Sex-specific role of the optic gland in octopus maya: A transcriptomic analysis

Ventura-López, Claudia; López‐Galindo, Laura; Rosas, Carlos; Sánchez‐Castrejón, Edna; Galindo-Torres, Pavel; Pascual, Cristina; Rodrı́guez-Fuentes, Gabriela; Juárez, Óscar E.; Galindo-Sánchez, Clara E.

doi:10.1016/j.ygcen.2022.114000

Cited by 9 publications

(5 citation statements)

References 97 publications

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“…In such cases, thermally stressed females spawn, even when embryos are at thermal risk. However, the results obtained in the laboratory have demonstrated that in temperatures higher than 27°C, the octopus spawn is inhibited, suggesting that other more complex processes regulate O. maya reproduction during thermal stress ( Di Cosmo and Polese, 2014 ; Domínguez-Estrada et al, 2022 ; Juárez et al, 2015 , 2019 ; Ventura-López et al, 2022 ). Considering the previous results, a second question arises: Could the strength of the oxygen flow pumped from the systemic heart be the signal to the brain that triggers the complex regulatory mechanisms directed to preserve the embryos’ integrity, inhibiting spawning at high temperatures?…”

Section: Discussionmentioning

confidence: 99%

“…The results obtained in the present study show that at 26°C cardiac mitochondria of this acclimation group (26°C) have the highest State 3 respiration, indicating that this temperature is where the cardiac activity is the highest (maximum activity of the proton transport chain and ATP production) and consequently for the transport of oxygen to the rest of tissues, including the reproductive ones. Juárez et al (2015 , 2022 ), Domínguez-Estrada et al (2022) , and Ventura-López et al (2022) studied gene expression in O. maya females exposed to different temperatures. These authors found that in the interval from 24 to 26°C many genes are involved in biochemical processes that ensure the sperm maintenance and egg fertilization success, upregulating in O. maya brain and oviductal gland, probably due to high oxygen availability.…”

Section: Discussionmentioning

confidence: 99%

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Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Meza-Buendia,

Aparicio-Trejo,

Díaz

et al. 2024

Biology Open

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There is evidence that indicates that temperature modulates the reproduction of the tropical species Octopus maya, through the over- or under-expression of many genes in the brain. If the oxygen supply to the brain depends on the circulatory system, how temperature affects different tissues will begin in the heart, responsible for pumping the oxygen to tissues. The present study examines the impact of heat stress on the mitochondrial function of the systemic heart of adult O. maya. The mitochondrial metabolism and antioxidant defense system were measured in the systemic heart tissue of female organisms acclimated to different temperatures (24, 26, and 30°C). The results show that acclimation temperature affects respiratory State 3 and State 4o (oligomycin-induced) with higher values observed in females acclimated at 26°C. The antioxidant defense system is also affected by acclimation temperature with significant differences observed in superoxide dismutase, glutathione S-transferase activities, and glutathione levels. The results suggest that high temperatures (30°C) could exert physical limitations on the circulatory system through the heart pumping, affecting nutrient and oxygen transport to other tissues, including the brain, which exerts control over the reproductive system. The role of the cardiovascular system in supporting aerobic metabolism in octopus females is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Meza-Buendia,

Aparicio-Trejo,

Díaz

et al. 2024

Biology Open

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“…In a study conducted on O. mimus embryos, Olivares et al (2019) hypothesized that negative parental influence on offspring is related to ROS transferred from females to oocytes during oogenesis, causing an ulterior overload for embryos. In this regard, during spawning, female optic glands (located in the brain) focus on maintaining balance between energy and ROS production (Ventura et al, 2022), but high temperatures drastically affect this process (Domínguez et al, 2022). Moreover, at high temperatures, the optic gland in females up-regulates the expression of genes related to stress response and production of stress molecules like corticosterone (Dominguez-Estrada et al, 2022), which may alter embryonic development (Hayward and Wingfield, 2004;Vagnerová et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…During the reproductive phase, females use their energy reserves for parental care (Lin et al, 2019; Roumbedakis et al, 2017; Ventura-López et al, 2022). Biological processes like oxidation-reduction process, respiratory electron transport chain and precursor metabolite and energy generation are conspicuous during spawning in this octopus species (Ventura-López et al, 2022; Meza-Buendia et al, 2021). However, thermally stressed females showed a lower metabolic scope than females maintained in thermally optimal conditions.…”

