Phytochemical constituents and antibacterial activities of indigenous chewing stick (Anogeissus leiocarpus) stem

The stems from Anogeissus leiocarpus are commonly used as chewing sticks in Northern Nigeria. If properly used, the chewing sticks have proven to be effective in removing dental plaque due to mechanical cleaning and enhanced salivation. Chewing sticks from other plants have been shown to display antimicrobial activities against a broad spectrum of microorganisms. However, there is limited information available in Northern Nigeria on the chemical composition, antimicrobial properties and the ability of the plants under study to prevent bacterial adhesion to tooth surface. Therefore, the purpose of this study was to ascertain the phytochemical and antibacterial properties of Anogeissus leiocarpus and correlate the results obtained to their ethnomedicinal uses as chewing sticks. Powdered stem was exhaustively extracted using methanol at room temperature for 72 hours. Antibacterial activities of the methanol extract was assessed using the agar well diffusion methods against the oral pathogens, Staphylococcus aureus, Streptococcus salivarius, Streptococcus pyogenes, Streptococcus mutans and Streptococcus sanguinis. Acute toxicity study was achieved using Lorke method. Phytochemicals which include flavonoid, steroid, triterpenes, alkaloids, tannins, carbohydrate, glycoside, phenols were detected in the extracts while anthraquinones was absent. The antibacterial results revealed that, the methanol extract had promising antibacterial activity. S. aureuswas found to be the most susceptible bacteria at 500mg/ml with inhibition of 22 mm, Streptococcus salivarius, Streptococcus pyogenes and Streptococcus sanguinis were inhibited at 16 mm while Streptococcus mutans showed inhibition of 14 mm. The extract have MIC and MBC of 31.25 mg/ml and 62.5 mg/ml respectively against all the tested clinical isolates. The LD50 of Anogeissus leiocarpus was found to be greater than 5000 mg/kg and could be considered safe for consumption.

Characterization of Streptococcus salivarius as New Probiotics Derived From Human Breast Milk and Their Potential on Proliferative Inhibition of Liver and Breast Cancer Cells and Antioxidant Activity

Breast milk is well known as the abundant source of beneficial bacteria. A new alternative source of human probiotic origin from breast milk is in demand and currently of interest for both the functional food industry and biopharmaceuticals. The aim in this study was to investigate the anticancer and antioxidant efficacies of the new potential probiotics isolated from human breast milk. Three strains of lactic acid bacteria (LAB) have shown their potential probiotic criteria including antimicrobial activity, non-hemolytic property, and survival in acid and bile salt conditions. These strains showed high abilities on cell surface hydrophobicity, auto-aggregation, and co-aggregation. The genera identification by 16S rRNA sequencing and comparison revealed that they were Streptococcus salivarius BP8, S. salivarius BP156, and S. salivarius BP160. The inhibition of liver cancer cells (HepG2) and breast cancer cells (MCF-7) proliferation by these probiotic strains using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was 44.83–59.65 and 29.85–37.16%, respectively. The probiotic action mode was inducted via apoptotic mechanisms since they stimulate the liver and breast cancer cell death through DNA fragmentation and positive morphological changes by acridine orange (AO) and propidium iodide (PI) staining. The antioxidant activity of these probiotics in the form of intact cells, cell free supernatant (CFS), and heat-killed cells was evaluated by a 2,2–diphenyl–1–picrylhydrazyl (DPPH) assay, resulting in the scavenging activity rates of 16.93–25.43, 15.47–28.03, and 13.67–23.0%, respectively. These S. salivarius probiotic strains protected the L929 mouse fibroblasts against oxidative stress with very high survival rates at 94.04–97.77%, which was significantly higher (P < 0.05) than L-ascorbic acid at 75.89–78.67% in the control groups. The results indicated that S. salivarius BP8 and S. salivarius BP160 probiotic strains could be applied as functional foods or new alternative bioprophylactics for treating liver and breast cancers.

