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Sindrome PFAPA in un bambino affetto da malattia di Lesch-Nyahn: descrizione di un caso.
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Latent coeliac disease in a child with epilepsy, cerebral calcifications, drug-induced systemic lupus erythematosus and intestinal folic acid transport across the blood-brain barrier
No full textA 15-year-old boy with epilepsy and cerebral calcifications, treated with valproic acid, ethyl phenylbarbiturate and ethosuximide, was referred for drug induced systemic lupus erythematosus. Anti-gliadin (AGA) and anti-endomysium (EMA) antibody tests were both positive (EMA titre 1:50). Endoscopic duodenal biopsy showed intense chronic inflammation without villous atrophy or crypt hyperplasia. The child was discharged with a gluten-containing diet. The follow-up showed an increase in EMA titre (1:200) and the persistence of AGA. After 15 months, a second endoscopic intestinal biopsy showed flat mucosa and villous atrophy. Three serum folic acid determinations showed 1.8, 2.4, 2.0 ng/ml (reference range 2.5-16.9 ng/ml) prior to the two intestinal biopsies, but returned to normal levels (11.8 ng/ml) after a gluten-free diet and oral supplementation together. Two years later, the frequency of epileptic seizures was unchanged despite ongoing anti-epileptic treatment and a gluten-free diet. As cerebral calcification and epilepsy are reminiscent of the findings in congenital folate malabsorption, oral loading tests with 5 mg folic acid were carried out and showed impaired intestinal absorption and a defect in the transport across the blood-brain barrier. Low CSF folate levels (13.9 and 12.6 ng/ml, reference range 15-40 ng/ml) and an alteration in the CSF/serum folate ratio (1.43 and 1.16, normal ratio 3:1) were also found as well as increased levels of cystathionine both in CSF (40 micromol/l, reference range 18-28 micromol/l) and in serum (32 micromol/l, reference value <0.10 micromol/l).
CONCLUSION:
Impairment of intestinal folic acid absorption with a defect in folic acid transport across the blood-brain barrier has been demonstrated in a case of epilepsy and cerebral calcifications associated with coeliac disease
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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