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Fucoidan

Fucoidan is a complex sulfated polysaccharide found in various species of brown seaweed.
It has been the subject of extensive research for its potential therapeutic applications, including anti-inflammatory, anti-coagulant, and anti-cancer properties.
PubCompare.ai leverages AI-driven comparisons across scientific literature, preprints, and patents to help researchers optimize their Fucoidan studies, enhancing reproducibility and accuracy.
With PubCompare.ai, users can effortlessly locate the most reliable Fucoidan research and discover the best protocols and products to advance their investigations.

Most cited protocols related to «Fucoidan»

ROS production, MitoSOX generation, and GSH depletion were used to examine oxidative stress changes, which were detected by 2′,7′-dichlorodihydrofluorescein diacetate (H2DCFDA) (Sigma-Aldrich, St. Louis, MO, USA) (10 μM, 30 min) [28 (link)], MitoSOX™ Red (50 nM, 30 min), and 5-chloromethylfluorescein diacetate (CMF-DA) (Thermo Fisher Scientific, Carlsbad, CA, USA) (5 μM, 20 min) [29 (link)], for ROS, MitoSOX, and GSH, respectively. After the reaction in darkness at 37 °C, these detecting dyes became fluorescent and were conducive to flow cytometry analysis (FL1, FL2, and FL1 channels for ROS, MitoSOX, and GSH, respectively). The actual setting for the windows is presented in Supplementary Figure S2.
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Publication 2022
2',7'-dichlorodihydrofluorescein diacetate 5-chloromethylfluorescein diacetate Darkness Dyes Flow Cytometry MitoSOX Oxidative Stress
DNA damage markers γH2AX and 8-OHdG [36 (link)] were examined. For γH2AX measurement, cells were fixed and mixed with an antibody for γH2AX [36 (link)] (Santa Cruz Biotechnology; Santa Cruz, CA, USA) (4 °C, 1 h) and Alexa Fluor 488 secondary antibody (Cell Signaling Technology, Danvers, MA, USA). Then, cells were mixed with 7AAD (5 μg/mL, 30 min). In terms of 8-OHdG detection, cells were fixed and incubated with an FITC-8-OHdG antibody (Santa Cruz Biotechnology, Santa Cruz, CA, USA) (4 °C, 1 h). Finally, they were analyzed by flow cytometry (FL1/FL3 and FL1 channels for γH2AX/7AAD and 8-OHdG, respectively). The actual settings for the windows are presented in Supplementary Figures S3 and S4.
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Publication 2022
7-aminoactinomycin D 8-Hydroxy-2'-Deoxyguanosine alexa fluor 488 Cells Flow Cytometry Fluorescein-5-isothiocyanate Immunoglobulins Markers, DNA
CAL 27, HSC-3 (ATCC; Manassas, VA, USA), and Ca9-22 (RIKEN BioResource Research Center; Tsukuba, Ibaraki, Japan) oral cancer cell lines were included. The OC-2 [23 (link)] and OECM-1 [24 (link)] oral cancer cell lines were provided by Dr. Wan-Chi Tsai (Kaohsiung Medical University, Kaohsiung, Taiwan). They were established from gingival (Ca9-22 and OCEM-1), tongue (CAL 27 and HSC-3), and buccal mucosa (OC-2) oral squamous cell carcinoma (OSCC). A non-malignant normal gingival epithelial Smulow–Glickman (S–G) cell line [25 (link),26 ], commonly used for examining the safety of anti-oral cancer drugs [27 (link)], was chosen as the control. Cells were maintained in a 3:2 medium mixture of DMEM and F12 (Gibco, Grand Island, NY, USA), supplemented with 10% fetal bovine serum and P/S antibiotics [28 (link)]. For all flow cytometry experiments, cells were seeded at a density of 4 × 104/well/12-well plate and incubated overnight before drug treatment.
