About: Doxycycline is a research topic. Over the lifetime, 1949 publications have been published within this topic receiving 54691 citations. The topic is also known as: Microdox & GS-3065.
TL;DR: There is considerable impairment of health-related quality of life among patients with persistent symptoms despite previous antibiotic treatment for acute Lyme disease, and treatment with intravenous and oral antibiotics for 90 days did not improve symptoms more than placebo.
Abstract: Background It is controversial whether prolonged antibiotic treatment is effective for patients in whom symptoms persist after the recommended antibiotic treatment for acute Lyme disease. Methods We conducted two randomized trials: one in 78 patients who were seropositive for IgG antibodies to Borrelia burgdorferi at the time of enrollment and the other in 51 patients who were seronegative. The patients received either intravenous ceftriaxone, 2 g daily for 30 days, followed by oral doxycycline, 200 mg daily for 60 days, or matching intravenous and oral placebos. Each patient had well-documented, previously treated Lyme disease but had persistent musculoskeletal pain, neurocognitive symptoms, or dysesthesia, often associated with fatigue. The primary outcome measures were improvement on the physical- and mental-health–component summary scales of the Medical Outcomes Study 36-Item Short-Form General Health Survey (SF-36) — a scale measuring the health-related quality of life — on day 180 of the study. Resu...
TL;DR: A single 200-mg dose of doxycycline given within 72 hours after an I. scapularis tick bite can prevent the development of Lyme disease.
Abstract: Background It is unclear whether antimicrobial treatment after an Ixodes scapularis tick bite will prevent Lyme disease. Methods In an area of New York where Lyme disease is hyperendemic, we conducted a randomized, double-blind, placebo-controlled trial of treatment with a single 200-mg dose of doxycycline in 482 subjects who had removed attached I. scapularis ticks from their bodies within the previous 72 hours. At base line, three weeks, and six weeks, subjects were interviewed and examined, and serum antibody tests were performed, along with blood cultures for Borrelia burgdorferi. Results Erythema migrans developed at the site of the tick bite in a significantly smaller proportion of the subjects in the doxycycline group than of those in the placebo group (1 of 235 subjects [0.4 percent] vs. 8 of 247 subjects [3.2 percent], P<0.04). The efficacy of treatment was 87 percent (95 percent confidence interval, 25 to 98 percent). Objective extracutaneous signs of Lyme disease did not develop in any subject,...
TL;DR: Both methylprednisolone and doxycycline reduced expression and activity of MMP-9, decreased levels of inflammatory cytokines transcripts and reduced activation of MAPKs in the corneal epithelium in response to EDE.
TL;DR: The mode of interaction of tetracyclines with the ribosome and mechanism of action of this class of antibiotics to inhibit translation are described and an overview of the diverse mechanisms by which bacteria obtain resistance to tetrACYclines is provided.
Abstract: The ribosome and protein synthesis are major targets within the cell for inhibition by antibiotics, such as the tetracyclines. The tetracycline family of antibiotics represent a large and diverse group of compounds, ranging from the naturally produced chlortetracycline, introduced into medical usage in the 1940s, to second and third generation semi-synthetic derivatives of tetracycline, such as doxycycline, minocycline and more recently the glycylcycline tigecycline. Here we describe the mode of interaction of tetracyclines with the ribosome and mechanism of action of this class of antibiotics to inhibit translation. Additionally, we provide an overview of the diverse mechanisms by which bacteria obtain resistance to tetracyclines, ranging from efflux, drug modification, target mutation and the employment of specialized ribosome protection proteins.
TL;DR: The influence of age, renal disease, malnutrition and hyperlipidaemia is reviewed, together with the main pharmacokinetic interactions of doxycycline and minocycline.
Abstract: Doxycycline and minocycline are second-generation tetracyclines. They are readily absorbed, distributed throughout the organism as a function of their lipophilicity and eliminated in both the urine and the faeces. The influence of age, renal disease, malnutrition and hyperlipidaemia is reviewed, together with the main pharmacokinetic interactions.