Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress
The present study was conducted to investigate the effects of tryptophan (Trp) supplementation on rectal temperature, hormone, and cytokine levels in broilers subjected to acute heat stress. A total of 300 18-day-old female Arbor Acres broilers were randomly allocated to five dietary treatment group...
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| Veröffentlicht in: | Tropical animal health and production 2022-06, Vol.54 (3), p.164-164, Article 164 |
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| creator | Li, Qiufen Zhou, Hua Ouyang, Jingxin Guo, Shuaipeng Zheng, Jun Li, Guanhong |
| description | The present study was conducted to investigate the effects of tryptophan (Trp) supplementation on rectal temperature, hormone, and cytokine levels in broilers subjected to acute heat stress. A total of 300 18-day-old female Arbor Acres broilers were randomly allocated to five dietary treatment groups with six replicates per treatment group and ten birds per replicate. Broilers were fed a basal diet and in the thermoneutral conditions (TN, 23 ± 1 °C) was considered as the TN group. Broilers were fed a basal diet and exposed to acute heat stress (HS, 34 ± 1 °C) was regarded as the HS group, and other broilers exposed to acute heat stress (34 ± 1°C) were fed a basal diet supplemented with 0.09%, 0.18%, and 0.27% Trp. Results indicated that acute heat stress increased the rectal temperature (
P
< 0.05), enhanced the concentrations of corticosterone (CORT), dopamine (DA), adrenaline (Adr), adrenocorticotropic hormone (ACTH), and corticotropin-releasing hormone (CRH) in serum (
P
< 0.05), and elevated the levels of serum tryptophan hydroxylase (TPH)1, tryptophan 2, 3-dioxygenase (TDO), indoleamine 2, 3-dioxygenase (IDO), and kynurenic acid (
P
< 0.05), compared with the TN group. Meanwhile, acute heat stress increased the levels of serum Trp, hypothalamic Trp, 5-hydroxytryptophan (5-HT), and interleukin-22 (
P
< 0.05) relative to the TN group. However, compared with the heat stress group, Trp supplementation decreased the rectal temperature of heat-stressed broilers and dietary 0.09% Trp supplementation decreased the levels of serum CRH and TDO (
P
< 0.05), increased the levels of serum Trp and IL-22 (
P
< 0.05) in heat-stressed broilers. In addition, dietary supplemented with 0.18% Trp reduced the levels of serum DA, Adr, noradrenaline (NA), CRH, TDO, IDO, kynurenic acid, IL-1β, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), increased the levels of serum Trp, 5-HT, and IL-22, and upregulated the concentrations of hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Moreover, dietary 0.27% Trp supplementation decreased the levels of serum DA, CRH, TDO, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), and upregulated the levels of serum Trp, 5-HT, IL-22, hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Taken together, dietary 0.18% Trp supplementation may be the optimal level for broilers reared under acute heat stress. |
| doi_str_mv | 10.1007/s11250-022-03161-3 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_2652031320</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2652031320</sourcerecordid><originalsourceid>FETCH-LOGICAL-c419t-c91410604c7857e875c71dc36790a479bd6c037fb92c67c938fb0e0ef94acdb53</originalsourceid><addsrcrecordid>eNp9kc1u1TAQhS0EopcLL8ACWWLDooFx7MTxElXlR6rEBtaW40y4KYkdPE7V-wY8Ni63gMQCaWRbmu8cj-Yw9lzAawGg35AQdQMV1HUFUrSikg_YTjRaVlrJ7iHbAShTKa30GXtCdA1QZF37mJ3JRpUyasd-XI4j-kw8jnyYMLt05Dkd1xzXgwuctnWdccGQXZ5i4KX6OBQElxWTy1vCc36IaYmhPFwYuD_m-G0KyGe8wZn4VBQpTjMm4ni7RsKB58id3zLyA7rMKSckesoejW4mfHZ_79mXd5efLz5UV5_ef7x4e1V5JUyuvBFKQAvK667R2OnGazF42WoDTmnTD60Hqcfe1L7V3shu7AEBR6OcH_pG7tmrk--a4vcNKdtlIo_z7ALGjWzdNnXZpizHnr38B72OWwplujtKGNCy04WqT5RPkSjhaNc0LWWPVoC9y8mecrIlJ_srJyuL6MW99dYvOPyR_A6mAPIEUGmFr5j-_v0f25-5HZ-5</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2651907387</pqid></control><display><type>article</type><title>Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress</title><source>MEDLINE</source><source>SpringerLink