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Monogenic Forms of Male Infertility

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Genetics of Endocrine Diseases and Syndromes

Part of the book series: Experientia Supplementum ((EXS,volume 111))

Abstract

Male infertility is a multifactorial and heterogeneous pathological condition affecting 7% of the general male population. The genetic landscape of male infertility is highly complex as semen and testis histological phenotypes are extremely heterogeneous, and at least 2000 genes are predicted to be involved in spermatogenesis. Genetic factors have been described in each etiological category of male reproductive impairment: (1) hypothalamic–pituitary axis dysfunction; (2) quantitative and qualitative alterations of spermatogenesis; (3) ductal obstruction/dysfunction. In 25% of azoospermic and in 10% of oligozoospermic men, a genetic anomaly can be diagnosed with the current genetic testing. However, up to now, only a relatively low number of monogenic factors have a clear-cut cause–effect relationship with impaired reproductive function. Thanks to the widespread diffusion of Next-Generation Sequencing, a continuously increasing number of monogenic causes of male infertility are being discovered and their validation is currently ongoing. The identification of genetic factors is of outmost clinical importance since there is a risk of transmission of genetic defects through natural or assisted reproductive techniques. The benefit of the genetic diagnosis of infertility has an obvious clinical significance for the patient itself with implications not only for his reproductive health but in many instances also for his general health.

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Abbreviations

AIS:

Androgen Insensitivity Syndrome

AOA:

Artificial oocyte activation

ART:

Assisted reproductive techniques

AZF:

Azoospermia factor

CAIS:

Complete Androgen Insensitivity

CAVD:

Congentinal Absence of Vas Deferens

CBAVD:

Congentinal Bilateral Absence of Vas Deferens

CFAP:

Cilia and Flagella Associated Protein family

CHARGE:

Coloboma, Heart defects, Atresia of choanae, Retardation of growth and/or development, Genital and/or urinary defects, Ear anomalies or deafness

CHH:

Congenital hypogonadotropic hypogonadism

CPC:

Chromosomal passenger complex

CPHD:

Combined pituitary hormone deficiency

CUAVD:

Congenital unilateral absence of vas deferens

DBD:

DNA-binding domain

DFS:

Dysplasia of fibrous sheath

DNA-DSB:

DNA-Double Strand Breaks

DSD:

Disorders of sexual development

D-WS:

Dandy-Walker syndrome

FA:

Fanconi anemia

FISH:

Fluorescence in situ hybridization

GHS:

Gordon Holmes syndrome

HS:

Hartsfield syndrome

HTCA:

Head-tail coupling apparatus

ICSI:

Intracytoplasmic sperm injection

KS:

Kallmann syndrome

LBD:

Ligand-binding domain

MAIS:

Mild androgen insensitivity

MGS:

Morning glory syndrome

MMAF:

Multiple Morphological Abnormalities of the sperm Flagella

NAHR:

Nonallelic homologous recombination

NGS:

Next-generation sequencing

NOA:

Nonobstructive azoospermia

NTD:

N-terminal domain

OA:

Obstructive azoospermia

PAIS:

Partial androgen insensitivity

PAR:

Pseudoautosomal region

PCD:

Primary ciliary dyskinesia

PCR:

Polymerase chain reaction

PEPNS:

Polyendocrine deficiencies and Polyneuropathies

PGD:

Preimplantation genetic diagnosis

POI:

Premature ovarian insufficiency

SHFM:

Split-hand/foot malformation

SOD:

Septo-optic dysplasia

TEM:

Transmission electron microscopy

TESE:

Testicular sperm extraction

WES:

Whole-exome sequencing

WS:

Waardenburg syndrome

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Correspondence to Csilla Krausz .

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Krausz, C., Riera-Escamilla, A. (2019). Monogenic Forms of Male Infertility. In: Igaz, P., Patócs, A. (eds) Genetics of Endocrine Diseases and Syndromes. Experientia Supplementum, vol 111. Springer, Cham. https://doi.org/10.1007/978-3-030-25905-1_16

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