HBV: Genomic Structure, HBVsAg Isolation and innovative Virotherapy Initiation in the Middle East
Published on: 9th August, 2017
OCLC Number/Unique Identifier: 7286354687
Hepatitis B virus (HBV) is one of the world’s major infectious diseases with 350 million people who are chronic carriers of HBV [1]. Significant minorities go on to develop liver cirrhosis or hepatocellular carcinoma and over 1 million die annually from HBV-diseased liver. Janahi E. at faculty of science, Bahrain University, Bahrain has submitted the following information [2], on HBV-genome organization as part of his Ph.D. degree (2007) in Imperial College, England. HBV genomic organization has 4 Open Reading Frames (ORFs) i.e. Pre-S/S Gene, Pre-C/C ORF, P ORF and X ORF. Regulatory Elements has 4 promoters (pre S2, pre S1, C promoters and X promoters), Pregenomic RNA, Enhancers (Enh 1 and Enh 2) where they are involved in cccDNA formation, Glococorticoid-Responsive Element which is located in X ORF and P ORF overlapping, Polyadenylation Signal (Direct Repeat 1 (DR1) and Direct Repeat 2 (DR2)), Epsilon-Stem Loop and Post-Transcriptional Regulatory Element. HBV genotype D is prevalent in our Middle East area. The HBV genome is a partially relaxed-circular dsDNA molecule consisting of a full length strand (minus strand) with a single unique nick and a complementary (positive strand) of variable length. HBV is considered as a para-retrovirus because its replication involves the reverse transcription of an intermediate-RNA function, of pre-genomic RNA (pgRNA). Replication of HBV genome starts with the encapsidation of the pgRNA and encodes HBV polymerase into an immature nucleocapsid formed by the viral core antigen.
Role of polyamine metabolism in plant pathogen interactions
Published on: 7th December, 2017
OCLC Number/Unique Identifier: 7286426514
Polyamines are aliphatic amines found in all living cells, and they are necessary for several fundamental cell processes. Their protective role against various abiotic stress factors has been reported in different plant species, while the mechanism by which polyamines act during plant-microbe interaction is still poorly understood. The several types of the interactions between the plants and the microbes outline a divers and complex picture of the action mechanisms. The present review focuses on this aspect of the mode of action of polyamines and polyamine metabolism during biotroph and necrotroph interactions between plants and pathogens. It seems that apoplastic metabolism of polyamines of the host and the accumulation of H2O2 as a result of polyamine catabolism play important signalling role in plant-pathogen interactions. The manipulation of the members of the polyamine-induced signalling pathways could increase the host plant resistance to biotic stresses.
The Fundamental Role of Dissolved Oxygen Levels in Drinking Water, in the Etiopathogenesis, Prevention, Treatment and Recovery of Cerebral Vascular Events (Stroke)
Published on: 16th January, 2025
Stroke is a clinically defined syndrome of acute focal neurological deficit attributed to vascular injury (infarction, hemorrhage) of the central nervous system. Stroke is the second leading cause of death and disability worldwide. Stroke is not a single disease but can be caused by a wide range of risk factors, disease processes and mechanisms. Approximately 15% of strokes worldwide are the result of intracerebral hemorrhage, which can be deep (basal ganglia, brainstem), cerebellar or lobar. A minority (about 20%) of intracerebral hemorrhages are caused by macrovascular lesions (vascular malformations, aneurysms, cavernomas), venous sinus thrombosis or rarer causes.
Efficacy of Sequential Applications of Pendimethalin 500 EC (Pendimight®) and Oxyfluofen 240 EC (Harris®) for Weed Control in Direct Seeded Onion (Allium cepa L.) in Sudan
Published on: 26th June, 2024
A field study was carried out to evaluate the efficacy of pendimethalin 500 EC (trade name: Pendimight®) and oxyfluorfen 240 EC (trade name: Harris®) to control weeds in direct-seeded onion (Allium cepa L.). Pendimethalin and oxyfluorfen were applied solely at reduced rates (1.35 and 0.17 kg a.i. ha-1), and at the recommended rates (1.8 and 0.25 kg a.i. ha-1) as pre-and post-emergence herbicides, respectively. Both herbicides were also applied sequentially at the same doses. Ten weeks after sowing (WAS), the application of pendimethalin alone provided better weed control (62% - 65%) than oxyfluorfen alone (33% - 43%) when they were applied at the lower and recommended rates, respectively. Sequential applications of the two herbicides as pre-and post-emergence herbicides, outperformed applications of the two herbicides alone, and resulted in the best weed control (79% to 85%), lowest weed dry weight (18.35 to 35.60 g.m-2), significantly increased plant height and the number of leaves per plant, and resulted in a ten-fold higher onion yield (24.64 to 26.37 t. ha-1) compared with the Un-weeded control (2.27 t. ha-1). There were no significant differences observed between the treatments on the emergence (%) of onion seeds and the survival of onion seedlings. Sequential applications of pendimethalin and oxyfluorfen is a promising techniques for weed control in direct-seeded onions in Sudan.
