NURS 6630 Discussion Foundational Neuroscience
NURS 6630 Discussion Foundational Neuroscience
Explain the agonist-to-antagonist spectrum of action of psychopharmacologic agents, including how partial and inverse agonist functionality may impact the efficacy of psychopharmacologic treatments.
It’s important to understand what agonist and antagonist means when answering these questions. Agonists are drugs that bind to the intended receptors and the receptors produce a response (Berg & Clarke, 2018). Compared to antagonists drugs which bind to the intended receptor but do not produce a response (Berg & Clarke, 2018). Examples of agonist drugs are opioids. They bind to opioid receptors which produce a response and block pain sensation. An example of an antagonist is naloxone because it binds to opioid receptors but does not produce a response instead blocks the response of opiods. A partial agonist is what it sounds like. Basically it binds to the targerted receptor, but can’t produce the maximal and most efficient response compared to a full agonist. Inverse agonists are drugs that bind to the same receptors as an agonist but produce the opposite response of an agonist (Berg & Clarke, 2018).
Compare and contrast the actions of g couple proteins and ion gated channels.
Both G protein coupled receptors (GPCRs) and ion gated channels are membrane-bound proteins and react to ions or molecules. GPCRs are located on the cell’s surface and convert extracellular signals into intracellular responses (Li et al., 2014). GPCRs need to interact with different proteins to produce intracellular response. Ion gated channels are pores in the cell membrane which regulate flow of ions across the plasma membrane (Li et al., 2014). These pores open and close when ions and molecules bind.
Explain how the role of epigenetics may contribute to pharmacologic action.
According to the Centers for Disease Control and Prevention (2022), epigenetics is the study of how our behaviors and the environment can cause changes that affect the way our genes work. In comparison to genetics, epigenetic changes are reversible. Our behaviors and environment cannot change a person’s genetic sequence, but they can change how our bodies read gene expression. This contributes to pharmacological actions because everyone reacts differently to medication. Certain factors, such as our actions and surroundings, can influence how receptors respond. Certain diseases are linked to epigenetic changes, and certain drugs can reverse these changes and treat the disease.
Explain how this information may impact the way you prescribe medications to patients. Include a specific example of a situation or case with a patient in which the psychiatric mental health nurse practitioner must be aware of the medication’s action.
Understanding if a medication is an agonist or an antagonist is crucial in understanding what kind of response the medication will produce. Knowing the difference between a full agonist and partial agonist allows the prescriber to know how efficient the medication will be for the patient. Buprenorphine is a partial agonist and is used to treat addiction to pain medication but it also can treat pain. Understanding this drug is a partial agonist is important when perscribing because depending on the dose it will bind to a different receptor and produce different responses. A high dose of buprenorphine is typically used to address addiction issues and lower doses is used to treat pain. This medication is highly addictive, therefore understanding epigenetic factors is vital when prescribing it.
References
Berg, K. A., & Clarke, W. P. (2018). Making sense of pharmacology: inverse agonism and functional selectivity. The International Journal of
Neuropsychopharmacology, 21(10), 962–977.
https://doi.org/10.1093/ijnp/pyy071
Centers for Disease Control & Prevention (CDC) (2022).What is Epigenetics? Retrieved from https://www.cdc.gov/genomics/disease/epigenetics.htm
Li, S., Wong, A. H., & Liu, F. (2014). Ligand-gated ion channel interacting proteins and their role in neuroprotection. Frontiers in Cellular Neuroscience, 8, 125.
https://doi.org/10.3389/fncel.2014.00125
A psychiatric nurse practitioner’s need for a strong foundation in fundamental neuroscience is almost self-evident. To effectively treat and diagnose patients, it is necessary to understand not only the pathophysiology of psychiatric disorders, but also how medications for these disorders affect the central nervous system. These fundamental concepts of neuroscience can be difficult to grasp. As such, this Discussion is intended to encourage you to think critically about these concepts, to articulate your reasoning, and to deepen your understanding through interaction with your colleagues.
Photo Credit: Getty Images/Cultura RF
For this Discussion, review the Learning Resources and reflect on the concepts of foundational neuroscience as they might apply to your role as the psychiatric mental health nurse practitioner in prescribing medications for patients.
