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Karim A, Hafeeza B, Riaz S, Khwaja S, Shahzad MM, Akhter A. Assessment of aquatic macro-invertebrates communities and water quality parameters of River Zhob, Balochistan, Pakistan. BRAZ J BIOL 2024; 84:e265234. [DOI: 10.1590/1519-6984.265234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 07/29/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract Environmental stress caused by pollution is often assessed by diversity of macro-invertebrate species in specific aquatic habitat. To find out seasonal fluctuations in various macro-invertebrates communities and different water quality parameters of River Zhob, a research trial was conducted on River Zhob, Balochistan. Samples of macro-invertebrates and water were taken from four different stations of River Zhob. A total 18 taxa of various macro-invertebrates were identified from the area. Phylum Arthropoda constitute 94.8% of the total population followed by Mollusca (3.6%) and Annelida (1.4%). A large number of arthropods were belonged to order Diptera (1148), while the order Trichoptera was stood second with respect to macro-invertebrate´s number (441). The maximum numbers of macro-invertebrates were observed in the month of January. All physico-chemical parameters of River Zhob such as air temperature, water temp, pH, dissolved oxygen (DO) and total dissolved solids (TDS) were within the range, suitable for the healthy growth of macro-invertebrates. Diversified populations of various macro-invertebrates confirm good ecological condition of environment and water in the studied site especially ample concentration of DO in River. The documented data on macro-invertebrates in studied site will provide a baseline for future research.
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Affiliation(s)
- A. Karim
- Sardar Bahadur Khan Women’s University, Pakistan
| | - B. Hafeeza
- Sardar Bahadur Khan Women’s University, Pakistan
| | - S. Riaz
- University of Karachi, Pakistan
| | - S. Khwaja
- Federal Urdu University of Arts, Science and Technology, Pakistan
| | | | - A. Akhter
- Federal Urdu University of Arts, Science and Technology, Pakistan
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Saravanabavanandan R, Jaimalani A, Khan MAN, Riaz S, Mangas GDM, Ahsan SM, Posani S, Patel T, Fawad M, Al-Tawil M. Gender-Based Outcome Discrepancies in Patients Who Underwent Alcohol Septal Ablation or Septal Myectomy for Hypertrophic Obstructive Cardiomyopathy: A Systematic Review and Meta-Analysis. Am J Cardiol 2023; 208:134-142. [PMID: 37839170 DOI: 10.1016/j.amjcard.2023.09.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/02/2023] [Accepted: 09/06/2023] [Indexed: 10/17/2023]
Abstract
Clinical evidence and emerging studies suggest that the clinical heterogeneity observed in hypertrophic cardiomyopathy could be because of gender-based differences. We aimed to explore the gender-related differences pertaining to the treatment outcomes after alcohol septal ablation (ASA) and septal myectomy (SM). We searched PUBMED/MEDLINE, EMBASE, and SCOPUS to identify studies that report gender-stratified comparison of outcomes. The primary outcome of interest was short-term (within 30 days) mortality. A total of 15 studies totaling 31,907 patients (47% men and 53% women) were included. Women were found to be significantly older at the time of intervention (ASA: mean difference [MD] 7.55 years; SM: MD 4.41). In the ASA and SM treatment arms, women had a significantly higher risk of short-term all-cause mortality (ASA: risk ratio 0.48, 95% confidence interval 0.32 to 0.71, p = 0.0003; SM: risk ratio 0.63, 95% confidence interval 0.44 to 0.90, p = 0.01), more frequent permanent pacemaker implantation (ASA; p = 0.002, SM: p = 0.05), and longer in-hospital stay (ASA: MD 1.00 days, SM: MD 0.69). Among those who underwent ASA, women had a significantly higher rate of atrioventricular block. In conclusion, regardless of ASA or SM, women consistently presented at an older age and exhibited a higher risk-increased mortality rate, a greater incidence of atrioventricular block, and a higher likelihood of permanent pacemaker requirement-and longer hospital stay among women than men. This strongly emphasizes the need for a gender-specific approach to optimize care and improve treatment outcomes in hypertrophic cardiomyopathy.
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Affiliation(s)
| | - Aniket Jaimalani
- Department of Medicine, Surat Municipal Institute of Medical Education and Research, Surat, India
| | | | - Sania Riaz
- Department of Medicine, Allama Iqbal Medical College, Lahore, Pakistan
| | | | - Syed Muhammad Ahsan
- Dow Institute of Biological, Biochemical & Pharmaceutical Sciences, Dow University of Health Sciences, Karachi, Pakistan
| | - Sarojini Posani
- Department of Medicine, Sri Devaraj URS Medical College, Kolar, India
| | - Tirath Patel
- American University of Antigua College of Medicine, Saint John, Antigua and Barbuda
| | - Moiz Fawad
- Department of Neurosurgery, King Saud Hospital, Unayzah, Kingdom of Saudi Arabia
| | - Mohammed Al-Tawil
- Faculty, Department of Medicine, Al-Quds University, Jerusalem, Palestine
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Sajid B, Tufail Z, Asim M, Riaz S, Imtiaz S, Khan H, Shabbir MA, Shah SMB, Ejaz F, Anis MW, Khan A, Ahmed A, Rana M, Sohail F, Anjum MU, Larik MO. Comparison of Clopidogrel Versus Ticagrelor for Percutaneous Coronary Intervention (PCI) Patients Managed with Therapeutic Hypothermia: A Systematic Review and Meta-Analysis. Ther Hypothermia Temp Manag 2023. [PMID: 37870599 DOI: 10.1089/ther.2023.0055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2023] Open
Abstract
Various antiplatelet drugs, such as clopidogrel and ticagrelor, are available on the market for use after percutaneous coronary intervention (PCI). However, the efficacy of such drugs in patients being managed with therapeutic hypothermia (TH) has always been debated. In light of this controversy, this systematic review and meta-analysis was performed to enhance existing literature. Various databases were searched for potentially relevant studies from inception to April 2023, including PubMed, Cochrane Library, and Scopus. The risk of bias was assessed using the Newcastle-Ottawa scale for cohort studies and the Cochrane risk of bias tool for randomized controlled trials. Outcomes of interest included risk of bleeding, stent thrombosis, and all-cause mortality. Five studies were shortlisted for inclusion into the meta-analysis, featuring a total of 245 patients receiving either clopidogrel or ticagrelor. Overall, no significant differences were noted when the use of clopidogrel and ticagrelor was compared in PCI patients being managed with TH. To the best of our knowledge, this is the most comprehensive meta-analysis comparing the outcomes of clopidogrel and ticagrelor in PCI patients being managed with TH. Despite existing studies claiming an altered efficacy of clopidogrel in such conditions, our meta-analytic findings could not prove this relationship. Due to the limited sample size, further comprehensive and randomized studies are encouraged to arrive at a robust conclusion.