Section: Introductionmentioning

confidence: 99%

Trans-generational physiological condition of embryos is conditioned by maternal thermal stress inOctopus maya

Domínguez-Castanedo

Palomino-Cruz

Mascaró

et al. 2022

Preprint

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Current anthropogenic global warming generates profound metabolic alterations in marine ectotherm invertebrates capable of leading a wide range of these species to extinction. The most worrying and devastating consequence may be that the effect of thermal stress overpasses the individual generations. To evaluate the transgenerational effect of thermal stress on the cephalopod Octopus maya, this study experimentally tests morphology, respiratory metabolism, antioxidant mechanisms, and oxidative stress indicators of the embryos incubated at two temperatures (24 and 30°C) produced by females acclimated at 24 and 30°C. The results demonstrate that, regardless of their incubation temperature, embryos from females acclimated at 30°C are smaller, show more accelerated development, and higher respiratory rates than those from females acclimated at 24°C. These embryos confirmed a greater oxidative stress degree, as well as an increased amount of soluble carbonylated proteins and catalase activity as the main enzyme during the activation development stage (even the highest in the embryos incubated at 30°C). Finally, a collapse of the antioxidant defense system was observed, measured as lower both CAT activity and GSH concentrations. Additionally, soluble carbonylated proteins reduced and GST activity increased in embryos incubated at 30°C from females maintained at high temperatures in a clear deleterious and transgenerational effect of thermal stress on this octopus species.

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“…An example of the latter is the case of O. Maya, a species of octopus endemic to the Yucatan Peninsula, Mexico, whose maintenance conditions, from the egg stage to the adult stage, have been widely described [14][15][16]. This allows O. Maya, along with other species such as O. insularis [17], O. minor [18] and O. Vulgaris [19] to be considered laboratory animals for physiological, behavioral, and evolutionary studies [20]. As part of these studies, it is crucial to know as much as possible about general anatomy and, particularly in the case of neurobiology, the anatomy of the nervous system.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the brain of the Red Mayan octopus (Octopus Maya)

Ovalle

Navarrete

Castillo

2022

Preprint

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Octopuses show a wide behavioral range that allows them great adaptability to their environment this has permitted them to be the target of great interest for biophysics, cytology, and neurobiology studies. To adequately execute these investigations, it is essential to have a thorough understanding of the neuroanatomy of species that function as good laboratory models, for example, O. Maya. In this work, we undertake the task of extracting and characterizing the various structures of the nervous system of O. Maya at the level of lobes and connectivity between them. Serial sections at 70–80µm for sagittal and coronal plains from the brains of adult and young individuals were stained using Nissl, Hematoxylin, and Eosin (H&E) to visualize the perikarya. We determined the morphology of 30 lobes in the brain of O. Maya from young and adult specimens and the cells that constitute the connectivity pathways between these regions. We also observed that the brains of O. Maya at four weeks after hatching do not show a fully mature brain, but rather that some lobes related to somatosensory memory have low cell density and a simple morphology than that of adult specimens. It is indicative of a maturation process that should be considered for future experimental designs. We hope that this nervous system mapping will increase the basis for more detailed investigations into the neurophysiology of O. Maya and other octopuses.

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Sex-specific role of the optic gland in octopus maya: A transcriptomic analysis

Cited by 9 publications

References 97 publications

Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Climate change consequences on the systemic heart of female Octopus maya: oxidative phosphorylation assessment and the antioxidant system

Trans-generational physiological condition of embryos is conditioned by maternal thermal stress inOctopus maya

Characterization of the brain of the Red Mayan octopus (Octopus Maya)

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