Assessment of seminal plasma laminin in fertile and infertile men.
OBJECTIVE
To assess laminin levels in the seminal plasma of infertile and fertile men, and to analyze the correlation of laminin levels with sperm count, age, sperm motility and semen volume.


METHODS
One hundred and twenty-five recruited men were equally divided into five groups according to their sperm concentration and clinical examination: fertile normozoospermia, oligoasthenozoospermia, non-obstructive azoospermia (NOA), obstructive azoospermia (OA) and congenital bilateral absent vas deferens (CBAVD). The patients' medical history was investigated and patients underwent clinical examination, conventional semen analysis and estimation of seminal plasma laminin by radioimmunoassay.


RESULTS
Seminal plasma laminin levels of successive groups were: 2.82 +/- 0.62, 2.49 +/- 0.44, 1.77 +/- 0.56, 1.72 +/- 0.76, 1.35 +/- 0.63 U/mL, respectively. The fertile normozoospermic group showed the highest concentration compared to all infertile groups with significant differences compared to azoospermic groups (P<0.05). Testicular contribution was estimated to be approximately one-third of the seminal laminin. Seminal plasma laminin demonstrated significant correlation with sperm concentration (r = 0.460, P < 0.001) and nonsignificant correlation with age (r = 0.021, P = 0.940), sperm motility percentage (r = 0.142, P = 0.615) and semen volume (r = 0.035, P = 0.087).


CONCLUSIONS
Seminal plasma laminin is derived mostly from prostatic and testicular portions and minimally from the seminal vesicle and vas deferens. Estimating seminal laminin alone is not conclusive in diagnosing different cases of male infertility.
El-Dakhly
Mohamed R
MR
Andrology Department, Faculty of Medicine, Cairo University, Cairo 12311, Egypt.
Tawadrous
Gamil A
GA
Mostafa
Taymour
T
Roaia
Mohamed M F
MM
El-Nashar
Abdel R M
AR
Shedeed
Shedeed A
SA
Kamel
Ihab I
II
Aziz
Amal A
AA
El-Mohtaseb
Yasser
Y
D000328:Adult; D053713:Azoospermia / Q000503:physiopathology; D005298:Fertility / Q000502:physiology*; D006801:Humans; D007248:Infertility, Male / Q000503:physiopathology*; D007797:Laminin / Q000378:metabolism*; D008297:Male; D009845:Oligospermia / Q000503:physiopathology; D012661:Semen / Q000502:physiology*; D013076:Sperm Count; D013081:Sperm Motility
D007797:Laminin