1
|
Wang L, Valencak TG, Shan T. Fat infiltration in skeletal muscle: Influential triggers and regulatory mechanism. iScience 2024; 27:109221. [PMID: 38433917 PMCID: PMC10907799 DOI: 10.1016/j.isci.2024.109221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024] Open
Abstract
Fat infiltration in skeletal muscle (also known as myosteatosis) is now recognized as a distinct disease from sarcopenia and is directly related to declining muscle capacity. Hence, understanding the origins and regulatory mechanisms of fat infiltration is vital for maintaining skeletal muscle development and improving human health. In this article, we summarized the triggering factors such as aging, metabolic diseases and metabolic syndromes, nonmetabolic diseases, and muscle injury that all induce fat infiltration in skeletal muscle. We discussed recent advances on the cellular origins of fat infiltration and found several cell types including myogenic cells and non-myogenic cells that contribute to myosteatosis. Furthermore, we reviewed the molecular regulatory mechanism, detection methods, and intervention strategies of fat infiltration in skeletal muscle. Based on the current findings, our review will provide new insight into regulating function and lipid metabolism of skeletal muscle and treating muscle-related diseases.
Collapse
Affiliation(s)
- Liyi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | | | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| |
Collapse
|
2
|
Huang Y, Zhu Q, Zhu Y, Valencak TG, Han Y, Ren T, Guo C, Ren D. Rapid UV Photo-Cross-Linking of α-Lactalbumin Hydrogel Biomaterial To Enable Wound Healing. ACS Omega 2024; 9:401-412. [PMID: 38222502 PMCID: PMC10785314 DOI: 10.1021/acsomega.3c05793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 01/16/2024]
Abstract
Although both the function and biocompatibility of protein-based biomaterials are better than those of synthetic materials, their usage as medical material is currently limited by their high costs, low yield, and low batch-to-batch reproducibility. In this article, we show how α-lactalbumin (α-LA), rich in tryptophan, was used to produce a novel type of naturally occurring, protein-based biomaterial suitable for wound dressing. To create a photo-cross-linkable polymer, α-LA was methacrylated at a 100-g batch scale with >95% conversion and 90% yield. α-LAMA was further processed using photo-cross-linking-based advanced processing techniques such as microfluidics and 3D printing to create injectable hydrogels, monodispersed microspheres, and patterned scaffolds. The obtained α-LAMA hydrogels show promising biocompatibility and degradability during in vivo testing. Additionally, the α-LAMA hydrogel can accelerate post-traumatic wound healing and promote new tissue regeneration. In conclusion, cheap and safe α-LAMA-based biomaterials could be produced, and they have a beneficial effect on wound healing. As a result, there may arise a potential partnership between the dairy industry and the development of pharmaceuticals.
Collapse
Affiliation(s)
- Yaqing Huang
- Institute
of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310027, China
| | - Qinchao Zhu
- Institute
of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310027, China
| | - Yang Zhu
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Teresa G. Valencak
- Institute
of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310027, China
| | - Ying Han
- The
State Key Laboratory of Fluid Power and Mechatronic Systems, School
of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Tanchen Ren
- Department
of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province,
Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310027, China
| | - Chengchen Guo
- School
of Engineering, Westlake University, Hangzhou, Zhejiang 310023, China
| | - Daxi Ren
- Institute
of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310027, China
| |
Collapse
|
3
|
Zhu SL, Gu FF, Tang YF, Liu XH, Jia MH, Valencak TG, Liu JX, Sun HZ. Dynamic fecal microenvironment properties enable predictions and understanding of peripartum blood oxidative status and nonesterified fatty acids in dairy cows. J Dairy Sci 2024; 107:573-592. [PMID: 37690725 DOI: 10.3168/jds.2022-23066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 08/02/2023] [Indexed: 09/12/2023]
Abstract
The transition period in dairy cows is a critical stage and peripartum oxidative status, negative energy balance (NEB), and inflammation are highly prevalent. Fecal microbial metabolism is closely associated with blood oxidative status and nonesterified fatty acids (NEFA) levels. Here, we investigated dynamic changes in total oxidative status markers and NEFA in blood, fecal microbiome, and metabolome of 30 dairy cows during transition (-21, -7, +7, +21 d relative to calving). Then the Bayesian network and 9 machine-learning algorithms were applied to dismantle their relationship. Our results show that the oxidative status indicator (OSI) of -21, -7, +7 d was higher than +21 d. The plasma concentration of NEFA peaked on +7 d. For fecal microenvironment, a decline in bacterial α diversity was observed at postpartum and in bacterial interactions at +7 d. Conversely, microbial metabolites involved in carbohydrate, lipid, and energy metabolism increased on +7 d. A correlation analysis revealed that 11 and 10 microbial metabolites contributed to OSI and NEFA variations, respectively (arc strength >0.5). The support vector machine (SVM) radial model showed the highest average predictive accuracy (100% and 88.9% in the test and external data sets) for OSI using 1 metabolite and 3 microbiota. The SVM radial model also showed the highest average diagnostic accuracy (100% and 91% in the test and external data sets) for NEFA with 2 metabolites and 3 microbiota. Our results reveal a relationship between variation in the fecal microenvironment and indicators of oxidative status, NEB, and inflammation, which provide a theoretical basis for the prevention and precise regulation of peripartum oxidative status and NEB.
Collapse
Affiliation(s)
- Sen-Lin Zhu
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Feng-Fei Gu
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Yi-Fan Tang
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Xiao-Han Liu
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Ming-Hui Jia
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Teresa G Valencak
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Jian-Xin Liu
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China; Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China
| | - Hui-Zeng Sun
- Key Laboratory of Dairy Cow Genetic Improvement and Milk Quality Research of Zhejiang Province, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China; Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China; Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
4
|
You W, Xu Z, Chen W, Yang X, Liu S, Wang L, Tu Y, Zhou Y, Valencak TG, Wang Y, Kuang S, Shan T. Cellular and Transcriptional Dynamics during Brown Adipose Tissue Regeneration under Acute Injury. Research (Wash D C) 2023; 6:0268. [PMID: 38434240 PMCID: PMC10907023 DOI: 10.34133/research.0268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 10/18/2023] [Indexed: 03/05/2024]
Abstract
Brown adipose tissue (BAT) is the major site of non-shivering thermogenesis and crucial for systemic metabolism. Under chronic cold exposures and high-fat diet challenges, BAT undergoes robust remodeling to adapt to physiological demands. However, whether and how BAT regenerates after acute injuries are poorly understood. Here, we established a novel BAT injury and regeneration model (BAT-IR) in mice and performed single-cell RNA sequencing (scRNA-seq) and bulk RNA-seq to determine cellular and transcriptomic dynamics during BAT-IR. We further defined distinct fibro-adipogenic and myeloid progenitor populations contributing to BAT regeneration. Cell trajectory and gene expression analyses uncovered the involvement of MAPK, Wnt, and Hedgehog (Hh) signaling pathways in BAT regeneration. We confirmed the role of Hh signaling in BAT development through Myf5Cre-mediated conditional knockout (cKO) of the Sufu gene to activate Hh signaling in BAT and muscle progenitors. Our BAT-IR model therefore provides a paradigm to identify conserved cellular and molecular mechanisms underlying BAT development and remodeling.
Collapse
Affiliation(s)
- Wenjing You
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Ziye Xu
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- Department of Laboratory Medicine, the First Affiliated Hospital, College of Medicine,
Zhejiang University, Hangzhou, China
| | - Wentao Chen
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Xin Yang
- Department of Animal Sciences,
Purdue University, West Lafayette, IN, USA
| | - Shiqi Liu
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Liyi Wang
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Yuang Tu
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Yanbing Zhou
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Shihuan Kuang
- Department of Animal Sciences,
Purdue University, West Lafayette, IN, USA
| | - Tizhong Shan
- College of Animal Sciences,
Zhejiang University, Hangzhou, China
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| |
Collapse
|
5
|
Hoffman JM, Schmitz B, Pfabe JU, Ohrnberger SA, Valencak TG. Lactating SKH-1 furless mice prioritize own comfort over growth of their pups. J Comp Physiol B 2023; 193:453-459. [PMID: 37243858 PMCID: PMC10985496 DOI: 10.1007/s00360-023-01498-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 05/29/2023]
Abstract
Lactation is the most energetically demanding physiological process that occurs in mammalian females, and as a consequence of this energy expenditure, lactating females produce an enormous amount of excess heat. This heat is thought to limit the amount of milk a mother produces, and by improving heat dissipation, females may improve their milk production and offspring quality. Here we used SKH-1 hairless mice as a natural model of improved heat dissipation. Lactating mothers were given access to a secondary cage to rest away from their pups, and this secondary cage was kept either at room temperature (22 °C) in the control rounds or cooled to 8 °C in the experimental groups. We hypothesized that the cold exposure would maximize the heat dissipation potential, leading to increased milk production and healthier pups even in the hairless mouse model. However, we found the opposite, where cold exposure allowed mothers to eat more food, but they produced smaller weight pups at the end of lactation. Our results suggest that mothers prioritize their own fitness, even if it lowers the fitness of their offspring in this particular mouse strain. This maternal-offspring trade-off is interesting and requires future studies to understand the full interaction of maternal effects and offspring fitness in the light of the heat dissipation limitation.
Collapse
Affiliation(s)
- Jessica M Hoffman
- Department of Biological Sciences, Augusta University, 1120 15th Street, Augusta, GA, 30912, USA
| | - Britta Schmitz
- Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Johannes U Pfabe
- Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Sarah A Ohrnberger
- Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Teresa G Valencak
- Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria.
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China.
- Agency for Health and Food Safety, Spargelfeldstrasse 191, 1220, Vienna, Austria.
| |
Collapse
|
6
|
Wu Z, Shi W, Valencak TG, Zhang Y, Liu G, Ren D. Biodegradation of conventional plastics: Candidate organisms and potential mechanisms. Sci Total Environ 2023; 885:163908. [PMID: 37149171 DOI: 10.1016/j.scitotenv.2023.163908] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 05/08/2023]
Abstract
With the benefits of coming at low-cost, being light-weight and having a high formability and durability, conventional plastics are widely used in both industry and daily life. However, because of their durability and extensive half-life with poor degradability and the low recycling rate, large amounts of plastic waste are accumulated in various environments, posing a significant threat to organisms and ecosystems. Compared to conventional physical and chemical degradation, biodegradation of plastic might become a promising and environmentally friendly solution for this problem. One of the aims of this review is to briefly describe the impact of plastics (especially microplastics). To facilitate rapid advancements in the area of plastic biodegradation, this paper provides a comprehensive review of the candidate organisms capable of biodegrading plastics and originating from four categories including natural microorganisms, artificially derived microorganisms, algae and animal organisms. In addition, the potential mechanism during plastic biodegradation and associated driving factors are summarized and discussed. Furthermore, the recent biotechnological progress (e.g. synthetic biology, systems biology, etc.) is highlighted as being key for future research. Finally, innovative research avenues for future studies are proposed. Concluding, our review is addressing the practical application of plastic biodegradation and the plastic pollution, thus necessitating more sustainable developments.
