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Biomedical subjects

J Lloveras

Publications and source records attributed to J Lloveras.

At least 55 records · Page 3Linked to original sources
PubMed1991

[Hepatic fascioliasis. Uncommon cause of prolonged febrile syndrome with hypereosinophilia and hypodense images on computed tomography of the liver].

A 40 year old man was admitted with prolonged fever, hypereosinophilia, increased serum levels of cholestasis enzymes and low density masses in the hepatic computed tomography (CT). A liver needle biopsy was performed under CT control. Neoplastic, pyogenic or amoebic etiology were excluded. Stool parasitologic examination was also negative. A diagnosis of hepatic fasciolasis was based on the finding of operculate eggs in duodenal juice obtained by duodenal aspiration. The patient was successfully treated with triclabendazole (10/mg/kg/single dose). The purpose of this communication is to emphasize 1) that prolonged fever with hypereosinophilia and focal lesions in hepatic CT suggest the presence of fasciola hepatica which must be investigated particularly in duodenal juice; 2) the CT aspects of this disease; 3) that triclabendazole, a benzimidazolic compound, is a new therapeutic possibility acting on immature and adult forms of the parasite in the liver.

Adult↗
PubMed1988

Structure of d(CACGTG), a Z-DNA hexamer containing AT base pairs.

The left-handed Z-DNA conformation has been observed in crystals made from the self-complementary DNA hexamer d(CACGTG). This is the first time that a non disordered Z form is found in the crystal structure of an alternating sequence containing AT base pairs without methylated or brominated cytosines. The structure has been determined and refined to an agreement factor R = 22.9% using 746 reflections in the resolution in the resolution shell 7 to 2.5 A. The overall shape of the molecule is very similar to the Z-structure of the related hexamer d(CG)3 confirming the rigidity of the Z form. No solvent molecules were detected in the minor groove of the helix near the A bases. The disruption of the spine of hydration in the AT step appears to be a general fact in the Z form in contrast with the B form. The biological relevance of the structure in relation to the CA genome repeats is discussed.

Adenine↗
PubMed1988

Osteodystrophy of diabetics in chronic dialysis: a histomorphometric study.

A decreased incidence of hyperparathyroidism in diabetic uremic patients has been reported, but comprehensive bone histomorphometric studies on uremic diabetic osteodistrophy are scarce. We present here the results of static and dynamic bone morphometry in 13 diabetic patients on dialysis (DCD) and their comparison with a pair-matched group of nondiabetic uremics with similar age, sex, and time on dialysis (NCDC), and with a group of 17 normals (N). Diabetic bone showed: (1) Low trabecular volume (Vt 9.9% in DCD and 22.8% in N), (2) Moderately increased remodeling values of intermediate intensity between N and NDCD values (Sf = 19.3% in DCD, 37.4% in NDCD, and 8.8 +/- 6% in N, Sr = 4.3% in DCD, 7.3% in NDCD and 2.04 +/- 0.9% in N), and (3) Moderate fibrosis (Sfib 1.2% in DCD, 12.9% in NDCD). Besides these confirmatory results, two suggestions emerged from the study: (1) The relative number of cells: osteoclast density (OI) and osteoblasts (Ob/OID) appears to be lower, not only than NDCD values but also lower than N values (OI = 0.04 c/mm. in DCD, 0.31 in NDCD, and 0.14 in N; Ob/OID = 5.58% in DCD, 14.6 in NDCD and 22.12 +/- 9% m N). (2) Dynamic behavior in tetracycline based studies disclosed the appearance of two populations of DCD: a subgroup of preserved calcification dynamics with values not quite different than the NDCD group and a subgroup with a significant derangement of mineralization with no measurable bone trabecular dynamics. This late subgroup also showed significantly lower number of Ob/OID values compared with the former with preserved calcification.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