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#28918619   2017/09/18 Save this To Up

Discoid Lupus Erythematosus Presenting as Upper Eyelid Edema and Erythema.

Discoid Lupus Erythematosus (DLE) is an autoimmune disorder that usually occurs on sun exposed areas of head and neck. Infrequently it could be presented by palpebral involvement and rarely unilateral upper eye lid edema and erythema have been reported as the sole manifestation of DLE. We describe a 38-year-old woman with chronic left upper eye lid edema and erythema from one year ago which was induced by steroid injection for left eyebrow alopecia. Histopathologic and direct immunofluorescent studies were made on palpebral skin tissue and confirmed DLE diagnosis. Antinuclear antibody (ANA) titer was 1/160 with speckled pattern. She was treated by oral hydroxychloroquine (400 mg daily) with moderate improvement after three months. We should think about DLE in cases with chronic upper eye lid edema and erythema. The aim of this case report is to emphasize that ophthalmologist and dermatologists should be aware of different presentations of DLE in the periorbital area to prevent misdiagnosis.

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#28918421   2017/09/17 Save this To Up

Macrophage activation syndrome at the onset of glucocorticoid-resistant systemic lupus erythematosus: a case report.

Macrophage activation syndrome (MAS) is a life-threatening hyperinflammatory state mediated by uncontrolled cytokine storm and haemophagocytosis. Although rarely reported, MAS might occur in systemic lupus erythematosus (SLE), notably as an inaugural manifestation. Glucocorticoids (GCs) are the cornerstone of SLE therapy. However, in some cases high doses of GCs are required to achieve remission (i.e. glucocorticoid-resistance), leading to significant side effects.

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#28911789   2017/09/15 Save this To Up

A retrospective study of pregnancy-associated atypical hemolytic uremic syndrome.

Pregnancy-associated atypical hemolytic uremic syndrome (aHUS) refers to the thrombotic microangiopathy resulting from uncontrolled complement activation during pregnancy or the postpartum period. Pregnancy-associated aHUS is a devastating disease for which there is a limited clinical understanding and treatment experience. Here we report a retrospective study to analyze the clinical and prognostic data of 22 cases of pregnancy-associated aHUS from the Spanish aHUS Registry under different treatments. Sixteen patients presented during the first pregnancy and as many as nine patients required hemodialysis at diagnosis. Identification of inherited complement abnormalities explained nine of the 22 cases, with CFH mutations and CFH to CFHR1 gene conversion events being the most prevalent genetic alterations associated with this disorder (66%). In thirteen of the cases, pregnancy complications were sufficient to trigger a thrombotic microangiopathy in the absence of genetic or acquired complement alterations. The postpartum period was the time with highest risk to develop the disease and the group shows an association of cesarean section with pregnancy-associated aHUS. Seventeen patients underwent plasma treatments with a positive renal response in only three cases. In contrast, ten patients received eculizumab with an excellent renal response in all, independent of carrying or not inherited complement abnormalities. Although the cohort is relatively small, the data suggest that pregnancy-associated aHUS is not different from other types of aHUS and suggest the efficacy of eculizumab treatment over plasma therapies. This study may be useful to improve prognosis in this group of aHUS patients.

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#28899840   2017/09/13 Save this To Up

Estimation of seasonal influenza vaccine effectiveness using data collected in primary care in France: comparison of the test-negative design and the screening method.

In this study we discuss which method between the test-negative design and the screening method could provide more robust real-time and end-of-season vaccine effectiveness estimates, using data collected from routine influenza surveillance in primary care.

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#28895470   2017/09/12 Save this To Up

GENERATION OF A CLOSE-TO-NATIVE IN VITRO SYSTEM TO STUDY LUNG CELLS-ECM CROSSTALK.

