Study on the structure and the development of the canalicular system of the mammary gland during lactation in Manchega and Lacaune dairy sheep

A. Carretero; J. Ruberte; G. Caja; F.J. Pèrez-Aparicio; X. Such; S. Peris; M. Manesse; M. Navarro

Study on the structure and the development of the canalicular system of the mammary gland during lactation in Manchega and Lacaune dairy sheep

In: Milking and milk production of dairy sheep and goats

Authors:

A. Carretero

A. Carretero Anatomia i Embriologia, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by A. Carretero in
Current site
Google Scholar
PubMed

J. Ruberte

J. Ruberte Anatomia i Embriologia, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by J. Ruberte in
Current site
Google Scholar
PubMed

G. Caja

G. Caja Produccio Animal, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by G. Caja in
Current site
Google Scholar
PubMed

F.J. Pèrez-Aparicio

F.J. Pèrez-Aparicio Anatomia i Embriologia, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by F.J. Pèrez-Aparicio in
Current site
Google Scholar
PubMed

X. Such

X. Such Produccio Animal, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by X. Such in
Current site
Google Scholar
PubMed

S. Peris

S. Peris Produccio Animal, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by S. Peris in
Current site
Google Scholar
PubMed

M. Manesse

M. Manesse Laboratoire d’Anatomie, Ecole Nationale Vétérinaire de Toulouse, 31076 Toulouse, France

Search for other papers by M. Manesse in
Current site
Google Scholar
PubMed

, and

M. Navarro

M. Navarro Anatomia i Embriologia, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain

Search for other papers by M. Navarro in
Current site
Google Scholar
PubMed

Type:: Chapter

Pages:: 35–40

DOI:: https://doi.org/10.1163/9789004683877_004

Purchase instant access (PDF download and unlimited online access):

€42.00€35.00 excl. VAT

Add to Cart

Redeem Access Token

Summary

In order to observe the changes in the glandular system of the udder during lactation, a total of 18 ewes of Manchega (n=9) and Lacaune (n=9) dairy breeds in the 3rd lactation were used. The study was conducted at three stages of lactation: weeks 1 (n=6), 5 (n=4) and 13 (n=8). After an injection of 5IU of oxytocin and drainage of the total milk in the udder, ewes were euthanised and immediately injected with a colored epoxy resin in the right mammary gland through the papillary opening. Repletion of the canalicular system (alveoli, ducts and sinus) was obtained using a syringe pump. Udders were removed after hardening of the epoxy during 48h under refrigeration and the surrounding organic tissue was corroded using a 20% OHK solution. The resulting casts were washed, dried and processed for scanning electron microscopy. Different stages of development of the canalicular system, and frequency and types of tubulogenic structures were identified in the electron microscopy images according to stage of lactation.

At week 1, an intussusceptive growth from preexisting tubules was found, showing an increase in the number of tubules after parturition. A further development occurred at the alveoli level in the 5th lactation week. At this time, structures like angiogenic buds were frequently identified at the end of the tubules. These buds appeared as semispherical enlargements that grow from the ducts and become almost spherical by the narrowing of their connection with the duct. The bud surface then loses its smoothness and develops small sockets with a golf ball-like image identified as alveoli. At week 15, segmentation of the alveoli was the main development observed. Both dairy breeds followed the same pattern in development during lactation despite their differences in milk yield.

In conclusion, the mammary gland of dairy sheep showed a relevant development of the canalicular system and proliferation of alveoli during lactation. A parallel was found between the development of the canalicular and vascular systems. Key words: udder, lactation, alveoli cast, scanning electron microscopy, dairy sheep, ewe

Citation Info

Save
Cite
Email this content

Share link with colleague or librarian

You can email a link to this page to a colleague or librarian:
Email this content
or copy the link directly:

https://brill.edhh.ma/abstract/book/9789004683877/B9789004683877_s004.xml
The link was not copied. Your current browser may not support copying via this button.

Link copied successfully

Collapse
Expand

Milking and milk production of dairy sheep and goats

E-Book ISBN:: 9789004683877

Publisher:: Wageningen Academic

Print Publication Date:: 01 Jan 1999

Subjects
- Life Sciences
  - General
  - Animal & Veterinary

Front Matter

Show Items

Back Matter

Show Items

Metrics

	All Time	Past 365 days
Abstract Views	23	10
Full Text Views	0	0
PDF Views & Downloads	0	0

African Studies	Education	Media Studies
American Studies	History	Middle East and Islamic Studies
Ancient Near East and Egypt	Human Rights and Humanitarian Law	Musicology
Art History	International Law	Philosophy
Asian Studies	International Relations	Religious Studies
Biblical Studies	Jewish Studies	Slavic and Eurasian Studies
Biology	Languages and Linguistics	Social Sciences
Book History and Cartography	Life Sciences	Theology and World Christianity
Classical Studies	Literature and Cultural Studies

Subjects

Authors

Open Access

Product Information

Company

Contact

Study on the structure and the development of the canalicular system of the mammary gland during lactation in Manchega and Lacaune dairy sheep

Summary

Citation Info

Share link with colleague or librarian

Milking and milk production of dairy sheep and goats

Table of Contents

Metrics

Metrics