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Publication 2022
Antibiotics Cancer of Mouth Cell Lines Cells Fetal Bovine Serum Flow Cytometry Gingiva Malignant Neoplasms Mucosa, Mouth Pharmaceutical Preparations Safety Squamous Cell Carcinoma of the Mouth Tongue
In order to determine the inhibition rate of cell viability, measured by MTT assay, per dose of gemcitabine and fucoidan, log-probit linear regression analysis was performed according to method described by Litchfield and Wilcoxon [17 (link),18 (link)]. Median inhibitory concentrations (IC50) for gemcitabine and fucoidan in ESS-1, SK-UT-1, and SK-UT-1B cell lines were calculated according to method previously described [19 (link)]. Due to lack of cells response, the IC50 was not achievable for fucoidan in MES-SA cell line [10 (link)]. Parallelism between dose–response curves for gemcitabine and fucoidan in ESS-1, SK-UT-1, and SK-UT-1B cell lines was confirmed by log-probit method, as it was described in detail previously [18 (link)]. Next, isobolographic analysis of interactions between drugs for the combination of gemcitabine and fucoidan in tested cell lines were performed according to the method presented by i.a. Tallarida et al. [20 (link)]. The median additive inhibitory concentrations (IC50 add) for two-drug mixtures were theoretically calculated according to the method described elsewhere [20 (link)]. The calculated values were used for performing MTT tests on ESS-1, SK-UT-1, and SK-UT-1B cell lines—the assessment of experimentally derived IC50 mix values for tested drug combinations in a fixed 1:1 ratio. The particular drug concentrations (gemcitabine and fucoidan) in the mixture were calculated by multiplying IC50 mix values accordingly to proportions in additive mixture. Detailed description of isobolographic method was introduced by Tallarida, Grabovsky and Luszczki [20 (link),21 (link),22 (link)]. The results of MTT test were analyzed by one-way ANOVA test, Tukey’s Multiple Comparison Post-test using GraphPad Prism 5.0 (GraphPad Softwere Inc., San Diego, CA, USA). The p < 0.05 was considered as statistically significant.
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Publication 2019
Biological Assay Cell Lines Cells Cell Survival Drug Combinations fucoidan Gemcitabine neuro-oncological ventral antigen 2, human Pharmaceutical Preparations prisma Psychological Inhibition
The chemical extraction of crude fucoidans was performed in 0.1 M HCl solution with a ratio of seaweed to extracting liquid of 1:20 and treatment for 3 h at 70 °C (methodology modified from Ale et al. 2012 [53 (link)]). The supernatant (Extract A, Figure 5a)) was collected by centrifugation for 10 min. at 19000 rpm. Next, 2% CaCl2 solution was added to remove alginate as a precipitate after centrifugation (Figure 5). The crude fucoidans were isolated from the supernatant by 72% ethanol (EtOH), recovered by centrifugation at 19000 rpm for 30 min, and lyophilized. The latter steps were comparable to the enzyme-assisted extraction method (Figure 5).
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Publication 2020
Alginate Centrifugation Enzymes Ethanol

Most recents protocols related to «Fucoidan»

The majority of fucoidans (15) were supplied by International Flavours and Fragrances incorporated (IFF) N&H Germany GmbH & Co. KG, Walsrode, Germany. The fucoidans were isolated from Laminaria hyperborea, using a patented solvent free extraction process (Hjelland et al 2013) . Briefly, the seaweed was harvested near the coast of Norway and stored in containers allowing fucoidan to leach out in water. The exudate solution was collected and purified via ultrafiltration with a molecular weight cut off greater than 10 kDa. Fucoidan was thus contained in the retentate and isolated as a brownish solid via spray-drying. The remaining three fucoidans were purchased from Sigma Aldrich (Merck Life Science A/S, Denmark) and isolated from Fucus vesiculosus (F8190), Undaria pinnatifida (F8315), and Macrocystis pyrifera (F8065), respectively.