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Affiliation(s)
| | | | - Maria Asim
- Fazaia Ruth Pfau Medical College, Karachi, Pakistan
| | - Sania Riaz
- Allama Iqbal Medical College, Lahore, Pakistan
| | | | | | | | | | - Fariha Ejaz
- Karachi Medical and Dental College, Karachi, Pakistan
| | | | - Arais Khan
- Islamabad Medical and Dental College, Islamabad, Pakistan
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Saeed K, Riaz S, Adil A, Nawaz I, Naqvi SKUH, Baig A, Ali M, Zeb I, Ahmed R, Naqvi TA. Characterization of alkaline metalloprotease isolated from halophilic bacterium Bacillus cereus and its applications in various industrial processes. AN ACAD BRAS CIENC 2023; 95:e20230014. [PMID: 37878911 DOI: 10.1590/0001-3765202320230014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/08/2023] [Indexed: 10/27/2023] Open
Abstract
Microbial proteases are one of the most demanding enzymes for various industries with diverse applications in food, pharmaceutics, and textile industries to name the few. An extracellular alkaline metalloprotease was produced and purified from moderate halophilic bacterial strain, Bacillus cereus TS2, with some unique characteristics required for various industrial applications. The protease was produced in basal medium supplemented with casein and was partially purified by ion exchange chromatography followed by ammonium sulphate precipitation. The alkaline metalloprotease has molecular weight of 35 kDa with specific activity of 535.4 µM/min/mg. It can work at wide range of pH from 3 to 12, while showing optimum activity at pH 10. Similarly, the alkaline metalloprotease is stable till the temperature of 80 °C and works at wide range of temperature from 20 to 90 °C with optimum activity at 60 °C. The turnover rate increases in the presence of NaCl and Co+2 with k cat/KM of 1.42 × 103 and 1.27 × 103 s-1.M-1 respectively, while without NaCl and Co+2 it has a value of 7.58× 102. The alkaline metalloprotease was relatively resistant to thermal and solvent mediated denaturation. Applications revealed that the metalloprotease was efficient to remove hair from goat skin, remove blood stains and degrade milk, thus can be a potential candidate for leather, detergent, and food industry.
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Affiliation(s)
- Kainat Saeed
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Sania Riaz
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Abdullah Adil
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Ismat Nawaz
- COMSATS University Islamabad, Department of Biosciences, Park Road, Tarlai Kalan, Islamabad 45550, Pakistan
| | - Syed Kamran-U-Hassan Naqvi
- COMSATS University Islamabad, Department of Biosciences, Park Road, Tarlai Kalan, Islamabad 45550, Pakistan
| | - Ayesha Baig
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Muhammad Ali
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Iftikhar Zeb
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Raza Ahmed
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
| | - Tatheer Alam Naqvi
- COMSATS University Islamabad, Department of Biotechnology, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
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Zafar I, Safder A, Imran Afridi H, Riaz S, -ur-Rehman R, Unar A, Un Nisa F, Gaafar ARZ, Bourhia M, Wondmie GF, Sharma R, Kumar D. In silico and in vitro study of bioactive compounds of Nigella sativa for targeting neuropilins in breast cancer. Front Chem 2023; 11:1273149. [PMID: 37885828 PMCID: PMC10598785 DOI: 10.3389/fchem.2023.1273149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023] Open
Abstract
Introduction: Breast cancer poses a significant global challenge, prompting researchers to explore novel approaches for potential treatments. Material and Methods: For in vitro study we used thin layer chromatography (TAC) for phytochemical screening, total antioxidant capacity (TLC) assay for antioxidant capacity, and hemolytic activity test for toxicity of Neuropilins (NRPs). We performed bioinformatic analyses to predict protein structures, molecular docking, pharmacophore modeling, and virtual screening to reveal interactions with oncogenes. We conducted 200 ns Molecular Dynamics (MD) simulations and MMGBSA calculations to assess the complex dynamics and stability. Results: We identified phytochemical constituents in Nigella sativa leaves, including tannins, saponins, steroids, and cardiac glycosides, while phlobatannins and terpenoids were absent. The leaves contained 9.4% ± 0.04% alkaloids and 1.9% ± 0.05% saponins. Methanol extract exhibited the highest yield and antioxidant capacity, with Total Flavonoid Content at 127.51 ± 0.76 mg/100 g and Total Phenolic Content at 134.39 ± 0.589 mg GAE/100 g. Hemolysis testing showed varying degrees of hemolysis for different extracts. In-silico analysis indicated stable Neuropilin complexes with key signaling pathways relevant for anti-cancer therapy. Molecular docking scores at different possesses (0, C-50, C -80, C-120,C -150, C -200 ns) revealed strong hydrogen bonding in the complexes and showed -12.9, -11.6, and -11.2 binding Affinities (kcal/mol) to support their stability. Our MD simulations analysis at 200ns confirmed the stability of Neuropilin complexes with the signaling pathways protein PI3K. The calculated binding free energies using MMGBSA provided valuable quantitative information on ligand potency on different time steps. These findings highlight the potential health benefits of N. sativa leaves and their possible role in anti-cancer treatments targeting angiogenesis. Conclusion: Nigella sativa leaves have shown significant medical potential due to their bioactive compounds, which exhibit strong properties in supporting organogenic processes related to cancer. Furthermore, studies have highlighted the promising role of neuropilins in anticancer treatment, demonstrating stable interactions and potential as targeted therapy specifically for breast cancer.
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Affiliation(s)
- Imran Zafar
- Department of Bioinformatics and Computational Biology, Virtual University Pakistan, Lahore, Pakistan
| | - Arfa Safder
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Punjab, Pakistan
| | - Hassan Imran Afridi
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
| | - Sania Riaz
- Faculty of Health and Life Sciences, Department of Bioinformatics and Biosciences, Capital University of Science and Technology, Islamabad, Pakistan
| | - Rizwan -ur-Rehman
- Faculty of Health and Life Sciences, Department of Bioinformatics and Biosciences, Capital University of Science and Technology, Islamabad, Pakistan
| | - Ahsanullah Unar
- Department of Precision Medicine, University of Campania “L. Vanvitelli”, Naples, Italy
| | - Fakhar Un Nisa
- Depatment of Molecular Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Abdel-Rhman Z. Gaafar
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Bourhia
- Department of Chemistry and Biochemistry, Faculty of Medicine and Pharmacy, Ibn Zohr University, Laayoune, Morocco
| | | | - Rohit Sharma
- Department of Rasa Shastra and Bhaishajya Kalpana, Faculty of Ayurveda, Institute of Medical Science, Banaras Hindu University, Varanasi, India
| | - Dileep Kumar
- UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, CA, United States
- Poona College of Pharmacy, Bharati Vidyapeeth (Deemed to be) University, Pune, India
- Centre for Advanced Research in Pharmaceutical Sciences, Poona College of Pharmacy, Pune, India
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Ghazal M, Ahmed S, Farooqui WA, Khalid F, Riaz S, Akber A, Shabbir S, Khan FR, Sadiq A. A placebo-controlled randomized clinical trial of antibiotics versus probiotics as an adjuvant to nonsurgical periodontal treatment among smokers with Stage III, Grade C generalized periodontitis. Clin Adv Periodontics 2023; 13:197-204. [PMID: 37327229 DOI: 10.1002/cap.10253] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 05/10/2023] [Accepted: 06/12/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Probiotics are viable microorganisms, which if delivered in appropriate dose can provide health benefits. Lactobacillus reuteri (DM17938+ATCC PTA 5289) has been recommended as a safe choice for probiotics. The objective of this study is to compare the improvement in the periodontal parameters amongst smokers with generalized periodontitis with Stage III, Grade C treated with nonsurgical periodontal treatment (NSPT) to which either an antibiotics or probiotics were given as an adjuvant. METHODS Sixty smokers with Stage III, Grade C generalized periodontitis were randomized in two groups after taking informed consent. Periodontal parameters including bleeding on probing (BOP), probing depth (PD), attachment loss (AL), gingival index (GI), and plaque index (PI) were recorded. Group 1 received (after NSPT and oral hygiene instructions) amoxicillin and metronidazole for 7 days and a placebo for probiotics for 30 days. Group 2 was provided (after NSPT and oral hygiene instructions) with one tablet of Lactobacillus reuteri probiotics (2 × 108 CFU) twice daily for 30 days and placebo antibiotics for 7 days. The periodontal parameters were recorded again at 1- and 3-month follow-ups as outcome variables. Mean, standard deviation, and confidence interval were reported using SPSS 20.0. RESULTS A statistically significant clinical improvement in the PD, BOP, PI, and GI were observed in both the groups at 3-month follow-up. However, the AL remained unchanged in both the groups. CONCLUSIONS Administration of probiotics and antibiotics along with NSPT yield statistically significant differences in PD and BOP from baseline to 3-month follow-up. However, between the group differences were not statistically significant for the periodontal parameters (AL, PD, and BOP).
