Genistein ameliorated experimentally induced gastric ulcer in rats via inhibiting gastric tissues fibrosis by modulating Wnt/β-catenin/TGF-β/PKB pathway

OBJECTIVES

Gastric ulcer (GU) is a prevalent chronic digestive disease affecting about 10% of the world's population leading to gastrointestinal perforation and bleeding. Genistein is a legume flavonoid with antioxidants, anti-inflammatory and antibacterial activities. Therefore, we aimed to investigate the ability of genistein to reduce experimentally induced GU in rats by affecting gastric tissue fibrosis Wnt/β-catenin/TGF-β/SMAD4 pathway.

METHODS

Thirty rats were used. Ten rats served as control, and GU was induced in twenty rats using a single dose of indomethacin (80 mg/kg) orally. Following induction of GU, ten were treated with genistein 25 mg/kg orally. The gastric tissues were isolated to investigate markers of gastric fibrosis, Wnt, β-catenin, transforming growth factor (TGF)-β, SMAD4, and Protein kinase B (PKB). In addition, gastric sections were stained with PAS and anti-TGF-β antibodies.

RESULTS

Investigation GU micro-images revealed degeneration in both surface cells and glandular epithelial cells, which was improved by genistein. In addition, treatment with genistein significantly reduced the expression of Wnt, β-catenin, TGF-β, SMAD4, and PKB.

CONCLUSION

Besides antioxidant activity, genistein improves experimentally induced GU in rats, at least in part, via reduction of gastric tissue fibrosis as indicated by reduction in expression of Wnt, β-catenin, TGF-β, SMAD4, and PKB.

Curative effects of fucoidan on acetic acid induced ulcerative colitis in rats via modulating aryl hydrocarbon receptor and phosphodiesterase-4

Background

Ulcerative colitis (UC) is an inflammatory bowel disease. Fucoidan, sulfated polysaccharide of brown seaweed, demonstrates various pharmacological actions as anti-inflammatory, anti-tumor and anti-bacterial effects. Therefore, we opt to investigate the potential curative effects of fucoidan in experimentally induced UC in rats through modulating aryl hydrocarbon receptor (AhR), phosphodiesterase-4 (PDE4), nuclear factor erythroid 2-related factor 2 (Nrf2) and Heme Oxygenase-1 (HO-1).

Methods

UC was induced in rats using intracolonic 2 ml of 4% acetic acid. Some rats were treated with 150 mg/kg fucoidan. Samples of colon were used to investigate gene and protein expression of AhR, PDE4, Nrf2, HO-1 and cyclic adenosine monophosphate (cAMP). Sections of colon were stained with hematoxylin/eosin, Alcian blue or immune-stained with anti-PDE4 antibodies.

Results

Investigation of hematoxylin/eosin stained micro-images of UC rats revealed damaged intestinal glands, severe hemorrhage and inflammatory cell infiltration, while sections stained with Alcian Blue revealed damaged and almost absent intestinal glands. UC results in elevated gene and protein expression of PDE4 associated with reduced gene and protein expression of AhR, IL-22, cAMP, Nrf2 and HO-1. Finally, UC increased the oxidative stress and reduced antioxidant activity in colon tissues. All morphological changes as well as gene and protein expressions were ameliorated by fucoidan.

Conclusion

Fucoidan could treat UC induced in rats. It restored the normal weight and length of colon associated with morphological improvement as found by examining sections stained with hematoxylin/eosin and Alcian Blue. The curative effects could be explained by enhancing antioxidant activity, reducing the expression of PDE4 and increasing the expression of AhR, IL-22 and cAMP.

The therapeutic effects of cycloastragenol in ulcerative colitis by modulating SphK/MIP-1α/miR-143 signalling

