Thymogen

Key findings (each cites a source)

• A review reported chirality as a factor in peptide/protein interactions and discussed Thymogen as an immunostimulant (L-Glu-L-Trp) in comparison with the enantiomeric immunosuppressor Thymodepressin (D-Glu(D-Trp)). [PMID 38732260]
• Research in an acute toxic hepatopathy model reported that Thymogen and D-Ala–modified analogues suppressed oxidative peroxidation and stimulated reparative regeneration of hepatocytes. [PMID 37861903]
• In the liver damage model, the reported effects of Thymogen analogues were more pronounced than Thymogen, and D-Ala inclusion was reported to enhance regeneration and antioxidant effects, with highest efficiency reported when D-Ala was added to the C-end. [PMID 37861903]
• A rat hepatopathy study reported that thymogen and thymogen analogues with D-alanine attached to the N- or C-terminus inhibited lipid peroxidation and stimulated reparative regeneration of hepatocytes. [PMID 40442470]
• In that hydrazine hepatopathy study, the thymogen analogue reported as most effective was the version with D-Ala at the C-terminus, and increasing the doses beyond stated levels was reported not to further increase hepatoprotective activity. [PMID 40442470]
• In female rat experiments investigating radiation-induced carcinogenesis, a study reported that thymogen inhibited Sr-90/Cs-137-induced radiation carcinogenesis, with decreased total tumor and cancer occurrence, and that thymogen alone was associated with longer life span and lower overall tumor/cancer occurrence in the study design. [PMID 1300740]
• In experimental studies of acute abdominal disorders in rats, research reported thymogen-associated reductions in indicators such as autoenzyme aggression (serum alpha-amylolytic activity) and lipid peroxidation products (malonic dialdehyde), alongside reported attenuation of depression of antiradical activity (superoxide dismutase and catalase) and reduced leukocytosis/leukocyte intoxication index compared with untreated animals. [PMID 9542399]
• In candidiasis under immunodepression, experimental work reported that after thymogen injections the course of candidiasis proceeded less severely, suggesting activation of an immunocompetent system including thymus in that model. [PMID 2337388]
• In a study of esophageal and forestomach tumor development induced by N-nitrososarcosine ethyl ester in rats, thymogen was reported to decrease tumor incidence and reduce tumor multiplicity, while a comparator polypeptide drug was reported not to influence tumor development. [PMID 2759010]
• A review summarized authors’ long-term “clinical study results” regarding peptide bioregulators (including Thymogen) for prevention of diseases and treatment of people of different ages, with emphasis on use as “geroprotectors.” [PMID 24003726]