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Novel Prolonged-release Polymeric Microparticles For Relief Of Intractable Cancer-related Pain
Funder
National Health and Medical Research Council
Funding Amount
$796,950.00
Summary
For the 10-30% of patients with advanced cancer who experience intractable pain despite administration of large doses of morphine-like drugs by mouth or injection, more invasive dosing routes may be needed. This project will utilise innovative polymer chemistry to develop bioerodable prolonged-release polymer microparticles to deliver pain-killers into the spinal fluid near to the cells that mediate their actions, with a view to producing prolonged periods of analgesia in these patients.
Increasing The Capacity Of Community Pharmacy For Screening, Brief Intervention And Referral For Treatment Of Pharmaceutical Opioid Use Disorders
Funder
National Health and Medical Research Council
Funding Amount
$177,197.00
Summary
Pharmaceutical opioid dependence is a growing problem. There are effective treatments available, yet few people who need treatment receive it. Currently, pharmacists receive little training on substance use disorders, yet are in contact with almost every person likely to develop problems with pharmaceutical opioids. This project will take an innovative approach to involve pharmacists in identifying those developing problems with pharmaceutical opioids and referring them to treatment.
Opioid Actions On Sensory Neuron Excitability In Vitro
Funder
National Health and Medical Research Council
Funding Amount
$241,018.00
Summary
Morphine and related drugs are very widely used for pain relief, although the way they affect the pain-sensitive cells in the body is not well understood. Use of morphine for extended periods of time often makes morphine less effective for pain relief, which makes it necessary to increase the dose of morphine given. This leads to an increase in the unwanted side effects of morphine, and can eventually lead to morphine becoming ineffective in controlling pain. This study is designed to examine ho ....Morphine and related drugs are very widely used for pain relief, although the way they affect the pain-sensitive cells in the body is not well understood. Use of morphine for extended periods of time often makes morphine less effective for pain relief, which makes it necessary to increase the dose of morphine given. This leads to an increase in the unwanted side effects of morphine, and can eventually lead to morphine becoming ineffective in controlling pain. This study is designed to examine how morphine affects pain-sensitive cells, and to determine how continued use of morphine changes the way pain-sensitive cells respond to morphine. We hope that by understanding how morphine works on pain-sensitive cells, we can understand why it does not work so well after continued use. This information should enable us to design better forms of pain relief than we have now.Read moreRead less
Pharmaceutical Opioid Analgesic (POA) Dependence And Treatment Responses
Funder
National Health and Medical Research Council
Funding Amount
$390,628.00
Summary
Dependence on opioid based pain medication is a rapidly growing health concern in Australia. In the United States more people die each year from misusing pain medication than from using illicit drugs like heroin. Dr Suzanne Nielsen, an emerging expert in pharmaceutical misuse, will undertake essential research to understand the dependence to opioid pain medication in Australia and to develop appropriate treatment responses.
Electroacupuncture On Opioid Consumption By Patients With Chronic Musculoskeletal Pain: A Randomised Controlled Trial
Funder
National Health and Medical Research Council
Funding Amount
$368,138.00
Summary
Chronic musculoskeletal pain significantly impacts on productivity and quality of life and represents one-tenth of health expenditure. Opioids are increasingly prescribed to control this type of pain, although the long-term usage is inadequate and associated with significant adverse events. Our pilot study has shown that electroacupuncture (EA) is potentially beneficial for reducing OM. This study is to determine whether or not EA reduces OM consumption and associated adverse events.
