Drug survival and postdrug survival of first-line immunosuppressive treatments for atopic dermatitis: comparison between methotrexate and cyclosporine.

INTRODUCTION: Cyclosporine and methotrexate are the two preferred first-line immunosuppressive treatments in atopic dermatitis. The aim of this study was to compare the treatment profiles of methotrexate and cyclosporine in daily practice as the first-line immunosuppressive treatment in atopic dermatitis, using two survival analyses, 'drug survival' (time on the drug) and 'postdrug survival' (time between two drugs). METHODS: Retrospective study including patients with moderate-to-severe atopic dermatitis treated with methotrexate or cyclosporine as the first-line immunosuppressive treatment. The reasons for discontinuation of treatment were collected as follows: controlled disease, treatment failure, side event pregnancy and non-compliance. 'Drug survival' and 'postdrug survival' analyses were performed using the Kaplan-Meier method and predictive factors were analysed using uni- and multivariate Cox regression analyses. RESULTS: Fifty-six patients, among whom 25 patients treated with cyclosporine and 31 with methotrexate (median age: 34 ± 15 years), were included between 2007 and 2016. Reasons for discontinuation were not significantly different between 'controlled disease' and other reasons (P = 0.11). The median 'drug survival' was significantly longer for methotrexate (23 months) than for cyclosporine (8 months) (P < 0.0001). Six months from baseline, 93% of patients treated with methotrexate were still being treated vs 63% among patients treated with cyclosporine. The median of 'postdrug survival' was significantly longer for methotrexate (12 months) than for cyclosporine (2 months). Only treatment with CYC was a predictive factor for decreased 'drug survival' and 'postdrug survival'. CONCLUSION: This is the first direct comparison between methotrexate and cyclosporine as first-line immunosuppressive treatments for moderate-to-severe atopic dermatitis in daily practice. We evidenced two different treatment profiles: the duration of methotrexate administration is longer than that of cyclosporine. 'Postdrug survival' could be a new tool to assess the maintenance of effect of a drug after withdrawal in atopic dermatitis, and more broadly in chronic skin disease.

Inelastic electron tunneling spectroscopy of difurylethene-based photochromic single-molecule junctions.

Diarylethene-derived molecules alter their electronic structure upon transformation between the open and closed forms of the diarylethene core, when exposed to ultraviolet (UV) or visible light. This transformation results in a significant variation of electrical conductance and vibrational properties of corresponding molecular junctions. We report here a combined experimental and theoretical analysis of charge transport through diarylethene-derived single-molecule devices, which are created using the mechanically controlled break-junction technique. Inelastic electron tunneling (IET) spectroscopy measurements performed at 4.2 K are compared with first-principles calculations in the two distinct forms of diarylethenes connected to gold electrodes. The combined approach clearly demonstrates that the IET spectra of single-molecule junctions show specific vibrational features that can be used to identify different isomeric molecular states by transport experiments.

An electrically actuated molecular toggle switch.

Molecular electronics is considered a promising approach for future nanoelectronic devices. In order that molecular junctions can be used as electrical switches or even memory devices, they need to be actuated between two distinct conductance states in a controlled and reproducible manner by external stimuli. Here we present a tripodal platform with a cantilever arm and a nitrile group at its end that is lifted from the surface. The formation of a coordinative bond between the nitrile nitrogen and the gold tip of a scanning tunnelling microscope can be controlled by both electrical and mechanical means, and leads to a hysteretic switching of the conductance of the junction by more than two orders of magnitude. This toggle switch can be actuated with high reproducibility so that the forces involved in the mechanical deformation of the molecular cantilever can be determined precisely with scanning tunnelling microscopy.

[Wells syndrome mimicking facial cellulitis: Three cases]. / Syndrome de Wells mimant une cellulite infectieuse de la face : trois observations.