Journals</source><creator>Li, Qiufen ; Zhou, Hua ; Ouyang, Jingxin ; Guo, Shuaipeng ; Zheng, Jun ; Li, Guanhong</creator><creatorcontrib>Li, Qiufen ; Zhou, Hua ; Ouyang, Jingxin ; Guo, Shuaipeng ; Zheng, Jun ; Li, Guanhong</creatorcontrib><description><![CDATA[The present study was conducted to investigate the effects of tryptophan (Trp) supplementation on rectal temperature, hormone, and cytokine levels in broilers subjected to acute heat stress. A total of 300 18-day-old female Arbor Acres broilers were randomly allocated to five dietary treatment groups with six replicates per treatment group and ten birds per replicate. Broilers were fed a basal diet and in the thermoneutral conditions (TN, 23 ± 1 °C) was considered as the TN group. Broilers were fed a basal diet and exposed to acute heat stress (HS, 34 ± 1 °C) was regarded as the HS group, and other broilers exposed to acute heat stress (34 ± 1°C) were fed a basal diet supplemented with 0.09%, 0.18%, and 0.27% Trp. Results indicated that acute heat stress increased the rectal temperature (
P
< 0.05), enhanced the concentrations of corticosterone (CORT), dopamine (DA), adrenaline (Adr), adrenocorticotropic hormone (ACTH), and corticotropin-releasing hormone (CRH) in serum (
P
< 0.05), and elevated the levels of serum tryptophan hydroxylase (TPH)1, tryptophan 2, 3-dioxygenase (TDO), indoleamine 2, 3-dioxygenase (IDO), and kynurenic acid (
P
< 0.05), compared with the TN group. Meanwhile, acute heat stress increased the levels of serum Trp, hypothalamic Trp, 5-hydroxytryptophan (5-HT), and interleukin-22 (
P
< 0.05) relative to the TN group. However, compared with the heat stress group, Trp supplementation decreased the rectal temperature of heat-stressed broilers and dietary 0.09% Trp supplementation decreased the levels of serum CRH and TDO (
P
< 0.05), increased the levels of serum Trp and IL-22 (
P
< 0.05) in heat-stressed broilers. In addition, dietary supplemented with 0.18% Trp reduced the levels of serum DA, Adr, noradrenaline (NA), CRH, TDO, IDO, kynurenic acid, IL-1β, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), increased the levels of serum Trp, 5-HT, and IL-22, and upregulated the concentrations of hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Moreover, dietary 0.27% Trp supplementation decreased the levels of serum DA, CRH, TDO, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), and upregulated the levels of serum Trp, 5-HT, IL-22, hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Taken together, dietary 0.18% Trp supplementation may be the optimal level for broilers reared under acute heat stress.]]></description><identifier>ISSN: 0049-4747</identifier><identifier>EISSN: 1573-7438</identifier><identifier>DOI: 10.1007/s11250-022-03161-3</identifier><identifier>PMID: 35435494</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Adrenocorticotropic hormone ; Animal Feed - analysis ; Animals ; Biomedical and Life Sciences ; Body Temperature ; Chickens ; Corticosterone ; Corticotropin-releasing hormone ; Cytokines ; Diet ; Diet - veterinary ; Dietary Supplements ; Dioxygenase ; Dioxygenases ; Dopamine ; Epinephrine ; Exposure ; Female ; Heat ; Heat stress ; Heat Stress Disorders - veterinary ; Heat tolerance ; Heat-Shock Response ; Hormones ; Hot Temperature ; Hydroxyindoleacetic Acid ; Hypothalamus ; IL-1β ; Interleukin 22 ; Interleukins ; Kynurenic Acid ; Life Sciences ; Noradrenaline ; Norepinephrine ; Rectum ; Regular Articles ; Serotonin ; Tryptophan ; Tryptophan hydroxylase ; Veterinary Medicine/Veterinary Science ; Zoology</subject><ispartof>Tropical animal health and production, 2022-06, Vol.54 (3), p.164-164, Article 164</ispartof><rights>The Author(s), under exclusive licence to Springer Nature B.V. 2022</rights><rights>2022. The Author(s), under exclusive licence to Springer Nature B.V.</rights><rights>The Author(s), under exclusive licence to Springer Nature B.V. 2022.