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Chen B, Yuan C, Guo T, Liu J, Lu Z. METTL3 and FTO Regulate Heat Stress Response in Hu Sheep Through Lipid Metabolism via m6A Modification. Animals (Basel) 2025; 15:193. [PMID: 39858193 PMCID: PMC11758659 DOI: 10.3390/ani15020193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2024] [Revised: 12/23/2024] [Accepted: 01/08/2025] [Indexed: 01/27/2025] Open
Abstract
In an established hepatocyte lipid deposition heat stress model, the expression levels of METTL3 and FTO were significantly upregulated (p < 0.05), indicating that METTL3 and FTO play important roles in the process of lipid deposition heat stress in hepatocytes. Transcriptome and metabolome analyses showed that lipid deposition heat stress had significant effects on the linoleic acid, linolenic acid, glycerophospholipid, and arachidonic acid metabolic pathways in hepatocytes. After METTL3 knockdown, the m6A methylation level decreased, but the difference was not significant (p > 0.05), the FABP4 and Accα expression levels increased, and the HSP60, HSP70, and HSP110 expression levels decreased significantly. After METTL3 overexpression, the m6A methylation level increased significantly and the expression levels of FABP4, ATGL, Accα, HSP60, HSP70, HSP90, and HSP110 decreased significantly, indicating that the overexpression of METTL3 reduced the expression of heat shock genes by inhibiting the lipid-deposition-related gene expression in an m6A-dependent manner. The m6A methylation level increased significantly after FTO knockdown, while HSP60, HSP110, FABP4, ATGL, and Accα expression levels were significantly reduced. Following FTO overexpression, the m6A methylation level and HSP60, HSP90, and HSP110 expression levels significantly decreased, while the ATGL and Accα expression levels significantly increased. This indicates that the overexpression of FTO promoted the expression of lipid-deposition-related genes in an m6A-dependent manner to reduce the expression of heat shock genes. Transcriptome and metabolome sequencing screened a large number of differential genes and metabolites, and a KEGG enrichment analysis showed that m6A methylation mainly regulated heat stress by affecting the TNF, cAMP, MAPK, lipolysis, and synthesis pathways in hepatocytes. In the lipid deposition heat stress model of preadipocytes, the regulation of gene expression was similar to that in hepatocytes.
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Affiliation(s)
- Bowen Chen
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (B.C.); (C.Y.); (T.G.)
- Sheep Breeding Engineering Technology Research Center of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
| | - Chao Yuan
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (B.C.); (C.Y.); (T.G.)
- Sheep Breeding Engineering Technology Research Center of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
| | - Tingting Guo
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (B.C.); (C.Y.); (T.G.)
- Sheep Breeding Engineering Technology Research Center of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
| | - Jianbin Liu
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (B.C.); (C.Y.); (T.G.)
- Sheep Breeding Engineering Technology Research Center of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
| | - Zengkui Lu
- Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China; (B.C.); (C.Y.); (T.G.)
- Sheep Breeding Engineering Technology Research Center of Chinese Academy of Agricultural Sciences, Lanzhou 730050, China
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Yuan JD, Wang LW, Fu SY, E RGLT, Ren XQ, Sun H, Liu F, Wang B, An JH, Zhao MR, He JF, He XL. Heat Tolerance Differences Between Hu Sheep and Hu Crossbred Sheep in Microbial Community Structure and Metabolism. Metabolites 2025; 15:40. [PMID: 39852383 PMCID: PMC11768064 DOI: 10.3390/metabo15010040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2024] [Revised: 12/28/2024] [Accepted: 01/07/2025] [Indexed: 01/26/2025] Open
Abstract
BACKGROUND The frequent occurrence of extreme temperature events causes significant economic losses to the livestock industry. Therefore, delving into the differences in the physiological and molecular mechanisms of heat stress across different sheep breeds is crucial for developing effective management and breeding strategies. METHODS This study explores the differences in heat tolerance mechanisms between Hu sheep and Xinggao sheep by comparing their growth performance under normal and heat stress conditions, as well as examining the differences in physiological, biochemical, and antioxidant indicators related to heat tolerance, serum metabolomics, and gut microbiomics in a heat stress environment. RESULTS The results indicate that with changes in the temperature-humidity index (THI), Hu sheep exhibit superior stability in respiratory rate (RR) and rectal temperature (RT) fluctuations compared to Xinggao sheep. In terms of biochemical indicators and antioxidant capacity, the levels of creatinine (Cr) and superoxide dismutase (SOD) in Hu sheep serum are significantly higher than those in Xinggao sheep. In comparison, alkaline phosphatase (ALP) and malondialdehyde (MDA) levels are significantly lower. Metabolomic results showed that, compared to Hu sheep, Xinggao sheep exhibited higher cortisol (COR) and dopamine (DA) levels under heat stress conditions, a stronger lipid mobilization capacity, and elevated levels of tricarboxylic acid (TCA) cycle-related metabolites. Furthermore, gut microbiome analysis results indicate that Hu sheep demonstrate stronger cellulose degradation capabilities, as evidenced by significantly higher abundances of microorganisms such as Ruminococcus, Fibrobacter, and Bacteroidales_RF16_group, compared to Xinggao sheep. CONCLUSIONS In summary, Hu sheep exhibit stronger heat tolerance compared to Xinggao sheep. These findings provide an important theoretical basis for the breeding and selection of heat-tolerant meat sheep varieties and offer strong support for the region's livestock industry in addressing the challenges posed by global warming.
