TY - JOUR
T1 - Short communication
T2 - Gut microbial colonization of the mouse colon using faecal transfer was equally effective when comparing rectal inoculation and oral inoculation based on 16S rRNA sequencing
AU - Lützhøft, Ditte Olsen
AU - Sánchez-Alcoholado, Lidia
AU - Tougaard, Peter
AU - Junker Mentzel, Caroline M.
AU - Kot, Witold
AU - Nielsen, Dennis S.
AU - Hansen, Axel Kornerup
PY - 2019
Y1 - 2019
N2 - In the present study we hypothesized that a higher degree of gut microbiota (GM) transfer and colonization could be reached by rectal inoculation compared to oral inoculation, which is commonly used in mouse studies for GM transfer. We treated C57BL/6NTac Specific Pathogen Free (SPF) mice with antibiotics and subsequently we inoculated these with GM from donor mice of the same strain by either the oral or the rectal inoculation method. 16S rRNA gene sequencing of the colon microbiota showed no difference in microbial community on account of inoculation method as determined by unweighted UniFrac distance metrics in C57BL/6NTac SPF mice. In addition, qPCR analysis on colon tissue revealed no difference in mRNA expression between the inoculation methods. Next, the SPF mice were compared to germ-free (GF)-mice to identify differences in inoculation efficacy. Whether the mice were antibiotic treated SPF or GF clearly influenced GM determined by 16S rRNA gene sequencing where the SPF mice experienced up-regulation of S24–7 (p = .0001) and a decrease in Rikenellaceae (p = .016) compared to GF mice. qPCR analysis on colon tissue revealed up-regulation in mRNA gene expression of Il6, Il10, Reg3g and transcription factor RORγt (Rorc) in GF mice compared to SPF mice on a significant level (p < .05). This gene expression profile is consistent with post colonization development of the intestinal barrier in GF mice.
AB - In the present study we hypothesized that a higher degree of gut microbiota (GM) transfer and colonization could be reached by rectal inoculation compared to oral inoculation, which is commonly used in mouse studies for GM transfer. We treated C57BL/6NTac Specific Pathogen Free (SPF) mice with antibiotics and subsequently we inoculated these with GM from donor mice of the same strain by either the oral or the rectal inoculation method. 16S rRNA gene sequencing of the colon microbiota showed no difference in microbial community on account of inoculation method as determined by unweighted UniFrac distance metrics in C57BL/6NTac SPF mice. In addition, qPCR analysis on colon tissue revealed no difference in mRNA expression between the inoculation methods. Next, the SPF mice were compared to germ-free (GF)-mice to identify differences in inoculation efficacy. Whether the mice were antibiotic treated SPF or GF clearly influenced GM determined by 16S rRNA gene sequencing where the SPF mice experienced up-regulation of S24–7 (p = .0001) and a decrease in Rikenellaceae (p = .016) compared to GF mice. qPCR analysis on colon tissue revealed up-regulation in mRNA gene expression of Il6, Il10, Reg3g and transcription factor RORγt (Rorc) in GF mice compared to SPF mice on a significant level (p < .05). This gene expression profile is consistent with post colonization development of the intestinal barrier in GF mice.
KW - 16S rRNA sequencing
KW - Conventional mice
KW - Faecal transplantation
KW - Germ-free mice
KW - Oral inoculation
KW - Rectal inoculation
U2 - 10.1016/j.rvsc.2019.09.009
DO - 10.1016/j.rvsc.2019.09.009
M3 - Journal article
C2 - 31627163
AN - SCOPUS:85073098152
VL - 126
SP - 227
EP - 232
JO - Research in Veterinary Science
JF - Research in Veterinary Science
SN - 0034-5288
ER -