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ACE 031 peptide is an innovative research-based peptide molecule that has undergone targeted modification and optimization of the ActRIIB receptor. Its scientific design aims to precisely regulate key signaling pathways such as myostatin (GDF-8). By highly selectively binding and blocking these signals, it can gently and effectively promote protein synthesis and healthy growth of skeletal muscle, thereby enhancing muscle quality and strength. This molecule has demonstrated excellent targeting and specificity in preclinical studies, and its mechanism of action provides a new scientific perspective and potential path for supporting muscle health, improving body composition, and metabolic status. Currently, related research is focusing on exploring its application possibilities in specific health fields, representing an important frontier advancement in biotechnology in the fields of metabolism and body function regulation. This lays a solid research foundation for the development of related health support solutions in the future.
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ACE 031 Peptide COA
ACE 031 peptide(Myostatin inhibitory peptide 7) is a linear polypeptide composed of 24 amino acids. Its core function is to inhibit the inhibitory effects of myostatin and other negative regulatory factors on muscle growth by binding to them. This enables muscle growth. The manufacturing process involves chemical synthesis technology, purification techniques, and strict quality control. The following analysis is conducted from three dimensions: manufacturing principle, process flow, and technical challenges.
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Manufacturing Principle: The Core Logic of Chemical Synthesis Technology
The manufacturing of ACE-031 relies on solid-phase peptide synthesis technology (SPPS), which was invented by Merrifield in 1963 and for which he received the Nobel Prize in Chemistry in 1984. The core logic of this technology is to fix the carboxyl terminus of amino acids through covalent bonds onto insoluble resin particles. Through a series of "deprotection - activation - condensation" steps, the peptide chain is gradually extended. Specifically for ACE-031:
Resin selection: Choose resins suitable for C-terminal fixation (such as Wang resin or Rink amide resin), ensuring that the carboxyl group of the first amino acid (Ala) forms a stable covalent bond with the resin.
Protecting group strategy: Use Fmoc (9-fluorenylmethoxycarbonyl) or Boc (tert-butoxycarbonyl) to protect amino groups, and side chain protecting groups (such as Trt protecting the Arg side chain) to prevent side reactions. For example, the Fmoc protecting group needs to be removed under a weak alkaline condition (such as 20% piperidine/DMF), while the Boc protecting group requires treatment with a strong acid (such as TFA).
Coupling reagent: Use activating agents such as HBTU, HATU, or DCC/HOBt to promote the formation of peptide bonds between amino acids. For example, when synthesizing the Arg-Gln bond, the reaction time (usually 1-2 hours) and temperature (room temperature to 40°C) need to be precisely controlled to avoid racemization.
Process flow: Fine control from raw materials to finished products
The manufacturing process of ACE-031 can be divided into five key stages:
The resin is swollen in DMF for 30 minutes, and then reacts with the first amino acid (Fmoc-Ala-OH) in the coupling agent (such as HBTU/DIPEA) for 2 hours to form the initial peptide-resin complex.
The steps of "deprotection - washing - activation - condensation - washing" are repeated using an automated synthesis instrument, gradually adding the remaining 23 amino acids. For example, when synthesizing the Trp-Arg bond, the side chain protecting group of Trp (such as Boc) needs to be optimized to avoid interfering with the condensation of Arg.
The peptide-resin complex is treated with TFA/TIS/H₂O (95:2.5:2.5) for 2 hours, cutting the peptide chain from the resin and removing all protecting groups. After cutting, the peptide needs to be precipitated with cold ether, and the crude product is collected by centrifugation.
The purified peptide solution is freeze-dried to obtain a white powder-like product. It is sealed and stored under -20°C, in a dark and dry environment to prevent degradation.
The purified polypeptide solution is freeze-dried to obtain a white powder-like product. It is then sealed and stored under -20℃, in a dark and dry environment to prevent degradation.
Technical challenges: Key control points in the manufacturing process
Side reaction control
In solid-phase synthesis, impurities such as missing peptides and inserted peptides are prone to occur. For example, when synthesizing the Gln-Asn bond, the reaction pH (7.5-8.0) needs to be controlled to avoid asparagine translocation. By optimizing the coupling agent (such as using COMU instead of HBTU), the proportion of by-products can be significantly reduced.
Long peptide synthesis efficiency
ACE-031 is a 24-peptide, and the risk of by-product accumulation during the synthesis process is relatively high. The "fragment condensation method" (i.e., synthesizing 5-10 peptide fragments first, and then connecting them by liquid-phase method) can increase the total yield. For example, ACE-031 is divided into Ala-Trp-Arg (fragment 1), Gln-Asn-Thr-Arg (fragment 2), etc., and each fragment is synthesized separately before splicing.
Quality control standards: The finished product must meet the following indicators:
Purity: The main peak area percentage detected by HPLC is ≥ 98%, and the single impurity is ≤ 0.5%;
Content: The error of amino acid composition analysis is ≤ ± 15%;
Solubility: It is easily soluble in water or DMSO, with a concentration of ≥ 10 mg/mL without precipitation;
Stability: The purity of ACE-031 does not decrease by more than 2% when stored at -20°C for 3 years.
Application and Market: Research-driven manufacturing demands
ACE 031 peptide is mainly used in muscle atrophy diseases (such as Duchenne muscular dystrophy), muscle growth and repair research. Its manufacturing needs to strictly follow the research-grade standards. Currently, the main suppliers worldwide (such as Shanghai Hong Peptide Biotechnology, MedChemExpress) provide custom services from crude product to 98% purity, and ensure product quality through HPLC, MS, amino acid analysis, etc. For example, Hong Peptide Biotechnology's ACE-031 product has passed SGS certification and meets the requirements of SLAS guidelines, and can be stably supplied to global research institutions.
