Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta africana)
Adipose tissue (AT) was reported to influence reproductive functions through regulation of the hypothalamus-pituitary-gonadal axis, and infertility in captive African elephants has been correlated to obesity. Next generation sequencing was utilised to generate transcriptomes of peri-renal AT from cu...
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my.umk.eprints.92242022-05-23T11:18:16Z http://discol.umk.edu.my/id/eprint/9224/ Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta africana) Siew Shean Choong Lisa Yon Mongan, Nigel P. Stansfield, Fiona J. Allen, William R. Fuentes-Utrillia, Pablo Emes, Richard D. Adipose tissue (AT) was reported to influence reproductive functions through regulation of the hypothalamus-pituitary-gonadal axis, and infertility in captive African elephants has been correlated to obesity. Next generation sequencing was utilised to generate transcriptomes of peri-renal AT from culled wild adults. RNA was extracted using Qiagen RNeasy Mini Kit, followed by quality evaluation with Agilent 2100 Bioanalyzer. RNA transcription was quantified using RNA-Seq (Illumina HiSeq). A total of 63,041,074 (F1), 83,963,786 (F2), and 56,783,624 (M1) paired reads were obtained. Differential gene expressions (DGE) were analysed using edgeR (www.bioconductor.org/packages/release/bioc/html/edgeR.html). Statistically significant DGE related to adipogenesis, lipogenesis and energy homeostasis were validated using qRT-PCR (ELOVL5, FASN, LEP, NR2F2, PPARγ, RXRα, SCD). DGE were also evaluated between sexes and ages (adult-juveniles) through qRT-PCR. Hierarchical clustering of gene expressions in adults revealed that genes expressed by the non-pregnant female (F2) was closer to those of the young growing bull, compared to the lactating female (F1). Furthermore, pregnant or lactating females showed a higher energy expenditure and lower lipogenesis level compared to young growing males. This may be due to high energy requirement for maintenance of pregnancy and lactation. However, energy homeostasis of the juveniles appeared to be more comparable between sexes, as mRNA expression failed to show a clear pattern of differential expression. This is indicative of similar growth rate in these juveniles. Results from this study provides baseline data on the dynamics of AT in wild African elephants. Ultimately, knowledge generated will be used to improve management and fertility of captive African elephants. 2016 Conference or Workshop Item NonPeerReviewed Siew Shean Choong and Lisa Yon and Mongan, Nigel P. and Stansfield, Fiona J. and Allen, William R. and Fuentes-Utrillia, Pablo and Emes, Richard D. (2016) Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta africana). In: The 9th International Meeting of Asian Society of Conservation Medicine (ASCM) One Health in Asia‐ Pacific, 21‐24 Oct 2016, Taipei Zoo, Taiwan. http://aszwm.org/?page_id=1154&page=4 |
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Adipose tissue (AT) was reported to influence reproductive functions through regulation of the
hypothalamus-pituitary-gonadal axis, and infertility in captive African elephants has been correlated to
obesity. Next generation sequencing was utilised to generate transcriptomes of peri-renal AT from culled
wild adults. RNA was extracted using Qiagen RNeasy Mini Kit, followed by quality evaluation with
Agilent 2100 Bioanalyzer. RNA transcription was quantified using RNA-Seq (Illumina HiSeq). A total of
63,041,074 (F1), 83,963,786 (F2), and 56,783,624 (M1) paired reads were obtained. Differential gene
expressions (DGE) were analysed using edgeR (www.bioconductor.org/packages/release/bioc/html/edgeR.html).
Statistically significant DGE related to adipogenesis, lipogenesis and energy homeostasis were validated
using qRT-PCR (ELOVL5, FASN, LEP, NR2F2, PPARγ, RXRα, SCD). DGE were also evaluated between
sexes and ages (adult-juveniles) through qRT-PCR. Hierarchical clustering of gene expressions in adults
revealed that genes expressed by the non-pregnant female (F2) was closer to those of the young growing
bull, compared to the lactating female (F1). Furthermore, pregnant or lactating females showed a higher
energy expenditure and lower lipogenesis level compared to young growing males. This may be due to
high energy requirement for maintenance of pregnancy and lactation. However, energy homeostasis of the
juveniles appeared to be more comparable between sexes, as mRNA expression failed to show a clear
pattern of differential expression. This is indicative of similar growth rate in these juveniles. Results from
this study provides baseline data on the dynamics of AT in wild African elephants. Ultimately, knowledge
generated will be used to improve management and fertility of captive African elephants. |
format |
Conference or Workshop Item |
author |
Siew Shean Choong Lisa Yon Mongan, Nigel P. Stansfield, Fiona J. Allen, William R. Fuentes-Utrillia, Pablo Emes, Richard D. |
spellingShingle |
Siew Shean Choong Lisa Yon Mongan, Nigel P. Stansfield, Fiona J. Allen, William R. Fuentes-Utrillia, Pablo Emes, Richard D. Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta africana) |
author_facet |
Siew Shean Choong Lisa Yon Mongan, Nigel P. Stansfield, Fiona J. Allen, William R. Fuentes-Utrillia, Pablo Emes, Richard D. |
author_sort |
Siew Shean Choong |
title |
Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta
africana) |
title_short |
Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta
africana) |
title_full |
Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta
africana) |
title_fullStr |
Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta
africana) |
title_full_unstemmed |
Comparative transcriptomics in adipose tissue of wild African elephants (Loxodonta
africana) |
title_sort |
comparative transcriptomics in adipose tissue of wild african elephants (loxodonta
africana) |
publishDate |
2016 |
url |
http://discol.umk.edu.my/id/eprint/9224/ http://aszwm.org/?page_id=1154&page=4 |
_version_ |
1763304077052084224 |
score |
13.160551 |