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c419t-c91410604c7857e875c71dc36790a479bd6c037fb92c67c938fb0e0ef94acdb53</citedby><cites>FETCH-LOGICAL-c419t-c91410604c7857e875c71dc36790a479bd6c037fb92c67c938fb0e0ef94acdb53</cites><orcidid>0000-0002-3589-9023</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11250-022-03161-3$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11250-022-03161-3$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35435494$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Li, Qiufen</creatorcontrib><creatorcontrib>Zhou, Hua</creatorcontrib><creatorcontrib>Ouyang, Jingxin</creatorcontrib><creatorcontrib>Guo, Shuaipeng</creatorcontrib><creatorcontrib>Zheng, Jun</creatorcontrib><creatorcontrib>Li, Guanhong</creatorcontrib><title>Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress</title><title>Tropical animal health and production</title><addtitle>Trop Anim Health Prod</addtitle><addtitle>Trop Anim Health Prod</addtitle><description><![CDATA[The present study was conducted to investigate the effects of tryptophan (Trp) supplementation on rectal temperature, hormone, and cytokine levels in broilers subjected to acute heat stress. A total of 300 18-day-old female Arbor Acres broilers were randomly allocated to five dietary treatment groups with six replicates per treatment group and ten birds per replicate. Broilers were fed a basal diet and in the thermoneutral conditions (TN, 23 ± 1 °C) was considered as the TN group. Broilers were fed a basal diet and exposed to acute heat stress (HS, 34 ± 1 °C) was regarded as the HS group, and other broilers exposed to acute heat stress (34 ± 1°C) were fed a basal diet supplemented with 0.09%, 0.18%, and 0.27% Trp. Results indicated that acute heat stress increased the rectal temperature (
P
< 0.05), enhanced the concentrations of corticosterone (CORT), dopamine (DA), adrenaline (Adr), adrenocorticotropic hormone (ACTH), and corticotropin-releasing hormone (CRH) in serum (
P
< 0.05), and elevated the levels of serum tryptophan hydroxylase (TPH)1, tryptophan 2, 3-dioxygenase (TDO), indoleamine 2, 3-dioxygenase (IDO), and kynurenic acid (
P
< 0.05), compared with the TN group. Meanwhile, acute heat stress increased the levels of serum Trp, hypothalamic Trp, 5-hydroxytryptophan (5-HT), and interleukin-22 (
P
< 0.05) relative to the TN group. However, compared with the heat stress group, Trp supplementation decreased the rectal temperature of heat-stressed broilers and dietary 0.09% Trp supplementation decreased the levels of serum CRH and TDO (
P
< 0.05), increased the levels of serum Trp and IL-22 (
P
< 0.05) in heat-stressed broilers. In addition, dietary supplemented with 0.18% Trp reduced the levels of serum DA, Adr, noradrenaline (NA), CRH, TDO, IDO, kynurenic acid, IL-1β, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), increased the levels of serum Trp, 5-HT, and IL-22, and upregulated the concentrations of hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Moreover, dietary 0.27% Trp supplementation decreased the levels of serum DA, CRH, TDO, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), and upregulated the levels of serum Trp, 5-HT, IL-22, hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Taken together, dietary 0.18% Trp supplementation may be the optimal level for broilers reared under acute heat stress.]]></description><subject>Adrenocorticotropic hormone</subject><subject>Animal Feed - analysis</subject><subject>Animals</subject><subject>Biomedical and Life Sciences</subject><subject>Body Temperature</subject><subject>Chickens</subject><subject>Corticosterone</subject><subject>Corticotropin-releasing hormone</subject><subject>Cytokines</subject><subject>Diet</subject><subject>Diet - veterinary</subject><subject>Dietary Supplements</subject><subject>Dioxygenase</subject><subject>Dioxygenases</subject><subject>Dopamine</subject><subject>Epinephrine</subject><subject>Exposure</subject><subject>Female</subject><subject>Heat</subject><subject>Heat stress</subject><subject>Heat Stress Disorders - veterinary</subject><subject>Heat tolerance</subject><subject>Heat-Shock Response</subject><subject>Hormones</subject><subject>Hot Temperature</subject><subject>Hydroxyindoleacetic