Sandra S Haddad

Learn More
BenM, a bacterial transcriptional regulator, responds synergistically to two effectors, benzoate and cis,cis-muconate. CatM, a paralog with overlapping function, responds only to muconate. Structures of their effector-binding domains revealed two effector-binding sites in BenM. BenM and CatM are the first LysR-type regulators to be structurally(More)
BenM and CatM control transcription of a complex regulon for aromatic compound degradation. These Acinetobacter baylyi paralogues belong to the largest family of prokaryotic transcriptional regulators, the LysR-type proteins. Whereas BenM activates transcription synergistically in response to two effectors, benzoate and cis,cis-muconate, CatM responds only(More)
OBJECTIVE Our aim was to determine the prevalence and the risk factors for diabetic retinopathy (DR) in a cohort of type II diabetic patients in Lebanon. DESIGN Prospective observational cohort study. PARTICIPANTS Five hundred consecutive patients with type II diabetes mellitus followed at the American University of Beirut Medical Center diabetes clinic(More)
LysR-type transcriptional regulators comprise the largest family of homologous regulatory DNA-binding proteins in bacteria. A problematic challenge in the crystallization of LysR-type regulators stems from the insolubility and precipitation difficulties encountered with high concentrations of the full-length versions of these proteins. A general(More)
BenM, a member of the LysR-type family of transcriptional regulators, controls genes for benzoate degradation in the Gram-negative bacterium Acinetobacter sp. strain ADP1. Recent studies show that BenM activates benABCDE expression synergistically in response to two effector ligands: cis,cis-muconate (CCM) and benzoate. As an initial step in investigating(More)
OBJECTIVES The objective of this study was to evaluate the effect of discussing retinal findings following nonmydriatic retinal imaging during an endocrinology visit on subsequent HbA1c in poorly controlled diabetic patients with diabetic retinopathy (DR). MATERIALS AND METHODS During a visit to an endocrinologist, patients with DR and documented HbA1c ≥(More)
Biological fluid identification is an important facet of evidence examination in forensic laboratories worldwide. While identifying bodily fluids may provide insight into which downstream DNA methods to employ, these screening techniques consume a vital portion of the available evidence, are usually qualitative, and rely on visual interpretation. In(More)
PURPOSE To study the modifications induced by physical training (PT) using upper limbs in aerobic condition of short duration on cardiovascular and metabolic variables. METHODS Eleven paraplegic persons, with a mean age of 59 years, 7 men and 4 women with lesions at T9 through T11 and mild hypertension (HAS) were studied. The patients were studied before(More)
BACKGROUND AND OBJECTIVE Nonmydriatic fundus photography (FP) has been a suboptimal tool for detecting age-related macular degeneration (AMD) changes. This study sought to enhance the detection of AMD changes by combining nonmydriatic FP with nonmydriatic spectral-domain optical coherence tomography (SD-OCT). PATIENTS AND METHODS The study population(More)