Сравнение
Octreotide vs. Semax
Два пептида рядом — идентичность, доказательная база, правовой статус и известные нежелательные явления.
Идентичность
Категория
Исследования (прочее)
Исследования (прочее)
Номер CAS
83150-76-9
80714-61-0
Молекулярная масса
1019.24 g/mol
813.92 g/mol
Период полувыведения
1.7 h
0.3 h
Последовательность
D-Phe-Cys-Phe-D-Trp-Lys-Thr-Cys-Thr(ol)Met-Glu-His-Phe-Pro-Gly-ProМеханизм действия
Octreotide
Octreotide is a cyclic octapeptide that selectively binds somatostatin-receptor subtypes SSTR2 and SSTR5. Via G-protein-coupled signalling, adenylyl cyclase is inhibited, reducing the secretion of multiple hormones (growth hormone, IGF-1, glucagon, insulin, VIP, serotonin). Structural stabilisation via a disulfide bridge and D-amino acids extends the half-life relative to natural somatostatin (minutes to several hours).
Semax
Semax is a tetracosactide fragment analog without hormonal activity at MC2R. Proposed mechanisms include elevation of BDNF and NGF in hippocampus and striatum (in animal models), modulation of dopamine metabolism, and neuroprotective effects via anti-apoptotic pathways. A clear primary receptor is not established.
Доказательная база
Наивысшая доказательность
РКИ на людях
Исследование на людях
Исследования
5
4
из них на людях
4
2
Зафиксированные эффекты
3
3
Открытые противоречия
1
1
Задокументированные нежелательные явления
2
1
Правовой статус
Полные записи
Frequently asked questions
- What is the difference between Octreotide and Semax?
- Octreotide is classified as "Исследования (прочее)", while Semax is classified as "Исследования (прочее)". Octreotide: Synthetic octapeptide somatostatin analog with a longer half-life than endogenous somatostatin. FDA- and EMA-approved since the 1980s for acromegaly and neuroendocrine tumours. Semax: Synthetic heptapeptide derived from the N-terminal fragment of adrenocorticotropic hormone (ACTH 4-10). Approved in Russia for ischaemic stroke, cognitive function and ADHD in children. Western phase-3 trials absent. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Octreotide or Semax?
- The highest available evidence level is "РКИ на людях" for Octreotide and "Исследование на людях" for Semax. A higher evidence level means more robust data, but says nothing about suitability for an individual. The full body of evidence is on each peptide's own page.
- What is the legal status of Octreotide and Semax in Germany and the United States?
- Германия: Octreotide — Рецептурный, Semax — Не одобрено. США: Octreotide — Рецептурный, Semax — Не одобрено. These are factual summaries with source and review date on the individual pages.