Khavinson is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2026-01-20. Numbers and descriptions here follow the published literature rather than marketing material.
Published evidence comes mainly from Russian-language journals and from a single research group, with small sample sizes and limited independent replication. A few laboratories outside that group have examined related peptides and reported weaker or absent telomerase effects, so the central claim is best described as contested rather than settled. Rodent studies report modest changes in some ageing markers and in survival, but designs vary and control conditions are often sparse. No large randomised trial in humans has been published, and long-term safety data in healthy populations are correspondingly thin.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. It was designed at the St. Petersburg Institute of Bioregulation and Gerontology as a short, chemically defined analogue of epithalamin, a fraction obtained from bovine pineal tissue. Small peptide bioregulators of this type formed a long-running line of work there from the 1980s onward. Because the molecule is produced by solid-phase synthesis rather than extraction, its composition is exact and its purity can be measured directly.
Proposed mechanisms centre on cell-culture observations rather than a defined receptor interaction. Several reports describe increased expression of the telomerase catalytic subunit after exposure of cultured human cells, and the authors attributed the effect to short peptide fragments entering the nucleus and influencing gene transcription. No receptor for the tetrapeptide has been identified, and the free peptide is expected to be degraded rapidly by plasma peptidases. Whether any measurable fraction reaches intact tissues after administration remains an unresolved question rather than an established finding.
The published literature is dominated by a small number of research groups, much of it in Russian-language journals, and independent replication outside those groups is limited. Studies are typically small, use cultured cells or rodent models, and report endpoints that differ between papers, which makes comparison difficult. Large randomised human trials have not appeared in the indexed literature. Questions about absorption, distribution and clearance are therefore still treated as open in reviews that mention the compound.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Calculated from the four residues with three water losses |
| Molecular mass | About 390.35 g/mol | Monoisotopic mass near 390.14, used for mass-spectrometric identification |
| Peptide sequence | Ala-Glu-Asp-Gly | Single-letter form AEDG; no disulfide bonds or modified residues |
| Appearance | White to off-white solid | Supplied as a dried powder |
| Isoelectric point | Around 4 | Estimated from aspartate and glutamate side-chain pKa values |
Laboratory work has examined effects on telomerase activity in cultured cells, on melatonin rhythms in animals, and on markers of oxidative stress. Some experiments report measurable changes while others show none, and the reported findings rest largely on small studies. The absence of large independent trials means the generality of these results is unresolved rather than settled. Review articles occasionally apply the label geroprotector, a term that reflects a research hypothesis about ageing rather than an established clinical finding.
Epitalon is the common name for a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, usually abbreviated AEDG. All four residues are proteinogenic amino acids, and the free peptide has a calculated mass near 390 grams per mole. Because the chain is short and carries no modifications, it is assembled readily by solid-phase synthesis and is distributed mainly as a freeze-dried solid for laboratory work. Catalogue listings use the spellings epitalon, epithalone, and simply AEDG, and the three refer to the same sequence.
Reported biological findings come mainly from cell culture and rodent experiments. Those studies describe changes in telomerase catalytic subunit expression, melatonin rhythm amplitude, and antioxidant enzyme activity after peptide exposure. Human data are sparse and consist of small trials with limited blinding and inconsistent endpoints. The proposed mechanisms remain hypotheses rather than established facts, and there is no consensus on whether effects observed in animals carry over to people. Independent replication outside the original research groups is limited, which is a recognised gap in the published literature.
The parent extract epithalamin was characterised as a low-molecular-weight fraction of pineal tissue rather than a single defined chemical entity. Researchers fractionated it and tested successive fragments for activity, a screening approach typical of peptide discovery work in that era. Epitalon emerged from that process as one of the shorter sequences of interest. Because the original extract was never fully resolved into individual components, claims about which constituent drives a given effect rest on inference. This distinction matters when reading older reports that attribute extract observations to the tetrapeptide itself.
== Treatments == Treatments differ according to the type of amyloidosis present. The majority of treatment is aimed at preserving heart function and treating heart failure symptoms. Loop diuretics are often used for fluid overload symptoms due to heart failure. Light chain (AL-CM) Treatment: Since the cause of this subtype of cardiac amyloidosis is the excessive production of free light chains, the major goal of treatment is the reduction in concentration of light chains. For light-chain amyloidosis, the use of FLC assays and NT-proBNP levels can be used to monitor the progression of amyloidosis and any response to treatments. One of the major routes to decrease the production of these excess light chains is to kill the abnormal cells that are producing them. Chemotherapeutic agents such as melphalan or bortezomib can be used to kill off the abnormal cell line that is producing the free light chains. Following chemotherapy, a bone marrow transplant can be utilized to restore the normal cell lines. There are newer medications (ixazomib, carfilzomib, daratumumab, elotuzumab) under research for the treatment of multiple myeloma that can help to decrease the production of free light chains. New data suggests that orthotopic heart transplant followed by melphalan and stem cell transplant produces results similar to non cardiac amyloidosis indicated heart transplant.
