Pine Bark Extract Research Articles

Storage Procedures Affect pH, Electrical Conductivity, and Nutrient Concentrations of Pour-through Leachate from Pine Bark and Peat-based Substrates

The pour-through (PT) method is used in greenhouse and nursery production to monitor nutrient availability in soilless substrates. Efficacy of this method is based on the assumption that chemical properties of extracted solutions remain stable from the moment of collection until analysis. Extracted substrate solution can be analyzed directly in the greenhouse or sent to laboratories for complete nutritional analysis; thus, proper sample preservation methods (e.g., filtration and low temperatures) are critical for reducing sample contamination or degradation during storage. However, evidence of how these preservation methods affect chemical characteristics of PT samples is limited. The objective of this study was to evaluate the effect of storage time, storage temperature, and filtration of PT samples on pH, electrical conductivity (EC), and nutrient concentrations from pine bark– and peat-based substrates. PT extracts were obtained from liquid-fertilized fallow pots of either 100% milled pine bark (Expt. 1) or a 4 sphagnum peat: 1 perlite (by volume) substrate (Expt. 2). Aliquots of PT extract were either filtered or nonfiltered and then stored in plastic bottles at −22, 4, or 20 °C. EC, pH, and nutrient concentrations were analyzed at 0, 1, 7, and 30 days after PT sample collection. EC and pH in PT extracts of peat and pine bark, respectively, changed 1 day after collection. Storage time had the greatest effect on nutrient concentrations of samples stored at 20 °C. However, at day 30, nutrient concentrations had also changed in samples stored at 4 and −22 °C. Analytes that fluctuated most in both experiments and across all preservation treatments were dissolved organic carbon, total dissolved nitrogen, NO3−-N, and PO43−-P, whereas Ca2+, Mg2+, and SO42−-S were more stable in PT samples. This research suggests EC and pH should be analyzed immediately, whereas samples requiring nutrient analysis should be filtered immediately after collection, stored at 4 or −22 °C (preferably −22 °C), and analyzed within 7 days of collection.

Pine bark (Pinus spp.) extract for treating chronic disorders.

Pine bark (Pinus spp.) extract for treating chronic disorders.

French maritime pine bark extract (pycnogenol) in association with triple combination cream for the treatment of facial melasma in women: a double-blind, randomized, placebo-controlled trial.

Melasma can be recalcitrant to treatment, and relapses are common. Pycnogenol has been reported to be effective in treating melasma. To compare the efficacy, safety and tolerability of 75mg pycnogenol taken orally twice a day vs. a placebo, in association with the triple combination and broad-spectrum sunscreen for the treatment of facial melasma. A randomized, double-blind, parallel, placebo-controlled study was conducted on 44 women with facial melasma in a single centre from May 2019 through November 2019. Patients with melasma were randomly assigned to orally take 75mg pycnogenol (PYC) or a placebo (PLAC) twice a day for 60days. Both groups also received tinted sunscreen [Sun Protection Factor (SPF) 50; Persistent Pigment Darkening (PPD) 17] for daytime use and a topical triple combination at bedtime. The primary outcome was a change from the baseline Modified Melasma Area Severity Index (mMASI) score. Secondary outcomes were improvements in the patients' quality of life (MELASQoL), colorimetric indices and Global Aesthetic Improvement Scale (GAIS). All participants completed the trial. The mean (SD) age of the participants was 39 (7) years, and 91% were phototypes III-IV. Both groups exhibited a reduction in mMASI scores, MELASQoL scores and colour contrast (P<0.01). The mean (CI 95%) reductions of the mMASI scores were 49% (36-61%) for PYC and 34% (16-47%) for PLAC. The reductions in mMASI scores and colorimetric contrast were superior for the PYC group (P<0.05). The analysis of GAIS resulted in an improvement of 86% (CI 95%: 68-96%) for the participants in the PYC group and 55% (CI 95%: 32-73%) for those in the PLAC group. There were no adverse effects related to oral treatment. Pycnogenol is well-tolerated and increases the effectiveness of broad-spectrum sunscreen and the triple combination in the treatment of facial melasma in women.

Deposition Efficacy of Natural and Synthetic Antioxidants on Fabrics

Pine bark extracts were tested as valid natural alternatives to common phenolic antioxidants to be deposited onto solid matrices. An analytical method for determining both deposition-efficacy and maintenance of antioxidant activity on fabrics surfaces was developed and successfully applied to phenolic antioxidants and pine tannins onto cotton fabric samples. Accumulated data suggest that common phenolic antioxidants and tannin contribute to an elevated antioxidant activity on fabric. A known source of odour is autoxidation of residual sebum on fabric, leading to the generation of malodourous compounds. Therefore, antioxidants hold the promise for mitigating malodour on fabrics, a top unmet consumer need around the globe.

