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Articles by Anusha Karthik
Page 9 of 12
Major Histocompatibility Complex and MHC Molecules
Introduction The Major Histocompatibility Complex (MHC) is a group of genes located on chromosome 6 in humans that encode for MHC molecules. These molecules are essential for the immune system to identify and respond to foreign invaders such as viruses, bacteria, and other pathogens. The MHC plays a crucial role in determining the compatibility of transplants and is also implicated in a wide range of diseases, including autoimmune disorders and cancer. Below we shall explore the MHC in detail, discussing its structure, function, and importance in immunology. Structure of MHC Molecules The MHC is divided into two classes: ...
Read MoreLife Cycle of Dendritic Cells: Types and Disease
Introduction Dendritic cells (DCs) are a type of immune cell that play a critical role in the immune system. They are responsible for identifying, capturing, processing, and presenting antigens to T cells. DCs are found in most tissues of the body, including lymphoid and non-lymphoid tissues, and are critical for the initiation and regulation of immune responses. This tutorial will explore the life cycle of dendritic cells, their different types, and their role in various diseases. Dendritic Cell Presenting Antigen to T-Cell Life Cycle of Dendritic Cells Dendritic cells are derived from hematopoietic stem cells in the bone marrow. ...
Read MoreFollicular B Helper T Cells and Their Function
Introduction Within the T cell population, a specific subset known as follicular B helper T cells (Tfh cells) play a crucial role in the formation and function of germinal centers, which are critical for the development of high-affinity antibodies. The immune system plays a critical role in protecting the body from infectious agents and other harmful pathogens. T cells are an essential component of the immune system and are involved in a wide range of functions, including recognizing, and responding to foreign antigens. Overview of Tfh cells Follicular B helper T cells (Tfh cells) are a specialized subset of ...
Read MoreClonal Deletion: Complete vs Incomplete Deletion
Introduction Clonal deletion is a critical process in the development and regulation of the immune system. It is the process by which the body's immune system eliminates self-reactive lymphocytes, which can potentially cause autoimmune diseases. Clonal deletion is a complex process, and there are two types of clonal deletion: complete and incomplete deletion. In this tutorial, we will discuss the differences between complete and incomplete deletion, their mechanisms, and their importance in the immune system. Complete Clonal Deletion Complete clonal deletion, also known as negative selection, is the process by which self-reactive lymphocytes are eliminated from the immune system. ...
Read MoreBursa of Fabricius: Site of Hematopoiesis in Birds
Introduction The Bursa of Fabricius, also known as the Bursa cloacae or simply the Bursa, is a unique organ found only in birds. It is located in the cloaca, which is the common opening for the digestive, urinary, and reproductive systems in birds. The Bursa is an important site of hematopoiesis in birds, meaning that it is responsible for the production of blood cells. The Bursa was first described by the Italian anatomist Hieronymus Fabricius ab Aquapendente in the late 16th century. Fabricius was studying the anatomy of chickens when he discovered this small, pear-shaped organ in the wall of ...
Read MoreAntigen Presentation: A Vital Immune Process
Introduction The human immune system is an incredibly complex and powerful mechanism, capable of detecting and defending against a vast array of potential threats. At the heart of this system are specialized cells called T cells and B cells, which are capable of recognizing specific foreign molecules known as antigens. Antigen presentation is a crucial process that allows these immune cells to recognize and respond to antigens. This article will explore the mechanisms of antigen presentation and its importance in the immune system's function. What is Antigen Presentation? Antigen presentation is the process by which specialized immune cells present ...
Read MoreAccessory Cell or Antigen Presenting Cell (APC)
Introduction Antigen presenting cells (APCs) are a crucial part of the immune system. They play a crucial role in initiating and regulating immune responses by presenting foreign antigens to immune cells. Accessory cells, also known as antigen-presenting cells, are a subset of immune cells that play an essential role in the immune response. Below we shall discuss in detail the accessory cell or antigen-presenting cell (APC). Dendritic Cell Presenting Antigen to T-helper Cell Overview of Accessory Cells Accessory cells or antigen-presenting cells (APCs) are a group of immune cells that are responsible for presenting antigens to T-cells. They play ...
Read MoreNutrient Media and Its Preparation
Introduction Nutrient media is a type of growth medium that is commonly used in microbiology to culture and grow various microorganisms. It is a complex mixture of nutrients that are necessary for the growth of microorganisms such as bacteria, yeast, and fungi. It can be made using a variety of different ingredients, each of which serves a specific purpose in promoting the growth of microorganisms. Discussed below are different types of nutrient media and their preparation. Types of Nutrient Media There are many different types of nutrient media that are used in microbiology, each of which is designed to ...
Read MoreWhat Is the Purpose of Polyacrylamide Gel Electrophoresis (PAGE)?
An Overview Polyacrylamide gel electrophoresis, or PAGE, is a powerful tool used by scientists to separate and analyse proteins, DNA, and RNA. This technique is widely used in various fields, including biochemistry, molecular biology, genetics, and proteomics, to study the properties of macromolecules and their interactions. Polyacrylamide Gel Electrophoresis with 15-Lane Blue Loading Buffer Given below is the purpose of polyacrylamide gel electrophoresis, its history, and how it works. We will also elucidate the different types of PAGE and their applications, as well as the advantages and limitations of this technique. History of Polyacrylamide Gel Electrophoresis The development of ...
Read MoreWhat Is Synthetic Seed Technology?
What is Synthetic Seed Technology? Synthetic seed technology is a plant biotechnology technique that involves the production of artificial seeds from plant embryos. The process of producing synthetic seeds involves encapsulating a somatic embryo or shoot-tip culture in a protective coating. The protective coating is composed of a mixture of gelling agents, nutrients, and growth regulators that promote the growth and development of the plant embryo. Synthetic seeds offer several advantages over conventional seeds. They are easier to handle, transport, and store. They can also be used for planting in areas with adverse environmental conditions, such as drought-prone regions ...
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