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Affiliation(s)
- Mehwish Ghazal
- Department of Periodontology, Dow University of Health Sciences, Karachi, Pakistan
| | - Shahbaz Ahmed
- Department of Operative Dentistry, Dr. Ishratul Ebad Khan Institute of Oral Health Sciences, Karachi, Pakistan
| | | | - Fizza Khalid
- Department of Periodontology, Baqai Dental College, Karachi, Pakistan
| | - Sania Riaz
- Department of Periodontology, Baqai Dental College, Karachi, Pakistan
| | - Ather Akber
- Department of Periodontology, Dow University of Health Sciences, Karachi, Pakistan
| | - Sumaiya Shabbir
- Department of Periodontology, Dow University of Health Sciences, Karachi, Pakistan
| | - Farhan Raza Khan
- Department of Surgery, Section Dentistry, Aga Khan University & Hospital, Karachi, Pakistan
| | - Ali Sadiq
- Department of Surgery, Section Dentistry, Aga Khan University & Hospital, Karachi, Pakistan
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Kakar MU, Karim H, Shabir G, Iqbal I, Akram M, Ahmad S, Shafi M, Gul P, Riaz S, Rehman R, Salari H. A review on extraction, composition, structure, and biological activities of polysaccharides from different parts of Nelumbo nucifera. Food Sci Nutr 2023; 11:3655-3674. [PMID: 37457175 PMCID: PMC10345683 DOI: 10.1002/fsn3.3376] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/30/2023] [Accepted: 04/04/2023] [Indexed: 07/18/2023] Open
Abstract
Nelumbo nucifera (lotus plant) is an important member of the Nelumbonaceae family. This review summarizes the studies conducted on it since the past 15 years to provide an understanding on future areas of focus. Different parts of this plant, that is, leaves, roots, and seeds, have been used as food and for the treatment of various diseases. Polysaccharides have been extracted from different parts using different methods. The manuscript reviews the methods of extraction of polysaccharides used for leaves, roots, and seeds, along with their yield. Some methods can provide better yield while some provide better biological activity with low yield. The composition and structure of extracted polysaccharides have been determined in some studies. Although monosaccharide composition has been determined in various studies, too little information about the structure of polysaccharides from N. nucifera is available in the current literature. Different useful biological activities have been explored using in vivo and in vitro methods, which include antioxidant, antidiabetic, antitumor, anti-osteoporotic, immunomodulatory, and prebiotic activities. Antitumor activity from polysaccharides of lotus leaves is yet to be explored, besides lotus root has been underexplored as compared to other parts (leaves and seeds) according to our literature survey. Studies dedicated to the successful use of combination of extraction methods can be conducted in future. The plant provides a therapeutic as well as nutraceutical potential; however, antimicrobial activity and synergistic relationships of polysaccharides from different parts of the plant need further exploration.
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Affiliation(s)
- Mohib Ullah Kakar
- Faculty of Marine SciencesLasbela University of Agriculture, Water and Marine Sciences (LUAWMS)UthalBalochistanPakistan
| | - Hammad Karim
- Sheikh Zayed Medical CollegeRahim Yar KhanPunjabPakistan
| | | | - Imran Iqbal
- Department of Information and Computational SciencesSchool of Mathematical Sciences and LMAMPeking UniversityBeijingChina
| | - Muhammad Akram
- Department of Life Sciences, School of ScienceUniversity of Management and Technology (UMT)LahorePakistan
| | - Sajjad Ahmad
- Faculty of Veterinary and Animal SciencesLasbela University of Agriculture, Water and Marine Sciences (LUAWMS)UthalBalochistanPakistan
| | - Muhammad Shafi
- Faculty of Marine SciencesLasbela University of Agriculture, Water and Marine Sciences (LUAWMS)UthalBalochistanPakistan
| | - Pari Gul
- Institute of BiochemistryUniversity of BalochistanQuettaPakistan
| | - Sania Riaz
- Department of Bioinformatics and BiosciencesCapital University of Science and TechnologyIslamabadPakistan
| | - Rizwan‐ur‐ Rehman
- Department of Bioinformatics and BiosciencesCapital University of Science and TechnologyIslamabadPakistan
| | - Hamid Salari
- Department of Horticulture, Faculty of AgricultureKabul UniversityKabulAfghanistan
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Riaz S, Konstantinidis I, Baker W, Jaiswal A. Impact of the Donor Organ Allocation Change on Heart Transplant of Latinos. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Riaz S, Hakim M, Mehta T, Jaiswal A, Scatola A. Successful Bridge From Va-Ecmo to Heart Transplant in an Adult after Mechanical Thrombectomy for Acute Ischemic Stroke. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Riaz S, Konstantinidis I, Baker W, Jaiswal A. Impact of the Donor Organ Allocation Change on Heart Transplant of Patients with Small Body Surface Area. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Konstantinidis I, Riaz S, Baker W, Jaiswal A. Symptomatic Peripheral Vascular Disease Increases Long Term Mortality after Heart Transplantation. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Konstantinidis I, Riaz S, Baker W, Jaiswal A. Impact of the Donor Organ Allocation Change on Heart Transplant of Patients ≥65 Years of Age. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Riaz S, Nasreen S, Burhan Z, Shafique S, Alvi SA, Khan MA. Microplastics assessment in Arabian Sea fishes: accumulation, characterization, and method development. BRAZ J BIOL 2023; 84:e270694. [PMID: 36790302 DOI: 10.1590/1519-6984.270694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 01/10/2023] [Indexed: 02/16/2023] Open
Abstract
Around the globe, plastic has been entering the aquatic system and is ingested by organisms. Identification, optimal digestion method, and characterization of the polymers to trace sources are of growing importance. Hence, the present work investigated microplastics accumulation, digestion protocol efficiency, and characterization of polymers with FTIR analysis in the guts of five fishes (Lethrinus nebulosus, Rastrelliger kanagurta, Acanthopagrus arabicus, Otolithes ruber, and Euryglossa orientalis) from the Karachi coastal area, Arabian Sea. A total of 1154 microplastics (MPs) were ingested by 29 out of 33 fish species (87%). The highest average MP/fish was recorded in Otolithes ruber (54) and the lowest in Rastrelliger kanagurta (19.42). Microfibers were the most abundant shape with the highest numbers (35.52%) as compared to the rest of the MPs identified. Transparent microfibers were recorded as the highest in numbers followed by red, black, blue, and green. In this study, KOH with different concentrations and exposure times along with oxidizing agent hydrogen peroxide was tested (Protocols 3 and 4). Results showed these bases were highly efficient in obtaining optimal digestion of the samples. FTIR analysis confirmed that the majority of the polymers found in the fish guts were polyethylene and polypropylene. This study validated for the first time the presence of these polymers of plastic in marine fish from Pakistan.