Collapse
Affiliation(s)
- Zeyu Wu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Shi
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Teresa G Valencak
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yanan Zhang
- Key Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, Hangzhou 310058, China
| | - Guangxu Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Daxi Ren
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
7
|
Corlatti L, Palme R, Valencak TG, Gomez KM. Season-dependent impact of forage quality on stress in alpine chamois. Ecol Evol 2023; 13:e10045. [PMID: 37139402 PMCID: PMC10150231 DOI: 10.1002/ece3.10045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 03/27/2023] [Accepted: 04/12/2023] [Indexed: 05/05/2023] Open
Abstract
Chronically heightened stress levels in wildlife species may have detrimental effects on individual life history traits, for example, through the increased likelihood of disease, parasitic infections, and overall reduced fitness. Understanding the drivers of stress may thus have great potential for informing wildlife conservation. Although the role of climate and individual status is well studied in stress ecology, the impact of related stressors such as dietary quality is of increasing interest to wildlife research and conservation. In this study, fecal cortisol metabolites (FCMs) in Alpine chamois Rupicapra r. rupicapra used as bioindicators of stress, and their relationship with forage quality-measured as the percentage of fecal crude protein (CP)-were investigated. Data collection took place in 2011 and 2012 in the Gran Paradiso National Park (Western Italian Alps), on 22 individually marked adult males. The relationship between FCMs and CPs was analyzed through linear models and separated between winter and summer months, accounting for the effect of potentially confounding exogenous and endogenous variables. After AICc-based model selection, we found that forage quality was negatively related to FCM levels in Alpine chamois during the summer months, meaning that higher quality forage was associated with the decreased expression of stress hormones. However, during the winter months, we did not find a significant relationship, potentially as a result of forage quality being ubiquitously poor. Although the mechanisms through which dietary variations impact FCM concentrations in wildlife populations are largely unknown, the occurrence of significant relationships between forage quality and stress levels supports potentially important implications for the long-term effect of climatic changes on the fitness of wildlife populations.
Collapse
Affiliation(s)
- Luca Corlatti
- Chair of Wildlife Ecology and ManagementUniversity of FreiburgFreiburgGermany
- Stelvio National Park – ERSAF LombardiaBormioItaly
| | - Rupert Palme
- Department of Biomedical SciencesUniversity of Veterinary MedicineViennaAustria
| | | | | |
Collapse
|
8
|
Gu F, Zhu S, Tang Y, Liu X, Jia M, Malmuthuge N, Valencak TG, McFadden JW, Liu JX, Sun HZ. Gut microbiome is linked to functions of peripheral immune cells in transition cows during excessive lipolysis. Microbiome 2023; 11:40. [PMID: 36869370 PMCID: PMC9983187 DOI: 10.1186/s40168-023-01492-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 02/07/2023] [Indexed: 05/07/2023]
Abstract
BACKGROUND Postpartum dairy cows experiencing excessive lipolysis are prone to severe immunosuppression. Despite the extensive understanding of the gut microbial regulation of host immunity and metabolism, its role during excessive lipolysis in cows is largely unknown. Herein, we investigated the potential links between the gut microbiome and postpartum immunosuppression in periparturient dairy cows with excessive lipolysis using single immune cell transcriptome, 16S amplicon sequencing, metagenomics, and targeted metabolomics. RESULTS The use of single-cell RNA sequencing identified 26 clusters that were annotated to 10 different immune cell types. Enrichment of functions of these clusters revealed a downregulation of functions in immune cells isolated from a cow with excessive lipolysis compared to a cow with low/normal lipolysis. The results of metagenomic sequencing and targeted metabolome analysis together revealed that secondary bile acid (SBA) biosynthesis was significantly activated in the cows with excessive lipolysis. Moreover, the relative abundance of gut Bacteroides sp. OF04 - 15BH, Paraprevotella clara, Paraprevotella xylaniphila, and Treponema sp. JC4 was mainly associated with SBA synthesis. The use of an integrated analysis showed that the reduction of plasma glycolithocholic acid and taurolithocholic acid could contribute to the immunosuppression of monocytes (CD14+MON) during excessive lipolysis by decreasing the expression of GPBAR1. CONCLUSIONS Our results suggest that alterations in the gut microbiota and their functions related to SBA synthesis suppressed the functions of monocytes during excessive lipolysis in transition dairy cows. Therefore, we concluded that altered microbial SBA synthesis during excessive lipolysis could lead to postpartum immunosuppression in transition cows. Video Abstract.
Collapse
Affiliation(s)
- Fengfei Gu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Senlin Zhu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Yifan Tang
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Xiaohan Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Minghui Jia
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Nilusha Malmuthuge
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1 Ave S, Lethbridge, AB, T1J 4B1, Canada
| | - Teresa G Valencak
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Joseph W McFadden
- Department of Animal Science, Cornell University, 507 Tower Rd, Ithaca, NY, 14850, USA
| | - Jian-Xin Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China
| | - Hui-Zeng Sun
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
9
|
Zhu Q, Zhou X, Zhang Y, Ye D, Yu K, Cao W, Zhang L, Zheng H, Sun Z, Guo C, Hong X, Zhu Y, Zhang Y, Xiao Y, Valencak TG, Ren T, Ren D. White-light crosslinkable milk protein bioadhesive with ultrafast gelation for first-aid wound treatment. Biomater Res 2023; 27:6. [PMID: 36737833 PMCID: PMC9898936 DOI: 10.1186/s40824-023-00346-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Post-traumatic massive hemorrhage demands immediately available first-aid supplies with reduced operation time and good surgical compliance. In-situ crosslinking gels that are flexibly adapting to the wound shape have a promising potential, but it is still hard to achieve fast gelation, on-demand adhesion, and wide feasibility at the same time. METHODS A white-light crosslinkable natural milk-derived casein hydrogel bioadhesive is presented for the first time. Benefiting from abundant tyrosine residues, casein hydrogel bioadhesive was synthesized by forming di-tyrosine bonds under white light with a ruthenium-based catalyst. We firstly optimized the concentration of proteins and initiators to achieve faster gelation and higher mechanical strength. Then, we examined the degradation, cytotoxicity, tissue adhesion, hemostasis, and wound healing ability of the casein hydrogels to study their potential to be used as bioadhesives. RESULT Rapid gelation of casein hydrogel is initiated with an outdoor flashlight, a cellphone flashlight, or an endoscopy lamp, which facilitates its usage during first-aid and minimally invasive operations. The rapid gelation enables 3D printing of the casein hydrogel and excellent hemostasis even during liver hemorrhage due to section injury. The covalent binding between casein and tissue enables robust adhesion which can withstand more than 180 mmHg blood pressure. Moreover, the casein-based hydrogel can facilitate post-traumatic wound healing caused by trauma due to its biocompatibility. CONCLUSION Casein-based bioadhesives developed in this study pave a way for broad and practical application in emergency wound management.
Collapse
Affiliation(s)
- Qinchao Zhu
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Xuhao Zhou
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Yanan Zhang
- grid.13402.340000 0004 1759 700XKey Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Di Ye
- grid.13402.340000 0004 1759 700XDepartment of Veterinary Medicine, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Kang Yu
- grid.13402.340000 0004 1759 700XKey Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Wangbei Cao
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Liwen Zhang
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Houwei Zheng
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Ziyang Sun
- grid.494629.40000 0004 8008 9315School of Engineering, Westlake University, 310023 Hangzhou, Zhejiang China
| | - Chengchen Guo
- grid.494629.40000 0004 8008 9315School of Engineering, Westlake University, 310023 Hangzhou, Zhejiang China
| | - Xiaoqian Hong
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Yang Zhu
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Yajun Zhang
- grid.13402.340000 0004 1759 700XSir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310020 Hangzhou, Zhejiang China
| | - Ying Xiao
- grid.13402.340000 0004 1759 700XSir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310020 Hangzhou, Zhejiang China
| | - Teresa G. Valencak
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Tanchen Ren
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Daxi Ren
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| |
Collapse
|
10
|
You W, Liu S, Ji J, Ling D, Tu Y, Zhou Y, Chen W, Valencak TG, Wang Y, Shan T. Growth arrest and DNA damage-inducible alpha regulates muscle repair and fat infiltration through ATP synthase F1 subunit alpha. J Cachexia Sarcopenia Muscle 2023; 14:326-341. [PMID: 36511343 PMCID: PMC9891974 DOI: 10.1002/jcsm.13134] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 10/06/2022] [Accepted: 11/10/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Skeletal muscle fat infiltration is a common feature during ageing, obesity and several myopathies associated with muscular dysfunction and sarcopenia. However, the regulatory mechanisms of intramuscular adipogenesis and strategies to reduce fat infiltration in muscle remain unclear. Here, we identified the growth arrest and DNA damage-inducible alpha (GADD45A), a stress-inducible histone folding protein, as a critical regulator of intramuscular fat (IMAT) infiltration. METHODS To explore the role of GADD45A on IMAT infiltration and muscle regeneration, the gain or loss function of GADD45A in intramuscular preadipocytes was performed. The adipocyte-specific GADD45A knock-in (KI) mice and high IMAT-infiltrated muscle model by glycerol injection (50 μL of 50% v/v GLY) were generated. RNA-sequencing, histological changes, gene expression, lipid metabolism, mitochondrial function and the effect of dietary factor epigallocatechin-3-gallate (EGCG) treatment (100 mg/kg) on IMAT infiltration were studied. RESULTS The unbiased transcriptomics data analysis indicated that GADD45A expression positively correlates with IMAT infiltration and muscle metabolic disorders in humans (correlation: young vs. aged people, Gadd45a and Cebpa, r2 = 0.20, P < 0.05) and animals (correlation: wild-type [WT] vs. mdx mice, Gadd45a and Cebpa, r2 = 0.38, P < 0.05; NaCl vs. GLY mice, Gadd45a and Adipoq/Fabp4, r2 = 0.80/0.71, both P < 0.0001). In vitro, GADD45A overexpression promotes intramuscular preadipocyte adipogenesis, upregulating the expression of adipogenic genes (Ppara: +47%, Adipoq: +28%, P < 0.001; Cebpa: +135%, Fabp4: +16%, P < 0.01; Pparg: +66%, Leptin: +77%, P < 0.05). GADD45A knockdown robustly decreased lipid accumulation (Pparg: -57%, Adipoq: -35%, P < 0.001; Fabp4: -37%, P < 0.01; Leptin: -28%, P < 0.05). GADD45A KI mice exhibit inhibited skeletal muscle regeneration (myofibres: -40%, P < 0.01) and enhanced IMAT infiltration (adipocytes: +20%, P < 0.05). These KI mice have impaired exercise endurance and mitochondrial function. Mechanistically, GADD45A affects ATP synthase F1 subunit alpha (ATP5A1) ubiquitination degradation (ubiquitinated ATP5A1, P < 0.001) by recruiting the E3 ubiquitin ligase TRIM25, which decreases ATP synthesis (ATP production: -23%, P < 0.01) and inactivates the cAMP/PKA/LKB1 signalling pathway (cAMP: -36%, P < 0.01; decreased phospho-PKA and phospho-LKB1 protein content, P < 0.01). The dietary factor EGCG can protect against muscle fat infiltration (triglyceride: -64%, P < 0.05) via downregulating GADD45A (decreased GADD45A protein content, P < 0.001). CONCLUSIONS Our findings reveal a crucial role of GADD45A in regulating muscle repair and fat infiltration and suggest that inhibition of GADD45A by EGCG might be a potential strategy to combat fat infiltration and its associated muscle dysfunction.
