Investigations on metabolic diseases of horses in Egypt.
Abstract: Obesity is a significant risk factor that predisposes horses to laminitis, equine metabolic syndrome, arthritis, heart disease, and respiratory issues. Unassigned: Mares showing overweight or laminitis ( = 30), different BCS ( = 90) weighing 350-550 Kg were subjected to clinical and rump fat assessments. Blood samples were collected to measure circulating estradiol, progesterone, cortisol, insulin, insulin-like growth factor-1 (IGF-1), and leptin. Additionally, glucose, cholesterol, triglycerides, total proteins, albumin, nitric oxide (NO), lactate dehydrogenase (LDH), glutathione reduced, catalase, and serum amyloid A were measured. Statistical comparisons among mares were based on laminitis, hyperinsulinemia, overweight, the combination of hyperinsulinemia and overweight, and rump fat levels. Unassigned: Laminitis was associated with lower glucose levels (4.83 ± 0.16 5.56 ± 0.52 mmol/L; 0.002) and body weight (380.0 ± 10.95 447.6 ± 65.98 kg; 0.02), as well as higher albumin (3.78 ± 0.01 3.11 ± 0.62 g/dL; 0.015), catalase (193.64 ± 69.29 37.45 ± 7.57 U/mL; 0.001), IGF-1 (29.35 ± 17.31 20.29 ± 6.48 ng/mL; 0.043), and the glucose/insulin ratio (0.77 ± 0.68 0.44 ± 0.030; 0.05). Obesity (>450 Kg) was associated with increased glucose levels (5.60 ± 0.54 5.15 ± 0.39 nmol/L; 0.018) and reduced IGF-1 (16.44 ± 4.51 28.24 ± 3.90 ng/mL; 0.001), albumin (2.98 ± 0.67 3.46 ± 0.53 g/dL; 0.041), albumin/globulin ratio (0.72 ± 0.07 0.98 ± 0.11; 0.048), and glucose/insulin ratio (0.34 ± 0.14 0.71 ± 0.58; 0.009). Hyperinsulinemia (>20 μU/L) was associated with significant reduction in albumin (2.67 ± 0.59 3.56 ± 0.37 g/dL; 0.0001), albumin/globulin ratio (0.57 ± 0.24 1.01 ± 0.32 g/dL; 0.0001), catalase (17.23 ± 2.24 100.67 ± 30.99 U/mL; 0.021), NO (19.23 ± 2.24 . 21.35 ± 1.29 mmoL/mL; = 0.002), glucose (5.44 ± 0.53 5.61 ± 0.38 mmol/L; 0.038), and glucose/insulin ratio (0.18 ± 0.04 0.72 ± 0.41; 0.0001). In contrast, globulin levels were significantly elevated (5.02 ± 1.02 . 3.85 ± 1.10 g/dL; = 0.0001). The combination of hyperinsulinemia and obesity was associated with significant decreases in ( 0.0001) albumin, albumin/globulin, and IGF-1, and increases in LDH, NO, globulins ( 0.006). Additionally, NO levels were significantly reduced in hyperinsulinemia mares with lower body weight ( 0.0001). Unassigned: Obesity, whether assessed by rump fat or overweight, is not always associated with hyperinsulinemia or with metabolic or endocrinologic abnormalities in mares. Conversely, hyperinsulinemia is not always associated with obesity but is related to insulin resistance and dysregulation.
Copyright © 2025 Aboelmaaty, Ahdy, El-khodery and Elgioushy.
Publication Date: 2025-08-18 PubMed ID: 40901060PubMed Central: PMC12400681DOI: 10.3389/fvets.2025.1591090Google Scholar: Lookup
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APA
Aboelmaaty AM, Ahdy AM, El-Khodery S, Elgioushy M.
(2025).
Investigations on metabolic diseases of horses in Egypt.
Front Vet Sci, 12, 1591090.
https://doi.org/10.3389/fvets.2025.1591090 Publication
Researcher Affiliations
- Animal Reproduction and AI Department, Veterinary Research Institute, National Research Centre, Cairo, Egypt.
- Department of Parasitology and Animal Diseases, Veterinary Research Institute, National Research Centre, Giza, Egypt.
