Biomedical subjects

Antonio Fraga

Publications and source records attributed to Antonio Fraga.

3 recordsLinked to original sources

PubMed2003

Maternal age and family history are risk factors for ankylosing spondylitis.

OBJECTIVE: To investigate prevalence and gender distribution in parents of children with ankylosing spondylitis (AS). METHODS: Family history of AS (parents, uncles, and aunts), maternal age at delivery, and consecutive pregnancy number were assessed in the relatives of 40 Mexican Mestizo patients with definite AS (New York Criteria). RESULTS: We evaluated the family history of AS in 34 families of 40 AS patients; 12 with none, 4 with a paternal history (4 healthy fathers with a brother with AS) (odds ratio, OR, 1.37, p = 0.75), 15 with a maternal history of AS, (15 healthy mothers with a brother with AS) (OR 1.4, p = 0.55), and 3 with both lines (OR 0.84, p = 0.92). In these families AS was more frequent in males (29%) than in females (10%), OR 3.40 (95% confidence interval, CI: 1.43-8.29, p = 0.003). Juvenile onset was more common in the offspring of mothers with family history (72%) (OR 13.0, 95% CI: 1.68-147.48, p = 0.009). The number of first-born children with AS (18%) was similar to the later-born children (23%) (OR 1.37, 95% CI: 0.38-5.31, p = 0.78). The frequency of AS increased when the maternal age at delivery was < or = 30 years (OR 0.20, 95% CI: 0.04-0.75, p = 0.01). CONCLUSION: In Mexican Mestizo patients, there is no correlation between the risk for AS and the gender of the affected parent. However we found an association between juvenile onset and maternal family history with an increased incidence in patients with younger mothers.

Adolescent↗

PubMed2002

Takayasu's arteritis.

The frequency of Takayasu's arteritis (TA) has been estimated to be 2.9 cases per 1 million people, with a female preponderance, although female-to-male ratio varies from different geographic areas. A high frequency of haplotype A24-B52-DR2 has been found in Japanese patients, without this association in other populations. TA has a striking predilection for the aortic arch and its branches. Evidence favors an autoimmune pathogenesis. Segmental inflammation (active and inactive lesions) may coexist. Due to its enhanced resolution, magnetic resonance imaging and magnetic resonance angiography eventually will replace catheterization angiography. Mortality reduction with glucocorticoid treatment has not been firmly established.

Adolescent↗

PubMedDate not supplied

[Risk factors associated with systemic lupus erythematosis in a Mexican population].

OBJECTIVE: To assess risk factors associated with systemic lupus erythematosus (SLE) in the Mexican population. MATERIAL AND METHODS: A case-control study was conducted on June 1996, at the Reumathology Clinic of Hospital de Especialidades del Centro Médico Nacional Siglo XXI (HE CMN), Instituto Mexicano del Seguro Social, in Mexico City. Cases were one hundred thirty subjects with four or more SLE criteria and disease evolution of +/- 5 years. Controls were hospitalized patients with acute diseases but without autoimmune diseases. Cases and controls were matched 1:1 by age and gender; both groups were evaluated by direct interview through a structured questionnaire. The following risk factors were assessed: genetic family history of SLE and connective tissue disease; socioedemographic (ethnicity, geographic distribution, education, monthly income); hormonal (use of oral contraceptives, replacement therapy and gynecoobstetric background); environmental (use of hair products, living with dogs, bacterial/viral infections, and allergies). Statistical analysis consisted of odd ratios (OR) with 95% confidence intervals (CI) and multivariate analysis using logistic regression. RESULTS: The multivariate model showed association with family history of SLE (OR 4.2, CI 95% 1.17-15.2), family history of connective tissue disorder (OR 2.6, CI 95% 1.15-4.5), use of oral contraceptives for more than one year (OR 2.1, CI 95% 1.13-4.3), repetitive pharyngitis (OR 2.1, CI 95% 1.18-3.6), and use of medications (OR 5.0 IC 95% 1.62-21.6). No association was found with socieconomic status, hair dye products, asthma, or allergies. CONCLUSIONS: Genetic factors, such as family history of SLE and connective tissue disease in first-degree relatives, persist as important factors in the development of SLE. Other factors, such as use of some drugs, oral contraceptives, and repetitive pharyngitis, may also favor the onset of disease in genetically susceptible hosts. The English version of this paper is available at: http://www.insp.mx/salud/index.html.

Adult↗