Collapse
Affiliation(s)
- Wenjing You
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Shiqi Liu
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Jianfei Ji
- Key Laboratory for Cell and Gene Engineering of Zhejiang Province, College of Life SciencesZhejiang UniversityHangzhouChina
| | - Defeng Ling
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Yuang Tu
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Yanbing Zhou
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Wentao Chen
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | | | - Yizhen Wang
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| | - Tizhong Shan
- College of Animal SciencesZhejiang UniversityHangzhouZhejiangChina
- The Key Laboratory of Molecular Animal NutritionMinistry of EducationHangzhouChina
- Zhejiang Provincial Laboratory of Feed and Animal NutritionHangzhouChina
| |
Collapse
|
11
|
Wu JJ, Zhu S, Tang YF, Gu F, Valencak TG, Liu JX, Sun HZ. Age- and microbiota-dependent cell stemness plasticity revealed by cattle cell landscape. Research 2023; 6:0025. [PMID: 37040481 PMCID: PMC10076005 DOI: 10.34133/research.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 11/26/2022] [Indexed: 01/12/2023]
Abstract
Newborn ruminants are considered functionally monogastric animals. The poor understanding of cellular differences between newborn and mature ruminants prevents the improvement of health and performance of domestic ruminants. Here, we performed the single-cell RNA sequencing on the rumen, reticulum, omasum, abomasum, duodenum, jejunum, ileum, cecum, colon, rectum, liver, salivary gland, and mammary gland from newborn and adult cattle. A comprehensive single-cell transcriptomic atlas covering 235,941 high-quality single cells and 78 cell types was deciphered. A Cattle Cell Landscape database (http://cattlecelllandscape.zju.edu.cn) was established to elaborately display the data and facilitate effective annotation of cattle cell types and subtypes for the broad research community. By measuring stemness states of epithelial cells in each tissue type, we revealed that the epithelial cells from newborn forestomach (rumen, reticulum, and omasum) were more transcriptionally indistinct and stochastic compared with the adult stage, which was in contrast to those of abomasum and intestinal tissues. The rapid forestomach development during the early life of calves was driven by epithelial progenitor-like cells with high DNA repair activities and methylation. Moreover, in the forestomach tissues of newborn calves, the Megasphaera genus was involved in regulating the transcriptional plasticity of the epithelial progenitor-like cells by DNA methylation regulation. A novel cell type, the STOML3+ cell, was found to be newborn-specific. It apparently plays a crucial role in stemness maintenance of its own and cholangiocytes in the hepatic microenvironment. Our results reveal that the age- and microbiota-dependent cell stemness plasticity drives the postnatal functional maturity of ruminants.
Collapse
Affiliation(s)
- Jia-Jin Wu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Senlin Zhu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Yi-Fan Tang
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Fengfei Gu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Teresa G. Valencak
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Jian-Xin Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China
| | - Hui-Zeng Sun
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
12
|
Cao F, Ding Q, Zhuge H, Lai S, Chang K, Le C, Yang G, Valencak TG, Li S, Ren D. Lactobacillus plantarum ZJUIDS14 alleviates non-alcoholic fatty liver disease in mice in association with modulation in the gut microbiota. Front Nutr 2023; 9:1071284. [PMID: 36698477 PMCID: PMC9868733 DOI: 10.3389/fnut.2022.1071284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 12/23/2022] [Indexed: 01/11/2023] Open
Abstract
This present study was designed to explore the protective role of Lactobacillus plantarum ZJUIDS14 against Non-alcoholic Fatty Liver Disease (NAFLD) in a high-fat-diet (HFD)-induced C57BL/6 mice model. The probiotic (109 CFU/every other day) was administered by oral gavage for 12 weeks. We found that L. plantarum ZJUIDS14 intervention significantly alleviated HFD related hepatic steatosis, liver damage, insulin resistance, and increased hepatic expression of peroxisome proliferator activated receptor α (PPAR-α) while stimulating the activation of AMP-activated protein kinase (AMPK). Furthermore, L. plantarum ZJUIDS14 improved mitochondrial function as reflected by an increase in dynamin related protein 1 (DRP1) and a decrease of proteins associated with oxidative phosphorylation (OXPHOS) after the treatment. Additionally, mice from the L. plantarum ZJUIDS14 group had a restored intestinal flora and homeostasis involving Coprostanoligenes group, Ruminococcaceae UCG-014, Allobaculum, Ruminiclostridium 1, and Roseburia. Meanwhile, these five genera exhibited a significant (negative or positive) association with ileum inflammation mRNA levels and SCFA contents, by Spearman's correlation analysis. In general, our data demonstrated that L. plantarum ZJUIDS14 mitigates hepatic steatosis and liver damage induced by HFD. Specifically, they strengthened the integrity of the intestinal barrier, regulated gut microbiota, and improved mitochondrial function. Our data provide an experimental basis for L. plantarum ZJUIDS14 as a promising candidate to prevent NAFLD.
Collapse
Affiliation(s)
- Feiwei Cao
- College of Animal Sciences, Institute of Dairy Science, Zhejiang University, Hangzhou, China,School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Qinchao Ding
- College of Animal Sciences, Institute of Dairy Science, Zhejiang University, Hangzhou, China,School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hui Zhuge
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shanglei Lai
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Kaixin Chang
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Chunyan Le
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Guorong Yang
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Teresa G. Valencak
- College of Animal Sciences, Institute of Dairy Science, Zhejiang University, Hangzhou, China
| | - Songtao Li
- School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China,*Correspondence: Songtao Li,
| | - Daxi Ren
- College of Animal Sciences, Institute of Dairy Science, Zhejiang University, Hangzhou, China,Daxi Ren,
| |
Collapse
|
13
|
Liu Y, Yang Y, Wu R, Gao CC, Liao X, Han X, Zeng B, Huang C, Luo Y, Liu Y, Chen Y, Chen W, Liu J, Jiang Q, Zhao Y, Bi Z, Guo G, Yao Y, Xiang Y, Zhang X, Valencak TG, Wang Y, Wang X. mRNA m 5C inhibits adipogenesis and promotes myogenesis by respectively facilitating YBX2 and SMO mRNA export in ALYREF-m 5C manner. Cell Mol Life Sci 2022; 79:481. [PMID: 35962235 DOI: 10.1007/s00018-022-04474-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/16/2022] [Accepted: 07/04/2022] [Indexed: 11/25/2022]
Abstract
Although 5-methylcytosine (m5C) has been identified as a novel and abundant mRNA modification and associated with energy metabolism, its regulation function in adipose tissue and skeletal muscle is still limited. This study aimed at investigating the effect of mRNA m5C on adipogenesis and myogenesis using Jinhua pigs (J), Yorkshire pigs (Y) and their hybrids Yorkshire-Jinhua pigs (YJ). We found that Y grow faster than J and YJ, while fatness-related characteristics observed in Y were lower than those of J and YJ. Besides, total mRNA m5C levels and expression rates of NSUN2 were higher both in backfat layer (BL) and longissimus dorsi muscle (LDM) of Y compared to J and YJ, suggesting that higher mRNA m5C levels positively correlate with lower fat and higher muscle mass. RNA bisulfite sequencing profiling of m5C revealed tissue-specific and dynamic features in pigs. Functionally, hyper-methylated m5C-containing genes were enriched in pathways linked to impaired adipogenesis and enhanced myogenesis. In in vitro, m5C inhibited lipid accumulation and promoted myogenic differentiation. Furthermore, YBX2 and SMO were identified as m5C targets. Mechanistically, YBX2 and SMO mRNAs with m5C modification were recognized and exported into the cytoplasm from the nucleus by ALYREF, thus leading to increased YBX2 and SMO protein expression and thereby inhibiting adipogenesis and promoting myogenesis, respectively. Our work uncovered the critical role of mRNA m5C in regulating adipogenesis and myogenesis via ALYREF-m5C-YBX2 and ALYREF-m5C-SMO manners, providing a potential therapeutic target in the prevention and treatment of obesity, skeletal muscle dysfunction and metabolic disorder diseases.
Collapse
Affiliation(s)
- Youhua Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Ying Yang
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, College of Future Technology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,China National Center for Bioinformation, Hangzhou, China.,Institute of Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
| | - Ruifan Wu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Chun-Chun Gao
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, College of Future Technology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,China National Center for Bioinformation, Hangzhou, China.,Institute of Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
| | - Xing Liao
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xiao Han
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, College of Future Technology, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,China National Center for Bioinformation, Hangzhou, China.,Institute of Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
| | - Botao Zeng
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Chaoqun Huang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yaojun Luo
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yuxi Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yushi Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Wei Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Jiaqi Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Qin Jiang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yuanling Zhao
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Zhen Bi
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Guanqun Guo
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yongxi Yao
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Yun Xiang
- Jinhua Academy of Agricultural Sciences, Jinhua, China
| | - Xiaojun Zhang
- Jinhua Academy of Agricultural Sciences, Jinhua, China
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China.,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Xinxia Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China. .,Key Laboratory of Animal Nutrition and Feed Sciences, Ministry of Agriculture, Hangzhou, China. .,Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China. .,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China.
| |
Collapse
|
14
|
Xu W, Cao F, Zhao M, Fu X, Yin S, Sun Y, Valencak TG, Ren D. Macrophage activation by exopolysaccharides from Streptococcus thermophilus fermented milk through TLRs-mediated NF-κB and MAPK pathways. Int Immunopharmacol 2022; 108:108875. [DOI: 10.1016/j.intimp.2022.108875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 05/02/2022] [Accepted: 05/15/2022] [Indexed: 01/03/2023]
|
15
|
Hoffman JM, Song S, Brugger K, Valencak TG. Untapped research opportunities in China: promising future avenues and potential concerns for aging companion animals. GeroScience 2022; 44:1295-1299. [PMID: 34427857 PMCID: PMC9213577 DOI: 10.1007/s11357-021-00433-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/05/2021] [Indexed: 11/30/2022] Open
Abstract
Companion animals have recently been proposed as ideal translational models of human aging due to their shared susceptibility for certain diseases, similar environments, and sophisticated veterinary medicine diagnostics, all of which are not possible in rodent laboratory models. Here, we introduce and propose the study of companion animals in China as a largely untapped resource in academic and veterinary aging research. Pet ownership rates along with economic gains in the pet industry have skyrocketed over the last decade in China. Yet, the majority of research institutions still focus on agricultural animal research, not companion animals. In this perspective, we compare available pet ownership rates between the USA, the European Union, and China before focusing on the potential of companion animal aging research in China. In addition, we highlight some ethical considerations that must be addressed before large-scale companion animal aging research can be completed.
Collapse
Affiliation(s)
- Jessica M Hoffman
- Department of Biology, University of Alabama At Birmingham, Birmingham, AL, 35294, USA
| | - Shanshan Song
- 3000 Animal Hospital Center, 103 T5 EFC, Cangqian Street, Yuhang District, Hangzhou, Zhejiang, China
| | - Katharina Brugger
- Unit for Veterinary Public Health and Epidemiology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, China. .,Department of Biosciences, Paris Lodron University Salzburg, Salzburg, Austria.
| |
Collapse
|
16
|
Tang W, Zhong Y, Wei Y, Deng Z, Mao J, Liu J, Valencak TG, Liu J, Xu H, Wang H. Ileum tissue single-cell mRNA sequencing elucidates the cellular architecture of pathophysiological changes associated with weaning in piglets. BMC Biol 2022; 20:123. [PMID: 35637473 PMCID: PMC9153155 DOI: 10.1186/s12915-022-01321-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/06/2022] [Indexed: 11/19/2022] Open
Abstract
Background In mammals, transitioning from sole milk uptake to the intake of solid feed results in dramatic developmental changes in intestinal function and immunological status. In fact, weaning stress is often accompanied by intestinal inflammatory processes. To develop effective intervention strategies, it is necessary to characterize the developmental pattern and immune response that occurs on weaning, as we have done in this study for piglets. Results To comprehensively delineate cell heterogeneity in ileum tissues and the underlying mechanisms in weaning-induced intestinal inflammation of piglets, we have analyzed the transcriptomes of 42,149 cells from ileum mucosa of normally suckling and post-weaned piglets. There were 31 cell subtypes including epithelial, stromal, and immune cells. A bifurcating trajectory was inferred to separate secretory and absorptive lineages. Integrated cross-species datasets showed well-conserved cellular architectures and transcription signatures between human and pig. Comparative analyses of cellular components, cell–cell communications, and molecular states revealed that T cell subpopulations were significantly altered in weaned piglets. We found that T helper (Th) 17 functional plasticity across changes in the cytokine milieu and the enrichment of granzyme B (GZMB)-expressing cytotoxic T cells potentially exacerbate mucosal inflammation via mitochondrial dysfunction in epithelial cells. Conclusions Our work has elucidated the single-cell molecular characteristics of the piglet ileum before and after weaning. We have provided an atlas that portrays the landscape of the intestinal pathophysiological inflammatory process associated with weaning, finding a level of conservation between human and pig that support the use of piglets as a model for human infants. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-022-01321-3.
