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Biomedical subjects

J Más

Publications and source records attributed to J Más.

10 recordsLinked to original sources
PubMed1993

7-Azetidinylquinolones as antibacterial agents. Synthesis and structure-activity relationships.

A series of novel antibacterial quinolones and naphthyridones has been prepared which contain 7-azetidinyl substituents in place of the usual piperazine or aminopyrrolidine groups. These azetidinyl derivatives were evaluated for in vitro activity by determining minimum inhibitory concentrations against a variety of bacteria. In vivo efficacy in the mouse infection model and blood levels in the mouse were determined for several compounds. The influence on the structure-activity relationships of varying substituents in the azetidine ring and at position 8 (CH, CF, CCl, N) and N-1 (ethyl, fluoroethyl, cyclopropyl, tert-butyl, 4-fluorophenyl, and 2,4-difluorophenyl) was also studied. Compounds with outstandingly broad-spectrum activity, particularly against Gram-positive organisms, improved in vivo efficacy, and high blood levels were identified in this work. 7-Azetidinyl-8-chloroquinolones were considered as warranting further development.

4-Quinolones↗
PubMed1990

Immature teratoma primary of the uterine cervix. First case report.

The extragonadal germ cell tumours represent 1-2% out of all the germ cell tumors. The retroperitoneal and the mediastinic spaces are the most common localizations. Visceral localizations are very infrequent. We present a case, the first described in literature, of immature teratoma of the uterine cervix in a 13 year old girl.

Adolescent↗
PubMed1989

Lipids and testicular function.

We studied 19 male patients with primary hyperlipoproteinaemia, a control group of 28 healthy men and 44 infertile males before any treatment was undertaken. Spermiogram, seminal biochemical studies, measurements of plasma hormone levels and lipid determinations were carried out. Most hyperlipoproteinaemic patients showed abnormalities in the spermiograms and the mean values were lower than in the controls except for semen volume. Seminal biochemical determinations were normal in the majority and the hormone profile showed some abnormal values, mainly for E2. Lipid abnormalities were more common in azoospermic infertile men and mean lipid levels were higher. Correlation studies suggest that high levels of C and/or Tg are associated with poor semen quality and higher FSH levels. The results of our studies suggest that high lipid levels exert adverse direct effects at the testicular level.

Adult↗
PubMed1989

Frequency of the ESD*5 allele in a Spanish population.

The red blood cell esterase D (ESD) polymorphism was studied by means of IEF in a North-East Spanish population (Barcelona). Gene frequencies in 430 unrelated individuals were ESD*1: 0.888, ESD*2: 0.091 and ESD*5: 0.021. Our data confirm previous results showing that ESD*5 occurs in polymorphic frequency and has a Caucasian origin.

Carboxylesterase↗
PubMed1988

Glyoxalase I polymorphism in Catalonia (Spain).

Blood samples from two Catalonian populations (North-East of Spain) were analysed for glyoxalase (GLO) I polymorphism. Gene frequencies of GLO1 (0.46 and 0.41) are comparable to those reported for Central-European Caucasoid populations.

Erythrocytes↗
PubMed1984

Testicular response to human chorionic gonadotrophin in men with non-tumoural hyperprolactinaemia.

The change in plasma levels of testosterone and oestradiol-17-beta following a single intramuscular injection of 6000 IU hCG was studied in 7 men with non-tumoural hyperprolactinaemia and who were without clinical and/or laboratory evidence of hypogonadotrophism. These values were compared to the response of normal males to hCG. Plasma samples were obtained at 0, 2, 4, 24, 48, 96, 144, 192 and 240 h after hCG injection. The early and late phases of the plasma testosterone to hCG in hyperprolactinaemic patients were comparable to those of the controls, although the maximum and relative increment was somewhat diminished (5.0 +/- 1.2 vs 7.2 +/- 2.1 ng/ml; P less than 0.05, and 1.8 +/- 0.2 vs 2.3 +/- 0.5 ng/ml; P less than 0.02, respectively). The plasma oestradiol response to hCG was not different between the two groups, but the maximum and relative incement was higher in the hyperprolactinaemic patients (135.9 +/- 20.6 vs 97.1 +/- 11.9 pg/ml; P less than 0.05, and 4.9 +/- 0.6 vs 3.1 +/- 0.5 pg/ml; P less than 0.01, respectively. These findings suggest that the testosterone response to exogenous gonadotrophin is impaired in patients with non-tumoural hyperprolactinaemia. Whether this impairment is related to the higher increment in plasma levels of oestradiol remains to be elucidated. The data presented favour the hypothesis that in hyperprolactinaemic men, the prolactin exerts a direct action at the testicular level.

Adult↗
PubMed1982

Semen analyses in men with asymptomatic genital gonorrhoea.

Thirty asymptomatic men with gonorrhoea were studied. No significant difference was seen in spermiogram (semen volume, sperm count, motility, velocity and normal morphology) and most of the seminal constituents studied (fructose, ascorbic acid, calcium, sodium, potassium, chlorides and magnesium) between this group of men and those of a normal control group. Citric acid levels were significantly lower in men with gonorrhoea (P less than 0.002). suggesting a non-acute prostatitis. No significant difference was observed in the studies before and after treatment.

Adult↗
PubMedDate not supplied

Semen analyses in adolescent diabetic patients.

We studied the semen quality and plasma testosterone levels (T) in 32 adolescent patients with insulin-dependent diabetes mellitus and in an aged-matched control group. Semen volume, motility and morphology were significantly lower in diabetics whereas seminal fructose and glucose were significantly higher. Even though the sperm count was lower in these adolescent diabetics, the difference was not significant when compared to the control group. No difference was observed in plasma testosterone levels. Patients were divided into two groups according to the presence of retinopathy and neuropathy, and degree of metabolic control. Spermiogram parameters, seminal fructose and glucose were lower in diabetics with neuropathy. No difference was observed in spermiogram parameters between diabetic patients with or without retinopathy, but seminal fructose, and glucose were lower in the former. All spermiogram parameters, as well as seminal fructose were lower in diabetics with poor metabolic control but seminal glucose was higher. No correlation was detected between clinical parameters (age at onset and duration of diabetes mellitus and time since first ejaculation), semen parameters, plasma T, glycemia and glycosuria. In conclusion, a deterioration of the quality of human semen occurs in adolescent diabetic patients. Neuropathy and poor metabolic control seem to be important factors of this deterioration. The presence of retinopathy does not correlate with T and semen quality.

Adolescent↗
PubMedDate not supplied

Familial bilateral vas deferens agenesis.

Two brothers with bilateral vas deferens agenesis are described, one of them with a chromosome mosaicism (46,XX/47,XXY). To our knowledge, there are not any previous reports of both conditions existing simultaneously. The patients consulted us because of infertility; they have normal sexual function, normal physical examination, but typical semen analyses with azoospermia, low semen volume, low pH, and negative fructose test. It appears to us that bilateral vas deferens agenesis may be genetic in origin in some patients.

Adult↗