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Sharma V, Das R, Mehta DK, Sharma D, Aman S, Khan MU. Quinolone scaffolds as potential drug candidates against infectious microbes: a review. Mol Divers 2024:10.1007/s11030-024-10862-4. [PMID: 38683488 DOI: 10.1007/s11030-024-10862-4] [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] [Received: 02/16/2024] [Accepted: 03/26/2024] [Indexed: 05/01/2024]
Abstract
Prevalence of microbial infections and new rising pathogens are signified as causative agent for variety of serious and lethal health crisis in past years. Despite medical advances, bacterial and fungal infections continue to be a rising problem in the health care system. As more bacteria develop resistance to antibiotics used in therapy, and as more invasive microbial species develop resistance to conventional antimicrobial drugs. Relevant published publications from the last two decades, up to 2024, were systematically retrieved from the MEDLINE/PubMed, SCOPUS, EMBASE, and WOS databases using keywords such as quinolones, anti-infective, antibacterial, antimicrobial resistance and patents on quinolone derivatives. With an approach of considerable interest towards novel heterocyclic derivatives as novel anti-infective agents, researchers have explored these as essential tools in vistas of drug design and development. Among heterocycles, quinolones have been regarded extremely essential for the development of novel derivatives, even able to tackle the associated resistance issues. The quinolone scaffold with its bicyclic structure and specific functional groups such as the carbonyl and acidic groups, is indeed considered a valuable functionalities for further lead generation and optimization in drug discovery. Besides, the substitution at N-1, C-3 and C-7 positions also subjected to be having a significant role in anti-infective potential. In this article, we intend to highlight recent quinolone derivatives based on the SAR approach and anti-infective potential such as antibacterial, antifungal, antimalarial, antitubercular, antitrypanosomal and antiviral activities. Moreover, some recent patents granted on quinolone-containing derivatives as anti-infective agents have also been highlighted in tabular form. Due consideration of this, future research in this scaffold is expected to be useful for aspiring scientists to get pharmacologically significant leads.
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Affiliation(s)
- Vishal Sharma
- Department of Pharmaceutical Chemistry, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, India
| | - Rina Das
- Department of Pharmaceutical Chemistry, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, India
| | - Dinesh Kumar Mehta
- Department of Pharmaceutical Chemistry, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, India.
| | - Diksha Sharma
- Swami Devidyal College of Pharmacy, Barwala, 134118, India
| | - Shahbaz Aman
- Department of Microbiology, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, 133207, India
| | - M U Khan
- Department of pharmaceutical Chemistry & Pharmacognosy, Unaizah College of Pharmacy, Qassim University, Uniazah, Al Qassim, Saudi Arabia
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2
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Suleman M, Khan SU, Hussain T, Khan MU, Shamsul Hassan S, Majid M, Khan SU, Shehzad Khan M, Shan Ahmad RU, Arif M, Ahmad Z, Crovella S, Anthony S. Cardiovascular challenges in the era of antiretroviral therapy for AIDS/ HIV: A comprehensive review of research advancements, pathophysiological insights, and future directions. Curr Probl Cardiol 2024; 49:102353. [PMID: 38128638 DOI: 10.1016/j.cpcardiol.2023.102353] [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] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
Cardiovascular disease, particularly coronary heart disease, is becoming more common among those living with HIV. Individuals with HIV face an increased susceptibility to myocardial infarction, also known as a heart attack, as compared to the general population in developed countries. This heightened risk can be attributed mainly to the presence of effective antiretroviral drugs and the resulting longer lifespan. Some cardiac issues linked to non-antiretroviral medications, including myocarditis, endocarditis, cardiomyopathy with dilation, pulmonary hypertension, and oedema of the heart, may affect those not undergoing highly active antiretroviral therapy (ART). Impaired immune function and systemic inflammation are significant contributors to this phenomenon after initiating highly aggressive antiretroviral treatment ART. It is becoming more challenging to determine the best course of treatment for HIV-associated cardiomyopathy due to new research suggesting that protease inhibitors might have a negative impact on the development of HF. Currently, the primary focus of research on ART medications is centered on the cardiovascular adverse effects of nucleoside reverse transcriptase inhibitors and protease inhibitors. This review paper thoroughly evaluates the advancements achieved in cardiovascular disease research and explores the potential implications for prospects. Additionally, it considers the field's future prospects while examining how ART might be altered and its clinical applications.
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Affiliation(s)
- Muhammad Suleman
- Laboratory of Animal Research Center (LARC), Qatar University, Doha, Qatar; Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, PR China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, Khyber Pakhtunkhwa 22080, Pakistan
| | - Talib Hussain
- Women Dental College Abbottabad, KPK 22020, Pakistan
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027 PR China
| | - Syed Shamsul Hassan
- Chinese Academy of Sciences, Institute of Basic Medicine and Cancer (IBMC),Hangzhou 310002, PR China
| | - Muhammad Majid
- Faculty of Pharmacy, Hamdard University, Islamabad 45550, Pakistan
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, PR China
| | - Muhammad Shehzad Khan
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin city, HKSAR, Hong Kong
| | - Rafi U Shan Ahmad
- Department of Biomedical Engineering, City university of Hong Kong, Kowloon City, HKSAR, Hong Kong
| | - Muhammad Arif
- College of Agriculture, Guizhou University, Guiyang, Guizhou, China
| | - Zubair Ahmad
- Applied College, Center of Bee Research and its Products, Unit of Bee Research and Honey Production, and Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Sergio Crovella
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Stefan Anthony
- Chinese Academy of Sciences, Institute of Basic Medicine and Cancer (IBMC),Hangzhou 310002, PR China.
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Jiang X, Alnoud MAH, Ali H, Ali I, Hussain T, Khan MU, Khan SU, Khan MS, Khan SU, Ur Rehman K, Safhi AY, Alissa M. Heartfelt living: Deciphering the link between lifestyle choices and cardiovascular vitality. Curr Probl Cardiol 2024; 49:102397. [PMID: 38232921 DOI: 10.1016/j.cpcardiol.2024.102397] [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] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 01/14/2024] [Indexed: 01/19/2024]
Abstract
Cardiovascular diseases (CVDs) are still leading to a significant number of deaths worldwide despite the remarkable advancements in medical technology and pharmacology. Managing patients with established CVDs is a challenge for healthcare providers as it requires reducing the chances of recurring cardiovascular events. On the other hand, changing one's way of life can also significantly impact this area, reducing the likelihood of cardiovascular disease and death through their unique advantages. Consequently, it is advisable for healthcare providers to regularly advise their patients with coronary issues to participate in organized physical exercise and improve their overall physical activity. Additionally, patients should adhere to a diet that promotes heart health, cease smoking, avoid exposure to secondhand smoke, and address any psychosocial stressors that may heighten the risk of cardiovascular problems. These lifestyle therapies, whether used alongside drug therapy or on their own in patients who may have difficulty tolerating medications, face financial barriers, or experience ineffectiveness, can substantially reduce cardiovascular mortality and the likelihood of recurring cardiac events. Despite the considerable advancements in creating interventions, it is still necessary to determine the optimal intensity, duration, and delivery method for these interventions. Furthermore, it is crucial to carry out further investigations incorporating extended monitoring and assessment of clinical outcomes to get a more comprehensive comprehension of the efficacy of these therapies. Presenting the findings within the framework of "lifestyle medicine," this review seeks to offer a thorough synopsis of the most recent scientific investigations into the potential of behavioral modifications to lower cardiovascular disease risk.
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Affiliation(s)
- Xiaorui Jiang
- Ezhou Central Hospital, Hubei Province 436000, China
| | - Mohammed A H Alnoud
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Hamid Ali
- Department of Biosciences, COMSATS University Islamabad, Park Road Tarlai Kalan, Islamabad 44000, Pakistan
| | - Ijaz Ali
- Centre for Applied Mathematics and Bioinformatics, Gulf University for Science and Technology, Hawally 32093, Kuwait
| | - Talib Hussain
- Women Dental College Abbottabad, Khyber Pakhtunkhwa 22020, Pakistan
| | - Munir Ullah Khan
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Zhejiang University, Hangzhou 310027 China
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Muhammad Shehzad Khan
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin City, Hong Kong Special Administrative Region of China
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, Khyber Pakhtunkhwa 22080, Pakistan
| | - Khalil Ur Rehman
- Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan.
| | - Awaji Y Safhi
- Department of Pharmaceutics, College of Pharmacy, Jazan University, Jazan 45142, Saudi Arabia
| | - Mohammed Alissa
- Department of Medical Laboratory, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
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Xiong Y, Alnoud MAH, Ali H, Ali I, Ahmad S, Khan MU, Hassan SSU, Majid M, Khan MS, Ahmad RUS, Khan SU, Khan KA, White A. Beyond the silence: A comprehensive exploration of long non-coding RNAs as genetic whispers and their essential regulatory functions in cardiovascular disorders. Curr Probl Cardiol 2024; 49:102390. [PMID: 38232927 DOI: 10.1016/j.cpcardiol.2024.102390] [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] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 01/14/2024] [Indexed: 01/19/2024]
Abstract
Long non-coding RNAs (lncRNAs) are RNA molecules that regulate gene expression at several levels, including transcriptional, post-transcriptional, and translational. They have a length of more than 200 nucleotides and cannot code. Many human diseases have been linked to aberrant lncRNA expression, highlighting the need for a better knowledge of disease etiology to drive improvements in diagnostic, prognostic, and therapeutic methods. Cardiovascular diseases (CVDs) are one of the leading causes of death worldwide. LncRNAs play an essential role in the complex process of heart formation, and their abnormalities have been associated with several CVDs. This Review article looks at the roles and relationships of long non-coding RNAs (lncRNAs) in a wide range of CVDs, such as heart failure, myocardial infarction, atherosclerosis, and cardiac hypertrophy. In addition, the review delves into the possible uses of lncRNAs in diagnostics, prognosis, and clinical treatments of cardiovascular diseases. Additionally, it considers the field's future prospects while examining how lncRNAs might be altered and its clinical applications.