Collapse
Affiliation(s)
- Wenjie Tang
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Yifan Zhong
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Yusen Wei
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Zhaoxi Deng
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Jiangdi Mao
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Jingliang Liu
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Teresa G Valencak
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Jianxin Liu
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China
| | - Heping Xu
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, School of Life Sciences, Westlake University, Hangzhou, 310000, Zhejiang, China
| | - Haifeng Wang
- College of Animal Science, Zhejiang University, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, 310000, China.
| |
Collapse
|
17
|
Xu NN, Yang DT, Miao C, Valencak TG, Liu JX, Ren DX. Erratum to “Organic zinc supplementation in early-lactation dairy cows and its effects on zinc content and distribution in milk and cheese” (JDS Commun. 2:110–113). JDS Communications 2022; 3:166. [PMID: 36342889 PMCID: PMC9623777 DOI: 10.3168/jdsc.2022-3-2-166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
18
|
Liu S, Wang L, Ling D, Valencak TG, You W, Shan T. Potential key factors involved in regulating adipocyte dedifferentiation. J Cell Physiol 2021; 237:1639-1647. [PMID: 34796916 DOI: 10.1002/jcp.30637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 10/26/2021] [Accepted: 11/09/2021] [Indexed: 12/11/2022]
Abstract
Adipocytes are the key constituents of adipose tissue, and their de-differentiation process has been widely observed in physiological and pathological conditions. For obese people, the promotion of adipocyte de-differentiation or maintenance of an undifferentiated state of adipocytes may help to improve their metabolic condition. Thus, understanding the regulatory mechanisms of adipocyte de-differentiation is necessary for treating metabolic diseases. Attractively, in addition to intracellular signals regulating adipocyte de-differentiation, external factors such as temperature and pressure also affect adipocyte de-differentiation. In this review, we summarize the recent progress in the field and discuss the regulatory roles and mechanisms of involved endogenous and exogenous factors during the process of de-differentiation.
Collapse
Affiliation(s)
- Shiqi Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Liyi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Defeng Ling
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wenjing You
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, Zhejiang, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, Zhejiang, China
| |
Collapse
|
19
|
Wu JJ, Zhu S, Gu F, Valencak TG, Liu JX, Sun HZ. Cross-tissue single-cell transcriptomic landscape reveals the key cell subtypes and their potential roles in the nutrient absorption and metabolism in dairy cattle. J Adv Res 2021; 37:1-18. [PMID: 35499046 PMCID: PMC9039752 DOI: 10.1016/j.jare.2021.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/02/2021] [Accepted: 11/19/2021] [Indexed: 12/12/2022] Open
Abstract
Discover 55 cell types and their specific markers in the first single-cell atlas of cattle; Identify and verify 3 epithelial progenitor-like cell subtypes in the forestomach Reveal vital but nonimmune functions of neutrophils in the mammary gland; Uncover key cell subtypes with preferential nutrient uptake; Find Th17 cells regulate epithelial cells responding to nutrient transport in the forestomach.
Introduction Dairy cattle are a vitally important ruminant in meeting the demands for high-quality animal protein production worldwide. The complicated biological process of converting human indigestible biomass into highly digestible and nutritious milk is orchestrated by various tissues. However, poorly understanding of the cellular composition and function of the key metabolic tissues hinders the improvement of health and performance of domestic ruminants. Objectives The cellular heterogeneity, metabolic features, interactions across ten tissue types of lactating dairy cattle were studied at single-cell resolution in the current study. Methods Unbiased single-cell RNA-sequencing and analysis were performed on the rumen, reticulum, omasum, abomasum, ileum, rectum, liver, salivary gland, mammary gland, and peripheral blood of lactating dairy cattle. Immunofluorescences and fluorescence in situ hybridization were performed to verify cell identity. Results In this study, we constructed a single-cell landscape covering 88,013 high-quality (500 < genes < 4,000, UMI < 50, 000, and mitochondrial gene ratio < 40% or 15%) single cells and identified 55 major cell types in lactating dairy cattle. Our systematic survey of the gene expression profiles and metabolic features of epithelial cells related to nutrient transport revealed cell subtypes that have preferential absorption of different nutrients. Importantly, we found that T helper type 17 (Th17) cells (highly expressing CD4 and IL17A) were specifically enriched in the forestomach tissues and predominantly interacted with the epithelial cell subtypes with high potential uptake capacities of short-chain fatty acids through IL-17 signaling. Furthermore, the comparison between IL17RAhighIL17RChigh cells (epithelial cells with IL17RA and IL17RC expression levels both greater than 0.25) and other cells explained the importance of Th17 cells in regulating the epithelial cellular transcriptional response to nutrient transport in the forestomach. Conclusion The findings enhance our understanding of the cellular biology of ruminants and open new avenues for improved animal production of dairy cattle.
Collapse
Affiliation(s)
- Jia-Jin Wu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Senlin Zhu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Fengfei Gu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
| | - Teresa G. Valencak
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jian-Xin Liu
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China
| | - Hui-Zeng Sun
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou 310058, China
- Ministry of Education Innovation Team of Development and Function of Animal Digestive System, Zhejiang University, Hangzhou 310058, China
- Corresponding author at: Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
20
|
Xu Z, Chen W, Wang L, Zhou Y, Nong Q, Valencak TG, Wang Y, Xie J, Shan T. Cold Exposure Affects Lipid Metabolism, Fatty Acids Composition and Transcription in Pig Skeletal Muscle. Front Physiol 2021; 12:748801. [PMID: 34690816 PMCID: PMC8526723 DOI: 10.3389/fphys.2021.748801] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/16/2021] [Indexed: 01/05/2023] Open
Abstract
Cold exposure promotes glucose oxidation and modulates the lipid metabolism in adipose tissue, but it is still not fully clear whether cold exposure could affect meat quality and fatty acid metabolism in skeletal muscle of pig in vivo. Here, we kept finishing pigs under cold or room temperature overnight and determined the effects of cold exposure on meat quality, fatty acids composition and transcriptional changes in skeletal muscle of pigs. We found that cold exposure significantly reduced the meat colour24 h and pH24 h, without affecting carcass characteristics and other meat quality traits. Considerable changes were found in the proportions of individual fatty acids and the total content of saturated fatty acid, polyunsaturated fatty acids, monounsaturated fatty acid and n3-fatty acids. RNA-seq results showed upregulated fatty acid biosynthesis genes and downregulated mitochondrial beta-oxidation genes. The lipid metabolism in cold-treated longissimus dorsi muscle might be regulated by functions of the lipoprotein particle, the extracellular matrix, and the PPAR signaling pathways. Our study revealed the potential of cold exposure to regulate the lipid metabolism and fatty acid composition in skeletal muscle of farmed animals.
Collapse
Affiliation(s)
- Ziye Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Wentao Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Liyi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Yanbing Zhou
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Qiuyun Nong
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Jintang Xie
- Shandong Chunteng Food Co., Ltd., Zaozhuang, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| |
Collapse
|
21
|
Affiliation(s)
- Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, China; Department of Biosciences, Paris Lodron University Salzburg, Salzburg, Austria.
| | - Jessica M Hoffman
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| |
Collapse
|
22
|
Valencak TG, Csiszar A, Szalai G, Podlutsky A, Tarantini S, Fazekas-Pongor V, Papp M, Ungvari Z. Animal reservoirs of SARS-CoV-2: calculable COVID-19 risk for older adults from animal to human transmission. GeroScience 2021; 43:2305-2320. [PMID: 34460063 PMCID: PMC8404404 DOI: 10.1007/s11357-021-00444-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 08/17/2021] [Indexed: 12/19/2022] Open
Abstract
The current COVID-19 pandemic, caused by the highly contagious respiratory pathogen SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), has already claimed close to three million lives. SARS-CoV-2 is a zoonotic disease: it emerged from a bat reservoir and it can infect a number of agricultural and companion animal species. SARS-CoV-2 can cause respiratory and intestinal infections, and potentially systemic multi-organ disease, in both humans and animals. The risk for severe illness and death with COVID-19 significantly increases with age, with older adults at highest risk. To combat the pandemic and protect the most susceptible group of older adults, understanding the human-animal interface and its relevance to disease transmission is vitally important. Currently high infection numbers are being sustained via human-to-human transmission of SARS-CoV-2. Yet, identifying potential animal reservoirs and potential vectors of the disease will contribute to stronger risk assessment strategies. In this review, the current information about SARS-CoV-2 infection in animals and the potential spread of SARS-CoV-2 to humans through contact with domestic animals (including dogs, cats, ferrets, hamsters), agricultural animals (e.g., farmed minks), laboratory animals, wild animals (e.g., deer mice), and zoo animals (felines, non-human primates) are discussed with a special focus on reducing mortality in older adults.
Collapse
Affiliation(s)
- Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, China.
- Department of Biosciences, Paris Lodron University Salzburg, Hellbrunnerstrasse 34, 5020, Salzburg, Austria.
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Gabor Szalai
- Department of Biomedical Sciences, Burrell College of Osteopathic Medicine, Las Cruces, NM, USA
| | - Andrej Podlutsky
- Institute of Arctic Biology, University of Alaska, Fairbanks, AK, USA
| | - Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vince Fazekas-Pongor
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Magor Papp
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| |
Collapse
|
23
|
Wang S, Kai L, Zhu L, Xu B, Chen N, Valencak TG, Wang Y, Shan T. Cathelicidin-WA Protects Against LPS-Induced Gut Damage Through Enhancing Survival and Function of Intestinal Stem Cells. Front Cell Dev Biol 2021; 9:685363. [PMID: 34381773 PMCID: PMC8350165 DOI: 10.3389/fcell.2021.685363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/25/2021] [Indexed: 12/22/2022] Open
Abstract
Preservation of intestinal stem cells (ISCs) plays a critical role in initiating epithelial regeneration after intestinal injury. Cathelicidin peptides have been shown to participate in regulating intestinal damage repair. However, it is not known how exactly Cathelicidin-WA (CWA) exert its function after tissue damage. Using a gut injury model in mice involving Lipopolysaccharide (LPS), we observed that CWA administration significantly improved intestinal barrier function, preserved ISCs survival, and augmented ISCs viability within the small intestine (SI) under LPS treatment. In addition, CWA administration effectively prevented proliferation stops and promoted the growth of isolated crypts. Mechanistically, our results show that the appearance of γH2AX was accompanied by weakened expression of SETDB1, a gene that has been reported to safeguard genome stability. Notably, we found that CWA significantly rescued the decreased expression of SETDB1 and reduced DNA damage after LPS treatment. Taken together, CWA could protect against LPS-induced gut damage through enhancing ISCs survival and function. Our results suggest that CWA may become an effective therapeutic regulator to treat intestinal diseases and infections.
Collapse
Affiliation(s)
- Sisi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Lixia Kai
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Luoyi Zhu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Bocheng Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Nana Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| |
Collapse
|
24
|
Abstract
In every population across the world, women live significantly longer than men; however, the underlying physiological processes that drive these sex differences in age-specific mortality are largely unknown. Recently, the role of adipose tissue in aging and longevity has been a focus of biomedical research in both humans and rodent models. Specifically, brown adipose tissue, a thermoregulatory tissue originally thought to not exist past infancy in humans, has been shown to potentially play a role in health throughout the lifespan. Females have larger adult brown adipose depots that are not just larger in size but also more efficient in non-shivering thermogenesis. This improved functioning of the brown adipose tissue may potentially lead to improved female health, and we hypothesize that this advantage may be of even bigger significance in the older population. Here, we briefly review what is known about sex differences in aging and how sex differences in brown adipose tissue may be contributing to the female lifespan advantage. These questions have usually been addressed in large experimental studies in rodents as a translational model of human aging. Overall, we propose that a better understanding of the thermogenesis-metabolism nexus is necessary in biomedical research, and sex differences in these factors may contribute to the female longevity bias seen in human populations.
