Microdeletions of the Y chromosome and intracytoplasmic sperm injection: from gene to clinic.
نویسندگان
چکیده
Intracytoplasmic sperm injection (ICSI) is a successful treatment option for severe male infertility, although the aetiology of the disorder remains unclear in most cases. Recently, microdeletions in the AZF region of the Y chromosome have been detected in men with azoospermia or severe oligozoospermia. In this study we investigated the prevalence of microdeletions in the AZF region of the Y chromosome in a population of men undergoing ICSI, and looked for clinical characteristics of men with and without this deletion. Blood was drawn from 164 men, who were on the waiting list for ICSI treatment: 19 were azoospermic, 111 oligozoospermic and 34 normozoospermic (after previous total fertilization failure). A total of 100 men with proven fertility served as a control. Microdeletions in the AZFc region were present in seven of the 111 oligozoospermic men (6.3%). Compared with oligozoospermic men without microdeletions, men with microdeletions had a lower concentration of follicle stimulating hormone (FSH), a lower number of motile spermatozoa and a lower frequency of abnormal findings at andrological history or examination. No microdeletions were found in the azoospermic, normozoospermic and control groups. In conclusion, microdeletions in the AZFc region are relatively frequently found in men with severe unexplained oligozoospermia. In the ICSI era this finding has an important impact because this form of male infertility is now potentially hereditary. Therefore we recommend DNA screening (and genetic counselling) before ICSI, especially in men with normal FSH, severe oligozoospermia and no abnormal clinical andrological findings.
منابع مشابه
Partial and complete microdeletions of Y chromosome in infertile males from South of Iran
Y chromosome microdeletions are the second genetic cause of male infertility. The incidence of Y chromosome microdeletions can vary considerably depending on several factors, including patient selection criteria, population composition, and diagnostic protocols. They are associated with spermatogenic failure and lead to azoospermia or oligozoospermia. The advance in assisted reproductive techno...
متن کاملFrequency of Y Chromosome Microdeletions in Azoospermic and Oligospermic Iranian Infertile Men
Background and Aims: Azoospermia factor (AZF) region of the Y-chromosome has several genes which are responsible for normal spermatogenesis. Microdeletions of these genes are associated with azoospermia and oligospermia. These microdeletions are too small to be detected by karyotyping. They can be easily identified using polymerase chain reaction. The aim of this study is to determine the frequ...
متن کاملY Choromosomal Microdeletion Screening in The Workup of Male Infertility and Its Current Status in India
متن کامل
بررسی حذف های کوچک کروموزوم Y در مردان نابارور مراجعه کننده به بیمارستان فاطمیه همدان با روش Multiplex PCR
Introduction & Objective: Male factor is the major cause of infertility in 20% of cases (WHO). There are known etiologies for 70% of cases .However, 30% of infertility cases are of idiopathic origin. The Y chromosome and micro deletion of the long arm of the Y chromosome (Yq) in three regions (AZFa, AZFb ,AZFc ) are associated with spermatogenic failure and is a major etiology for oligo and a...
متن کاملY chromosome microdeletions in idiopathic infertile men from West Azarbaijan.
INTRODUCTION Although assisted reproduction techniques are used extensively in Iran, screening for Y chromosome microdeletions before intracytoplasmic sperm injection is often undervalued. Our aim was to investigate Y chromosome microdeletions in men with idiopathic azoospermia or severe oligospermia. MATERIALS AND METHODS In 99 selected patients with azoospermia or severe oligospermia and el...
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ورودعنوان ژورنال:
- Human reproduction
دوره 12 4 شماره
صفحات -
تاریخ انتشار 1997