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Affiliation(s)
- Yuchen Xiong
- Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University),410001,Hunan,China.
| | - Mohammed A H Alnoud
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA, 70112, USA.
| | - Hamid Ali
- Department of Biosciences, COMSATS University Islamabad, Park Road Tarlai Kalan, Islamabad, 44000.
| | - Ijaz Ali
- Centre for Applied Mathematics and Bioinformatics, Gulf University for Science and Technology, Hawally, 32093, Kuwait.
| | - Saleem Ahmad
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, 70112, LA, USA
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
| | - Syed Shams Ul Hassan
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310002, China.
| | - Muhammad Majid
- Faculty of Pharmacy, Hamdard University, Islamabad, 45550, Pakistan
| | - Muhammad Shehzad Khan
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin city, (HKSAR), Hong Kong
| | - Rafi U Shan Ahmad
- Department of Biomedical Engineering, City university of Hong Kong, Kowloon City, Hong Kong.
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
| | - Khalid Ali Khan
- Applied College, Center of Bee Research and its Products, Unit of Bee Research and Honey Production, and Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Alexandra White
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310002, China.
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Khan AR, Alnoud MAH, Ali H, Ali I, Ahmad S, Ul Hassan SS, Shaikh AL, Hussain T, Khan MU, Khan SU, Khan MS, Khan SU. Beyond the beat: A pioneering investigation into exercise modalities for alleviating diabetic cardiomyopathy and enhancing cardiac health. Curr Probl Cardiol 2024; 49:102222. [PMID: 38000567 DOI: 10.1016/j.cpcardiol.2023.102222] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 11/18/2023] [Indexed: 11/26/2023]
Abstract
Patients with preexisting cardiovascular disease or those at high risk for developing the condition are often offered exercise as a form of therapy. Patients with cancer who are at an increased risk for cardiovascular issues are increasingly encouraged to participate in exercise-based, interdisciplinary programs due to the positive correlation between these interventions and clinical outcomes following myocardial infarction. Diabetic cardiomyopathy (DC) is a cardiac disorder that arises due to disruptions in the homeostasis of individuals with diabetes. One of the primary reasons for mortality in individuals with diabetes is the presence of cardiac structural damage and functional abnormalities, which are the primary pathological features of DC. The aetiology of dilated cardiomyopathy is multifaceted and encompasses a range of processes, including metabolic abnormalities, impaired mitochondrial function, dysregulation of calcium ion homeostasis, excessive cardiomyocyte death, and fibrosis. In recent years, many empirical investigations have demonstrated that exercise training substantially impacts the prevention and management of diabetes. Exercise has been found to positively impact the recovery of diabetes and improve several metabolic problem characteristics associated with DC. One potential benefit of exercise is its ability to increase systolic activity, which can enhance cardiometabolic and facilitate the repair of structural damage to the heart caused by DC, leading to a direct improvement in cardiac health. In contrast, exercise has the potential to indirectly mitigate the pathological progression of DC through its ability to decrease circulating levels of sugar and fat while concurrently enhancing insulin sensitivity. A more comprehensive understanding of the molecular mechanism via exercise facilitates the restoration of DC disease must be understood. Our goal in this review was to provide helpful information and clues for developing new therapeutic techniques for motion alleviation DC by examining the molecular mechanisms involved.
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Affiliation(s)
- Ahsan Riaz Khan
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Mohammed A H Alnoud
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
| | - Hamid Ali
- Department of Biosciences, COMSATS University Islamabad, Park Road Tarlai Kalan, Islamabad 44000, Pakistan
| | - Ijaz Ali
- Centre for Applied Mathematics and Bioinformatics, Gulf University for Science and Technology, Hawally 32093, Kuwait
| | - Saleem Ahmad
- Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans 70112 LA, USA
| | - Syed Shams Ul Hassan
- Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310002, China
| | | | - Talib Hussain
- Women Dental College Abbottabad, KPK, 22020, Pakistan
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Muhammad Shehzad Khan
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin city, (HKSAR), Hong Kong
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, 22080, Khyber Pakhtunkhwa, Pakistan.
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Khan MS, Khan SU, Khan SU, Suleman M, Shan Ahmad RU, Khan MU, Tayyeb JZ, Crovella S, Harlina PW, Saeed S. Cardiovascular diseases crossroads: cGAS-STING signaling and disease progression. Curr Probl Cardiol 2024; 49:102189. [PMID: 37956918 DOI: 10.1016/j.cpcardiol.2023.102189] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 11/09/2023] [Indexed: 11/21/2023]
Abstract
It is now widely accepted that inflammation is critical in cardiovascular diseases (CVD). Here, studies are being conducted on how cyclic GMP-AMP synthase (cGAS), a component of innate immunity's DNA-sensing machinery, communicates with the STING receptor, which is involved in activating the immune system's antiviral response. Significantly, a growing body of research in recent years highlights the strong activation of the cGAS-STING signalling pathways in several cardiovascular diseases, such as myocardial infarction, heart failure, and myocarditis. This developing collection of research emphasises these pathways' crucial role in initiating and advancing cardiovascular disease. In this extensive narrative, we explore the role of the cGAS-STING pathway in the development of CVD. We elaborate on the basic mechanisms involved in the onset and progression of CVD. This review explores the most recent developments in the recognition and characterization of cGAS-STING pathway. Additionally, it considers the field's future prospects while examining how cGAS-STING pathway might be altered and its clinical applications for cardiovascular diseases.
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Affiliation(s)
- Muhammad Shehzad Khan
- Hong Kong Centre for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin City, Hong Kong (HKSAR), PR China; Department of Physics, College of Science, City University of Hong Kong, Kowloon City, Hong Kong (HKSAR), PR China
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, PR China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, Khyber Pakhtunkhwa 22080, Pakistan.
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, PR China
| | - Muhammad Suleman
- Laboratory of Animal Research Center (LARC), Qatar University, Doha, Qatar; Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Rafi U Shan Ahmad
- Department of Biomedical Engineering, City university of Hong Kong, Kowloon City, Hong Kong (HKSAR), PR China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, PR China
| | - Jehad Zuhair Tayyeb
- Department of Clinical Biochemistry, College of Medicine, University of Jeddah, Jeddah 23890, Saudi Arabia
| | - Sergio Crovella
- Laboratory of Animal Research Center (LARC), Qatar University, Doha, Qatar
| | - Putri Widyanti Harlina
- Department of Food Industrial Technology, Faculty of Agro-Industrial Technology, Universitas Padjadjaran, Bandung 45363, Indonesia
| | - Sumbul Saeed
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
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Khan SU, Khan MU, Suleman M, Inam A, Azhar Ud Din M. Hemophilia Healing with AAV: Navigating the Frontier of Gene Therapy. Curr Gene Ther 2024; 24:CGT-EPUB-137998. [PMID: 38284735 DOI: 10.2174/0115665232279893231228065540] [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] [Received: 09/19/2023] [Revised: 11/30/2023] [Accepted: 12/07/2023] [Indexed: 01/30/2024]
Abstract
Gene therapy for hemophilia has advanced tremendously after thirty years of continual study and development. Advancements in medical science have facilitated attaining normal levels of Factor VIII (FVIII) or Factor IX (FIX) in individuals with haemophilia, thereby offering the potential for their complete recovery. Despite the notable advancements in various countries, there is significant scope for further enhancement in haemophilia gene therapy. Adeno-associated virus (AAV) currently serves as the primary vehicle for gene therapy in clinical trials targeting haemophilia. Subsequent investigations will prioritize enhancing viral capsid structures, transgene compositions, and promoters to achieve heightened transduction efficacy, diminished immunogenicity, and more predictable therapeutic results. The present study indicates that whereas animal models have transduction efficiency that is over 100% high, human hepatocytes are unable to express clotting factors and transduction efficiency to comparable levels. According to the current study, achieving high transduction efficiency and high levels of clotting factor expression in human hepatocytes is still insufficient. It is also crucial to reduce the risk of cellular stress caused by protein overload. Despite encountering various hurdles, the field of haemophilia gene therapy holds promise for the future. As technology continues to advance and mature, it is anticipated that a personalized therapeutic approach will be developed to cure haemophilia effectively.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, People's Republic of China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Muhammad Suleman
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Amrah Inam
- School of Life Science and Technology, Institute of Biomedical Engineering and Bioinformatics, Xi'an Jiaotong University
| | - Muhammad Azhar Ud Din
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, P.R. China
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Khan SU, Khan SU, Suleman M, Khan MU, Khan MS, Arbi FM, Hussain T, Mohammed Alsuhaibani A, S Refat M. Natural Allies for Heart Health: Nrf2 Activation and Cardiovascular Disease Management. Curr Probl Cardiol 2024; 49:102084. [PMID: 37714318 DOI: 10.1016/j.cpcardiol.2023.102084] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/17/2023]
Abstract
The term "cardiovascular diseases" (CVD) refers to various ailments that affect the heart and blood vessels, including myocardial ischemia, congenital heart defects, heart failure, rheumatic heart disease, hypertension, peripheral artery disease, atherosclerosis, and cardiomyopathies. Despite significant breakthroughs in preventative measures and treatment choices, CVDs significantly contribute to morbidity and mortality, imposing a considerable financial burden. Oxidative stress (OS) is a fundamental contributor to the development and progression of CVDs, resulting from an inherent disparity in generating reactive oxygen species. The disparity above significantly contributes to the aberrant operation of the cardiovascular system. To tackle this issue, therapeutic intervention primarily emphasizes the nuclear erythroid 2-related factor 2 (Nrf2), a transcription factor crucial in regulating endogenous antioxidant defense systems against OS. The Nrf2 exhibits potential as a promising target for effectively managing CVDs. Significantly, an emerging field of study is around the utilization of natural substances to stimulate the activation of Nrf2, hence facilitating the promotion of cardioprotection. This technique introduces a new pathway for treating CVD. The substances above elicit their advantageous effects by mitigating the impact of OS via initiating Nrf2 signaling. The primary objective of our study is to provide significant insights that can contribute to advancing treatment methods, including natural products. These strategies aim to tackle the obstacles associated with CVDs.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and South west University, College of Agronomy and Biotechnology, Southwest University, Chongqing, China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, Khyber Pakhtunkhwa, Pakistan.