Efficacy Of Oral Probiotic Streptococcus Salivarius K12 In The Prevention Of Halitosis (Bad Breath): A Systematic Review

Halitosis (bad breath) describes the foul and repulsive odours detected in the breath of people. Oral commensal probiotic Streptococcus salivarius K12 (BLIS K12TM) has been recognised to offer potential benefit in oral health. This is due to its ability to colonise the oral cavity and ward off pathogens implicated causing oral and dental ailment such as halitosis. The aim of this systematic review was to search and analyse 1) the published literature on orally targeted S. salivarius probiotic strain K12 and 2) its effects in conjunction with oral hygiene measures in reduction of halitosis. The research questions were formulated according to the PICO strategy. A broad search for published articles was conducted using the electronic databases such MEDLINE through PubMed, SciFinder and Web of Science by two independent reviewers. The quality of the studies was assessed using the JADAD scale and the risk of bias was assessed according to the Cochrane Collaboration assessment tool. A total of 335 articles related to S. salivarius K12 were identified. Of these articles, after manually filtering out duplicates, 157 articles were identified as unique. All unique articles were screened on their titles and abstracts and another 154 were excluded. The full text of the remaining 3 articles were reviewed with relevance to halitosis were included in this review. The overall risk of bias of the selected trials was found to be of low risk. Studies with S. salivarius K12 demonstrated a significant reduction in halitosis parameters in conjunction with routine oral hygiene practices, especially when the application of the probiotic was combined with a pre-treatment of a strong mouthwash.

The role of bacteriotherapy in the restoration of the nasal mucosa in patients with chronic rhinosinusitis

Topicality: Chronic rhinosinusitis is an polyetiological disease with shch basic complaints as nasal obstruction, nasal discharge, headache or facial pain and reduction of smell. The SNOT-22 questionnaire is widely used to detail patient complaints in various fields. Chronic rhinosinusitis is most often divided into chronic rhinosinusitis with polyps and without nasal polyps. Given the large number of phenotypes and endotypes of the disease, it is important to study further the mechanisms of pathogenesis and selec- tion of individualized treatment. Aim: to determine the role of topical application of Streptococcus salivarius 24SMBc and Streptococcus orals 89a in the form of nasal spray in improving the condition of the nasal mucosa in chronic rhinosinusitis and reducing the recurrence rate. Materials and methods: The study was conducted at the Department of Otolaryngology of National Medical University on the basis of KNP "Oleksandrivs’ka Clinical Hospital of Kyiv". It was attended by 82 patients (38 women and 44 men) aged 18 to 60 years, who were randomly divided into two groups. The 1st group (main, 43 patients) received treatment: irrigation therapy with isotonic saline, topical corticosteroid mometasone furoate in combination with a nasal spray, which contains autochthonous saprophytes (AC) – Streptococcus salivarius 89SMBc and Streptococcus orals 89a nasal mucus. The 2nd group (control, 39 patients) received nasal saline irrigation therapy, topical corticosteroid mometasone furoate in combination with topical antibiotic framicetin sulfate. Assessment was performed according to the VAS scale, SNOT-22 questionnaire (before treatment, on the 10th day of treatment and one month after the end of therapy) and determining the frequency of relapses in patients of both groups. Results: According to the obtained results, the indicators of patients of both groups before treatment and on the 10th day had no statistically significant difference (p>0.05). However a month later patients in the main group had better results (p<0.05) on the scale of VAS and the SNOT-22 questionnaire. So, topical use of Streptococcus salivarius 24SMBc and Streptococcus orals 89a as a nasal spray is effective and can be recommended for the treatment of patients with chronic rhinosinusitis in the acute stage.

Draft Genome Sequence of Streptococcus salivarius AGIRA0003, Isolated from Functional Gastrointestinal Disorder Duodenal Tissue

Patients suffering functional dyspepsia symptoms have been shown to possess a greater relative abundance of Streptococcus compared to asymptomatic controls. Here, we describe the isolation and genomic features of a new Streptococcus isolate, from the duodenal tissue of a subject reporting dyspeptic symptoms, taxonomically assigned to Streptococcus salivarius and designated strain AGIRA0003.