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

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Relative mRNA level of immune factors expressed by milk cells compared to β-actin expression

Positive group Negative group
interleukin-6 before 11.80 ± 1.17a 16.33 ± 0.68a *
after 7.97 ± 1.12b 11.98 ± 0.71b *
lysozyme before 5.27 ± 0.34 5.39 ± 0.18
after 5.13 ± 0.25 5.31 ± 0.25
lactotransferrin before 9.28 ± 1.74a 11.32 ± 0.75a
after 7.60 ± 0.97b 8.42 ± 0.61b
defensin-β3 before 3.86 ± 0.27 2.99 ± 0.21
after 3.60 ± 0.37 3.78 ± 0.18
cathelicidin before 6.27 ± 0.56a 8.24 ± 0.42a *
after 4.61 ± 0.74b 5.86 ± 0.39b
pentraxin-3 before 4.31 ± 0.24 4.97 ± 0.22
after 3.84 ± 0.35 4.20 ± 0.20
caspase-3 before 13.84 ± 1.23 15.22 ± 0.30a
after 12.86 ± 0.92 13.49 ± 0.66b
elastase before 10.07 ± 0.96 11.19 ± 0.33
after 10.043 ± 0.45 10.71 ± 0.25

Primers used for real-time PCR

Gene Accession number Product length Primer designation Sequence (5'-3')
β-actin NM_173979.3 76 Forward CCCAGATCATGTTCGAGACC
Reverse GAGGCATACAGGGACAGCAC
interleukin-6 NM_173923.2 102 Forward AGATCCTGAAGCAAAAGATCGC
Reverse TTGCGTTCTTTACCCACTCGT
lysozyme NM_001078159.1 104 Forward TTCGGTCGCTGTCCAAGGCAAGGT
Reverse TCCAGTTTGCCAGGCTGATTCCCC
Forward CACCGAGCACTGGATAAAGGG
lactotransferrin NM_180998.2 136 Reverse AGCCAGACACAGTCCAAGGG
Forward GCATACAAGTGACTGCCCCTG
defensin-β3 NM_001282581.1 70 Reverse ACTGAACCTCTTCCCTGTGTG
cathelicidin Y09472.1 70 Forward GAAAGACTCTCCTACCCTGCCC
Reverse CTCTAAGGGACACACAGCCAGG
pentraxin-3 NM_001076259.2 80 Forward GCAGAGTCCTGTCACATCCG
Reverse ACATACTGTGCTCCTCCGTG
caspase-3 NM_001077840.1 148 Forward CAGGAGTGGAGTCCAGCAGA
Reverse TCCAGAGTCCATTGATTTGCTTC
elastase NM_001105653.1 119 Forward TTGCCTCTGTCGCCAAGTTT
Reverse ACAGCCTTTCTAGTGGGTCC

Major bacteria detected before and after milking in the positive group (n = 12)

aerobic culture anaerobic culture
before after before after
Aerococcus viridans 3 1 2 1
Staphylococcus chromogenes 1 1 1 1
Staphylococcus haemolyticus 3 2 2 1
Staphylococcus xylosus 3 3 4 4
Streptococcus dysgalactiae 0 1 1 1
eISSN:
2450-8608
Langue:
Anglais
Périodicité:
4 fois par an
Sujets de la revue:
Life Sciences, Molecular Biology, Microbiology and Virology, other, Medicine, Veterinary Medicine