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Verma N, Singh M, Bhati P, Khanna S, Ashraf MT, Kumari S, Chatterjee N, Deshwal VK, Rustagi S, Priya K. In Vitro and In Silico Studies on 4-Nitroacetophenone Thiosemicarbazone Potential Cytotoxicity Against A549 Cell Lines. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04814-1. [PMID: 38157154 DOI: 10.1007/s12010-023-04814-1] [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] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Lung malignancy is a major worldwide issue that occurs due to the dysregulation of various growth factors. Lung cancer has no apparent signs in the early stages, which makes it harder to catch it in time and leads to a higher fatality rate. So, the goal of this work was to create and analyze a novel chemical molecule called 4-nitro acetophenone thiosemicarbazone (4-NAPTSc) against the lung cancer cell line A549 and human non-tumorigenic lung epithelial cell line BAES-2B. The ligand was synthesized by refluxing the reaction mixture of 4-nitro acetophenone and thiosemicarbazide and was further characterized by UV, FTIR, and 1H and 13C NMR and Differential Scanning Calorimetry (DSC) study. Cytotoxicity assay/MTT (3-(4,5-dimethylthiazol-2-yl))2,5-diphenyltetrazolium bromide) was used to evaluate the cytotoxicity of the compound. Epidermal growth factor receptors (EGFR), polo-like kinase-1 (PLK1), and vascular endothelial growth factor receptors (VEGFR) were chosen as the target proteins for molecular docking to find potential ligand binding sites and inhibit their function. A novel yellow-colored crystalline solid has been synthesized. 4-NAPTSc had an IC50 of 2.93 μg/mL against the A549 lung cancer cells. When the dosage is increased from 5 to 15 μg/mL along with time, the cell viability falls. Docking results showed that the compound binds with the targeted proteins' amino acid residues, and the likeness profile of the compound is also favorable. This study reveals that the compound has the potential for further investigation and can be used in multitargeted cancer therapies.
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Affiliation(s)
- Neha Verma
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Knowledge park-III, Greater Noida, U.P., 201310, India
| | - Mohini Singh
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Knowledge park-III, Greater Noida, U.P., 201310, India
| | - Piyush Bhati
- School of Biotechnology, Gautam Buddha University, Greater Noida, U.P., 201312, India
| | - Sonia Khanna
- Department of Chemistry, School of Basic Sciences and Research, Sharda University, Knowledge park-III, Greater Noida, U.P., 201310, India
| | - Mohd Tashfeen Ashraf
- School of Biotechnology, Gautam Buddha University, Greater Noida, U.P., 201312, India
| | - Shilpa Kumari
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Knowledge park-III, Greater Noida, U.P., 201310, India
| | - Nidhi Chatterjee
- Department of Life Sciences, Guru Nanak College of Pharmaceutical Sciences, Dehradun, Uttarakhand, India
| | - Vishal K Deshwal
- Department of Life Sciences, Guru Nanak College of Pharmaceutical Sciences, Dehradun, Uttarakhand, India
| | - Sarvesh Rustagi
- School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Kanu Priya
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Knowledge park-III, Greater Noida, U.P., 201310, India.
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Khan AA, Ashraf MT, Aldakheel FM, Sayi Yazgan A, Zaidi R. Deciphering the involvement of iron targets in colorectal cancer: a network biology approach. Am J Transl Res 2022; 14:440-451. [PMID: 35173863 PMCID: PMC8829595] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Several studies suggested the role of heme iron, but not non-heme iron in colorectal cancer. A network and system biology-based approach was used to understand the role of heme and non-heme iron on colorectal cancer etiology. Heme and non-heme iron targets were screened in addition to CRC targets. The protein-protein interaction map of both iron targets was prepared with CRC targets. Moreover, functional enrichment analysis was performed in order to understand their role in cancer etiology. The heme iron is predicted to modulate several cancer-associated pathways. Our results indicate several targets and pathways, including IL-4/IL-13, ACE, and HIF-1 signaling, that may have an important role in heme iron-mediated CRC and must be given consideration for understanding their role in colorectal cancer.
