Everything below concerns lyophilized powder. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-09-19. Numbers and descriptions here follow the published literature rather than marketing material.
CJC-1295 is a synthetic peptide designed to mimic growth hormone-releasing hormone (GHRH), the endogenous signal that prompts the pituitary gland to release growth hormone. The compound is a modified fragment of the natural hormone, spanning the first twenty-nine amino acids of GHRH with several substitutions that slow enzymatic breakdown. Two variants circulate in research settings: one carrying a drug affinity complex (DAC) and one without it. The DAC-free form is frequently labelled Mod GRF(1-29) in catalogs and discussion forums.
The peptide binds GHRH receptors on somatotroph cells within the anterior pituitary, triggering a signalling cascade that increases growth hormone secretion. Its improved resistance to dipeptidyl peptidase IV degradation distinguishes it from the parent hormone. In the DAC-bearing version, a maleimide group reacts with a cysteine residue on serum albumin, forming a covalent bond that keeps the peptide in circulation far longer. That albumin attachment is the central design feature separating the two research variants.
CJC-1295 acts at the growth hormone-releasing hormone receptor, a G-protein-coupled receptor found on somatotroph cells in the anterior pituitary. Binding triggers a rise in cyclic AMP and calcium entry, which promotes release of stored growth hormone. Because the peptide mimics the body's own releasing hormone, it amplifies existing secretory pulses rather than driving continuous output. The size of the response therefore depends partly on the subject's own hormonal rhythm and feedback state.
The attached maleimide group explains the unusual duration of the DAC version. After injection it reacts with the thiol of cysteine-34 on serum albumin, forming a stable covalent bond. The resulting conjugate is too large for rapid kidney filtration and is shielded from many peptidases. Reported half-lives for this form reach several days, whereas the version without the group is cleared in roughly half an hour. That gap is the main pharmacological difference between the two.
| Property | Value | Notes |
|---|---|---|
| Molecular weight (with DAC) | ~3647 Da | Calculated from the full amino acid sequence |
| Molecular weight (without DAC) | ~3368 Da | Mod GRF(1-29) variant |
| Appearance | White lyophilized powder | Typical form supplied for research |
| Solubility | Soluble in water | Dissolves in aqueous buffers |
| Receptor target | GHRH receptor | Expressed on pituitary somatotroph cells |
Lyophilized material is generally stable for extended periods when held at minus twenty degrees Celsius or below and protected from moisture and light. In solution the peptide is more labile; bond hydrolysis, aggregation and oxidation of susceptible residues all proceed faster at ambient temperature. Repeated freeze and thaw cycles should be avoided because they promote clumping and loss of soluble material. The conjugated variant adds a further consideration, since the maleimide group can hydrolyze in aqueous buffer and lose its ability to react with albumin.
Laboratory handling centers on minimizing exposure to water, heat and oxygen before use. Working solutions are typically prepared in sterile water or a mild buffer, and any residual particulate matter is removed by filtration. When the powder dissolves slowly, a small proportion of acetonitrile or dilute acetic acid is sometimes added as a co-solvent. Containers are kept sealed and desiccated between uses. Records of lot number, reconstitution date and storage conditions support later comparison of results across experiments.
The distinguishing feature of the DAC form is a maleimide-containing group that reacts with the free thiol of cysteine-34 on human serum albumin. This reaction forms a covalent bond without enzymatic assistance, and it takes place after the peptide enters the bloodstream. Because albumin is abundant and long-lived, the attached peptide is carried through circulation far longer than an unmodified fragment would survive. The chemistry is a deliberate pharmacokinetic strategy rather than a change to receptor activity.
Enzymatic protection is a separate mechanism from plasma protein binding. The four substitutions in the backbone reduce recognition by dipeptidyl peptidase IV, which normally cleaves the natural hormone within minutes. Without the reactive group, this resistance still yields only a short window of activity, generally reported in the range of tens of minutes. With it, reported half-lives in early human work extended to several days. The size of that gap is the main practical distinction between the two materials.
Both forms act at the pituitary receptor for growth hormone-releasing hormone and increase growth hormone output, which in turn raises insulin-like growth factor 1. A long-acting analog produces sustained rather than pulsatile stimulation, and the physiological consequences of that pattern are not fully settled. Published human data on the extended form remain limited, and much of what circulates in discussion traces to early company reports rather than independent replication. How sustained exposure affects normal feedback remains an open question.
