) have also been described. Some GLA missense variants, previously deemed to be pathogenetic (e.g. p.Glu66Gln and p...
June 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29464986/protective-effects-of-thymoquinone-on-d-galactose-and-aluminum-chloride-induced-neurotoxicity-in-rats-biochemical-histological-and-behavioral-changes
#12
Yasmin S Abulfadl, Nabila N El-Maraghy, Amany Ali Eissa Ahmed, Shahira Nofal, Osama A Badary
OBJECTIVES: Thymoquinone (TQ), the main active ingredient in Nigella sativa oil, exhibits various bioactivities. This study aimed to investigate the effect of TQ on neurobehavioral and neuropathological alterations induced by aluminum trichloride (AlCl3 ) and D-galactose (D-gal)-in male rats and to explore the related mechanisms. METHODS: D-gal (60 mg/kg day) and AlCl3 (10 mg/kg day) were given intraperitoneally (i.p.) once daily for 42 days and after 4 weeks TQ was concomitantly administered intragastrically (i...
April 2018: Neurological Research
https://www.readbyqxmd.com/read/29405769/thymoquinone-alleviates-the-experimentally-induced-alzheimer-s-disease-inflammation-by-modulation-of-tlrs-signaling
#13
Y S Abulfadl, N N El-Maraghy, Aa Eissa Ahmed, S Nofal, Y Abdel-Mottaleb, O A Badary
Alzheimer's disease (AD) is characterized by a robust inflammatory response elicited by the accumulation and deposition of amyloid-β (Aβ) within the brain. Aβ induces detrimental inflammatory responses through toll-like receptors (TLRs) signaling pathway. Thymoquinone (TQ), the main active constituent of Nigella sativa oil, has been reported by several previous studies for its potent anti-inflammatory effect. The aim of this study is to elucidate the effect of TQ in improving learning and memory, using a rat model of AD induced by a combination of aluminum chloride (AlCl3 ) and d-galactose (d-Gal)...
January 1, 2018: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29362613/protective-effects-of-the-third-generation-vasodilatory-%C3%AE-eta-blocker-nebivolol-against-d-galactosamine-induced-hepatorenal-syndrome-in-rats
#14
Ahmed Atwa, Rehab Hegazy, Rania Mohsen, Neamat Yassin, Sanaa Kenawy
BACKGROUND: Renal dysfunction is very common in patients with advanced liver cirrhosis and portal hypertension. The development of renal failure in the absence of clinical, anatomical or pathological causes renal of failure is termed hepatorenal syndrome (HRS). AIM: The present study was constructed to investigate the possible protective effects of nebivolol (Nebi) against D-galactosamine (Gal)-induced HRS in rats. MATERIAL AND METHODS: Rats were treated with Nebi for ten successive days...
December 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29350022/an-unusual-case-of-positive-sige-to-galactose-alpha-1-3-galactose-from-south-italy
#15
C G Uasuf, A Torina, V Ferrantelli, I Brusca
We report the case of a 38-year-old man who was bitten several times during his life by a tick. He didn't report any previous history of anaphylaxis after the ingestion of red meat. The serum specific IgE showed positivity to α-Gal. The proximity of the bits didn't increase the titer of IgE antibodies to alpha-gal. We could hypothesize that the frequency of the exposure to the tick Corresponding author bites and the amount of tick bites during his lifetime induced a sort of tolerance in this patient.
January 2018: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29273488/repeated-amblyomma-testudinarium-tick-bites-are-associated-with-increased-galactose-%C3%AE-1-3-galactose-carbohydrate-ige-antibody-levels-a-retrospective-cohort-study-in-a-single-institution
#16
Hideo Hashizume, Toshiharu Fujiyama, Takatsune Umayahara, Reiko Kageyama, Andrew F Walls, Takahiro Satoh
BACKGROUND: Alpha-gal syndrome is a hypersensitivity reaction to red meat mediated by IgE antibody specific to galactose-α-1,3-galactose carbohydrate (alpha-gal). Amblyomma tick bites are associated with this condition, but the pathophysiology is not understood. OBJECTIVE: To clarify the mechanism of development of alpha-gal syndrome after tick bites. METHODS: We compared alpha-gal antibody levels between patients with and without a history of tick bites and examined histologic stainings of tick bite lesions between patients with and without detectable alpha-gal IgE antibody...
