Post the breakthrough of covid 19 vaccines, the advanced therapies integrated by RNA and gene therapy have achieved notable recognitions. With this proliferation, terminology and media coverage often lead to a lack of understanding between these two institutions. To help increase understanding and inform better decision making amongst physicians, this paper provides clear examples of how this applied science distinguishes one another, its mechanism and how each has been applied to real world patients.
What Is Gene Therapy?
Gene therapy is a medical approach that treats or prevents disease occurrence by modifying or replacing defective genes within cells for restoring normal function. Unlike other methodologies that centres on managing symptoms with therapeutic administration of proteins, biological drugs or chemical substances, Gene Therapy focuses on cell restoration and prevention of disease.
How It Works
Gene therapy aimed at identifying the root cause of a disorder and gene replacement, silencing or gene editing, alters or removes the faulty genes and eliminates future disease outbreaks. The three main operational mechanisms include, replacing genes by adding a functional copy, or deteriorating a muted gene, and repairing DNA sequences using technologies like CRISPR.
Common Delivery Methods Include:
- Viral Vectors – Viruses like AAV or lentivirus is disharmed by removing its threat and using them as a carrier for transfer healthy gene into nucleus.
- Non-Viral Vectors – Through methods of electroportation or the leverage of lipid narcoplastics, pushes DNA.
- Ex Vivo vs. In Vivo – Injections directly applied into the patient ‘s body (In vivo) or applied by removing the defect cells and returning it back are called EX vivo.
As gene therapy modifies DNA or stabilizes the cell nucleus, its impacts can be long lasting compared to other therapies, unlocking huge possibilities for the management of inherited or genetic conditions.
Advantages
- Targets the underlying cause of genetic based diseases rather than the management of symptoms alone
- Potential for permanent and durable treatment
- Expanding applications in the verticals of managing rare diseases, oncology, and regenerative medicine
What Is RNA Therapy?
RNA Treatments are defined as the use of RNA molecules to affect how genes are expressed without changing the actual DNA sequence below it. RNA therapies are intended to control the amount of protein produced from a gene (like increasing, decreasing, or correcting the way a gene is translated into functional proteins) instead of editing a gene. As a result of these characteristics, RNA therapies can be used to effectively change the gene pathway involved in disease occurrences.
Types of RNA Therapies Include:
1. Messenger RNA therapy (mRNA therapy) – This is where mRNA is used to instruct cells to produce particular proteins.
2. Small interfering RNA (siRNA) therapy – This form of RNA therapy suppresses the action of genes that cause disease.
3. Antisense oligonucleotides – This method alters how RNA is spliced or inhibits the translation of proteins.
RNA therapies tend to be temporary by nature because of the way that RNA will degrade in the human body. The temporary state of RNA therapies provides room for altered dosing based on patient response or clinical scenario.
Advantages
- The fact that RNA therapy does not change a person’s DNA means that there is a decreased chance of any unintended permanent changes.
- This type of therapy provides an extremely flexible platform for the treatment of a variety of diseases.
- It is also faster to develop and manufacture RNA therapies compared to other types of therapies.
- There is the potential for repeat dosing with controlled exposure to the drug.
Common Misconceptions and Clarifications
- “RNA Therapy Alters Your DNA”
RNA therapy is independent of DNA and does not change or affect your DNA. The RNA functions without entering the DNA stored cell nucleus but delivers instructions to the cell’s machinery without impacting the genome and leaving your DNA unchanged.
- “Gene Therapy and RNA Therapy Are the Same”
Gene therapy and RNA therapy are both advanced therapeutic modalities, but they are different from each other with respect to mechanism, duration of effect, and use. Using these two types of therapies interchangeably oversimplifies their clinical significance.
- “All Genetic Therapies Are Irreversible”
While some gene therapies are irreversible, however there are many variants that are reversible. RNA therapies are reversible by nature, typically the body returns to its starting stage when a patient stops taking RNA based medication, and therefore facilitates a broader range of treatment options.
- “Both Therapies Are Experimental and Unsafe”
This is an outdated perception. Both are subject to very strict clinical trial processes and regulatory check ins prior to receiving an approval to sell products. Many achieve FDA like global approvals after being administered in numerous thousands of people and detected safe and effective in real-world use.
- “RNA Therapies Are Only for Vaccines”
mRNA vaccines became widely recognized during the period of COVID pandemic, however, there are RNA-based therapies currently under development that offer versatile medications for conditions such as cancer, cardiovascular disease, and rare genetic conditions, illustrating the depth of RNA-based personalized therapies.
Conclusion
There are fundamentally distinct but equally powerful methodologies for treating molecular disease through RNA therapy and gene therapy. Gene Therapy primarily aims at correcting or replacing defective DNA that negatively affects a patient health. Thus,gene therapy will yield a permanent or long term effect. RNA therapy, on the other hand, has an inherently adaptable and reversible mechanism that allows for significantly greater accuracy in regulating gene expression. Both are concurrently suitable for specific clinical application and treatment requirements. As the industry is demanding more personalized interventions and precision targeting, understanding the misconceptions regarding its usage, impact and standard of functions is imperative for healthcare stakeholders to evolve and expand the future of precision medicine.
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