Collapse
Affiliation(s)
- Jessica M Hoffman
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., CH464, Birmingham, AL, 35294, USA.
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, 310058, Hangzhou, PR China.
| |
Collapse
|
25
|
Pabis K, Chiari Y, Sala C, Straka E, Giacconi R, Provinciali M, Li X, Brown-Borg H, Nowikovsky K, Valencak TG, Gundacker C, Garagnani P, Malavolta M. Elevated metallothionein expression in long-lived species mediates the influence of cadmium accumulation on aging. GeroScience 2021; 43:1975-1993. [PMID: 34117600 DOI: 10.1007/s11357-021-00393-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 05/24/2021] [Indexed: 11/29/2022] Open
Abstract
Cadmium (Cd) accumulates with aging and is elevated in long-lived species. Metallothioneins (MTs), small cysteine-rich proteins involved in metal homeostasis and Cd detoxification, are known to be related to longevity. However, the relationship between Cd accumulation, the role of MTs, and aging is currently unclear. Specifically, we do not know if long-lived species evolved an efficient metal stress response by upregulating their MT levels to reduce the toxic effects of environmental pollutants, such as Cd, that accumulate over their longer life span. It is also unknown if the number of MT genes, their expression, or both protect the organisms from potentially damaging effects during aging. To address these questions, we reanalyzed several cross-species studies and obtained data on MT expression and Cd accumulation in long-lived mouse models. We confirmed a relationship between species maximum life span in captive mammals and their Cd content in liver and kidney. We found that although the number of MT genes does not affect longevity, gene expression and protein amount of specific MT paralogs are strongly related to life span in mammals. MT expression rather than gene number may influence the high Cd levels and longevity of some species. In support of this, we found that overexpression of MT-1 accelerated Cd accumulation in mice and that tissue Cd was higher in long-lived mouse strains with high MT expression. We conclude that long-lived species have evolved a more efficient stress response by upregulating the expression of MT genes in presence of Cd, which contributes to elevated tissue Cd levels.
Collapse
Affiliation(s)
- Kamil Pabis
- Center for Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Währinger Strasse 10, 1090, Wien, Vienna, Austria
| | - Ylenia Chiari
- Department of Biology, George Mason University, Fairfax, VA, 22030, USA
| | - Claudia Sala
- Department of Physics and Astronomy, University of Bologna, 40126, Bologna, Italy
| | - Elisabeth Straka
- Center for Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Währinger Strasse 10, 1090, Wien, Vienna, Austria
| | - Robertina Giacconi
- Advanced Technology Center for Aging Research, IRCCS INRCA, 60121, Ancona, Italy
| | - Mauro Provinciali
- Advanced Technology Center for Aging Research, IRCCS INRCA, 60121, Ancona, Italy
| | - Xinna Li
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, 48109, USA
| | - Holly Brown-Borg
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, 58203, USA
| | - Karin Nowikovsky
- Department of Internal Medicine I and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Teresa G Valencak
- Department of Animal Science and Technology, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Claudia Gundacker
- Center for Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Währinger Strasse 10, 1090, Wien, Vienna, Austria
| | - Paolo Garagnani
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), and Interdepartmental Centre "L. Galvani" (CIG), University of Bologna, Bologna, Italy.,Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Marco Malavolta
- Advanced Technology Center for Aging Research, IRCCS INRCA, 60121, Ancona, Italy.
| |
Collapse
|
26
|
Liu J, Li J, Chen W, Xie X, Chu X, Valencak TG, Wang Y, Shan T. Comprehensive evaluation of the metabolic effects of porcine CRTC3 overexpression on subcutaneous adipocytes with metabolomic and transcriptomic analyses. J Anim Sci Biotechnol 2021; 12:19. [PMID: 33653408 PMCID: PMC7927250 DOI: 10.1186/s40104-021-00546-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 01/04/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Meat quality is largely driven by fat deposition, which is regulated by several genes and signaling pathways. The cyclic adenosine monophosphate (cAMP) -regulated transcriptional coactivator 3 (CRTC3) is a coactivator of cAMP response element binding protein (CREB) that mediates the function of protein kinase A (PKA) signaling pathway and is involved in various biological processes including lipid and energy metabolism. However, the effects of CRTC3 on the metabolome and transcriptome of porcine subcutaneous adipocytes have not been studied yet. Here, we tested whether porcine CRTC3 expression would be related to fat deposition in Heigai pigs (a local fatty breed in China) and Duroc×Landrace×Yorkshire (DLY, a lean breed) pigs in vivo. The effects of adenovirus-induced CRTC3 overexpression on the metabolomic and transcriptomic profiles of subcutaneous adipocytes were also determined in vitro by performing mass spectrometry-based metabolomics combined with RNA sequencing (RNA-seq). RESULTS Porcine CRTC3 expression is associated with fat deposition in vivo. In addition, CRTC3 overexpression increased lipid accumulation and the expression of mature adipocyte-related genes in cultured porcine subcutaneous adipocytes. According to the metabolomic analysis, CRTC3 overexpression induced significant changes in adipocyte lipid, amino acid and nucleotide metabolites in vitro. The RNA-seq analysis suggested that CRTC3 overexpression alters the expression of genes and pathways involved in adipogenesis, fatty acid metabolism and glycerophospholipid metabolism in vitro. CONCLUSIONS We identified significant alterations in the metabolite composition and the expression of genes and pathways involved in lipid metabolism in CRTC3-overexpressing adipocytes. Our results suggest that CRTC3 might play an important regulatory role in lipid metabolism and thus affects lipid accumulation in porcine subcutaneous adipocytes.
Collapse
Affiliation(s)
- Jiaqi Liu
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, 866 Yuhangtang Road, Hangzhou, China
| | - Jie Li
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, 866 Yuhangtang Road, Hangzhou, China
| | - Wentao Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, 866 Yuhangtang Road, Hangzhou, China
| | - Xintao Xie
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Xingang Chu
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, 866 Yuhangtang Road, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, 866 Yuhangtang Road, Hangzhou, China
| |
Collapse
|
27
|
Hoffman JM, Kiklevich JV, Klavins K, Valencak TG, Austad SN. Alterations of Lipid Metabolism With Age and Weight in Companion Dogs. J Gerontol A Biol Sci Med Sci 2021; 76:400-405. [PMID: 32750116 PMCID: PMC7907484 DOI: 10.1093/gerona/glaa186] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Indexed: 01/02/2023] Open
Abstract
The companion dog has recently been promoted as powerful translational model of aging. However, while dogs share environments with their human owners and develop many of the same age-related morbidities, little is known about the underlying mechanisms that drive their health and longevity. In addition, dogs have a well described phenotypic pattern in which small dogs live significantly longer than large dogs, such that weight can be used as a crude proxy for longevity. To investigate this pattern, we completed a small lipidomics study on 41 dogs in the Birmingham, Alabama, United States, area to determine individual circulating lipids that were associated with age and body weight. We discovered that sphingomyelins were significantly higher in large, short-lived dogs, independent of age, and triglycerides were higher in older dogs of all sizes. Our results point towards physiological differences that may explain a portion of the variation in longevity seen in companion dogs.
Collapse
Affiliation(s)
| | | | - Kristaps Klavins
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Teresa G Valencak
- College of Animal Science, Zhejiang University, Hangzhou, P.R. China
| | | |
Collapse
|
28
|
Xu Z, You W, Chen W, Zhou Y, Nong Q, Valencak TG, Wang Y, Shan T. Single-cell RNA sequencing and lipidomics reveal cell and lipid dynamics of fat infiltration in skeletal muscle. J Cachexia Sarcopenia Muscle 2021; 12:109-129. [PMID: 33244879 PMCID: PMC7890272 DOI: 10.1002/jcsm.12643] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/23/2020] [Accepted: 10/12/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Ageing is accompanied by sarcopenia and intramuscular fat (IMAT) infiltration. In skeletal muscle, fat infiltration is a common feature in several myopathies and is associated with muscular dysfunction and insulin resistance. However, the cellular origin and lipidomic and transcriptomic changes during fat infiltration in skeletal muscle remain unclear. METHODS In the current study, we generated a high IMAT-infiltrated skeletal muscle model by glycerol (GLY) injection. Single-cell RNA sequencing and lineage tracing were performed on GLY-injured skeletal muscle at 5 days post-injection (DPI) to identify the cell origins and dynamics. Lipidomics and RNA sequencing were performed on IMAT-infiltrated skeletal muscle at 14 DPI (or 17 DPI for the cold treatment) to analyse alterations of lipid compositions and gene expression levels. RESULTS We identified nine distinct major clusters including myeloid-derived cells (52.13%), fibroblast/fibro/adipogenic progenitors (FAPs) (23.24%), and skeletal muscle stem cells (2.02%) in GLY-injured skeletal muscle. Clustering and pseudotemporal trajectories revealed six subpopulations in fibroblast/FAPs and 10 subclusters in myeloid-derived cells. A subpopulation of myeloid-derived cells expressing adipocyte-enriched genes and Pdgfra- /Cd68+ cells displayed lipid droplets upon adipogenic induction, indicating their adipogenic potential. Lipidomic analysis revealed the changes of overall lipid classes composition (e.g. triglycerides (TAGs) increased by 19.3 times, P = 0.0098; sulfoquinovosyl diacylglycerol decreased by 83%, P = 0.0056) and in the distribution of lipids [e.g. TAGs (18:2/18:2/22:6) increased by 181.6 times, P = 0.021] between GLY-group and saline control. RNA-seq revealed 1847 up-regulated genes and 321 down-regulated genes and significant changes in lipid metabolism-related pathways (e.g. glycerolipid pathway and glycerophospholipid pathway) in our model of GLY-injured skeletal muscle. Notably, short-term cold exposure altered fatty acid composition (e.g. saturated fatty acid decreased by 6.4%, P = 0.058) in fat-infiltrated muscles through directly affecting lipid metabolism pathways including PI3K-AKT and MAPK signalling pathway. CONCLUSIONS Our results showed that a subpopulation of myeloid-derived cells may contribute to IMAT infiltration. GLY-induced IMAT infiltration changed the lipid composition and gene expression profiles. Short-term cold exposure might regulate lipid metabolism and its related signalling pathways in fat-infiltrated muscle. Our study provides a comprehensive resource describing the molecular signature of fat infiltration in skeletal muscle.
Collapse
Affiliation(s)
- Ziye Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Wenjing You
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Wentao Chen
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Yanbing Zhou
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Qiuyun Nong
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Teresa G Valencak
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Key Laboratory of Molecular Animal Nutrition (Zhejiang University), Ministry of Education, Hangzhou, China.,Laboratory of Animal Feed and Nutrition of Zhejiang Province, Hangzhou, China
| |
Collapse
|
29
|
Ohrnberger SA, Hambly C, Speakman JR, Valencak TG. Limits to sustained energy intake. XXXII. Hot again: dorsal shaving increases energy intake and milk output in golden hamsters ( Mesocricetus auratus). J Exp Biol 2020; 223:jeb230383. [PMID: 33188060 DOI: 10.1242/jeb.230383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 11/09/2020] [Indexed: 12/16/2022]
Abstract
Golden hamsters have four times the body size of mice, raise very large litters and are required to produce large quantities of milk during the 18-day lactation period. We have previously proposed that they may be prone to being limited by their heat dissipation capacity. Studies where lactating females are shaved to elevate their heat dissipation capacity have yielded conflicting data so far. With their short pregnancy of ∼18 days, the large litters and the reported high skin temperatures, they may serve as an ideal model to elucidate the role of epilation for energy budgets in lactating mammals. We shaved one group of lactating females dorsally on the sixth day of lactation, and tested if the elevated heat dissipation capacity would enable them to have higher energy intakes and better food-to-milk conversion rates. Indeed, we observed that females from the shaved group had 6% higher body mass and 0.78°C lower skin temperature than control females during lactation. When focusing on the phase of peak lactation, we observed significantly higher (10%) gross energy intake of food and 23.4% more milk energy output in the shaved females, resulting in 3.3 g higher individual pup weights. We conclude that shaving off the females' fur, even though restricted to the dorsal surface, had large consequences on female energy metabolism in lactation and improved milk production and pup growth in line with our previous work on heat dissipation limitation. Our new data from golden hamsters confirm heat dissipation as a limiting factor for sustained metabolic rate in lactation in some small mammals and emphasise the large effects of a relatively small manipulation such as fur removal on energy metabolism of lactating females.
