Table 1 Percentage of seminiferous tubules at the most advanced differentiation stage of spermatogenesis in D66 and D140 mice exposed to chemotherapy (VCR or CYP) or unexposed (NaCl 0.9%) during the prepubertal period.

From: Paradoxical risk of reduced fertility after exposure of prepubertal mice to vincristine or cyclophosphamide at low gonadotoxic doses in humans

 

% of seminiferous tubules at the most advanced stage

D66

D140

NaCl 0.9%

VCR

CYP

NaCl 0.9%

VCR

CYP

No germ cell (Sertoli cell-only)

0.0

0.3 ± 0.3

0.0

0.0

0.6 ± 0.4

0.0

Spermatogonia

0.0

0.0

0.0

0.0

0.6 ± 0.4

0.0

Leptotene/zygotene spermatocytes

0.0

0.0

0.0

0.0

1.4 ± 0.6*

0.0

Pachytene spermatocytes

0.6 ± 0.4

3.3 ± 1.0*

0.3 ± 0.3

0.3 ± 0.3

2.8 ± 0.7*

0.6 ± 0.4

Round spermatids

3.6 ± 1.0

7.5 ± 2.5

3.9 ± 1.1

3.3 ± 0.8

15.0 ± 2.0*a

4.7 ± 0.8

Elongating spermatids

3.9 ± 1.0

3.6 ± 0.5

4.7 ± 1.2

5.3 ± 0.8

7.5 ± 1.4 a

7.2 ± 1.1

Elongated spermatids

92.2 ± 1.1

85.8 ± 3.1

91.1 ± 1.5

91.1 ± 1.1

72.2 ± 2.1*a

87.8 ± 1.5

  1. Data are presented as mean ± SEM with n = 6 mice for NaCl 0.9%, VCR and CYP groups. *P < 0.05 compared to NaCl 0.9% group at the same age.
  2. aP < 0.05 compared to VCR group at D66.