By Day 3 of Week 2 of NURS 6630 Discussion Foundational Neuroscience
Post a response to each of the following:
Include how partial and inverse agonist functioning may affect the effectiveness of psychopharmacologic therapies in your explanation of the agonist-to-antagonist spectrum of action of psychopharmacologic drugs.
Drugs are absorbed, and each person’s mode of action is unique. Each person’s response to drugs varies, thus extra care must be given when giving prescriptions. A medication that binds to and activates a receptor to mimic the effects of the signal ligand is known as an agonist. Contrarily, an antagonist is a substance that often attaches to a receptor without activating it but instead makes the receptor less susceptible to being activated by a subsequent agonist.
Drugs can engage in a range of interactions with certain pharmacological subtypes of G-protein-linked receptors, including agonist, antagonist, inverse agonist, and partial agonist actions (Van den Houvel 2014). If the medication’s intended pharmacological effect fails because it is not bound to the receptors necessary for an effect to take place, another strategy needs to be investigated.
In order to function, neurotransmitters must carry information from a first extracellular messenger to a second intracellular messenger via transduction cascades. Ion-gated channels and G-coupled proteins are opened as a result of these cascades (Mclnemey 2014). According to Mclnemey (2014), altering the activities of G-protein-linked receptors is a frequent activity of psychiatric drugs used largely in clinical practice. This alteration can have either a therapeutic response or adverse effects.
Given medications can trigger conformational changes in these receptors to produce any state, including complete agonist, partial agonist, silent antagonist, or inverse agonist, due to the agonist spectrum that G-protein-linked receptors show. According to Stern et al., ion channels function by controlling iron firing, synaptic proteins that affect synaptic efficacy, and cytoskeletal elements (2016).
Also Check Out: NURS 6630 Week 1 Introduction to Neuroanatomy Assignments
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When a gene’s function changes without its genetic coding changing, this is known as epigenetics. Epigenetics is known to produce changes in the DNA’s structure, and these changes are frequently inherited (Stern et al., 2016). Stern et al. (2016) claim that medications that impact chromatin structures can be used to treat gene modifications that also affect chromatin structure changes.
According to Van den Houvel (2014), the expression or silencing of genes may affect how some neurons function normally compared to how others do not, as well as whether or not they are indeed neurons as opposed to some other form of cell. Since certain receptors and neurons target specific genes, neurotransmission, medications, genes, and the environment all interact to control which genes are expressed or silenced as well as which genes decide the entire person.
- As part of NURS 6630 Discussion Foundational Neuroscience, Explain how this information may impact the way you prescribe medications to patients. Include a specific example of a situation or case with a patient in which the psychiatric mental health nurse practitioner must be aware of the medication’s action.
Having knowledge on how the body works is very important in prescribing medication safely and effectively. It is important to understand how certain medication bind with certain receptors and the expected effects. It is crucially important that the psychiatric mental health practitioner (PMHNP) understands the basic action of psychotropic medications with neurotransmitters as well as transmission across receptors and neurons. It is important to understand that ions-gated receptors create a fast cascade of reaction necessary in quick actions that occur with the administration of benzodiazepines in the management of anxiety.
KIt is also crucial to understand that G-protein linked acts in a slower cascade of initiation in the necessary with the management of depression If the medication is supposed to work as a blocking agent or as an activating agent while increasing the expected effect, it is very imperative to keep into consideration into all these information when prescribing medication. A good example is when you have a patient with mood changes and in this case, mood stabilizer medication is required to target the behavior. Knowing the action of mood stabilizers therefore is important because through that knowledge of understanding the patient needs and the intervention to target the need is very essential.
Read a selection of your colleagues’ responses.
By Day 6 of Week 2 of NURS 6630 Discussion Foundational Neuroscience
Respond to at least two of your colleagues on two different days in one of the following ways:
- If your colleagues’ posts influenced your understanding of these concepts, be sure to share how and why. Include additional insights you gained.
- If you think your colleagues might have misunderstood these concepts, offer your alternative perspective and be sure to provide an explanation for them. Include resources to support your perspective.
