PHARMACOGENOMICS
INTRODUCTION
Pharmacogenomics is the study of how an individual's genetic inheritance affects the body's response to drugs. The term comes from the words pharmacology and genomics and is thus the intersection of pharmaceuticals and genetics. Pharmacogenomics holds the promise that drugs might one day be tailor-made for individuals and adapted to each person's own genetic makeup. Environment, diet, age, lifestyle, and state of health all can influence a person's response to medicines, but understanding an individual's genetic makeup is thought to be the key to creating personalized drugs with greater efficacy and safety.
Pharmacogenomics combines traditional pharmaceutical sciences such as biochemistry with annotated knowledge of genes, proteins, and single nucleotide polymorphisms.
BENEFITS OF PHARMACOGENOMICS
1- More Powerful Medicines
Pharmaceutical companies will be able to create drugs based on the proteins, enzymes, and RNA molecules associated with genes and diseases. This will facilitate drug discovery and allow drug makers to produce a therapy more targeted to specific diseases. This accuracy not only will maximize therapeutic effects but also decrease damage to nearby healthy cells.
2- Better, Safer Drugs the First Time
Instead of the standard trial-and-error method of matching patients with the right drugs, doctors will be able to analyze a patient's genetic profile and prescribe the best available drug therapy from the beginning. Not only will this take the guesswork out of finding the right drug, it will speed recovery time and increase safety as the likelihood of adverse reactions is eliminated. Pharmacogenomics has the potential to dramatically reduce the the estimated 100,000 deaths and 2 million hospitalizations that occur each year in the United States as the result of adverse drug response (1).
3- More Accurate Methods of Determining Appropriate Drug Dosages
Current methods of basing dosages on weight and age will be replaced with dosages based on a person's genetics --how well the body processes the medicine and the time it takes to metabolize it. This will maximize the therapy's value and decrease the likelihood of overdose.
4- Advanced Screening for Disease
Knowing one's genetic code will allow a person to make adequate lifestyle and environmental chan...
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...eactions to drugs, (c) the definition of genetic markers for drug efficacy, and (d) characterization, at the molecular level, of inter-individual differences in susceptibility to xenobiotic-induced adverse health effects that can be used as the basis for development of more differentiated and more accurate assessments of human risk.
References
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2. J. Hodgson, and A. Marshall, 1998. Pharmacogenomics: will the regulators approve? Nature Biotechnolgy. Vol. 16, PP. 243-246.
3. S. Pistoi, 2002. Facing your genetic destiny, part II. Scientific American.
4. http://pubs.acs.org/cen/coverstory/7933/7933pharmacogenomics.html
5. http://www.perlegen.com/science/pharmacogenomics.html
6. George Orphanides and Ian Kimber, 2004. Review; Toxicogenetics: Applications and Opportunities. Toxicological Sciences, Vol. 75, pp. 1–6.
In conclusion, it is important for nurses to have proper training and information in the area of genetics and genomics so that it can be used in daily clinical practice (Thompson & Brooks, 2011). Using this information with clients and conducting a detailed genetic nursing assessment is a valuable component of being an effective health care provider and can help clients recognize, prevent, and/or treat diseases that are unique to their particular
The varieties of pharmaceutical and prescription drugs that are available to the public provide many different consequences, which could lead to other health problems among users. Opioids, for example, are typical...
In today’s modern age science is moving at a rapid pace; one of those scientific fields that has taken the largest leaps is that of genetics. When genetics first comes to mind, many of us think of it as a type of science fiction, or a mystical dream. Yet genetics is here, it is real, and has numerous ethical implications.
This paper discusses pharmacology and terminology related to “Pharmacology” which is the branch of medicine concerned with the uses, effects, and modes of action of drugs“ pharmacology. 2015. In Merriam-Webster.com. The study of different classes of drugs, routes of absorption, and drugs have effects on those consuming them. There are drugs that are necessary for illnesses and healing but, there are medicines that cause concern regarding interaction and harming the body.
The ultimate goal of pharmacogenomics, as stated by Henig, “would be for everyone’s genome to be analyzed indi...
