piperine and Neurodegenerative-Diseases

Parkinson's disease (PD) is the most common progressive neurodegenerative disease known to impart bradykinesia leading to diverse metabolic complications. Currently, scarcity of effective drug candidates against this long-term devastating disorder poses a big therapeutic challenge. Here, we have synthesized biocompatible, polycrystalline, and uniform piperine-coated gold nanoparticles (AuNPs

Topics: Alkaloids; Animals; Benzodioxoles; Drosophila melanogaster; Gold; Metal Nanoparticles; Neurodegenerative Diseases; Oxidative Stress; Paraquat; Piperidines; Polyunsaturated Alkamides

Parkinson's disease (PD) is a multifactorial neurological disorder caused by selective dopaminergic neuronal loss. Quercetin (QC) in combination with piperine (bioenhancer) acts as potential antioxidant, anti-inflammatory and neuroprotective against 6-OHDA rat model of PD. Rats were injected 6-OHDA (8μg/2μl, saline) unilaterally, intranigrally once into right SNpc. Pre-treatment with QC (25 and 50mg/kg, p.o.) alone and combination of QC (25mg/kg, p.o.) with piperine (2.5mg/kg, p.o.) were given for 14days starting from 8th day of 6-OHDA infusion. Post lesions were confirmed by rotational behavior with amphetamine (2.5mg/kg, i.p.) and motor coordination was assessed by narrow beam walk, open field and rotarod apparatus on the weekly basis. On 22nd day, animals were sacrificed and striatum homogenates were used for biochemical (LPO, GSH, Nitrite), neuroinflammatory (TNF-α, IL-1 β and IL-6) and neurotransmitter (dopamine, norepinephrine, serotonin, GABA, glutamate) analysis. Rats pre-treated with QC alone and in combination with piperine have significantly attenuated the 6-OHDA induced rotational behavior and motor deficits. Further, these drugs have significantly improved antioxidant potential, decreased striatal proinflammatory cytokines level as well as restored neurotransmitters level. The neuroprotective enhancement of QC along with piperine is attributed through antioxidant, anti-inflammatory and preventing neurotransmitter alteration mechanisms.

Topics: Alkaloids; Animals; Benzodioxoles; Brain Chemistry; Disease Models, Animal; Dose-Response Relationship, Drug; Drug Therapy, Combination; Glutathione; Hand Strength; Locomotion; Male; Neurodegenerative Diseases; Neuroprotective Agents; Neurotransmitter Agents; Nitrites; Oxidopamine; Piperidines; Polyunsaturated Alkamides; Psychomotor Performance; Quercetin; Rats; Rats, Wistar; Sympatholytics; Thiobarbituric Acid Reactive Substances; Time Factors

The aim of the present study was to investigate the protective effects of curcumin alone and in combination with piperine against lipopolysaccharide (LPS)-induced neurobehavioral and neurochemical deficits in the mice hippocampus. Mice were treated with curcumin (100, 200, and 400 mg/kg, p.o.) and piperine (20 mg/kg, p.o.) for 7 days followed by LPS (0.83 mg/kg, i.p.) administration. Animals exhibited anxiety and depressive-like phenotype after 3 and 24 h of LPS exposure, respectively. LPS administration increased the oxido-nitrosative stress as evident by elevated levels of malondialdehyde, nitrite, and depletion of glutathione level in the hippocampus. Furthermore, we found raised level of pro-inflammatory cytokines (IL-1β and TNF-α) in the hippocampus of LPS-treated mice. Pretreatment with curcumin alleviated LPS-induced neurobehavioral and neurochemical deficits. Furthermore, co-administration of curcumin with piperine significantly potentiated the neuroprotective effect of curcumin. These results demonstrate that piperine enhanced the neuroprotective effect of curcumin against LPS-induced neurobehavioral and neurochemical deficits.

Topics: Alkaloids; Animals; Benzodioxoles; Curcumin; Drug Synergism; Hippocampus; Lipopolysaccharides; Mice; Neurodegenerative Diseases; Neuroprotective Agents; Piperidines; Polyunsaturated Alkamides