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Affiliation(s)
- Abdul Arif Khan
- Division of Microbiology, Indian Council of Medical Research-National AIDS Research InstitutePune, Maharashtra 411026, India
| | - Mohd Tashfeen Ashraf
- School of Biotechnology, Gautam Buddha UniversityGautam Budh Nagar, Greater Noida, Uttar Pradesh 201308, India
| | - Fahad M Aldakheel
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Ayca Sayi Yazgan
- Department of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical UniversityMaslak, Istanbul 34469, Turkey
| | - Rana Zaidi
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia HamdardNew Delhi 110062, India
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Ejaz R, Ashraf MT, Qadeer S, Irfan M, Azam A, Butt S, Bibi S. Gender-based incidence, recovery period, and mortality rate of COVID-19 among the population of district Attock, Pakistan. BRAZ J BIOL 2021; 83:e249125. [PMID: 34669800 DOI: 10.1590/1519-6984.249125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/26/2021] [Indexed: 01/08/2023] Open
Abstract
COVID-19 is reported as an extremely contagious disease with common symptoms of fever, dry cough, sore throat, and tiredness. The published literature on incidence and gender-wise prevalence of COVID-19 is scarce in Pakistan. Therefore, the present study was designed to compare the distribution, incubation period and mortality rate of COVID-19 among the male and female population of district Attock. The data were collected between 01 April 2020 and 07 December 2020 from the population of district Attock, Pakistan. A total of 22,962 individuals were screened and 843 were found positive for RT-qPCR for SARS-CoV-2. The confirmed positive cases were monitored carefully. Among the positive cases, the incidence of COVID-19 was 61.7% among males and 38.2% among females. The average recovery period of males was 18.89±7.75 days and females were 19±8.40 days from SARS-CoV-2. The overall mortality rate was 8.06%. The death rate of male patients was significantly higher (P<0.05) compared to female patients. Also, the mortality rate was higher (P<0.05) in male patients of 40-60 years of age compared to female patients of the same age group. Moreover, the mortality rate significantly increased (P<0.05) with the increase of age irrespective of gender. In conclusion, the incidence and mortality rate of COVID-19 is higher in males compared to the female population. Moreover, irrespective of gender the mortality rate was significantly lower among patients aged <40 years.
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Affiliation(s)
- R Ejaz
- Shaheed Benazir Bhutto Women University, Department of Zoology, Peshawar, Pakistan
| | - M T Ashraf
- Health Services Academy, Islamabad, Pakistan
| | - S Qadeer
- University of Education, Division of Science and Technology, Department of Zoology, Lahore, Pakistan
| | - M Irfan
- Pir Mehr Ali Shah, Arid Agriculture University, Department of Zoology, Rawalpindi, Pakistan
| | - A Azam
- Shaheed Benazir Bhutto Women University, Department of Zoology, Peshawar, Pakistan
| | - S Butt
- Shaheed Benazir Bhutto Women University, Department of Microbiology, Peshawar, Pakistan
| | - S Bibi
- Pir Mehr Ali Shah, Arid Agriculture University, Department of Zoology, Rawalpindi, Pakistan
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Khan AA, Singh H, Bilal M, Ashraf MT. Microbiota, probiotics and respiratory infections: the three musketeers can tip off potential management of COVID-19. Am J Transl Res 2021; 13:10977-10993. [PMID: 34786037 PMCID: PMC8581851] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
Rapid infectivity of SARS-CoV2 with recent viral variants is posing a challenge in the development of robust therapeutic strategies. On the other hand, microbiota is debated for its involvement in SARS-CoV2 infection with varied opinions. Although ample data about the role of microbiota and probiotics in respiratory viral infections are available, their role in COVID-19 is limited albeit emerging rapidly. The utilization of probiotics for the management of COVID-19 is still under investigation in many clinical trials. Existing information coupled with recent COVID-19 related studies can suggest various ways to use microbiota modulation and probiotics for managing this pandemic. Present article indicates the role of microbiota modulation and probiotics in respiratory infections. In addition, scattered evidence was gathered to understand the potential of microbiota and probiotics in the management of SARS-CoV2. Gut-airway microbiota connection is already apparent in respiratory tract viral infections, including SARS-CoV2. Though few clinical trials are evaluating microbiota and probiotics for COVID-19 management, the safety evaluation must be given more serious consideration because of the possibility of opportunistic infections among COVID-19 patients. Nevertheless, the information about microbiota modulation using probiotics and prebiotics can be helpful to manage this outbreak and this review presents different aspects of this idea.