Acid</subject><subject>Hypothalamus</subject><subject>IL-1β</subject><subject>Interleukin 22</subject><subject>Interleukins</subject><subject>Kynurenic Acid</subject><subject>Life Sciences</subject><subject>Noradrenaline</subject><subject>Norepinephrine</subject><subject>Rectum</subject><subject>Regular Articles</subject><subject>Serotonin</subject><subject>Tryptophan</subject><subject>Tryptophan hydroxylase</subject><subject>Veterinary Medicine/Veterinary Science</subject><subject>Zoology</subject><issn>0049-4747</issn><issn>1573-7438</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNp9kc1u1TAQhS0EopcLL8ACWWLDooFx7MTxElXlR6rEBtaW40y4KYkdPE7V-wY8Ni63gMQCaWRbmu8cj-Yw9lzAawGg35AQdQMV1HUFUrSikg_YTjRaVlrJ7iHbAShTKa30GXtCdA1QZF37mJ3JRpUyasd-XI4j-kw8jnyYMLt05Dkd1xzXgwuctnWdccGQXZ5i4KX6OBQElxWTy1vCc36IaYmhPFwYuD_m-G0KyGe8wZn4VBQpTjMm4ni7RsKB58id3zLyA7rMKSckesoejW4mfHZ_79mXd5efLz5UV5_ef7x4e1V5JUyuvBFKQAvK667R2OnGazF42WoDTmnTD60Hqcfe1L7V3shu7AEBR6OcH_pG7tmrk--a4vcNKdtlIo_z7ALGjWzdNnXZpizHnr38B72OWwplujtKGNCy04WqT5RPkSjhaNc0LWWPVoC9y8mecrIlJ_srJyuL6MW99dYvOPyR_A6mAPIEUGmFr5j-_v0f25-5HZ-5</recordid><startdate>20220601</startdate><enddate>20220601</enddate><creator>Li, Qiufen</creator><creator>Zhou, Hua</creator><creator>Ouyang, Jingxin</creator><creator>Guo, Shuaipeng</creator><creator>Zheng, Jun</creator><creator>Li, Guanhong</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QL</scope><scope>7T7</scope><scope>7U7</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>P64</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-3589-9023</orcidid></search><sort><creationdate>20220601</creationdate><title>Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress</title><author>Li, Qiufen ; Zhou, Hua ; Ouyang, Jingxin ; Guo, Shuaipeng ; Zheng, Jun ; Li, Guanhong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-c91410604c7857e875c71dc36790a479bd6c037fb92c67c938fb0e0ef94acdb53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Adrenocorticotropic hormone</topic><topic>Animal Feed - analysis</topic><topic>Animals</topic><topic>Biomedical and Life Sciences</topic><topic>Body Temperature</topic><topic>Chickens</topic><topic>Corticosterone</topic><topic>Corticotropin-releasing hormone</topic><topic>Cytokines</topic><topic>Diet</topic><topic>Diet - veterinary</topic><topic>Dietary Supplements</topic><topic>Dioxygenase</topic><topic>Dioxygenases</topic><topic>Dopamine</topic><topic>Epinephrine</topic><topic>Exposure</topic><topic>Female</topic><topic>Heat</topic><topic>Heat stress</topic><topic>Heat Stress Disorders - veterinary</topic><topic>Heat tolerance</topic><topic>Heat-Shock Response</topic><topic>Hormones</topic><topic>Hot Temperature</topic><topic>Hydroxyindoleacetic Acid</topic><topic>Hypothalamus</topic><topic>IL-1β</topic><topic>Interleukin 22</topic><topic>Interleukins</topic><topic>Kynurenic Acid</topic><topic>Life Sciences</topic><topic>Noradrenaline</topic><topic>Norepinephrine</topic><topic>Rectum</topic><topic>Regular Articles</topic><topic>Serotonin</topic><topic>Tryptophan</topic><topic>Tryptophan hydroxylase</topic><topic>Veterinary Medicine/Veterinary Science</topic><topic>Zoology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Qiufen</creatorcontrib><creatorcontrib>Zhou, Hua</creatorcontrib><creatorcontrib>Ouyang, Jingxin</creatorcontrib><creatorcontrib>Guo, Shuaipeng</creatorcontrib><creatorcontrib>Zheng, Jun</creatorcontrib><creatorcontrib>Li, Guanhong</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Agricultural Science Collection</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Public Health Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>ProQuest Biological Science Collection</collection><collection>Agricultural Science Database</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biological Science Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>MEDLINE - Academic</collection><jtitle>Tropical animal health and production</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Qiufen</au><au>Zhou, Hua</au><au>Ouyang, Jingxin</au><au>Guo, Shuaipeng</au><au>Zheng, Jun</au><au>Li, Guanhong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress</atitle><jtitle>Tropical