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Affiliation(s)
- Jing-Da Yuan
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Li-Wei Wang
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Shao-Yin Fu
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Ri-Ge-Li-Tu E
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Xiao-Qi Ren
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Hua Sun
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Fang Liu
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Biao Wang
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Jiang-Hong An
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Meng-Ran Zhao
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
| | - Jiang-Feng He
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Xiao-Long He
- Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; (J.-D.Y.); (L.-W.W.); (S.-Y.F.); (R.-G.-L.-T.E.); (X.-Q.R.); (H.S.); (F.L.); (B.W.); (J.-H.A.); (M.-R.Z.)
- College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China
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Garza-Brenner E, Sánchez-Dávila F, Mauleón-Tolentino K, Zapata-Campos CC, Luna-Palomera C, Hernandez-Melendez J, Gonzalez-Delgado M, Vázquez-Armijo JF. Systematic review of hormonal strategies to improve fertility in rams. Anim Reprod 2024; 21:e20240007. [PMID: 38903866 PMCID: PMC11189135 DOI: 10.1590/1984-3143-ar2024-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/16/2024] [Indexed: 06/22/2024] Open
Abstract
Reviewing the current state of knowledge on reproductive performance and productive traits in rams has many advantages. First, the compilation of this information will serve as a literature resource for scientists conducting research around the world and will contribute to the understanding of the data collected and interpreted by researchers on the different hormonal strategies used to improve reproductive performance in rams. Second, it will allow scientists to identify current knowledge gaps and set future research priorities in ram reproduction. Rams play an important role in the global flock economy, but their reproductive analysis has been limited in the use of hormonal technologies to increase the productivity of sheep flocks. In this review, we cite the most important works on six hormones that, in one way or another, modify the hypothalamus-pituitary-gonadal axis, at different doses, in and out of the reproductive season, breeds, application methods, among other factors. The overall aim is to increase the reproductive efficiency of rams in different scenarios and, in some cases, of other species due to the lack of limited information on rams.