Influence of Pinus brutia bark extract containing phenolic compounds on some commensal and pathogenic bacteria from the intestinal microflora

The microflora of the intestinal tract is vital to many physiological functions, mainly fermentation and processing of dietary components, control of intestinal epithelial cell proliferation, development of the immune system, and protection against pathogens. Plant extracts have potential for treatment options that protect commensal or beneficial microflora in the intestines while eliminating pathogens. The aim of the present study was to investigate the influence of Pinus brutia (Turkish red pine) bark extract containing phenolic compounds on some commensal and pathogenic bacteria from the intestinal microflora using a microdilution method. P. brutia bark extract did not completely inhibit any intestinal bacteria. However, the extract showed a potential inhibitor activity on Salmonella Typhimurium and Staphylococcus aureus from 75 µg/mL, on Escherichia coli and Fusobacterium nucleatum from 150 µg/mL, and on Clostridium perfringens from 300 µg/mL concentrations (P&amp;lt;0.05). Commensal bacteria were observed to be less sensitive to the extract than those of the pathogenic strains. The extract stimulated moderately the growth of Bifidobacterium bifidum from 75 µg/mL dose (P&amp;lt;0.05). The extract did not show any activity on Lactobacillus acidophilus. A potential inhibitor activity was observed for Bifidobacterium infantis and Lactobacillus casei at 600-2400 µg/mL (P&amp;lt;0.05). As a conclusion, P. brutia bark extract, at 75-300 μg/mL dose range, had a potential to restrict pathogenic bacteria in the intestines while protect commensal or beneficial ones. Specified effects might be mainly attributed to its polyphenolic content.

083 The Effect of Ristela Supplementation on Female Sexual Function in Women Taking Antidepressants: An Open Label Trial

Impaired sexual desire, arousal, and orgasm are common in women taking antidepressants. Ristela® is a hormone-free supplement that has been shown to improve female sexual function in three randomized controlled trials. Comprised of Pycnogenol® (French Maritime Pine Bark extract), L-Arginine, L-Citrulline, and a proprietary rose hip extract, Ristela is formulated to increase nitric oxide production, blood flow, and delivery of nutrients and oxygen to tissues including the reproductive organs and brain.

Properties and release kinetics of pine bark incorporated agar and carrageenan film

SummaryEffects of plasticisers (glycerol, sorbitol and polypropylene glycol) and blend ratios on release behaviour, molecular vibration, mechanical and water barrier properties in agar and carrageenan films incorporating pine bark extract were investigated. Infrared spectra indicated hydrogen bonding of sorbitol and polypropylene glycol with film polymers which improved water diffusion and agar solubility but showed no effect in carrageenan films due to high water affinity. Hydrophilicity of the plasticisers modified dissolution of films and strongly affected the release behaviours of polyphenols and antioxidant capacity (DPPH• and FRAP). Film solubility showed high correlation to release behaviours. Fick’s diffusion kinetics fitted well to release behaviour of pine bark to aqueous media (water, 3% acetic acid and 10% ethanol). Agar gave a higher diffusion coefficient that was improved by the addition of sorbitol and polypropylene glycol. Increased diffusion coefficients enhanced degree of release, with some diversions suggesting that solvent modified matrices and, hence, release properties.

Effects of Pine Bark Extract on Attention-deficit Hyperactivity Disorder in Adults: A Randomized Double-blind Crossover Study

Effects of Pine Bark Extract on Attention-deficit Hyperactivity Disorder in Adults: A Randomized Double-blind Crossover Study

Industrial applications of selected JFS articles

Industrial applications of selected <i>JFS</i> articles

Assessment of safety and efficacy of pine bark extract in normal and ovariectomized mice.

We evaluated the influence of pine bark extract (PBE) on organs, the cytochrome-P450 (CYP) activities in liver and estrogenic effects in normal and ovariectomized (OVX) female mice. The PBE did not affect organ weights and liver-function indexes (activities of alkaline phosphatase, aspartate amino transferase, and alanine amino transferase) at doses; 0.04%, 0.4%, and 2.0% PBE in the diet, in normal and OVX female mice. In the OVX mice, CYP1A1 activity was significantly higher in the 0.4% and 2.0% PBE groups than in the OVX control group, and in the 0.4% and 2.0% PBE groups were significantly higher than in the 0.04% PBE group. CYP1A2 and 3A4 activities were significantly higher in the 2.0% PBE group than in all other groups. The PBE did not affect uterine weight and femoral bone mineral density at all PBE doses. These results showed that the dose of PBE at the recommended human intake, had no toxic and estrogenic effects in normal female and OVX mice, however, it may need attention to use the excess intake of PBE with some drugs in postmenopausal women.

