Home > Products > Featured products

Amyloid beta-peptide(25-35)

  Cat. No.:  DC65482   Featured
Chemical Structure
131602-53-4
For research use only. We do not sell to patients.
We match the best price and quality on market.
Email:order@dcchemicals.com  sales@dcchemicals.com
Tel:+86-021-58447131
Get Quotation Now
We are official vendor of:
  • 20
  • 19
  • 18
  • 17
  • 16
  • 15
  • 14
  • 12
  • 11
  • 10
  • 9
  • 8
  • 13
  • 6
  • 5
  • 4
  • 3
  • 2
  • 1
More than 5000 active chemicals with high quality for research!
Field of application
β-Amyloid (25-35) (Amyloid beta-peptide (25-35), Aβ25-35, β-Amyloid peptide (25-35)) , a sequence GSNKGAIIGLM, is a highly toxic synthetic derivative of Amyloid beta-peptide (Aβ-peptides) which forms fibrillary aggregates. β-Amyloid (25-35) is involved in the pathogenesis of Alzheimer's disease.
Chemicals PropertiesBiological activity COA & MSDSRelated productsDatasheet
Cas No.: 131602-53-4
Chemical Name: Amyloid beta-peptide(25-35)
Synonyms: L-Methionine,glycyl-L-seryl-L-asparaginyl-L-lysylglycyl-L-alanyl-L-isoleucyl-L-isoleucylglycyl-L-leucyl-;Amyloid β-Protein Fragment 25-35;Amyloid β -Protein (25- 35);Amyloid β-peptide (25-35) (human);GSNKGAIIGLM;L-Methionine,glycyl-L-seryl-L-asparaginyl-L-lysylglycyl-L-alanyl-L-isoleucyl-L-isoleucylglycyl...;ß-AMYLOID (25-35);AMYLOID BETA-PROTEIN (HUMAN, 25-35) TRIFLUOROACETATE;AC-ASN-TRP-CYS-LYS-ARG-GLY-ARG-LYS-GLN-CYS-LYS-THR-HIS-PRO-HIS-NH2: AC-NWCKRGRKQCKTHPH-NH2;-Amyloid (25-35);Aβ25-35;Gly-Ser-Asn-Lys-Gly-Ala-Ile-Ile-Gly-Leu-Met;β-Amyloid peptide(25-35);BETA-AMYLOID;BETA-AMYLOID (25-35);AMyloid b-Protein (25-35);AMyloid beta (25-35) huMan;Amyloid beta-peptide(25-35);1: PN: US20030114510 SEQID;-Amyloid(25-35);25-35) TRIFLUOROACETATE;AMYLOID BETA-PROTEIN (HUMAN;A;H-Gly-Ser-Asn-Lys-Gly-Ala-Ile-Ile-Gly-Leu-Met-OH;β-Amyloid (25-35)
SMILES: CCC(C)C(C(=O)NC(C(C)CC)C(=O)NCC(=O)NC(CC(C)C)C(=O)NC(CCSC)C(=O)O)NC(=O)C(C)NC(=O)CNC(=O)C(CCCCN)NC(=O)C(CC(=O)N)NC(=O)C(CO)NC(=O)CN
Formula: C45H81N13O14S
M.Wt: 1060.2683
Purity: >98%
Sotrage: 2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO
Description: β-Amyloid (25-35) (Amyloid beta-peptide (25-35), Aβ25-35, β-Amyloid peptide (25-35)) , a sequence GSNKGAIIGLM, is a highly toxic synthetic derivative of Amyloid beta-peptide (Aβ-peptides) which forms fibrillary aggregates. β-Amyloid (25-35) is involved in the pathogenesis of Alzheimer's disease.
In Vivo: Rats are injected with Aβ25–35 peptide intracerebroventricularly and compound Danshen (CDS) are subsequently administered once daily for 23 days. Rats’ behavior is monitored using Morris water maze and passive avoidance. Real time PCR and Western blotting are used in determining amyloid precursor protein (APP), β-site APP cleaved enzyme-1(BACE1), Presenilin-1 (PS1), Insulin-degrading enzyme (IDE) and neprilysin (NEP) in hippocampus. The Alzheimer' s disease (AD) model group present with spatial learning and memory impairments. CDS and donepezil administration significantly ameliorate the Aβ25–35 peptide-induced memory impairment in both Morris water maze (P < 0.05) and passive avoidance task (P < 0.01) compared to the AD model group[3].