Patients with ulcerative colitis (UC) experience diarrhoea, hematochezia, and abdominal pain. UC is a well-known health challenge affecting 200-250 per 100,000 individuals worldwide, with a similar prevalence in both sexes and elevated upon activation of gut immune responses. We evaluated the potential therapeutic effects of cycloastragenol in experimentally-induced UC rats and examined the modulation of sphingosine kinase (SphK), macrophage inflammatory protein (MIP)-1α, and miR-143. We treated UC rats with 30 mg/kg cycloastragenol and assessed gene and protein expression levels of SphK, MIP-1α, B-cell lymphoma 2 (BCL2), BCL2-associated X (BAX), miR-143, NF-κB, tumour necrosis factor (TNF)-α, and active caspase-3. Colon sections were examined using electron microscopy; additional sections were stained with hematoxylin-eosin or immunostained with anti-TNF-α and anti-caspase-3 antibodies. Electron microscopy of UC specimens revealed dark distorted goblet cell nuclei with disarranged mucus granules and a non-distinct brush border with atypical microvilli. Hematoxylin-eosin staining showed damaged intestinal glands, severe hemorrhage, and inflammatory cell infiltration. Cycloastragenol treatment improved the induced morphological changes. In UC rats, cycloastragenol significantly reduced expression levels of SphK, MIP-1α, BAX, NF-κB, TNF-α, and active caspase-3, associated with BCL2 and miR-143 overexpression. Therefore, cycloastragenol protects against UC by modulating SphK/MIP-1α/miR-143, subsequently deactivating inflammatory and apoptotic pathways.

Behavioral Changes in Gym Attending Due to COVID-19 Pandemic: A Descriptive Survey

Introduction:

On the declaration of the COVID-19 pandemic lockdown clearance in Saudi Arabia, the high-profile precautions were applied as a major step to resume the normal life activities and to coexist with the pandemic. One of those resumed activities is the reopening of the gym and fitness centers. The perception and the commitment with safe precautions in terms of personal hygiene and sterilization have dramatically changed due to the COVID-19 pandemic. The purpose of this study was to assess the behavior of gym attendees toward preventive precautions prior to the pandemic and the behavioral changes that will be accommodated after the new policy and procedure of attending a gym and fitness centers.

Methods:

A cross-sectional descriptive study was conducted in February 2020, a 1 month prior to the complete lockdown announcement in Saudi Arabia as a result of the COVID-19 pandemic outbreak. An electronic questionnaire was provided during a personal interview with gym and fitness centers' participants.

Results:

The majority of participants never use sterile wipes or any sterile product before or after using gym equipment (61.6%), and 35.4% of gym attendants do not use any sterilization materials distributed through fitness centers. In addition, most of the participants have had an episode of skin infections or respiratory infection at the fitness center for the past 12 months (22.2%), whereas 80.8% do not know about tinea microbial that causes athlete's foot, and 65.7% of them utilize the shower in the gym after their workout.

Conclusion:

The lack of awareness of previous and new gym members regarding safety precautions during indoor exercise should be overcome by more future educational intervention and emphasizing on following the Ministry of Sports in Saudi Arabia, even after the complete clearance of COVID-19 pandemic.

The Natural Polypeptides as Significant Elastase Inhibitors

Human neutrophil elastase (HNE) is a major cause of the destruction of tissues in cases of several different chronic andinflammatory diseases. Overexpression of the elastase enzyme plays a significant role in the pathogenesis of various diseases including chronic obstructive pulmonary disease (COPD), acute respiratory distress syndrome, rheumatoid arthritis, the rare disease cyclic hematopoiesis (or cyclic neutropenia), infections, sepsis, cystic fibrosis, myocardial ischemia/reperfusion injury and asthma, inflammation, and atherosclerosis. Human neutrophil elastase is secreted by human neutrophils due to different stimuli. Medicine-based inhibition of the over-activation of neutrophils or production and activity of elastase have been suggested to mend inflammatory diseases. Although the development of new elastase inhibitors is an essential strategy for treating the different inflammatory diseases, it has been a challenge to specifically target the activity of elastase because of its overlapping functions with those of other serine proteases. This review article highlights the reported natural polypeptides as potential inhibitors of elastase enzyme. The mechanism of action, structural features, and activity of the polypeptides have also been correlated wherever they were available.