| | - Muhammad Suleman
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan; Laboratory of Animal Research Center (LARC), Qatar University, Doha, Qatar
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | | | | | - Talib Hussain
- Women Dental College Abbottabad, Khyber Pakhtunkhwa, Pakistan
| | - Amnah Mohammed Alsuhaibani
- Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Moamen S Refat
- Department of Chemistry, College of Science, Taif University, Taif, Saudi Arabia
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Khan SU, Khan SU, Suleman M, Khan MU, Alsuhaibani AM, Refat MS, Hussain T, Ud Din MA, Saeed S. The Multifunctional TRPC6 Protein: Significance in the Field of Cardiovascular Studies. Curr Probl Cardiol 2024; 49:102112. [PMID: 37774899 DOI: 10.1016/j.cpcardiol.2023.102112] [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: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/01/2023]
Abstract
Cardiovascular disease is the leading cause of death, medical complications, and healthcare costs. Although recent advances have been in treating cardiovascular disorders linked with a reduced ejection fraction, acutely decompensate cardiac failure remains a significant medical problem. The transient receptor potential cation channel (TRPC6) family responds to neurohormonal and mechanical stress, playing critical roles in cardiovascular diseases. Therefore, TRP C6 channels have great promise as therapeutic targets. Numerous studies have investigated the roles of TRP C6 channels in pain neurons, highlighting their significance in cardiovascular research. The TRPC6 protein exhibits a broad distribution in various organs and tissues, including the brain, nerves, heart, blood vessels, lungs, kidneys, gastrointestinal tract, and other bodily structures. Its activation can be triggered by alterations in osmotic pressure, mechanical stimulation, and diacylglycerol. Consequently, TRPC6 plays a significant role in the pathophysiological mechanisms underlying diverse diseases within living organisms. A recent study has indicated a strong correlation between the disorder known as TRPC6 and the development of cardiovascular diseases. Consequently, investigations into the association between TRPC6 and cardiovascular diseases have gained significant attention in the scientific community. This review explores the most recent developments in the recognition and characterization of TRPC6. Additionally, it considers the field's prospects while examining how TRPC6 might be altered and its clinical applications.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China.
| | - Shahid Ullah Khan
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City and Southwest University, College of Agronomy and Biotechnology, Southwest University, Chongqing, China; Department of Biochemistry, Women Medical and Dental College, Khyber Medical University, Abbottabad, Pakistan.
| | - Muhammad Suleman
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Munir Ullah Khan
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Zhejiang University, Hangzhou, China
| | - Amnah Mohammed Alsuhaibani
- Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Moamen S Refat
- Department of Chemistry, College of Science, Taif University, Taif, Saudi Arabia
| | - Talib Hussain
- Women Dental College, Khyber Medical University, Abbottabad, Pakistan
| | - Muhammad Azhar Ud Din
- Key Laboratory of Medical Science and Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, P.R. China
| | - Sumbul Saeed
- School of Environment and Science, Griffith University, Nathan, QLD, Australia
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Khan I, Khan MU, Umar R, Rai N. Occurrence, speciation, and controls on arsenic mobilization in the alluvial aquifer system of the Ghaghara basin, India. Environ Geochem Health 2023; 45:7933-7956. [PMID: 37505348 DOI: 10.1007/s10653-023-01691-9] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 07/11/2023] [Indexed: 07/29/2023]
Abstract
High concentrations of arsenic (As) in groundwater are among the long-standing environmental problems on the planet. Due to adverse impacts on the human and aquatic system, characterization and quantification of individual inorganic As species are crucial in understanding the occurrence, environmental fate, behaviour, and toxicity in natural waters. This study presents As concentration and its speciation As(III) and As(V) data, including the interrelationship with other major and trace aqueous solutes from parts of the Ghaghara basin, India. More than half (57%) of the groundwater samples exhibited elevated As concentrations (> 10 μg/L), whereas 67.4% of samples have higher As(III) values relative to As(V), signifying a potential risk of As(III) toxicity. The elevated concentration of As was associated with higher Fe, Mn, and HCO3-, especially in samples from shallow well depth. PHREEQC modeling demonstrates the presence of mineral phases such as hematite, goethite, rhodochrosite, etc. Therefore, it is inferred that the release of As from sediment particles into pore water via microbially mediated Fe/Mn oxyhydroxides, and As(V) reduction processes mainly control high As concentrations. The heavy metal pollution indices (HPI) and (HEI) values revealed heavy metal pollution in low-lying areas deposited by relatively younger sediments along the Ghaghara River. Large-scale agricultural practices, overexploitation of groundwater, and indiscriminate sewage disposal, in addition to geogenic factors, cannot be ruled out as potential contributors to As mobilization in the region. This study recommends conducting seasonal hydrogeochemical monitoring and investigating regional natural background levels of As, to precisely understand the controlling mechanistic pathways of As release.
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Affiliation(s)
- Imran Khan
- Department of Geology, Aligarh Muslim University, Aligarh, UP, 202002, India.
| | - M U Khan
- Department of Earth Sciences, Indian Institute of Technology, Roorkee, Roorkee, 247 667, India
| | - Rashid Umar
- Department of Geology, Aligarh Muslim University, Aligarh, UP, 202002, India
| | - Nachiketa Rai
- Department of Earth Sciences, Indian Institute of Technology, Roorkee, Roorkee, 247 667, India
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Khan IM, Khan SU, Sala HSS, Khan MU, Ud Din MA, Khan S, Hassan SSU, Khan NM, Liu Y. TME-targeted approaches of brain metastases and its clinical therapeutic evidence. Front Immunol 2023; 14:1131874. [PMID: 37228619 PMCID: PMC10204080 DOI: 10.3389/fimmu.2023.1131874] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 04/17/2023] [Indexed: 05/27/2023] Open
Abstract
The tumor microenvironment (TME), which includes both cellular and non-cellular elements, is now recognized as one of the major regulators of the development of primary tumors, the metastasis of which occurs to specific organs, and the response to therapy. Development of immunotherapy and targeted therapies have increased knowledge of cancer-related inflammation Since the blood-brain barrier (BBB) and blood-cerebrospinal fluid barrier (BCB) limit immune cells from entering from the periphery, it has long been considered an immunological refuge. Thus, tumor cells that make their way "to the brain were believed to be protected from the body's normal mechanisms of monitoring and eliminating them. In this process, the microenvironment and tumor cells at different stages interact and depend on each other to form the basis of the evolution of tumor brain metastases. This paper focuses on the pathogenesis, microenvironmental changes, and new treatment methods of different types of brain metastases. Through the systematic review and summary from macro to micro, the occurrence and development rules and key driving factors of the disease are revealed, and the clinical precision medicine of brain metastases is comprehensively promoted. Recent research has shed light on the potential of TME-targeted and potential treatments for treating Brain metastases, and we'll use that knowledge to discuss the advantages and disadvantages of these approaches.
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Affiliation(s)
- Ibrar Muhammad Khan
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Hari Siva Sai Sala
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | | | - Samiullah Khan
- Institute of Entomology, Guizhou University, Scientific Observing and Experimental Station of Crop Pests, Guiyang, Ministry of Agricultural and Affairs, Guiyang, China
| | - Syed Shams ul Hassan
- Department of Natural Product Chemistry, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Nazir Muhammad Khan
- Department of Zoology, University of Science and Technology, Bannu, Pakistan
| | - Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
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12
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Khan MU, Rai N. Distribution, geochemical behavior, and risk assessment of arsenic in different floodplain aquifers of middle Gangetic basin, India. Environ Geochem Health 2023; 45:2099-2115. [PMID: 35809199 DOI: 10.1007/s10653-022-01321-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
The present study interprets the distribution and geochemical behavior of As in groundwaters of different regions along the floodplains of Ganga river (Varanasi, Ghazipur, Ballia), Ghaghara river (Lakhimpur Kheri, Gonda, Basti), and Rapti river (Balrampur, Shrawasti) in the middle Gangetic basin, India for risk assessment (non-carcinogenic and carcinogenic). The concentration of As in groundwaters of these floodplains ranged from 0.12 to 348 μg/L (mean 24 μg/L), with around ~ 37% of groundwater samples exceeding the WHO limit of 10 μg/L in drinking water. Highest As concentration (348 μg/L) was recorded in groundwater samples from Ballia (Ganga Floodplains), where 50% of the samples had As > 10 μg/L in groundwater. In the study area, a relatively higher mean concentration was recorded in deep wells (28.5 μg/L) compared to shallow wells (20 μg/L). Most of the high As-groundwaters were associated with the high Fe, bicarbonate and low nitrate and sulfate concentrations indicating the release of As via reductive dissolution of Fe oxyhydroxides. The saturation index values of the Fe minerals such as goethite, hematite, ferrihydrite, and siderite showed the oversaturation to near equilibrium in groundwater, suggesting that these mineral phases may act as source/sink of As in the aquifers of the study area. The health risk assessment results revealed that a large number of people in the study area were prone to carcinogenic and non-carcinogenic health risks due to daily consumption of As-polluted groundwater. The highest risks were estimated for the aquifers of Ganga floodplains, as indicated by their mean HQ (41.47) and CR (0.0142) values.
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Affiliation(s)
- M U Khan
- Department of Earth Sciences, Indian Institute of Technology, Roorkee, Uttarakhand, 247 667, India
| | - N Rai
- Department of Earth Sciences, Indian Institute of Technology, Roorkee, Uttarakhand, 247 667, India.
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Khan SU, Khan IM, Khan MU, Ud Din MA, Khan MZ, Khan NM, Liu Y. Role of LGMN in tumor development and its progression and connection with the tumor microenvironment. Front Mol Biosci 2023; 10:1121964. [PMID: 36825203 PMCID: PMC9942682 DOI: 10.3389/fmolb.2023.1121964] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [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: 12/12/2022] [Accepted: 01/27/2023] [Indexed: 02/10/2023] Open
Abstract
Legumain (LGMN) has been demonstrated to be overexpressed not just in breast, prostatic, and liver tumor cells, but also in the macrophages that compose the tumor microenvironment. This supports the idea that LGMN is a pivotal protein in regulating tumor development, invasion, and dissemination. Targeting LGMN with siRNA or chemotherapeutic medicines and peptides can suppress cancer cell proliferation in culture and reduce tumor growth in vivo. Furthermore, legumain can be used as a marker for cancer detection and targeting due to its expression being significantly lower in normal cells compared to tumors or tumor-associated macrophages (TAMs). Tumor formation is influenced by aberrant expression of proteins and alterations in cellular architecture, but the tumor microenvironment is a crucial deciding factor. Legumain (LGMN) is an in vivo-active cysteine protease that catalyzes the degradation of numerous proteins. Its precise biological mechanism encompasses a number of routes, including effects on tumor-associated macrophage and neovascular endothelium in the tumor microenvironment. The purpose of this work is to establish a rationale for thoroughly investigating the function of LGMN in the tumor microenvironment and discovering novel tumor early diagnosis markers and therapeutic targets by reviewing the function of LGMN in tumor genesis and progression and its relationship with tumor milieu.