Gallstone Ileus: A Rare Case of Intestinal Obstruction, Presented in a Chronic Kidney Disease Patient on Haemodialysis
Published on: 5th February, 2025
The prevalence of gallbladder stones is higher in Chronic Kidney Disease (CKD) patients and it has been shown to increase with the advancement of the disease stage, from 7.7% in stage 1% to 21.3% in stage 5. Gallstone ileus is a rare complication which presents in just 0.3% - 0.5% of patients with cholelithiasis. A 61-year-old female patient, with a known case of CKD on maintenance hemodialysis, (thrice a week) with primary disease of hypertensive and diabetic nephropathy; presented with multiple episodes of loose stool, vomiting, and diffuse abdominal pain for 2 days. Abdomen Ultrasonography (USG) was suggestive of intestinal obstruction. CT abdomen with oral contrast revealed grossly dilated jejuna loops with air-fluid levels and transition zone in the pelvis, in distal jejunal loops/proximal ileum with ovoid intraluminal filling defect cystic polyp and collapsed bowel loops. The patient underwent exploratory laparotomy in view of persistent small bowel obstruction. Resection and anastomosis of the mass-bearing small bowel segment were performed. On cutting and opening the specimen, a large stone was revealed. This gallstone was causing bowel obstruction-gall stone ileus. A gallstone 2.6 cm x 2.1 cm has traversed through a cholecysto-duodenal fistula and got stuck in the proximal ileum, causing small bowel obstruction. The lesson learned is uraemia can cause gastrointestinal symptoms like anorexia, abdominal pain, vomiting, and ileus and hence mimic serious differentials of the acute abdomen like gallstone ileus. Thus no stone should be left unturned especially when the prevalance of gallstones is high in chronic kidney disease patients.
Regional Anesthesia Challenges in a Pregnant Patient with VACTERL Association: A Case Report
Published on: 26th March, 2025
VACTERL (V: Vertebral anomalies, A: Anal malformation, C: Cardiac defect, TE: Tracheoesophageal malformation, R: Renal anomalies, L: Limb anomalies) is a cluster of congenital malformations. It is a rare association with sporadic and non-random occurrence where multiple organs are affected due to developmental defect during blastogenesis (2-4 weeks of gestation), where abnormal structures are derived from the embryonic mesoderm. Multiple environmental and genetic factors have been implicated. We report the successful management of a patient with VACTERL association born to a mother through an emergency cesarean section due to fetal distress.
Validation of Prognostic Scores for Attempted Vaginal Delivery in Scar Uterus
Published on: 11th April, 2025
Introduction: The rise in cesarean section rates globally has led to a growing population of women with uterine scars, necessitating more targeted obstetric care in subsequent pregnancies. These women are faced with the decision of attempting vaginal delivery after cesarean section (VBAC) or opting for an elective repeat cesarean section. The likelihood of a VBAC depends on various factors both maternal and fetal, gathered in two known scores Grobman and Zhang, utilizing them could make VBAC successful and more widely attempted. This study aims to validate the prognostic of these scores in a Moroccan population.Objectives:• Validate the international predictive scores (Grobman and Zhang) for the probability of a successful VBAC in the Moroccan population.• Explore additional criteria specific to the Moroccan population and develop a simplified VBAC score. Results:• Out of 2,973 women with a cesarean history, 313 attempted TOLAC, 79% of these attempts were successful VBAC.• The characteristics of successful VBAC included lower BMI, previous vaginal birth, lower estimated fetal weight, younger maternal age, and more favorable cervical conditions at admission.• The Grobman and Zhang scores showed good predictive accuracy, with both models achieving 82.2% accuracy.• When dividing women into groups based on predicted success (using both Grobman and Zhang scores), significant differences were found in success rates across different probability categories.Conclusion: Both Grobman and Zhang’s models were effective in predicting VBAC success in the Moroccan population, with a slight preference for the Zhang model. However, further research is needed to validate these models in clinical practice. It could involve developing a more population-specific model.