=== Metabolism === The metabolism of bicalutamide is hepatic and stereoselective. The inactive (S)-enantiomer is metabolized mainly by glucuronidation and is rapidly cleared from circulation, while the active (R)-isomer is slowly hydroxylated and then glucuronidated. In accordance, the active (R)-enantiomer has a far longer elimination half-life than the (S)-isomer, and circulating levels of (R)-bicalutamide are 10- to 20-fold and 100-fold higher than those of (S)-bicalutamide after a single dose and at steady-state, respectively. (R)-Bicalutamide is almost exclusively metabolized via hydroxylation into (R)-hydroxybicalutamide by the cytochrome P450 enzyme CYP3A4. Bicalutamide is also glucuronidated by UGT1A9, a UDP-glucuronyltransferase, into bicalutamide glucuronide, and (R)-hydroxybicalutamide glucuronide is formed from the metabolism of (R)-hydroxybicalutamide by UGT1A9. Similar to the inactive (S)-enantiomer of bicalutamide, (R)-hydroxybicalutamide is glucuronidated and rapidly cleared from circulation. None of the metabolites of bicalutamide are known to be active. Following administration of bicalutamide, only low concentrations of the metabolites are detectable in blood plasma, while unchanged bicalutamide predominates. (R)-Bicalutamide has a long elimination half-life of 5.8 days with a single dose, and an elimination half-life of 7 to 10 days with repeated administration, which allows for convenient once-daily dosing of bicalutamide.
Food noise is persistent and intrusive thoughts about food even when food security is not under threat. Although research is still in the early phase, definitions of food noise have emerged, and evidence suggests that food noise is distinct from hunger, food addiction, and food preoccupation. Instead, patients experiencing food noise report constantly ruminating about eating – when to eat, whether they are eating the right types of foods, or whether they are eating the right amount – or having self-recriminating thoughts about their relationship with food. These thoughts have a high cognitive burden and can cause distress, and it has been suggested that food noise may be a reason some people struggle to lose weight. For example, according to WW International, persistent food-related thoughts can make it difficult to adhere to a nutrition or exercise plan and make healthy food choices.
== U == Ultradian rhythm A recurrent biological cycle that occurs more than once in 24 hours, such as stages of sleep. In neuroscience, it refers to shorter rhythms regulating hormonal release, arousal, or sleep cycles. Unconditioned response In classical conditioning, an automatic, reflexive response to an unconditioned stimulus (e.g., salivation to food). Studied in behavioral neuroscience. Unconsciousness A state in which an individual is not aware of themselves or their surroundings. Can result from head injury, anesthesia, or metabolic dysfunction. Uncus A structure on the medial surface of the temporal lobe, part of the parahippocampal gyrus. It is involved in olfaction and is adjacent to the amygdala. Undershoot The hyperpolarizing phase following an action potential where membrane potential temporarily becomes more negative than resting potential. Unilateral neglect A neuropsychological condition following damage (typically to the right parietal lobe) in which patients ignore stimuli on one side of space. Unipolar depression A mood disorder characterized by persistent low mood, lack of energy, and anhedonia, without manic episodes. Associated with altered activity in the prefrontal cortex and limbic structures. Unipolar neuron A type of neuron with a single process extending from the cell body. Common in invertebrates and found in human sensory neurons. Upper motor neuron A neuron originating in the cerebral cortex or brainstem that transmits motor signals to lower motor neurons. Damage leads to spasticity, hyperreflexia, and weakness.
Sources: en.wikipedia.org
In 1899 he was appointed assistant professor at West Virginia University. He moved to the McLean Hospital Boston in 1900 as a research biochemist, eventually moving to Harvard Medical School in 1907 as an associate professor of biological chemistry, becoming the Hamilton Kuhn Professor of Biological Chemistry and Molecular Pharmacology in 1909. Together with Vintilă Ciocâlteu Otto Folin designed the Folin-Ciocalteu reagent to detect polyphenols. In 1920, he co-developed with Hsien Wu the Folin-Wu method of assaying glucose in protein-free filtrates of blood. Folin was elected the president of the American Society of Biological Chemists (now the American Society for Biochemistry and Molecular Biology) in 1909. He was a member of the editorial board of the Journal of Biological Chemistry. He was elected to the National Academy of Sciences and was awarded the Carl Wilhelm Scheele Medal of the Swedish Chemical Society in 1930.
== British and Commonwealth realms == In Commonwealth realms, including the United Kingdom, Canada, Australia and New Zealand, centenarians can receive congratulatory cards from the monarch, currently King Charles III, on their 100th birthday. In the UK, greeting cards are also sent by the monarch on every birthday beginning with the 105th. In Commonwealth realms in which the monarch does not ordinarily reside, honorees can also receive congratulations from the governor-general. In Canada, application must be made through the GGS official website. Similarly, in New Zealand, honorees must apply for greetings through the official government website.
