Optimasi dan uji efektivitas ekstrak Ganoderma lucidum sebagai anti-Helicobacter pylori

Helicobacter pylori diketahui sebagai penyebab utama tukak lambung dengan melemahkan lapisan pelindung pada lambung dan duodenum. Sejumlah obat anti tukak lambung yang sering digunakan dapat menyebabkan resistensi pada H. pylori. Ganoderma lucidum diketahui dapat menghambat dan mendukung penyembuhan tukak lambung yang disebabkan oleh asam asetat. Akan tetapi, kemampuan G. lucidum dalam menghambat tukak lambung yang disebabkan H. pylori belum banyak diungkap. Penelitian ini bertujuan untuk mengetahui efektivitas ekstrak G. lucidum dalam menghambat pertumbuhan H. pylori penyebab tukak lambung. Penelitian merupakan ekperimental dua faktorial yaitu jenis pelarut fraksinasi dan konsentrasi ektrak G. lucidum. Ekstrak G. lucidum difraksinasi menggunakan dua jenis pelarut yaitu etanol 60% dan akuades. Konsentrasi ekstrak G. lucidum yang digunakan adalah 1, 5, 10, 20, 30 mg/mL. Efektivitas ekstrak G. lucidum diuji dengan metode difusi cakram. Berdasarkan analisis statistik didapat bahwa jenis pelarut berpengaruh terhadap aktivitas daya hambat H. pylori dengan nilai pada pelarut etanol 60% signifikan lebih tinggi dibandingkan akuades. Konsentrasi ekstrak G. lucidum baik etanol maupun akuades berpengaruh signifikan terhadap aktivitas daya hambat. Aktivitas daya hambat tertinggi adalah pada perlakuan ekstrak etanol G. lucidum konsentrasi 20 mg/ml. Kata kunci: akuades; difusi cakram; etanol; Helicobacter pylori; Ganoderma lucidum ABSTRACTOptimization and effectiveness assay of Ganoderma lucidum extract as Anti-Helicobactor pylori. Helicobacter pylori is known to be the main cause of gastric ulcers by weakening the protective lining of the stomach and duodenal. A number of gastric anti-ulcer drugs can cause resistance to H. pylori. Ganoderma lucidum is known to inhibit and support the healing of gastric ulcers caused by acetic acid. G. lucidum's ability to inhibit H. pylori growth has not been revealed much. This research aims to find out the effectiveness of G. lucidum extract in inhibiting the growth of H. pylori which causes gastric ulcers. This study is an experimental two factorial namely the type of fractionation solvent and the concentration of G. lucidum extract. Ganoderma lucidum extract is diffractionated using two types of solvents namely 60% ethanol and akuades. The concentration of G. lucidum extract used is 1, 5, 10, 20, 30 mg/mL. The effectiveness of G. lucidum is tested using the disc diffusion method. Based on statistical analysis found that the type of solvent affects the activity of H. pylori's resistance with a value in ethanol solvents 60% significantly higher than akuades On the other hand the concentration of G. lucidum extract in both ethanol and aquades has a significant effect on the activity of the slave. The highest inhibitory activity is in the treatment of ethanol extract G. lucidum concentration 20 mg / ml. Keywords: aquades; diffusion disc; ethanol; Helicobacter pylori; Ganoderma lucidum

Inverse heavy enzyme isotope effects in methylthioadenosine nucleosidases

Heavy enzyme isotope effects occur in proteins substituted with 2H-, 13C-, and 15N-enriched amino acids. Mass alterations perturb femtosecond protein motions and have been used to study the linkage between fast motions and transition-state barrier crossing. Heavy enzymes typically show slower rates for their chemical steps. Heavy bacterial methylthioadenosine nucleosidases (MTANs from Helicobactor pylori and Escherichia coli) gave normal isotope effects in steady-state kinetics, with slower rates for the heavy enzymes. However, both enzymes revealed rare inverse isotope effects on their chemical steps, with faster chemical steps in the heavy enzymes. Computational transition-path sampling studies of H. pylori and E. coli MTANs indicated closer enzyme–reactant interactions in the heavy MTANs at times near the transition state, resulting in an improved reaction coordinate geometry. Specific catalytic interactions more favorable for heavy MTANs include improved contacts to the catalytic water nucleophile and to the adenine leaving group. Heavy bacterial MTANs depart from other heavy enzymes as slowed vibrational modes from the heavy isotope substitution caused improved barrier-crossing efficiency. Improved sampling frequency and reactant coordinate distances are highlighted as key factors in MTAN transition-state stabilization.

