Showing posts with label anti-apoptotic. Show all posts
Showing posts with label anti-apoptotic. Show all posts

Bee Venom May Help Treat Parkinson's Disease

Clinical trials are currently ongoing in Parisian Hospitals using Bee Venom in the treatment of Parkinson's Disease... 

Bee Venom Protects SH-SY5Y Human Neuroblastoma Cells from 1-Methyl-4-Phenylpyridinium-Induced Apoptotic Cell Death
Brain Research, 2011 Oct 6

Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by progressive selective loss of dopaminergic neurons in the substantia nigra. Recently, bee venom was reported to protect dopaminergic neurons in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine induced mice PD model, however, the underlying mechanism is not fully understood.

The objective of the present study is to investigate the neuroprotective mechanism of bee venom against Parkinsonian toxin, 1-methyl-4-phenylpyridine (MPP(+)), in SH-SY5Y human neuroblastoma cells.

Our results revealed that bee venom pretreatment (1-100ng/ml) increased the cell viability and decreased apoptosis assessed by DNA fragmentation and caspase-3 activity assays in MPP(+)-induced cytotoxicity in SH-SY5Y cells. Bee venom increased the anti-apoptotic Bcl-2 expression and decreased the pro-apoptotic Bax, cleaved PARP expressions.

In addition, bee venom prevented the MPP(+)-induced suppression of Akt phosphorylation, and the neuroprotective effect of bee venom against MPP(+)-induced cytotoxicity was inhibited by a phosphatidylinositol 3-kinase (PI3K) inhibitor, LY294002.

These results suggest that the anti-apoptotic effect of bee venom is mediated by the cell survival signaling, the PI3K/Akt pathway. These results provide new evidence for elucidating the mechanism of neuroprotection of bee venom against PD.

Propolis Extracts May Allow Inexpensive Cancer Treatment

a very concise peer-reviewed article, confirming ONCE AGAIN, that propolis has very real potential to save lives. In the meantime, take your propolis regularly!!!

Cytotoxic Constituents of Propolis Inducing Anticancer Effects: A Review
J Pharm Pharmacol, 2011 Nov;63(11):1378-86

Objectives:
Propolis is a honeybee product used extensively in traditional medicine for its antioxidant, anti-inflammatory, immunomodulatory and anticancer effects. Propolis exhibits a broad spectrum of biological activities because it is a complex mixture of natural substances. In this review, the antitumour effects of propolis extracts and its constituents (e.g. flavonoids, terpenes and caffeic acid phenethyl ester) are discussed.

Key findings:
The effect of propolis on experimental carcinogenesis is discussed, as well as its possible mechanisms of action against tumours, involving apoptosis, cell cycle arrest and interference on metabolic pathways. Propolis seems to be efficient against different tumour cells both in vitro and in vivo, which suggests its potential in the development of new anticancer drugs.

Summary:
Propolis extracts may be important economically and would allow a relatively inexpensive cancer treatment. Preclinical investigations are needed to further elucidate the benefits of propolis and its anti-tumour properties.

Red Propolis Extract Kills More Leukemia Cancer Cells

the unrelenting power of propolis, proving once again its anti-carcinogenic properties...

Comparisonof Effects of the Ethanolic Extracts of Brazilian Propolis on Human LeukemicCells As Assessed with the MTT Assay

Propolis isa resinous product collected by honey bees. It was also reported that propolishas a wide variety of biological actions, including antimicrobial activity andantioxidant, anti-inflammatory, and suppressive effects of dioxin toxicity activities.

The aim ofthis study was to compare the in vitro cytotoxic activities of green propolis(G12) and red propolis (G13) in human leukemia cells. These cells wereincubated with different concentrations of propolis and 48 hours after the IC50was calculated for each cell.

The resultsshowed that the red propolis has cytotoxic effect in vitro higher than greenpropolis. Red propolis was showed to be cytostatic in K562 cells and caused thesame amount of apoptosis as its control Gleevec.

