Previous studies suggested that mastication activity can affect learning and memory function. However, most were focused on mastication impaired models by providing long-term soft diet. The effects of chewing food with various hardness, especially during the growth period, remain unknown. Objective: To analyze the difference of hippocampus function and morphology, as characterized by pyramidal cell count and BDNF expression in different mastication activities. Materials and Methods: 28-day old, post-weaned, male-Wistar rats were randomly divided into three groups (n=7); the first (K0) was fed a standard diet using pellets as the control, the second (K1) was fed soft food and the third (K2) was fed hard food. After eight weeks, the rats were decapitated, their brains were removed and placed on histological plates made to count the pyramid cells and quantify BDNF expression in the hippocampus. Data collected were compared using one-way ANOVA. Results: Results confirmed the pyramid cell count (K0=169.14±27.25; K1=130.14±29.32; K2=128.14±39.02) and BDNF expression (K0=85.27±19.78; K1=49.57±20.90; K2=36.86±28.97) of the K0 group to be significantly higher than that of K1 and K2 groups (p<0.05); no significant difference in the pyramidal cell count and BNDF expression was found between K1 and K2 groups (p>0.05). Conclusion: A standard diet leads to the optimum effect on hippocampus morphology. Food consistency must be appropriately suited to each development stage, in this case, hippocampus development in post-weaned period.

Introduction: Corona disease-19 virus (COVID-19) spread and caused a pandemic that affected people all over the world. COVID-19 is also called Severe Acute Respiratory Syndrome-Coronavirus Disease (SARS-CoV). Discussion: COVID-19 is a β-coronavirus serotype which is a single strain of RNA virus and was an outbreak in 2002 (SARS-CoV) and 2012 (MERS-CoV). COVID-19 has Open Reading Frames (ORFs) consisting of Spikes (S), Envelopes (E), Membranes (M), and Nucleocapsids (N) with S parts being a glycoprotein that can attach to receptors owned by host cells, the receptors are CD 26, ACE-2, Ezrin, and Cyclophilins with the main receptor being ACE-2 in the lung organs. Process would evoke a host body's immune response consisting of natural and adaptive immune systems, involving the Antigen Presenting Cell (APC) system which consists of two, namely: Major Histocompatibility Complex (MHC) class I and II. APC could also generate adaptive immune system, consists of B and T cells. COVID-19 had the ability to survive in B and T cells, so that cytokine-chemokine secretion continues to be known as cytokine storm that trigger Acute Respiratory Distress Syndrome (ARDS) and death. Conclusion: The recovery prognosis of COVID-19 depended on the detection of COVID-19 patients because it was related to the severity of ARDS, so the earlier it was detected, the greater the chance of recovery.

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Objective: Indonesia has many kinds of useful herbs, which are often used as species such as chili, pepper or cayenne pepper (capsicum frutescens L). Previous study showed topical capsaicin can be used as a therapy to cure pain due to inflammation. Small concentrations of capsaicin can attenuate cytokines in the inflammatory process. Capsaicin studies in animal model showed activation of the transient receptor potential vanilloid-1. Capsaicin can decrease various cytokines such as IL-6, IL-12, IL-1β and increase IL-10. Capsaicin is a natural agonist for transient receptor potential vanilloid-1. The aim of this study is to prove the effect of capsaicin on transient receptor potential vanilloid-1 expression and TNF-α and TLR-4 toward pain. Material and Methods: An experimental laboratory research used animal model Wistar male rats (rattus novegicus) induced with Aggregatibacter actinomycetemcomitans serotype b and green chili extract (capsicum frutescens L.) with a dose of 0.0912 mg/kg/day was applied to surface of the gingiva on maxillary first molar for 7 days. An immunohistochemical examination was conducted to see the density of transient receptor potential vanilloid-1 and the expression of TLR-4 and IL-1β in the mucosal tissues of the oral cavity. Results: There were significant differences in the applications of Capsicum frutescens L. with increasing of TRPV ligand-1 and IL-1β (p<0.05), while the TLR-4 (p>0.05) showed a significant difference to TRPV-1 and IL-1β. There is no significant difference to TLR-4. Conclusion: Capsaicin can increase TRPV-1 and decrease IL-1β but did not affect the TLR-4. Capsaicin can be used to decrease pain and accelerate healing process in periodontitis.

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Background: Dental X-ray has an important role in dentistry. Complication case such as tooth fracture extraction requires this examination to determine the appropriate treatment measures. Dental X-ray can also cause a negative impact to the body at cellular and even molecular level. Purpose: The aim of this study was to evaluate the decrease of vascular endothelial growth factor (VEGF) expression and new blood vessels number caused by dental X-ray irradiation on fractured tooth extraction wound on day 3 and 7 after extraction. Method: We used 30 wistar rats which was randomly divided into 6 groups. Each rat's central insisive of left mandible was fractured and then extracted after or without X-ray irradiation. Group KA and KB were control groups without irradiation. Group P1 A and P1 B were treatment groups with 0.08 mSv irradiation dose. Group P2 A and P2 B were treatment groups with 0.16 mSv irradiation dose. The subject from group KA, P1 A, and P2 A were sacrficed and sockets were collected at day 3. The subject from group KB, P1 B, and P2 B were sacrficed and sockets were collected at day 7. Socket were processed and painted with hematoxylin eosin and immunohistochemistry, then observed with a microscope. Data processing was performed with SPSS 16 through one way anova test and post hoc Tukey test HS. Result: The lowest means expression of VEGF and the number of new blood vessels on the day 3 was found in P2 A group, and the highest found in the KA group. The lowest means expression of VEGF and the number of new blood vessels on the day 7 was found in P2 B group, and the highest found in the KB group. Conclusion: Dental X-ray irradiation dose of 0.08 mSv and 0.16 mSv causes decrease of VEGF expression and new blood vessels in the wound fractured tooth extraction in day 3 and day 7 post-extraction.

The use of organophosphates (pesticides and other compounds to eradicate pests), currently, to increase the fulfillment of the population's consumption needs has a double-edged sword effect, on the one hand it can increase the need for food to be consumed by the population. The negative effect that can arise is the safety of organophosphate drugs which can contaminate the soil and water sources around the place where organophosphate drugs are used. The negative effects of organophosphates are associated with the effects of xenobiotics on humans who consume them. Xenobiotics are associated with toxicdynamic effects where organophosphates cause irreversible inhibition of the enzyme acetylcholinesterase (ACh). ACh is one of the main enzymes in the nervous system that terminates impulse conduction through the hydrolysis process of acetylcholine enzymes. Acetylcholinesterase is a specific molecular target of organophosphate pesticides. The inhibition of the Ach enzyme causes the inhibition of the acetylcholine enzyme which is normally always hydrolyzed by the Ach enzyme and is a specific biological marker of pesticide poisoning. Inhibition of ACh will cause the accumulation of the enzyme acetylcholine, resulting in negative effects of organophosphate poisoning which can lead to death. In this paper, the authors collect from various sources related to the study of molecular toxicology toxidynamic effects of drug safety and organophosphate poisoning. The results of this review article show that organophosphate poisoning is associated with irreversible inhibition of the acetylcholinesterase enzyme which results in death in the individual concerned.