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Affiliation(s)
- S Riaz
- University of Karachi, Center of Excellence in Marine Biology, Karachi, Pakistan
| | - S Nasreen
- University of Karachi, Center of Excellence in Marine Biology, Karachi, Pakistan
| | - Z Burhan
- University of Karachi, Center of Excellence in Marine Biology, Karachi, Pakistan
| | - S Shafique
- University of Karachi, Center of Excellence in Marine Biology, Karachi, Pakistan
| | - S A Alvi
- PCSIR Laboratories Complex, Applied Chemistry Research Centre, Karachi, Pakistan
| | - M A Khan
- University of Karachi, Department of Zoology, Karachi, Pakistan
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Bilal A, Muhammad K, Riaz S, Altaf S. Demographic correlates of paternal postpartum depression in Pakistani males. J Sex Med 2022. [DOI: 10.1016/j.jsxm.2022.03.457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gulzar R, e Haque Mahmud T, Rasheed A, Riaz S, Akhtar Adnan W, Hafeez U, Mahmood Malik A. Musculoskeletal Symptoms in Patients Recovering from COVID-19. Muscles Ligaments Tendons J 2022. [DOI: 10.32098/mltj.01.2022.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Karim A, Shoaib M, Khwaja S, Nisar S, Riaz S, Siddiqui S, Ansari SB, Riaz S. An estimation of optimum dietary concentration of soy bean meal for carps (Catla catla, Labeo rohita and Cirhinus mrigala). BRAZ J BIOL 2021; 84:e253613. [PMID: 34730702 DOI: 10.1590/1519-6984.253613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 08/11/2021] [Indexed: 11/22/2022] Open
Abstract
Soybean meal is an inexpensive plant origin protein which has been used in practical diets as a replacement of animal protein such as fish meal or chicken meal, due to the uneconomical price of animal protein diets. Consequently, a research study was conducted on some commercial species of Indian major carps i.e. Catla (Cattla cattla), Rohu (Labeo rohita) and Mrigala (Cirhinus mrigala) (Hamilton, 1822) to estimate optimum dietary protein requirement of soy bean meal in diet in an intensive polyculture. Three different diets (SBM I, SBM II and SBM III) were formulated by 80%, 50% and 20% replacement of fish meal with soybean meal from a 45% fish meal diet (control).Highest monthly mean weight gain was obtained by SBM II (with 35% CP and about 50% substitution of fish meal), while SBM III (45% Crude Protein and about 20% substitution of fish meal) was stood second. All tested diets respond enormously by producing high yield as compare to control diet, though SBM II generated highest yield among all. On the bases of the following research, it was revealed that the SBM can surrogate even50% fish meal without any augmentation of other amino acids in the diet of Indian major carps.
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Affiliation(s)
- A Karim
- Sardar Bahadur Khan Women's University, Department of Zoology, Quetta, Balochistan, Pakistan
| | - M Shoaib
- University of Karachi, Department of Zoology, Karachi, Pakistan
| | - S Khwaja
- Federal Urdu University of Arts, Science, and Technology, Department of Zoology, Gulshan-e-Iqbal, Karachi, Pakistan
| | - S Nisar
- Federal Urdu University of Arts, Science, and Technology, Department of Zoology, Gulshan-e-Iqbal, Karachi, Pakistan
| | - S Riaz
- University of Karachi, Department of Zoology, Karachi, Pakistan
| | - S Siddiqui
- Federal Urdu University of Arts, Science, and Technology, Department of Zoology, Gulshan-e-Iqbal, Karachi, Pakistan
| | - S B Ansari
- University of Karachi, Department of Zoology, Karachi, Pakistan
| | - S Riaz
- University of Karachi, Department of Botany, Karachi, Pakistan
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Hanif A, Saeed M, Rasheed F, Hussain S, Riaz S, Ahmad M, Ain N. Acinetobacter Spp: Resistance and therapeutic decisions at the turn of the novel millennium. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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18
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Walmsley J, Marcu V, Riaz S, Ahmed J. A stepwise approach to laparoscopic anterior resection: an illustrated video for training colorectal surgeons - a video vignette. Colorectal Dis 2020; 22:2344. [PMID: 32741070 DOI: 10.1111/codi.15288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/12/2020] [Indexed: 02/08/2023]
Affiliation(s)
- J Walmsley
- Department of Integrated Surgery, Northampton General Hospital NHS Trust, Northampton, UK
| | - V Marcu
- Department of Integrated Surgery, Northampton General Hospital NHS Trust, Northampton, UK
| | - S Riaz
- Department of Integrated Surgery, Northampton General Hospital NHS Trust, Northampton, UK
| | - J Ahmed
- Department of Integrated Surgery, Northampton General Hospital NHS Trust, Northampton, UK
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Fareed A, Riaz S, Nawaz I, Iqbal M, Ahmed R, Hussain J, Hussain A, Rashid A, Naqvi TA. Immobilized cells of a novel bacterium increased the degradation of N-methylated carbamates under low temperature conditions. Heliyon 2019; 5:e02740. [PMID: 31768430 PMCID: PMC6872827 DOI: 10.1016/j.heliyon.2019.e02740] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/05/2019] [Accepted: 10/23/2019] [Indexed: 11/16/2022] Open
Abstract
Carbamates are synthetic pesticides, extensively used throughout the world due to their broad specificity against various insect pests. However, their enormous and inadequate use have made them a potential threat to the environment. At low temperature, degradation of carbamates becomes difficult mainly because of low biological activity. In the present study, we isolated a bacterial strain from a low temperature climate where the N-methylated carbamates are used for crop protection. The bacterium, was identified as Pseudomonas plecoglossicida strain (TA3) by 16S rRNA analysis. Degradation experiments with both free and immobilized cells in minimal salt medium indicated that the strain TA3 utilized carbaryl, carbofuran and aldicarb as both carbon and nitrogen source. TA3 can grow well at 4 °C and demonstrated the ability to degrade three carbamates (50 μgml-1) at low temperature. The immobilized cells were found more efficient than their free cells counter parts. Immobilized cells has ability to degrade 100% of carbamates at 30 °C while 80% at 4 °C but incase of their free cells counter parts the efficiency to degrade carbamates was less which was 60% at 4 °C and 80% at 30 °C. TA3 free cellsextract also depicted high activity against all the three carbamates even at 4 °C indicating a possible enzymatic mechanism of degradation.
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Affiliation(s)
- Anum Fareed
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Sania Riaz
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Ismat Nawaz
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Mazhar Iqbal
- Department of Environmental Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Raza Ahmed
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Jamshaid Hussain
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Azhar Hussain
- Department of Agriculture and Food Technology, Karakoram International University, Gilgit-Baltistan, Pakistan
| | - Azhar Rashid
- Pakistan Atomic Energy Commission, Nuclear Institute for Food and Agriculture, Peshawar, Pakistan
| | - Tatheer Alam Naqvi
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad Campus, Pakistan
- Corresponding author.
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Bashir M, Riaz S, Kayani Z, Naseem S. Synthesis of bone implant substitutes using organic additive based zirconia nanoparticles and their biodegradation study. J Mech Behav Biomed Mater 2018; 88:48-57. [DOI: 10.1016/j.jmbbm.2018.07.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/22/2018] [Accepted: 07/24/2018] [Indexed: 10/28/2022]
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Abid S, Hussain T, Nazir A, Khenoussi N, Zahir A, Riaz S. Development of nanofibers based neuropathic patch loaded with Lidocaine to deal with nerve pain in burn patients. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1757-899x/414/1/012019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Riaz S, Huerta-Acosta K, Tenscher AC, Walker MA. Genetic characterization of Vitis germplasm collected from the southwestern US and Mexico to expedite Pierce's disease-resistance breeding. Theor Appl Genet 2018; 131:1589-1602. [PMID: 29713731 DOI: 10.1007/s00122-018-3100-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Pierce's disease (PD) limits the cultivation of Vitis vinifera grape cultivars in California, across the southern United States and into South America. Resistance has been well characterized in V. arizonica, and one resistance locus has been identified (PdR1). However, resistance is poorly characterized in most other grape species. We tested a wide range of Vitis species from the southwestern United States for resistance to PD and used nuclear and chloroplast markers to phenotypically and genetically select a diverse set of resistant accessions. Chloroplast SSR markers identified 11 maternal lineage lines within the set of 17 (14 new and three previously identified) PD resistant accessions. A total of 19 breeding populations (F1 and pseudo-BC1) were developed with the 14 PD resistant accessions, and a total of 705 seedlings were analyzed for PD resistance. Using a limited mapping approach, 12 SSR markers, linked to the PdR1 locus, were used to genotype the breeding populations and phenotypic data were analyzed. Nine accessions had a major resistance quantitative trait locus (QTL) within the genomic region containing PdR1. The phenotypic data for these three resistant accessions, ANU67, b41-13, and T03-16, did not associate with PdR1 linked markers, indicating that their resistance is located in other regions of the genome. These three accessions were identified as candidates for use in the development of framework maps with larger populations capable of detecting additional and unique loci for PD resistance breeding and the stacking of PD resistance genes.