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Affiliation(s)
- Safir Ullah Khan
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China,Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Ibrar Muhammad Khan
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China,*Correspondence: Ibrar Muhammad Khan, ; Yong Liu,
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, International Research Center for X Polymers, Zhejiang University, Hangzhou, China
| | - Muhammad Azhar Ud Din
- Faculty of Pharmacy, Gomal University Dera Ismail Khan KPK, Dera IsmailKhan, Pakistan
| | - Muhammad Zahoor Khan
- Department of Animal Breeding and Genetics, Faculty of Veterinary and Animal Sciences, University of Agriculture, Dera IsmailKhan, Pakistan
| | - Nazir Muhammad Khan
- Department of Zoology, University of Science and Technology, Bannu, Pakistan
| | - Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China,*Correspondence: Ibrar Muhammad Khan, ; Yong Liu,
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Ullah Khan M, Ullah Khan S, Cao X, Usman M, Yue X, Ghaffar A, Hassan M, Zhang C, Zhang X. Copolymerization of Carbonyl Sulfide and Propylene Oxide via a Heterogeneous Prussian Blue Analogue Catalyst with High Productivity and Selectivity. Chem Asian J 2023; 18:e202201050. [PMID: 36342176 DOI: 10.1002/asia.202201050] [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] [Received: 10/14/2022] [Revised: 11/01/2022] [Indexed: 11/09/2022]
Abstract
This study demonstrates the superiority of a stable and well-defined heterogeneous cobalt hexacyanocobaltate (Co3 [Co(CN)6 ]2 ), a typical cobalt Prussian Blue Analogue (CoCo-PBA) that catalyzes the copolymerization of carbonyl sulfide (COS) and propylene oxide (PO) to produce poly(propylene monothiocarbonate)s (PPMTC). The number-average molecular weights of the PPMTC were 66.4 to 139.4 kg/mol, with a polydispersity of 2.0-3.9. The catalyst productivity reached 1040 g polymer/g catalyst (12.0 h). The oxygen-sulfur exchange reaction (O/S ER), which would generate random thiocarbonate and carbonate units, was effectively suppressed, and thus the selectivity of the monothiocarbonate over carbonate linkages was up to >99%. It was shown that no cyclic thiocarbonate byproduct was produced during the heterogeneous catalysis of COS/PO copolymerization using CoCo-PBA as the catalyst. The content of monothiocarbonate and ether units in the copolymer chain could be regulated by tuning the feeding amount of COS.
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Affiliation(s)
- Munir Ullah Khan
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Science at the Microscale, School of Life Sciences, University of Science and Technology of China, 230027, Hefei, P. R. China
| | - Xiaohan Cao
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Muhammad Usman
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinchen Yue
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Abdul Ghaffar
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Muhammad Hassan
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Chengjian Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinghong Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China.,Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, 030013, Shanxi, P. R. China
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Khan SU, Khan MU, Azhar Ud Din M, Khan IM, Khan MI, Bungau S, Hassan SSU. Reprogramming tumor-associated macrophages as a unique approach to target tumor immunotherapy. Front Immunol 2023; 14:1166487. [PMID: 37138860 PMCID: PMC10149956 DOI: 10.3389/fimmu.2023.1166487] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [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: 02/15/2023] [Accepted: 04/04/2023] [Indexed: 05/05/2023] Open
Abstract
In the last ten years, it has become increasingly clear that tumor-infiltrating myeloid cells drive not just carcinogenesis via cancer-related inflammatory processes, but also tumor development, invasion, and metastasis. Tumor-associated macrophages (TAMs) in particular are the most common kind of leucocyte in many malignancies and play a crucial role in establishing a favorable microenvironment for tumor cells. Tumor-associated macrophage (TAM) is vital as the primary immune cell subset in the tumor microenvironment (TME).In order to proliferate and spread to new locations, tumors need to be able to hide from the immune system by creating an immune-suppressive environment. Because of the existence of pro-tumoral TAMs, conventional therapies like chemotherapy and radiotherapy often fail to restrain cancer growth. These cells are also to blame for the failure of innovative immunotherapies premised on immune-checkpoint suppression. Understanding the series of metabolic changes and functional plasticity experienced by TAMs in the complex TME will help to use TAMs as a target for tumor immunotherapy and develop more effective tumor treatment strategies. This review summarizes the latest research on the TAMs functional status, metabolic changes and focuses on the targeted therapy in solid tumors.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
| | - Muhammad Azhar Ud Din
- Faculty of Pharmacy, Gomal University Dera Ismail Khan KPK, Dera Ismail Khan, Pakistan
| | - Ibrar Muhammad Khan
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering Fuyang Normal University, Fuyang, China
| | - Muhammad Imran Khan
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
- *Correspondence: Simona Bungau, ; Syed Shams ul Hassan,
| | - Syed Shams ul Hassan
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
- Department of Natural Product Chemistry, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Simona Bungau, ; Syed Shams ul Hassan,
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Khan SU, Khan MU, Khan MI, Kalsoom F, Zahra A. Current Landscape and Emerging Opportunities of Gene Therapy with Non-viral Episomal Vectors. Curr Gene Ther 2023; 23:135-147. [PMID: 36200188 DOI: 10.2174/1566523222666221004100858] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 03/23/2022] [Revised: 06/10/2022] [Accepted: 06/10/2022] [Indexed: 11/22/2022]
Abstract
Gene therapy has proven to be extremely beneficial in the management of a wide range of genetic disorders for which there are currently no or few effective treatments. Gene transfer vectors are very significant in the field of gene therapy. It is possible to attach a non-viral attachment vector to the donor cell chromosome instead of integrating it, eliminating the negative consequences of both viral and integrated vectors. It is a safe and optimal express vector for gene therapy because it does not cause any adverse effects. However, the modest cloning rate, low expression, and low clone number make it unsuitable for use in gene therapy. Since the first generation of non-viral attachment episomal vectors was constructed, various steps have been taken to regulate their expression and stability, such as truncating the MAR element, lowering the amount of CpG motifs, choosing appropriate promoters and utilizing regulatory elements. This increases the transfection effectiveness of the non-viral attachment vector while also causing it to express at a high level and maintain a high level of stability. A vector is a genetic construct commonly employed in gene therapy to treat various systemic disorders. This article examines the progress made in the development of various optimization tactics for nonviral attachment vectors and the future applications of these vectors in gene therapy.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, People's Republic of China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Muhammad Imran Khan
- School of Life Sciences and Medicine, University of Science and Technology of China,Hefei 230027,People's Republic of China
- Department of Pathology, District Headquarters Hospital Jhang 35200, Punjab Province, Islamic Republic of Pakistan
| | - Fadia Kalsoom
- Department of Pathology, District Headquarters Hospital Jhang 35200, Punjab Province, Islamic Republic of Pakistan
| | - Aqeela Zahra
- Department of Family and Community Medicine. College of Medicine, University of Ha'il, Ha'il 81451, Saudi Arabia
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Khan SU, Khan MI, Khan MU, Khan NM, Bungau S, Hassan SSU. Applications of Extracellular Vesicles in Nervous System Disorders: An Overview of Recent Advances. Bioengineering (Basel) 2022; 10:bioengineering10010051. [PMID: 36671622 PMCID: PMC9854809 DOI: 10.3390/bioengineering10010051] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/19/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023]
Abstract
Diseases affecting the brain and spinal cord fall under the umbrella term "central nervous system disease". Most medications used to treat or prevent chronic diseases of the central nervous system cannot cross the blood-brain barrier (BBB) and hence cannot reach their intended target. Exosomes facilitate cellular material movement and signal transmission. Exosomes can pass the blood-brain barrier because of their tiny size, high delivery efficiency, minimal immunogenicity, and good biocompatibility. They enter brain endothelial cells via normal endocytosis and reverse endocytosis. Exosome bioengineering may be a method to produce consistent and repeatable isolation for clinical usage. Because of their tiny size, stable composition, non-immunogenicity, non-toxicity, and capacity to carry a wide range of substances, exosomes are indispensable transporters for targeted drug administration. Bioengineering has the potential to improve these aspects of exosomes significantly. Future research into exosome vectors must focus on redesigning the membrane to produce vesicles with targeting abilities to increase exosome targeting. To better understand exosomes and their potential as therapeutic vectors for central nervous system diseases, this article explores their basic biological properties, engineering modifications, and promising applications.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Muhammad Imran Khan
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | | | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, 410028 Oradea, Romania
- Correspondence: (S.B.); (S.S.u.H.)
| | - Syed Shams ul Hassan
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Natural Product Chemistry, School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
- Correspondence: (S.B.); (S.S.u.H.)
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Khan SU, Khan MU, Gao Y, Khan MI, Puswal SM, Zubair M, Khan MA, Farwa R, Gao S, Ali R, Hussain N. Unique therapeutic potentialities of exosomes based nanodrug carriers to target tumor microenvironment in cancer therapy. OpenNano 2022. [DOI: 10.1016/j.onano.2022.100091] [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: 12/05/2022]
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Kiriratnikom J, Guo J, Cao X, Khan MU, Zhang C, Zhang X. Metal‐free terpolymerization of propylene oxide, carbon dioxide, and carbonyl sulfide: A facile route to sulfur‐containing polycarbonates with gradient sequences. Journal of Polymer Science 2022. [DOI: 10.1002/pol.20220166] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiraya Kiriratnikom
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
| | - Jiafang Guo
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
| | - Xiaohan Cao
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
| | - Munir Ullah Khan
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
| | - Chengjian Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
| | - Xinghong Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering Zhejiang University Hangzhou China
- Center of Chemistry for Frontier Technologies Zhejiang University Hangzhou China
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Bahsoun MA, Khan MU, Mitha S, Ghazvanchahi A, Khosravani H, Jabehdar Maralani P, Tardif JC, Moody AR, Tyrrell PN, Khademi A. FLAIR MRI biomarkers of the normal appearing brain matter are related to cognition. Neuroimage Clin 2022; 34:102955. [PMID: 35180579 PMCID: PMC8857609 DOI: 10.1016/j.nicl.2022.102955] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 01/28/2022] [Accepted: 02/01/2022] [Indexed: 01/04/2023]
Abstract
Normal appearing brain matter (NABM) biomarkers in FLAIR MRI are related to cognition. NABM texture in FLAIR MRI is correlated to mean diffusivity (MD) in dMRI. Analysis conducted on large multicentre FLAIR MRI dataset: 1400 subjects, 87 centers. NABM biomarkers vary differently across age and MoCA categories. Biomarkers showed differences in patients with AD dementia and vascular disease.