The MW was determined using size exclusion chromatography. Viscosity was determined by preparing a 1 wt.-% aqueous solution of fucoidan by dissolving 1.00 g fucoidan powder in 99.00 g deionized water. The temperature of the solution was equilibrated at 20 °C. The spindle of a Brookfield viscosimeter (LVT) was immersed in the solution and rotated at 60 rpm. After one minute, the viscosity was read off at the viscosimeter. pH was measured using the same 1 wt.-% aqueous solution equilibrated at 20 °C. The electrode of a pH meter was immersed in the solution and the pH was read as soon as the indicated value was stable for one minute.
Moisture content was assessed by weighing one gram of the sample to the nearest 0.0001 g in a bottle and heated to 105 ± 2 °C until a constant weight was reached. Then, the weighing bottle was removed from the oven, covered with a lid immediately, cooled in a desiccator for 1 h and weighed to the nearest 0.0001 g. The moisture content was derived from the difference of the two obtained values. The sulfur content was determined according to the Schöniger flask test (MacDonald 1961) .
Publication 2024
Fucus vesiculosus fucoidan (FVF, batch No. DPFVF2021001) and Undaria pinnatifida fucoidan (UPF; batch No. DPGFS2019537) were provided by Marinova (Cambridge, TAS, Australia). The materials were extracted using a proprietary aqueous extraction process. The fucoidan purity of both samples was >95% (dry weight). The fucoidan component and compositional profile for each material can be found in Table 1. The calculation of fucoidan purity requires several inputs that are determined using a range of spectrophotometric assays. The total carbohydrate content of a hydrolyzed sample was assessed using the phenol–sulfuric technique developed by [57 (link)], while the uronic acid concentration was determined in the presence of 3-phenylphenol, based on the method by [58 (link)]. Sulfate content was analyzed using a BaSO4 precipitation method [59 (link)]. UPF and FVF were dissolved in saline solution to perform the assays.
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Publication 2024
Fucoidan nanoparticles synthesised by the polyelectrolyte complexation method were characterised by FTIR and 1 H NMR. FTIR-ATR spectroscopy was carried out to characterise the Fu-PEI complex using the FTIR-ATR model IR Prestige-21 Shimadzu spectrophotometer. The spectra of fucoidan, PEI and FuNPs were recorded at 4 cm -1 resolution with 20 scans. The absorbance bands were measured as a function of wave numbers between 400 and 4000 cm -1 . Pure fucoidan and the fucoidan-PEI complex were dissolved in methanol-d 4 , and 1 H NMR spectra were recorded using a Bruker AMX500 spectrometer. The chemical shifts δ are given in ppm and referenced to the external standard TMS or an internal solvent standard. Crystallinity and thermal stability of fucoidan nanoparticles were evaluated by XRD and thermogravimetric analysis, respectively.
Publication 2024
The alternate extraction methods were studied for the isolation of fucoidan from Cystoseira sp. and Padina pavonica, shown in Figure 2.
Extraction of Fucoidan -Marine brown algae species were extracted for fucoidan with some modi cation according to the method proposed by Manikandan et al. (2020) (link) and Ganapathy et al. (2019) (link). Each brown alga powder (50 g) was mixed with 1000 mL of teksoll 96% (Ethyl alcohol 96% + 2propanol mixture) (Tekkim, Turkey), and magnetically stirred for 18 hours at room temperature. The extract was then centrifuged at 6000 rpm for 30 min. The supernatant was removed to separate proteins and pigments. The obtained pellet was washed with acetone and dried overnight at room temperature. The dried pellet (5 g) was dissolved in 100 mL distilled water and stirred with a magnetic plate at 65 °C for 90 min. After centrifugation at 6000 rpm for 30 min, the residue was removed, and the supernatant was collected. 100 mL CaCl 2 (1%) was added to the supernatant to precipitate the alginate, and the solution was stored overnight at 4 °C. The resultant solution was centrifuged at 6000 rpm for 30 min.
