Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort:
Hottest Latest Alphabetical (A-Z) Alphabetical (Z-A)
Type:
All Topic Review Biography
Topic Review
Parthenin
Parthenin, a sesquiterpene lactone of pseudoguaianolide type, is the representative secondary metabolite of the tropical weed Parthenium hysterophorus (Asteraceae). It accounts for a multitude of biological activities, including toxicity, allergenicity, allelopathy, and pharmacological aspects of the plant. Thus far, parthenin and its derivatives have been tested for chemotherapeutic abilities, medicinal properties, and herbicidal/pesticidal activities. However, due to the lack of toxicity-bioactivity relationship studies, the versatile properties of parthenin are relatively less utilised. The possibility of exploiting parthenin in different scientific fields (e.g., chemistry, medicine, and agriculture) makes it a subject of analytical discussion. It is important to highlight that the toxic nature of parthenin can be overcome by thoroughly understanding its structural basis, designing suitable derivatives, and deciding the appropriate doses.
  • 812
  • 09 Oct 2021
Topic Review
Paroxetine Molecular Mechanisms of Action
In the 21st century and especially during a pandemic, the diagnosis and treatment of depression is an essential part of the daily practice of many family doctors. It mainly affects patients in the age category 15–44 years, regardless of gender. Anxiety disorders are often diagnosed in children and adolescents. Social phobias can account for up to 13% of these diagnoses. Social anxiety manifests itself in fear of negative social assessment and humiliation, which disrupts the quality of social functioning. Treatment of the above-mentioned disorders is based on psychotherapy and phar-macotherapy. Serious side effects or mortality from antidepressant drug overdose are currently rare. Recent studies indicate that paroxetine (ATC code: N06AB), belonging to the selective sero-tonin reuptake inhibitors, has promising therapeutic effects and is used off-label in children and adolescents.
  • 629
  • 26 Feb 2021
Topic Review
Paracetamol
Paracetamol (acetaminophen) is one of the most commonly prescribed drugs worldwide. Synthetized over 150 years ago, paracetamol is highly efficient as analgesic and antipyretic and is on the list of the World Health Organization’s essential medicines. Paracetamol is also a hypothermic agent.
  • 700
  • 28 Apr 2022
Topic Review
Papaverine and Its Mechanism of Action
Papaverine has been proven to be a high-value opioid alkaloid in the field of therapeutics either in solitude or in combination with other metabolites/molecules. Pharmacological research has revealed that papaverine demonstrates a variety of biological activities, including activity against erectile dysfunction, postoperative vasospasms, and pulmonary vasoconstriction, as well as antiviral, cardioprotective, anti-inflammatory, anticancer, neuroprotective, and gestational actions.
  • 1.1K
  • 07 Apr 2023
Topic Review
Paclitaxel in Bioinspired Nanosystems for Targeted Delivery
Taxanes are a class of diterpenes originally isolated from plants of the yew family (Taxaceae). An intriguing alternative to natural vesicles is represented by bioinspired extracellular vesicle (EV)-like nanoparticles (NPs), for example exosomes (EXOs) obtained from a serial extrusion process of a parent cell membrane suspension through decreasing pore size membranes or from hybridization of EXOs and liposome membranes.
  • 314
  • 18 May 2023
Topic Review
P-Glycoprotein Inhibitors
P-gp inhibitors are compounds that block or bypass P-gp efflux. The concurrent administration of P-gp inhibitors with P-gp substrates can prevent the expulsion of these substrates and increase their therapeutic effects. Researchers have identified, studied, and evaluated various P-gp inhibitors, including small molecules, natural products, and pharmaceutically inert excipients.
  • 940
  • 18 Aug 2021
Topic Review
Oxycodone Efficacy in Pain Management
Oxycodone is a widely used opioid for the management of chronic pain. Analgesic effects observed following the administration of oxycodone are mediated mostly by agonistic effects on the μ-opioid receptor. Wide inter-subject variability observed in oxycodone efficacy could be explained by polymorphisms in the gene coding for the μ-opioid receptor (OPRM1).
  • 524
  • 18 Oct 2021
Topic Review
Oximes
Oximes have been studied for decades because of their significant roles as acetylcholinesterase reactivators. Over the last twenty years, a large number of oximes have been reported with useful pharmaceutical properties, including compounds with antibacterial, anticancer, anti-arthritis, and anti-stroke activities. Many oximes are kinase inhibitors and have been shown to inhibit over 40 different kinases, including AMP-activated protein kinase (AMPK), phosphatidylinositol 3-kinase (PI3K), cyclin-dependent kinase (CDK), serine/threonine kinases glycogen synthase kinase 3 α/β (GSK-3α/β), Aurora A, B-Raf, Chk1, death-associated protein-kinase-related 2 (DRAK2), phosphorylase kinase (PhK), serum and glucocorticoid-regulated kinase (SGK), Janus tyrosine kinase (JAK), and multiple receptor and non-receptor tyrosine kinases. Some oximes are inhibitors of lipoxygenase 5, human neutrophil elastase, and proteinase 3. The oxime group contains two H-bond acceptors (nitrogen and oxygen atoms) and one H-bond donor (OH group), versus only one H-bond acceptor present in carbonyl groups. This feature, together with the high polarity of oxime groups, may lead to a significantly different mode of interaction with receptor binding sites compared to corresponding carbonyl compounds, despite small changes in the total size and shape of the compound. In addition, oximes can generate nitric oxide.
  • 874
  • 03 Jun 2021
Topic Review
Oxidative stress, brain and chemotherapy
Preclinical evidence shows that several chemotherapeutic drugs widely used in cancer patients such as anthracyclines, taxanes, and platinum derivatives induced oxidative stress noted in the blood and brain, which may affect both neurons and glia cells. In animal models, the oxidative stress induced by chemotherapeutic drugs is accompanied by cognitive deficits. Administration of several antioxidants decreased or prevented these effects and helped pinpoint the potential role of antioxidants as drugs that may be able to reduce both oxidative stress and cognitive dysfunction caused by chemotherapy.
  • 457
  • 29 Mar 2022
Topic Review
Oxidative Stress and Reproductive Function
       There are many factors that contribute to the decline of the male reproductive system. In particular, aging is associated with an increase production of reactive oxygen species (ROS) and a decrease in the antioxidant defense system, leading to oxidative stress, which can be harmful to male germ cells. Although sperm quality is thought to decrease with age, studies in humans have not found a definite negative correlation between aging and sperm quality. Further, advanced paternal age (APA), commonly defined as men over the age of 40 years, is associated with an increase in sperm DNA damage, male infertility and negative progeny outcomes. Although limited, studies have found that there may be benefits to antioxidant supplementation in order to reverse the effects of aging and oxidative stress in males. More studies need to be conducted. 
  • 567
  • 26 Oct 2020
  • Page
  • of
  • 106
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Encyclopedia of Fungi
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Video Production Service
Feedback