In Vitro: The amino acid sequence of Aβ(25-35) peptide is NH2-Gly-Ser-Asn-Lys-Gly-Ala-Ile-Ile-Gly-Leu-Met-COOH, where the first Gly represents the amino acid 25 and the last Met represents the amino acid 35. Amyloid beta-peptide(25-35) is also investigated in gel state for the first time. Comparative studies are also carried out using vibrational absorption and ECD. The conformational preference of Aβ(25-35) peptide film is also investigated using vibrational absorption and VCD spectroscopy[1]. Amyloid beta-peptide(25-35) induces apoptotic effects on isolated brain mitochondria and the redox state of methionine-35, plays a key role in the induction of programmed cellular death pathways and toxic events[2].
Cell Assay: Cell viability is determined by a modified MTS assay, which is based on the conversion of Tetrazolium salt by mitochondrial dehydrogenase to a formazan product spectrophotometrically measurable at 490 nm. PC12 cells are plated in 96-well plates at a density of 10 000 cells/well and maintained for 16 h in complete medium. Cells are then incubated in the absence (control) and presence of 40 μM Aβ(31-35) and Aβ(25-35) with reduced, oxidized and norleucine-substituted methionine-35 staurosporine 10 μM is used as positive control of 100% of cellular death. After 48 h of peptide-incubation, 20 μL of MTS reagent (2.0 mg/mL) is added to each well. The cells are then incubated for 30-45 min at 37 °C in a 5% CO2 incubator. The reaction is stopped by adding 25 μL of 10% SDS. The plates are read with a microplate reader at 490 nm. Each data point is obtained using a triplet-well assay[2].
Animal Administration: Rats[3] Fifty-four Male Sprague-Dawley rats (2 months old, 300-350 g) are used. Amyloid beta-peptide(25-35) is dissolved in sterile distilled water at a concentration of 1 mg/mL as a stocking solution. Animals are infused with 5 μL/side of sterile distilled water (control), aggregated Aβ25-35 (2 μg/μL), into bilateral cerebral lateral ventricles at a rate of 1 μL/min; the needle is left in place for 5 min. Then the needles are removed and rats are kept on a warm pad until they are awakened. To determine the neuroprotective effect on AD rats, the Aβ25-35 treated rats are treated with CDS of different doses and Donepezil once daily for 23 days (including duration of behavior test). Experiment is performed to test the effect of CDS on Aβ25-35-induced memory impairment using Morris water-maze and step-through passive avoidance tasks. Specifically, all of the rats are randomly divided into 6 groups for the experiment: (a) Vehicle 1 (for Aβ25-35)+vehicle 2 (for CDS and Donepezil), (b) Aβ25-35+vehicle 2, (c) Aβ25-35+CDS (130 mg/kg), (d) Aβ25-35+CDS (260 mg/kg), (e) Aβ25-35+CDS (520 mg/kg), (f) Aβ25-35+Donepezil (0.5 mg/kg). One day after cerebroventricular microinfusions of Aβ25-35 (10 μg/side) or its vehicle, rats are treated (i.g.) with CDS or Donepezil or vehicle 2, once daily for 14 days prior to the beginning of Morris water maze, followed by passive avoidance task.
References: [1]. D'Ursi AM, et al. Solution structure of amyloid beta-peptide (25-35) in different media. J Med Chem. 2004 Aug 12;47(17):4231-8. [2]. Clementi ME, et al. Abeta(31-35) and Abeta(25-35) fragments of amyloid beta-protein induce cellular death throughapoptotic signals: Role of the redox state of methionine-35. FEBS Lett. 2005 May 23;579(13):2913-8. [3]. Liu M, et al. Cognitive improvement of compound danshen in an Aβ25-35 peptide-induced rat model of Alzheimer's disease. BMC Complement Altern Med. 2015 Oct 23;15:382.
MSDS
Cat. No. Product name Field of application
DC12145 DLinDMA DLinDMA is a key lipid component of stable nucleic acid lipid particles as a benchmark.
DC40169 DMG-PEG2000 DMG-PEG 2000 is used for the preparation of liposome for siRNA delivery with improved transfection efficiency in vitro. DMG-PEG 2000 is also used for the lipid nanoparticle for an oral plasmid DNA delivery approach in vivo through a facile surface modific
DC45611 DMPC 1,2-Dimyristoyl-sn-glycero-3-phosphocholine (DMPC) is a synthetic phospholipid used in liposomes. 1,2-Dimyristoyl-sn-glycero-3-phosphocholine is used for the study of lipid monolayers and bilayers.