Extracellular matrix (ECM) is an essential component of the tissue microenvironment, actively shaping cellular behavior. In vitro culture systems are often poor in ECM constituents thus not allowing for naturally occurring cell-ECM interactions. This study reports on a straightforward and efficient method for generation of ECM scaffolds from lung tissue and its subsequent in vitro application using primary lung cells. Mouse lung tissue was subjected to decellularization with 0.2% sodium dodecyl sulfate, hypotonic solutions and DNase. Resultant ECM scaffolds were devoid of cells and DNA while lung ECM architecture of alveolar region and blood and airway networks were preserved. Scaffolds were predominantly composed of core ECM and ECM-associated proteins such as collagens I-IV, nephronectin, heparan sulfate proteoglycan core protein, lysyl oxidase homolog 1, among others. When homogenized and applied as coating substrate, ECM supported the attachment of lung fibroblasts in a dose-dependent manner. Following ECM characterization and biocompatibility tests, a novel in vitro platform for 3D matrix repopulation that permits live-imaging of cell-ECM interactions, was established. Using this system, lung fibroblasts colonized the ECM scaffolds, displaying a close-to-native morphology in intimate interaction with the ECM fibers, and showed nuclear translocation of the mechanosensor YAP, when compared to cells cultured in 2D. In conclusion, we developed a 3D culture system, by combining an efficient decellularization method with a live-imaging culture platform, to replicate in vitro native lung cell-ECM crosstalk. This is a valuable system that can be easily applied to other organs for ECM-related drug screening, disease-modelling and basic mechanistic studies.

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#28894082   2017/09/12 Save this To Up

Chronic Inflammatory Demyelinating Polyneuropathy (CIDP): An Uncommon Manifestation of Systemic Lupus Erythematosus (SLE).

BACKGROUND Chronic inflammatory demyelinating polyneuropathy (CIDP) is an uncommon manifestation of systemic lupus erythematosus (SLE). We report a case of SLE presenting as CIDP and discuss the diagnosis, management, and prognosis of CIDP. CASE REPORT A 40-year-old woman with a past medical history of SLE treated with hydroxychloroquine presented with bilateral, progressive, ascending, sensory and motor neuropathy. Physical examination showed weakness and reduced temperature of all extremities, reduced pinprick and vibration sense of the distal extremities, loss of reflexes, and walking with a wide-based unsteady gait. Laboratory investigations showed positive antinuclear antibodies (ANA), anti-(smooth muscle (SM) antibody, anti-RNP antibody, anti-SSA antibody, anti-ds-DNA antibody, and an erythrocyte sedimentation rate (ESR) of 75 mm/hr, low C4, leukopenia, and anemia. Electromyography (EMG) confirmed the diagnosis of CIDP. The patient's neuropathy and muscle weakness improved on treatment with intravenous immunoglobulin (IVIG) and high-dose steroids. CONCLUSIONS The early clinical diagnosis of CIDP, supported by serological autoantibody profiles associated with SLE, can predict a good response to steroids. Most patients with CIDP are treated successfully with steroids if the diagnosis is made early. IVIG, plasmapheresis, or immunosuppressive therapy should be considered if there is no response to steroids.

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#28876029   2017/09/06 Save this To Up

[Bioassay-guided isolation of functional components from hot water extract of Chlorella pyrenoidosa].

The main functional ingredients of hot water extract of Chlorella pyrenoidosa (CPE) were investigated through a bioassay-guided fractionation based on free radical scavenging and macrophage proliferation effects. The main functional ingredients of CPE were polysaccharides (PS) that were isolated by high pressure extraction, Sevag method, ethanol precipitation and ultrafiltration separation. Crude polysaccharides were further separated and purified by ion exchange chromatography DEAE52 and size exclusion chromatography Sephadex G-100. The purified fractions were analyzed by gel permeation chromatography. Molecular weights of the purified fractions PS-1-4-2, PS-1-3-2 and PS-2-3-3 were 3.97×10⁴, 2.28×10⁴ and 4.1×10³ Da, respectively. Bioassay-guided fractionation results indicated that CPE could remove free radicals and promote Ana-1 cells proliferation, mainly due to its various components working together. The components of free radicals scavenging mainly concentrated in PS-1-3, PS-1-4, PS-2-3 and PS-2-4. The components of Ana-1 proliferation mainly concentrated in PS-1-3, PS-1-4 and PS-2-3. This study established the activity screening method of main functional component from CPE, and got three new functional ingredients. It can be used to guide the development of high value products, further promote the industrialization process of microalgae energy, and realize microalgae 'high value products, microalgae energy and microalgae carbon' integration of exemplary role.