Thank you for your great discussion post; you were so detailed here. I will be glad to add that neuroscience is the study of the nervous system including its structure, development, degeneration, functions both in health and in a disease state
According to Rosenthal and Burcham (2021), agonists are drugs that mimic the actions of endogenous regulatory molecules, whereas the antagonist action is produced when the drug blocks the action of the endogenous regulatory molecules. I also agree with you that every individual reacts to drugs differently; hence extra care must be considered when prescribing drugs. However, the effect a partial agonist can produce is lower than that of a full agonist. Partial agonist med they are also referred to as agonists-antagonists (Katzung et al., 2019). Epigenetics studies human behaviors and how the environment causes changes that affect them. The study of epigenetics is essential in the healthcare industry. This will help advanced nurse practitioners to understand how human behavior and environment interact to affect the genetic make-up of a person. It will also enable the providers to make the right diagnosis and also the right treatment. Understanding the agonist-to-antagonist spectrum of drugs will prevent prescription medication; however, the study will lead to the right practices. Thank you.
NURS 6630 Discussion Foundational Neuroscience References
Katzung, B. G., Hall, M. K., & Trevor, A. J. (2019). Katzung & Trevor’s Pharmacology
Examination & Board Review (12th ed.). McGraw-Hill Education.
Rosenthal, L. D., & Burchum, J. R. (2021). Lehne’s Pharmacotherapeutics for advanced
St. Louis, MO: Elsevier practice nurses and physician assistants (2nd ed.).
Note: For this Discussion, you are required to complete your initial post before you will be able to view and respond to your colleagues’ postings. Begin by clicking on the “Post to Discussion Question” link and then select “Create Thread” to complete your initial post. Remember, once you click on Submit, you cannot delete or edit your own posts, and you cannot post anonymously. Please check your post carefully before clicking on Submit!
Submission and Grading Information
Grading Criteria
To access your rubric:
Week 2 Discussion Rubric
Post by Day 3 of Week 2 and Respond by Day 6 of Week 2
To Participate in this Discussion:
Week 2 Discussion
What’s Coming Up in Week 3?
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Next week, you will explore medication adherence and strategies to help overcome non-adherence to pharmacotherapeutics. You will also complete a Quiz that addresses the content covered throughout this module.
Next Week
Name: NURS_6630_Week2_Discussion_Rubric
Excellent
Point range: 90–100 |
Good
Point range: 80–89 |
Fair
Point range: 70–79 |
Poor
Point range: 0–69 |
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Main Posting:
Response to the Discussion question is reflective with critical analysis and synthesis representative of knowledge gained from the course readings for the module and current credible sources. |
Points Range: 40 (40%) – 44 (44%)
Thoroughly responds to the Discussion question(s). Is reflective with critical analysis and synthesis representative of knowledge gained from the course readings for the module and current credible sources. No less than 75% of post has exceptional depth and breadth. Supported by at least three current credible sources. |
Points Range: 35 (35%) – 39 (39%)
Responds to most of the Discussion question(s). Is somewhat reflective with critical analysis and synthesis representative of knowledge gained from the course readings for the module. 50% of the post has exceptional depth and breadth. Supported by at least three credible references. |
Points Range: 31 (31%) – 34 (34%)
Responds to some of the Discussion question(s). One to two criteria are not addressed or are superficially addressed. Is somewhat lacking reflection and critical analysis and synthesis. Somewhat represents knowledge gained from the course readings for the module. Post is cited with fewer than two credible references. |
Points Range: 0 (0%) – 30 (30%)
Does not respond to the Discussion question(s). Lacks depth or superficially addresses criteria. Lacks reflection and critical analysis and synthesis. Does not represent knowledge gained from the course readings for the module. Contains only one or no credible references. |
|
Main Posting:
Writing |
Points Range: 6 (6%) – 6 (6%)
Written clearly and concisely. Contains no grammatical or spelling errors. Adheres to current APA manual writing rules and style. |
Points Range: 5 (5%) – 5 (5%)
Written concisely. May contain one to two grammatical or spelling errors. Adheres to current APA manual writing rules and style. |
Points Range: 4 (4%) – 4 (4%)
Written somewhat concisely. May contain more than two spelling or grammatical errors. Contains some APA formatting errors. |
Points Range: 0 (0%) – 3 (3%)
