膜性病向抗原在健康脏中表现出细胞特异性和非特异性表达
Ying Dong1,2,3, Hui Xu4, Damu Tang1,2,3
1Department of Surgery, McMaster University, Hamilton, ON L8S 1C7, Canada.
Genes
|March 28, 2025
概括
大多数膜性病向抗原都存在于细胞中,PLA2R1是成人病的关键标志物. SEMA3B被确定为一个潜在的儿童MNTAg.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 对 podocyte 抗原的自身免疫是膜性病 (MN) 的主要原因.
- 已经确定了众多的MN抗原 (MNTAgs),但它们在细胞中的表达在很大程度上仍未被描述.
- 了解MNTAgs的受细胞表达对于诊断和治疗MN至关重要.
研究的目的:
- 为了研究已知MNTAgs在成年,胎儿和小鼠细胞中的表达模式.
- 为了确定与不同年龄组和物种相关的潜在的MNTAg.
- 为了将MNTAg表达与细胞损伤和疾病状态相关联.
主要方法:
- 利用了来自成年,胎儿和小鼠脏的CZ CELLxGene单细胞RNA测序数据集.
- 分析了包括PLA2R1,THSD7A等在内的MNTAg综合清单的表达.
- 检查了染色质可访问性数据,以推断MNTAg表达的转录调节.
主要成果:
- 大多数MNTAg都表达在成年受体细胞中,PLA2R1表现出显著更高的丰富度,并作为主要的受体细胞标记物.
- 在与蛋白尿相关的各种脏疾病中,PLA2R1在细胞中升高调节.
- SEMA3B在胎儿细胞中高度表达,表明其作为儿童MNTAg的作用,而Thsd7a在小鼠细胞中突出.
结论:
- 大多数MNTAgs在成年期和发育期间都表达在细胞中.
- PLA2R1是成年人中关键的 podocyte 标记物,其高表达与脏疾病和蛋白尿有关.
- 像SEMA3B和Thsd7a这样的特定MNTAg在胎儿和小鼠脏中显示出不同的表达模式,分别突出了物种和发育特异性的作用.
相关概念视频
01:10Nephrons
The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma happens...
01:20Renal Corpuscle
The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
01:24Nephrotic Syndrome I : Introduction
Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of fluid...
01:26Nephrotic Syndrome II : Assessment and Medical Management
IntroductionNephrotic syndrome is a kidney disorder marked by excessive protein loss in the urine, leading to various systemic complications. This condition often results from damage to the glomeruli—the kidney's filtering units—causing proteinuria, low blood protein levels, and fluid retention. Understanding the assessment, diagnosis, and management of nephrotic syndrome is essential for effective treatment and prevention of further kidney damage.AssessmentPatient History: Document any history...
01:29Acute Kidney Injury II: Pathophysiology
Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
01:28Diabetic Nephropathy
Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...