The supernatant was separated, and subsequently added to ethanol (96%) to obtain a nal ethanol concentration of 30% (v/v). Then the solution was stored at 4 °C for 4 h. This solution was centrifuged at 6000 rpm for 30 min, and the supernatant was collected. After the centrifugation, ethanol (96%) was added again to reach 70% total ethanol concentration (v/v), and the nal mixture was stored overnight at 4 °C. Following overnight incubation, this solution was ltered with a cellulose acetate lter (0.45 μm pore size) to obtain the fucoidan. Finally, the fucoidan fraction retained on the lter was freeze-dried with a freeze-dryer (Labconco FreeZone 4.5).
Fucoidan Puri cation Method 1 -In rst puri cation method, freeze-dried fractions of fucoidan from Cystoseira sp. and Padina pavonica were puri ed according to Manikandan et al. (2020) (link) with some modi cations. Dried fucoidan from each marine brown algae was dissolved in distilled water at 65°C and mixed with 3.0 M HCl for 3 h using a magnetic stirrer. Following the cool down of mixture to room temperature, centrifuged at 5000 rpm for 10 min. The collected supernatant was neutralized to pH 7 with 3M NaOH and precipitated overnight with 4 volumes of ethanol with respect to total volume. The mixture was centrifuged at 6000 rpm for 45 min, and the supernatant was discarded. The pellet of puri ed fucoidan was washed with 10 mL distilled water and freeze-dried. The dried sample was coded as Sample Group 1 (SG1) and stored airtight in 1.5 mL tubes at room temperature.
Fucoidan Puri cation Method 2 -In the second method, puri cation of freeze-dried fucoidan fractions from Cystoseira sp. and Padina pavonica were carried out according to Yamazaki et al. (2016) (link) with some modi cations. Dried fucoidan pellets of Cystoseira sp. and Padina pavonica were suspended in 5 mM HCl. Followingly, the mixtures were shaked at 200 rpm for 24 h at 18°C. Then, the samples were centrifuged at 5000 rpm for 10 min. The collected supernatant was precipitated overnight with four volumes ethanol to total volume at 4 °C. The mixture was centrifuged at 6000 rpm for 45 min, and the supernatant was discarded. The pellet of pure fucoidan was washed with 2 mL distilled water and freeze-dried. The dried sample was coded as Sample Group 2 (SG2) and stored airtight in 1.5 mL tubes at room temperature.
Publication 2024
Fucoidan was obtained from Qingdao Mingyue Seaweed Group Co., Ltd. It was extracted from Undaria pinnatifida. The dry Undaria pinnatifida powder was extracted in hot water at 100 °C for 4 h with a solid–liquid ratio of 1:50 (w/v). The residue was removed using filtration and centrifugation and the extraction solution was concentrated using a vacuum rotary evaporator (Hei-VAP values Digital, Heidoph, Nuremberg, Germany). The polysaccharide was precipitated using ethanol. The mixtures were kept at 4 °C for 12 h and then the polysaccharide precipitate was obtained using centrifugation at 8000 rpm for 20 min and dried at room temperature. The fucoidan obtained after the precipitated solution was freeze-dried (vacuum freeze dryer, ALPHA 1–2 LDplus, Christ, Osterode, Germany).
The fucoidan was degraded by UV/H2O2. Firstly, 25 mL 2.4 mg/mL Fuc solution, 3 mL H2O2, and 2 mL deionized water were transferred into a 90 mm culture dish. The final concentration of H2O2 was 100 mmol/L, the irradiation dose was 6500 mJ/cm2 and the final concentration of the Fuc was 2 mg/mL. Mixtures were treated in a UV irradiation system (HOPE-MED 8140, Hepu, Beijing, China) for 0, 15, 30, 45, 60, 75, 90, 120, 150, and 180 min, respectively. In the end, catalase was used to remove residual H2O2 from each group. Finally, the degraded fucoidan obtained after the solution was concentrated using a vacuum rotary evaporator (55 °C, 100 rpm) and then freeze-dried.