Collapse
Affiliation(s)
- S A Ohrnberger
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, A-1210 Vienna, Austria
| | - C Hambly
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - J R Speakman
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
- Institute of Genetics and Developmental Biology, State Key Laboratory of Molecular Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
- CAS Center of Excellence in Animal Evolution and Genetics, Kunming 650223, China
| | - T G Valencak
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, A-1210 Vienna, Austria
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, 310058 Hangzhou, People's Republic of China
| |
Collapse
|
30
|
Li S, Yang Y, Chen C, Li L, Valencak TG, Ren D. Differences in milk fat globule membrane proteins among Murrah, Nili-Ravi and Mediterranean buffaloes revealed by a TMT proteomic approach. Food Res Int 2020; 139:109847. [PMID: 33509470 DOI: 10.1016/j.foodres.2020.109847] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/21/2020] [Accepted: 10/22/2020] [Indexed: 12/19/2022]
Abstract
Milk fat globule membrane (MFGM) proteins contribute to human nutrition and health. However, differences in MFGM proteome among the buffalo breeds are unknown. In this study, MFGM proteins from Murrah, Nili-Ravi and Mediterranean buffaloes were identified using a tandem mass tag proteomic approach to characterize the components and their potential activities. A total of 1258 MFGM proteins were identified and 103 differentially expressed proteins were found in the studied buffalo breeds. Of these, toll-like receptor 2 had higher abundance in Mediterranean milk; endoplasmic reticulum resident protein 29 had higher levels in Nili-Ravi milk; uromodulin had higher abundance in Murrah milk. A number of 781 newly proteins in buffalo milk exerted antioxidant, antibacterial, and anti-inflammatory activities. Our findings reveal the component complexity and functional diversity of MFGM proteins in different buffalo breeds. Thus, our data may path the way to promote raw buffalo milk as a healthy and functional dairy product.
Collapse
Affiliation(s)
- Shanshan Li
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310029, PR China
| | - Yongxin Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, PR China
| | - Chen Chen
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310029, PR China
| | - Ling Li
- Guangxi Key Laboratory of Buffalo Genetics, Reproduction and Breeding, Water Buffalo Institute, Nanning 530001, PR China
| | - Teresa G Valencak
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310029, PR China.
| | - Daxi Ren
- Institute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou 310029, PR China.
| |
Collapse
|
31
|
Csiszar A, Jakab F, Valencak TG, Lanszki Z, Tóth GE, Kemenesi G, Tarantini S, Fazekas-Pongor V, Ungvari Z. Companion animals likely do not spread COVID-19 but may get infected themselves. GeroScience 2020; 42:1229-1236. [PMID: 32766998 PMCID: PMC7410515 DOI: 10.1007/s11357-020-00248-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/31/2020] [Indexed: 12/20/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) is a highly contagious infectious disease caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). From the epidemiological data, the picture emerges that the more severe etiopathologies among COVID-19 patients are found in elderly people. The risk of death due to COVID-19 increases exponentially with age. Eight out of 10 COVID-19 related deaths occur in people older than 65 years of age. Older patients with comorbid conditions such as hypertension, heart failure, diabetes mellitus, asthma, chronic obstructive pulmonary disease, and cancer have a much higher case fatality rate. Governments and public health authorities all over the world have realized that protections of vulnerable older adults should be a priority during the COVID-19 pandemic. COVID-19 is a zoonotic disease. The SARS-CoV-2 virus was originally transmitted likely from a bat or a pangolin to humans. Recent evidence suggests that SARS-CoV-2, similar to other coronaviruses, can infect several species of animals, including companion animals such as dogs, cats, and ferrets although their viral loads remain low. While the main source of infection transmission therefore is human to human, there are a few rare cases of pets contracting the infection from a SARS-CoV-2-infected human. Although there is no evidence that pets actively transmit SARS-CoV-2 via animal-to-human transmission, senior pet ownership potentially may pose a small risk to older adults by (1) potentially enabling animal-to-human transmission of SARS-CoV-2 in the most vulnerable population and (2) by increasing the exposition risk for the elderly due to the necessity to care for the pet and, in the case of dogs, to take them outside the house several times per day. In this overview, the available evidence on SARS-CoV-2 infection in pets is considered and the potential for spread of COVID-19 from companion animals to older individuals and the importance of prevention are discussed.
Collapse
Affiliation(s)
- Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging/Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Theoretical Medicine Doctoral School/Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Ferenc Jakab
- Szentágothai Research Center, Virological Research Group, University of Pécs, Pécs, Hungary
- Faculty of Sciences, Institute of Biology, University of Pécs, Pécs, Hungary
- National Coronavirus Research Center, University of Pécs, Pécs, Hungary
| | | | - Zsófia Lanszki
- Szentágothai Research Center, Virological Research Group, University of Pécs, Pécs, Hungary
- Faculty of Sciences, Institute of Biology, University of Pécs, Pécs, Hungary
- National Coronavirus Research Center, University of Pécs, Pécs, Hungary
| | - Gábor Endre Tóth
- Szentágothai Research Center, Virological Research Group, University of Pécs, Pécs, Hungary
- Faculty of Sciences, Institute of Biology, University of Pécs, Pécs, Hungary
- National Coronavirus Research Center, University of Pécs, Pécs, Hungary
| | - Gábor Kemenesi
- Szentágothai Research Center, Virological Research Group, University of Pécs, Pécs, Hungary
- Faculty of Sciences, Institute of Biology, University of Pécs, Pécs, Hungary
- National Coronavirus Research Center, University of Pécs, Pécs, Hungary
| | - Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging/Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA
- International Training Program in Geroscience, Theoretical Medicine Doctoral School/Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Vince Fazekas-Pongor
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Reynolds Oklahoma Center on Aging/Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 975 NE 10th Street, BRC 1311, Oklahoma City, OK, 73104, USA.
- International Training Program in Geroscience, Theoretical Medicine Doctoral School/Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary.
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary.
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
| |
Collapse
|
32
|
You W, Xu Z, Sun Y, Valencak TG, Wang Y, Shan T. GADD45α drives brown adipose tissue formation through upregulating PPARγ in mice. Cell Death Dis 2020; 11:585. [PMID: 32719383 PMCID: PMC7385159 DOI: 10.1038/s41419-020-02802-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 02/07/2023]
Abstract
Stress can lead to obesity and metabolic dysfunction, but the underlying mechanisms are unclear. Here we identify GADD45α, a stress-inducible histone folding protein, as a potential regulator for brown adipose tissue biogenesis. Unbiased transcriptomics data indicate a positive correlation between adipose Gadd45a mRNA level and obesity. At the cellular level, Gadd45a knockdown promoted proliferation and lipolysis of brown adipocytes, while Gadd45a overexpression had the opposite effects. Consistently, using a knockout (Gadd45a−/−) mouse line, we found that GADD45α deficiency inhibited lipid accumulation and promoted expression of thermogenic genes in brown adipocytes, leading to improvements in insulin sensitivity, glucose uptake, energy expenditure. At the molecular level, GADD45α deficiency increased proliferation through upregulating expression of cell cycle related genes. GADD45α promoted brown adipogenesis via interacting with PPARγ and upregulating its transcriptional activity. Our new data suggest that GADD45α may be targeted to promote non-shivering thermogenesis and metabolism while counteracting obesity.
Collapse
Affiliation(s)
- Wenjing You
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Ziye Xu
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Ye Sun
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | | | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China.,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, China. .,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Hangzhou, China. .,Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China.
| |
Collapse
|
33
|
Abstract
As average human lifespans increase across the globe, companion animals, specifically dogs and cats, are also living longer with more age-related morbidities. However, a similar trend is not seen in mammalian livestock species. Cows, pigs, goats, and sheep, as well as more niche mammalian species raised across the world, have been primarily raised for their economic benefit to humans and are culled from the population once their production declines. To this end, we lack clear knowledge about the age-related morbidities and causes of death that afflict livestock animals due to natural aging, as well as detailed age-specific survival rates. Here, we review the current state of the field of agricultural mammal aging, as well as provide specific questions and directions that may provide novel resources for veterinarians and aging biologists. By raising awareness of the overall quality of life and ongoing health of individual livestock animals, we can potentially increase production into older life stages, leading to decreased costs to farmers and improved welfare for the animals themselves.
Collapse
Affiliation(s)
- Jessica M. Hoffman
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd.,CH464, Birmingham, AL 35294 USA
| | - Teresa G. Valencak
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou, 310058 People’s Republic of China
| |
Collapse
|
34
|
Valencak TG, Spenlingwimmer T, Nimphy R, Reinisch I, Hoffman JM, Prokesch A. Challenging a "Cushy" Life: Potential Roles of Thermogenesis and Adipose Tissue Adaptations in Delayed Aging of Ames and Snell Dwarf Mice. Metabolites 2020; 10:E176. [PMID: 32365727 PMCID: PMC7281452 DOI: 10.3390/metabo10050176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/23/2020] [Accepted: 04/27/2020] [Indexed: 02/07/2023] Open
Abstract
Laboratory mouse models with genetically altered growth hormone (GH) signaling and subsequent endocrine disruptions, have longer lifespans than control littermates. As such, these mice are commonly examined to determine the role of the somatotropic axis as it relates to healthspan and longevity in mammals. The two most prominent mouse mutants in this context are the genetically dwarf Ames and Snell models which have been studied extensively for over two decades. However, it has only been proposed recently that both white and brown adipose tissue depots may contribute to their delayed aging. Here we review the current state of the field and supplement it with recent data from our labs.
Collapse
Affiliation(s)
- Teresa G. Valencak
- College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou 310058, China
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria; (T.S.); (R.N.)
| | - Tanja Spenlingwimmer
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria; (T.S.); (R.N.)
| | - Ricarda Nimphy
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria; (T.S.); (R.N.)
| | - Isabel Reinisch
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Medical University of Graz, Neue Stiftingtalstrasse 6, 8010 Graz, Austria; (I.R.); (A.P.)
| | - Jessica M. Hoffman
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd., CH464, Birmingham, AL 35294, USA;
| | - Andreas Prokesch
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Medical University of Graz, Neue Stiftingtalstrasse 6, 8010 Graz, Austria; (I.R.); (A.P.)
- BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
| |
Collapse
|
35
|
Lenzhofer N, Ohrnberger SA, Valencak TG. n-3 polyunsaturated fatty acids as modulators of thermogenesis in Ames dwarf mice. GeroScience 2020; 42:897-907. [PMID: 32065332 DOI: 10.1007/s11357-019-00148-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 12/13/2019] [Indexed: 01/19/2023] Open
Abstract
Lipids, commonly split into saturated and mono- and polyunsaturated fatty acids, are key constituents of all biological membranes, and their exact proportions in different tissues were previously shown to be related to lifespan in mammals. As a mechanism, it was put forward that long-chain and highly unsaturated n-3 fatty acids may act as "pacemakers" in membranes while the n-6 fatty acid class may act as a counterbalance. Previously, long-lived Ames dwarf mice (Prop1 df/df) were found to have lower n-3 fatty acids and higher n-6 throughout their tissues. We exposed 32 adult (8 months old) Ames dwarf mice to three isocaloric diets differing in their fatty acid composition (saturated vs. rich in n-3 and n-6) for 2 months while measuring their body masses, subcutaneous body temperatures and finally membrane fatty acid profiles. Prominently, we found that individuals from all three groups quickly increased their body masses by ca. 20% and had 0.45 °C higher subcutaneous body temperatures than at baseline (F1,12,16 = 22.27; p < 0.001). Conceivably, experimental diets also largely reflected lipid composition found in the tissues with over 50% n-3 fatty acids in heart phospholipids from animals from the n-3-enriched feeding group. Our study indicates that fatty acid-enriched diets well affected body mass, subcutaneous body temperature and membrane fatty acid composition in Ames dwarf mice with no visible adverse effects on their health. Experimental feeding increased subcutaneous body fat and insulation, most likely explaining the higher subcutaneous temperatures.
Collapse
Affiliation(s)
- Nadine Lenzhofer
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Savoyenstrasse 1, A-1160, Vienna, Austria
| | - Sarah A Ohrnberger
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Veterinärplatz 1, A-1210, Vienna, Austria
| | - Teresa G Valencak
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Savoyenstrasse 1, A-1160, Vienna, Austria. .,Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine, Veterinärplatz 1, A-1210, Vienna, Austria. .,College of Animal Sciences, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China.
| |
Collapse
|
36
|
Ohrnberger SA, Brinkmann K, Palme R, Valencak TG. Dorsal shaving affects concentrations of faecal cortisol metabolites in lactating golden hamsters. Naturwissenschaften 2018; 105:13. [PMID: 29335818 PMCID: PMC5769818 DOI: 10.1007/s00114-017-1536-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 12/20/2017] [Accepted: 12/22/2017] [Indexed: 11/04/2022]
Abstract
Breeding of golden hamsters is classically performed at thermal conditions ranging from 20 to 24 °C. However, growing evidence suggests that lactating females suffer from heat stress. We hypothesised that shaving females dorsally to maximise heat dissipation may reduce stress during reproduction. We thus compared faecal cortisol metabolites (FCM) from shaved golden hamster mothers with those from unshaved controls. We observed significantly lower FCM levels in the shaved mothers (F1,22 = 8.69, p = 0.0075) pointing to lower stress due to ameliorated heat dissipation over the body surface. In addition, we observed 0.4 °C lower mean subcutaneous body temperatures in the shaved females, although this effect did not reach significance (F1,22 = 1.86, p = 0.18). Our results suggest that golden hamsters having body masses being more than four times that of laboratory mice provide a very interesting model to study aspects of lactation and heat production at the same time.
Collapse
Affiliation(s)
- Sarah A Ohrnberger
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria.
| | - Katharina Brinkmann
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Rupert Palme
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Teresa G Valencak
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| |
Collapse
|
37
|
Valencak TG, Osterrieder A, Schulz TJ. Sex matters: The effects of biological sex on adipose tissue biology and energy metabolism. Redox Biol 2017; 12:806-813. [PMID: 28441629 PMCID: PMC5406544 DOI: 10.1016/j.redox.2017.04.012] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 04/08/2017] [Indexed: 02/07/2023] Open
Abstract
Adipose tissue is a complex and multi-faceted organ. It responds dynamically to internal and external stimuli, depending on the developmental stage and activity of the organism. The most common functional subunits of adipose tissue, white and brown adipocytes, regulate and respond to endocrine processes, which then determine metabolic rate as well as adipose tissue functions. While the molecular aspects of white and brown adipose biology have become clearer in the recent past, much less is known about sex-specific differences in regulation and deposition of adipose tissue, and the specific role of the so-called pink adipocytes during lactation in females. This review summarises the current understanding of adipose tissue dynamics with a focus on sex-specific differences in adipose tissue energy metabolism and endocrine functions, focussing on mammalian model organisms as well as human-derived data. In females, pink adipocytes trans-differentiate during pregnancy from subcutaneous white adipocytes and are responsible for milk-secretion in mammary glands. Overlooking biological sex variation may ultimately hamper clinical treatments of many aspects of metabolic disorders.
Collapse
Affiliation(s)
- Teresa G Valencak
- Institute of Physiology, Pathophysiology and Biophysics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, A-1210 Vienna, Austria.
| | - Anne Osterrieder
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane, Headington, Oxford OX3 0BP, UK.
| | - Tim J Schulz
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, 114-116, Arthur-Scheunert-Allee, 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany.
| |
Collapse
|
38
|
Abstract
The mouse has rapidly become the mammalian model organism of choice in ageing research due to its relatively short lifespan, the proximity of its genome and physiology to humans, and most importantly due to its genetic pliability and the availability of mutant strains. Mouse models have provided great insights into the ageing process, which in its broadest sense is the progressive decline of body functions over time. In this mini-review, we briefly cover the historical views on the link between ageing and metabolic rate, highlight genetically modified transgenic mouse models of extended lifespan, discuss endocrine pathways linked to senescence and ageing, and then examine pathways by which caloric restriction is postulated to result in longevity.
Collapse
Affiliation(s)
- Vian Azzu
- Department of Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | | |
Collapse
|
39
|
Ohrnberger SA, Monclús R, Rödel HG, Valencak TG. Ambient temperature affects postnatal litter size reduction in golden hamsters. Front Zool 2016; 13:51. [PMID: 27904644 PMCID: PMC5121935 DOI: 10.1186/s12983-016-0183-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 11/15/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To better understand how different ambient temperatures during lactation affect survival of young, we studied patterns of losses of pups in golden hamsters (Mesocricetus auratus) at different ambient temperatures in the laboratory, mimicking temperature conditions in natural habitats. Golden hamsters produce large litters of more than 10 young but are also known to wean fewer pups at the end of lactation than they give birth to. We wanted to know whether temperature affects litter size reductions and whether the underlying causes of pup loss were related to maternal food (gross energy) intake and reproductive performance, such as litter growth. For that, we exposed lactating females to three different ambient temperatures and investigated associations with losses of offspring between birth and weaning. RESULTS Overall, around one third of pups per litter disappeared, obviously consumed by the mother. Such litter size reductions were greatest at 30 °C, in particular during the intermediate postnatal period around peak lactation. Furthermore, litter size reductions were generally higher in larger litters. Maternal gross energy intake was highest at 5 °C suggesting that mothers were not limited by milk production and might have been able to raise a higher number of pups until weaning. This was further supported by the fact that the daily increases in litter mass as well as in the individual pup body masses, a proxy of mother's lactational performance, were lower at higher ambient temperatures. CONCLUSIONS We suggest that ambient temperatures around the thermoneutral zone and beyond are preventing golden hamster females from producing milk at sufficient rates. Around two thirds of the pups per litter disappeared at high temperature conditions, and their early growth rates were significantly lower than at lower ambient temperatures. It is possible that these losses are due to an intrinsic physiological limitation (imposed by heat dissipation) compromising maternal energy intake and milk production.
Collapse
Affiliation(s)
- Sarah A. Ohrnberger
- Institute of Physiology, Pathophysiology and Biophysics, Veterinary University Vienna, Vienna, Austria
| | - Raquel Monclús
- Ecologie Systématique Evolution, University Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, F-91400 Orsay, France
| | - Heiko G. Rödel
- Laboratoire d’Ethologie Expérimentale et Comparée E.A. 4443, Université Paris 13, Sorbonne Paris Cité, F-93430 Villetaneuse, France
| | - Teresa G. Valencak
- Institute of Physiology, Pathophysiology and Biophysics, Veterinary University Vienna, Vienna, Austria
| |
Collapse
|
40
|
Stawski C, Valencak TG, Ruf T, Sadowska ET, Dheyongera G, Rudolf A, Maiti U, Koteja P. Effect of Selection for High Activity-Related Metabolism on Membrane Phospholipid Fatty Acid Composition in Bank Voles. Physiol Biochem Zool 2015; 88:668-79. [PMID: 26658414 DOI: 10.1086/683039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Endothermy, high basal metabolic rates (BMRs), and high locomotor-related metabolism were important steps in the evolution of mammals. It has been proposed that the composition of membrane phospholipid fatty acids plays an important role in energy metabolism and exercise muscle physiology. In particular, the membrane pacemaker theory of metabolism suggests that an increase in cell membrane fatty acid unsaturation would result in an increase in BMR. We aimed to determine whether membrane phospholipid fatty acid composition of heart, liver, and gastrocnemius muscles differed between lines of bank voles selected for high swim-induced aerobic metabolism-which also evolved an increased BMR-and unselected control lines. Proportions of fatty acids significantly differed among the organs: liver was the least unsaturated, whereas the gastrocnemius muscles were most unsaturated. However, fatty acid proportions of the heart and liver did not differ significantly between selected and control lines. In gastrocnemius muscles, significant differences between selection directions were found: compared to control lines, membranes of selected voles were richer in saturated C18:0 and unsaturated C18:2n-6 and C18:3n-3, whereas the pattern was reversed for saturated C16:0 and unsaturated C20:4n-6. Neither unsaturation index nor other combined indexes of fatty acid proportions differed between lines. Thus, our results do not support the membrane pacemaker hypothesis. However, the differences between selected and control lines in gastrocnemius muscles reflect chain lengths rather than number of double bonds and are probably related to differences in locomotor activity per se rather than to differences in the basal or routine metabolic rate.
Collapse
Affiliation(s)
- Clare Stawski
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland; 2Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Savoyenstrasse 1, 1160 Vienna, Austria
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Rödel HG, Valencak TG, Handrek A, Monclús R. Paying the energetic costs of reproduction: reliance on postpartum foraging and stored reserves. Behav Ecol 2015. [DOI: 10.1093/beheco/arv217] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
42
|
Vaanholt LM, Milne A, Zheng Y, Hambly C, Mitchell SE, Valencak TG, Allison DB, Speakman JR. Oxidative costs of reproduction: Oxidative stress in mice fed standard and low antioxidant diets. Physiol Behav 2015; 154:1-7. [PMID: 26569452 DOI: 10.1016/j.physbeh.2015.11.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 10/29/2015] [Accepted: 11/09/2015] [Indexed: 01/18/2023]
Abstract
Lactation is one of the most energetically expensive behaviours, and trade-offs may exist between the energy devoted to it and somatic maintenance, including protection against oxidative damage. However, conflicting data exist for the effects of reproduction on oxidative stress. In the wild, a positive relationship is often observed, but in laboratory studies oxidative damage is often lower in lactating than in non-breeding animals. We hypothesised that this discrepancy may exist because during lactation food intake increases many-fold resulting in a large increase in the intake of dietary antioxidants which are typically high in laboratory rodent chow where they are added as a preservative. We supplied lactating and non-breeding control mice with either a standard or low antioxidant diet and studied how this affected the activity of endogenous antioxidants (catalase, superoxide dismutase; SOD, and glutathione peroxidise; GPx) and oxidative damage to proteins (protein carbonyls, PC) in liver and brain tissue. The low antioxidant diet did not significantly affect activities of antioxidant enzymes in brain or liver, and generally did not result in increased protein damage, except in livers of control mice on low antioxidant diet. Catalase activity, but not GPx or SOD, was decreased in both control and lactating mice on the low antioxidant diet. Lactating mice had significantly reduced oxidative damage to both liver and brain compared to control mice, independent of the diet they were given. In conclusion, antioxidant content of the diet did not affect oxidative stress in control or reproductive mice, and cannot explain the previously observed reduction in oxidative stress in lactating mammals studied in the laboratory. The reduced oxidative stress in the livers of lactating mice even under low antioxidant diet treatment was consistent with the 'shielding' hypothesis.