Mechanisms Of Opioid Receptor Desensitisation In Single Neurons
Funder
National Health and Medical Research Council
Funding Amount
$301,320.00
Summary
Opioid drugs including morphine and codeine are the most effective analgesics known but their utility is limited by problems of tolerance (which is the need for increasing doses of drug to achieve the same effect), physical dependence characterised by a debilitating withdrawal syndrome on cessation of use, and addiction or compulsive drug seeking and use. Better understanding of the mechanisms underlying these adverse processes could lead to the development of more acceptable pain relieving agen ....Opioid drugs including morphine and codeine are the most effective analgesics known but their utility is limited by problems of tolerance (which is the need for increasing doses of drug to achieve the same effect), physical dependence characterised by a debilitating withdrawal syndrome on cessation of use, and addiction or compulsive drug seeking and use. Better understanding of the mechanisms underlying these adverse processes could lead to the development of more acceptable pain relieving agents. This project will increase understanding of the initial molecular events occurring in nerve cells that are believed to underlie the development of tolerance and physical dependence on opioid drugs. These studies will focus on sensory nerve cells isolated and cultured from animals, which are one of the major targets of pain relieving drugs. Understanding of these processes will lead to development of better strategies to avoid development of tolerance and perhaps physical dependence. They will also identify on a molecular level the mechanisms that determine why one opioid drug may produce more tolerance than another. This knowledge may lead to the development of pain relieving drugs that do not so readily lose their effectiveness in the management of chronic pain.Read moreRead less
Opioid Actions On Identified Sensory Neurons In Vitro
Funder
National Health and Medical Research Council
Funding Amount
$371,850.00
Summary
Opioids (in particular morphine) are the gold standard drugs for the relief of most types of moderate to severe pain. Despite the effectiveness of opioids and other analgesics, many people still suffer unrelieved pain. There are 2 main reasons for this. Firstly, there are some types of pain that are refractory to currently used analgesics from the outset, and secondly, chronic conditions may require escalating doses of analgesics for adequate pain relief, and these does may increase until side e ....Opioids (in particular morphine) are the gold standard drugs for the relief of most types of moderate to severe pain. Despite the effectiveness of opioids and other analgesics, many people still suffer unrelieved pain. There are 2 main reasons for this. Firstly, there are some types of pain that are refractory to currently used analgesics from the outset, and secondly, chronic conditions may require escalating doses of analgesics for adequate pain relief, and these does may increase until side effects become intolerable. My studies will provide insight into the reasons that underlie the differential effectiveness of opioids in acute pain conditions, as well as the reasons why opioids lose their effectiveness over time. These studies will also identify molecular targets that may be important for developing analgesics for specific pain conditions. Because the head is the source of many familiar painful conditions, including tooth pain, migraine and temporomandibular disorders, I will be using neurons from the trigeminal ganglion, the part of the nervous system which supplies the sensory innervation to the structures involved in these pain states. By using mice as experimental animals, I will be able to investigate the contribution of neurons that innervate specific parts of the head to these pain states, and study how chronic morphine treatment affects the behavior of these cells. I hope that these studies will provide a basis for designing strategies that improve the effectiveness of existing analgesics, and perhaps lead to the identification of new, better pain relievers.Read moreRead less
‘Chemobrain’: Neuroimmunological Consequences Of Chemotherapy-induced Mucositis And Opioid Palliation In Development Of The Condition
Funder
National Health and Medical Research Council
Funding Amount
$318,768.00
Summary
Approximately 46% of cancer patients receiving chemotherapy will experience cognitive impairment. The development of this condition may be linked to another common gut side-effect of chemotherapy- mucositis. The treatment of mucositis pain by potent painkillers called opioids may also increase the risk of cognitive change. This project will determine the nervous system changes occurring in mucositis to identify targets for drug intervention to prevent development of cognitive decline.
Closing The Gap: Implementing Effective Treatments To Improve Post-operative Nausea And Vomiting
Funder
National Health and Medical Research Council
Funding Amount
$175,303.00
Summary
Nausea and vomiting are common after surgery, concern 80% people undergoing surgery, and are managed by drugs with unwanted side effects. High quality evidence supports acupuncture being a safe and effective non-drug therapy for this complaint. This study will examine if and how acupuncture can be delivered by doctors and nurses around operation time. In future, people may have the choice of using acupuncture or drugs, or both, for preventing or treating nausea and vomiting after surgery.
Differentiation Of Multiple Phenotypes Of Rostral Ventromedial Medulla Neurons And Their Role In Pain
Funder
National Health and Medical Research Council
Funding Amount
$285,990.00
Summary
Chronic pain, defined as pain experienced in three out of a six month pre-interview period affects 17% of males and 20% of females in the Australian population. Opioid drugs such as morphine and codeine are the most effective drugs used to treat moderate to severe pain. However, the utility of these drugs is hampered by the development of a blunted response with repeated use. Furthermore, some clinically important pain states, particularly those caused by nerve injury, do not respond well to opi ....Chronic pain, defined as pain experienced in three out of a six month pre-interview period affects 17% of males and 20% of females in the Australian population. Opioid drugs such as morphine and codeine are the most effective drugs used to treat moderate to severe pain. However, the utility of these drugs is hampered by the development of a blunted response with repeated use. Furthermore, some clinically important pain states, particularly those caused by nerve injury, do not respond well to opioid drugs. Recent basic neurosceince research has identified groups of nerve cells deep within the brain that control sensitivity to pain as pain signals enter the spinal cord. Unfortunately in the presence of some chronic pain conditions, or chronic use of high doses of opioid drugs, these neurons undergo functional changes or adaptations that distort and increase the severity of pain sensation in a more or less permanent manner. This project uses electrical and chemical techniques to identify the basic physiology and pharmacology of single nerve cells in this brain region, so that their normal functions can be properly understood. We will then identify the cellular and molecular adaptations that occur in the nerve cells in animal models of chronic nerve injury and chronic morphine treatment to identify the nature of adaptations responsible for their aberrant function. We will then be in a position to rationally identify novel drug targets that can normalise the function of these nerve cells. This knowledge will provide potential targets for development of novel therapeutics to manage chronic pain.Read moreRead less