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Potentiation of the in vitro antistaphylococcal effect of oxacillin and tetracycline by the anti-inflammatory drug diacetyl rhein.

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BACKGROUND The anti-inflammatory drug diacetyl rhein has been found to possess promising antistaphylococcal effects against various drug-resistant strains in our previous study. In the present work, we explored the in vitro combinatory interactions of diacetyl rhein with oxacillin and tetracycline

Evaluation of the in vivo anti-inflammatory and analgesic and in vitro anti-cancer activities of curcumin and its derivatives.

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Curcumin, obtained from turmeric, has several biological properties to make it a desirable template for drug development. A lipophilic derivative of curcumin, diacetyl curcumin (DAC) and a hydrophilic derivative, diglutaryl curcumin (DGC) were synthesized and their in vivo analgesic and

Pathology, toxicology, and latency of irritant gases known to cause bronchiolitis obliterans disease: Does diacetyl fit the pattern?

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Bronchiolitis obliterans (BO) is a rare disease involving concentric bronchiolar fibrosis that develops rapidly following inhalation of certain irritant gases at sufficiently high acute doses. While there are many potential causes of bronchiolar lesions involved in a variety of chronic lung

A semisynthetic diterpenoid lactone inhibits NF-κB signalling to ameliorate inflammation and airway hyperresponsiveness in a mouse asthma model.

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Andrographolide (AGP) and 14-deoxy-11,12-didehydroandrographolide (DDAG), two main diterpenoid constituents of Andrographis paniculata were previously shown to ameliorate asthmatic symptoms in a mouse model. However, due to inadequacies of both compounds in terms of drug-likeness, DDAG analogues

Pathology of diacetyl and 2,3-pentanedione airway lesions in a rat model of obliterative bronchiolitis.

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Inhalation of diacetyl vapors by workers has been associated with obliterative bronchiolitis (OB), a poorly understood fibroproliferative disease of the small airways. Significant insights into the pathogenesis of OB have been obtained through the use of a rat model. Inhalation exposure of rats to

Respiratory toxicity of diacetyl in C57BL/6 mice.

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Diacetyl, a component of artificial butter flavoring, is a potential etiological agent of obliterative bronchiolitis (OB); however, the toxic dose and mechanisms of toxicity remain controversial. We evaluated the respiratory toxicity of diacetyl in a murine model using several exposure profiles

Novel 12-membered non-antibiotic macrolides from erythromycin A; EM900 series as novel leads for anti-inflammatory and/or immunomodulatory agents.

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Herein, we report the design and synthesis of the novel 12-membered non-antibiotic macrolide (8R,9S)-8,9-dihydro-6,9-epoxy-8,9-anhydropseudoerythromycin A (EM900), which was found to be a potent anti-inflammatory and/or immunomodulatory agent, capable of promoting monocyte to macrophage

Airway injury in an in vitro human epithelium-fibroblast model of diacetyl vapor exposure: diacetyl-induced basal/suprabasal spongiosis.

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Inhalation exposure to diacetyl (DA) is associated with obliterative bronchiolitis (OB) in workers and induces OB-like fibrotic airway lesions in rats. The pathogenesis of OB is poorly understood in part due to complex interactions between airway epithelial, mesenchymal and blood-derived

Evaluation of diacetyl mediated pulmonary effects in physiologically relevant air-liquid interface models of human primary bronchial epithelial cells.

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Diacetyl is an artificial flavouring agent, known to cause bronchiolitis obliterans. Diacetyl-induced pulmonary effects were assessed in human primary bronchial epithelial cells (PBEC) cultured at air-liquid interface (ALI). The PBEC-ALI models were exposed to clean air (sham) and diacetyl vapour

Diacetyl exposure as a pneumotoxic factor: a review.

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Diacetyl (2,3-butanedione) is a natural ingredient in foodstuffs which is not generally regarded health risk to consumers. Nevertheless, when manufactured for use as a synthetic flavouring/additive in processed foods (e.g. microwave popcorn), it poses a human health threat at the workplace. Its

Diacetyl increases sensory innervation and substance P production in rat trachea.

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Inhalation of diacetyl, a butter flavoring, causes airway responses potentially mediated by sensory nerves. This study examines diacetyl-induced changes in sensory nerves of tracheal epithelium. Rats (n = 6/group) inhaled 0-, 25-, 249-, or 346-ppm diacetyl for 6 hr. Tracheas and vagal ganglia were

Effects of the immunomodulator diacetyl-splenopentin on antigen-induced arthritis in rabbits.

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Long-term treatment with the immunomodulator diacetyl-splenopentin reduces the severity of chronic joint inflammation and cartilage destruction in rabbits with antigen-induced arthritis. The level of specific antibodies as well as specific and non-specific cell-mediated immune reactivities including

1O, 20O-diacetyl kamebakaurin protects against acetaminophen-induced hepatotoxicity in mice.

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The present study aimed to investigate the protective effects of kamebakaurin (KA) and 1O, 20O-diacetyl kamebakaurin (Ac2KA) on acetaminophen (APAP)-induced hepatotoxicity and compare the hepatoprotective mechanisms of the two chemicals. Seven-week-old male C57BL/6J mice were orally administered KA,

Clinical, biochemical and immunological effectiveness of diacetyl-splenopentin (BCH 069) in hay fever.

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Diacetyl-splenopentin (BCH 069) is a new pentapeptide of splenin modified by twofold acetylation. BCH 069 has thymopentin-like activity demonstrated by in vivo animal and in vitro human studies. Two groups of patients received 50 mg BCH 069 and placebo, respectively, by subcutaneous injection 3

The conversion of redox status of peritoneal macrophages during pathological progression of spontaneous inflammatory bowel disease in Janus family tyrosine kinase 3(-/-) and IL-2 receptor gamma(-/-) mice.

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The distinct thiol redox status in macrophages, either elevated or reduced intracellular content of glutathione (GSH), was confirmed during aging in IL-2 receptor (IL-2R)gamma and Janus family tyrosine kinase (JAK)3 gene-disrupted mice. Oxidative macrophages (OMp) with reduced GSH dominated

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