Association of Demographic Variables with the Awareness of Type 2 Diabetes Mellitus Patients (T2DM) among the Northwest Population in Saudi Arabia

The chronic hyperglycemia in diabetes is associated with long-term damage, dysfunction, and failure of different organs. Lack of patient education and knowledge about these complications can worsen the quality of a patient's life. Hence, more efforts are needed to improve patient's education especially in rural areas. Aim. Our objective is to explore the association between demographic variables and the knowledge of self-care practices in type 2 diabetes mellitus. Methods. We used observational cross-sectional descriptive study using a validated self-administered questionnaire in both Arabic and English languages as well. A descriptive correlation design analyzed the questionnaire completed by a convenience sample meeting the inclusion criteria. Results. A total of 100 patients met the inclusion criteria for the analysis out of 3251 patients who completed the questionnaire. The study population has low moderate knowledge in diabetes, moderate knowledge in self-care practices, and good knowledge about complications of nephropathy and cardiovascular disease. No significant association between demographic variables. However, better knowledge observed in male (p = 0.028) and self-care practices with female (p = 0.020). Further, educational status is significantly influencing the knowledge of diabetic patients. Conclusion. The study emphasizing irrespective of demographic variable and the importance of patient education to achieve well glycemic control.

Author Correction: Thymoquinone therapy remediates elevated brain tissue inflammatory mediators induced by chronic administration of food preservatives

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

The therapeutic effects of nicotinamide in hepatocellular carcinoma through blocking IGF-1 and effecting the balance between Nrf2 and PKB

Insulin growth factor (IGF) family and their receptors play a great role in tumors' development. In addition, IGF-1 enhances cancer progression through regulating cell proliferation, angiogenesis, immune modulation and metastasis. Moreover, nicotinamide is association with protection against cancer. Therefore, we conducted this research to examine the therapeutic effects of nicotinamide against hepatocellular carcinoma (HCC) both in vivo and in vitro through affecting IGF-1 and the balance between PKB and Nrf2. HCC was induced in rats by 200 mg/kg, ip thioacetamide. The rat survival, number and size of tumors and serum α-fetoprotein (AFP) were measured. The gene and protein levels of IGF-1, Nrf2, PKB and JNK-MAPK were assessed in rat livers. In addition, HepG2 cells, human HCC cell lines, were treated with different concentrations of nicotinamide. We found that nicotinamide enhanced the rats' survival and reduced the number and size of hepatic tumors as well as it reduced serum AFP and HepG2 cells survival. Nicotinamide ameliorated HCC-induced reduction in the expression of Nrf2. Moreover, nicotinamide blocked HCC-induced elevation in IGF-1, PKB and JNK-MAPK. In conclusion, nicotinamide produced cytotoxic effects against HCC both in vivo and in vitro. The cytotoxic activity can be explained by inhibition of HCC-induced increased in the expression of IGF-1 and leads to disturbances in the balance between the cell death signal by PKB and MAPK; and the cell survival signal by Nrf2, directing it towards cell survival signals in normal liver cells providing more protection for body against tumor.

Review of efficacy and safety of the new oral anticoagulants (NOACS) in the treatment of venous thromboembolism in gastrointestinal (GI) oncology patients

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Background: The occurrence of venous thrombosis (VTE) has been reported to increase the likelihood of death for cancer patients by 2- to 6-fold. Additionally, cancer patients have both a higher rate of VTE recurrence during oral anticoagulant therapy with warfarin and a higher anticoagulation-associated hemorrhagic risk as compared with non-cancer patients. New oral anticoagulants (NOACs) have administration and monitoring advantages treatment options for patients, however, there is limited data on the use of NOACs for cancer patients. Methods: We performed a single-institution retrospective review of electronic medical records of patients with GI cancer who received rivaroxaban with an active VTE diagnosis. Data collected included patient demographics, diagnosis, previous and active chemotherapy, previous history of VTE, and clinical outcomes. Results: Thirty-two patients were identified, with 28 patients concurrently treated with chemotherapy. Rivaroxaban was given to treat DVT = 23 patient and PE = 9 patients with average length of therapy 181 days. Forty-one percent of patients started on rivaroxaban, while 25% received enoxaparin, and 22% received warfarin prior to rivaroxaban. Overall, 13/32 (41%) patients experienced a bleeding episode; 7 patients had their dose held and 6 patients were noted to have minor bleeding. Conclusions: In our retrospective study, rivaroxaban did show efficacy in secondary prophylaxis for VTE in patients with active cancer. However our results revealed a rather high rate of bleeds in patients being treated with chemotherapy and rivaroxaban as compared to previous studies. [Table: see text]