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Affiliation(s)
- Abdul Arif Khan
- Division of Microbiology, Indian Council of Medical Research-National AIDS Research InstitutePune, Maharashtra 411026, India
| | - HariOm Singh
- Division of Molecular Biology, Indian Council of Medical Research-National AIDS Research InstitutePune, Maharashtra 411026, India
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of TechnologyHuaian 223003, China
| | - Mohd Tashfeen Ashraf
- School of Biotechnology, Gautam Buddha UniversityGautam Budh Nagar, Greater Noida (UP), India
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Khan AA, A Abuderman A, Ashraf MT, Khan Z. Protein-protein interactions of HPV- Chlamydia trachomatis-human and their potential in cervical cancer. Future Microbiol 2020; 15:509-520. [PMID: 32476479 DOI: 10.2217/fmb-2019-0242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Aim: HPV is an important cause of cervical cancer, but Chlamydia trachomatis (CT) is suspiciously involved in this disease ranging from direct to its involvement as a cofactor with HPV. We performed this study to understand the interaction of HPV and C. trachomatis with humans and its contribution to cervical cancer. Materials & methods: Host-pathogen and pathogen-pathogen protein-protein interaction maps of HPV/CT/human were prepared and compared to analyze interactions during single/coinfection of C. trachomatis and HPV. The interacting human proteins were detected by their involvement in cervical cancer. Results: C. trachomatis may interact with several cancer associated proteins while HPV and C. trachomatis largely interact with different human proteins, suggesting different pathogenesis. Conclusion: C. trachomatis coinfection with HPV may modulate cervical cancer development.
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Affiliation(s)
- Abdul Arif Khan
- Department of Pharmaceutics, College of Pharmacy, PO Box 2457, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Abdulwahab A Abuderman
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia
| | - Mohd Tashfeen Ashraf
- School of Biotechnology, Gautam Buddha University, Gautam Budh Nagar, Greater Noida, Uttar Pradesh, 201312, India
| | - Zakir Khan
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Baverly Blvd., Los Angeles, CA 90048, USA
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Khan AA, Khan Z, Malik A, Kalam MA, Cash P, Ashraf MT, Alshamsan A. Colorectal cancer-inflammatory bowel disease nexus and felony of Escherichia coli. Life Sci 2017; 180:60-67. [PMID: 28506682 DOI: 10.1016/j.lfs.2017.05.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [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: 01/29/2017] [Revised: 04/24/2017] [Accepted: 05/12/2017] [Indexed: 12/19/2022]
Abstract
Colorectal cancer (CRC) has a multifactorial etiology. Although the exact cause of CRC is still elusive, recent studies have indicated microbial involvement in its etiology. Escherichia coli has emerged as an important factor in CRC development since the bacterium can cause changes in the gut that lead to cancerous transformation. A number of studies indicate that chronic inflammation induced by microorganisms, including E. coli, during inflammatory bowel disease (IBD) predisposes an individual to CRC. The evidence that support the role of E. coli in the etiology of CRC, through IBD, is not limited only to chronic inflammation. The growth of E. coli as an intracellular pathogen during IBD and CRC enable the bacteria to modulate the host cell cycle, induce DNA damage and accumulate mutations. These are some of the contributing factors behind the etiology of CRC. The present article considers the current status of the involvement of E. coli, through IBD, in the etiology of CRC. We discuss how intracellular E. coli infection can cause changes in the gut that can eventually lead to cellular transformation. In addition, the recent management strategies that target E. coli for prevention of CRC are also discussed.