“Dr. Janet Woodcock, director of the F.D.A. 's Center for Drug Evaluation and Research said people are being harmed and some of the harm is preventable ' ' (Le Fanu, 2014). With millions of drugs on the market, and with multiple drugs just for one ailment, it wouldn’t take much to cause a wrong combination that could cause injury or death. Hospitals across the U.S. reported in 2011 adverse reactions from prescription drugs caused 2.2 million injuries and 106,000 deaths that two-thirds could have been prevented with proper monitoring of prescription drugs. (Bremner,
Genetics can predetermine many things for an individual but health and prevention can aid in the prevention of the expression of some genes. This is why it is important for healthcare providers to promote their patient’s awareness of what he or she is at risk for so that they can live the healthiest life possible. It is much easier to prevent a disease than it is to cure one. As healthcare providers it is our responsibility to cure illnesses, sure, but more importantly it is our responsibility to prevent disease and increase our patient’s quality of
...hich inherited traits, such as those for genetic disease, can be tracked over generations. Throughout out the course of human development, scientists will continue to find new new ways to help the human race through the discovery of the human gene inside of each of us, its uses, as well as complications, that can help the survival of our species.
Adverse drug events or medication errors that result from polypharmacy can often be difficult to predict and prevent. According to an article posted in the American Journal of Health-System Pharmacy (2012), drug –drug interactions may lead to increased toxicity levels when taken together. An example is the interactio...
Stokes, W.S. “Animals and the 3 R’s on Toxicology Research and Testing.” Human and Experimental Toxicology December 2015: 7. Academic Search Premier. Web. 14 February
As we discussed above that pharmacokinetic and pharmacodynamics can be seen as two sides of the same coin in order to gain better understanding of their efficacy and safety profiles.” Generally it is possible to make fairly robust predictions of the pharmacokinetic profile in man using in vitro systems and preclinical pharmacokinetic studies. A previously published survey on the causes of failure in drug development indicated that inappropriate pharmacokinetics were a major cause such as; factors as low bioavailability due to high extraction or poor absorption characteristics, short elimination half-life leading to short duration of action and excessive variability due to genetic or environmental factors. This observation has led to an increased emphasis on pharmacokinetic input to the drug discovery process throughout the pharmaceutical industry. However, it is important to realise that this may only permit the rejection of compounds to b...
The use of genetic sequencing in the medical field has innumerable possibilities; genomic medicine, as this new field is now called, will enable the human race to make immense advances in understanding how our genetic heredity makes us susceptible to some illnesses and immune to others. The detection of diseases with a high rate of heredity is just one facet of the gem that is genomics; once researchers are able to map out all of the vital components and rare alleles that sometimes play a large factor in disease, it will be possible to target these specific gene combinations, functional elements, and alleles. Because of the fact that protein, produced by our cells’ ribosomes, has an effect on the pathways that help express our inherited traits, it is important that we understand the relationship between DNA and protein, and how this affects the phenotype of an individual’s genetic attributes. For example, sickle-cell anemia is caused by a flaw in one nitrogenous base sequence in DNA. This flaw then translates into RNA, then into amino acids that determine the phenotype that the subject will have. The discrepancy in something as minute as a nitrogenous base and one amino acid makes the difference between a healthy, normal life and a life ...
Polypharmacy among the elderly is a growing concern in U.S. healthcare system. Patients who have comorbities and take multiple medications are at a higher risk for potential adverse drug reactions. There is a great need for nursing interventions in conducting a patient medication review also known as “brown bag”. As nurses obtain history data from patients at a provider visit, the nurse should ask “what medications are you taking?” and the answer needs to include over-the-counter medications as well. If the response does not include any medications other than prescribed meds, it is incumbent upon the nursing professionals to question the patient further to ensure that no over-the-counter medications or supplements are being consumed. This is also an opportunity for the nurse to question about any adverse reactions the patient may be experiencing resulting from medications. Polypharmacy can result from patients having multiple prescribers and pharmacies, and patients continuing to take medications that have been discontinued by the physician. Nurses are in a unique position to provide early detection and intervention for potentially inappropriate medications and its associated adverse drug reactions.
Polypharmacy among the elderly is a growing concern in U.S. healthcare system. Elderly who have comorbities and take multiple medications are at a higher risk for potential adverse drug reactions. Elderly who take over-the-counter medications, herbs, and supplements without consulting their physician are at risk for adverse reactions associated with polypharmacy. Polypharmacy can result from patients having multiple prescribers and pharmacies, and patients who continue to take medications which have been discontinued by the physician. There is a great need for nursing interventions regarding polypharmacy, including medication reviews also known as “brown bag”. As nurses obtain history data and conduct a patient assessment, it is essential to review the patients’ medications and ask open-ended questions regarding all types of medications in which the patient is taking. In addition, the patient assessment is also an opportunity for the nurse to inquire about any adverse reactions the patient may be experiencing resulting from medications. Nurses are in a unique position to provide early detection and intervention for potentially inappropriate medications and its associated adverse drug reactions.
Genetics & Personalized Medicine. (2013). University of Ottawa Heart Institute. Retrieved on February 3, 2014 from: http://www.ottawaheart.ca/research_discovery/genetics-personalized-medicine.htm