A novel biomarker panel was proposed to quantify macro and microstructural biomarkers from the normal-appearing brain matter (NABM) in multicentre fluid-attenuation inversion recovery (FLAIR) MRI. The NABM is composed of the white and gray matter regions of the brain, with the lesions and cerebrospinal fluid removed. The primary hypothesis was that NABM biomarkers from FLAIR MRI are related to cognitive outcome as determined by MoCA score. There were three groups of features designed for this task based on 1) texture: microstructural integrity (MII), macrostructural damage (MAD), microstructural damage (MID), 2) intensity: median, skewness, kurtosis and 3) volume: NABM to ICV volume ratio. Biomarkers were extracted from over 1400 imaging volumes from more than 87 centres and unadjusted ANOVA analysis revealed significant differences in means of the MII, MAD, and NABM volume biomarkers across all cognitive groups. In an adjusted ANCOVA model, a significant relationship between MoCA categories was found that was dependent on subject age for MII, MAD, intensity, kurtosis and NABM volume biomarkers. These results demonstrate that structural brain changes in the NABM are related to cognitive outcome (with different relationships depending on the age of the subjects). Therefore these biomarkers have high potential for clinical translation. As a secondary hypothesis, we investigated whether texture features from FLAIR MRI can quantify microstructural changes related to how “structured” or “damaged” the tissue is. Based on correlation analysis with diffusion weighted MRI (dMRI), it was shown that FLAIR MRI texture biomarkers (MII and MAD) had strong correlations to mean diffusivity (MD) which is related to tissue degeneration in the GM and WM regions. As FLAIR MRI is routinely collected for clinical neurological examinations, novel biomarkers from FLAIR MRI could be used to supplement current clinical biomarkers and for monitoring disease progression. Biomarkers could also be used to stratify patients into homogeneous disease subgroups for clinical trials, or to learn more about mechanistic development of dementia disease.
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Affiliation(s)
- M-A Bahsoun
- Electrical, Computer and Biomedical Engineering Dept., Ryerson University, Toronto, ON, Canada
| | - M U Khan
- Electrical, Computer and Biomedical Engineering Dept., Ryerson University, Toronto, ON, Canada
| | - S Mitha
- Electrical, Computer and Biomedical Engineering Dept., Ryerson University, Toronto, ON, Canada
| | - A Ghazvanchahi
- Electrical, Computer and Biomedical Engineering Dept., Ryerson University, Toronto, ON, Canada
| | - H Khosravani
- Hurvitz Brain Sciences Program Division of Neurology, Department of Medicine, University of Toronto, Toronto, ON, Canada
| | | | - J-C Tardif
- Montreal Heart Institute, Montreal, QU, Canada; Department of Medicine, Université de Montréal, QU, Canada
| | - A R Moody
- Department of Medical Imaging, University of Toronto, Toronto, ON, Canada
| | - P N Tyrrell
- Department of Medical Imaging, University of Toronto, Toronto, ON, Canada; Department of Statistical Sciences, University of Toronto, Toronto, ON, Canada; Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - A Khademi
- Electrical, Computer and Biomedical Engineering Dept., Ryerson University, Toronto, ON, Canada; Keenan Research Center for Biomedical Science, St. Michael's Hospital, Unity Health Network, Toronto, ON, Canada; Institute for Biomedical Engineering, Science and Technology (iBEST), a partnership between St. Michael's Hospital and Ryerson University, Toronto, ON, Canada
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Khan SU, Khan MU, Kalsoom F, Khan MI, Gao S, Unar A, Zubair M, Bilal M. Mechanisms of gene regulation by histone degradation in adaptation of yeast: an overview of recent advances. Arch Microbiol 2022; 204:287. [PMID: 35482104 DOI: 10.1007/s00203-022-02897-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 12/29/2021] [Revised: 03/12/2022] [Accepted: 04/04/2022] [Indexed: 02/07/2023]
Abstract
Histones are important component of eukaryotic cells chromatin and consist of arginine and lysine residues. Histones play an important role in the protection of DNA. Their contents significantly affect high-level chromatin structure formation, gene expression, DNA replication, and other important life activities. Protein degradation is an important regulatory mechanism of histone content. Recent studies have revealed that modification of amino acid sequence is directly related to histone breakdown. In addition, histone degradation is closely related to covalent modifications, such as ubiquitination and acetylation, which are considered to be driving factors in gene regulation. Gene regulation is an important mechanism in adaptation to the environment and survival of species. With the introduction of highly efficient technology, various mutations in histones have been identified in yeast. In the field of epigenetics and the transmission of chromatin states, two widely used model organisms are the budding yeast Saccharomyces cerevisiae and Schizosaccharomyces pombe. Higher eukaryotes can use their silent loci to maintain their epigenetic states and providing the base to investigate mechanisms underlying development. Therfore, both species have contributed a plethora of information on these mechanisms in both yeast and higher eukaryotes. This study focuses on the role of histone modifications in controlling telomeric silencing in Saccharomyces cerevisiae and centromeric silencing in S. pombe as examples of genetic loci that demonstrate epigenetic inheritance. In view of recent advances, this review focuses on the post-translational modification of histone amino acid residues and reviews the relationship between histone degradation and amino acid residue modification.
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Affiliation(s)
- Safir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Munir Ullah Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China
| | - Fadia Kalsoom
- Department of Microbiology, Ajou University School of Medicine, Suwon, 16499, Republic of Korea
| | - Muhammad Imran Khan
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China.
- Hefei National Laboratory for Physical Sciences at Microscale and the Center for Biomedical Engineering, University of Science and Technology of China, Hefei, 230027, People's Republic of China.
- Department of Pathology, District headquarters hospital, Jhang, 35200, Punjab Province, Islamic Republic of Pakistan.
| | - Shuang Gao
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Ahsanullah Unar
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Muhammad Zubair
- School of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, People's Republic of China
- The First Affiliated Hospital of USTC, Hefei National Laboratory for Physical Sciences at Microscale, School of Basic Medical Sciences, University of Science and Technology of China, Hefei, 230027, People's Republic of China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, People's Republic of China.
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Khan MU, Khan SU, Kiriratnikom J, Zareen S, Zhang XH. Mesoporous Prussian Blue as the highly effective and selective catalyst for CO2 conversion into cyclic carbonates under mild conditions. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115640] [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: 10/19/2022]
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Khan MU, Khan SU, Kiriratnikom J, Zareen S, Zhang X. CoCo-PBA/tetrabutylammonium bromide as highly efficient catalyst for CO2 and epoxides coupling reaction under mild conditions. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.06.002] [Citation(s) in RCA: 3] [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] [Indexed: 11/30/2022]
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Kiriratnikom J, Yue XC, Yang JL, Wang Y, Chen SH, Zhang KK, Zhang CJ, Khan MU, Zhang XH. Unprecedentedly high active organocatalysts for the copolymerization of carbonyl sulfide and propylene oxide: steric hindrance effect of tertiary amines. Polym Chem 2021. [DOI: 10.1039/d1py01013a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The TEB/DMCHA pair shows exceedingly high turnover frequency of 69 800 h−1 for organocatalytic COS/PO copolymerization at 60 °C under solvent-free conditions.
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Affiliation(s)
- Jiraya Kiriratnikom
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Xin-Chen Yue
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Jia-Liang Yang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Ying Wang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Shuo-Hong Chen
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Ke-Ke Zhang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Cheng-Jian Zhang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Munir Ullah Khan
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Xing-Hong Zhang
- Department of Polymer Science and Engineering, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
- Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China
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Azam F, Taban IM, Eid EEM, Iqbal M, Alam O, Khan S, Mahmood D, Anwar MJ, Khalilullah H, Khan MU. An in-silico analysis of ivermectin interaction with potential SARS-CoV-2 targets and host nuclear importin α. J Biomol Struct Dyn 2020; 40:2851-2864. [PMID: 33131430 PMCID: PMC7643422 DOI: 10.1080/07391102.2020.1841028] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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] [Indexed: 02/07/2023]
Abstract
Ivermectin (IVM) is a broad-spectrum antiparasitic agent, having inhibitory potential against wide range of viral infections. It has also been found to hamper SARS-CoV-2 replication in vitro, and its precise mechanism of action against SARS-CoV-2 is yet to be understood. IVM is known to interact with host importin (IMP)α directly and averts interaction with IMPβ1, leading to the prevention of nuclear localization signal (NLS) recognition. Therefore, the current study seeks to employ molecular docking, molecular mechanics generalized Born surface area (MM-GBSA) analysis and molecular dynamics simulation studies for decrypting the binding mode, key interacting residues as well as mechanistic insights on IVM interaction with 15 potential drug targets associated with COVID-19 as well as IMPα. Among all COVID-19 targets, the non-structural protein 9 (Nsp9) exhibited the strongest affinity to IVM showing -5.30 kcal/mol and -84.85 kcal/mol binding energies estimated by AutoDock Vina and MM-GBSA, respectively. However, moderate affinity was accounted for IMPα amounting -6.9 kcal/mol and -66.04 kcal/mol. Stability of the protein-ligand complexes of Nsp9-IVM and IMPα-IVM was ascertained by 100 ns trajectory of all-atom molecular dynamics simulation. Structural conformation of protein in complex with docked IVM exhibited stable root mean square deviation while root mean square fluctuations were also found to be consistent. In silico exploration of the potential targets and their interaction profile with IVM can assist experimental studies as well as designing of COVID-19 drugs.
