Publications by authors named "Manuela Alvarez"

Hb F production is under the influence of major quantitative trait loci (QTL). The present study aims: i) to replicate the association with Hb F for representative genetic variants in the three major Hb F QTLs in a Portuguese sample of β-thalassemia (β-thal) carriers; and ii) to test different genetic multi-locus models to account for the genetic component of Hb F variation. A population sample of 79 Portuguese β-thal carriers (39 males, 40 females), aged between 2 to 70 years old, were genotyped for polymorphisms in the locus control region (LCR)-5' hypersensitive site 4 (5'HS4) rs16912979, I- rs7482144, rs1427407 and HMIP rs66650371, using standard biomolecular procedures.

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A population based case-control study was conducted in Portuguese women with overweight/obesity to investigate the possible association of variants in genes FTO, SLC6A4, DRD2, BDNF and GHRL with binge eating disorder (BED). The distribution of seven polymorphisms was evaluated in 31 BED patients and 62 controls. No significant associations were found between polymorphisms and BED.

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Background: The - 13910C>T polymorphism has been associated with lactase persistence (LP) in European populations.

Aim: To assess - 13910C>T genotypes across Portugal and in adult individuals with unspecific gastrointestinal complaints associated with milk consumption.

Subjects And Methods: This study genotyped - 13910C>T in the general population from Northern (n = 64), Central (n = 70) and Southern (n = 65) Portugal and in 40 subjects with gastrointestinal symptoms.

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Article Synopsis
  • Ferroportin is crucial for iron export and the Q248H mutation, common in people of African descent, was analyzed in three West African populations to better understand its frequency.
  • The study examined samples from S. Tomé e Príncipe, Angola, and Republic of Guinea, discovering Q248H frequencies of 2.2%, 3.5%, and 4.1%, respectively.
  • Results indicate a strong association between the Q248H mutation and specific genetic markers, suggesting a common origin of the mutation in these sub-Saharan populations.
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