Daniel "Dan" Conner is played by John Goodman. Dan is Roseanne's husband and father of Becky, Darlene, D.J., and Jerry. Dan is a lovable, good-natured, blue-collar family man who works as a drywall contractor. Like Roseanne, he is overweight and leads a mostly sedentary life when not working. Although Dan is a steady provider, faithful husband, and a good father, he defers most child-rearing decisions to Roseanne. While Dan is a hard-working contractor, he often shirks household duties, preferring to watch TV when at home. He often seeks refuge in the garage, tinkering on various projects to escape family stresses. In Season 1, Life and Stuff, an overworked Roseanne berates Dan for not helping enough with domestic chores. When Dan indignantly states he will cook that night's dinner, Roseanne sarcastically exclaims that he "just fixed dinner three years ago". Dan is the only child of Ed and Audrey Conner. When Dan is around forty years old, he gains a half-brother and half-sister after Ed marries Roseanne's friend, Crystal. Dan had an uneasy childhood, and his parents' divorce and his mother's mental illness has taken an emotional toll. Dan often suppresses his feelings, which can affect his reasoning. He unfairly claimed his father, Ed, caused his mother's psychiatric problems, though he gradually accepts that Ed was blameless and actually attempted to shield his son from the truth. Their relationship remains strained, however, and in The Conners, Ed and Dan no longer communicated. Dan learns of his father's death by reading about it in the obituary column.
=== Antimicrobial agents === Researchers supported by grants from the NIH and NIAID tested the efficacy of antimicrobial peptoids against antibiotic-resistant strands of Mycobacterium tuberculosis. Antimicrobial peptoids demonstrate a non-specific mechanism of action against the bacterial membrane, one that differs from small-molecule antibiotics that bind to specific receptors (and thus are susceptible to mutations or alterations in bacterial structure). Preliminary results suggested "appreciable activity" against drug-sensitive bacterial strands, leading to a call for more research into the viability of peptoids as a new class of tuberculocidal drugs. Researchers at the Barron Lab at Stanford University (supported by a NIH Pioneer Award grant) are currently studying whether upregulation of the human host defense peptide LL-37 or application of antimicrobial treatments based on LL-37 may prevent or treat sporadic Alzheimer’s dementia. Lead researcher Annelise Barron discovered that the innate human defense peptide LL-37 binds to the peptide Ab, which is associated with Alzheimer's disease. Barron's insight is that an imbalance between LL-37 and Ab may be a critical factor affecting AD-associated fibrils and plaques. The project extends focus upon the potential relationship between chronic, oral P. gingivalis and herpesvirus (HSV-1) infections to the progression of Alzheimer's dementia.
Sources: en.wikipedia.org
=== 4 April === The United States government announced a $2.6 billion (USD) aid package to Ukraine which includes ammunition for HIMARS, air defense interceptors, artillery rounds, small arms ammunition, and anti-drone systems.
==== Stem Cell-Derived Exosomes ==== Recent research suggests that stem cell-derived exosomes could become an alternative to stem cell-based therapy to minimize the limitations associated with traditional stem cell therapy such as immunogenicity and tumorigenic risk.
Russkies (1987) – A movie about a shipwrecked Soviet Navy sailor who washes ashore in Key West, Florida and is befriended by three American boys. Project X (1987) – A film starring Matthew Broderick where a US airman works with chimpanzees on Cold War-related projects. White Nights (1985) - An American (Gregory Hines), who had defected to the Soviet Union to escape racism, and a Soviet (Mikhail Baryshnikov) who had defected to the United States and is returned to the Soviet Union by accident, discover their common humanity through dance.
Sources: en.wikipedia.org
The synthetic peptide keeps the receptor-binding region of GHRH but carries substitutions that resist enzymatic cleavage. In the DAC version, an added group also anchors the molecule to albumin, extending its presence in the bloodstream.
The maleimide group forms a covalent link with albumin, an abundant blood protein. This attachment slows clearance, so a single administration persists much longer than the unmodified peptide. The feature is the main reason the two variants are handled differently in study design.
It is not an approved therapeutic product in major regulatory jurisdictions. It appears in research chemical catalogs and scientific literature rather than pharmacy shelves. Clinical development was limited and did not reach approval.
It binds the growth hormone-releasing hormone receptor on pituitary somatotroph cells. Receptor activation raises cyclic AMP and promotes release of stored growth hormone granules. Because the peptide persists longer than natural releasing hormone, stimulation is prolonged rather than brief.