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Affiliation(s)
- S Riaz
- Department of Viticulture and Enology, University of California, Davis, CA, 95616, USA
| | - K Huerta-Acosta
- Department of Viticulture and Enology, University of California, Davis, CA, 95616, USA
| | - A C Tenscher
- Department of Viticulture and Enology, University of California, Davis, CA, 95616, USA
| | - M A Walker
- Department of Viticulture and Enology, University of California, Davis, CA, 95616, USA.
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Mraiche F, Riaz S. P302Cathepsin B induced cardiomyocyte hypertrophy requires activation of the Na+/H+ exchanger isoform-1. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F Mraiche
- Qatar University, College of Pharmacy, Department of Pharmaceutical Sciences, Doha, Qatar
| | - S Riaz
- Qatar University, College of Pharmacy, Department of Pharmaceutical Sciences, Doha, Qatar
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Wang H, Sun Z, Rehman RU, Shen T, Riaz S, Li X, Hua E, Zhao J. Apple phlorizin supplementation attenuates oxidative stress in hamsters fed a high-fat diet. J Food Biochem 2017. [DOI: 10.1111/jfbc.12445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Hao Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science & Technology; Tianjin China
| | - Zhenou Sun
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science & Technology; Tianjin China
| | - Rizwan-Ur Rehman
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science & Technology; Tianjin China
| | - Tingting Shen
- College of Biological Engineering; Tianjin University of Science & Technology; Tianjin China
| | - Sania Riaz
- Center of Excellence in Molecular Biology; University of Punjab; Lahore Pakistan
| | - Xiang Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science & Technology; Tianjin China
| | - ErBing Hua
- College of Biological Engineering; Tianjin University of Science & Technology; Tianjin China
| | - Jiang Zhao
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science & Technology; Tianjin China
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Masood R, Hussain T, Umar M, Azeemullah, Areeb T, Riaz S. In situ development and application of natural coatings on non-absorbable sutures to reduce incision site infections. J Wound Care 2017; 26:115-120. [PMID: 28277992 DOI: 10.12968/jowc.2017.26.3.115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The purpose of the study was the development of a suture line that has antibacterial properties and reduces the chance of wound infection thus facilitating the healing process. METHOD Hydrolysed chitosan, turmeric powder and clove oil were used in different proportions to formulate antimicrobial coating for the polyethylene terephthalate (PET) and polyamide (Nylon 6) threads. The threads were coated using a lab-scale yarn sizing machine. Tensile, and knot strength of the coated sutures were measured. As was the antimicrobial action of Staphylococcus aureus strain ATCC29213. RESULTS The results show that coatings have slightly improved the tensile and knot strength properties of these sutures. The coated sutures also have satisfactory microbial inhibition against Staphylococcus aureus. CONCLUSION The coating slightly improved the tensile strength of the sutures. However, the knot is the weakest part of the suture strand. All the formulations of the coating have shown satisfactory antimicrobial activity against Gram-positive Staphylococcus aureus bacteria. We conclude that application of natural coatings on non-absorbable sutures can be useful to reduce the incisions and wound site infections.
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Affiliation(s)
- R Masood
- Director, Research and Development Division, National Textile University, Faisalabad, Punjab, Pakistan
| | - T Hussain
- Dean, Faculty of Engineering and Technology, National Textile University, Faisalabad, Punjab, Pakistan
| | - M Umar
- Research Assistant, Research and Development Division, National Textile University, Faisalabad, Punjab, Pakistan
| | - Azeemullah
- Research Assistant, Research and Development Division, National Textile University, Faisalabad, Punjab, Pakistan
| | - T Areeb
- Research Assistant, Research and Development Division, National Textile University, Faisalabad, Punjab, Pakistan
| | - S Riaz
- Research Assistant, Research and Development Division, National Textile University, Faisalabad, Punjab, Pakistan
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Kaur A, Verma R, Gandhi A, Riaz S, Vega-Sanchez M, Jaffe F, Yu D, Chatila W, D’alonzo G, Weaver S, Shariff T, Krachman S. 0631 EFFECT OF DISEASE SEVERITY ON DETERMINING BODY POSITION DURING SLEEP IN PATIENTS WITH POSITIONAL OBSTRUCTIVE SLEEP APNEA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Gandhi A, Riaz S, Kaur A, Verma R, Vega-Sanchez M, Jaffe F, Yu D, Chatila W, D’alonzo G, Weaver S, Shariff T, Krachman S. 0570 INFLUENCE OF GENDER ON THE EFFECTIVENESS OF POSITIONAL THERAPY IN THE TREATMENT OF PATIENTS WITH POSITIONAL OBSTRUCTIVE SLEEP APNEA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Khan U, Li WJ, Adeela N, Irfan M, Javed K, Wan CH, Riaz S, Han XF. Magnetic response of hybrid ferromagnetic and antiferromagnetic core-shell nanostructures. Nanoscale 2016; 8:6064-6070. [PMID: 26931335 DOI: 10.1039/c5nr07946b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The synthesis of FeTiO3-Ni(Ni80Fe20) core-shell nanostructures by a two-step method (sol-gel and DC electrodeposition) has been demonstrated. XRD analysis confirms the rhombohedral crystal structure of FeTiO3(FTO) with space group R3[combining macron]. Transmission electron microscopy clearly depicts better morphology of nanostructures with shell thicknesses of ∼25 nm. Room temperature magnetic measurements showed significant enhancement of magnetic anisotropy for the permalloy (Ni80Fe20)-FTO over Ni-FTO core-shell nanostructures. Low temperature magnetic measurements of permalloy-FeTiO3 core-shell structure indicated a strong exchange bias mechanism with magnetic coercivity below the antiferromagnetic Neel temperature (TN = 59 K). The exchange bias is attributed to the alignment of magnetic moments in the antiferromagnetic material at low temperature. Our scheme opens a path towards optimum automotive systems and wireless communications wherein broader bandwidths and smaller sizes are required.
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Affiliation(s)
- U Khan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
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Ali SS, Li WJ, Javed K, Shi DW, Riaz S, Zhai GJ, Han XF. Exchange bias in two-step artificially grown one-dimensional hybrid Co-BiFeO3 core-shell nanostructures. Nanotechnology 2016; 27:045708. [PMID: 26656305 DOI: 10.1088/0957-4484/27/4/045708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
One-dimensional core-shell nanostructures consisting of a ferromagnetic cobalt core and a multiferroic BiFeO3 (BFO) shell were fabricated by an artificial two-step methodology. The coupling between the ferromagnetic core and multiferroic shell manifests a significant exchange bias effect which gives a clear demonstration of the anti-ferromagnetic functionality of the BFO shell material. Exchange biases of 30 Oe and 60 Oe are observed at 300 K and at 5 K, respectively. Superparamagnetic contributions at lower temperatures play an important role in contributing to overall magnetic behavior. Dominant shape anisotropy causes parallel alignment of the easy magnetization axis along the axis of core-shell nanowires. A coherent mode of the magnetization reversal mechanism is observed by the angular dependence of coercivity (H c). This versatile two-step methodology can be employed to fabricate and investigate many other hybrid nanostructures leading to a vast scope of investigation for researchers.
