Acyclovir inhibition of IDO to decrease Tregs as a glioblastoma treatment adjunct.

16:18 EDT 3rd July 2015 | BioPortfolio

Summary of "Acyclovir inhibition of IDO to decrease Tregs as a glioblastoma treatment adjunct."


ABSTRACT:
Regulatory T cells, Tregs, are a subset of lymphocytes that have immunosuppressive attributes. They are elevated in blood of glioblastoma patients and within this tumor's tissue itself. Indoleamine 2,3-dioxygenase, IDO, converts tryptophan to kynurenine. IDO activity enhances Treg formation by pathways that are unknown. Experimentally, inhibition of IDO decreases Treg function and number in rodents. The common anti-viral agent acyclovir inhibits IDO. Acyclovir may thereby decrease Treg function in glioblastoma. If it can be confirmed that Treg counts are elevated in glioblastoma patients' tumor tissue, and if we can document acyclovir's lowering of tissue Treg counts by a small trial of acyclovir in pre-operative glioblastoma patients, a trial of acyclovir effect on survival should be done given the current poor prognosis of glioblastoma and the well-established safety and low side effect burden of acyclovir.

Affiliation

Journal Details

This article was published in the following journal.

Name: Journal of neuroinflammation
ISSN: 1742-2094
Pages: 44

Links

PubMed Articles [25045 Associated PubMed Articles listed on BioPortfolio]

Glioblastoma treatment patterns, survival, and healthcare resource use in real-world clinical practice in the USA.

Glioblastoma (GB) treatment remains challenging because of recurrence and poorly defined treatment options after first-line therapy. To better understand real-world application of treatment paradigms ...

PARP Inhibition Restores Extrinsic Apoptotic Sensitivity in Glioblastoma.

Resistance to apoptosis is a paramount issue in the treatment of Glioblastoma (GBM). We show that targeting PARP by the small molecule inhibitors, Olaparib (AZD-2281) or PJ34, reduces proliferation an...

Ball-milled solid dispersions of BCS Class IV drugs: Impact on the dissolution rate and intestinal permeability of acyclovir.

Acyclovir, an analog of 2'-deoxyguanosine, is one of the most important drugs in the current approved antiviral treatment. However, it's biopharmaceutical properties, contribute to acyclovir's poor or...

Acyclovir Therapy Reduces the CD4+ T Cell Response against the Immunodominant pp65 Protein from Cytomegalovirus in Immune Competent Individuals.

Cytomegalovirus (CMV) infects the majority of the global population and leads to the development of a strong virus-specific immune response. The CMV-specific CD4+ and CD8+ T cell immune response can c...

Inhibition of nestin suppresses stem cell phenotype of glioblastomas through the alteration of post-translational modification of heat shock protein HSPA8/HSC71.

Nestin, a class VI intermediate filament, was first described as a neuronal stem/progenitor cell marker. We previously reported that knockdown of nestin expression in human glioblastoma cells suppress...

Clinical Trials [2343 Associated Clinical Trials listed on BioPortfolio]

Study of ME-609 and Acyclovir for Treatment of Herpes Simplex Labialis in Immunocompromised Patients

The purpose of this study is to evaluate the episode duration of a herpes labialis recurrence in immunocompromised patients treated with ME-609 or Acyclovir.

Regulatory T Cells in COPD

Lymphoid follicles, consisting of T-and B cells, are involved in the chronic inflammatory response in COPD. Foxp3 positive regulatory T cells (Tregs) are present in these follicles and may...

Treatment and Suppression of Hairy Leukoplakia in ARC Patients With Oral Acyclovir (ACV)

To evaluate the efficacy of oral acyclovir for the treatment and suppression of Epstein-Barr virus (EBV) related hairy leukoplakia (HL). To determine the long-term safety of acyclovir in t...

Donor Alloantigen Reactive Tregs (darTregs) for Calcineurin Inhibitor (CNI) Reduction

This research study is for liver transplant recipients and their respective living donors. The purpose of this study is: 1. To see if it is safe for liver recipients to receive one dos...

Comparison of Brovavir Versus Acyclovir in the Treatment of Herpes in HIV-Infected Patients

To compare the efficacy of oral sorivudine (brovavir) and oral acyclovir for the treatment of localized herpes zoster in HIV-infected patients. HIV-infected patients are at high risk for ...

Medical and Biotech [MESH] Definitions

One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)

Benign and malignant central nervous system neoplasms derived from glial cells (i.e., astrocytes, oligodendrocytes, and ependymocytes). Astrocytes may give rise to astrocytomas (ASTROCYTOMA) or glioblastoma multiforme (see GLIOBLASTOMA). Oligodendrocytes give rise to oligodendrogliomas (OLIGODENDROGLIOMA) and ependymocytes may undergo transformation to become EPENDYMOMA; CHOROID PLEXUS NEOPLASMS; or colloid cysts of the third ventricle. (From Escourolle et al., Manual of Basic Neuropathology, 2nd ed, p21)

The decrease in neuronal activity (related to a decrease in metabolic demand) extending from the site of cortical stimulation. It is believed to be responsible for the decrease in cerebral blood flow that accompanies the aura of MIGRAINE WITH AURA. (Campbell's Psychiatric Dictionary, 8th ed.)

A therapeutic treatment typically involving INTRA-ARTICULAR INJECTIONS of HYALURONIC ACID and related compounds. The procedure is commonly used in the treatment of OSTEOARTHRITIS with the therapeutic goal to restore the viscoelasticity of SYNOVIAL FLUID, decrease pain, improve mobility and restore the natural protective functions of hyaluronan in the joint.

A quaternary ammonium anticholinergic agent with peripheral side effects similar to those of ATROPINE. It is used as an adjunct in the treatment of gastric and duodenal ulcer, and to relieve visceral spasms. The drug has also been used in the form of eye drops for mydriatic effect.


Advertisement
 

Relevant Topic

Blood
Latest News Clinical Trials Research Drugs Reports Corporate
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells (in animals) – such as nutrients and oxygen – and transports waste products away from those same cells.  In vertebrates, it is composed of blo...

Advertisement
 

Searches Linking to this Article