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Gene delivery is the process of introducing foreign genetic material, such as DNA or RNA, into host cells. [1] Gene delivery must reach the genome of the host cell to induce gene expression . [ 2 ] Successful gene delivery requires the foreign gene delivery to remain stable within the host cell and can either integrate into the genome or ...
Sentinel cells refer to cells in the body's first line of defense, which embed themselves in tissues such as skin. [1] Sentinel cells represent diverse array of cell types with the capability to monitor the presence of exogenous or potentially harmful particles and play a crucial role in recognizing and sampling signs of infection or abnormal cellular activity and/or death.
The target selection process of an axon to develop synaptic connections with specific cells can be broken down into multiple stages that are not necessarily confined to exact chronological order. [2] The stages of targeting include: [1] [2] region specification; target cell specification; subcellular specification; synaptic refinement
Prior to entry, a virus must attach to a host cell. Attachment is achieved when specific proteins on the viral capsid or viral envelope bind to specific proteins called receptor proteins on the cell membrane of the target cell. A virus must now enter the cell, which is covered by a phospholipid bilayer, a cell's natural barrier to the outside ...
The nano and micro versions of electroporation feature much higher precision and control over the size and location of membrane disruptions imposed on target cells . [78] A company called Maxcyte has developed a high-throughput version of flow electroporation that can process hundreds of millions of cells in tens of minutes . [79]
Conjugative systems: used for DNA transfer via cell to cell contact (a process called conjugation); DNA release and uptake systems: used to exchange DNA with the extracellular environment (a process called transformation); and effector systems: used to transfer proteins to target cells. [4]
If a cell is in a determined state, the cell's fate cannot be reversed or transformed. In general, this means that a cell determined to differentiate into a brain cell cannot be transformed into a skin cell. Determination is followed by differentiation, the actual changes in biochemistry, structure, and function that result in specific cell types.
The first signal is the major histocompatibility complex (MHC), which in humans is also called the human leukocyte antigen (HLA). This is the molecule which is loaded with the specific antigen. MHC class I are found on all cells and stimulate cytotoxic T cells (CD8 cells), and MHC class II are found on APCs and stimulate helper T cells (CD4