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Publication 2024

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Fucoidan is a type of sulfated polysaccharide derived from various species of brown seaweed. It is a naturally occurring compound that can be extracted and used in various laboratory applications. Fucoidan exhibits diverse biological activities and is often utilized in research studies for its potential functional properties.
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Fetal Bovine Serum (FBS) is a cell culture supplement derived from the blood of bovine fetuses. FBS provides a source of proteins, growth factors, and other components that support the growth and maintenance of various cell types in in vitro cell culture applications.
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DMSO is a versatile organic solvent commonly used in laboratory settings. It has a high boiling point, low viscosity, and the ability to dissolve a wide range of polar and non-polar compounds. DMSO's core function is as a solvent, allowing for the effective dissolution and handling of various chemical substances during research and experimentation.
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Penicillin/streptomycin is a commonly used antibiotic solution for cell culture applications. It contains a combination of penicillin and streptomycin, which are broad-spectrum antibiotics that inhibit the growth of both Gram-positive and Gram-negative bacteria.
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TRIzol reagent is a monophasic solution of phenol, guanidine isothiocyanate, and other proprietary components designed for the isolation of total RNA, DNA, and proteins from a variety of biological samples. The reagent maintains the integrity of the RNA while disrupting cells and dissolving cell components.
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Fucus vesiculosus is a species of brown seaweed commonly known as bladder wrack or rockweed. It is a macroalgae that can be used in laboratory settings for various research and experimental purposes. The core function of Fucus vesiculosus is to serve as a model organism for studies in areas such as phycology, marine biology, and environmental science.
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Fucoidan from Fucus vesiculosus is a naturally occurring polysaccharide extracted from the brown seaweed Fucus vesiculosus. It is a complex sulfated polysaccharide that exhibits various biological activities.
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RPMI 1640 medium is a commonly used cell culture medium developed at Roswell Park Memorial Institute. It is a balanced salt solution that provides essential nutrients, vitamins, and amino acids to support the growth and maintenance of a variety of cell types in vitro.
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Streptomycin is a broad-spectrum antibiotic used in laboratory settings. It functions as a protein synthesis inhibitor, targeting the 30S subunit of bacterial ribosomes, which plays a crucial role in the translation of genetic information into proteins. Streptomycin is commonly used in microbiological research and applications that require selective inhibition of bacterial growth.
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DMEM (Dulbecco's Modified Eagle's Medium) is a cell culture medium formulated to support the growth and maintenance of a variety of cell types, including mammalian cells. It provides essential nutrients, amino acids, vitamins, and other components necessary for cell proliferation and survival in an in vitro environment.

More about "Fucoidan"

Fucoidan is a complex sulfated polysaccharide found in various species of brown seaweed, including Fucus vesiculosus.
It has been extensively researched for its potential therapeutic applications, such as anti-inflammatory, anti-coagulant, and anti-cancer properties.
PubCompare.ai, an AI-driven platform, helps researchers optimize their Fucoidan studies by facilitating comparisons across scientific literature, preprints, and patents, ultimately enhancing the reproducibility and accuracy of their investigations.
Researchers can leverage PubCompare.ai to effortlessly locate the most reliable Fucoidan research and discover the best protocols and products to advance their studies.
This includes exploring related terms and subtopics, such as FBS (Fetal Bovine Serum), DMSO (Dimethyl Sulfoxide), Penicillin/Streptomycin, TRIzol reagent, and RPMI 1640 medium, which are commonly used in Fucoidan research.
By incorporating these insights, researchers can optimize their experimental design and improve the overall quality of their Fucoidan-related investigations.
PubCompare.ai's AI-driven comparisons across the scientific landscape empower researchers to make informed decisions, enhance the reproducibility of their studies, and advance the field of Fucoidan research.
With its user-friendly interface and comprehensive data, PubCompare.ai is an invaluable tool for scientists seeking to maximize the impact and accuracy of their Fucoidan-focused work.