Comparative study of analgesic potency of ACTH4–10 fragment and its analog semax

Clinical Outcome of Patients with Diffuse Axonal Injury Receiving Adrenocorticotropin Analogue at Dr. Soetomo Hospital

Brain traumatic injury (BTI) is one of the causes of death and disability worldwide that affects people regardless of sex, age, income and social status, race, or nationality. In patients with brain traumatic injury, one of the problems that occurs is Diffuse Axonal Injury (DAI) that can produce a direct clinical effect, leading to coma and death. Adrenocorticotropin analogues (ACTH) is one of neuroprotective therapy in brain injury. The aim of this study was to analyze the effect of ACTH analogue on the clinical output (Glasgow Outcome Score/GOS and Bartle Index) in patients with DAI at hospital discharge, 3 months and 6 months post-treatment. This study revealed that ACTH analogue administration resulted in higher GOS and Barthel Index scores than that in control. Further study will required with other variables, such as cognitive and motor examination, and some biomarkers can also be examined serially.Brain traumatic injury (BTI) is one of the causes of death and disability worldwide that affects people regardless of sex, age, income and social status, race, or nationality. In patients with brain traumatic injury, one of the problems that occurs is Diffuse Axonal Injury (DAI) that can produce a direct clinical effect, leading to coma and death. Adrenocorticotropin analogues (ACTH) is one of neuroprotective therapy in brain injury. The aim of this study was to analyze the effect of ACTH analogue on the clinical output (Glasgow Outcome Score/GOS and Bartle Index) in patients with DAI at hospital discharge, 3 months and 6 months post-treatment. This study revealed that ACTH analogue administration resulted in higher GOS and Barthel Index scores than that in control. Further study will required with other variables, such as cognitive and motor examination, and some biomarkers can also be examined serially.

Influence of ACTG4-7-PGP (Semax) on Morphofunctional State of Hepatocytes in Chronic Emotional and Painful Stress

We studied the effect of intraperitoneal administration of peptide ACTG_4-7-PGP to male Wistar rats in doses of 5, 50, 150, and 450 μg/kg on the morphofunctional state of hepatocytes in chronic emotional and painful stress. A dose-dependent stress-limiting effect of the peptide was observed: it normalized the protein synthesis function of the liver and serum activity of ALT. The anticytolytic effect of the peptide increased with increasing its dose against the background of the increase in the relative number of multinucleated and multinucleolated cells and deceleration of the recovery of serum protein concentration. The decrease of hepatocyte cytolysis against the background of more intense morphological signs of protein synthesis processes attests to activation of reparative processes in the liver parenchyma via enhanced constitutional synthesis of protein.

[EFFECT OF PEPTIDE SEMAX ON SYNAPTIC ACTIVITY AND SHORT-TERM PLASTICITY OF GLUTAMATERGIC SYNAPSES OF CO-CULTURED DORSAL ROOT GANGLION AND DORSAL HORN NEURONS]

The influence of long-term culturing (12 days in vitro) of dorsal root ganglion (DRG) and dorsal horn (DH) neurons with peptide Semax on the level of synaptic activity at co-cultures, as well as short-term plasticity in sensory synapses were studied. It has been shown that neuronal culturing with peptide at concentrations of 10 and 100 µM led to increasing the frequency of spontaneous glutamatergic postsynaptic currents in DH neurons to 71.7 ± 1.8% and 93.9 ± 3.1% (n = 6; P < 0.001); Semax has a not significant effect on the amplitude and frequency of miniature glutamatergic currents, but causes an increase of the amplitudes of spontaneous postsynaptic currents, as well as elevates the quantum content. The data show the increase of multivesicular glutamate release efficiency in neural networks of co-cultures following incubation with the peptide. Also Semax (10 and 100 µM) induces changes of the basic parameters of short-term plasticity in sensory synapses: (1) increasing the paired-pulse ratio from 0.53 ± 0.028 (n = 8) to 0.91 ± 0.072 (n = 6, P < 0.01) and 0.95 ± 0.026 (n = 7; P < 0.001); (2) reducing the ratio of the coefficients of variation (CV2/ CV1) from 1.49 ± 0.11 (n = 8) to 1.02 ± 0.09 (n = 6; P < 0.05) and 1.11 ± 0.13 (n = 7; P < 0.0) respectively. The results indicate a stimulating effect of Semax on the activity of glutamatergic synapses in neural networks of co-cultures, as well as the ability of the peptide to effectively modulate the short-term plasticity in sensory synapses.