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Affiliation(s)
- Estela Garza-Brenner
- Facultad de Agronomía, Posgrado Conjunto, Universidad Autónoma de Nuevo León, General Escobedo, N.L México
| | - Fernando Sánchez-Dávila
- Facultad de Agronomía, Posgrado Conjunto, Universidad Autónoma de Nuevo León, General Escobedo, N.L México
| | - Keyla Mauleón-Tolentino
- Facultad de Agronomía, Posgrado Conjunto, Universidad Autónoma de Nuevo León, General Escobedo, N.L México
| | - Cecilia Carmela Zapata-Campos
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Tamaulipas, Ciudad Victoria, Tamaulipas, México
| | - Carlos Luna-Palomera
- División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México
| | | | - Marisol Gonzalez-Delgado
- Centro de Investigación en Producción Agropecuaria, Universidad Autónoma de Nuevo León, Linares, Nuevo León, México
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Čukić A, Rakonjac S, Djoković R, Cincović M, Bogosavljević-Bošković S, Petrović M, Savić Ž, Andjušić L, Andjelić B. Influence of Heat Stress on Body Temperatures Measured by Infrared Thermography, Blood Metabolic Parameters and Its Correlation in Sheep. Metabolites 2023; 13:957. [PMID: 37623900 PMCID: PMC10456689 DOI: 10.3390/metabo13080957] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/08/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
The aim of this research is to examine the influence of heat stress (HS) on body temperature (BT) measured rectally (RT) or by infrared thermography (IRT) of the nose (NT), eye (ET), leg (LT) and abdominal (AT) regions in intensively and extensively breed sheep and to detect a correlation between body temperature and metabolic response in sheep. A total of 33 Wurttemberg × Sjenica Pramenka sheep breeds were examined, 17 ewes were from outdoors and 16 were from indoor housing systems during three experimental periods (thermoneutral period, severe HS and moderate HS). Sheep under HS have a higher BT, and the magnitude of BT measured by infrared thermography (IRT) was higher than RT. LT and AT showed positive linear correlations with the temperature-humidity index (THI), while other ways of measuring BT did not give statistically significant correlations. Sheep under HS showed higher cortisol, insulin, total protein, albumin, urea, creatinine, bilirubin, aspartate aminotransferase, alanine aminotransferase, gamma-glutamyl transferase, alkaline phosphatase, lactate dehydrogenase, creatine kinase and index of insulin resistance, with lower values of triiodothyronine (T3), thyroxine (T4), non-esterified fatty acids, beta-hydroxybutyrate (BHB), glucose, calcium, inorganic phosphates, magnesium and cholesterol. BT and metabolic response were different in the function of the housing method of sheep. LT and AT showed a significant correlation with almost all blood parameters, and the strongest connections were made with T3, T4, BHB and the revised quantitative insulin sensitivity check index of insulin resistance. The abdomen and legs are good thermal windows because LT and AT are good summative responses to external ambient THI and internal metabolic changes in sheep under heat stress.
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Affiliation(s)
- Aleksandar Čukić
- Faculty of Agriculture, University of Priština in Kosovska Mitrovica, Kopaonička bb, 38219 Lešak, Serbia; (A.Č.); (Ž.S.); (L.A.)
| | - Simeon Rakonjac
- Faculty of Agronomy, University of Kragujevac, Cara Dušana 34, 32000 Čačak, Serbia; (S.R.); (S.B.-B.); (M.P.)
| | - Radojica Djoković
- Faculty of Agronomy, University of Kragujevac, Cara Dušana 34, 32000 Čačak, Serbia; (S.R.); (S.B.-B.); (M.P.)
| | - Marko Cincović
- Faculty of Agriculture, University of Novi Sad, Novi Sad, Square Dositeja Obradovića 8, 21000 Novi Sad, Serbia;
| | | | - Milun Petrović
- Faculty of Agronomy, University of Kragujevac, Cara Dušana 34, 32000 Čačak, Serbia; (S.R.); (S.B.-B.); (M.P.)
| | - Željko Savić
- Faculty of Agriculture, University of Priština in Kosovska Mitrovica, Kopaonička bb, 38219 Lešak, Serbia; (A.Č.); (Ž.S.); (L.A.)
| | - Ljiljana Andjušić
- Faculty of Agriculture, University of Priština in Kosovska Mitrovica, Kopaonička bb, 38219 Lešak, Serbia; (A.Č.); (Ž.S.); (L.A.)
| | - Biljana Andjelić
- Faculty of Agriculture-Kruševac, University of Niš, Kosančićeva 7, 37000 Kruševac, Serbia;
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Pantoja MHDA, Campos JCD, Almeida DHSD, Negrão JA, Mourão GB, Pereira AMF, Titto CG. Influence of successive heat waves on the thermoregulatory responses of pregnant and non-pregnant ewes. J Therm Biol 2023; 111:103420. [PMID: 36585085 DOI: 10.1016/j.jtherbio.2022.103420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 07/22/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
The frequency of heat waves has increased over the last years, with an impact on animal production and health, including the death of animals. Therefore, the aim of this study was to evaluate the dynamics of thermoregulation and hormonal responses in non-pregnant and pregnant ewes exposed to successive heat waves. Twenty-four non-pregnant and 18 pregnant Santa Ines ewes with black coat color (live weight: 55 ± 9.03 kg; age: 60 months) were used. Weather variables such air temperature, relative humidity, and solar radiation were continuously recorded. The rectal and tympanic temperatures and respiratory rate were measured daily. Serum triiodothyronine (T3) and prolactin were evaluated during the heat wave and thermoneutral periods. The physiological variables were higher under the heat wave conditions and were related to the activation of the thermoregulatory system for maintaining homeothermy (P < 0.05). The core body temperature was higher during successive heat waves (P < 0.05), as was the tympanic temperature, which are both affected by changes in air temperature (P < 0.05). T3 and prolactin levels were not influenced by successive heat waves (P < 0.05) and rectal temperature and respiratory rate were highest in non-pregnant ewes (P < 0.05). Prolactin was not affected by temperature. The results indicate that the Santa Ines breed overcomes the thermal challenge during a heat wave without showing severe signs of thermal stress regardless of being pregnant or not.
