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Topic Review
Oral Lichen Planus
Oral lichen planus (OLP) is an autoimmune and chronic inflammatory disease. The etiology of OLP is still unknown, but it is believed to be associated with a cell-mediated immune dysregulation.
  • 727
  • 11 Jan 2021
Topic Review
Nutrition and Healthy Aging
Nutritinal well-being is a fundamental aspect for the health, autonomy and therefore the quality of life of all people, but expecially of the elderly. Old patients are particularly at risk of malnutrition, due to the multiple etiopathogenetic factors which can lead to a reduction in intake of nutrients, a progressive loss of functinal autonomy with dependence on food, psychological problems related to economic or social isolation, e.g. linked to poverty or loneliness. Gasteointestinal changes in aging involve motor function and therefore intestinal transit, mechanical breackdown of food and his chemical digestion. These alterations progressively lead to the reducede ability to supply the body with adequate quantities of nutrients, with the consequent  development of malnutrition.
  • 727
  • 06 Dec 2021
Topic Review
Substance Dependence
Substance dependence, also known as drug dependence, is a biopsychological situation where-by an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance, because of an adaptive state that has developed with the individual from psychoactive substance consumption, which results in the experience of withdrawal, which necessitates the re-consumption of the drug. A drug addiction, a distinct concept from substance dependence, is defined as compulsive, out-of-control drug use, despite negative consequences. An addictive drug is a drug which is both rewarding and reinforcing. ΔFosB, a gene transcription factor, is now known to be a critical component and common factor in the development of virtually all forms of behavioral and drug addictions, but not dependence. The International Classification of Diseases classifies substance dependence as a mental and behavioural disorder. Within the framework of the 4th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV), substance dependence is redefined as a drug addiction, and can be diagnosed without the occurrence of a withdrawal syndrome. It was described accordingly: "When an individual persists in use of alcohol or other drugs despite problems related to use of the substance, substance dependence may be diagnosed. Compulsive and repetitive use may result in tolerance to the effect of the drug and withdrawal symptoms when use is reduced or stopped. This, along with Substance Abuse are considered Substance Use Disorders." In the DSM-5 (released in 2013), substance abuse and substance dependence have been merged into the category of substance use disorders and they no longer exist as individual diagnoses.
  • 727
  • 25 Oct 2022
Topic Review
Kynurenic Acid
Kynurenic acid (KYNA), a metabolite of tryptophan, is an endogenous substance produced intracellularly by various human cells. In addition, KYNA can be synthesized by the gut microbiome and delivered in food. 
  • 726
  • 24 Oct 2022
Topic Review
Augmented Reality in Surgery
Augmented reality (AR) is an innovative system that enhances the real world by superimposing virtual objects on reality. The application of AR in image-guided surgery (IGS) can be an increasingly important opportunity for the treatment of patients. In particular, AR allows one to see 3D images projected directly onto patients thanks to the use of special displays.
  • 725
  • 09 Aug 2022
Topic Review
Review of Ionic Liquids Toxicity
Ionic liquids (more accurately room-temperature ionic liquids (RTILs)) can be defined as materials composed of organic or inorganic cations (like imidazolium or pyridinium) and anions (e.g., nitrate, acetate, tetrafluoroborate, dicyanamide, bis(trifluoromethylsulfonyl)imide and lactate) that are liquid at or below 100 °C. The number of possible combinations of a cation and anion is estimated to reach 106, making it theoretically possible to synthesize an IL targeted for a specific application or property.
  • 727
  • 29 Jun 2021
Topic Review
Fundamental Principles in Electromotive Enhanced Drug Administration
Local-regional administration of cytotoxic drugs is an important adjunct to systemic chemotherapy amongst cancer patients. It allows for targeted delivery of agents at high concentration to target sites while minimizing systemic side effects. Despite the pharmacokinetic advantages of the local–regional approach, drug transport into tumor nodules remains limited due to the biophysical properties of these tissues. Electromotive enhanced drug administration (EMDA) represents a potential solution to overcome challenges in local drug transport by applying electric currents. Through electrokinetic phenomena of electromigration, electroosmosis and electroporation, electric currents have been shown to improve drug penetration and distribution in a wide variety of clinical applications.
  • 727
  • 26 Oct 2022
Topic Review
S1P in Multiple Sclerosis
Sphingosine 1-phosphate (S1P) is a signaling molecule with complex biological functions that are exerted through the activation of sphingosine 1-phosphate receptors 1–5 (S1PR1–5). S1PR expression is necessary for cell proliferation, angiogenesis, neurogenesis and, importantly, for the egress of lymphocytes from secondary lymphoid organs. Since the inflammatory process is a key element of immune-mediated diseases, including multiple sclerosis (MS), S1PR modulators are currently used to ameliorate systemic immune responses. 
  • 726
  • 01 Dec 2021
Topic Review
Vitamins and Neurodegenerative Disease
Acquiring the recommended daily allowance of vitamins is crucial for maintaining homeostatic balance in humans and other animals. A deficiency in or dysregulation of vitamins adversely affects the neuronal metabolism, which may lead to neurodegenerative diseases. In this article, we discuss how novel vitamin-based approaches aid in attenuating abnormal neuronal functioning in neurodegeneration-based brain diseases such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, Amyotrophic lateral sclerosis, and Prion disease. Vitamins show their therapeutic activity in Parkinson’s disease by antioxidative and anti-inflammatory activity. In addition, different water- and lipid-soluble vitamins have also prevented amyloid beta and tau pathology. On the other hand, some results also show no correlation between vitamin action and the prevention of neurodegenerative diseases. Some vitamins also exhibit toxic activity too. 
  • 727
  • 29 Sep 2021
Topic Review
Current Advanced on Hematopoietic Stem Cell
Blood is a connective tissue made up of approximately 34% cells and 66% plasma, transporting nutrients, gases and molecules in general to the whole body. Hematopoiesis is the main function of bone marrow. Human hematopoietic stem and progenitor cells reside in the bone marrow microenvironment, making it a hotspot for the development of hematopoietic diseases. Numerous alterations that correspond to disease progression have been identified in the bone marrow stem cell niche. Complex interactions between the bone marrow microenvironment and hematopoietic stem cells determine the balance between the proliferation, differentiation and homeostasis of the stem cell compartment. Changes in this tightly regulated network can provoke malignant transformation. However, our understanding of human hematopoiesis and the associated niche biology remains limited due to accessibility to human material and the limits of in vitro culture models. Traditional culture systems for human hematopoietic studies lack microenvironment niches, spatial marrow gradients, and dense cellularity, rendering them incapable of effectively translating marrow physiology ex vivo.
  • 726
  • 15 Mar 2022
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