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Affiliation(s)
- Faizul Azam
- Department of Pharmaceutical Chemistry & Pharmacognosy, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
| | - Ismail M Taban
- School of Biosciences, Cardiff University, Cardiff, U.K.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Misurata University, Misurata, Libya
| | - Eltayeb E M Eid
- Department of Pharmaceutical Chemistry & Pharmacognosy, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
| | - Muzaffar Iqbal
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Ozair Alam
- Medicinal Chemistry and Molecular Modelling Lab, Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, New Delhi, India
| | - Shamshir Khan
- Department of Pharmaceutical Chemistry, Dentistry and Pharmacy College, Buraydah Private Colleges, Buraydah, Al-Qassim
| | - Danish Mahmood
- Department of Pharmacology & Toxicology, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
| | - Md Jamir Anwar
- Department of Pharmacology & Toxicology, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
| | - Habibullah Khalilullah
- Department of Pharmaceutical Chemistry & Pharmacognosy, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
| | - M U Khan
- Department of Pharmaceutical Chemistry & Pharmacognosy, Unaizah College of Pharmacy, Qassim University, Saudi Arabia
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Alam P, Siddiqui N, Alqahtani A, Haque A, Basudan O, Alqasoumi S, AL-Mishari A, Khan MU. Response surface methodology-based optimization of ultrasound-assisted extraction of β-sitosterol and lupeol from astragalus atropilosus (roots) and validation by HPTLC method. Asian Pac J Trop Biomed 2020. [DOI: 10.4103/2221-1691.283942] [Citation(s) in RCA: 1] [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: 11/04/2022] Open
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Balci Leinen M, Dede D, Khan MU, Çağlayan M, Koçak Y, Demir HV, Ozensoy E. CdTe Quantum Dot-Functionalized P25 Titania Composite with Enhanced Photocatalytic NO 2 Storage Selectivity under UV and Vis Irradiation. ACS Appl Mater Interfaces 2019; 11:865-879. [PMID: 30525435 DOI: 10.1021/acsami.8b18036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Composite systems of P25 (titania) functionalized with thioglycolic acid (TGA)-capped CdTe colloidal quantum dots (QDs) were synthesized, structurally characterized, and photocatalytically tested in the photocatalytic NO x oxidation and storage during NO(g) + O2(g) reaction. Pure P25 yielded moderate-to-high NO conversion (31% in UV-A and 40% in visible (vis)) but exhibited extremely poor selectivity toward NO x storage in solid state (25% in UV-A and 35% in vis). Therefore, P25 could efficiently photooxidize NO(g) + O2(g) into NO2; however, it failed to store photogenerated NO2 and released toxic NO2(g) to the atmosphere. CdTe QD-functionalized P25 revealed a major boost in photocatalytic performance with respect to pure P25, where NO conversion reached 42% under UV-A and 43% under vis illumination, while the respective selectivity climbed up to 92 and 97%, rendering the CdTe/P25 composite system an efficient broad-band photocatalyst, which can harvest both UV-A and vis light efficiently and display a strong NO x abatement effect. Control experiments suggested that photocatalytic active sites responsible for the NO(g) + O2(g) photooxidation and formation of NO2 reside mostly on titania, while the main functions of the TGA capping agent and the CdTe QDs are associated with the photocatalytic conversion of the generated NO2 to the adsorbed NO x species, significantly boosting the selectivity toward solid-state NO x storage. Reuse experiments showed that photocatalytic performance of the CdTe/P25 system can be preserved to a reasonable extent with only a moderate decrease in the photocatalytic performance. Although some decrease in the photocatalytic activity was observed after aging, CdTe/P25 could still outperform P25 benchmark photocatalyst. Increasing CdTe QDs loading from the currently optimized minuscule concentrations could be a useful strategy to increase further the catalytic lifetime/stability of the CdTe/P25 system with only a minor penalty in catalytic activity.
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Affiliation(s)
| | | | | | | | | | - Hilmi Volkan Demir
- School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, and School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
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Zhang W, Wang L, Liu H, Hao Y, Li H, Khan MU, Zeng J. Integration of Quantum Confinement and Alloy Effect to Modulate Electronic Properties of RhW Nanocrystals for Improved Catalytic Performance toward CO 2 Hydrogenation. Nano Lett 2017; 17:788-793. [PMID: 28055214 DOI: 10.1021/acs.nanolett.6b03967] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The d-band center and surface negative charge density generally determine the adsorption and activation of CO2, thus serving as important descriptors of the catalytic activity toward CO2 hydrogenation. Herein, we engineered the d-band center and negative charge density of Rh-based catalysts by tuning their dimensions and introducing non-noble metals to form an alloy. During the hydrogenation of CO2 into methanol, the catalytic activity of Rh75W25 nanosheets was 5.9, 4.0, and 1.7 times as high as that of Rh nanoparticles, Rh nanosheets, and Rh73W27 nanoparticles, respectively. Mechanistic studies reveal that the remarkable activity of Rh75W25 nanosheets is owing to the integration of quantum confinement and alloy effect. Specifically, the quantum confinement in one dimension shifts up the d-band center of Rh75W25 nanosheets, strengthening the adsorption of CO2. Moreover, the alloy effect not only promotes the activation of CO2 to form CO2δ- but also enhances the adsorption of intermediates to facilitate further hydrogenation of the intermediates into methanol.
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Affiliation(s)
- Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Haoyu Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Yiping Hao
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China
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Zhang W, Wang L, Wang K, Khan MU, Wang M, Li H, Zeng J. Integration of Photothermal Effect and Heat Insulation to Efficiently Reduce Reaction Temperature of CO 2 Hydrogenation. Small 2017; 13:1602583. [PMID: 27900833 DOI: 10.1002/smll.201602583] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/15/2016] [Indexed: 06/06/2023]
Abstract
The photothermal effect is applied in CO2 hydrogenation to reduce the reaction temperature under illumination by encapsulating Pt nanocubes and Au nanocages into a zeolitic imidazolate framework (ZIF-8). Under illumination, the heat generated by the photothermal effect of Au nanocages is mainly insulated in the ZIF-8 to form a localized high-temperature region, thereby improving the catalytic activity of Pt nanocubes.
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Affiliation(s)
- Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Kaiwen Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Menglin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Hefei Science Center & National Synchrotron Radiation Laboratory, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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Khan MU, Somaiah S, Muddaiah S, Shetty B, Reddy G, Siddegowda R. Comparison of soft tissue chin thickness in adult patients with various mandibular divergence patterns in Kodava population. Int J Orthod Rehabil 2017. [DOI: 10.4103/ijor.ijor_38_16] [Citation(s) in RCA: 3] [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: 11/04/2022]
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Kaur J, Sidhu S, Chopra K, Khan MU. Calendula officinalis ameliorates l-arginine-induced acute necrotizing pancreatitis in rats. Pharm Biol 2016; 54:2951-2959. [PMID: 27339751 DOI: 10.1080/13880209.2016.1195848] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 05/15/2016] [Accepted: 05/25/2016] [Indexed: 06/06/2023]
Abstract
CONTEXT Calendula officinalis L. (Asteraceae) has been traditionally used in treating inflammation of internal organs, gastrointestinal tract ulcers and wound healing. OBJECTIVE The present study investigates the effect of ethanol extract (95%) of Calendula officinalis flowers in l-arginine induced acute necrotizing pancreatitis in rats. MATERIALS AND METHODS Rats were divided into four groups: normal control, l-arginine control, Calendula officinalis extract (COE) treated and melatonin treated (positive control), which were further divided into subgroups (24 h, day 3 and 14) according to time points. Two injections of l-arginine 2 g/kg i.p. at 1 h intervals were administered in l-arginine control, COE and melatonin-treated groups to produce acute necrotizing pancreatitis. Biochemical parameters [serum amylase, lipase, pancreatic amylase, nucleic acid content, total proteins, transforming growth factor-β1 (TGF-β1), collagen content, lipid peroxidation, reduced glutathione and nitrite/nitrate] and histopathological studies were carried out. RESULTS COE treatment (400 mg/kg p.o.) was found to be beneficial. This was evidenced by significantly lowered histopathological scores (2 at day 14). Nucleic acid content (DNA 21.1 and RNA 5.44 mg/g pancreas), total proteins (0.66 mg/mL pancreas) and pancreatic amylase (1031.3 100 SU/g pancreas) were significantly improved. Marked reduction in pancreatic oxidative and nitrosative stress; collagen (122 μmoles/100 mg pancreas) and TGF-β1 (118.56 pg/mL) levels were noted. Results obtained were comparable to those of positive control. DISCUSSION AND CONCLUSION The beneficial effect of COE may be attributed to its antioxidant, antinitrosative and antifibrotic actions. Hence, the study concludes that COE promotes spontaneous repair and regeneration of the pancreas.
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Affiliation(s)
- Jagdeep Kaur
- a Department of Research Innovations and Consultancy , IKG Punjab Technical University , Kapurthala , Punjab , India
- b Sri Sai College of Pharmacy, Badhani , Pathankot , Punjab , India
| | - Shabir Sidhu
- c Department of Life Sciences and Technology , Punjab Institute of Technology, IKG Punjab Technical University , Kapurthala , Punjab , India
| | - Kanwaljit Chopra
- d Pharmacology Research Laboratory , University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study, Panjab University , Chandigarh , India
| | - M U Khan
- b Sri Sai College of Pharmacy, Badhani , Pathankot , Punjab , India
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Khan MU, Wang L, Liu Z, Gao Z, Wang S, Li H, Zhang W, Wang M, Wang Z, Ma C, Zeng J. Inside Cover: Pt 3
Co Octapods as Superior Catalysts of CO 2
Hydrogenation (Angew. Chem. Int. Ed. 33/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201604910] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhao Liu
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zehua Gao
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Shenpeng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Menglin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhengfei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Chao Ma
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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Abstract
Placenta accreta (an abnormally adherent placenta) is one of the two leading causes of peripartum hemorrhage and the most common indication for peripartum hysterectomy. Placenta accreta may be associated with significant maternal hemorrhage at delivery owing to the incomplete placental separation. When placenta accreta is diagnosed before delivery, a multidisciplinary approach may improve patient outcome.
