ABSTRACT
Microdeletions in Yq are associated with defects in spermatogenesis, while those in the AZF region are considered critical for germ cell development. We examined microdeletions in the Y chromosomes of patients attended at the Laboratory of Human Reproduction of the Clinical Hospital of the Federal University of Goiás as part of a screening of patients who plan to undergo assisted reproduction. Analysis was made of the AZF region of the Y chromosome in men who had altered spermograms to detect possible microdeletions in Yq. Twenty-three patients with azoospermia and 40 with severe oligozoospermia were analyzed by PCR for the detection of six sequence-tagged sites: sY84 and sY86 for AZFa, sY127 and sY134 for AZFb, and sY254 and sY255 for AZFc. Microdeletions were detected in 28 patients, including 10 azoospermics and 18 severe oligozoospermics. The patients with azoospermia had 43.4% of their microdeletions in the AZFa region, 8.6% in the AZFb region and 17.4% in the AZFc region. In the severe oligozoospermics, 40% were in the AZFa region, 5% in the AZFb region and 5% in the AZFc region. We conclude that microdeletions can be the cause of idiopathic male infertility, supporting conclusions from previous studies.
Subject(s)
Humans , Male , Chromosomes, Human, Y/ultrastructure , Chromosome Deletion , Gene Deletion , Infertility, Male/genetics , Azoospermia/genetics , Brazil , Germ Cells/metabolism , Spermatogenesis , Fertility , Polymerase Chain ReactionABSTRACT
Neste estudo avaliou-se o efeito da radiaçao ionizante em 12 coelhas (65 embrioes), em três diferentes momentos da gravidez: no momento do cruzamento / ovulaçao (hora zero), dois dias após e quatro dias após, com duas diferentes doses de irradiaçao: 5 cGy e 1O cGy. Seis coelhas (36 blastocistos) foram usadas como controles. O momento do cruzamento foi considerado a hora "zero". Após seis dias (ñ 60 minutos), os embrioes de cada coelha foram obtidos por lavagem do útero com meio de cultura. Os embrioes foram fixados em metanol por 48 horas, e corados com hematoxilina ácida de Mayer. Os seguintes parâmetros foram estudados: a - índice mitótico; b - malformaçoes do pólo embrionário. Nao se encontrou malformaçoes grosseiras do pólo embrionário. O índice mitótico foi alterado tanto pelo momento quanto pela dose irradiada.