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Affiliation(s)
- S S Ali
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Javed K, Li WJ, Ali SS, Shi DW, Khan U, Riaz S, Han XF. Enhanced exchange bias and improved ferromagnetic properties in Permalloy-BiFe0.95Co0.05O3 core-shell nanostructures. Sci Rep 2015; 5:18203. [PMID: 26658956 PMCID: PMC4677379 DOI: 10.1038/srep18203] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/24/2015] [Indexed: 11/09/2022] Open
Abstract
Hybrid core-shell nanostructures consisting of permalloy (Ni80Fe20) and multiferroic(BiFeO3, BFO/BiFe0.95Co0.05O3, BFC) materials were synthesized by a two-step method, based on wet chemical impregnation and subsequent electrodeposition within porous alumina membranes. Structural and magnetic characterizations have been done to investigate doping effect on magnetic properties and exchange bias. The magnetometry analysis revealed significant enhancements of the exchange bias and coercivity in NiFe-BFC core-shell nanostructures as compared with NiFe-BFO core-shell nanostructures. The enhancements can be attributed to the effective reduction of ferromagnet domain sizes between adjacent layers of core-shell structure. It indicates that it is possible to improve properties of multiferroic composites by site-engineering method. Our approach opens a pathway to obtain optimized nanostructured multiferroic composites exhibiting tunable magnetic properties.
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Affiliation(s)
- K Javed
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,Department of Electrical Engineering, CIIT WAH, Pakistan
| | - W J Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - S S Ali
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - D W Shi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - U Khan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - S Riaz
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,Centre of Excellence in Solid State Physics, University of the Punjab, Lahore-54590, Pakistan
| | - X F Han
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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Riaz S, Bashir MF. Phenotypic and Molecular Characterization of Plasmid- Encoded Extended Spectrum Beta-Lactamases Produced by Escherichia coli and Klebsiella spp from Lahore, Pakistan. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i9.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Purpose: To investigate the distribution of plasmid-encoded extended spectrum beta-lacatamases (ESBLs) in Lahore, Pakistan using different phenotypic and molecular methods.Methods: Escherichia coli and Klebsiella spp were obtained over a period of nineteen months (June 2007 to December 2008). Both were tested by the double disk synergy test, combined disk test and Epsiometer-test (E-test) to evaluate their ability to detect ESBLs. The genotypes of ESBLs were analyzed by monoplex polymerase chain reaction (PCR), multiplex PCR, DNA sequencing and isoelectric focusing.Results: 662 E. coli and 153 Klebsiella spp were analyzed. Among these isolates, 39.3 % E. coli and 26.1 % Klebsiella spp were positive for extended spectrum beta-lactamases (ESBLs).71.9 % E. coli and 79.6 % Klebsiella spp showed minimum inhibitory concentration (MIC) in the range > 32/0.064 = 500 μl/mL for cetatzidime/cetatzidime + clavulanic acid, while 66.5 % E. coli and 69.1 % Klebsiella spp revealed MIC in the range of > 16/0.016 = 1000 μl/mL for cefotaxime/cefotaxime + clavulanic acid. Antibiotic susceptibility testing revealed that imipemem, meropenem and tazocine were the most effective in the management of such infections. The most frequent genotype of ESBL was OXA (19.2 %) for E. coli and SHV (92.5 %) for Klebsiella spp. The highest genotypic combination found was the combination of TEM/OXA (44.2 %) for E. coli.Conclusion: The resistance of E. coli and Klebsiella spp-producing ESBLs in Pakistan is a serious issue, and TEM, OXA and SHV type ESBL were the most common genotypes. Some isolates produced two or three genotypes at a time. Multiplex PCR of ESBL may help in early detection as well as phenotypic antibiotic therapy of these infections.Keywords: Beta-lactamases, Escherichia coli, Klebsiella spp, Antibiotic susceptibility, Plasmidencoded, Structural genes, Imipemem, Meropenem, Tazocine
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Sharief S, Riaz S. The evaluation of prognostic value of serum tumor marker in ovarian tumors. BMC Proc 2015. [PMCID: PMC4306078 DOI: 10.1186/1753-6561-9-s1-a56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hashmi AH, Ahmad N, Riaz S, Ali L, Siddiqi S, Khan KM, Shakoori AR, Mansoor A. Genotype CC of rs12979860 is providing protection against infection rather than assisting in treatment response for HCV genotype 3a infection. Genes Immun 2014; 15:430-2. [PMID: 24898388 DOI: 10.1038/gene.2014.31] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 04/17/2014] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
Recent discovery of single-nucleotide polymorphisms located in the upstream region of interleukin-28B (IL28B) has shown association with interferon (IFN) treatment response especially in hepatitis C virus (HCV) genotype 1-infected patients. Pakistan, being the country with second highest prevalence of HCV with predominantly 3a genotype infection, bears a significant disease burden. The present study was conducted to evaluate the effect of rs12979860 genotypes on treatment response in HCV-3a-infected patients. This study shows that the CC genotype is providing protection against infection to HCV. But once infected, the CC genotype patients show viral persistence following IFN therapy. The TT genotype is assisting the 3a patients in viral clearance after IFN treatment. To our knowledge, this is the first study showing rs12979860 genotype association with IFN response in Pakistani HCV-3a-infected patients.
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Affiliation(s)
- A H Hashmi
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - N Ahmad
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - S Riaz
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - L Ali
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - S Siddiqi
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
| | - K M Khan
- Pakistan Academy of Sciences, Islamabad, Pakistan
| | - A R Shakoori
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - A Mansoor
- Institute of Biomedical and Genetic Engineering, Islamabad, Pakistan
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Sykes C, Riaz S. The Effectiveness of Interactive Coronary Heart Disease Patient Education: a multi-perspective participatory approach. Health Technol 2014. [DOI: 10.1007/s12553-013-0071-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Riaz S, Ahmed M, Rasheed A, Khan S, Badar F, Abbas N. Refractory or Relapsed Hodgkin's Lymphoma Treated with High Dose Chemotherapy Followed by Autologous Stem Cell Transplantation: Experience at SKMCH Lahore. Klin Padiatr 2014. [DOI: 10.1055/s-0034-1371151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bashir MF, Haider MS, Rashid N, Riaz S. Association of Biochemical Markers, Hepatitis C Virus and Diabetes Mellitus in Pakistani Males. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v12i5.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Bashir MF, Haider MS, Rashid N, Riaz S. Core Gene Expression and Association of Genotypes with Viral Load in Hepatitis C Virus (HCV) - Infected Patients in Punjab, Pakistan. TROP J PHARM RES 2013. [DOI: 10.4314/tjpr.v12i3.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
Grapes (Vitis vinifera) are of great economic importance worldwide. We genetically dissected a table grape breeding population, using hidden Markov models (HMM) applied to quantitative trait locus (QTL) analyses. We evaluated and dissected the following traits: total number of clusters, leaf score, peduncle length, cluster length, number of berries, weight of 10 berries, average seed number, nature of seeds, berry skin color, soluble solids, titratable acidity, and berry anthocyanin. A consensus map was developed with 255 SSR molecular markers, ordered into 19 linkage groups. The observed length of this map was 1871.4 cM, with 89.7% coverage. QTL were identified using interval mapping with HMM. The number of QTL detected for each trait varied between 1 and 8, reflecting the quantitative nature of these traits. The percentage of variation explained by these QTL was small, varying between 1.56 and 11.98%. We found QTL across linkage groups 2, 7, 12, 13, and 14 for berry anthocyanin.
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Affiliation(s)
- A P Viana
- Laboratório de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
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Abstract
This study presents a framework linkage map based on microsatellite markers for Muscadinia rotundifolia (1n = 20). The mapping population consisted of 206 progeny generated from a cross of two M. rotundifolia varieties, 'Fry' and 'Trayshed'. A total of 884 primers were tested for their ability to amplify markers: 686 amplified and 312 simple sequence repeat (SSR) primer pairs generated 322 polymorphic markers for either one or both parents. The map for the female parent 'Fry' consisted of 212 markers and covered 879 cM on 18 chromosomes. The average distance between the markers was 4.1 cM and chromosome 6 was not represented due to a lack of polymorphic markers. The map for the male parent 'Trayshed' consisted of 191 markers and covered 841 cM on 19 chromosomes. The consensus map consisted of 314 markers on 19 chromosomes with a total distance of 1,088 cM, which represented 66 % of the distance covered by the Vitis vinifera reference linkage map. Marker density varied greatly among chromosomes from 5 to 35 mapped markers. Relatively good synteny was observed across 19 chromosomes based on markers in common with the V. vinifera reference map. Extreme segregation distortion was observed for chromosome 8 and 14 on the female parent map, and 4 on the male parent map. The lack of mapping coverage for the 20th M. rotundifolia chromosome is discussed in relation to possible evolutionary events that led to the reduction in chromosome number from 21 to 19 in the ancestral genome.