Pinus maritimaExtract Induces Apoptosis in Human Malignant Melanoma Cells via ROS/Caspase-3 Signaling

Melanoma is the most aggressive type of skin cancer due to its rapid metastasis with a high recurrence rate following conventional therapy. Pine bark extract (PBE) from Pinus maritima contains numerous phenolic compounds and functions as a potent antioxidant. The present study aimed to analyze the potential anticancer properties of PBE on human malignant melanoma A375 cells. The chemical composition of PBE was determined by high-performance liquid chromatography/photodiode array detector. The effects of PBE on cell death, migration, and invasion were determined using xCELLigence Technology real-time cell analysis. Annexin/propidium iodide flow cytometry and Hoechst 33342 staining were conducted to detect cell apoptosis. PBE induced apoptosis and inhibited cell migration and invasion. Cleaved caspase-3 expression and activity were significantly increased ( P &lt; 0.01) in cells treated with PBE compared with control cells. PBE ameliorated hydrogen peroxide (H2O2)-induced reactive oxygen species (ROS) formation. Treatment of the cells with PBE in the presence of H2O2led to significant ( P &lt; 0.001) reduction of matrix metallopeptidase-9, which is a mediator responsible for advanced melanoma. PBE induces A375 programmed cell death and suppresses cellular invasion by attenuating the ROS-dependent pathway associated with MMP-9 reduction.

Antihypertensive Effects of Polyphenolic Extract from Korean Red Pine (Pinus densiflora Sieb. et Zucc.) Bark in Spontaneously Hypertensive Rats.

Korean red pine (Pinus densiflora Sieb. et Zucc.) bark is a by-product of the wood industry and contains a high level of antioxidative phenolics including flavonoids, which have a variety of beneficial health effects. This study aimed to investigate the antihypertensive effects of P. densiflora bark extract (Korean red pine bark extract; KRPBE) in spontaneously hypertensive rats (SHRs). A group of Wistar-Kyoto rats as a normotensive group was orally fed tap water. Four groups of SHRs were orally fed tap water, captopril (a positive control), 50 mg/kg/day of KRPBE, and 150 mg/kg/day of KRPBE, respectively. Blood pressure of rats was measured once every week for seven weeks of oral administration. After seven weeks, the lungs, kidneys, and serum were collected from rats, then angiotensin-converting enzyme (ACE) activity, angiotensin II content, and malondialdehyde (MDA) content were determined. Blood pressure of the captopril- and KRPBE-treated groups was significantly lower than that of the SHR control group. The ACE activity, angiotensin II content, and MDA content significantly decreased in the captopril- and KRPBE-treated groups than those in the SHR control group. High-performance liquid chromatography analysis revealed six phenolics in KRPBE: protocatechuic acid, procyanidin B1, catechin, caffeic acid, vanillin, and taxifolin. KRPBE, which contains plenty of antioxidative phenolics, has antihypertensive effects partly due to reduction of ACE activity and angiotensin II content, and its antioxidative effect.

Inhibitory Effects of Pinus Pinaster Aiton Subsp. Atlantica Bark Extracts Against Known Food Pathogens

Pine bark extracts are a rich source of natural polyphenols that besides their known antioxidant activity may also exhibit significant antimicrobial properties. In the current study, the antimicrobial activity of Pinus pinaster Aiton subsp. atlantica extracts was screened against gram-positive bacteria (Bacillus cereus, Clostridium perfringens, Listeria monocytogenes, Staphylococcus aureus), gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Salmonella enterica serovar Enteritidis) and the fungus Aspergillus brasiliensis ATCC 16404, using the disk diffusion assay. The hydroethanolic extracts obtained by Microwave assisted extraction (MAE) at 1600 W and 110 oC for 30 minutes, were compared to the Soxhlet extracts. The pine bark was dried to reach equilibrium humidity at 40 °C for 72 hours and milled to a particle’s size of 200-850 µm. The extraction yield was determined by the amount of extract recovered in mass compared to the initial amount of dry bark and the total phenolic content was determined by the Folin Ciocalteu colorimetric method at 725 nm. Hydroethanolic pine bark extracts were prepared at 0.25, 0.50 and 80.00 mg/mL concentrations.MAE attained higher extraction yield and higher total phenolic content (20.4±0.7% w/w and 71.1±3.4 mg of gallic acid equivalent (GAE) per g of sample, respectively) than Soxhlet extracts (17.6±0.2% w/w and 54.9±2.6 mg GAE/g sample, respectively).The pine bark extracts presented inhibition halos ranging from 7 to 17 mm against the gram positive bacteria, namely C. perfringens ATCC 13124 and B. cereus NCTC 11143. The MAE extracts presented higher inhibition halos than the Soxhlet ones. Regarding the tested concentrations, only C. perfringens ATCC 13124 and B. cereus NCTC 11143 were sensitive to the 0.25 and 0.50 mg/mL concentrations. At 80 mg/mL all the gram-positive bacteria were sensitive to the pine bark extracts obtained by both extraction methods. On the other hand, the extracts did not show inhibitory effect against the tested gram-negative bacteria and A. brasiliensis.This study reveals that MAE is a fast and efficient method for obtaining Pinus pinaster Aiton subsp. atlantica extracts with antimicrobial activities against Gram-positive bacteria.

