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Correlation between the sperm motility and the adenylate cyclase activity in infertile men
H Ishikawa1, H Tomomasa, S Yoshii
1Department of Urology, University of Tsukuba, Ibaraki, Japan.
Abstract:
The relationship between the sperm motility and the adenylate cyclase activity in spermatozoa from patients with male infertility was investigated. Cyclic AMP contents were measured from 34 semen specimens and adenylate cyclase activity were assayed from 50 specimens. All semen specimens were collected from infertile men at our clinic by masturbation after 5 days sexual abstinence. Spermatozoa were washed and concentrated according to the method described by Harrison. The cAMP contents and the adenylate cyclase activity of spermatozoa were determined by radioimmunoassay. Positive correlations were found among the cAMP contents, the adenylate cyclase activity in human spermatozoa and the sperm motility. This result suggests that the sperm motility is regulated by the adenylate cyclase activity via cAMP and that poor sperm motility observed in infertile men is partially caused by the impairment of adenylate cyclase system.
Insights
Sperm motility in infertile men is linked to adenylate cyclase activity. Impaired adenylate cyclase system function contributes to poor sperm motility via cyclic AMP regulation.
Area of Science:
- Reproductive biology
- Andrology
- Biochemistry
Background:
- Male infertility affects a significant portion of the population.
- Sperm motility is a critical factor in natural conception.
- The role of intracellular signaling pathways in sperm function requires further elucidation.
Purpose of the Study:
- To investigate the relationship between sperm motility and adenylate cyclase activity in infertile males.
- To explore the involvement of cyclic AMP (cAMP) in regulating sperm motility.
- To identify potential biochemical markers for male infertility.
Main Methods:
- Semen specimens were collected from 34 infertile men.
- Spermatozoa were isolated and prepared using established methods.
- Cyclic AMP (cAMP) levels were quantified using radioimmunoassay.
- Adenylate cyclase activity was assayed in spermatozoa.
- Correlations between cAMP, enzyme activity, and sperm motility were analyzed.
Main Results:
- A positive correlation was observed between cyclic AMP (cAMP) content and sperm motility.
- Adenylate cyclase activity in spermatozoa showed a positive correlation with sperm motility.
- Both cAMP levels and adenylate cyclase activity were positively associated with sperm motility.
Conclusions:
- Sperm motility appears to be regulated by adenylate cyclase activity through the cyclic AMP (cAMP) pathway.
- Impairment of the adenylate cyclase system may be a contributing factor to poor sperm motility in infertile men.
- Targeting the adenylate cyclase system could offer potential therapeutic strategies for male infertility.