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雏鸭胸腺生长指标的动态观测及组织学观察
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方静，崔恒敏，彭西，何敏
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(四川农业大学 动物科学技术学院，四川 雅安625000)
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摘要：
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通过对1～49日龄雏鸭胸腺发育的组织学观察及胸腺重量、胸腺指数和外周血T淋巴细胞α-醋酸萘酯酶阳性率（ANAE＋)的测定，研究了雏鸭胸腺的生长及组织发育规律。结果显示，胸腺重量随日龄增长逐渐增加；胸腺指数在28日龄时达最高；1～28日龄时外周血T淋巴细胞ANAE＋上升幅度较大；21～28日龄时胸腺小叶数量增多，并显著增大；28日龄时皮质部主要为小淋巴细胞；胸腺小体有3种形态。表明，雏鸭在1～14日龄时胸腺生长较缓慢，21～28日龄时生长十分迅速，28日龄时胸腺中大部分T淋巴细胞已发育成熟，35～49日龄时胸腺发育已趋于稳定；胸腺小体是具有高度活性的结构，与清除退变上皮有关。 |
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关键词：
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雏鸭；胸腺发育；T淋巴细胞；胸腺小体 |
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中图分类号：S 852.1 文献标识码：
A 文章编号：1673-4696(2006)05-0401-05 |
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Dynamic measurement of growth indexes and histological
observation of thymus of ducklings |
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FANG Jing，CUI Heng-min，PENG Xi，HE Min |
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(College of Animal Science and Technology, Sichuan Agricultural University,Ya’an 625000,China) |
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Abstract: By using HE method and measuring weight and growth index of thymus and rate of ANAE＋T lymphocytes in peripheral blood, the growth and histological development of thymus of ducklings were studied from 1 to 49 days-old. The weight of thymus increased as the ducklings grew. The highest growth index of thymus was obtained for ducklings of 28 days-old. The rate of ANAE＋T lymphocytes in peripheral blood increased obviously from 1 to 28 days-old. The numbers of thymic lobules with small-sized lymphocytes predominantly in the cortex on 28 days-old increased obviously. There were three types of thymic corpuscles. Results showed that the duckling thymus developed slowly from 1 to 14 days-old, quickly from 21 to 28 days-old and steadily from 35 to 49 days-old. On 28 days-old, most T-lymphocytes reached their maturation. The thymic corpuscles might be the sign of activation and is related with elimination of the degenerating cells. |
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Key words: duckling; development of thymus; T-lymphocyte; thymic corpuscle |
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