==== United States ==== 2003: Meloxicam was approved in the US for use in dogs for the management of pain and inflammation associated with osteoarthritis, as an oral (liquid) formulation of meloxicam. 2003 (November): An injectable formulation for use in dogs was approved by the US Food and Drug Administration (FDA). 2004 (October): A formulation for use in cats was approved for use before surgery only. This is an injectable meloxicam, indicated for as a single, one-time dose only, with specific and repeated warnings not to administer a second dose. 2005 (January): The product insert added a warning in bold-face type: "Do not use in cats." 2005: The FDA sent a Notice of Violation to the manufacturer for its promotional materials which included promotion of the drug for off-label use. 2020 (February): A meloxicam injection was approved for use in the United States. Specifically, the FDA granted the approval of Anjeso to Baudax Bio.
VOCs can also be introduced from the bodies of the bees, be produced by the enzymatic actions of digestion, or from chemical reactions that occur between different substances within the honey during storage, and therefore may change, increase, or decrease over long periods of time. VOCs may be produced, altered, or greatly affected by temperature and processing. Some VOCs are heat labile, and are destroyed at elevated temperatures, while others can be created during non-enzymatic reactions, such as the Maillard reaction. VOCs are responsible for nearly all of the aroma produced by a honey, which may be described as "sweet", "flowery", "citrus", "almond" or "rancid", among other terms. In addition, VOCs play a large role in determining the specific flavor of the honey, both through the aromas and flavor. VOCs from honeys in different geographic regions can be used as floral markers of those regions, and as markers of the bees that foraged the nectars.
Acheta domesticus, commonly called the house cricket, is a species of cricket most likely native to Southwestern Asia, but between 1950 and 2000 it became the standard feeder insect for the pet and research industries and spread worldwide. They can be kept as pets themselves, as this has been the case in China and Japan.
Sources: en.wikipedia.org
Microstructure is defined as the structure of a prepared surface or thin foil of material as revealed by a microscope above 25× magnification. It deals with objects from 100 nm to a few cm. The microstructure of a material (which can be broadly classified into metallic, polymeric, ceramic and composite) can strongly influence physical properties such as strength, toughness, ductility, hardness, corrosion resistance, high/low temperature behavior, wear resistance, and so on. Most of the traditional materials (such as metals and ceramics) are microstructured. The manufacture of a perfect crystal of a material is physically impossible. For example, any crystalline material will contain defects such as precipitates, grain boundaries (Hall–Petch relationship), vacancies, interstitial atoms or substitutional atoms. The microstructure of materials reveals these larger defects and advances in simulation have allowed an increased understanding of how defects can be used to enhance material properties.
Brachyury, Axl, MEK, and Aurora kinase A are molecular drivers of these programs, and inhibitors are currently in clinical trials to determine therapeutic applications. Oncogenic PKC-iota can promote melanoma cell invasion by activating Vimentin during EMT. PKC-iota inhibition or knockdown resulted an increase E-cadherin and RhoA levels while decreasing total Vimentin, phosphorylated Vimentin (S39) and Par6 in metastatic melanoma cells. These results suggested that PKC-ι is involved in signaling pathways which upregulate EMT in melanoma. EMT has been indicated to be involved in acquiring drug resistance. Gain of EMT markers was found to be associated with the resistance of ovarian carcinoma epithelial cell lines to paclitaxel. Similarly, SNAIL also confers resistance to paclitaxel, adriamycin and radiotherapy by inhibiting p53-mediated apoptosis. Furthermore, inflammation, that has been associated with the progression of cancer and fibrosis, was recently shown to be related to cancer through inflammation-induced EMT. Consequently, EMT enables cells to gain a migratory phenotype, as well as induce multiple immunosuppression, drug resistance, evasion of apoptosis mechanisms. Some evidence suggests that cells that undergo EMT gain stem cell-like properties, thus giving rise to Cancer Stem Cells (CSCs). Upon transfection by activated Ras, a subpopulation of cells exhibiting the putative stem cell markers CD44high/CD24low increases with the concomitant induction of EMT.