- Department of Medicine and Infectious Medicine, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
- Department of Animal Medicine, Faculty of Veterinary Medicine, Aswan University, Aswan, Egypt.
Conflict of Interest Statement
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.
References
This article includes 47 references
- Dosi M, Scott L, Payne H, Poldy J, Keen J, McGorum B. Markers of hepatic insulin clearance and their association with steatosis in hyperinsulinaemic horses. J Vet Intern Med (2025) 39:e70143.
- Shepherd ML, Pleasant RS, Crisman MV, Were SR, Milton SC, Swecker WS. Effects of high and moderate non-structural carbohydrate hay on insulin, glucose, triglyceride, and leptin concentrations in overweight Arabian geldings. J Animal Physiol Animal Nut (2012) 96:428–35.
- Henneke DR, Potter GD, Kreider JL, Yeates BF. Relationship between condition score physical measurement and body fat percentage in mares. Equine Vet J (1983) 15:371–2.
- Martin-Gimenez T, Aguirre-Pascasio CN, de Blas I. Beyond scoring systems: usefulness of morphometry considering demographic variables, to evaluate neck and overall obesity in Andalusian horses. Animal (2018) 12:597–605.
- Martin-Gimenez T, de Blas I, Aguilera-Tejero E, Diez de Castro E, Aguirre-Pascasio CN. Endocrine, morphometric, and ultrasonographic characterization of neck adiposity in Andalusian horses. Domest Anim Endocrinol (2016) 56:57–62.
- Abo El-Maaty AM, Shafey HI, Daneva T, Hozyen HF, El-Debaky H, Alam S. Relation of leptin gene polymorphism to the circulating leptin, insulin, estradiol, and progesterone hormones in mares with high rump fat. J Adv Vet Res (2020) 10:105–10.
- Abo El-Maaty AM, Mohamed AH, Abu-Aita NA, Morgan HM. Markers for predicting overweight or obesity of broodmares. J Equine Vet Sci (2017) 56:9–18.
- Silva SR, Payan-Carreira R, Quaresma M, Guedes CM, Santos AS. Relationships between body condition score and ultrasound skin-associated subcutaneous fat depth in equids. Acta Vet Scandinavia 20 (2016) 58:62.
- Brooks SA, Makvandi-Nejad S, Chu E, Allen JJ, Streeter C, Guedes CM. Morphological variation in the horse: defining complex traits of body size and shape. Anim Genet (2010) 41:159–65.
- Catalano DN, Coleman RJ, Hathaway MR, McCue ME, Rendahl AK, Martinson KL. Estimation of actual and ideal bodyweight using morphometric measurements and owner owner-guessed bodyweight of adult draft and warmblood horses. J Equine Vet Sci (2016) 39:38–43.
- Van Weyenberg S, Buyse J, Kalmar ID, Swennen Q, Janssens GP. Voluntary feed intake and leptin sensitivity in ad libitum fed obese ponies following a period of restricted feeding: a pilot study. J Animal Physiol Animal Nut (2013) 97:624–31.
- Caltabilota TJ, Earl LR, Thompson DL, Clavier SE, Mitcham PB. Hyperleptinemia in mares and geldings: assessment of insulin sensitivity from glucose responses to insulin injection. J Animal Sci (2010) 88:2940–9.
- Ader M, Stefanovski D, Kim SP, Richey JM, Ionut V, Catalano KJ. Hepatic insulin clearance is the primary determinant of insulin sensitivity in the normal dog. Obesity (Silver Spring) (2014) 22:1238–45.
- Clemente-Suárez VJ, Redondo-Flórez L, Beltrán-Velasco AI, Martín-Rodríguez A, Martínez-Guardado I, Navarro-Jiménez E. The role of adipokines in health and disease. Biomedicine (2023) 2023:1290.
- Frühbeck G, Catalán V, Rodríguez A, Gómez-Ambrosi J. Adiponectin-leptin ratio: a promising index to estimate adipose tissue dysfunction. Relation with obesity-associated cardiometabolic risk. Adipocyte (2018) 7:57–62.
