RESUMEN
<p><b>AIM</b>To evaluate the occurrence and prevalence of microdeletions in the gamma chromosome of patients with azoospermia.</p><p><b>METHODS</b>DNA from 29 men with idiopathic azoospermia was screened by polymerase chain reaction (PCR) analysis with a set of gamma chromosome specific sequence-tagged sites (STSs) to determine microdeletions in the gamma chromosome.</p><p><b>RESULTS</b>Deletions in the DAZ (deleted in azoospermia) loci sgamma254 and sgamma255 were found in three patients with idiopathic azoospermia, resulting in an estimated frequency of deletions of 10.7% in idiopathic azoospermia men.</p><p><b>CONCLUSION</b>We conclude that PCR analysis is useful for the diagnosis of microdeletions in the Y chromosome, which is important when deciding the suitability of a patient for assisted reproductive technology such as testicular sperm extracion-intracytoplasmic sperm injection (TESE-ICSI).</p>
Asunto(s)
Adulto , Humanos , Masculino , Secuencia de Bases , Cromosomas Humanos Y , Cartilla de ADN , Eucromatina , Genética , Hormona Folículo Estimulante , Sangre , Heterocromatina , Genética , Hormona Luteinizante , Sangre , Oligospermia , Sangre , Genética , Reacción en Cadena de la Polimerasa , Prolactina , Sangre , Eliminación de Secuencia , Genética , Lugares Marcados de Secuencia , Testosterona , SangreRESUMEN
<p><b>AIM</b>Chromosome 13 is one of the most frequently altered chromosomes in prostate cancer. The present study was undertaken to examine the role of human chromosome 13 in the progression of prostate cancer.</p><p><b>METHODS</b>Human chromosome 13 was introduced into highly metastatic rat prostate cancer cells via microcell-mediated chromosome transfer.</p><p><b>RESULTS</b>Microcell hybrid clones containing human chromosome 13 showed suppression of metastasis to the lung without any suppression of tumorigenicity, except for one clone, which contained the smallest sized human chromosome 13 and did not show any suppression on lung metastasis. Expression of two known tumor suppressor genes, BRCA2 and RB1, which map to chromosome 13, was examined by reverse transcription- polymerase chain reaction analysis. BRCA2 was expressed only in the metastasis-suppressed microcell-hybrid clones, whereas RB1 was expressed in all clones.</p><p><b>CONCLUSION</b>Human chromosome 13 contains metastasis suppressor gene(s) for prostate cancer derived from rat. Furthermore, the RB1 gene is unlikely to be involved in the suppression of metastasis evident in this system.</p>