December 19, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29235434/ige-antibodies-to-alpha-gal-in-foresters-and-forest-workers-from-la-rioja-north-of-spain
#17
M Venturini, T Lobera, A Sebastián, A Portillo, J A Oteo
BACKGROUND AND OBJECTIVE: To investigate the prevalence and associated factors to the presence of alpha-gal-specific IgE in a risk group of foresters and forest workers from La Rioja and in a control group. METHODS: A total of 169 workers and 100 individuals who did not recall tick-bites were selected. A questionnaire including demographic data and number of tick bites per year was administered by a physician. Alpha-gal sIgE was assessed with serum samples that had been taken in 2010 using ImmunoCAP®...
December 13, 2017: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/29199072/maternal-brain-tnf-%C3%AE-programs-innate-fear-in-the-offspring
#18
Bojana Zupan, Bingfang Liu, Faten Taki, Judit Gal Toth, Miklos Toth
Tumor necrosis factor alpha (TNF-α) is a cytokine that not only coordinates local and systemic immune responses [1, 2] but also regulates neuronal functions. Most prominently, glia-derived TNF-α has been shown to regulate homeostatic synaptic scaling [3-6], but TNF-α-null mice exhibited no apparent cognitive or emotional abnormalities. Instead, we found a TNF-α-dependent intergenerational effect, as mothers with a deficit in TNF-α programmed their offspring to exhibit low innate fear. Cross-fostering and conditional knockout experiments indicated that a TNF-α deficit in the maternal brain, rather than in the hematopoietic system, and during gestation was responsible for the low-fear offspring phenotype...
December 18, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29196214/the-lysosomal-enzyme-alpha-galactosidase-a-is-deficient-in-parkinson-s-disease-brain-in-association-with-the-pathologic-accumulation-of-alpha-synuclein
#19
Michael P Nelson, Michel Boutin, Tonia E Tse, Hailin Lu, Emily D Haley, Xiaosen Ouyang, Jianhua Zhang, Christiane Auray-Blais, John J Shacka
The aberrant accumulation of alpha-synuclein (α-syn) is believed to contribute to the onset and pathogenesis of Parkinson's disease (PD). The autophagy-lysosome pathway (ALP) is responsible for the high capacity clearance of α-syn. ALP dysfunction is documented in PD and pre-clinical evidence suggests that inhibiting the ALP promotes the pathological accumulation of α-syn. We previously identified the pathological accumulation of α-syn in the brains of mice deficient for the soluble lysosomal enzyme alpha-Galactosidase A (α-Gal A), a member of the glycosphingolipid metabolism pathway...
February 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29176033/tnf%C3%AE-senescence-initiates-a-stat-dependent-positive-feedback-loop-leading-to-a-sustained-interferon-signature-dna-damage-and-cytokine-secretion
#20
Renuka Kandhaya-Pillai, Francesc Miro-Mur, Jaume Alijotas-Reig, Tamara Tchkonia, James L Kirkland, Simo Schwartz
Cellular senescence is a cell fate program that entails essentially irreversible proliferative arrest in response to damage signals. Tumor necrosis factor-alpha (TNFα), an important pro-inflammatory cytokine secreted by some types of senescent cells, can induce senescence in mouse and human cells. However, downstream signaling pathways linking TNFα-related inflammation to senescence are not fully characterized. Using human umbilical vein endothelial cells (HUVECs) as a model, we show that TNFα induces permanent growth arrest and increases p21CIP1, p16INK4A, and SA-β-gal, accompanied by persistent DNA damage and ROS production...
November 22, 2017: Aging
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