Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Estrus Cycle, Pyometra, and Insulin-Resistant Diabetes in the Bitch: What is Known and Why it is Relevant?

Version 1 : Received: 16 February 2024 / Approved: 19 February 2024 / Online: 19 February 2024 (08:03:13 CET)

A peer-reviewed article of this Preprint also exists.

Pöppl, Á.G.; Lopes, J.L.X.; Nogueira, T.B.; da Silva, D.I.; Machado, B.S. Progesterone-Related Diabetes Mellitus in the Bitch: Current Knowledge, the Role of Pyometra, and Relevance in Practice. Animals 2024, 14, 890. Pöppl, Á.G.; Lopes, J.L.X.; Nogueira, T.B.; da Silva, D.I.; Machado, B.S. Progesterone-Related Diabetes Mellitus in the Bitch: Current Knowledge, the Role of Pyometra, and Relevance in Practice. Animals 2024, 14, 890.

Abstract

Correlations among estrus cycle, pyometra, and canine diabetes mellitus (CDM) have been described since the late 1950s, and substantial progress in understanding mechanisms beyond was achieved nowadays. Progesterone-related diabetes mellitus (PRDM) in dogs is known for its particular potential for diabetes remission. Thus, a deep understanding of the physiopathological aspects involved is crucial to postulate treatment guidelines to improve the PRDM remission rate, as well as to inform preventive measures. This narrative review aims to provide relevant detailed information on 1) canine estrus cycle and its impact on CDM etiology and management, 2) the role of pyometra as a further cause of insulin resistance, and 3) useful individual therapeutic and preventive strategies. Pharmacological annulment of progesterone effects, as well as inflammatory and progesterone-related conditions resolution in association with adequate exogenous insulin therapy, and residual beta cell function, are key aspects to achieve remission, or at least to improve diabetic clinical control. In this way, spaying should be considered mandatory in most PRDM cases. Preventive measures against CDM can include spaying recommendations; however, individual-based recommendations should be considered since castration may be associated with some long-term health issues.

Keywords

diestrus; progesterone; growth hormone; insulin resistance; insulin receptor; spaying; aglepristone; dog

Subject

Medicine and Pharmacology, Veterinary Medicine

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