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Affiliation(s)
- S Riaz
- Department of Viticulture and Enology, University of California, Davis, CA, 95616, USA
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Riaz S, Sadia B, Awan FS, Khan IA, Sadaqat HA, Khan IA. Development of a species-specific sequence-characterized amplified region marker for roses. Genet Mol Res 2012; 11:440-7. [PMID: 22427036 DOI: 10.4238/2012.february.24.3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
DNA fingerprints of four rose species, Rosa centifolia, R. Gruss-an-Teplitz, R. bourboniana, and R. damascena, were developed using RAPD-PCR. We identified a unique polymorphic band in R. centifolia. This 762-bp fragment was produced by the random primer GLI-2. The fragment was eluted and directly cloned in a TA cloning vector, pTZ57R/T. Digestion of the plasmid with EcoRI confirmed the cloning of GLI-2(762) in pTZ57R/T. A second enzyme, PstI, used in combination with EcoRI, gave complete digestion of the plasmid, and the 762-bp fragment was confirmed on the gel. Subsequently, the polymorphic amplicon was sequenced with an AB1 373 DNA sequencer system using the PRISM(TM) Ready Reaction DyeDeoxy(TM) Terminator Cycle Sequencing kit. After sequencing, specific primers (23 bp long) were designed based on the sequence of the flanking regions of the original RAPD fragment. These primers will effectively allow fingerprinting for the identification of R. centifolia species. In essence, we developed an SCAR marker to authenticate the identity of R. centifolia species and to distinguish it from its substitutes. Such techniques are required not only to complement conventional parameters in creating the passport data of commercial and medicinal products of rose, but also for routine quality control in commercial and government rosaries and rose nurseries.
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Affiliation(s)
- S Riaz
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
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Riaz S, Faisal M, Hasnain S, Khan NA. Antibacterial and Cytotoxic Activities of Acacia nilotica Lam (Mimosaceae) Methanol Extracts Against Extended Spectrum Beta-Lactamase Producing Escherichia coli and Klebsiella Species. TROP J PHARM RES 2011. [DOI: 10.4314/tjpr.v10i6.12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
This study examined the genetic diversity present in a population obtained by crossing two very distinctive varieties of wine grapes (142 progeny from a Riesling x Cabernet Sauvignon cross, including both parents, created at the University of California). The following list of morphological characters were evaluated and found to segregate in this population: cluster weight, cluster length, presence or absence of cluster wings, cluster wing length, number of berries, cluster density (CD), and berry weight. The following juice parameters were also measured: °Brix, pH, total phenolics, and titratable acidity. Genetic diversity within this population was estimated through multivariate methods that utilized the Gower index of dissimilarity and UPGMA clustering. The correlations between traits and relative contribution of each variable were also compared. Eleven groups of progeny were distinguished into categories with low, intermediate and high values for cluster weight and cluster density, and low and high values for total phenolics. An inverse correlation was detected between the variables related to production and those related to the quality of the fruit. Principal components analysis demonstrated that all variables examined in this study are important for the correct discrimination of optimal genotypes in this population. These statistical tools can be used to select individuals with the greatest potential for producing high-quality wines.
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Affiliation(s)
- A P Viana
- Laboratório de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
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Jamil A, Riaz S, Ashraf M, Foolad MR. Gene Expression Profiling of Plants under Salt Stress. Critical Reviews in Plant Sciences 2011; 30:435-458. [PMID: 0 DOI: 10.1080/07352689.2011.605739] [Citation(s) in RCA: 221] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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Riaz S, Tenscher AC, Ramming DW, Walker MA. Using a limited mapping strategy to identify major QTLs for resistance to grapevine powdery mildew (Erysiphe necator) and their use in marker-assisted breeding. Theor Appl Genet 2011; 122:1059-73. [PMID: 21188350 PMCID: PMC3056998 DOI: 10.1007/s00122-010-1511-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 12/04/2010] [Indexed: 05/18/2023]
Abstract
A limited genetic mapping strategy based on simple sequence repeat (SSR) marker data was used with five grape populations segregating for powdery mildew (Erysiphe necator) resistance in an effort to develop genetic markers from multiple sources and enable the pyramiding of resistance loci. Three populations derived their resistance from Muscadinia rotundifolia 'Magnolia'. The first population (06708) had 97 progeny and was screened with 137 SSR markers from seven chromosomes (4, 7, 9, 12, 13, 15, and 18) that have been reported to be associated with powdery or downy mildew resistance. A genetic map was constructed using the pseudo-testcross strategy and QTL analysis was carried out. Only markers from chromosome 13 and 18 were mapped in the second (04327) and third (06712) populations, which had 47 and 80 progeny, respectively. Significant QTLs for powdery mildew resistance with overlapping genomic regions were identified for different tissue types (leaf, stem, rachis, and berry) on chromosome 18, which distinguishes the resistance in 'Magnolia' from that present in other accessions of M. rotundifolia and controlled by the Run1 gene on chromosome 12. The 'Magnolia' resistance locus was termed as Run2.1. Powdery mildew resistance was also mapped in a fourth population (08391), which had 255 progeny and resistance from M. rotundifolia 'Trayshed'. A locus accounting for 50% of the phenotypic variation mapped to chromosome 18 and was named Run2.2. This locus overlapped the region found in the 'Magnolia'-based populations, but the allele sizes of the flanking markers were different. 'Trayshed' and 'Magnolia' shared at least one allele for 68% of the tested markers, but alleles of the other 32% of the markers were not shared indicating that the two M. rotundifolia selections were very different. The last population, 08306 with 42 progeny, derived its resistance from a selection Vitis romanetii C166-043. Genetic mapping discovered a major powdery mildew resistance locus termed Ren4 on chromosome 18, which explained 70% of the phenotypic variation in the same region of chromosome 18 found in the two M. rotundifolia resistant accessions. The mapping results indicate that powdery mildew resistance genes from different backgrounds reside on chromosome 18, and that genetic markers can be used as a powerful tool to pyramid these loci and other powdery mildew resistance loci into a single line.
