A practical reference on CJC-1295: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2025-11-09 and is reviewed periodically as new material appears.
The two variants differ dramatically in how long they persist in circulation. The form lacking the albumin-binding group has a plasma half-life measured in tens of minutes, comparable to the natural hormone fragment. The version carrying the drug affinity complex binds albumin and shows a half-life of roughly six to eight days in human studies. That figure comes from small trials that tracked hormone levels over extended periods. The physiological consequences of sustained versus pulsatile stimulation are still debated and the literature does not settle the point.
Lyophilized peptide powder is comparatively stable when kept dry, cold, and protected from light. Once dissolved, the molecule is vulnerable to deamidation, oxidation, and aggregation, with the rate depending on pH, buffer composition, and temperature. Alkaline conditions and repeated freeze-thaw cycles accelerate loss of the intact peptide. The methionine present in the native sequence is a known oxidation site, which is one reason it was replaced in the modified fragment. Suppliers typically recommend cold storage of solutions and use within a short window.
Analytical confirmation usually relies on reversed-phase high-performance liquid chromatography for purity and on liquid chromatography coupled to mass spectrometry for identity. Mass data reveal the expected molecular mass and can flag truncated or oxidized species. Amino acid analysis and peptide mapping provide sequence-level verification. Immunoassays are used in some biological matrices, but antibodies raised against one releasing-hormone analog may cross-react with another. Reported purity figures depend heavily on the method used, so comparisons between suppliers require matching the analytical approach.
The dividing feature between the two forms is a maleimide-based drug affinity complex, abbreviated DAC. In the DAC-bearing version, a linker attaches the peptide to serum albumin after administration, and that association slows removal from plasma. The version lacking DAC appears in catalogs as MOD GRF(1-29) or tetrasubstituted GRF(1-29). Because informal writing treats both as one item, comparisons drawn from such sources routinely blend measurements taken from two molecules with substantially different behavior.
Four amino acid substitutions separate the modified backbone from the parent GRF(1-29) sequence. These changes reduce recognition by dipeptidyl peptidase IV and related proteases, extending the interval before degradation. Development work in this area sought longer-acting GHRH analogs for endocrine investigation. Published descriptions treat the substitution set as a defining property of the core sequence, while the albumin-binding linker is described separately as an optional addition to that same backbone.
| Property | Value | Notes |
|---|---|---|
| Molecular mass | Approximately 3.4 to 3.6 kDa | Depends on whether the affinity complex is attached |
| Appearance | White to off-white lyophilized powder | Freeze-dried solid, often in a sealed vial |
| Solubility | Soluble in water and aqueous buffers | Dissolution rate varies with pH and buffer salt |
| Typical storage | Below minus 20 degrees Celsius, dry and dark | Dissolved material is usually kept cold and used promptly |
| Common analytical methods | Reversed-phase HPLC and mass spectrometry | Peptide mapping and amino acid analysis add sequence detail |
CJC-1295 is a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. Its sequence corresponds to the first twenty-nine residues of human GHRH, with four substitutions that slow enzymatic breakdown. Early descriptions placed the compound in research on growth hormone deficiency and related conditions, and later literature groups it with the long-acting GHRH analogs. The name appears in both laboratory and popular fitness writing, where it sometimes labels chemically different peptides.
Two related peptides circulate under the CJC-1295 label, and they differ mainly in how long they persist in circulation. The version carrying a drug affinity complex includes a maleimidopropionic acid linker that forms a covalent bond with serum albumin. The other version, usually written as modified GRF(1-29) or tetrasubstituted GRF(1-29), lacks that linker and is cleared quickly. Mixing the two produces inconsistent readings of published half-life values, because the linker rather than the receptor-facing sequence drives most of the difference.
The core sequence keeps the receptor-binding region of GHRH while replacing four positions that are vulnerable to dipeptidyl peptidase-4 and other proteases. Substitutions at positions 2, 8, 15, and 27 raise metabolic stability relative to the natural hormone. The N-terminal residues remain essential for activity, so changes there generally lower potency. Molecular weight sits near 3368 daltons for the tetrasubstituted analog without the linker, while the albumin-binding form is heavier because of the added maleimide group.
