Kisspeptin-10 and Puberty Timing Research: HPG Axis Development, GnRH Pulse Onset and Precocious Puberty BiologyKisspeptin's discovery as the gatekeeping signal for hypothalamo-pituitary-gonadal (HPG) axis activation at puberty onset represented a paradigm shift in reproductive neuroendocrinology. The KISS1 gene product — processed into kisspeptin-54, -14, -13, and -10 depending on proteolytic cleavage context — acts…
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Epitalon and Pineal Gland Research: Melatonin Restoration, Circadian Rhythm and Ageing BiologyEpitalon (Epithalon, Epitalamin synthetic tetrapeptide Ala-Glu-Asp-Gly) was developed by Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology, originally derived from the natural polypeptide extract epithalamin produced from bovine pineal tissue. The pineal gland's central role in circadian biology,…
PT-141 and Female Sexual Dysfunction Research: Melanocortin Pathways, Desire and Central Arousal MechanismsPT-141 (Bremelanotide), the melanocortin receptor agonist derived from Melanotan II, has a well-characterised research profile in male sexual dysfunction — particularly its role in erectogenic mechanisms through central MC4R-mediated dopaminergic activation. The parallel research programme in female sexual dysfunction (FSD) is substantial,…
BPC-157 and Bone Healing Research: Fracture Repair, Osteoblast Biology and Connective Tissue MechanismsBPC-157 (Body Protection Compound 157) has an established preclinical profile in soft tissue repair — gastrointestinal mucosal healing, tendon and ligament repair, and muscle regeneration are among its most extensively studied biological activities. A less prominently discussed but mechanistically important research area…
Follistatin and Muscle Wasting Disease Research: Cachexia, Sarcopenia and Myostatin Inhibition BiologyFollistatin's role as an endogenous antagonist of myostatin — and of the broader TGF-β/activin signalling axis — positions it at the centre of research into muscle wasting conditions. Cachexia, the severe muscle and fat wasting syndrome associated with cancer, chronic heart failure, COPD,…
TB-500 and Cardiac Repair Research: Thymosin Beta-4, Cardiomyocyte Regeneration and Heart Failure BiologyAmong the many tissue repair functions attributed to Thymosin Beta-4 (TB-500), cardiac regeneration stands out as a particularly compelling research area — not merely because of the magnitude of unmet clinical need in heart failure, but because TB-500's cardiac biology challenges fundamental…
LL-37 and Cancer Immunology: Antimicrobial Peptide Research, Tumour Biology and Immune ModulationLL-37 is the sole member of the cathelicidin family expressed in humans, and among the most thoroughly studied host defence peptides in biomedical science. While its antimicrobial properties — direct membrane disruption of bacteria, fungi, and enveloped viruses — have been known for…
Peptide Cycling and Research Protocol Design: How Scientists Structure Peptide StudiesStructuring a peptide research protocol is not simply a matter of choosing a compound and a dose. Rigorous preclinical and translational research requires decisions about administration timing, cyclical exposure, washout periods, outcome measurement, and the biological rationale underpinning each design choice. This guide examines…
Selank and Anxiety Neuroscience: GABA Modulation, Stress Biology and Anxiolytic Mechanisms (UK 2026)
Selank and Anxiety Neuroscience: GABA Modulation, Stress Biology and Anxiolytic Mechanisms (UK 2026)Selank is a synthetic heptapeptide — Thr-Lys-Pro-Arg-Pro-Gly-Pro — derived from the endogenous immunomodulatory peptide Tuftsin, with an added Pro-Gly-Pro sequence for enhanced stability. Developed at the Institute of Molecular Genetics of the Russian Academy of Sciences, it has been registered as an…
Oxytocin and Social Bonding Research: Trust, Attachment and Prosocial Neuroscience (UK 2026)Oxytocin is a nine-amino-acid neuropeptide produced in the hypothalamus and released both centrally (from hypothalamic projections to limbic regions) and peripherally (from the posterior pituitary into the bloodstream). It has been studied for decades as the hormone of birth and breastfeeding, but its…
Snap-8 and Expression Line Research: Neuropeptide Inhibition and Cosmetic Peptide Biology (UK 2026)Snap-8 (Acetyl Octapeptide-3) is a synthetic octapeptide — Acetyl-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NH₂ — developed as a longer-chain analogue of Argireline (Acetyl Hexapeptide-3), with extended SNAP-25 protein mimicry for enhanced efficacy in reducing expression-driven facial lines. Its mechanism targets the SNARE (Soluble NSF Attachment Protein Receptor)…
Tesamorelin and Visceral Fat Research: HIV Lipodystrophy, MASH and GH Axis Biology (UK 2026)Tesamorelin is a synthetic GHRH analogue — the 44-amino-acid GHRH sequence with a trans-3-hexenoic acid modification that stabilises the molecule against DPP-IV degradation and extends its effective half-life. It is the only GHRH analogue with FDA approval — specifically for HIV-associated…