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Affiliation(s)
- S. Riaz
- Department of Viticulture and Enology, University of California, Davis, CA 95616 USA
| | - A. C. Tenscher
- Department of Viticulture and Enology, University of California, Davis, CA 95616 USA
| | - D. W. Ramming
- USDA-Agricultural Research Service, Parlier, CA 93468 USA
| | - M. A. Walker
- Department of Viticulture and Enology, University of California, Davis, CA 95616 USA
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M. Ramay S, A. Siddiqi S, Atiq S, S. Awan M, Riaz S. Structural, Magnetic, and Electrical Properties of Al3+ Substituted CuZn-ferrites. CHINESE J CHEM PHYS 2010. [DOI: 10.1088/1674-0068/23/05/591-595] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rabbani N, Alam SS, Riaz S, Larkin JR, Akhtar MW, Shafi T, Thornalley PJ. High-dose thiamine therapy for patients with type 2 diabetes and microalbuminuria: a randomised, double-blind placebo-controlled pilot study. Diabetologia 2009; 52:208-12. [PMID: 19057893 DOI: 10.1007/s00125-008-1224-4] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Accepted: 10/22/2008] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS High-dose supplements of thiamine prevent the development of microalbuminuria in experimental diabetes. The aim of this pilot study was to assess whether oral supplements of thiamine could reverse microalbuminuria in patients with type 2 diabetes. METHODS Type 2 diabetic patients (21 male, 19 female) with microalbuminuria were recruited at the Diabetes Clinic, Sheikh Zayed Hospital, Lahore, Pakistan, and randomised to placebo and treatment arms. Randomisation was by central office in sequentially numbered opaque, sealed envelopes. Participants, caregivers and those assessing the outcomes were blinded to group assignment. Patients were given 3 x 100 mg capsules of thiamine or placebo per day for 3 months with a 2 month follow-up washout period. The primary endpoint was change in urinary albumin excretion (UAE). Other markers of renal and vascular dysfunction and plasma concentrations of thiamine were determined. RESULTS UAE was decreased in patients receiving thiamine therapy for 3 months with respect to baseline (median -17.7 mg/24 h; p < 0.001, n = 20). There was no significant decrease in UAE in patients receiving placebo after 3 months of therapy (n = 20). UAE was significantly lower in patients who had received thiamine therapy compared with those who had received placebo (30.1 vs 35.5 mg/24 h, p < 0.01) but not at baseline. UAE continued to decrease in the 2 month washout period in both groups, but not significantly. There was no effect of thiamine treatment on glycaemic control, dyslipidaemia or BP. There were no adverse effects of therapy. CONCLUSIONS/INTERPRETATION In this pilot study, high-dose thiamine therapy produced a regression of UAE in type 2 diabetic patients with microalbuminuria. Thiamine supplements at high dose may provide improved therapy for early-stage diabetic nephropathy. TRIAL REGISTRATION CTRI (India) CTRI/2008/091/000112. FUNDING Pakistan Higher Education Commission.
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Affiliation(s)
- N Rabbani
- Clinical Sciences Research Institute, Warwick Medical School, University of Warwick, University Hospital, Clifford Bridge Road, Coventry CV2 2DX, UK
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Bashir MF, Qazi JI, Ahmad N, Riaz S. Diversity of Urinary Tract Pathogens and Drug Resistant Isolates of Escherichia coli in different age and gender Groups of Pakistanis. TROP J PHARM RES 2008. [DOI: 10.4314/tjpr.v7i3.14687] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Riaz S, Tenscher AC, Rubin J, Graziani R, Pao SS, Walker MA. Fine-scale genetic mapping of two Pierce's disease resistance loci and a major segregation distortion region on chromosome 14 of grape. Theor Appl Genet 2008; 117:671-681. [PMID: 18516585 DOI: 10.1007/s00122-008-0802-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 05/09/2008] [Indexed: 05/26/2023]
Abstract
A refined genetic map of chromosome 14, which contains the Pierce's disease (PD) resistance locus, was created from three grape mapping populations. The source of PD resistance in these populations was b43-17, a male form of Vitis arizonica Engelm. that is homozygous resistant. The resistance locus segregated as a single dominant gene and mapped as PdR1a in the F1 selection F8909-17 (9621 population) and as PdR1b in a sibling F1 selection F8909-08 (04190 population). These two full sibs inherited either allele of the Pierce's disease resistance locus from the b43-17 parent, which is homozygous at that locus. The 9621 population consisted of 425 progeny and PdR1a mapped between markers VvCh14-56/VvCh14-02 and UDV095 within a 0.6 cM genetic distance. The 04190 population consisted of 361 progeny and PdR1b mapped between markers VvCh14-02 and UDV095/VvCh14-10 within a 0.4 cM distance. Many of the markers present on chromosome 14 were distorted with an excess of female alleles in the 04190 and 04373 population (developed from a cross of V. vinifera L. F2-35 x b43-17) indicating that potential gametophytic factors are present in this region. Common markers from this region within the 9621 population were not distorted except Scu15. When these markers were compared to V. vinifera-based maps of chromosome 14 they were also distorted suggesting the involvement of gametophytic factors, and prompting the identification of this region as Vitis-segregation distortion region 1 (V-SDR1). The refined genetic maps developed from this study can be used to identify and clone genes that confer resistance to Pierce's disease.
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Affiliation(s)
- S Riaz
- Department of Viticulture and Enology, University of California, Davis, CA 95616, USA
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Xu K, Riaz S, Roncoroni NC, Jin Y, Hu R, Zhou R, Walker MA. Genetic and QTL analysis of resistance to Xiphinema index in a grapevine cross. Theor Appl Genet 2008; 116:305-311. [PMID: 18004541 DOI: 10.1007/s00122-007-0670-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Accepted: 10/23/2007] [Indexed: 05/25/2023]
Abstract
Resistance to the dagger nematode Xiphinema index has been an important objective in grape rootstock breeding programs. This nematode not only causes severe feeding damage to the root system, but it also vectors grapevine fanleaf virus (GFLV), the causal agent of fanleaf degeneration and one of the most severe viral diseases of grape. The established screening procedures for dagger nematode resistance are time consuming and can produce inconsistent results. A fast and reliable greenhouse-based system for screening resistance to X. index that is suitable for genetic studies and capable of evaluating breeding populations is needed. In this report, the dynamics of nematode numbers, gall formation, and root weight loss were investigated using a variety of soil mixes and pot sizes over a 52-week period. Results indicated that the number of galls formed was correlated with the size of the nematode population and with the degree of root weight loss. After inoculation with 100 nematodes, gall formation could be reliably evaluated in 4-8 weeks in most plant growth conditions and results were obtained 6 months more rapidly than past evaluation methods. This modified X. index resistance screening method was successfully applied to 185 of the 188 F(1) progeny from a cross of D8909-15 x F8909-17 (the 9621 population), which segregates for a form of X. index resistance originally derived from Vitis arizonica. Quantitative trait loci (QTL) analysis was carried out on both parental genetic maps of 255 markers using MapQTL 4.0. Results revealed that X. index resistance is controlled by a major QTL, designated Xiphinema index Resistance 1 (XiR1), near marker VMC5a10 on chromosome 19. The XiR1 QTL was supported by a LOD score of 36.9 and explained 59.9% of the resistance variance in the mapping population.
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Affiliation(s)
- K Xu
- Department of Viticulture and Enology, University of California, Davis, CA 95616, USA
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Riaz S, Krivanek AF, Xu K, Walker MA. Refined mapping of the Pierce's disease resistance locus, PdR1, and Sex on an extended genetic map of Vitis rupestris x V. arizonica. Theor Appl Genet 2006; 113:1317-29. [PMID: 16960717 DOI: 10.1007/s00122-006-0385-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Accepted: 07/31/2006] [Indexed: 05/11/2023]
Abstract
A framework genetic map based on genomic DNA-derived SSR, EST-derived SSR, EST-STS and EST-RFLP markers was developed using 181 genotypes generated from D8909-15 (female) x F8909-17 (male), the '9621' population. Both parents are half siblings with a common female parent, Vitis rupestris 'A. de Serres', and different male parents (forms of V. arizonica). A total of 542 markers were tested, and 237 of them were polymorphic for the female and male parents. The female map was developed with 159 mapped markers covering 865.0 cM with an average marker distance of 5.4 cM in 18 linkage groups. The male map was constructed with 158 mapped molecular markers covering 1055.0 cM with an average distance of 6.7 cM in 19 linkage groups. The consensus '9621' map covered 1154.0 cM with 210 mapped molecular markers in 19 linkage groups, with average distance of 5.5 cM. Ninety-four of the 210 markers on the consensus map were new. The 'Sex' expression locus segregated as single major gene was mapped to linkage group 2 on the consensus and the male map. PdR1, a major gene for resistance to Pierce's disease, caused by the bacterium Xylella fastidiosa, was mapped to the linkage group 14 between markers VMCNg3h8 and VVIN64, located 4.3 and 2.7 cM away from PdR1, respectively. Differences in segregation distortion of markers were also compared between parents, and three clusters of skewed markers were observed on linkage groups 6, 7 and 14.
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Affiliation(s)
- S Riaz
- Department of Viticulture and Enology, University of California, Davis, CA 95616, USA
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