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Affiliation(s)
- Abdul Arif Khan
- Nanomedicine Research Unit, Department of Pharmaceutics, College of Pharmacy, PO Box 2457, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Zakir Khan
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Baverly Blvd., Los Angeles, CA 90048, USA
| | - Abdul Malik
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohd Abul Kalam
- Nanomedicine Research Unit, Department of Pharmaceutics, College of Pharmacy, PO Box 2457, King Saud University, Riyadh 11451, Saudi Arabia
| | - Phillip Cash
- The Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | | | - Aws Alshamsan
- Nanomedicine Research Unit, Department of Pharmaceutics, College of Pharmacy, PO Box 2457, King Saud University, Riyadh 11451, Saudi Arabia; King Abdullah Institute for Nanotechnology, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
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Rabbani G, Ahmad E, Khan MV, Ashraf MT, Bhat R, Khan RH. Impact of structural stability of cold adapted Candida antarctica lipase B (CaLB): in relation to pH, chemical and thermal denaturation. RSC Adv 2015. [DOI: 10.1039/c4ra17093h] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [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] Open
Abstract
The effect of pH on the conformational behavior of Candida antartica lipase B (CaLB) has been monitored by spectroscopic and calorimetric studies.
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Affiliation(s)
- Gulam Rabbani
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202 002
- India
| | - Ejaz Ahmad
- Central European Institute of Technology (CEITEC), Masaryk University
- CZ-62500 Brno
- Czech Republic
| | - Mohsin Vahid Khan
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202 002
- India
| | | | - Rajiv Bhat
- School of Biotechnology
- Jawaharlal Nehru University
- New-Delhi 110067
- India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit
- Aligarh Muslim University
- Aligarh-202 002
- India
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Ahmad E, Rabbani G, Zaidi N, Singh S, Rehan M, Khan MM, Rahman SK, Quadri Z, Shadab M, Ashraf MT, Subbarao N, Bhat R, Khan RH. Stereo-selectivity of human serum albumin to enantiomeric and isoelectronic pollutants dissected by spectroscopy, calorimetry and bioinformatics. PLoS One 2011; 6:e26186. [PMID: 22073150 PMCID: PMC3206814 DOI: 10.1371/journal.pone.0026186] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 09/22/2011] [Indexed: 11/19/2022] Open
Abstract
1-naphthol (1N), 2-naphthol (2N) and 8-quinolinol (8H) are general water pollutants. 1N and 2N are the configurational enantiomers and 8H is isoelectronic to 1N and 2N. These pollutants when ingested are transported in the blood by proteins like human serum albumin (HSA). Binding of these pollutants to HSA has been explored to elucidate the specific selectivity of molecular recognition by this multiligand binding protein. The association constants (K(b)) of these pollutants to HSA were moderate (10(4)-10(5) M(-1)). The proximity of the ligands to HSA is also revealed by their average binding distance, r, which is estimated to be in the range of 4.39-5.37 nm. The binding free energy (ΔG) in each case remains effectively the same for each site because of enthalpy-entropy compensation (EEC). The difference observed between ΔC(p) (exp) and ΔC(p) (calc) are suggested to be caused by binding-induced flexibility changes in the HSA. Efforts are also made to elaborate the differences observed in binding isotherms obtained through multiple approaches of calorimetry, spectroscopy and bioinformatics. We suggest that difference in dissociation constants of pollutants by calorimetry, spectroscopic and computational approaches could correspond to occurrence of different set of populations of pollutants having different molecular characteristics in ground state and excited state. Furthermore, our observation of enhanced binding of pollutants (2N and 8H) in the presence of hemin signifies that ligands like hemin may enhance the storage period of these pollutants in blood that may even facilitate the ill effects of these pollutants.
