Pharmaceutical Research Module Quiz

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Questions and Answers

What is the purpose of the hit discovery process?

  • To evaluate the safety of a drug candidate
  • To synthesize known drugs
  • To screen for compounds with the desired activity (correct)
  • To develop new therapeutic strategies

Which method is NOT mentioned as part of the hit discovery process?

  • High-throughput screening
  • Computer-aided structure-based drug design
  • Natural extracts screening
  • Patient-derived testing (correct)

What is a lead compound?

  • A chemical compound that has been abandoned
  • Any compound that has undergone structural modifications
  • A compound that shows minimal therapeutic potential
  • A chemical compound that shows promise for treating a disease (correct)

What is the primary focus of lead optimization?

<p>Improving potency and physicochemical properties (A)</p> Signup and view all the answers

What does SAR stand for in the context of drug development?

<p>Structure-Activity Relationship (A)</p> Signup and view all the answers

Which of the following modifications is NOT a systematic approach mentioned?

<p>Natural product extraction (A)</p> Signup and view all the answers

In the hit discovery process, which screening method allows for the evaluation of many compounds?

<p>High-throughput screening (C)</p> Signup and view all the answers

What characterizes a hit compound in drug discovery?

<p>It shows the desired type of activity in assays. (B)</p> Signup and view all the answers

What is one reason why aspirin might lose its potency when stored improperly?

<p>Moisture (B)</p> Signup and view all the answers

Which of the following composes the basic structure of organic chemistry?

<p>Carbon compounds (D)</p> Signup and view all the answers

In the context of drug design, what do the terms 'hit' and 'lead' refer to?

<p>The discovery of a potential drug and its further optimization (A)</p> Signup and view all the answers

What is an important aspect of understanding reaction kinetics in chemistry?

<p>Determining the mechanism of a reaction (D)</p> Signup and view all the answers

What is the role of enzymes in drug interactions?

<p>To speed up reaction rates (B)</p> Signup and view all the answers

Which of the following is a key factor influencing drug solubility?

<p>Lipophilicity (D)</p> Signup and view all the answers

Why is thermodynamics important in the study of chemistry?

<p>It explains the energy changes associated with chemical reactions (D)</p> Signup and view all the answers

What is the primary goal of in vitro assays conducted during preclinical research?

<p>To study drug toxicity and off-target effects (C)</p> Signup and view all the answers

What is a practical implication of knowledge in spectroscopy in chemistry?

<p>Analyzing the composition of substances (C)</p> Signup and view all the answers

Which of the following accurately describes the purpose of Phase I clinical trials?

<p>To assess the drug's safety and pharmacokinetics in healthy volunteers (D)</p> Signup and view all the answers

Which component is NOT part of the in vivo ADME process during drug development?

<p>Manufacturing of drug dosage forms (D)</p> Signup and view all the answers

What is the expected probability of a drug entering Phase II clinical trials?

<p>66.4% (C)</p> Signup and view all the answers

Which route of administration is NOT mentioned as a method to prevent drug interaction with healthy tissues?

<p>Transdermal delivery (A)</p> Signup and view all the answers

What is the primary focus of Phase III clinical trials?

<p>Assess drug safety and overall benefit-risk relationship (C)</p> Signup and view all the answers

During preclinical research, lead compounds are tested on which of the following?

<p>Non-human subjects in in vivo animal models (A)</p> Signup and view all the answers

How long does clinical development typically take, from the selection of potential drug candidates to market?

<p>3-5 years (A)</p> Signup and view all the answers

What is the probability of drugs being approved during clinical trials?

<p>59% (B)</p> Signup and view all the answers

Which factor is NOT a common reason for failure in clinical trials?

<p>High efficacy (A)</p> Signup and view all the answers

Which regulatory agency is responsible for drug approval in the USA?

<p>FDA (C)</p> Signup and view all the answers

What percentage decline in clinical trial starts was observed in 2023 compared to 2022?

<p>15% (A)</p> Signup and view all the answers

How many novel active substances (NAS) were launched globally in 2023?

<p>69 (B)</p> Signup and view all the answers

What was a contributing factor to the decline in clinical trial starts in 2023?

<p>COVID-19 trials decline (A)</p> Signup and view all the answers

Which statement is accurate regarding the approval process for new drugs?

<p>2 out of 5 drugs that reach Phase III fail to win approval. (B)</p> Signup and view all the answers

What aspect of drug development is NOT typically assessed during clinical trials?

<p>Patient comfort (C)</p> Signup and view all the answers

What percentage of new product launches in the past five years were in oncology, neurology, and immunology?