Purity is most often assessed by reversed-phase high-performance liquid chromatography, reported as a percentage of total peak area. Identity is confirmed by mass spectrometry, which yields a molecular ion consistent with the expected sequence. Amino acid analysis and peptide mapping provide additional characterization. Reported purity values are method-dependent, so figures from different laboratories are not always directly comparable without details of column, gradient, and detection wavelength.
Peptide degradation proceeds mainly through hydrolysis, oxidation of methionine, and deamidation of asparagine or glutamine residues. The maleimide group on the albumin-binding variant can also react with thiols or hydrolyze in aqueous media. Because these pathways accelerate with temperature and pH extremes, handling conditions strongly influence measured stability. Stability data in the public literature are limited and often generated under differing conditions, so general statements about shelf life should be read as approximate.
Research material is normally supplied as a freeze-dried powder in sealed vials. In that state the peptide is comparatively robust, but prolonged exposure to warmth, moisture, or light accelerates degradation. Storage at minus twenty degrees Celsius or lower, with desiccant and protection from light, is the commonly described practice. Vials should be allowed to reach room temperature before opening to limit condensation on the powder. Moisture uptake during handling is a recognized source of variability in later measurements.
Batch-to-batch consistency depends on solid-phase peptide synthesis and subsequent purification. Coupling efficiency, resin choice, and cleavage conditions all affect the final profile. Counter-ion content and moisture can shift the apparent mass of a batch. Documentation typically includes a certificate of analysis with chromatograms and spectra. Independent verification by a second laboratory is sometimes requested. Whether a given certificate reflects the actual vial contents depends on chain of custody. Analytical methods themselves carry uncertainty that should be stated alongside results.
Lyophilized material is typically stored at minus twenty degrees Celsius or lower. Keeping the vial dry and protected from light preserves peptide integrity. Repeated freeze-thaw cycles can cause aggregation or loss of activity. Once dissolved, solutions are generally kept at two to eight degrees Celsius. Stability data for reconstituted solutions vary, and long-term behavior is not fully established. Working aliquots reduce the number of times a stock container is opened.
Reverse-phase high-performance liquid chromatography is the standard tool for purity assessment. The technique separates the target peptide from truncated or modified byproducts. Mass spectrometry confirms molecular weight and supports sequence verification. Electrospray ionization and matrix-assisted laser desorption are both used. Amino acid analysis provides an independent check on composition. Purity values are commonly reported as area percentage from the chromatogram. Residual trifluoroacetate and water content are also measured in many quality programs.
== Honours and awards == Doctorate honoris causa, Politics, Moscow State Institute of International Relations, Moscow, Russian Federation. Doctorate honoris causa, Duncan of Jordanstone College, University of Dundee, Scotland, United Kingdom. Ehrenbürgerschaft, Honorary Citizenship, awarded by the Christian Albrecht University, Kiel, Germany. Орден Дружбы, Order of Friendship presented by President Vladimir Putin of the Russian Federation. Нагрудный знак "Почетному полярнику", Honorary Polar Explorer Medal, Aspol, Moscow, Russian Federation. མངའ་བདག་དཔལ་གྱི་འཁོར་ལོ། Nga Dap Pel Gi Khorlo, The Order of the Druk Gyalpo, presented by King Jigme Khesar Namgyel Wangchuck of Bhutan. Silver Medal of Russian Geographic Society, awarded by the RGS, Russian Federation. Medal of Honour, granted by the Granada Dance and Music International Festival, Spain. Knight of the Order of St John by Queen Elizabeth II. The winner of the national award "Crystal Compass". (Russia)
homeodomain A nucleic acid-binding domain, typically 60 amino acids in length, found near the C-terminus of certain eukaryotic proteins, characterized by a highly conserved helix-turn-helix motif that binds with strong affinity to the backbone of specific recognition sequences in DNA or RNA molecules. A protein may have one or more homeodomains, each of which is specific to a different recognition sequence. Many homeodomain-containing proteins function as transcription factors by binding to sequences within promoters and blocking or recruiting other proteins, such as RNA polymerase or cofactors of the transcription initiation complex. Homeodomains are the translated versions of homeoboxes, though the terms are often used interchangeably.
