Application history and clinical role
Glucocorticoids entered medical practice as the very first pharmacological agents capable of effectively suppressing the immune system during organ transplantation. To this day, their therapeutic significance has not diminished: they continue to be in demand for combating autoimmune diseases and reliably protect patients from donor graft rejection. Prednisolone is considered the classic and reference drug in this group.
How glucocorticoids enter the cell
The molecular pathway of drugs in this group follows a strict sequence of biological stages:
- Unimpeded penetration through the cell membrane into the target cell.
- Precise binding to a specific intracellular receptor located in the cytosol.
- Translocation of the formed active hormone-receptor complex directly into the cell nucleus.
- Direct interaction with gene promoters, which triggers the regulation of DNA transcription processes.
Realization of the immunosuppressive effect
The effect on the cellular genetic apparatus allows drugs to successfully suppress unwanted immune reactions. Key mechanisms include:
- Inhibition of the transcription of genes responsible for encoding major histocompatibility complex (MHC) proteins.
- Effective suppression of the synthesis of various pro-inflammatory cytokines.
- Marked inhibition of active T-lymphocyte proliferation processes.
Briefly: answers to topical questions
The synthesis of which specific pro-inflammatory cytokines is suppressed by glucocorticoids?
Glucocorticoids suppress the synthesis and transcription of key pro-inflammatory cytokines that play an important role in the development of inflammatory and immune responses.
- Interleukin-1 (Interleukin-1) — inhibition of gene transcription and production.
- Interleukin-2 (Interleukin-2) — suppression of gene transcription and production.
- Interleukin-4 (Interleukin-4) — inhibition of production.
- Interleukin-6 (Interleukin-6) — suppression of gene transcription.
- Interleukin-8 (Interleukin-8) — inhibition of gene transcription.
- Tumor necrosis factor (Tumor necrosis factor) — suppression of gene transcription and production.
Class and exam questions
Which drug is considered the reference standard among glucocorticoid immunosuppressants?
The reference representative of this group of pharmacological agents is prednisolone.
Where were glucocorticoids first used for immunosuppression?
These drugs were historically the first to be used in organ transplantation surgeries.
What is the main molecular target of the hormone inside the cell?
The hormone binds to a specific intracellular cytosolic receptor, after which the complex translocates into the cell nucleus.
What else to study on this topic
- Historical context of the development of immunosuppressive therapy
- Detailed analysis of the structure of the major histocompatibility complex (MHC)
- The role of pro-inflammatory cytokines in the development of the immune response
- Mechanisms of T-lymphocyte proliferation and their blockade
- Features of DNA transcription regulation under the influence of hormones
Master the entire topic in the «Pharmacology» course
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Other topics in the section "Agents Regulating Immune Processes"
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