Quality Characteristics of Beer with Pine Bark Extract

Quality Characteristics of Beer with Pine Bark Extract

Pine Bark Polyphenolic Extract Attenuates Amyloid-β and Tau Misfolding in a Model System of Alzheimer's Disease Neuropathology.

Plant-derived polyphenolic compounds possess diverse biological activities, including strong anti-oxidant, anti-inflammatory, anti-microbial, and anti-tumorigenic activities. There is a growing interest in the development of polyphenolic compounds for preventing and treating chronic and degenerative diseases, such as cardiovascular disorders, cancer, and neurological diseases including Alzheimer's disease (AD). Two neuropathological changes of AD are the appearance of neurofibrillary tangles containing tau and extracellular amyloid deposits containing amyloid-β protein (Aβ). Our laboratory and others have found that polyphenolic preparations rich in proanthocyanidins, such as grape seed extract, are capable of attenuating cognitive deterioration and reducing brain neuropathology in animal models of AD. Oligopin is a pine bark extract composed of low molecular weight proanthocyanidins oligomers (LMW-PAOs), including flavan-3-ol units such as catechin (C) and epicatechin (EC). Based on the ability of its various components to confer resilience to the onset of AD, we tested whether oligopin can specifically prevent or attenuate the progression of AD dementia preclinically. We also explored the underlying mechanism(s) through which oligopin may exert its biological activities. Oligopin inhibited oligomer formation of not only Aβ1-40 and Aβ1-42, but also tau in vitro. Our pharmacokinetics analysis of metabolite accumulation in vivo resulted in the identification of Me-EC-O-β-Glucuronide, Me-(±)-C-O-β-glucuronide, EC-O-β-glucuronide, and (±)-C-O-β-glucuronide in the plasma of mice. These metabolites are primarily methylated and glucuronidated C and EC conjugates. The studies conducted provide the necessary impetus to design future clinical trials with bioactive oligopin to prevent both prodromal and residual forms of AD.

An Acute, Placebo-Controlled, Single-Blind, Crossover, Dose-Response, Exploratory Study to Assess the Effects of New Zealand Pine Bark Extract (Enzogenol®) on Glycaemic Responses in Healthy Participants.

An acute, placebo-controlled, single-blind, crossover, dose-response, exploratory study was designed to investigate the hypoglycaemic effects of New Zealand pine bark extract (Enzogenol®). Twenty-five healthy participants categorised into having a monophasic or complex (biphasic or triphasic) glucose curve shape at the control visit consumed a placebo and Enzogenol® (50 and 400 mg) on three separate occasions before an oral glucose tolerance test (OGTT). In the monophasic group, 50 and 400 mg of Enzogenol® significantly reduced the mean glucose incremental area under the curve (iAUC) compared to control 241.3 ± 20.2 vs. 335.4 ± 34.0 mmol/L·min, p = 0.034 and 249.3 ± 25.4 vs. 353.6 ± 31.5 mmol/L·min, p = 0.012, respectively. The 400 mg dose further reduced the percentage increment of postprandial glucose (%PG) 31.4% ± 7.9% vs. 47.5% ± 8.6%, p = 0.010, glucose peak 7.9 ± 0.3 vs. 8.9 ± 0.3 mmol/L, p = 0.025 and 2h-OGTT postprandial glucose (2hPG) 6.1 ± 0.3 vs. 6.7 ± 0.3 mmol/L, p = 0.027. Glucose iAUC was not significantly different in the complex group, except for reductions in %PG 28.7% ± 8.2% vs. 43.4% ± 5.9%, p = 0.012 after 50 mg dose and 27.7% ± 5.4% vs. 47.3% ± 7.2%, p = 0.025 after 400 mg dose. The results suggest that Enzogenol® may have hypoglycaemic effects in healthy participants, especially those exhibiting monophasic shapes.