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Affiliation(s)
- Messy Hannear de Andrade Pantoja
- Faculdade de Zootecnia e Engenharia de Alimentos/ Universidade de São Paulo, Av. Duque de Caxias Norte, 225, Campus Fernando Costa, Pirassununga, SP, 13635-900, Brazil.
| | - Jessica Caetano Dias Campos
- Faculdade de Zootecnia e Engenharia de Alimentos/ Universidade de São Paulo, Av. Duque de Caxias Norte, 225, Campus Fernando Costa, Pirassununga, SP, 13635-900, Brazil.
| | - Douglas Henrique Silva de Almeida
- Faculdade de Zootecnia e Engenharia de Alimentos/ Universidade de São Paulo, Av. Duque de Caxias Norte, 225, Campus Fernando Costa, Pirassununga, SP, 13635-900, Brazil.
| | - João Alberto Negrão
- Faculdade de Zootecnia e Engenharia de Alimentos/ Universidade de São Paulo, Av. Duque de Caxias Norte, 225, Campus Fernando Costa, Pirassununga, SP, 13635-900, Brazil.
| | - Gerson Barreto Mourão
- Escola Superior de Agricultura Luiz de Queiroz/ Universidade de São Paulo, Av. Pádua Dias, 11, Piracicaba, SP, 13418900, Brazil.
| | | | - Cristiane Gonçalves Titto
- Faculdade de Zootecnia e Engenharia de Alimentos/ Universidade de São Paulo, Av. Duque de Caxias Norte, 225, Campus Fernando Costa, Pirassununga, SP, 13635-900, Brazil.
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Habibu B, Emmanuel M, Yahaya A, Baba A, Yaqub L, Buhari H, Dzenda T, Kawu M. Adaptive performance of hairy thin-tailed (Yankasa) and wooly fat-tailed (Ossimi) sheep in tropical hot-dry season. Small Rumin Res 2021. [DOI: 10.1016/j.smallrumres.2021.106541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nicolás-López P, Macías-Cruz U, Mellado M, Correa-Calderón A, Meza-Herrera CA, Avendaño-Reyes L. Growth performance and changes in physiological, metabolic and hematological parameters due to outdoor heat stress in hair breed male lambs finished in feedlot. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2021; 65:1451-1459. [PMID: 33742264 DOI: 10.1007/s00484-021-02116-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 12/07/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
The aim of this study was to evaluate the effect of seasonal heat stress (HS) on productive performance, physiological responses, metabolism, and hematological profile of hair breed male lambs finished in feedlot. Twenty Dorper × Katahdin male lambs (body weight = 34.6 ± 1.4 kg and age = 4.5 months) were housed in individual pens and exposed to environmental conditions of summer HS (n = 10, temperature = 28.3 ± 4.0 °C and THI = 77.2 ± 5.4 units) or winter thermoneutrality (n = 10, temperature = 19.2 ± 2.6 °C and THI = 64.0 ± 3.0 units). Each season, a 30-day feeding test was conducted to measure study variables. Compared to thermoneutral lambs, heat-stressed lambs had lower (P < 0.01) growth rate and feed efficiency without changing dry matter intake. Heat-stressed lambs presented higher (P < 0.01) rectal temperature and respiratory rate through the daytime than termoneutral lambs. On most sampling days, summer HS caused lower (P < 0.01) serum concentrations of glucose, cholesterol, total protein, urea, potassium, and thyroid hormones, but higher (P < 0.01) serum triglyceride and chlorine values. Overall serum concentrations of cortisol and insulin were unaffected by summer HS. The blood of heat-stressed lambs showed lower (P ≤ 0.03) erythrocyte and platelet counts, hemoglobin, and hematocrit, but higher (P ≤ 0.03) erythrocyte size and leucocyte count than the blood of thermoneutral lambs. In conclusion, hair breed male lambs in response to chronic conditions of summer HS had slow growth but avoided hyperthermia due to the activation of physiological, metabolic and endocrine adjustments.