=== Creative food design === Food presentation and food appearance customization for individuals is a big trend in the food industry. So far food customization and creative designs have required hand-made skills, which results in low production rate and high cost. 3D food printing can overcome this problem by providing the necessary tools for creative food design even for home users. 3D food printing has enabled some intricate designs which cannot be accomplished with traditional food manufacturing. Brand logos, text, signatures, pictures can now be printed on some food products like pastries and coffee. Complex geometric shapes have also been printed, mainly using sugar. With 3D printing, chefs can now turn their visual inspirations into signature culinary creations. Another benefit is being able to print nutritious meals in shapes that appeal to children.
=== Epidemiology === Kalra has been the lead or senior author of several epidemiological studies in the field of obesity. In addition to using national datasets, he has served as a regional lead investigator for Haryana in the ICMR-funded INDIAB Study. Multiple papers from this cohort have been published, including national obesity prevalence data in The Lancet and several other studies. He has also contributed to studies assessing the prevalence of obesity-related comorbidities, including steatotic liver disease. Kalra is the senior author of a major analysis from the Comprehensive National Nutrition Survey, reporting the prevalence of childhood obesity in India. From the Longitudinal Ageing Study in India, he has also led work reporting the first national estimates of sarcopenia and sarcopenic obesity in older adults.
Risks arising from their use should not exceed the threshold of 'maximum acceptable risks'. The new implementing regulations seek to specify this threshold." While devices for neurostimulation with an intended medical purpose require a pre-market approval, their direct-to-consumer products are only subjected to the CE marking of conformity. The EU lacks specific regulations and directives dedicated to neurotechnologies. Therefore, any physician, nurse, psychologist, occupational therapist, or specialist in neurotechnology and bioengineering may conduct neurotherapy. In the United States, the Food and Drug Administration (FDA) does not regulate neurotherapy (since it is the practice of medicine). "Licenses—such as those for physicians, registered nurses, and dentists—are typically obtained after providing evidence of education and training; some require proof of passing written and/or clinical exams. Licenses allow individuals to provide a specific set of services that are considered to be within the limits of one's field, or "scope of practice". That is, licenses, for example, for physicians and registered nurses, allow them to practice neurotherapy that is considered within their area of specialty or scope of practice.
Sources: en.wikipedia.org
Participation in rehabilitation programs during the early to middle stage of the disease may be beneficial as it translates into long-term maintenance of motor and functional performance. Rehabilitation during the late stage aims to compensate for motor and functional losses. For long-term independent management, the therapist may develop home exercise programs for appropriate people. Palliative care may also improve quality of life for people with HD by treating the symptoms and psychological stress of having a progressive degenerative disease.
Cancer begins as cells that grow uncontrollably, usually as a result of an internal change or oncogenic mutations within the cell. Cancer develops and progresses as the microenvironment undergoes dynamic changes. The stromal reaction in cancer is similar to the stromal reaction induced by injury or wound repair: increased extracellular matrix (ECM) and growth factor production and secretion, which consequently cause growth of the tissue. In other words, the body reacts similarly to a cancer as it does to a wound, causing scar-like tissue to be built around the cancer. As such, the surrounding stroma plays a very important role in the progression of cancer. The interaction between cancer cells and surrounding tumor stroma is thus bidirectional, and the mutual cellular support allows for the progression of the malignancy.
== External links == Media related to Zearalenone at Wikimedia Commons Eriksen GS, Pennington J, Schlatter J (2000). "Zearalenone". WHO International Programme on Chemical Safety - Safety Evaluation of Certain Food Additives and Contaminants. Inchem. WHO Food Additives Series.
10 April National Security Study Memorandum 36 required an interagency plan with specific timetables for turning over the war to the South Vietnamese on the basis of four alternative timetables (18, 24, 30 and 42 months), with a starting date of 1 July 1969.
Sources: en.wikipedia.org
No. Epithalamin is a peptide-containing extract of bovine pineal glands, while epitalon is a single synthetic tetrapeptide. The extract contains many peptides and other tissue components, so its composition varies between batches in ways that a synthesised sequence does not.
It is not recognised as an endogenous peptide hormone. The four-residue sequence can appear inside larger proteins and in digestive fragments of dietary protein, but no dedicated pathway producing it as a signalling molecule has been identified.
Several cell-culture reports describe increased telomerase activity after treatment, measured by enzyme assays or by transcript levels. Results differ between cell types and laboratories, and measured telomere lengthening has been reported in some studies but not in others, which leaves the physiological relevance open.
No. Epithalamin is a heterogeneous peptide fraction obtained from pineal gland extract and contains many components. Epitalon is a single synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly. Researchers synthesised the shorter peptide while attempting to identify active sequences within the extract.