Not written clearly or concisely. Contains more than two spelling or grammatical errors. Does not adhere to current APA manual writing rules and style. |
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Main Posting:
Timely and full participation |
Points Range: 9 (9%) – 10 (10%)
Meets requirements for timely, full, and active participation. Posts main Discussion by due date. |
Points Range: 8 (8%) – 8 (8%)
Posts main Discussion by due date. Meets requirements for full participation. |
Points Range: 7 (7%) – 7 (7%)
Posts main Discussion by due date. |
Points Range: 0 (0%) – 6 (6%)
Does not meet requirements for full participation. Does not post main Discussion by due date. |
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First Response:
Post to colleague’s main post that is reflective and justified with credible sources. |
Points Range: 9 (9%) – 9 (9%)
Response exhibits critical thinking and application to practice settings. Responds to questions posed by faculty. The use of scholarly sources to support ideas demonstrates synthesis and understanding of learning objectives. |
Points Range: 8 (8%) – 8 (8%)
Response has some depth and may exhibit critical thinking or application to practice setting. |
Points Range: 7 (7%) – 7 (7%)
Response is on topic, may have some depth. |
Points Range: 0 (0%) – 6 (6%)
Response may not be on topic, lacks depth. |
|
First Response: Writing |
Points Range: 6 (6%) – 6 (6%)
Communication is professional and respectful to colleagues. Response to faculty questions are fully answered, if posed. Provides clear, concise opinions and ideas that are supported by two or more credible sources. Response is effectively written in Standard, Edited English. |
Points Range: 5 (5%) – 5 (5%)
Communication is mostly professional and respectful to colleagues. Response to faculty questions are mostly answered, if posed. Provides opinions and ideas that are supported by few credible sources. Response is written in Standard, Edited English. |
Points Range: 4 (4%) – 4 (4%)
Response posed in the Discussion may lack effective professional communication. Response to faculty questions are somewhat answered, if posed. Few or no credible sources are cited. |
Points Range: 0 (0%) – 3 (3%)
Responses posted in the Discussion lack effective communication. Response to faculty questions are missing. No credible sources are cited. |
|
First Response: Timely and full participation |
Points Range: 5 (5%) – 5 (5%)
Meets requirements for timely, full, and active participation. Posts by due date. |
Points Range: 4 (4%) – 4 (4%)
Meets requirements for full participation. Posts by due date. |
Points Range: 3 (3%) – 3 (3%)
Posts by due date. |
Points Range: 0 (0%) – 2 (2%)
Does not meet requirements for full participation. Does not post by due date. |
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Second Response: Post to colleague’s main post that is reflective and justified with credible sources. |
Points Range: 9 (9%) – 9 (9%)
Response exhibits critical thinking and application to practice settings. Responds to questions posed by faculty. The use of scholarly sources to support ideas demonstrates synthesis and understanding of learning objectives. |
Points Range: 8 (8%) – 8 (8%)
Response has some depth and may exhibit critical thinking or application to practice setting. |
Points Range: 7 (7%) – 7 (7%)
Response is on topic, may have some depth. |
Points Range: 0 (0%) – 6 (6%)
Response may not be on topic, lacks depth. |
|
Second Response: Writing |
Points Range: 6 (6%) – 6 (6%)
Communication is professional and respectful to colleagues. Response to faculty questions are fully answered, if posed. Provides clear, concise opinions and ideas that are supported by two or more credible sources. Response is effectively written in Standard, Edited English. |
Points Range: 5 (5%) – 5 (5%)
Communication is mostly professional and respectful to colleagues. Response to faculty questions are mostly answered, if posed. Provides opinions and ideas that are supported by few credible sources. Response is written in Standard, Edited English. |
Points Range: 4 (4%) – 4 (4%)
Response posed in the Discussion may lack effective professional communication. Response to faculty questions are somewhat answered, if posed. Few or no credible sources are cited. |
Points Range: 0 (0%) – 3 (3%)
Responses posted in the Discussion lack effective communication. Response to faculty questions are missing. No credible sources are cited. |
|
Second Response: Timely and full participation |
Points Range: 5 (5%) – 5 (5%)
Meets requirements for timely, full, and active participation. Posts by due date. |
Points Range: 4 (4%) – 4 (4%)
Meets requirements for full participation. Posts by due date. |
Points Range: 3 (3%) – 3 (3%)
Posts by due date. |
Points Range: 0 (0%) – 2 (2%)
Does not meet requirements for full participation. Does not post by due date. |
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Total Points: 100 | |||||
Name: NURS_6630_Week2_Discussion_Rubric
NURS 6630 Discussion Foundational Neuroscience