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Affiliation(s)
- Porfirio Nicolás-López
- Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, 21705, Valle de Mexicali, B.C., México
| | - Ulises Macías-Cruz
- Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, 21705, Valle de Mexicali, B.C., México
| | - Miguel Mellado
- Departamento de Nutrición Animal, Universidad Autónoma Agraria Antonio Narro, 25315, Saltillo, Coahuila, México
| | - Abelardo Correa-Calderón
- Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, 21705, Valle de Mexicali, B.C., México
| | - Cesar A Meza-Herrera
- Universidad Autónoma Chapingo, Unidad Regional Universitaria de Zonas Áridas, 35230, Bermejillo, Durango, México
| | - L Avendaño-Reyes
- Universidad Autónoma de Baja California, Instituto de Ciencias Agrícolas, 21705, Valle de Mexicali, B.C., México.
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Shade or unshaded effects on body composition of growing Afshari lambs during summer. Small Rumin Res 2020. [DOI: 10.1016/j.smallrumres.2020.106254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Avendaño-Reyes L, Macías-Cruz U, Correa-Calderón A, Mellado M, Corrales JL, Corrales G, Ramirez-Bribiesca E, Guerra-Liera JE. Biological responses of hair sheep to a permanent shade during a short heat stress exposure in an arid region. Small Rumin Res 2020. [DOI: 10.1016/j.smallrumres.2020.106146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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De Vasconcelos AM, Osterno JJ, Rogério MCP, Façanha DAE, Landim AV, Pinheiro AA, Silveira RMF, Ferreira JB. Adaptive profile of Saanen goats in tropical conditions. BIOL RHYTHM RES 2019. [DOI: 10.1080/09291016.2019.1603691] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | | | | | | | - Aline Vieira Landim
- Department of Animal Science, State University of Valley Acaraú (UVA), Sobral, CE, Brazil
| | | | | | - Josiel Borges Ferreira
- Department of Animal Science, Federal University of the Semi-arid (UFERSA), Mossoró, RN, Brazil
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Sensitivity, Impact and Consequences of Changes in Respiratory Rate During Thermoregulation in Livestock – A Review. ANNALS OF ANIMAL SCIENCE 2019. [DOI: 10.2478/aoas-2019-0002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Abstract
This review discusses the thermal conservative and heat dissipating roles of one of the most sensitive thermoregulatory variables (respiratory rate) with the aim of enhancing its application in evaluating both cold and heat adaptation. During cold exposure, livestock enhance the economy of body heat through reduction in respiratory rate with the extent of reduction being greater and commencing at relatively higher ambient temperature in poorly adapted phenotypes. This is accompanied by an increase in tidal volume and alveolar oxygen uptake, but a decrease in partial pressure of oxygen. On the other hand, heat stress induces increase in respiratory rate to enhance evaporative heat loss with the magnitude of such increase being greater and commencing at relatively lower ambient temperature in phenotypes that are poorly-adapted to heat. This is accompanied by a decrease in tidal volume and the development of hypocapnia. The increase in respiratory rate is observed to be greater, moderate and lesser in livestock that are mainly (pigs, rabbits and poultry), moderately (sheep, goats and Bos taurus) and less (Zebu cattle) dependent on respiratory evaporative heat loss, respectively. The changes during chronic heat stress may cause acid-base crisis in all livestock, in addition to reduction in eggshell quality in birds; due to marked decrease in partial pressure of carbon dioxide and a compensatory increase in elimination of bicarbonate. Within and between breed variations in sensitivity of respiratory rhythm to both cold and heat stress has shown high applicability in identifying phenotypes that are more susceptible to thermal stress; with some cellular and metabolic changes occurring to protect the animal from the consequences of hypo- or hyper-thermia. The information in this review may provide basis for identification of genes that support or suppress thermoregulation and may also be of great use in animal breeding, genomics and selective thermal stress mitigation to provide maximum protection and comfort to poorly-adapted phenotypes.
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