ACE 031 peptide (Myostatin inhibitory peptide 7) is a recombinant protein that inhibits the activity of myostatin and other negative regulators by binding to them, thereby promoting muscle growth. Its core application is centered around scientific research experiments, and strict adherence to the protocols for dissolution, preparation, administration, and storage is required. The following will analyze these four key aspects.
Dissolution Method: Selection of Solvent and Operating Specifications
The dissolution of ACE-031 requires the selection of an appropriate solvent based on its physical and chemical properties. This polypeptide is a white powder, with a molecular weight of 2956.49. The isoelectric point is unknown but can be inferred from the amino acid composition regarding its solubility. The following steps are commonly used in the experiment:
Solvent selection
Try using sterile water or PBS (pH 7.4) first. If the solubility is insufficient, adjust according to the properties of the polypeptide. For ACE-031, if it contains basic amino acids (such as Arg, Lys), try 10%-30% acetic acid; if it contains acidic amino acids (such as Asp, Glu), use 13% ammonia water. For example, in a certain study, ACE-031 was dissolved in DMSO, then diluted with PBS to the target concentration to ensure that the final DMSO concentration was below 1% to avoid cytotoxicity.
Key operation points
Before dissolution, restore the polypeptide to room temperature to avoid moisture absorption; quickly weigh after opening the bottle cap to reduce exposure time; use ultrasonic or heating (≤ 50℃) to assist dissolution, but avoid high temperatures causing denaturation; after dissolution, aliquot and store to avoid repeated freezing and thawing.
Concentration preparation: Experimental requirements and dosage calculation
The preparation concentration of ACE-031 needs to be determined based on the experimental model (such as cells, animals) and the administration method (such as injection, gavage). The common preparation schemes are as follows:
Animal experiment
Taking the intramuscular injection of posterior cranial fossa muscles in rats as an example, ACE-031 was prepared at a concentration of 5 mg/kg body weight. If the average weight of the rats was 20 g and the dosage volume was 100 μL, then the dosage for a single rat = 5 mg/kg × 0.02 kg = 0.1 mg, and the working solution concentration = 0.1 mg/0.1 mL = 1 mg/mL. In the experiment, it is usually necessary to prepare an additional 1-2 times the amount of animals to compensate for losses.
Cell experiment
In the C2C12 myotube differentiation model, the concentration range of ACE-031 is 10-100 nM. For example, preparing a 10 nM working solution: Take 1 mg of ACE-031 (molecular weight 2956.49), dissolve it in 1 mL DMSO to obtain a 1 mM stock solution, and then dilute it 100,000 times with the culture medium to 10 nM.
Administration methods: Route selection and operational details
The administration method of ACE-031 needs to be selected based on the experimental purpose and animal model. Common routes include:
Subcutaneous injection
Used for long-term administration (e.g., 3 times per week for 5 weeks) to maintain stable blood drug concentration. For example, in a model of muscle atrophy in mice, subcutaneous injection of ACE-031 (10 mg/kg) significantly increased muscle mass.
Local injection
Targeted to specific muscle groups (such as posterior cranial fossa muscles), administered precisely using a microliter syringe. During the operation, the animal needs to be anesthetized (e.g., with 2.5% Avertin solution), the target muscle needs to be exposed, the needle is inserted vertically and then slowly injected to avoid fluid leakage.
Cell administration
In in vitro experiments, ACE-031 is directly added to the culture medium, ensuring serum-free conditions to avoid protein binding. For example, in a proliferation experiment of muscle satellite cells, after treatment with ACE-031 (50 nM) for 48 hours, the cell proliferation rate is detected by EdU staining.
Storage conditions: Stability maintenance and precautionsn
The storage conditions of ACE-031 directly affect its activity. The following principles should be followed:
Short-term storage
The dissolved solution is recommended to be aliquoted into sterile EP tubes and stored at -20°C or -80°C, avoiding repeated freeze-thaw cycles (≤3 times). For example, in a certain study, the ACE-031 solution stored at -80°C for 6 months still maintained an activity of ≥90%.
Long-term storage
The freeze-dried powder should be stored sealed at -80°C, with desiccant placed in the desiccator to prevent moisture absorption. Unused powder after opening the bottle should be used up as soon as possible to avoid exposure to a humid environment.
Transport conditions
Transport with dry ice, ensuring the temperature ≤ -70°C, avoiding vibration that may cause protein denaturation. After receiving, immediately check the integrity of the packaging and re-dissolve according to the instructions.
FAQ
What does ACE-031 do?
ACE-031 is a soluble form of activin receptor type IIB (ActRIIB). ACE-031 promotes muscle growth by binding to myostatin and other negative regulators of muscle mass.
Is ACE-031 a myostatin inhibitor?
ACE-031 is an inhibitor of myostatin and other related, naturally occurring proteins that limit muscle growth. The experimental drug acts as a decoy receptor for these proteins, keeping them away from muscle fibers. It's designed to allow for better muscle growth and repair in DMD.
What are the benefits of ACE peptides?
ACE plays a crucial role in the renin-angiotensin system, converting angiotensin I to angiotensin II, a potent vasoconstrictor that elevates blood pressure8. Additionally, ACE is also able to inactivate bradykinin, a vasodilatory peptide that helps lower blood pressure.
What is the difference between ACE 031 and Ace 083?
ACE-083 is a modified form of ACE-031 and is designed to act locally to prevent systemic side effects. In Phase 1 trials, it improved local muscle mass but not the strength in post-menopausal women.
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