Collapse
Affiliation(s)
- L M Vaanholt
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
| | - A Milne
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
| | - Y Zheng
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
| | - C Hambly
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
| | - S E Mitchell
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK
| | - T G Valencak
- University of Veterinary Medicine in Vienna, Department of Integrative Biology and Evolution, Vienna, Austria
| | - D B Allison
- Nutrition Obesity Research Center, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - J R Speakman
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, UK; Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
| |
Collapse
|
43
|
Valencak TG, Gamsjäger L, Ohrnberger S, Culbert NJ, Ruf T. Healthy n-6/n-3 fatty acid composition from five European game meat species remains after cooking. BMC Res Notes 2015; 8:273. [PMID: 26116375 PMCID: PMC4483215 DOI: 10.1186/s13104-015-1254-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 06/19/2015] [Indexed: 11/25/2022] Open
Abstract
Background Intensive farming of livestock along with recent food scandals and consumer deception have increased awareness about risks for human nutrition. In parallel, the demand for meat obtained under more natural conditions from animals that can freely forage has largely increased. Interestingly, the consumption of game meat has not become more common despite its excellent quality and content of polyunsaturated fatty acids (PUFAs). Context and purpose We addressed the question if game meat fatty acid composition is modified through kitchen preparation. By analysing muscle fatty acid (FA) composition (polar and total lipids) of five European game species in a raw and a processed state, we aimed to quantify the proportion of PUFA that are oxidised and hydrogenated during processing. All game meat species originated from local hunters and free-living individuals. To mimic a realistic situation a professional chef prepared the meat samples with gentle use of heat in a standardised way. Results Expectedly, the overall content of polyunsaturated fatty acids declined during the cooking process but the decrease size was <5% and the nutritiously most important n-3/n-6 ratio was not affected by processing (F1,54 = 0.46; p = 0.5). Generally, our samples contained species-specific high PUFA and n-3 FA contents but we point out that differentiating between species is necessary. Conclusion Game meat thus provides a healthy meat source, as cooking does not substantially alter its favourable fatty acid composition. Further research is needed to elucidate species-specific differences and the role of habitat quality and locomotion for tissue composition.
Collapse
Affiliation(s)
- Teresa G Valencak
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
| | - Lisa Gamsjäger
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
| | - Sarah Ohrnberger
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
| | - Nicole J Culbert
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
| | - Thomas Ruf
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
| |
Collapse
|
44
|
Abstract
Omega fatty acids affect various physiological functions, such as locomotion, cardiac function, and thermogenesis. We highlight evidence from animal models that points to pathways by which specific omega fatty acids exert differential effects. We suggest that optimizing the omega fatty acid composition of tissues involves trade-offs between costs and benefits of specific fatty acids.
Collapse
Affiliation(s)
- Walter Arnold
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna, Austria
| | - Sylvain Giroud
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna, Austria
| | - Teresa G. Valencak
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna, Austria
| | - Thomas Ruf
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna, Austria
| |
Collapse
|
45
|
Valencak TG, Azzu V. Making heads or tails of mitochondrial membranes in longevity and aging: a role for comparative studies. Longev Healthspan 2014; 3:3. [PMID: 24588808 PMCID: PMC3996024 DOI: 10.1186/2046-2395-3-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 01/29/2014] [Indexed: 01/02/2023]
Abstract
Mitochondria play vital roles in metabolic energy transduction, intermediate molecule metabolism, metal ion homeostasis, programmed cell death and regulation of the production of reactive oxygen species. As a result of their broad range of functions, mitochondria have been strongly implicated in aging and longevity. Numerous studies show that aging and decreased lifespan are also associated with high reactive oxygen species production by mitochondria, increased mitochondrial DNA and protein damage, and with changes in the fatty acid composition of mitochondrial membranes. It is possible that the extent of fatty acid unsaturation of the mitochondrial membrane determines susceptibility to lipid oxidative damage and downstream protein and genome toxicity, thereby acting as a determinant of aging and lifespan. Reviewing the vast number of comparative studies on mitochondrial membrane composition, metabolism and lifespan reveals some evidence that lipid unsaturation ratios may correlate with lifespan. However, we caution against simply relating these two traits. They may be correlative but have no functional relation. We discuss an important methodology for body mass and phylogenetic correction in comparative studies.
Collapse
Affiliation(s)
- Teresa G Valencak
- Research Institute of Wildlife Ecology, Veterinary University Vienna, Savoyenstrasse 1, 1160 Vienna, Austria.,Institute of Genetics and Developmental Biology, State Key Laboratory of Molecular Developmental Biology, Chinese Academy of Sciences, Beichen Xi Lu, Chaoyang, Beijing, China
| | - Vian Azzu
- Christ's College & Department of Medicine, University of Cambridge, Cambridge CB2 3BU, UK
| |
Collapse
|
46
|
Abstract
Membrane fatty acid (FA) composition is correlated with longevity in mammals. The "membrane pacemaker hypothesis of ageing" proposes that animals which cellular membranes contain high amounts of polyunsaturated FAs (PUFAs) have shorter life spans because their membranes are more susceptible to peroxidation and further oxidative damage. It remains to be shown, however, that long-lived phenotypes such as the Ames dwarf mouse have membranes containing fewer PUFAs and thus being less prone to peroxidation, as would be predicted from the membrane pacemaker hypothesis of ageing. Here, we show that across four different tissues, i.e., muscle, heart, liver and brain as well as in liver mitochondria, Ames dwarf mice possess membrane phospholipids containing between 30 and 60 % PUFAs (depending on the tissue), which is similar to PUFA contents of their normal-sized, short-lived siblings. However, we found that that Ames dwarf mice membrane phospholipids were significantly poorer in n-3 PUFAs. While lack of a difference in PUFA contents is contradicting the membrane pacemaker hypothesis, the lower n-3 PUFAs content in the long-lived mice provides some support for the membrane pacemaker hypothesis of ageing, as n-3 PUFAs comprise those FAs being blamed most for causing oxidative damage. By comparing tissue composition between 1-, 2- and 6-month-old mice in both phenotypes, we found that membranes differed both in quantity of PUFAs and in the prevalence of certain PUFAs. In sum, membrane composition in the Ames dwarf mouse supports the concept that tissue FA composition is related to longevity.
Collapse
Affiliation(s)
- Teresa G Valencak
- Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Savoyenstrasse 1, 1160, Vienna, Austria,
| | | |
Collapse
|
47
|
Valencak TG, Wright P, Weir A, Mitchell SE, Vaanholt LM, Hambly C, Król E, Speakman JR. Limits to sustained energy intake. XXI. Effect of exposing the mother, but not her pups, to a cold environment during lactation in mice. ACTA ACUST UNITED AC 2013; 216:4326-33. [PMID: 23997194 DOI: 10.1242/jeb.092023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The capacity of females to dissipate heat may constrain sustained energy intake during lactation. However, some previous experiments supporting this concept have confounded the impact of temperature on the mothers with the impact on the pups. We aimed to separate these effects in lactating laboratory mice (MF1 strain) by giving the mothers access to cages at two ambient temperatures (10 and 21°C) joined by a tube. Food was available only in the cold cage, but females could also choose go to this cage to cool down while their pups were housed in the warmer cage. Control animals had access to the same configuration of cages but with both maintained at 21°C. We hypothesised that if females were limited by heat dissipation, alleviating the heat load by providing a cool environment would allow them to dissipate more heat, take in more food, generate more milk and hence wean heavier litters. We measured maternal energy budgets and monitored time courses of core body temperature and physical activity. To minimise the variance in energy budgets, all litters were adjusted to 12 (±1) pups. Females in the experimental group had higher energy intake (F1,14=15.8, P=0.0014) and higher assimilated energy (F1,13=10.7, P=0.006), and provided their pups with more milk (F1,13=6.65, P=0.03), consistent with the heat dissipation limit theory. Yet, despite keeping demand constant, mean pup growth rates were similar (F1,13=0.06, P=0.8); thus, our data emphasise the difficulties of inferring milk production indirectly from pup growth.
Collapse
Affiliation(s)
- Teresa G Valencak
- Institute of Genetics and Developmental Biology, State Key Laboratory of Molecular Developmental Biology, Chinese Academy of Sciences, Beichen Xi Lu, Chaoyang, 100101 Beijing, People's Republic of China
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Valencak TG, Hackländer K, Ruf T. Peak energy turnover in lactating European hares: a test of the heat dissipation limitation hypothesis. ACTA ACUST UNITED AC 2010; 213:2832-9. [PMID: 20675553 DOI: 10.1242/jeb.040238] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
It has been suggested that maximum sustained metabolic rate (SusMR) in mammals as reached, for instance, during lactation, is due to a limited capacity for heat dissipation. Here, we experimentally tested whether heat dissipation limitation (HDL) also constrains energy turnover in lactating European hares. Experimentally, we made use of the fact that hares nurse their young only once per day, which allowed us to keep females and young either at the same or at different ambient temperatures. During the last lactation week (week 4) females kept at thermoneutrality (22 degrees C), irrespective of the cold load of their young, had significantly lower rates of metabolisable energy intake (MEI) than cold-exposed mothers (5 degrees C), as predicted by the HDL hypothesis. However, in week 2 of lactation females at thermoneutrality rearing cold-exposed young were able to increase MEI to levels indistinguishable from those of cold-exposed females. Thus, even at thermoneutral temperature females reached maximum rates of energy turnover, which was inconsistent with the HDL hypothesis. We conclude that SusMR in lactating European hares typically results not from physiological constraints but from an active restriction of their energy turnover in order to maximise lifetime reproductive success.
Collapse
Affiliation(s)
- T G Valencak
- Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna, Vienna, Austria.
| | | | | |
Collapse
|
49
|
Valencak TG, Ruf T. Physiological limits to energy turnover: The case of the European hare (Lepus europaeus). Comp Biochem Physiol A Mol Integr Physiol 2009. [DOI: 10.1016/j.cbpa.2009.04.283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
50
|
Abstract
European hares (Lepus europaeus) in central Europe have high energetic costs of reproduction, mainly due to precocial, rapidly growing young that rely largely on energy-rich milk. Thus, hares in this climate build up large fat stores during winter that are then gradually depleted during the spring-to-autumn breeding season. We hypothesized that the diminishing fat stores of females over the breeding season might affect resource allocation, peak energy assimilation during lactation or the total investment in offspring. Therefore, we measured energy intake, milk quality and milk production throughout lactation in spring, summer and autumn in females raising (size-manipulated) litters with three young each, under a natural photoperiod but at buffered ambient temperatures inside our facility. Over the course of the breeding season, the amount of milk production remained constant, but the fat content of the milk decreased. Hence, total energy transfer to young decreased significantly in autumn. By using undecanoic acid as a tracer of body fat mobilization, we were able to show that milk fat partially originated from maternal fat stores, particularly in spring. The peak sustained energy assimilation rates of lactating females were significantly higher in autumn, due to increased rates of food intake. We conclude that fat stores allow female hares to downregulate energy intake and expenditure early in the breeding season, whereas late breeding forces them to reach peak energy intake levels. Accordingly, we suggest that in hares, peak energy turnover during lactation varies with the availability of fat reserves. Limits to the sustained metabolic rate serve as variable constraints on reproductive investment. Thus, there might be a trade-off in energetic costs to mothers rearing early versus late litters in the year.
Collapse
Affiliation(s)
- T G Valencak
- Research Institute of Wildlife Ecology, University of Veterinary Medicine, Savoyenstrasse 1, A-1160 Vienna, Austria.
| | | | | |
Collapse
|