Effect of vitamin B12-deficiency on testicular tissue in rats fed by pair-feeding

Tetsunori Kawata, Akiko Tamiki, Ayako Tashiro, Kyoko Suga, Sachiko Kamioka, Kazuhiro Yamada, Masahiro Wada, Nobuo Tanaka, Tadahiro Tadokoro, Akio Maekawa

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19 Citations (Scopus)


The effect of vitamin B12 (B12)-deficiency on testicular tissue was investigated through morphological observations of the rats which had been fed on a B12-deficient soybean protein diet by pair-feeding for 100 days. Testicular B12 content was depressed distinctly by the deficiency. Testes weight and their relative weight (weight per 100 g body weight) as well decreased significantly as compared with those of pair-feeding control rats. Although the decrease in the testicular B12 content due to B12-deficiency was compensated by the administration of cyanocobalamin (CN-B12), alleviation of the decrease in testes weight and relative testes weight was not observed under the condition of the short-term CN-B12 administration. Morphological observations of the testicular tissue in B12-deficient rats revealed atrophy of the seminiferous tubules and aplasia of sperms and spermatids, while testicular findings in both ad libitum-feeding control rats and pair-feeding control rats were normal. There was a tendency for the decrease in seminiferous tubules showing spermatogenesis to be alleviated by administration of CN-B12. The above results indicate that the morphological changes in the testicular tissue are ascribable to B12-deficiency.

Original languageEnglish
Pages (from-to)17-21
Number of pages5
JournalInternational Journal for Vitamin and Nutrition Research
Issue number1
Publication statusPublished - 1997


  • Pair-feeding
  • Testicular morphology
  • Vitamin B-deficiency

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics


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