BACKGROUND: Wells syndrome, or eosinophilic cellulitis, is an uncommon inflammatory dermatosis of unknown etiology that is characterized by clinical features of pruritic cellulitis-like plaques on the extremities and a histological picture of eosinophilic infiltrate of the dermis with "flame figures". PATIENTS AND METHODS: Herein, we report three cases of idiopathic Wells syndrome masquerading as bacterial facial cellulitis. Under treatment with oral prednisone and/or combined therapy with levocetirizine and hydroxyzine, all patients showed a dramatic improvement of their skin lesions. DISCUSSION: These cases highlight the need to consider Wells syndrome in the differential diagnosis when evaluating a patient with facial cellulitis that does not respond to an initial antimicrobial regimen. In addition, our cases suggest that combined therapy with levocetirizine and hydroxyzine may be successfully used as first-line therapy or to prevent relapse after discontinuation of corticosteroid treatment.

[Meningococcemia without meningitis: A report of two cases]. / Méningococcémie sans méningite: à propos de deux observations.

INTRODUCTION: Meningococcemia without meningitis is an often under recognized clinical form of invasive Neisseria meningitidis infection. CASE REPORTS: We report two unusual cases of invasive meningococcal disease who presented with meningococcemia without distinct signs of meningitis or severe sepsis manifestation. In both cases, confirmation of the diagnosis is provided by meningococcal PCR performed on blood or skin lesion biopsy. CONCLUSION: Clinical recognition of this entity is crucial for early antibiotic treatment and to avoid delayed diagnosis and potentially dangerous complications.

Cutaneous aseptic neutrophilic abscesses and Yersinia enterocolitica infection in a case subsequently diagnosed as Crohn's disease.

We report the case of a man who presented cutaneous aseptic abscesses, a rare form of neutrophilic disease, associated with Yersinia enterocolitica infection and who was later diagnosed as having Crohn's disease (CD). Genetic analysis showed that the patient had a mutation in the caspase activation recruitment domain 15/nucleotide oligomerization domain 2 gene (R702W heterozygote). This case is in keeping with recent evidence in the literature which suggests that CD is a disease linked to abnormal immune responses to enteric bacteria in genetically susceptible individuals. Further understanding of the innate immune system should provide new insights into the pathogenesis of these inflammatory diseases.

[Survey in 2000: 3 cases]. / Scorbut en l'an 2000: 3 cas.

BACKGROUND: We report three new cases of patients presenting scurvy. In the year 2000 this rare disease still occurs in France. CASE REPORTS: The three patients, 2 men and a woman respectively 51, 50, and 73 years-old were alcoholics, and lived alone in difficult social conditions. Dietary survey indicated in the 3 cases inadequate vitamin C intake, and a regimen including solely bread, rice, pasta, and packet soup devoid of fresh vegetables and fruit. The cutaneous findings attributed to scurvy were: in the first patient, a woody inflammatory and painful oedema of the left leg associated with perifollicular petechial haemorrhages over the lower limbs, and hyperpigmentation of the facial skin with slate-gray spotty pigmentation of the tongue (pseudo-addisonian hyperpigmentation); in the second patient, an accentuation of a pre-existing acne becoming more inflammatory and extensive; and in the third patient, a diffuse petechial eruption on the abdomen and lower extremities. The diagnosis of scurvy was confirmed by low plasma ascorbic acid levels (< 6 mumol/l). All patients were treated with 1 to 2 g of oral ascorbic acid daily for 2 weeks resulting in rapid and dramatic response. DISCUSSION: Scurvy is a rare disease in industrialized nations. Its incidence is unknown because of absence of total census. Dietary vitamin C deficiency represents the main risk factor exposing for scurvy among adults, often alcoholics and living in social isolation. Cutaneous features supporting the diagnosis of scurvy are described in our observations. The recognition of these cutaneous abnormalities is important because their association can be misleading, and erroneously interpreted as a sign of systemic vasculitis, or connective tissue disease. The diagnosis of scurvy is confirmed by the measurement of plasma ascorbic acid levels. Treatment is simple and based on the administration of vitamin C, which results in dramatic improvement.

