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Page 1 de 41 résultats
Development of Inflammatory Hypoxia and Prevalence of Glycolytic Metabolism in Progressing Herpes Stromal Keratitis Lesions.
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Chronic inflammation in tissues often causes the development of hypoxia. Herpes stromal keratitis (HSK) is a corneal chronic inflammatory condition that develops in response to recurrent HSV-1 infection. In this study, we investigated the development of hypoxia, the expression of hypoxia-associated
Are hypoxia or modulus causes of contact lens-associated keratitis?
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Contact lens-related microbial keratitis: Part II: Pathophysiology.
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The literature is reviewed concerning the pathophysiologic effects of contact-lens wear, the microbiology of contact-lens wear, the change in microflora with contact-lens wear, the contamination of contact lenses and contact-lens products, patient compliance, and corneal interaction with the contact
Pseudomonas keratitis associated with continuous wear silicone-hydrogel soft contact lens: a case report.
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OBJECTIVE
To report a case of Pseudomonas aeruginosa culture-positive microbial keratitis in a patient wearing continuous-wear silicone hydrogel soft contact lenses.
METHODS
A 23-year-old white woman in good health had been wearing silicone hydrogel (lotrafilcon A) soft contact lenses continuously
Case reports of three atypical infiltrative keratitis events with high DK soft contact lens wear.
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OBJECTIVE
We report three atypical infiltrative keratitis events in patients that had successfully worn highly oxygen permeable (Dk) soft contact lenses on an extended wear (EW) schedule for at least 15 months. These cases highlight the role of patient/practitioner education, patient compliance,
Hypoxia-altered signaling pathways of toll-like receptor 4 (TLR4) in human corneal epithelial cells.
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OBJECTIVE
Toll-like receptor 4 (TLR4), a member of the TLR family, is an important pattern recognition molecule that plays a role in the host's innate immune responses to lipopolysaccharide (LPS), a component of gram-negative bacteria. Contact lens wear is one of the risk factors for bacterial
Hypoxia attenuates inflammatory mediators production induced by Acanthamoeba via Toll-like receptor 4 signaling in human corneal epithelial cells.
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Acanthamoeba keratitis (AK) is a vision-threatening corneal infection that is intimately associated with contact lens use which leads to hypoxic conditions on the corneal surface. However, the effect of hypoxia on the Acanthamoeba-induced host inflammatory response of corneal epithelial cells has
Case Report: Post-keratoplasty Filamentary Keratitis Managed with Scleral Lens.
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CONCLUSIONS
This case report details a unique case of filamentary keratitis after penetrating keratoplasty managed with a scleral contact lens. The positive effect on vision and comfort are reported, and the challenges related to hypoxia are discussed.
OBJECTIVE
The purpose of this study was to
Pseudomonas keratitis and contact lens wear: the lens/eye is at fault.
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Microbial keratitis with Pseudomonas aeruginosa is the most common corneal infection associated with contact lenses (CLs). Pseudomonas organisms are ubiquitous in nature, and can colonize CLs without a prior breach in lens care or hygiene. Although poor lens care is often found in affected patients,
Hypoxia increases corneal cell expression of CFTR leading to increased Pseudomonas aeruginosa binding, internalization, and initiation of inflammation.
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OBJECTIVE
To investigate the effect of hypoxia-induced molecular responses of corneal epithelial cells on the surface of rabbit and human corneas and corneal cells in culture on interactions with Pseudomonas aeruginosa that may underlie increased susceptibility to keratitis.
METHODS
Organ cultures
Contact lens wear and microbial keratitis.
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Common types of contact lens are hard, rigid gas-permeable or soft lenses. Most lenses are worn on a daily basis. Cosmetic lenses are worn for non-medical indications. Microbial keratitis, a rare but most significant complication is discussed in this article. Pseudomonas aeruginosa and staphylococci
Risk factors for contact lens associated microbial keratitis.
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Although the risk of developing contact lens associated microbial keratitis is small, the potential consequences of this condition, such as vision loss, are serious. This paper presents an analysis of the risk factors that have been identified for contact lens induced microbial keratitis, which
The effects of silicone hydrogel lens wear on the corneal epithelium and risk for microbial keratitis.
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Previous studies using animal models and human clinical trials have demonstrated that the use of low-oxygen-transmissible contact lens materials produce corneal epithelial surface damage resulting in increased Pseudomonas aeruginosa (PA) adhesion and raft-mediated internalization into surface
Current concepts: contact lens related Pseudomonas keratitis.
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Despite the development of silicone hydrogel lenses, Pseudomonas aeruginosa (PA) continues to be the leading cause of contact lens related microbial keratitis. Understanding the pathogenesis of PA-mediated corneal infection is critical to the development of new prevention and treatment strategies.
HIF-1α is essential for effective PMN bacterial killing, antimicrobial peptide production and apoptosis in Pseudomonas aeruginosa keratitis.
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Hypoxia-inducible factor (HIF)-1α, is a transcription factor that controls energy metabolism and angiogenesis under hypoxic conditions, and a potent regulator of innate immunity. The studies described herein examined the role of HIF-1α in disease resolution in BALB/c (resistant, cornea heals) mice
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