DC70000 Lysyllysyllysine Lysyllysyllysine is a cationic moietie that may be used in the construction of gene delivery vectors and DNA nanoparticles.
DC33580 DODMA DODMA, also known as MBN 305A is a a cationic lipid containing the unsaturated long-chain (18:1) oleic acid inserted at both the sn-1 and sn-2 positions. It has been used in the composition of lipospomes formulated as stable nucleic acid lipid particles that can encapsulate siRNA or other small molecules to be used for drug delivery
DC33635 DODAP DODAP, also known as 1,2-Dioleoyl-3-dimethylammonium-propane, is a cationic lipid. It has been used as a component in liposomes that can be used to encapsulate siRNA, immunostimulatory oligodeoxynucleotides, antisense oligonucleotides, or chemotherapeutic agents for in vitro and in vivo delivery.
DC59010 C14-4 (C14-494,Lipid B-4,Lipid B4) C14-4 (C14-494,Lipid B-4,Lipid B4) is a novel ionizable lipid with the highest T-cell transfection efficiency and low cytotoxicity.The C14-4 ionizable lipid has been explored for CAR-T therapy.To screen the excellent formulations for mRNA delivery, a lipid library of 24 ionizable lipids was constructed to make iLNPs, which were used to deliver luciferase mRNA into Jurkat cells.[115] The optimal iLNPs formulation was C14-4 iLNPs (C14-4 ionizable lipid, DOPE, chol, and PEG at a molar ratio of 35%, 16%, 46.5%, and 2.5%) (Figure 6c). The optimal dose of luciferase mRNA for C14-4 iLNPs was 30 ng. Compared with electroporated CAR T cells, the CAR T cells engineered via C14-4 iLNPs showed potent cancer-killing activity when they were cocultured with Nalm-6 acute lymphoblastic leukemia cells. To obtain a safer and more effective CAR mRNA delivery vehicle, the orthogonal design provided 256 potential formulations, and 16 representative iLNPs formulations were evaluated.Through evaluating the safety, delivery efficiency, and transfection efficiency of 16 iLNPs, the formulation B10 (C14-4 ionizable lipid, DOPE, chol, PEG at a molar ratio of 40%, 30%, 25%, and 2.5%) was screened out as the optimal performing formulation. The luciferase expression based on B10 formulation was increased threefold than the initial formulation. Reducing the accumulation and clearance of iLNPs in the liver can increase the expression of CAR mRNA in T cells, further improving the therapeutic effect of CAR-T. Studies have shown that cholesterol analogs can alter the mechanisms of intracellular circulation and enhance the delivery of mRNA, which may be related to the reduced recognition of iLNPs by the Niemann Pick C1 (NPC1) enzyme.The addition of a hydroxyl group to various locations in the cholesterol molecule can alter the binding kinetics between the modified cholesterol and NPC1, and reduced NPC1 recognition of cholesterol. The results showed that replacement of 25% and 50% 7 α-hydroxycholesterol for cholesterol in iLNPs improved mRNA delivery to primary human T cells in vitro by 1.8-fold and twofold, respectively.C14-4 is one of the ionizable lipids to efficiently deliver mRNA to Jurkat cells or primary human T cells. It will effectively promote the development of mRNA delivery by iLNPs for CAR-T therapy.
DC33636 DOTAP DOTAP, also known as 1,2-Dioleoyl-3-trimethylammoniumpropane, is a cationic liposome-forming compound used for transfection of DNA, RNA, and other negatively charged molecules into eukaryotic cells. It has been used in gene delivery vectors for gene ther
DC58047 DSPE-PEG 2000 PEG2000-DSPE is used for creating micelles that are able to carry drugs with low solubility.
DC31000 LP-01 LP-01 is an ionizable cationic amino lipid (pKa = ~6.1). It has been used in the generation of lipid nanoparticles (LNPs). LNPs containing LP-01 and encapsulating both Cas9 mRNA and modified single-guide RNA (sgRNA) for the transport protein transthyretin (Ttr) induce gene editing in liver cells in mice in a dose-dependent manner resulting in reduced serum Ttr levels for at least 12 months.
X
Products are chemical reagents for research use only and are not intended for human use. We do not sell to patients.
Site Map|Privacy PolicyCopyright © 2018-2020 All Rights Reserved. Technical Support:KuuJia