Wealth in Water: A Blueprint for Sustainable Global Ocean Research
Published on: 19th June, 2024
Pushing forward with leveraging water resources, promoting international cooperation, and ensuring transparency in deep-sea mining operations. There is also a concern about where to discharge the toxins of unpurified water. Artificial Intelligence has created a dominance in the applications field with a totally automated system.Out of a thorough analysis completed with indicators, satellite radar, and A Journals, there are 30 years of research and 8 years of monitored testing to achieve accuracy and relevance. The patents in place are, Oceanic Mining System (4446636), Flexible Solar Skin in Combination with an Airplane (4768738), Cargo Torpedo (4421050), Oceanic seaplow system (4398362), and previous articles like “Is Extracting Lithium and deep-sea mining more sustainable?”, “AI as a Means of Water Purification Protection”, “Global Water Distribution”, and “Can Deep Sea Water be Processed into Potable Water and Distributed into the Middle East’?To report some ballpark numbers on the proposal and how we would navigate these projects, there will be an exact location of where the plant will be built as well as a water/salinity report of the water being treated. There are still issues with analyzing the cost of desalination compared to other alternatives. Deep Sea Water proves to be a higher quality water and the investment is well worth it. The surveys lean toward clients preferring the International Standards Operating Procedure. All recipients agree there should be a sense of urgency on water shortages. Currently, AI has proven to be a vital asset in eliminating biases and expenses.
A Rare Case Report: Spinal Metastasis of Anaplastic Pleomorphic Xanthoastrocytoma
Published on: 27th January, 2025
Anaplastic Pleomorphic Xanthoastrocytoma is a very rare tumor of the Central Nervous System (CNS). BRAFV600E mutation is a common mutation in pleomorphic xanthoastrocytoma. We present a 52-year-old male patient who underwent total resection due to a temporal lobe mass. The primary tumor in the temporal lobe was given postoperative radiotherapy. During follow-up, genetically and histologically proven metastasis was detected in the paraspinal region. The adjuvant RT was given to metastasis after surgery. The patient, who used the combination of dabrafenib and trametinib after recurrence, is being monitored in remission.
Dengue Epidemic during COVID-19 Pandemic: Clinical and Molecular Characterization – A Study from Western Rajasthan
Published on: 1st April, 2025
The concurrent emergence of dengue fever and the COVID-19 pandemic posed significant challenges to India’s healthcare system, particularly in Western Rajasthan, a region characterized by its arid climate and unique socio-demographic conditions. This study aimed to investigate the clinical and molecular characteristics of dengue during the COVID-19 pandemic, focusing on trends, diagnostic challenges, and serotype distribution. Conducted at Dr. S.N. Medical College, Jodhpur, in 2021, the study included 550 dengue-positive patients confirmed via rapid diagnostic tests and further analyzed using Dengue NS1 antigen and IgM antibody ELISA. Molecular characterization was performed using RT-PCR for serotyping.The results revealed a male predominance (72.36%) and a higher incidence in the 21–30-year age group (39.09%). Urban areas accounted for 67.73% of cases, with significant NS1 and IgM positivity (p = 0.042 and p = 0.004, respectively). Most cases (86.91%) were managed outpatient, though IgM positivity was significantly higher among hospitalized patients (19.19%, p < 0.001), indicating severe or prolonged infections. Platelet counts were above 100,000/mm³ in 86.91% of cases, with only 0.37% showing critically low counts (< 20,000/mm³). Seasonal analysis showed a peak in October (n = 325), correlating with post-monsoon vector breeding. Serotyping identified DENV2 as the dominant strain (97.42%), associated with severe dengue manifestations, including Dengue Haemorrhagic Fever (DHF).The study highlights the dual burden of dengue and COVID-19, emphasizing the need for enhanced vector control, improved diagnostic strategies and public health interventions during overlapping outbreaks. The predominance of DENV2 underscores the importance of serotype-specific surveillance and preparedness to mitigate future dengue epidemics in the region.
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