animal health and production</jtitle><stitle>Trop Anim Health Prod</stitle><addtitle>Trop Anim Health Prod</addtitle><date>2022-06-01</date><risdate>2022</risdate><volume>54</volume><issue>3</issue><spage>164</spage><epage>164</epage><pages>164-164</pages><artnum>164</artnum><issn>0049-4747</issn><eissn>1573-7438</eissn><abstract><![CDATA[The present study was conducted to investigate the effects of tryptophan (Trp) supplementation on rectal temperature, hormone, and cytokine levels in broilers subjected to acute heat stress. A total of 300 18-day-old female Arbor Acres broilers were randomly allocated to five dietary treatment groups with six replicates per treatment group and ten birds per replicate. Broilers were fed a basal diet and in the thermoneutral conditions (TN, 23 ± 1 °C) was considered as the TN group. Broilers were fed a basal diet and exposed to acute heat stress (HS, 34 ± 1 °C) was regarded as the HS group, and other broilers exposed to acute heat stress (34 ± 1°C) were fed a basal diet supplemented with 0.09%, 0.18%, and 0.27% Trp. Results indicated that acute heat stress increased the rectal temperature (
P
< 0.05), enhanced the concentrations of corticosterone (CORT), dopamine (DA), adrenaline (Adr), adrenocorticotropic hormone (ACTH), and corticotropin-releasing hormone (CRH) in serum (
P
< 0.05), and elevated the levels of serum tryptophan hydroxylase (TPH)1, tryptophan 2, 3-dioxygenase (TDO), indoleamine 2, 3-dioxygenase (IDO), and kynurenic acid (
P
< 0.05), compared with the TN group. Meanwhile, acute heat stress increased the levels of serum Trp, hypothalamic Trp, 5-hydroxytryptophan (5-HT), and interleukin-22 (
P
< 0.05) relative to the TN group. However, compared with the heat stress group, Trp supplementation decreased the rectal temperature of heat-stressed broilers and dietary 0.09% Trp supplementation decreased the levels of serum CRH and TDO (
P
< 0.05), increased the levels of serum Trp and IL-22 (
P
< 0.05) in heat-stressed broilers. In addition, dietary supplemented with 0.18% Trp reduced the levels of serum DA, Adr, noradrenaline (NA), CRH, TDO, IDO, kynurenic acid, IL-1β, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), increased the levels of serum Trp, 5-HT, and IL-22, and upregulated the concentrations of hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Moreover, dietary 0.27% Trp supplementation decreased the levels of serum DA, CRH, TDO, and hypothalamic 5-HIAA/5-HT (
P
< 0.05), and upregulated the levels of serum Trp, 5-HT, IL-22, hypothalamic Trp and 5-HT in heat-stressed broilers (
P
< 0.05). Taken together, dietary 0.18% Trp supplementation may be the optimal level for broilers reared under acute heat stress.]]></abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><pmid>35435494</pmid><doi>10.1007/s11250-022-03161-3</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0002-3589-9023</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0049-4747 |
| ispartof | Tropical animal health and production, 2022-06, Vol.54 (3), p.164-164, Article 164 |
| issn | 0049-4747 1573-7438 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2652031320 |
| source | MEDLINE; SpringerLink Journals |
| subjects | Adrenocorticotropic hormone Animal Feed - analysis Animals Biomedical and Life Sciences Body Temperature Chickens Corticosterone Corticotropin-releasing hormone Cytokines Diet Diet - veterinary Dietary Supplements Dioxygenase Dioxygenases Dopamine Epinephrine Exposure Female Heat Heat stress Heat Stress Disorders - veterinary Heat tolerance Heat-Shock Response Hormones Hot Temperature Hydroxyindoleacetic Acid Hypothalamus IL-1β Interleukin 22 Interleukins Kynurenic Acid Life Sciences Noradrenaline Norepinephrine Rectum Regular Articles Serotonin Tryptophan Tryptophan hydroxylase Veterinary Medicine/Veterinary Science Zoology |
| title | Effects of dietary tryptophan supplementation on body temperature, hormone, and cytokine levels in broilers exposed to acute heat stress |
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