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Affiliation(s)
- Ejaz Ahmad
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Gulam Rabbani
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Saurabh Singh
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Mohd Rehan
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Mohd Moin Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | | | - Zainuddin Quadri
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Mohd. Shadab
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | | | - Naidu Subbarao
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Rajiv Bhat
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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Naeem A, Ahmad E, Ashraf MT, Khan RH. Purification and characterization of mannose/glucose-specific lectin from seeds of Trigonella foenumgraecum. Biochemistry (Mosc) 2007; 72:44-8. [PMID: 17309436 DOI: 10.1134/s0006297907010051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A lectin present in seeds of Trigonella foenumgraecum was isolated and purified by acid precipitation, salt fractionation, and affinity chromatography on mannan cross-linked agarose. SDS-PAGE revealed a single band corresponding to a molecular weight of 27,350 daltons. The lectin agglutinated trypsin-treated rat erythrocytes. Sugar specificity as determined by hemagglutination inhibition assay indicated that the lectin belongs to a glucose/mannose-specific group. The reaction of the lectin with glycoprotein was affected by pH changes. The carbohydrate binding specificity of the lectin was investigated by turbidity and activity measurements. As the lectin belongs to the Leguminoceae family, the specificity of the lectin for glucose/mannose renders it a valuable tool for Rhizobium-legume symbiosis.
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Affiliation(s)
- Aabgeena Naeem
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
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Naeem A, Ashraf MT, Akram M, Khan RH. Comparative study of effects of polyols, salts, and alcohols on trichloroacetic acid-induced state of cytochrome c. Biochemistry (Moscow) 2006; 71:1101-9. [PMID: 17125458 DOI: 10.1134/s0006297906100075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A systematic investigation of the effect of polyethylene glycols, salts, and alcohols on the trichloroacetic acid (TCA)-induced state of ferricytochrome c was made using various spectroscopic techniques. Native cytochrome c (Cyt c) has a fluorescence maximum at 335 nm, whereas the TCA-induced state of Cyt c has a red shift of 7 nm with enhanced fluorescence intensity. The near- and far-UV CD spectra showed a significant loss of tertiary and secondary structure, although the protein is relatively less unfolded as compared with a conformation at pH 2.0. Addition of 70% (v/v) polyols to TCA (3.3 mM)-induced state of Cyt c resulted in increased 1-anilino-8-naphthalene sulfonate binding and increased mean residue ellipticity at 222 nm, indicating increase in compactness with enhanced exposure of hydrophobic surface area. Also, the stabilizing effect of salts and alcohols on the TCA-induced state was studied and compared with their effect on trifluoroacetic acid-unfolded state of Cyt c. Among all the polyols, salts, and alcohols studied, PEG-400, K3[Fe(CN)6], and butanol were the most efficient in inducing secondary structure in TCA-induced state as examined by the above-mentioned spectroscopic techniques. For salts, the efficiency in inducing the secondary structure followed the order K3[Fe(CN)6] > KClO4 > K2SO4 > KCl. For alcohols, this order was found to be as follows: butanol > propanol > ethanol > methanol.
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Affiliation(s)
- Aabgeena Naeem
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
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Kaur M, Singh K, Rup PJ, Saxena AK, Khan RH, Ashraf MT, Kamboj SS, Singh J. A tuber lectin from Arisaema helleborifolium Schott with anti-insect activity against melon fruit fly, Bactrocera cucurbitae (Coquillett) and anti-cancer effect on human cancer cell lines. Arch Biochem Biophys 2006; 445:156-65. [PMID: 16321359 DOI: 10.1016/j.abb.2005.10.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [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: 08/27/2005] [Revised: 10/22/2005] [Accepted: 10/26/2005] [Indexed: 11/22/2022]
Abstract
An anti-insect and anti-cancer lectin has been isolated from Arisaema helleborifolium Schott by affinity chromatography using asialofetuin-linked amino activated silica beads. The bound A. helleborifolium lectin (AHL) was eluted with 100mM glycine-HCl buffer, pH 2.5. It gave a single band on SDS-PAGE, pH 8.3, and PAGE, pH 4.5. However, multiple bands were obtained in PAGE at pH 8.3 and isoelectric focusing. The lectin was a homotetramer having subunit molecular mass 13.4kDa while its native molecular mass was 52kDa. It was a glycoprotein with 3.40% carbohydrate and was stable up to 60 degrees C for 30min. It showed anti-insect activity towards second instar larvae of Bactrocera cucurbitae (Coquillett) with LC(50) value of 16.4microg/ml. Larvae fed on artificial diet containing sub-lethal dose of AHL showed a significant decrease in acid phosphatase and alkaline phosphatase activity while esterase activity markedly increased as compared to larvae fed on diet without lectin. AHL was also found to inhibit in vitro proliferation of some well established human cancer cell lines viz HOP-62 (95%), HCT-15 (92%), HEP-2 (66%), HT-29 (68%), PC-3 (39.4%), and A-549 (20.7%).
