Generation of functional adrenocortical organoids from mice and humans and their preclinical testing as cell-based therapy for adrenal insufficiency

从小鼠和人类中生成功能性肾上腺皮质类器官及其作为肾上腺功能不全细胞疗法的临床前测试

• 批准号: MR/X021017/1
• 负责人: Leonardo Guasti
• 金额: $ 63.95万
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=MR%2FX021017%2F1
• 关键词: Generation; functional; adrenocortical; organoids; mice

The adrenal glands are part of the endocrine system, and their function is to release hormones into the blood system. Each adrenal gland is composed of two distinct parts, an outer cortex and an inner medulla. The adrenal cortex is essential for life as it produces steroid hormones: glucocorticoids (such as cortisol) regulate body metabolism and help us fight infections, and mineralocorticoids (such as aldosterone) mainly affect blood pressure. Adrenal cortex disorders can cause our adrenal glands to produce too much or not enough hormones; adrenal insufficiency occurs when glucocorticoids, and sometimes mineralocorticoids, cannot be generated in sufficient amounts. Adrenal insufficiency can be caused by mutations in genes essential for adrenal function, autoimmune disease, or tuberculosis infection of the glands; more recently, it has also been reported that SARS-CoV-2 (the causative agent for Coronavirus disease COVID-19) can infect the adrenal glands and cause adrenal insufficiency in some patients. Adrenal insufficiency is treated with medication to replace the missing hormones, and patients must take these medications for the rest of their life. These treatments are far from perfect, and the overall management of patients can be very challenging for specialists and patients alike; for example, patients may have sudden severe symptoms, especially when stressed as a result of an illness, fever, surgery, or dehydration and therefore must always carry a medical alert card or tag in order to ensure rapid treatment to prevent shock, seizure, or coma. Scientists are striving to develop novel curative treatments for patients with adrenal insufficiency, and important pre-clinical steps have been achieved in the field of gene- and cell-based therapies. Our laboratory has a long-lasting interest in the biology of the adrenal gland and recently, with a ground-breaking study, we have been able to generate functional adrenal cells starting from cells extracted from urine of patients with inborn adrenal disorders. The overall goal of this project is to establish, for the first time, adrenal organoids: these are mini organs generated in a dish, that retain the physiological function of the tissue they are generated from, and hence, can be considered 'avatars' of the tissue of origin, the adrenal cortex in this case. This project would allow us to fully characterise adrenal organoids in mice and humans, in both sexes and established from young and older donors. Crucially, when function is retained long-term, organoids could potentially be used to replace the patients' non-functioning gland; to test this, we will use an appropriate pre-clinical model, namely mice where a gene has been removed and recapitulating quite accurately the rare genetic disorder Congenital Adrenal Hyperplasia. This model has been generated and characterised by our collaborators at the University of Edinburgh, UK. Here, organoids will be transplanted in the external part of the kidneys, and we will assess whether the cardinal features of the Congenital Adrenal Hyperplasia (deficiency in glucocorticoids and mineralocorticoids) can be reversed. We believe this project will accelerate the translation of promising bench research to the patient over the next 5-10 years.

肾上腺是内分泌系统的一部分，其功能是将激素释放到血液系统中。每个肾上腺都由两个不同的部分组成，外皮质和内髓质。肾上腺皮质对生命至关重要，因为它产生类固醇激素：糖皮质激素（如皮质醇）调节身体代谢并帮助我们对抗感染，盐皮质激素（如醛固酮）主要影响血压。肾上腺皮质功能紊乱会导致肾上腺产生过多或不足的激素;当糖皮质激素，有时盐皮质激素，不能产生足够的量时，就会发生肾上腺功能不全。肾上腺功能不全可由肾上腺功能所必需的基因突变、自身免疫性疾病或腺体结核感染引起;最近，也有报道称SARS-CoV-2（冠状病毒疾病COVID-19的病原体）可感染肾上腺，并导致某些患者肾上腺功能不全。肾上腺功能不全的治疗是用药物来代替缺失的激素，患者必须在余生中服用这些药物。这些治疗方法远非完美，患者的整体管理对于专家和患者来说都是非常具有挑战性的;例如，患者可能会突然出现严重症状，特别是当由于疾病，发烧，手术或脱水而受到压力时，因此必须始终携带医疗警报卡或标签，以确保快速治疗，以防止休克，癫痫发作或昏迷。科学家们正在努力为肾上腺功能不全患者开发新的治疗方法，在基因和细胞治疗领域已经取得了重要的临床前步骤。我们的实验室对肾上腺的生物学有着长期的兴趣，最近，通过一项突破性的研究，我们已经能够从先天性肾上腺疾病患者的尿液中提取细胞，产生功能性肾上腺细胞。该项目的总体目标是首次建立肾上腺类器官：这些是在培养皿中产生的微型器官，保留了它们产生的组织的生理功能，因此可以被认为是起源组织的“化身”，在这种情况下是肾上腺皮质。该项目将使我们能够在小鼠和人类中完全复制肾上腺类器官，无论是男性还是女性，并从年轻和老年供体中建立。至关重要的是，当功能长期保留时，类器官可能被用于替代患者的无功能腺体;为了测试这一点，我们将使用适当的临床前模型，即基因已被移除的小鼠，并准确地重现罕见的遗传疾病先天性肾上腺增生。该模型由我们在英国爱丁堡大学的合作者生成和表征。在这里，类器官将被移植到肾脏的外部，我们将评估先天性肾上腺增生（糖皮质激素和盐皮质激素缺乏）的主要特征是否可以逆转。我们相信，该项目将在未来5-10年内加速将有前途的实验室研究转化为患者。