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#28869560   2017/09/04 Save this To Up

Targeting PDE10A GAF Domain with Small Molecules: A Way for Allosteric Modulation with Anti-Inflammatory Effects.

Phosphodiesterase (PDE) enzymes regulate the levels of cyclic nucleotides, cAMP, and/or cGMP, being attractive therapeutic targets. In order to modulate PDE activity in a selective way, we focused our efforts on the search of allosteric modulators. Based on the crystal structure of the PDE10A GAF-B domain, a virtual screening study allowed the discovery of new hits that were also tested experimentally, showing inhibitory activities in the micromolar range. Moreover, these new PDE10A inhibitors were able to decrease the nitrite production in LPS-stimulated cells, thus demonstrating their potential as anti-inflammatory agents.

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#28857716   2017/08/31 Save this To Up

Chronic cutaneous lupus erythematosus presenting as atypical acneiform and comedonal plaque: case report and literature review.

Introduction Chronic cutaneous lupus erythematosus (CCLE) usually presents as characteristic erythematous patches and infiltrated coin-shaped plaques. However, there are some atypical clinical variants that may mimic other dermatological conditions. Haroon et al. reported in 1972 an unusual presentation of CCLE with hypertrophic follicular scars seen in acne vulgaris. Acneiform presentation is one of the most rarely reported and one of the most confusing, as it resembles a very common inflammatory skin disease. A brief review of the literature using PubMed found only nine other reports. Case report A 32-year-old woman presented with two-year pruritic infiltrated acneiform and comedonal eruption on the right chin treated as acne with isotretinoin without improvement. On examination the patient presented with erythematous-infiltrated plaque, papules, open comedones, pitting scars and hypopigmented atrophic scars on the right chin area and scalp hair loss. An incisional skin biopsy on the chin and scalp lesions was performed and the anatomopathological and immunofluorescence exam showed findings that are consistent with CCLE. Additional tests ruled out systemic involvement. The patient was treated with prednisone and chloroquine diphosphate with great improvement. After four years the lesion is stable, with some scarring. Discussion In a literature review we found nine other cases of acneiform presentation of lupus erythematosus: Three cases were systemic lupus erythematosus (SLE) and seven others were diagnosed as CCLE (including our patient). All three patients who had SLE tested positive for antinuclear antibodies (ANA), and only one patient with CCLE, had a low titer of positive ANA (1:80). Ages varied from 24 to 60 years old, with a median of 32 years old, the same as our patient's age and consistent with the literature. Seven were females and three were males, with a ratio of 2.3:1. Most cases, such as our patient, showed acneiform lesions mainly on the face, a common site of typical CCLE. The present case and literature review illustrates the need to expand the differential diagnosis of atypical acneiform and comedonal lesions. CCLE should be considered especially in a localized lesion, which can be itchy and does not improve with conventional treatment for acne vulgaris.

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#28848653   2017/08/29 Save this To Up

Automated evaluation of ANA under real-life conditions.

Visual evaluation of indirect immunofluorescence (IIF) on human epithelial-2 cells is the routine method for screening for antinuclear antibodies (ANA) in connective tissue diseases. Since visual IIF is time-consuming and subjective, automated IIF processors have been developed to offer standardised, valid and cost-efficient IIF assays.

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