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Affiliation(s)
- Manpreet Kaur
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143 005, India
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Naseem F, Ahmad B, Ashraf MT, Khan RH. Molten globule-like folding intermediate of asialofetuin at acidic pH. Biochim Biophys Acta 2004; 1699:191-9. [PMID: 15158727 DOI: 10.1016/j.bbapap.2004.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Revised: 02/24/2004] [Accepted: 02/25/2004] [Indexed: 11/18/2022]
Abstract
In our earlier communication on acid-induced unfolding of bovine serum fetuin (BSF), we showed the existence of a molten globule (MG)-like state of BSF at pH 1.8. The MG state was characterized by higher content of secondary structure than native and almost complete loss of tertiary structure and more solvent exposed hydrophobic surface [Biochim. Biophys. Acta 1649 (2003) 164]. In this work we have shown the presence of an MG-like partially folded intermediate of asialofetuin at around pH 1.8, which is much different from the MG state observed in BSF in secondary structure contents. The results show that asialofetuin at pH 1.8 retains approximately 45% secondary structure, as evident from far-UV CD spectra. The near-UV CD spectra showed almost complete loss of tertiary structure. The intrinsic fluorescence and acrylamide quenching of the lone tryptophan residue showed that in acid-induced state, it is buried in the interior in a nonpolar environment. The temperature dependence of far-UV CD signal of asialofetuin at pH 1.8 exhibits a weak cooperative thermal transition. A significant increase in ANS fluorescence showed extensive solvent exposure of nonpolar cluster. Size exclusion chromatography (SEC) indicates a slight increase in the hydrodynamic size of acid-induced protein. These results suggest that asialofetuin at pH 1.8 represents the MG-like folding intermediate. Moreover, our results showed that glycosylation might play a role in stabilization of secondary structure during acid and/or thermal denaturation.
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Affiliation(s)
- Farah Naseem
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
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Ashraf MT, Khan RH. Mitogenic lectins. Med Sci Monit 2003; 9:RA265-9. [PMID: 14586291] [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: 04/27/2023] Open
Abstract
Lectins have captured the attention of a large number of researchers on account of the various exploitable activities that they exhibit, including their proliferative effects on various cell types. Recognition of cell-surface carbohydrates by lectins has broad implications in important biological processes. The ability of lectins to detect subtle variations in carbohydrate structures on the surface of cells and tissues has made them a paradigm for protein-carbohydrate recognition. Lectins display a considerable repertoire of carbohydrate specificities. These characteristics, together with the ability to stimulate lymphocytes as well as other cells, have made lectins an important diagnostic and experimental tool to study the various aspects of cell growth and differentiation, taking lymphocytes as the cell type. Various models of lectin action have been used to explain specific event-driven functions of lectins, which have convincingly elucidated the mechanism of action of lectins in different milieu. This review contains a selective survey of information available on the role of lectins in cell proliferation, with special emphasis on lymphocyte proliferation and the models which have been proposed to elucidate lectin action. The information available clearly justifies the observation that a generalized scheme to explain the diverse roles played by lectins in cell growth and differentiation is still awaited.
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Affiliation(s)
- Mohd Tashfeen Ashraf
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh-202 002, India
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