[Inpatient and outpatient follow-up of grade I malignant melanoma]. / Etude comparative du suivi des malades atteints de mélanome de stade Ien pratique libérale et hospitalière.

BACKGROUND: In 1995, the French consensus conference on management of patients with grade I malignant melanoma recommended clinical examination for patient monitoring. To date, only one survey has been conducted to evaluate these recommendations and their consequences, providing no means of assessing follow-up practices. The aim of this study was to assess follow-up practices in patients with grade I malignant melanoma followed in an outpatient private practice setting and in a hospital setting with regular appointments. PATIENTS AND METHODS: This retrospective study was conducted in collaboration with private practice and hospital dermatologists, all members of an association of continuing medical education. Medical records of 584 patients with grade I malignant melanoma who had undergone surgery between January 1, 1991 and December 31, 1995 were reviewed. Three hundred twenty-nine patients were followed in an exclusively outpatient setting by their private dermatologist and 265 were followed in a hospital setting. Follow-up data were: age, sex, date of surgical excision of the melanoma, Breslow thickness, date of each follow-up visit, presence of possible metastases and mode of diagnosis. RESULTS: Patient features were different in the two groups: mainly greater Breslow thickness and more frequent metastatic course in patients followed in a hospital setting. Among all patients, 65 (11 p. 100) developed metastases. Diagnosis of metastasis was made clinically in 95 p. 100 whatever the mode of monitoring considered. The number of patients lost to follow-up was 11p. 100 among those followed in a hospital setting and 42 p. 100 in those followed in a private practice setting. Patients lost to follow-up had a higher risk of developing metastasis as their average Breslow thickness was 1.7 mm. CONCLUSION: This study shows that patients followed in a hospital setting have a more severe prognosis than patients followed in private practice. It confirms that systematic use of complementary tests is of little interest in detecting metastases since over the period considered, the diagnosis of metastasis was made clinically in most cases. It also discloses difficulties encountered in exclusively outpatient follow-up as a high number of patients were lost to follow-up in this setting. A systematic appointment fixed by the private dermatologist during the follow-up period appears to be needed to ensure good quality follow-up. Such an appointment system should help reduce the number of patients lost to follow-up.

[Light and heavy chain deposition disease with cutaneous and renal manifestations]. / Maladie des dépôts de chaînes lourdes et légères avec manifestations cutanées et rénales.

INTRODUCTION: Monoclonal light and heavy chain deposition disease is a rare syndrome distinct from light chain amyloid, which is defined by the presence of monoclonal deposits of immunoglobulins in various tissues. CASE-REPORT: A 65-year-old man presented with renal symptoms due to membranoproliferative glomerulonephritis, associated with urticarial papules located on the arms and back. Histological examination of a skin biopsy specimen showed lymphocytic vasculitis. Direct immunofluorescence examination of kidney and skin lesions using anti-gamma 2 and anti-Kappa monoclonal antibodies, showed a similar staining on the basement membrane zone and vessel walls. COMMENTS: As far as we know, this is the first documentation of monoclonal light and heavy chain deposition disease associated with a lymphocytic skin vasculitis and renal involvement caused by similar monoclonal deposits of immunoglobulins in the kidney and skin.

[Melkersson-Rosenthal syndrome treated by thalidomide. 2 cases]. / Syndrome de Melkersson-Rosenthal traité par le thalidomide. Deux observations.

INTRODUCTION: Treatment of Melkersson-Rosenthal syndrome (MRS) remains uncertain. Two cases of MRS treated with thalidomide are described. CASE REPORT: Two patients with cheilitis granulomatosa and recurrent facial edema have been treated with thalidomide (100 mg daily) for 3 and 6 months respectively. The efficacy of thalidomide was complete clinically and histologically in one case. In the second one, thalidomide suppressed attacks of facial edema and reduced lip swelling. COMMENTS: These cases suggest a therapeutic effect of thalidomide in MRS.