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Enzyme histochemical studies on the pathological changes in human Sertoli cells
Summary
Enzyme histochemistry identified two human Sertoli cell disorders in infertile men: asthenia, marked by decreased thiamine pyrophosphatase (TPPase) and lactate dehydrogenase (LDH), and insufficiency, with altered TPPase, absent LDH, and changed phosphatase activities.
Area of Science:
- Reproductive biology
- Histochemistry
- Andrology
Background:
- Sertoli cells are crucial for spermatogenesis.
- Disorders of Sertoli cells are linked to male infertility.
- Enzyme histochemistry offers a method to characterize cellular damage.
Purpose of the Study:
- To enzyme histochemically characterize two forms of human Sertoli cell disorders.
- To correlate these disorders with male infertility and subfertility.
- To investigate the enzyme activity patterns in Sertoli-cell-only syndrome.
Main Methods:
- Analysis of testicular biopsy material from infertile and subfertile patients.
- Enzyme histochemical staining for thiamine pyrophosphatase (TPPase), lactate dehydrogenase (LDH), alkaline phosphatase, and acid phosphatase.
- Characterization of Sertoli cell morphology and germ cell exfoliation.
Main Results:
- Sertoli cell asthenia showed decreased TPPase and LDH activity.
- Sertoli cell insufficiency exhibited heterogeneous TPPase, absent LDH, reduced alkaline phosphatase, and increased acid phosphatase.
- Sertoli-cell-only syndrome displayed distinct acid and TPPase activity patterns based on Sertoli cell morphology.
Conclusions:
- Enzyme histochemistry can differentiate between Sertoli cell asthenia and insufficiency.
- Specific enzyme activity profiles are associated with different Sertoli cell pathologies.
- Understanding these enzyme changes aids in diagnosing and correlating Sertoli cell disorders with male infertility.