| Titles |
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English :
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Characteristics of cellular junctions in mammary alveoli in Egyptian buffaloes
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Arabic :
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خواص الاتصال بين الخلايا في حويصلات الغدة اللبنية للجاموس المصرى
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| Abstract |
This experimentation was carried out on five Egyptian buffaloes, to study the changes in the alveolar mary cells junctions throughout the lactation season. The work was executed to study the relation between the changes in the cellular junctions and milk major cations (Ca++, Na+ & K+) throughout the lactational season. Biopsies of mammary parenchyma were taken at two stages, at early lactation and near to the end of lactation (early involution) . At early stage of lactation the tight junction was 19.78 ±0.99 nm in width and 174.16±22.36nm in length. At the involution stage the junctions were, in general, abolished and substituted by wide intercellular spaces ( 1349.12±51.31nm), the number of ridges a long 5 micron of junction at the early stage of lactation was 6.15±0.11. The gap between external and internal nuclear membranes was 36.39± 1.75nm in fully lactating cells and 127.27±6.27nm in involuting cells. The concentrations of Ca++ were 12.86±0.60 and 11.12±0.57mg/dl. in blood plasma and 135.87±3.50 and 121.56±401 mg/dl.in milk at lactation and illvolution stages, respectively. Thc Na+ concentration in milk was increased significantly with advancement of lactation (89.11±3.91 and 120.76±5.18mg/dl.), while the concentration in blood plasma was constant (448.08±23.81 and 449.18±22.15 mg/dl.) at early lactation and involution stages, respectively. Thc K+ concentration increased with advancement of lactation; by 20% in hlood plasma and 10 % in milk (32.93±2.01 and 39.77±2.81mg/dl. plasma and 148.00±4.89 and 163.17±16.38 mg/dl. milk, at early and late stages, respectively).
Key words: Buffaloes, mammary gland, cellular junctions.
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| Publication year |
2005
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| Pages |
57-65
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Journal of Buffalo Science and Technique Bubolus bubalis
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| ISSN |
1594-7718
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| Author(s) from ARC |
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Lactation.
Mammary glands.
Water buffaloes.
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| Proposed Agrovoc |
cellular junctions;
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| Publication Type |
Journal
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