Comparison of Proton Pump Inhibitor and Triple Therapy Regimen for Laryngospharyngeal Reflux Disease

Background: Laryngopharyngeal reflux is retrograde flow of contents of the stomach to the larynx and the pharynx. The study aims to compare two regimens (proton pump inhibitor monotherapy versus triple therapy) on the outcome of Helicobactor pylori positive laryngopharyngeal reflux disease. Methods: The presence of laryngopharyngeal reflux was determined by reflux symptom index and reflux finding score. The presence of Helicobactor pylori in the tissue was confirmed by rapid urease test. All urease test negative laryngopharyngeal reflux patients were given a course of proton pump inhibitors and results were evaluated. All urease test positive patients were divided into two groups. One group was given a course of proton pump inhibitors and another group was given a course of triple therapy and the results were compared. Results: A total number of 704 laryngopharyngeal reflux patients were screened for urease test. Among them 138 patients (19.6 %) were urease test negative and were given proton pump inhibitor therapy. Improvement in both reflux finding score (average score 11.75) and reflux symptom index (average score 5.25) score was observed after 3 months with p-value<0.05. In urease test positive patients, improvement in scores was observed in both proton pump inhibitors and triple therapy group, however marked improvement in the clinical features was observed in triple therapy group with p-value<0.05. Conclusions: The study reveals association between laryngopharyngeal reflux and Helicobactor pylori. Proton pump inhibitor therapy is sufficient if no Helicobactor pylori is detected, however incase of presence of Helicobactor pylori, triple therapy gives better results. Keywords: Helicobacter pylori; laryngopharyngeal reflux disease; rapid urease test

Analysis of the potential correlation between gastric cancer and gastrointestinal microbiota via in-silico data mining

Background Emerging evidence shows the gastrointestinal microbiome might play an important role in the carcinogenesis of gastric cancer. While Helicobactor pylori has been reported to be a specific risk factor of gastric cancer, it is still controversial whether significant difference of non- H. pylori microbiota exists between gastric cancer patients and healthy control.Results In this study, we employed multiple bioinformatic databases to excavate the potential correlation between gastrointestinal microbiome and gastric cancer. The databases involved in this investigation include HMDB, STITCH, OMIM, GWAS Catalog, WebGestalt, Toppgene, GeneMANIA. In addition, the network diagrams were built by use of Cytoscape software. Notably, our results showed that 33 common genes participate in both gastrointestinal microbiome and gastric cancer. The further analysis of these common genes suggested that there was a wide array of interactions and pathways in which the correlation between gastrointestinal microbiome and gastric cancer is involved.Conclusions Our present study gives a bioinformatic insight into possible pathways in which the gastrointestinal microbiome play roles in gastric cancer. Future efforts are necessary to be paid to elicit the exact mechanisms as well as potential therapeutic targets of gastric cancer.

Analysis of the potential correlation between gastric cancer and gastrointestinal microbiota via in-silico data mining

Background: Emerging evidence shows the gastrointestinal microbiome might play an important role in the carcinogenesis of gastric cancer. While Helicobactor pylori has been reported to be a specific risk factor of gastric cancer, it is still controversial whether significant difference of non- H. pylori microbiota exists between gastric cancer patients and healthy control.Results: In this study, we employed multiple bioinformatic databases to excavate the potential correlation between gastrointestinal microbiome and gastric cancer. The databases involved in this investigation include HMDB, STITCH, OMIM, GWAS Catalog, WebGestalt, Toppgene, GeneMANIA. In addition, the network diagrams were built by use of Cytoscape software. Notably, our results showed that 33 common genes participate in both gastrointestinal microbiome and gastric cancer. The further analysis of these common genes suggested that there was a wide array of interactions and pathways in which the correlation between gastrointestinal microbiome and gastric cancer is involved.Conclusions: Our present study gives a bioinformatic insight into possible pathways in which the gastrointestinal microbiome play roles in gastric cancer. Future efforts are necessary to be paid to elicit the exact mechanisms as well as potential therapeutic targets of gastric cancer.

Double Perforated Kissing Ulcers of Duodenum: A Brief Report

Helicobactor pylori infection has been associated with peptic ulcer disease and is currently treated with proton pump inhibitors (PPIs), which have reduced the complications of the disease. Perforation of either a gastric or duodenal ulcer is rarely treated with surgery. We report the case of double-perforated synchronous duodenal ulcers, which is an extremely infrequent condition. To our knowledge, no English case reports have yet been published. Therefore, awareness of the physician in the field of diagnosis and treatment of this peptic ulcer is required. We report the case of a 46-year-old male patient who presented with acute abdominal pain at the emergency surgical department of our hospital. According to patient history, smoking, alcohol consumption, and frequent postprandial abdominal pain were noted. A physical examination revealed a rigid abdomen and tachycardia, and the temperature was 37.8°C. Laboratory testing showed increased levels of leukocytes, and free subdiaphragmatic air was found in the chest X-ray. Due to rapid deterioration of his clinical condition, the patient underwent urgent surgery. An explorative laparotomy showed 2 perforated kissing ulcers at the first segment of the duodenum, in the anterior and posterior walls. A peripheral gastrectomy was performed. Postoperative follow-up did not result in any complications. In regard to this case we present, simultaneous perforation of two synchronous duodenal ulcers is an uncommon but possible incident of which the clinician should be aware. To our knowledge, this is the first case published in the literature.