<p>56% (B)</p> Signup and view all the answers

What does the composite success rate in drug R&D indicate for 2023?

<p>Increased to 10.8% (C)</p> Signup and view all the answers

Which of the following is NOT a category included in infectious diseases treatments mentioned?

<p>Anti-inflammatory (C)</p> Signup and view all the answers

What is the main purpose of post-marketing monitoring?

<p>To monitor the safety of approved drugs (C)</p> Signup and view all the answers

How many drugs have been recalled from the market according to the information provided?

<p>More than 500 (B)</p> Signup and view all the answers

During which phase are healthy volunteers assessed for safety and pharmacokinetics?

<p>Phase I (B)</p> Signup and view all the answers

Which substance was noted for causing serious hepatotoxicity leading to liver transplant or death?

<p>Alatrofloxacin (A)</p> Signup and view all the answers

Which step is part of the correct drug development process sequence?

<p>Pre-clinical (A)</p> Signup and view all the answers

Flashcards

Pharmaceutical Chemistry

A field that deals with the design, development, and production of pharmaceuticals.

Medicinal Chemistry

A science that focuses on the discovery, development, and optimization of drugs.

Computer-Aided Drug Design

A method that utilizes computational techniques to identify potential drug candidates.

Active Small Molecules

Small molecules that have a specific biological activity.

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Molecular Modelling

A technique that uses computer simulations to model molecular interactions.

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Flipped Classroom

A teaching method where students actively participate in learning by completing tasks before lecture.

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Summative Assessment

A component of a course that is graded for performance.

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Formative Assessment

A component of a course intended to check understanding, but not graded.

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Chemistry in Pharmacy

The study of the composition, structure, properties, and reactions of matter. It's fundamental to understanding how drugs work and how they interact with the body.

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Solubility

The tendency of a substance to dissolve in a solvent; important for how well a drug can be absorbed by the body.

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Lipophilicity

The tendency of a molecule to be attracted to fats or lipids; important for drug's ability to cross cell membranes.

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Organic Chemistry

The branch of chemistry that studies the structure and reactions of carbon-containing compounds; crucial for understanding the vast majority of drugs and drug targets.

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Enzymes

Specialized molecules within the body that accelerate chemical reactions; essential for drug metabolism and breakdown.

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Receptors

Proteins on the surface of cells that act as receptors for drugs; they mediate drug action.

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Reaction Kinetics

A branch of chemistry that studies the rate and mechanism of chemical reactions; important for understanding how drugs degrade and their stability.

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Thermodynamics

The principles of energy and its transformation within systems; helps explain how drugs exert their effects at the molecular level.

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Hit Compound

A molecule that shows the desired activity in a screening assay, indicating potential as a drug candidate.

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Screening Assays

Test systems used to evaluate the effects of drug candidates at different levels, such as cellular or biochemical.

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Hit Discovery

A process involving screening many compounds to identify potential drug candidates.

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Structure-Activity Relationship (SAR)

A systematic approach to modify the structure of a hit molecule to improve its activity and properties.

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Lead Compound

A chemical compound that demonstrates promising activity and potential for drug development.

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Lead Optimization

A process that aims to optimize the properties of a lead compound, making it more potent and better suited for development.

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High-Throughput Screening (HTS)

High-throughput screening (HTS) is a powerful technique that makes it possible to screen millions of compounds for potential drug candidates.

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Virtual Screening

Virtual screening is a computer-based method used to predict the binding affinity of molecules to a target, identifying potential drug candidates.

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In vitro Testing

The initial stage of drug development where potential drug candidates are screened and tested for their activity against the targeted disease.

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Off-Target Effects

Studies conducted to evaluate a drug's potential for off-target effects, like harm to healthy cells or DNA.

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Pharmacokinetics (PK)

Measurements of how a drug interacts with the body, including how it's absorbed, distributed, metabolized, and excreted.

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In Vivo Animal Models

Tests on living animals (mice, hamsters, dogs, etc.) using unrestricted dosages to assess a drug's effectiveness, safety, and how it's processed by the body.

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Dosage Optimization

The process of finding the optimal dosage for a drug, balancing effectiveness with safety.

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Drug Administration Routes

Different ways to deliver a drug into the body, such as orally, topically, or through injections.

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Clinical Trial Phases

The three phases of human clinical trials, involving healthy volunteers and patients, to test the drug's safety, efficacy, and overall benefit-risk profile.

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Phase III Clinical Trial

The final stage of clinical development where the drug is tested on a large number of patients to gather comprehensive data on its safety, efficacy, and overall benefit-risk profile.

