Overpopulation and lack of resources have become serious problems in recent years. Therefore, there is an urgent need to find renewable sources of food to confront this problem. Aquaculture is an inexpensive and important source of protein, as aquaculture have increased significantly, especially during the past two decades. The wastewater produced from those farms includes many harmful elements such as ammonia (NH3), organic matter (OM), phosphorous(P) and dissolved organic carbon (DOC). So, it has become necessary to find an appropriate method to treat the wastewater produced from those farms. There are many ways to treat wastewater from fish farms, including physical, chemical or biological methods. Biological treatment is one of the best methods used in wastewater treatment from aquaculture, as it is environmentally friendly and less expensive than other methods. The biofiltration process depends on the use of microorganisms that convert ammonium (NH4+) to nitrite (NO2-) and then to nitrate (NO3-), and this is done using a Recirculating Aquaculture Systems (RASs). The main component of the biofilter is the filter media, which can be compost, wood chips, beads, other organic or inorganic materials. There are many types of microorganisms used to treat wastewater like Microalgae, bacteria, fungi, yeast. The choice of the type of microorganism used depends on the chemical nature of the pollutants.

BACKGROUND AND STUDY AIMS: Chronic hepatitis B (CHB) infection is a major risk factor for hepatocellular carcinoma (HCC). The RECK gene is a critical tumor suppressor gene. This study aimed to assess the association between RECK gene single nucleotide polymorphisms (SNPs) and the development of HCC in Egyptian patients with chronic hepatitis B.

PATIENTS AND METHOD: In this case-control study, we enrolled patients with CHB from the Gastroenterology Department, Benha University, from June 2016 to February 2018. The RECK gene SNP rs10814325 was identified using real-time PCR allelic discrimination via TaqMan SNP genotyping assays (Applied Biosystems, USA).

RESULTS: We enrolled 140 participants in this study. The participants were divided into Group I, which comprised 50 participants with CHB only, Group II, which comprised 50 participants with CHB and HCC, and Group III, which comprised 40 healthy participants. A significantly higher hepatitis B virus DNA viremia level was found in patients with HCC. The predominant RECK genotype was the T/T allele, followed by the T/C allele; however, no significant difference in the distribution of RECK gene SNPs was found between the study groups. No statistically significant difference in RECK gene SNPs was reported among patients with HCC of different Child classes or based on the number, site, size of HCC, and lymph node involvement. Receiver operating characteristic curves showed that a serum alpha-fetoprotein level of 92 ng/ml was 96 % sensitive and 100 % specific for the detection of HCC, with an area under the operating characteristic curve of 0.98.

CONCLUSION: RECK gene SNPs have no significant association with the development and characteristics of hepatitis B-related HCC in Egyptian patients.

Alzheimer's disease (AD) is the most common neurodegenerative disorder in the world, affecting an estimated 50 million individuals. The nerve cells become impaired and die due to the formation of amyloid-beta (Aβ) plaques and neurofibrillary tangles (NFTs). Dementia is one of the most common symptoms seen in people with AD. Genes, lifestyle, mitochondrial dysfunction, oxidative stress, obesity, infections, and head injuries are some of the factors that can contribute to the development and progression of AD. There are just a few FDA-approved treatments without side effects in the market, and their efficacy is restricted due to their narrow target in the etiology of AD. Therefore, our aim is to identify a safe and potent treatment for Alzheimer's disease. We chose the ursolic acid (UA) and its similar compounds as a compounds' library. And the ChEMBL database was adopted to obtain the active and inactive chemicals against Keap1. The best Quantitative structure-activity relationship (QSAR) model was created by evaluating standard machine learning techniques, and the best model has the lowest RMSE and greatest R2 (Random Forest Regressor). We chose pIC50 of 6.5 as threshold, where the top five potent medicines (DB06841, DB04310, DB11784, DB12730, and DB12677) with the highest predicted pIC50 (7.091184, 6.900866, 6.800155, 6.768965, and 6.756439) based on QSAR analysis. Furthermore, the top five medicines utilize as ligand molecules were docked in Keap1's binding region. The structural stability of the nominated medications was then evaluated using molecular dynamics simulations, RMSD, RMSF, Rg, and hydrogen bonding. All models are stable at 20 ns during simulation, with no major fluctuations observed. Finally, the top five medications are shown as prospective inhibitors of Keap1 and are the most promising to battle AD.

3-Nitropropionic acid (3-NP) model serves as a beneficial tool to evaluate the effect of novel treatments for Huntington's disease (HD). The aim of the present study was to demonstrate the neuroprotective effect of recombinant human erythropoietin (rhEPO) and interferon-beta-1b (IFN-β-1b) in 3-NP-induced neurotoxicity in rats. Rats were injected with 3-NP (10 mg/kg/day, i.p) for 2 weeks and were divided into five subgroups; the first served as the HD group, the second received rhEPO (5000 IU/kg/every other day, i.p.) for 2 weeks, the third received rhEPO starting from the 5th day of 3-NP injection, the fourth received IFN-β-1b (300,000 units, every day other day, s.c) for 2 weeks, and the last received IFN-β-1b starting from the 5th day of 3-NP injection. All treatments significantly improved motor and behavior performance of rats. Moreover, all treatments markedly restored mitochondrial function as well as brain-derived neurotrophic factor level, and reduced oxidative stress biomarkers, pro-inflammatory mediators, nuclear factor kappa B expression, caspase-3, and Bax/Bcl2 ratio in the striatum. In conclusion, the present study demonstrates the neuroprotective potential of rhEPO or IFN-β-1b on 3-NP-induced neurotoxicity in rats. Furthermore, our study suggests that activation of JAK2/STAT3 or JAK1/STAT3 may contribute to the neuroprotective activity of rhEPO or IFN-β-1b, respectively. We also found that early treatment with rhEPO did not confer any benefits compared with late rhEPO treatment, while early IFN-β-1b showed a marked significant benefit compared with late IFN-β-1b.

Background: The World Health Organization Office for the Eastern Mediterranean Region (EMR), and a recently created palliative care experts’ network from the EMR, decided to develop region-specific indicators to monitor national palliative care development.

Aims: To identify relevant and feasible macroindicators of palliative care development for the EMR.

Methods: Palliative care experts from the EMR were nominated and invited to complete a 2-round Delphi study to rate macroindicators from previous studies and propose new ones based on regional characteristics. All indicators were assessed by regional relevance (R) and feasibility (F). A content validity index (CVI) was calculated. Indicators with CVI ≥ 0.7/1, and scoring ≥ 7/9 for the average of R and F were selected.

Results: Twelve of 22 countries were represented in the study. In the first round, 11 indicators were selected and 13 new ones proposed. In the second round, 15 indicators matched R, F and CVI criteria. Top-scored indicators were: existence of a current national palliative care strategy (R = 8, F = 8, CVI = 1); ratio of specialized services (for adults and children) in the country per population (R = 8, F = 7, CVI = 1); allocation of funds for palliative care in the national health budget by the Ministry of Health or equivalent government agency (R = 8, F = 6, CVI = 1); education for prequalification doctors/nurses (R = 8, F = 8, CVI = 0.9); and availability of morphine and other strong opioids (R =8, F = 8, CVI= 0.9).

Conclusion: A baseline set of 15 region-specific indicators for measuring development of palliative care were validated by regional experts.