It can be difficult to tell whether a trait has been lost and then re-evolved convergently, or whether a gene has simply been switched off and then re-enabled later. Such a re-emerged trait is called an atavism. From a mathematical standpoint, an unused gene (selectively neutral) has a steadily decreasing probability of retaining potential functionality over time. The time scale of this process varies greatly in different phylogenies; in mammals and birds, there is a reasonable probability of a gene's remaining in the genome in a potentially functional state for around 6 million years.
The communication channel is one-way, since the long antennas needed to transmit VLF or ELF waves cannot fit on a submarine. VLF transmitters use miles long wire antennas like umbrella antennas. A few nations use ELF transmitters operating around 80 Hz, which can communicate with submarines at lower depths. These use even larger antennas called ground dipoles, consisting of two ground (Earth) connections 23–60 km (14–37 miles) apart, linked by overhead transmission lines to a power plant transmitter.
Sources: en.wikipedia.org
Collagen alpha-1(VII) chain is a protein that in humans is encoded by the COL7A1 gene. It is composed of a triple helical, collagenous domain flanked by two non-collagenous domains, and functions as an anchoring fibril between the dermal-epidermal junction in the basement membrane. Mutations in COL7A1 cause all types of dystrophic epidermolysis bullosa, and the exact mutations vary based on the specific type or subtype. It has been shown that interactions between the NC-1 domain of collagen VII and several other proteins, including laminin-5 and collagen IV, contribute greatly to the overall stability of the basement membrane.
Lex Politica also represented the non-profit arm in the US of Victor Orban's Danube Institute. Gober was also involved in the 2025 redistricting process. Republican mapmaker Kincaid testified that the Republican National Committee retained Gober to represent the Texas Republican congressional delegation and that Gober conveyed the delegation's requests to him during the map-drawing process. Gober's congressional campaign subsequently listed his redistricting work among his accomplishments, stating that he had helped deliver a redistricting plan that strengthened the Republican majority and describing the result as having "Secured Five New Republican Seats." Gober won the Republican nomination for Texas’ redrawn 10th Congressional District with 51.2 percent of the vote, narrowly avoiding a runoff. Gober is running on a platform of strict border security, “America First” economic policies, and the “weaponization of government” against conservative causes. The incumbent is Republican Michael McCaul, who was re-elected in 2024 with 63.6% of the vote. McCaul is not seeking reelection in the redrawn district, which gave 60.5% of the vote to Donald Trump and 58.4% to Ted Cruz in 2024.
Cryptogenic organizing pneumonia (COP), formerly known as bronchiolitis obliterans organizing pneumonia (BOOP), is an inflammation of the bronchioles (bronchiolitis) and surrounding tissue in the lungs. It is a form of idiopathic interstitial pneumonia. It is often a complication of an existing chronic inflammatory disease such as rheumatoid arthritis, dermatomyositis, or it can be a side effect of certain medications such as amiodarone. COP was first described by Gary Epler in 1985. The clinical features and radiological imaging resemble infectious pneumonia. However, diagnosis is suspected after there is no response to multiple antibiotics, and blood and sputum cultures are negative for organisms.
Sources: en.wikipedia.org
=== Valuation === Theranos raised millions of dollars in its first years. In 2004, Theranos was based in a rented basement near the Stanford campus. By December 2004, the company had raised more than $6 million from investors at a valuation of $30 million. The company had about $45 million total fundraising after Series B and Series C funding in 2006. Theranos raised an additional $45 million in 2010 at a valuation of $1 billion. The company had significant news coverage starting in September 2013 after profiles in the San Francisco Business Times and The Wall Street Journal. By 2014, Theranos had raised more than $400 million with an estimated value of $9 billion. Theranos raised more than $700 million from venture capitalists and private investors, resulting in a $10 billion valuation at its peak in 2013 and 2014. In 2016, Forbes revised the estimated net worth of the company to $800 million taking into account the $724 million of capital raised. Between 2004 and 2016, the amount of available cash from investors for private equity/venture capital firms to invest in companies grew from $400 billion to $1.5 trillion. It was a period of plentiful capital available where investors were pressured to find investment targets to deploy capital on. In the Theranos case, insufficient due diligence and fraudulent business practices led to the losses for investors. In May 2017, participating shareholders provided a release of any potential claims against Theranos in exchange for shares of the company's new preferred stock.
