HEИндивидуална стипендия2024–2027

PnocMDDSex · Sex differences in BNST prepronociceptin-expressing neurons in modulating chronic stress-induced depressive-like behaviour in mice

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период
2024-09-01 → 2027-03-31
Финансиране от ЕС
244 606 €
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3
Схема
HORIZON-TMA-MSCA-PF-GF

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Накратко на български

Неврони в определена зона на мозъка при мишки се анализират, за да се види как влияят на депресивното поведение при хроничен стрес. Това помага да се разбере защо жените страдат от депресия по-често и защо лечението при тях е по-трудно.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Sex differences in BNST prepronociceptin-expressing neurons in modulating chronic stress-induced depressive-like behaviour in mice

Major Depressive Disorder, commonly known as depression, is a widespread mental health condition that affects millions of people worldwide. It's more than just feeling sad; depression can impact every aspect of a person's life, from their mood and interests to their ability to think clearly and even their basic bodily functions like sleep and appetite. Imagine waking up every day feeling exhausted, struggling to find joy in activities you once loved, and battling persistent negative thoughts. This is the reality for many people living with depression. Depression affects people of all ages, backgrounds, and walks of life. However, it's important to note that women are twice as likely to experience depression compared to men. This gender difference isn't just a matter of numbers; women also tend to face greater challenges in treatment, often experiencing less effective results and more frequent relapses. These disparities highlight the need for a deeper understanding of how depression affects different people in different ways. Approximately 6% of the world's population struggles with this condition, with even higher rates in Europe and America, where it affects up to 10% of people. Depression is a leading cause of disability worldwide, affecting families, communities, and economies on a massive scale. Despite the widespread nature of depression, getting help remains a significant challenge for many. In wealthy countries, only about half to two-thirds of people with depression receive treatment. The situation is even more dire in less affluent regions, where less than one in ten people with depression get the help they need. Even when people do receive treatment, whether through therapy, medication, or a combination of both, it's not always effective. Current treatments work well for less than 70% of patients, and over 30% of those treated find that their depression resists these conventional approaches. These sobering statistics underscore the urgent need for better understanding and more effective treatments for depression, and that's where cutting-edge research comes in. Scientists are working tirelessly to unravel the complex web of factors that contribute to depression, with a particular focus on understanding why it affects men and women differently. This research isn't just about satisfying scientific curiosity; it's about finding real-world solutions that can improve lives. One exciting area of study involves using animal models to mimic the characteristics of depression. While it might seem strange to think about depressed mice or rats, these models allow researchers to study the disorder in ways that wouldn't be possible or ethical with human subjects. By observing how chronic stress affects these animals' behavior and brain chemistry, scientists can gain insights that may translate to better treatments for humans. Researchers are also delving into the role of sex hormones, like estrogen, in how our bodies and brains respond to stress. This line of inquiry could help explain why women are more vulnerable to depression and why they might respond differently to treatments. It's not just about hormones, though. Scientists are examining specific groups of brain cells and how they function differently in males and females under stress. This detailed understanding of brain circuitry could lead to more targeted and effective treatments. The ultimate goal of this research is to develop personalized approaches to treating depression. Imagine a future where doctors can tailor treatments to each individual based on their sex, hormone levels, and unique brain chemistry. This could dramatically improve the effectiveness of treatments and reduce the frequency of relapses, particularly for women who currently face greater challenges in managing their depression. While this research focuses heavily on biological factors, it's crucial to remember that depression is a complex disorder influenced by a mix of biological, psychological, and social factors. Our life experiences, relationships, and cultural background all play a role in how we experience and cope with depression. By considering all these elements together, researchers hope to paint a more complete picture of depression and how to treat it effectively. The potential impact of this research extends far beyond the laboratory. By improving our understanding of depression and developing more effective treatments, we could alleviate suffering for millions of people worldwide. Better treatment could mean fewer missed workdays, stronger relationships, and an overall improvement in quality of life for those affected by depression. It could also reduce the economic burden of the disorder, freeing up resources for other important health initiatives. As this research progresses, it's important for all of us to stay informed and engaged. Depression affects our friends, family members, colleagues, and communities. By understanding more about this condition and the ongoing efforts to combat it, we can all play a role in supporting those who struggle with depression and advocating for continued research and improved access to treatment. While depression remains a significant global health challenge, through innovative research and a commitment to understanding the complexities of this disorder, scientists are paving the way for a future where depression can be more effectively prevented, diagnosed, and treated. This journey toward better mental health is one that affects us all, reminding us of the importance of compassion, support, and continued scientific inquiry in the face of one of humanity's most important health challenges.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Major Depressive Disorder (MDD) is a highly prevalent and disabling condition experienced by ~6% of the population worldwide. Interestingly, women are twice as likely as men to suffer from MDD, and the specific mechanisms contributing to such difference are only starting to be elucidated. Chronic mild stress has been shown to reproduce in rodents some of the main traits of MDD, such as anhedonia or anxiety-like behaviour. Chronic stress has been shown to interfere with prepronociceptin (Pnoc) expression in the anterior BNST (amBNST) in rodents. Interestingly, it has been established a functional antagonistic role of Pnoc neurons over corticotropin-releasing hormone (CRH)-expressing neurons, which mediate the stress response in mammals. Moreover, amBNSTPnoc neurons have been shown to support rapid arousal responses toward motivationally salient stimuli in mice. Preliminary data has demonstrated sex differences in amBNSTPnoc distribution across compartments, indicating possible sex-dependent effects of stress on amBNSTPnoc function. We aim to explore sex differences in amBNSTPnoc neurons in rapid arousal responses upon sucrose presentation and its relationship with chronic stress-driven anhedonia. To that end, rapid arousal responses in male and female mice will be studied after chronic stress in mice, and related to anhedonic-like behaviour, and Pnoc and CRH expression in compartments of the BNST. To further understand the effects of chronic stress in Pnoc neurons, calcium transients using 2-photon calcium imaging in amBNSTPnoc neurons will be studied before and after chronic stress. Chemogenetic activation of amBNSTPnoc after stress will be used to functionally test that low Pnoc expression drives hypoarousal states related to anhedonic behavior. The proposal aims to elucidate sex differences in the pathophysiology of chronic stress-driven depressive-like behaviour and provide new perspectives and ideas on the higher prevalence and treatment resistance in females.

Оригинален текст от CORDIS (на английски).

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Данни: CORDIS, © Европейски съюз