- Yanai H, Yoshida H. Beneficial effects of adiponectin on glucose and lipid metabolism and atherosclerotic progression: mechanisms and perspectives. Int J Mol Sci. (2019) 20:1190. doi: 10.3390/ijms20051190, PMID:
- Zak A, Siwinska N, Elzinga S, Barker V, Stefaniak T, Schanbacher B, et al. Effects of equine metabolic syndrome on inflammation and acute-phase markers in horses. Domest Anim Endocrinol. (2020) 72:106448. doi: 10.1016/j.domaniend.2020.106448
- Durham AE, Frank N, McGowan CM, Menzies-Gow NJ, Roelfsema E, Vervuert I, et al. ECEIM consensus statement on equine metabolic syndrome. J Vet Intern Med. (2019) 33:335–49. doi: 10.1111/jvim.15423, PMID:
- Hallman I, Karikoski N, Kareskoski M. The effects of obesity and insulin dysregulation on mare reproduction, pregnancy, and foal health: a review. Front Vet Sci. (2023) 10:1180622. doi: 10.3389/fvets.2023.1180622, PMID:
- Carter RA, Treiber KH, Geor RJ, Douglass L, Harris PA. Prediction of incipient pasture associated laminitis from hyperinsulinemia, hyperleptinemia and generalized and localized obesity in a cohort of ponies. Equine Vet J. (2009) 41:171–8. doi: 10.2746/042516408X342975, PMID:
- Morgan RA, McGowan TW, McGowan CM. 2014. Prevalence and risk factors for hyperinsulinemia in ponies in Queensland, Australia. Aust Vet J. (2014) 92:101–6. doi: 10.1111/avj.12159, PMID:
- Sundra T, Rossi G, Rendle D, Lester GA. A practical approach to hyperinsulinaemia in horses with equine metabolic syndrome. Equine Vet Educ. (2024), 36:325–36. doi: 10.1111/eve.13938
- Kellon EM, Gustafson KM. 2020. Possible dysmetabolic hyperferritinemia in hyperinsulinemic horses. Open Vet J. (2020) 9:287–93. doi: 10.4314/ovj.v9i4.2, PMID:
- de Laat MA, McGowan CM, Sillence MN, Pollitt CC. Hyperinsulinemic laminitis. Vet Clinic North America Equine Prac. (2010) 26:257–64. doi: 10.1016/j.cveq.2010.04.003
- Patterson-Kane JC, Karikoski NP, McGowan CM. Paradigm shifts in understanding equine laminitis. Vet J. (2018) 231:33–40. doi: 10.1016/j.tvjl.2017.11.011, PMID:
- Al-Ansari AS, Golding E, Walshe N, Mooney CT, Duggan V. Obesity and obesity-associated metabolic disease conditions in Connemara ponies in Ireland. Equine Vet J. (2023) 56:273–280. doi: 10.1111/evj.14029
- Suagee JK, Corl BA, Crisman MV, Pleasant RS, Thatcher CD, Geor RJ. Relationships between body condition score and plasma inflammatory cytokines, insulin, and lipids in a mixed population of light-breed horses. J Vet Int Med. (2013) 27:157–63. doi: 10.1111/jvim.12021, PMID:
- Vick MM, Adams AA, Murphy BA, Sessions DR, Horohov DW, Cook RF, et al. Relationships among inflammatory cytokines, obesity, and insulin sensitivity in the horse. J Anim Sci. (2007) 85:1144–55. doi: 10.2527/jas.2006-673, PMID:
- Pleasant RS, Suagee JK, Thatcher CD, Elvinger F, Geor RJ. Adiposity, plasma insulin, leptin, lipids, and oxidative stress in mature light breed horses. J Vet Intern Med. (2013) 27:576–82. doi: 10.1111/jvim.12056, PMID:
- EEG . (2022) Equine Endocrinology Group: Recommendations for the Diagnosis and Management of Equine Metabolic Syndrome (EMS). Available online at:https://sites.tufts.edu/equineendogroup/. Accessed 2 January 2023
- Kohnke J. (1992). Feeding and nutrition: The making of a champion. Pymble, Australia: Birubi Pacific. 163–166.