Protein biosynthesis or protein synthesis (also known as proteosynthesis) is a core biological process, occurring inside cells, balancing the loss of cellular proteins (via degradation or export) through the production of fresh proteins. Proteins perform a number of critical functions as enzymes, structural proteins or hormones. Protein synthesis is a very similar process for both prokaryotes and eukaryotes but there are some distinct differences. Protein synthesis can be divided broadly into two phases: transcription and translation. During transcription, a section of DNA encoding a protein, known as a gene, is converted into a molecule called messenger RNA (mRNA). This conversion is carried out by enzymes, known as RNA polymerases, in the nucleus of the cell. In eukaryotes, this mRNA is initially produced in a premature form (pre-mRNA) which undergoes post-transcriptional modifications to produce mature mRNA. The mature mRNA is exported from the cell nucleus via nuclear pores to the cytoplasm of the cell for translation to occur. During translation, the mRNA is read by ribosomes which use the nucleotide sequence of the mRNA to determine the sequence of amino acids. The ribosomes catalyze the formation of covalent peptide bonds between the encoded amino acids to form a polypeptide chain. Following translation the polypeptide chain must fold to form a functional protein; for example, to function as an enzyme the polypeptide chain must fold correctly to produce a functional active site.
== Safety profile == Apart from procedural pain, some common post-treatment adverse events (AEs) of MNs include temporary discomfort, erythema (skin redness), and edema. Pinpoint bleeding, itching, irritation, and bruising are also possible in some cases. However, most of the adverse side effects are not long-lasting and could be resolved spontaneously within 24 hours after the treatment, making MNs a rather safe tool. Photoprotection and minimal exposure to chemicals irritants are often advised for an effective recovery and lowered chance of skin inflammation. Severe risks may be possible if there are technical errors during the procedure. For example, the usage of non-sterile tools might result in post-inflammatory hyperpigmentation, systemic hypersensitivity, local infections, etc. Moreover, if excess pressure is used over a bony prominence, it could lead to "Tram-track scarring". But this could be avoided by using smaller needles and prevent over-pressurizing on top of these areas. In addition, if the patient is allergic to the either the drug used or the material of MNs, contact dermatitis is possible. Therefore, clinicians should be cautious towards patients with high risks of allergy.
== Cause == Most skin injury types can contribute to scarring. This includes burns, acne scars, chickenpox scars, ear piercing, scratches, surgical incisions, and vaccination sites. According to the US National Center for Biotechnology Information, keloid scarring is common in young people between the ages of 10 and 20. Studies have shown that those with darker complexions are at a higher risk of keloid scarring as a result of skin trauma. They occur in 15–20% of individuals with sub-Saharan African, Asian, or Latino ancestry, significantly less in those of a Caucasian background. Although it was previously believed that people with albinism did not get keloids, a recent report described the incidence of keloids in Africans with albinism. Keloids tend to have a genetic component, which means one is more likely to have keloids if one or both of their parents have them. No single gene has yet been identified as a causing factor in keloid scarring, although several susceptibility loci have been discovered, most notably in Chromosome 15.
Sources: en.wikipedia.org
The version carrying the affinity complex bears a maleimide group that binds serum albumin, which extends its circulation time to several days. The version without it lacks this group and clears within roughly half an hour. The two are chemically related but behave very differently once in the body.
In common usage the name without the affinity complex is often equated with MOD GRF 1-29, a fragment carrying four stabilizing substitutions. Strictly speaking, the term originally referred to the albumin-binding version. The overlap in naming causes frequent ambiguity in both informal and technical writing.
Reversed-phase chromatography separates the peptide from related impurities and yields a purity estimate. Mass spectrometry confirms the molecular mass and detects modifications such as oxidation. Sequence-level checks rely on peptide mapping or amino acid analysis when stronger confirmation is needed.
No. It is a laboratory-synthesized analog built on a fragment of the natural hormone. The natural peptide is shorter-lived and lacks the stabilizing substitutions found in the synthetic version.