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Phase I Trial

A phase of drug development where a new drug is tested on a small group of healthy volunteers to assess safety and effectiveness. The aim is to evaluate the drug's kinetic properties, i.e., how it is absorbed, distributed, metabolized, and excreted by the body.

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Phase II Trial

A phase of drug development where a new drug is tested on a larger group of patients with the target disease to determine efficacy and safety. This phase involves more detailed studies to better understand the drug's effectiveness, optimal dosage, and adverse effects.

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Phase III Trial

A phase of drug development where a new drug is tested on a large group of patients with the target disease to confirm efficacy, monitor safety and compare it to standard treatments. This phase is often designed to evaluate the drug's long-term safety and effectiveness, and its benefit-risk profile is carefully assessed.

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Phase IV Trial

A phase in drug development where a new drug is monitored for effectiveness and safety in a broader population after it has received regulatory approval. This phase is important for post-market surveillance to track unexpected effects or long-term consequences of the drug.

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Drug Failure in Clinical Trials

A situation where a drug fails to show sufficient benefit in clinical trials or exhibits unacceptable side effects. It can be due to factors like insufficient efficacy, high toxicity, poor pharmacokinetic properties, or problems with patient recruitment.

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Drug Review Process

A process where regulatory agencies like the Food and Drug Administration (FDA) evaluate the data from clinical trials to assess the safety and efficacy of a new drug before granting approval. This includes reviewing clinical trial reports, manufacturing processes, and labelling information.

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Probability of Drug Approval

The probability or likelihood of a new drug being approved after completing clinical trials. It reflects the success rate of drugs progressing through the regulatory process.

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Regulatory Agencies (e.g., FDA, EMA, MHRA)

A regulatory authority responsible for approving new drugs and ensuring their safety and effectiveness. These agencies play a crucial role in protecting public health by regulating the pharmaceutical industry.

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What is Clinical Phase I?

The phase of drug development where the safety and pharmacokinetics of a potential drug are evaluated in a small group (~100) of healthy volunteers to determine safe dosage and identify potential side effects.

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What is a 'Hit Compound'?

A molecule that exhibits the desired activity in a screening assay, demonstrating its potential as a drug candidate.

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What is Post-Marketing Monitoring (Phase IV)?

The process of monitoring the safety of an approved drug after it is released to the market. This includes collecting reports from healthcare professionals, patients, and manufacturers to identify any potential risks or side effects.

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What has contributed to the rise in the success rate of drug development?

The composite success rate in drug discovery has been influenced by improvements in various stages of the drug development process, including Phase I (safety), Phase III (efficacy), and regulatory approvals.

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What is a 'Lead Compound'?

A molecule that has shown promising activity in pre-clinical studies and is considered a potential drug candidate, and is further developed to optimize its properties for clinical trials.

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What is 'Structure-Activity Relationship (SAR)'?

The process of systematically altering the structure of a 'hit compound' to enhance its activity, potency, and other properties, aiming to make it a more suitable drug candidate.

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What is 'Hit Discovery'?

The field of drug discovery that involves searching for and identifying potential drug candidates from a large library of chemical compounds.

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What are the fastest-growing therapeutic areas for new drug launches in recent years?

They represent a significant part of new drug launches in recent years, with 56% of launches between 2019-2023 belonging to this category.

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Study Notes

Drugs and Medicines PMP-102

  • The lecture covers the long journey from molecule to medicines.
  • The lecturer, Dr. Salvatore Ferla, is associated with Swansea University.

About Myself (Salvo)

  • Holds a Master's Degree in Medicinal Chemistry (2008).
  • Was a co-supervisor of Pharmaceutical Production (QA, GMP) from 2008-2009.
  • Registered as a qualified pharmacist since 2008.
  • Earned a PhD in Medicinal Chemistry (2009-2013).
  • Worked as a Research Associate in Medicinal Chemistry/Drug Design (2013-2018).
  • Worked as a Research Fellow in Medicinal Chemistry/Drug Design (2018-2020).
  • Served as a Lecturer in Pharmaceutical Chemistry (2020-2023).
  • Became a Senior Lecturer in Pharmaceutical Chemistry (2023-present).

About My Work

  • Specialises in Pharmaceutical Chemistry, Organic Chemistry, Medicinal Chemistry, Drug Discovery, and Molecular Modelling.
  • Develops computer-aided techniques and organic chemistry methods to identify new small molecules that target biological targets. This includes activities against cancer, viruses, or other targets.

How Will We Learn Together?