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Affiliation(s)
- R S Khokhar
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - J Baaj
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - M U Khan
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - F A Dammas
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - N Rashid
- General Practitioner, Gulburg Hospital, Lahore, Pakistan
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Khan MU, Wang L, Liu Z, Gao Z, Wang S, Li H, Zhang W, Wang M, Wang Z, Ma C, Zeng J. Innentitelbild: Pt3
Co Octapods as Superior Catalysts of CO2
Hydrogenation (Angew. Chem. 33/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhao Liu
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zehua Gao
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Shenpeng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Menglin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhengfei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Chao Ma
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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35
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Khan MU, Wang L, Liu Z, Gao Z, Wang S, Li H, Zhang W, Wang M, Wang Z, Ma C, Zeng J. Pt3
Co Octapods as Superior Catalysts of CO2
Hydrogenation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602512] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhao Liu
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zehua Gao
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Shenpeng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Menglin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhengfei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Chao Ma
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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36
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Khan MU, Wang L, Liu Z, Gao Z, Wang S, Li H, Zhang W, Wang M, Wang Z, Ma C, Zeng J. Pt3
Co Octapods as Superior Catalysts of CO2
Hydrogenation. Angew Chem Int Ed Engl 2016; 55:9548-52. [DOI: 10.1002/anie.201602512] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Munir Ullah Khan
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhao Liu
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zehua Gao
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Shenpeng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Menglin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhengfei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Chao Ma
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Hefei Science Center; National Synchrotron Radiation Laboratory & Synergetic Innovation Center of Quantum Information and Quantum Physics; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
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37
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Abstract
Epidermolysis bullosa is a group of inherited rare skin disease, characterized by bullae formation in the skin or mucous membranes. The fundamental abnormality is collagen degeneration leads to splitting of various epidermal layers. Dystrophic epidermolysis bullosa (DEB) is one of the major forms of epidermolysis bullosa. These patients often admitted to the hospital for corrective surgeries, change of dressing, contracture release, and skin grafting. Anesthetic management of these cases is always a challenge. We are reporting a case of 5-year-old boy diagnosed as a case of DEB scheduled for upper lip contracture release, skin grafting and debridement of nonhealing scars under anesthesia. In this case, we have focused mainly on the anesthetic management, preparation of the monitoring, transportation, difficulties in establishing the venous accesses, and airway management.
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Affiliation(s)
- A S Narejo
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - M U Khan
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - W M Alotaibi
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - M M Khan
- Department of Anesthesia, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Singh H, Sidhu S, Chopra K, Khan MU. Hepatoprotective effect of trans-Chalcone on experimentally induced hepatic injury in rats: inhibition of hepatic inflammation and fibrosis. Can J Physiol Pharmacol 2016; 94:879-87. [PMID: 27191034 DOI: 10.1139/cjpp-2016-0071] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 12/31/2022]
Abstract
The current study investigated the hepatoprotective effect of trans-Chalcone in carbon tetrachloride (CCl4) and paracetamol (PCM) induced liver damage in rats. Administration of CCl4 and PCM (1 mL/kg, i.p., 3 days, and 2 g/kg, p.o., single dose, respectively) produced hepatic injury. Ponderal changes (percent change in body mass and relative liver mass) and biochemical parameters (serum ALT, AST, ALP, bilirubin) were estimated. The markers of oxidative and nitrosative stress (TBARS, reduced GSH, nitrite and nitrate), hepatic fibrosis (TGF-β1, collagen content), hepatic inflammation (TNF-α), and histopathological study were evaluated. trans-Chalcone (5, 10, and 20 mg/kg, i.p.) was found to be beneficial as demonstrated by significant reversal of liver histology by perceptible reduction of inflammatory cell infiltration with regenerative changes in hepatocytes. Improvement in percent change in body mass and significant reduction in relative liver mass were observed. Marked reduction in serum levels of ALT, AST, ALP, and bilirubin were noted. Decreases in TBARS and nitrites and nitrates and increases in reduced GSH levels were noted. Hepatic fibrosis and inflammation were significantly decreased. The findings indicate a novel hepatoprotective role for trans-Chalcone by improving hepatic injury by possible actions such as anti-oxidant, anti-nitrosative, anti-fibrotic, and anti-inflammatory. Hence, it can be used as promising hepatoprotective agent.
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Affiliation(s)
- Harsimran Singh
- a Department of Research Innovations and Consultancy, IKG Punjab Technical University, Kapurthala, Punjab 144 601, India.,d Sri Sai College of Pharmacy, Badhani, Pathankot, Punjab 145 001, India
| | - Shabir Sidhu
- b Department of Life Sciences, Punjab Institute of Technology, IKG Punjab Technical University Kapurthala, Punjab 144 601, India
| | - Kanwaljit Chopra
- c Pharmacology Research Laboratory, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study, Panjab University, Chandigarh 160 014, India
| | - M U Khan
- d Sri Sai College of Pharmacy, Badhani, Pathankot, Punjab 145 001, India
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39
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Wang M, Wang L, Li H, Du W, Khan MU, Zhao S, Ma C, Li Z, Zeng J. Ratio-Controlled Synthesis of CuNi Octahedra and Nanocubes with Enhanced Catalytic Activity. J Am Chem Soc 2015; 137:14027-30. [DOI: 10.1021/jacs.5b08289] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Menglin Wang
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Liangbing Wang
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hongliang Li
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Wenpeng Du
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Munir Ullah Khan
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Songtao Zhao
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Chao Ma
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhenyu Li
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jie Zeng
- Hefei National
Laboratory
for Physical Sciences at the Microscale, CAS Centre for Excellence
and Synergetic Innovation Centre in Quantum Information and Quantum
Physics, Center of Advanced Nanocatalysis (CAN-USTC), Department of
Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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40
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Abstract
Prevention of myocardial injury has been considered as the most important therapeutic challenge of today. Fibrates, the agonists of the peroxisome proliferator-activated receptor (PPAR)-a receptor, have been regarded as potent therapeutic agents in this context. Hence, the present study has been designed to investigate the effect of fibrates, i.e., Clofibrate and Fenofibrate, the potent agonists PPAR-a, on ischemia-reperfusion (I/R)-induced myocardial injury. The isolated Langendorff-perfused rat hearts were subjected to global ischemia for 30 minutes followed by reperfusion for 120 minutes. Myocardial infarct size and the release of lactate dehydrogenase (LDH) and creatine kinase (CK) in coronary effluent have been conducted to assess the degree of cardiac injury. Moreover, the oxidative stress in the heart was assessed by measuring lipid peroxidation, superoxide anion generation, and reduced glutathione. Clofibrate and Fenofibrate showed cardioprotection against I/R-induced myocardial injury in rat hearts as assessed in terms of reductions in myocardial infarct size, LDH, and CK levels in coronary effluent along with reduction in I/R-induced oxidative stress. It may be concluded that the observed cardioprotective potential of Clofibrate and Fenofibrate against I/R-induced myocardial injury was due to the reductions in infarct size and oxidative stress.
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Affiliation(s)
- G S Sugga
- Department of Pharmacy (Pharmacology), NIMS University, Shobha Nagar, Jaipur, Rajasthan, India
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Abstract
The present study investigated the probable role of simvastatin, 3-hydroxymethyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitor, in abrogated cardioprotection in hyperhomocysteinemic (Hhcy) rat hearts. Isolated Langendorff's perfused normal and Hhcy rat hearts were subjected to 30-min global ischemia (I) followed by 120-min reperfusion (R). Assessment of myocardial damage was done by measuring infarct size and analyzing the release of lactate dehydrogenase (LDH) and creatine kinase (CK-MB) in coronary effluent. In addition, the oxidative stress in the heart was assessed by measuring lipid peroxidation and superoxide anion generation. I/R produced myocardial injury in normal and Hhcy rat hearts by increasing myocardial infarct size, LDH and CK in coronary effluent and oxidative stress. Hhcy rat hearts showed enhanced myocardial injury and high oxidative stress as compared to normal hearts. Treatment with Simvastatin (10 μMol) afforded cardioprotection against I/R-induced myocardial injury in normal and hyperhomocysteinemic rat hearts as assessed in terms of reductions in myocardial infarct size, LDH and CK levels in coronary effluent and oxidative stress. The reductions in the high degree of oxidative stress may be responsible for the observed cardioprotection afforded by simvastatin against I/R-induced myocardial injury in normal and hyperhomocysteinemic rat hearts.
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Affiliation(s)
- Ankur Rohilla
- Department of Pharmacy, NIMS University, Shobha Nagar, Jaipur, Rajasthan, India
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Collier JG, Jenkins JS, Keddie J, Khan MU, Robinson BF. Effect of angiotensin-converting enzyme inhibitor on response of plasma renin activity and aldosterone to tilting in man. Br J Clin Pharmacol 2012; 1:313-7. [PMID: 22454885 DOI: 10.1111/j.1365-2125.1974.tb00259.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
1 The effect of an angiotensin-converting enzyme inhibitor (SQ 20,881; 0.5 mg/kg) on the response to tilting of plasma renin activity (PRA), plasma aldosterone and cortisol was studied in five normal subjects. 2 PRA rose significantly in both the supine and upright positions following administration of SQ 20,881; no significant effect on aldosterone or cortisol was observed.
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Affiliation(s)
- J G Collier
- Department of Medicine, St George's Hospital, London
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Khan MU, Khan S, El-Refaie S, Win Z, Rubello D, Al-Nahhas A. Clinical indications for Gallium-68 positron emission tomography imaging. Eur J Surg Oncol 2009; 35:561-7. [PMID: 19201567 DOI: 10.1016/j.ejso.2009.01.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 01/12/2009] [Accepted: 01/14/2009] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND (68)Ga-PET imaging is showing slow but steady progress when compared to (18)F-FDG PET. The advantage of in-house preparation of (68)Ga without necessity of a cyclotron, and the new generator configuration with future possibility of freeze-dried kits would make it a promising PET agent for the future. METHODS An exhaustive literature exploration was performed using the search engines High-Wire Press, Pubmed, Embase and library databases. Recent reviews on the subject and up-to-date studies on the topic were found that described the role of (68)Ga-PET imaging. Clinical experiences, including our own are described. RESULTS Recent resurgence in development of peptides labelled with radiometals, for diagnostic and therapeutic purposes, resulted in a new beginning for (68)Ga-PET imaging. Pre-clinical experience employing animal models and investigation of tracer kinetics/tumour uptake measurements using dynamic (68)Ga-PET have provided data regarding identification of Somatostatin receptors subtypes on many tumours. Present published experiences including our own support these and highlight current clinical utility of (68)Ga-PET imaging. (68)Ga-DOTATOC and (68)Ga-DOTANOC are the most prominent radiopharmaceuticals used nowadays. CONCLUSION (68)Ga-PET is employed in the management of neuroendocrine tumours and neural crest tumours (phaeochromocytoma and paraganglioma) with diagnostic and therapeutic implications where it compliments present radiologic and scintigraphic procedures. Diagnosis and radiotherapy treatment planning for meningiomas in pertinent clinical setting is another potential use of (68)Ga-PET. Limited studies have shown its utility in prostate cancer but further studies are contemplated. Therefore, current experience tends to open a new horizon for the clinical utility of (68)Ga-PET imaging in future.