- Westervelt RG, Stouffer JR, Hintz HF, Schryver HF. Estimating fatness in horses and ponies. J Anim Sci. (1976) 43:781–5.
- Carroll CL, Huntington PJ. Body condition scoring and weight estimation of horses. Equine Vet J. (1988) 20:41–5. doi: 10.1111/j.2042-3306.1988.tb01451.x
- Megerssa YC, Gari FR, Woldemariyam FT. Applicability of commercial clinical chemistry test kits for horse serum. BMC Res Notes. (2021) 14:13. doi: 10.1186/s13104-020-05434-2, PMID:
- Potter SJ, Bamford NJ, Harris PA, Bailey SR. Prevalence of obesity and owners' perceptions of body condition in pleasure horses and ponies in South-Eastern Australia. Australia Vet J. (2016) 94:427–32. doi: 10.1111/avj.12506
- Valle E, Storace D, Sanguineti R, Carter R, Odetti P, Geor R, et al. Association of the glycoxidative stress marker pentosidine with equine laminitis. Vet J. (2013) 196:445–50. doi: 10.1016/j.tvjl.2012.10.030, PMID:
- Sessions-Bresnahan DR, Carnevale EM. The effect of equine metabolic syndrome on the ovarian follicular environment. J Animal Sci. (2014) 92:1485–94. doi: 10.2527/jas.2013-7275, PMID:
- Bamford NJ, Potter SJ, Harris PA, Bailey SR. Effect of increased adiposity on insulin sensitivity and adipokine concentrations in horses and ponies fed a high fat diet, with or without a once daily high glycaemic meal. Equine Vet J. (2016) 2016:368–73. doi: 10.1016/j.tvjl.2016.02.002
- Buff PR, Dodds AC, Morrison CD, Whitley NC, McFadin EL, Daniel JA, et al. Leptin in horses: tissue localization and relationship between peripheral concentrations of leptin and body condition. J Anim Sci. (2002) 80:2942–8. doi: 10.2527/2002.80112942x, PMID:
- Frank N, Elliott SB, Brandt LE, Keisler DH. Physical characteristics, blood hormone concentrations, and plasma lipid concentrations in obese horses with insulin resistance. J American Vet Med Assoc. (2006) 228:1383–90. doi: 10.2460/javma.228.9.1383
- Ungru J, Blüher M, Coenen M, Raila J, Boston R, Vervuert I. Effects of body weight reduction on blood adipokines and subcutaneous adipose tissue adipokine mRNA expression profiles in obese ponies. Vet Rec. (2012) 171:528. doi: 10.1136/vr.100911, PMID:
- Kearns CF, McKeever KH, Roegner V, Brady SM, Malinowski K. Adiponectin and leptin are related to fat mass in horses. Vet J. (2006) 172:460–5. doi: 10.1016/j.tvjl.2005.05.002, PMID:
- Alinezhad A, Jafari F. The relationship between components of metabolic syndrome and plasma level of sex hormone-binding globulin. Euro J Translational Myology. (2019) 29:8196. doi: 10.4081/ejtm.2019.8196, PMID:
- Simó R, Sáez-López C, Barbosa-Desongles A, Hernández C, Selva DM. Novel insights in SHBG regulation and clinical implications. Trends Endocrinol Metab. (2015) 26:376–83. doi: 10.1016/j.tem.2015.05.001, PMID:
- Wang Y. Definition, prevalence, and risk factors of low sex hormone-binding globulin in US adults. J Clin Endocrinol Metab. (2021) 106:e3946–56. doi: 10.1210/clinem/dgab416, PMID:
- Bourebaba L, Kępska M, Qasem B, Zyzak M, Łyczko J, Klemens M, et al. Sex hormone-binding globulin improves lipid metabolism and reduces inflammation in subcutaneous adipose tissue of metabolic syndrome-affected horses. Front Molecular Biosci. (2023) 10:1214961. doi: 10.3389/fmolb.2023.1214961, PMID:
- Sessions-Bresnahan DR, Heuberger AL, Carnevale EM. Obesity in mares promotes uterine inflammation and alters embryo lipid fingerprints and homeostasis. Biol Reprod. (2018) 99:761–72. doi: 10.1093/biolre/ioy107, PMID:
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