  • The module uses a flipped classroom model.
  • Students review pre-class videos on Canvas.
  • Students take formative quizzes on Canvas.
  • Students participate in live sessions (F2F or Zoom) for discussions, questions, and answers.
  • Students actively participate and prepare for final exams.

What Will We Learn?

  • Basic Concepts: Acid/base, pH, solubility, lipophilicity, thermodynamics, reaction kinetics, and practical chemistry.
  • Advanced Concepts: Carbon compounds, functional groups, spectroscopy techniques (spectrometry), enzymes, receptors, nucleic acids, other targets, basic drug design, drug-like properties, and hit and lead.
  • Organic Chemistry: Focus on organic chemistry concepts relevant to drugs and medicinal chemistry.
  • Drugs and Drug Targets: Explore the nature of drugs and their interactions with the body's target molecules.

Why Do We Need to Study Chemistry?

  • A patient left an aspirin bottle open in a bathroom cabinet.
  • Pharmacist A checked the leaflet, which advised keeping the bottle tightly closed and below 25°C, and instructed the patient to discard the medicine.
  • Pharmacist B explained the reason aspirin's instability in the bathroom could lessen its effectiveness.
  • Patients reacted differently, one distrustful of the advice, and the other accepting it.
  • Illustrates the importance of understanding chemical properties like moisture sensitivity and temperature stability for effective drug use.

Learning Outcomes

  • Describe the major components of medicines.
  • Discuss the steps involved in the development of a medicine.
  • Describe the constituents of medicines.
  • Understand the key steps in drug discovery and development.

Do I Know the Answer?

  • Questions the student should answer relate to HIT COMPOUND definition, PHASE I CLINICAL PHASE definition, and the correct sequence for DRUG DEVELOPMENT PROCESS.

Drug or Medicine?

  • A distinction is made between drugs and medicines, with drugs as chemical substances used for diagnosing, treating, or preventing diseases, while medicines can be considered a delivery system for drugs.
  • Examples of drugs include 2-acetoxybenzoic acid, Agumentin, Ketoprofen, Ibuprofen 400mg, and Ampicillin.

Medicines Contain...

  • Excipients: These are substances in medicines that are not pharmacologically active but are crucial for medication delivery; these are often chemically inert. These include fillers, binders, disintegrants, glidants, colouring agents, antiadherants, lubricants, coatings, preservatives, etc.

How Long Does It Take?

  • Drug development to market typically takes 5 to 20 years.

Drug Development Process

  • The process is described through stages: in vitro and in vivo testing, human testing, data review, surveillance, basic/early research, discovery/development, phase I to phase III clinical development, pre-clinical, review, and finally post market monitoring to maintain and monitor safety.

Discovery & Development

  • In the past: active ingredients often came from traditional medicines, by chance.
  • Now, active compounds are targeted: screening hits, medicinal chemistry, etc.
  • Steps describe how new drug targets are found, validated, structure activity relationships (SAR) are established etc.

Preclinical Research

  • Lead compounds are tested on non-human subjects to assess safety, toxicity, and pharmacokinetics.
  • In vitro models evaluate drug activity and off-target effects.
  • In vivo tests involve various animal models studying bioavailability, dosage etc.
  • Best dosage is calculated for safety and proper administration routes.
  • Appropriate formulation is designed to maximize drug delivery without harming healthy tissues.

Clinical Development

  • Clinical trials include healthy and patient volunteers to evaluate safety, efficacy, and optimal dosage.
  • Phases I to III describe progress involving dosage ranges, safety checks, and efficacy testing.
  • Issues during testing (toxicity, lack of efficacy, drug interactions) can cause trials to be stopped.

Review (Licensing approval)

  • Regulators such as FDA, EMA, etc., review clinical trial data and approve or reject a new drug based on approval criteria and evidence.
  • Failure rates are high.

Post-Marketing Monitoring (Phase IV)

  • Post-approval monitoring addresses ongoing safety issues and potential risks.
  • Manufacturers are obligated to continuously review the long-term impact on the human body.
  • Safety issues discovered cause drug recalls to prevent adverse consequences.

In Summary...

  • The steps in discovering a new drug, testing at different phases, and the required monitoring of the drug after approval are explained.
  • The difference between a drug and a medicine is described.
  • The importance of chemistry in pharmacy/drugs is highlighted.

Now I know the answer...

  • Answers the commonly asked questions about hit compounds (a molecule that shows desired activity), phase I clinical trials (involving roughly 100 healthy volunteers to test safety and pharmacokinetics), and the accurate sequence of drug development stages.

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