<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec id="j_jvetres-2019-0042_s_005">
<h3>Introduction</h3>
<p>The characteristics of immune factors in somatic cells from lactating dairy cows and their association with commensal bacteria in normal milk have not been clarified. This study investigated the relationship between the pathogenic bacteria in milk and somatic cell immune factors in healthy lactating cows.</p></sec>
<sec id="j_jvetres-2019-0042_s_006">
<h3>Material and Methods</h3>
<p>In total 44 healthy Holstein cows were studied on one farm. Milk samples were collected aseptically using a cannula and these samples were cultured for detection of bacteria and analysis of mRNA of immune factors expressed by somatic cells. Cows were divided into two groups based on the microbial status of their milk samples: 12 cows showed bacteria in cultures (positive group), and the other 32 cows did not (negative group).</p></sec>
<sec id="j_jvetres-2019-0042_s_007">
<h3>Results</h3>
<p>The mRNA levels of IL-6, lactotransferrin, and cathelicidin expressed by somatic cells after milking decreased significantly compared to those before milking in both groups (P &lt; 0.05). There were significantly lower mRNA levels of IL-6 and cathelicidin in the positive group compared to those in the negative group before milking.</p></sec>
<sec id="j_jvetres-2019-0042_s_008">
<h3>Conclusion</h3>
<p>These results suggest that mRNA levels of IL-6 and cathelicidin expressed by the somatic cells may be affected by the presence of bacteria in healthy lactating dairy cows.</p></sec>
</abstract>

Introduction
The characteristics of immune factors in somatic cells from lactating dairy cows and their association with commensal bacteria in normal milk have not been clarified. This study investigated the relationship between the pathogenic bacteria in milk and somatic cell immune factors in healthy lactating cows.

Material and Methods
In total 44 healthy Holstein cows were studied on one farm. Milk samples were collected aseptically using a cannula and these samples were cultured for detection of bacteria and analysis of mRNA of immune factors expressed by somatic cells. Cows were divided into two groups based on the microbial status of their milk samples: 12 cows showed bacteria in cultures (positive group), and the other 32 cows did not (negative group).

Results
The mRNA levels of IL-6, lactotransferrin, and cathelicidin expressed by somatic cells after milking decreased significantly compared to those before milking in both groups (P < 0.05). There were significantly lower mRNA levels of IL-6 and cathelicidin in the positive group compared to those in the negative group before milking.

Conclusion
These results suggest that mRNA levels of IL-6 and cathelicidin expressed by the somatic cells may be affected by the presence of bacteria in healthy lactating dairy cows.

Relationship between mRNA of immune factors expressed by milk somatic cells and bacteria present in healthy lactating Holstein cows

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction
The characteristics of immune factors in somatic cells from lactating dairy cows and their association with commensal bacteria in normal milk have...

Relationship between mRNA of immune factors expressed by milk somatic cells and bacteria present in healthy lactating Holstein cows

Article Category: Short Communication

Publicado en línea: 13 sept 2019

Páginas: 369 - 373

Recibido: 09 ene 2019

Aceptado: 02 jul 2019

DOI: https://doi.org/10.2478/jvetres-2019-0042

Palabras clave
cows, milk, bacteria, immune factor, somatic cells

© 2019 H. Ohtsuka et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Relationship between mRNA of immune factors expressed by milk somatic cells and bacteria present in healthy lactating Holstein cows

Article Category: Short Communication

Publicado en línea: 13 sept 2019

Páginas: 369 - 373

Recibido: 09 ene 2019

Aceptado: 02 jul 2019

DOI: https://doi.org/10.2478/jvetres-2019-0042

Palabras clavecows, milk, bacteria, immune factor, somatic cells

© 2019 H. Ohtsuka et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Palabras clave
cows, milk, bacteria, immune factor, somatic cells