Inconclusion, these results showed that red propolis is more cytotoxic than thegreen propolis in a variety of human cell lines of leukemia. Red propolis maycontain drugs capable of inhibiting cancer cell growth. Therefore, furtherisolation of respective chemical ingredients from the red propolis (G13) foridentification of the activities is necessary.

Royal Jelly Protects Kidneys, Liver from Anti-Cancer Treatments

New research from Turkish researchers confirm the protective properties of Royal Jelly against damage caused by anti-cancer therapies. Could this be new ground towards complementary alternative therapies? 

Royal Jelly Modulates Oxidative Stress and Apoptosisin Liver and Kidneys of Rats Treated with Cisplatin

Abstract:
Cisplatin (CDDP) is one of the most active cytotoxicagents in the treatment of cancer and has adverse side effects such asnephrotoxicity and hepatotoxicity. The present study was designed to determinethe effects of royal jelly (RJ) against oxidative stress caused by CDDP injuryof the kidneys and liver, by measuring tissue biochemical and antioxidantparameters and investigating apoptosis immunohistochemically.

Twenty-four Sprague Dawley rats were divided into fourgroups, group C: control group received 0.9% saline; group CDDP: injected i.p.with cisplatin (CDDP, 7 mg kg(-1) body weight i.p., single dose); group RJ:treated for 15 consecutive days by gavage with RJ (300 mg/kg/day); group RJ +CDDP: treated by gavage with RJ 15 days following a single injection of CDDP.Malondialdehyde (MDA) and glutathione (GSH) levels, glutathione S-transferase(GST), glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD)activities were determined in liver and kidney homogenates, and the liver andkidney were also histologically examined.

RJ elicited a significant protective effect towardsliver and kidney by decreasing the level of lipid peroxidation (MDA), elevatingthe level of GSH, and increasing the activities of GST, GSH-Px, and SOD. In theimmunohistochemical examinations were observed significantly enhanced apoptoticcell numbers and degenerative changes by cisplatin, but these histologicalchanges were lower in the liver and kidney tissues of RJ + CDDP group. Besides,treatment with RJ lead to an increase in antiapoptotic activity hepatocytes andtubular epithelium.

In conclusion, RJ may be used in combination withcisplatin in chemotherapy to improve cisplatin-induced oxidative stressparameters and apoptotic activity...

excerpt:
Recently, royal jelly (RJ) has received particularattention because of studies that have reported that it is a highly efficientantioxidant and has free radical scavenging capacity [4, 15]. Royal jelly is asecretion produced by the hypopharyngeal and mandibular glands of workerhoneybees (Apis mellifera). It contains many important compounds withbiological activity such as free amino acids, proteins, sugars, fatty acids,minerals, and vitamins [16]. So far, RJ has been demonstrated to possessseveral physiological activities in experimental animals, includingvasodilative and hypotensive activities [17], the induction of decrease inserum cholesterol levels [18], antimicrobial [19], antiallergic [20],anti-inflammatory [21], immunomodulatory [22, 23], and antioxidant properties[16]. In addition, Kanbur et al. [24] revealed the protective effect of RJagainst paracetamol-induced liver damage in mice.

Bee Venom Component Protects Liver Cells Against Injury

Is there anything from honey bees that isn't good?!?!?!


Protective Effects of Melittin on Transforming Growth Factor-β1 Injury to Hepatocytes Via Anti-Apoptotic Mechanism


About this Journal

Melittin is a cationic, hemolytic peptide that is the main toxic component in the venom of the honey bee (Apis mellifera). Melittin has multiple effects, including anti-bacterial, anti-viral and anti-inflammatory, in various cell types. However, the anti-apoptotic mechanisms of melittin have not been fully elucidated in hepatocytes.


Apoptosis contributes to liver inflammation and fibrosis. Knowledge of the apoptotic mechanisms is important to develop new and effective therapies for treatment of cirrhosis, portal hypertension, liver cancer, and other liver diseases.