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Affiliation(s)
- M U Khan
- Department of Nuclear Medicine, Shaukat Khanum Memorial Cancer Hospital & Research Center, Lahore, Pakistan
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Khan MU, Morse M, Coleman RE. Radioiodinated metaiodobenzylguanidine in the diagnosis and therapy of carcinoid tumors. Q J Nucl Med Mol Imaging 2008; 52:441-454. [PMID: 19088697] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Carcinoid tumors account for less than 1% of all malignancies and the majority arises in the gastrointestinal system. These tumors are slow-growing compared with adenocarcinomas and they differ from the other neuroendocrine malignancies by their protean clinical presentation. Carcinoid tumors were previously considered indolent, but they can manifest malignant characteristics with metastatic spread which often results in a poor prognosis. Although there have been advances in diagnostic and treatment modalities, carcinoid tumors are still frequently diagnosed late, often when the tumor has metastasized and patients have developed carcinoid syndrome. Diagnosis, prognosis and treatment options are based on biochemical markers and imaging investigations. High concentration of urinary 5-HIAA, elevated plasma serotonin and chromogranin A levels help to establish the initial diagnosis of carcinoid tumors. In addition to the computed tomography and magnetic resonance imaging, molecular imaging modalities such as OctreoScan, metaiodobenzylguanidine (MIBG) imaging and more recently PET imaging are used in detecting the primary malignancy and metastatic involvement. Surgery is the mainstay of treatment of non-metastatic carcinoid tumors. Cytotoxic chemotherapy has limited role because of the chemoresistant nature of these tumors. Because carcinoid tumors express somatostatin receptors, somatostatin analogues, which inhibit release of serotonin and other neuroendocrine peptides, are often used, but their use is limited to symptom control. Treatment using high doses of radionuclides, such as radiolabeled somatostatin analogues and MIBG, is a more recent option, which offers a definite advantage in management. In this article, we review the current state of the art in the diagnosis and treatment of carcinoid tumors as well as the role of MIBG in their diagnosis and management.
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Affiliation(s)
- M U Khan
- Division of Nuclear Medicine, Department of Radiology, Duke University Medical Center, Durham, NC27710, USA.
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Ahmed A, Ali M, Khan EA, Khan MU. An audit of perioperative cardiac arrests in a Southeast Asian university teaching hospital over 15 years. Anaesth Intensive Care 2008; 36:710-6. [PMID: 18853592 DOI: 10.1177/0310057x0803600514] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
An audit of the incidence, causes and outcome of perioperative cardiac arrest was conducted in a university hospital in Pakistan. All perioperative cardiac arrests from induction of anaesthesia to post anaesthesia care unit discharge or intensive care unit admission during noncardiac surgery, from January 1992 to December 2006 were included. Patients' demographic information, physical status and type of surgery and anaesthesia were noted. Outcome variables were noted as immediate survival and survival to discharge. Anaesthesia-related cardiac arrests were identified and their causes analysed. Forty-two cardiac arrests occurred among 140,384 patients. Overall frequency was 2.99 per 10,000 (95% confidence interval: 2.90 to 3.08). Twenty-four (3.77/10,000) were females. Thirty-four (13.59/10,000) patients were ASA physical status III to V, 10 (4.95/10,000) were children and 14 (4.28/10,000) above 60 years. Sixteen patients (6.48/10,000) were undergoing emergency surgery. Anaesthesia was deemed primarily responsible in nine cases (0.64/10,000). The causes of anaesthesia-related arrests were medication related (4), airway related (3), massive air embolism (1) and under-replacement of fluids (1). The event was considered to be avoidable in 26 cases. Seventeen patients died during the arrest, 15 survived more than one hour and 10 were discharged home. The number of perioperative cardiac arrests and their mortality was higher in patients with poor physical status and in emergency surgery. The number was also higher in infants, patients above 60 and females. The majority of the cases were considered avoidable, indicating the importance of prevention strategies.
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Affiliation(s)
- A Ahmed
- Department ofAnaesthesia, Aga Khan University Hospital, Karachi, Pakistan
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Javed RA, Marrero K, Rafique M, Khan MU, Jamarai D, Vieira J. Life-threatening hyperkalaemia developing following excessive ingestion of orange juice in a patient with baseline normal renal function. Singapore Med J 2007; 48:e293-e295. [PMID: 17975680] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Hyperkalaemia is a less-recognised life-threatening cause of paralysis. We describe a 51-year-old African-American man, who suffered from muscle weakness progressing to ascending symmetric paralysis, and inability to masticate. Physical examination revealed flaccid paralysis with areflexia of the four limbs. Computed tomography of the brain and cervical spine did not demonstrate any organic lesions. Laboratory investigations revealed serum potassium 9.0 mEq/L (not haemolysed), blood urea nitrogen 34 mg/dL, and serum creatinine 2.0 mg/dL. Electrocardiography showed typical features of hyperkalaemia. After emergent treatment for hyperkalaemia was initiated, serum potassium was rapidly-normalised to 5 mEq/L and all neuromuscular symptoms reversed within one hour. Upon reviewing his food and medication history, he admitted drinking 2.5 litres of orange juice (which contains about 450 mg of potassium in 1,000 ml) per day for the past three weeks to quench his thirst. Hyperkalaemia should be borne in mind in the differential diagnosis of acute paralysis. Hidden sources of potassium intake, such as orange juice, should not be overlooked, even in patients with baseline normal renal function.
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Affiliation(s)
- R A Javed
- Department of Internal Medicine, Resident Internal Medicine, Long Island College Hospital, 339 Hicks Street, Brooklyn, New York, NY 11201, USA.
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Khan MU, Khan FA. Anaesthesia-related mortality in developing countries. Anaesth Intensive Care 2006; 34:523-4. [PMID: 16918000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
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Williams JP, Imperial V, Khan MU, Hodson JN. The role of phosphatidylcholine in fatty acid exchange and desaturation in Brassica napus L. leaves. Biochem J 2000; 349:127-33. [PMID: 10861220 PMCID: PMC1221129 DOI: 10.1042/0264-6021:3490127] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The role of phosphatidylcholine (PC) in fatty acid exchange and desaturation was examined and compared with that of monogalactosyldiacylglycerol (MGDG) in Brassica napus leaves using (14)C-labelling in vivo. Data are presented which indicate that in the chloroplast newly formed saturated (palmitic acid, 16:0) and monounsaturated (oleic acid, 18:1) fatty acid is incorporated into MGDG and desaturated in situ. In the non-plastidic compartments, however, newly formed fatty acid is exchanged with polyunsaturated fatty acid in PC, the probable major site of subsequent desaturation. The unsaturated fatty acid is released to the acyl-CoA pool, which is then used to synthesize diacylglycerol (DAG) containing a high level of unsaturated fatty acid. This highly unsaturated DAG may be the source for the biosynthesis of other cellular glycerolipids. The generally accepted pathway in which PC is synthesized from molecular species of DAG containing 16:0 and 18:1 followed by desaturation of the 18:1 to linoleic (18:2) and linolenic (18:3) acids is questioned.
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Affiliation(s)
- J P Williams
- Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2.
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Miśkiewicz E, Ivanov AG, Williams JP, Khan MU, Falk S, Huner NP. Photosynthetic acclimation of the filamentous cyanobacterium, Plectonema boryanum UTEX 485, to temperature and light. Plant Cell Physiol 2000; 41:767-775. [PMID: 10945347 DOI: 10.1093/pcp/41.6.767] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Photosynthetic acclimation to temperature and irradiance was studied in the filamentous, non-heterocystous cyanobacterium Plectonema boryanum UTEX 485. Growth rates of this cyanobacterium measured at ambient CO2 were primarily influenced by temperature with minimal effects of irradiance. Both growth temperature and irradiance affected linolenic (18:3) and linoleic acid (18:2) levels in the four major lipid classes in an independent but additive manner. In contrast, photosynthetic acclimation was not due to either growth temperature or irradiance per se, but rather, due to the interaction of these environmental factors. P. boryanum grown at low temperature and moderate irradiance mimicked cells grown at high light. Compared to cells grown at either 29 degrees C/150 micromol m(-2) s(-1) (29/150) or 15/10, P. boryanum grown at either 15/150 or 29/750 exhibited: (1) reduced cellular levels of Chl a and phycobilisomes (PBS), and concomitantly higher content of an orange-red carotenoid, myxoxanthophyll; (2) higher light saturated rates (Pmax) when expressed on a Chl a basis but lower apparent quantum yields of oxygen evolution and (3) enhanced resistance to high light stress. P. boryanum grown at 15/150 regained normal blue-green pigmentation within 16 h after a temperature shift to 29 degrees C at a constant irradiance of 150 micromol m(-2) s(-1). DBMIB and KCN but not DCMU and atrazine partially inhibited the change in myxoxanthophyll/Chl a ratio following the shift from 15 to 29 degrees C. We conclude that P. boryanum responds to either varying growth temperature or varying growth irradiance by adjusting the ability to absorb light through decreasing the cellular contents of Chl a and light-harvesting pigments and screening of excessive light by myxoxanthophyll predominantly localized in the cell wall/cell membrane to protect PSII from over-excitation. The possible role of redox sensing/signalling for photosynthetic acclimation of cyanobacteria to either temperature or irradiance is discussed.
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Affiliation(s)
- E Miśkiewicz
- Department of Plant Sciences, University of Western Ontario, London, Canada
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Abstract
Social factors influencing diarrhoea prevalence rates, in Saudi communities, were studied during 1991 taking statistically representative samples from the whole population. The factors included mother's age, child's age, birth order, parent's education, feeding pattern, and urban, rural, and regional residences. This study was a part of the National Maternal and Child Health Survey which involved interviewing of 6308 women with 8292 children under 5 years. The social factors and diarrhoea occurring in children during the preceding 14 days prior to the date of survey were inquired into and recorded in the pre-coded and field-tested questionnaire forms. There were 3.8 episodes of diarrhoea per year per child under 5 or 15 per cent per 2 weeks. This was higher than previously reported. The factors associated with higher prevalence rate were the children of youngest (15-19-years-old) mothers (28 per cent), the last children (18 per cent), and the children aged 6-17 months (24-31 per cent). Additionally, by birth order, the last (third) child on the average had highest rate (18 per cent) than the second (9 per cent) and the second had higher rate than the first (6 per cent) child. The rate in those who lived in rural setting was higher (15 per cent) than in those who lived in urban setting (14 per cent). The rates were almost identical between the areas of the country (13-17 per cent) except having higher rate in the northern area (17 per cent).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- Y Y al-Mazrou
- Ministry of Preventive Medicine, MOH, Riyadh, Saudi Arabia
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