Evaluation of the effects of pycnogenol (French maritime pine bark extract) supplementation on inflammatory biomarkers and nutritional and clinical status in traumatic brain injury patients in an intensive care unit: A randomized clinical trial protocol

BackgroundTraumatic brain injury (TBI) is one of the major health and socioeconomic problems in the world. Immune-enhancing enteral formula has been proven to significantly reduce infection rate in TBI patients. One of the ingredients that can be used in immunonutrition formulas to reduce inflammation and oxidative stress is pycnogenol.ObjectiveThe objective of this work is to survey the effect of pycnogenol on the clinical, nutritional, and inflammatory status of TBI patients.MethodsThis is a double-blind, randomized controlled trial. Block randomization will be used. An intervention group will receive pycnogenol supplementation of 150 mg for 10 days and a control group will receive a placebo for the same duration. Inflammatory status (IL-6, IL- 1β, C-reactive protein) and oxidative stress status (malondialdehyde, total antioxidant capacity), at the baseline, at the 5th day, and at the end of the study (10th day) will be measured. Clinical and nutritional status will be assessed three times during the intervention. The Sequential Organ Failure Assessment (SOFA) questionnaire for assessment of organ failure will be filled out every other day. The mortality rate will be calculated within 28 days of the start of the intervention. Weight, body mass index, and body composition will be measured. All analyses will be conducted by an initially assigned study arm in an intention-to-treat analysis.DiscussionWe expect that supplementation of 150 mg pycnogenol for 10 days will improve clinical and nutritional status and reduce the inflammation and oxidative stress of the TBI patients.Trial registrationThis trial is registered at clinicaltrials.gov (ref: NCT03777683) at 12/13/2018.

Evaluation of Diuretic and Antioxidant Properties in Aqueous Bark and Fruit Extracts of Pine.

The present study has been carried out to evaluate the diuretic and antioxidant properties of pine herb in an animal model. 45 adult male rats were randomly divided into nine groups including: groups I (the negative control), groups II (positive control, furosemide 10 mg/kg), groups III to VIII (treatment groups received 100, 200, 400 mg/kg of the aqueous extracts of bark and fruit) and group IX received the combination of aqueous extract of bark (100 mg/kg) and the fruit (100 mg/kg). The urine output, glomerular filtration rate (GFR), electrolytes, urea, and creatinine levels were evaluated. Furthermore, the phenolic content and antioxidant activity of both extracts were also assessed using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and Folin-Ciocalteu methods. The aqueous extracts of the pine bark and fruit increased the urinary output in a dosedependent manner. The combination of the two extracts compared to the other extracts alone significantly increased the serum potassium level. This study also showed each extract increase creatinine clearance in a dose-dependent manner (p<0.01 and p<0.05). The increase of GFR in the combination group was not significant. The current data showed a significant increase in the total phenolic content in pine bark extract in compared with the fruit extract. The pine bark and fruit can be useful in the prevention and treatment of kidney stones due to the high diuretic properties and antioxidant activity.

Efficacy and safety of a supplement combination for hand osteoarthritis pain: protocol for an internet-based randomised placebo-controlled trial (The RADIANT study)

IntroductionHand osteoarthritis (HOA) is a highly prevalent disabling joint disease. The current management regimens are limited. Potentially as a consequence, many people turn to complementary and alternative medicines for symptomatic...

Tannins of Conifer Bark as Nordic Piquancy-Sustainable Preservative and Aroma?

Bark of Norway spruce and Scots pine trees contain large amounts of condensed tannins. Tannins extracted with hot water could be used in different applications as they possess antioxidative and antimicrobial activities. The use of bark tannins as e.g., food preservatives calls for increases in our knowledge of their antioxidative activities when applied in foodstuffs. To assess the ability of bark tannins to prevent lipid oxidation, hot water extracts were evaluated in a liposome model. Isolated tannins were also applied in dry-cured, salty meat snacks either as liquid extracts or in dry-powder form. Consumer acceptance of the snacks was tested by a sensory evaluation panel where outlook, odor, taste, and structure of the snacks were evaluated and compared to a commercial product without tannin ingredients. Our results show that conifer bark tannin-rich extracts have high capacity to prevent lipid oxidation in the liposome model. The efficacies of pine and spruce bark extracts were ten to hundred folds higher, respectively, than those of phenolic berry extracts. The bark extracts did not significantly influence the odor or taste of the meat snacks. The findings indicate that bark extracts may be used as sustainable food ingredients. However, more research is needed to verify their safety.