In the present study, we investigated the anti-apoptotic effect of melittin on transforming growth factor (TGF)-β1-induced apoptosis in hepatocytes. TGF-β1-treated hepatocytes were exposed to low doses (0.5 and 1 μg/mL) and high dose (2 μg/mL) of melittin. The low doses significantly protected these cells from DNA damage in TGF-β1-induced apoptosis compared to the high dose. Also, melittin suppressed TGF-β1-induced apoptotic activation of the Bcl-2 family and caspase family of proteins, which resulted in the inhibition of poly–ADP–ribose polymerase (PARP) cleavage.

These results demonstrate that TGF-β1 induces hepatocyte apoptosis and that an optimal dose of melittin exerts anti-apoptotic effects against TGF-β1-induced injury to hepatocytes via the mitochondrial pathway. These results suggest that an optimal dose of melittin can serve to protect cells against TGF-β1-mediated injury.

Highlights

► We investigated the anti-apoptotic effect of melittin on TGF-β1-induced apoptosis in hepatocytes.
► TGF-β1 induces hepatocyte apoptosis.
► TGF-β1-treated hepatocytes were exposed to low doses (0.5 and 1 μg/mL) and high dose (2 μg/mL) of melittin.
An optimal dose of melittin exerts anti-apoptotic effects to hepatocytes via the mitochondrial pathway.

Algerian Propolis Extract Protects Against Kidney Damage

Another plus from the powerhouse of protection - Propolis!

Polyphenolic fraction of Algerian propolis protects rat kidney against acute oxidative stress induced by doxorubicin
Indian Journal of Nephrology, June 28, 2011

Introduction
Indian Journal of NephrologyPropolis is a complex resinous hive product, a mixture of wax, sugars and plant exudates collected by bees from plants sources. [1],[2],[3],[4] Its chemical and constituents composition depends on its floral origin, and varies according to climatic and geographical conditions. [5],[6] Flavonoids and phenolic compounds appear to be the principal components responsible for the biological activities. [6] By their antioxidant activity, flavonoids are able to attenuate the development of cancer and inflammatory diseases. [7] Indeed, one of the most exciting recent findings about propolis is its efficacy in cancer prevention and treatment. [8],[9] Propolis inhibits cancer cell growth by increasing the process of apoptosis by a pro-oxidant effect inducing apoptosis in human melanoma cells or by oxygen species production. In addition, propolis can prevent drug side-effects and reduce drug resistance.

Propolis has many anti-oxidant and antiapoptotic properties. Phenolic compounds (flavonoids and phenolic acid derivatives) are the most important pharmacologically active constituents in propolis. However, the constituents of propolis vary widely with climate and location. The major flavonoids detected from the extracts in our study were, pinostrobin chalcone, tectochrysin. We observed some similarities in the qualitative composition between the Algerian and Turkish propolis...

We evaluated the effects of propolis extract on renal oxidative stress induced by doxorubicin throughout an analytical and pharmacological study of the eastern Algerian propolis using thin layer chromatography, ultra-violet-high-performance liquid chromatography) and gas chromatography-mass spectrometry.


Materials and Methods
The pharmacological study was carried out in vivo on Wistar rat pre-treated with propolis extract 100 mg/kg/day for seven days. Doxorubicin at 10 mg/kg of body weight was administered intravenously on Day 7. Serum creatinine concentration, scavenging effect of flavonoids, lipid peroxidation and glutathione concentration were measured. Chemical analysis allowed identification and quantification of the phenolic compounds including pinostrombin chalcone (38.91%), galangin (18.95%), naringenin (14.27%), tectochrysin (25.09%), methoxychrysin (1.14%) and a prenylated coumarin compound suberosin (1.65%). The total flavonoid concentration in the propolis extract was 370 mg (quercetin equivalents QE) /g dry weight (QE/g DWPE)...


Conclusions
Propolis extract (EEP) restored the renal functions and reduced the toxic effect of doxorubicin. These data show a protective effect of Algerian propolis extract (EEP) against doxorubicin-induced oxidative stress. 


 
Support : Creating Website | SEO Template | Free Template
Copyright © 2011. Natural Medicine - All Rights Reserved
Proudly powered by Blogger