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Zhang Y, Sun Q, Mustieles V, Martin L, Sun Y, Bibi Z, Torres N, Coburn-Sanderson A, First O, Souter I, Petrozza JC, Botelho JC, Calafat AM, Wang YX, Messerlian C. Predictors of Serum Per- and Polyfluoroalkyl Substances Concentrations among U.S. Couples Attending a Fertility Clinic. Environ Sci Technol 2024; 58:5685-5694. [PMID: 38502775 DOI: 10.1021/acs.est.3c08457] [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] [Indexed: 03/21/2024]
Abstract
Previous studies have examined the predictors of PFAS concentrations among pregnant women and children. However, no study has explored the predictors of preconception PFAS concentrations among couples in the United States. This study included 572 females and 279 males (249 couples) who attended a U.S. fertility clinic between 2005 and 2019. Questionnaire information on demographics, reproductive history, and lifestyles and serum samples quantified for PFAS concentrations were collected at study enrollment. We examined the PFAS distribution and correlation within couples. We used Ridge regressions to predict the serum concentration of each PFAS in females and males using data of (1) socio-demographic and reproductive history, (2) diet, (3) behavioral factors, and (4) all factors included in (1) to (3) after accounting for temporal exposure trends. We used general linear models for univariate association of each factor with the PFAS concentration. We found moderate to high correlations for PFAS concentrations within couples. Among all examined factors, diet explained more of the variation in PFAS concentrations (1-48%), while behavioral factors explained the least (0-4%). Individuals reporting White race, with a higher body mass index, and nulliparous women had higher PFAS concentrations than others. Fish and shellfish consumption was positively associated with PFAS concentrations among both females and males, while intake of beans (females), peas (male), kale (females), and tortilla (both) was inversely associated with PFAS concentrations. Our findings provide important data for identifying sources of couples' PFAS exposure and informing interventions to reduce PFAS exposure in the preconception period.
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Affiliation(s)
- Yu Zhang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Qi Sun
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, United States
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Vicente Mustieles
- Instituto de Investigación Biosanitaria Ibs GRANADA, Granada 18012, Spain
- University of Granada, Center for Biomedical Research (CIBM), Spain. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid 28029, Spain
| | - Leah Martin
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Yang Sun
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Zainab Bibi
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Nicole Torres
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Ayanna Coburn-Sanderson
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Olivia First
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Irene Souter
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, Massachusetts 02113, United States
| | - John C Petrozza
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, Massachusetts 02113, United States
| | - Julianne C Botelho
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, United States
| | - Antonia M Calafat
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, United States
| | - Yi-Xin Wang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
| | - Carmen Messerlian
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, United States
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, Massachusetts 02113, United States
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2
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Zhang Y, Mustieles V, Korevaar T, Martin L, Sun Y, Bibi Z, Torres N, Coburn-Sanderson A, First O, Souter I, Petrozza JC, Broeren MAC, Botelho JC, Calafat AM, Wang YX, Messerlian C. Association between per- and polyfluoroalkyl substances exposure and thyroid function biomarkers among females attending a fertility clinic. Environ Pollut 2024; 346:123513. [PMID: 38350534 PMCID: PMC10950513 DOI: 10.1016/j.envpol.2024.123513] [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: 10/13/2023] [Revised: 01/15/2024] [Accepted: 02/04/2024] [Indexed: 02/15/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) exposure was associated with changes in thyroid function in pregnant mothers and the general population. Limited such evidence exists in other susceptible populations such as females with fertility problems. This cross-sectional study included 287 females seeking medically assisted reproduction at a fertility clinic in Massachusetts, United States, between 2005 and 2019. Six long-alkyl chain PFAS, thyroid hormones, and autoimmune antibodies were quantified in baseline serum samples. We used generalized linear models and quantile g-computation to evaluate associations of individual PFAS and their total mixture with thyroid biomarkers. Most females were White individuals (82.7%), had graduate degrees (57.8%), and nearly half had unexplained subfertility (45.9%). Serum concentrations of all examined PFAS and their mixture were significantly associated with 2.6%-5.6% lower total triiodothyronine (TT3) concentrations. Serum concentrations of perfluorononanoate (PFNA), perfluorodecanoate (PFDA), and perfluoroundecanoate (PFUnDA), and of the total mixture were associated with higher ratios of free thyroxine (FT4) to free triiodothyronine (FT3). No associations were found for PFAS and TSH or autoimmune antibodies. Our findings support the thyroid-disrupting effect of long alkyl-chain PFAS among a vulnerable population of subfertile females.
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Affiliation(s)
- Yu Zhang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Vicente Mustieles
- Instituto de Investigación Biosanitaria Ibs GRANADA, Spain. University of Granada, Center for Biomedical Research (CIBM), Spain. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Spain
| | - T.I.M. Korevaar
- Department of Internal Medicine and Academic Center for Thyroid Diseases, Erasmus University Medical Center, 3015 GE Rotterdam, The Netherlands
| | - Leah Martin
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Yang Sun
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Zainab Bibi
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Nicole Torres
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Ayanna Coburn-Sanderson
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Olivia First
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Irene Souter
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
| | - John C. Petrozza
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
| | - Maarten A. C. Broeren
- Laboratory of Clinical Chemistry and Haematology, Máxima Medical Centre, Veldhoven, The Netherlands
| | - Julianne C. Botelho
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Antonia M. Calafat
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Yi-Xin Wang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Carmen Messerlian
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Zhang Y, Mustieles V, Martin L, Sun Y, Hillcoat A, Fang X, Bibi Z, Torres N, Coburn-Sanderson A, First O, Irene S, Petrozza JC, Botelho JC, Calafat AM, Wang YX, Messerlian C. Maternal and Paternal Preconception Serum Concentrations of Per and Polyfluoroalkyl Substances in Relation to Birth Outcomes. Environ Sci Technol 2024; 58:2683-2692. [PMID: 38290209 PMCID: PMC10924800 DOI: 10.1021/acs.est.3c07954] [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] [Indexed: 02/01/2024]
Abstract
Prenatal per and polyfluoroalkyl substances (PFAS) exposure is associated with adverse birth outcomes. There is an absence of evidence on the relationship between maternal and paternal preconception PFAS exposure and birth outcomes. This study included 312 mothers and 145 fathers with a singleton live birth from a preconception cohort of subfertile couples seeking fertility treatment at a U.S. clinic. PFAS were quantified in serum samples collected before conception. Gestational age (GA) and birthweight (BW) were abstracted from delivery records. We also assessed low birthweight (BW < 2500 g) and preterm birth (GA < 37 completed weeks). We utilized multivariable linear regression, logistic regression, and quantile-based g computation to examine maternal or paternal serum concentrations of individual PFAS and mixture with birth outcomes. Maternal serum concentrations of perfluorooctanesulfonate (PFOS), perfluorohexanesulfonate (PFHxS), and the total PFAS mixture were inversely associated with birthweight. Maternal PFOS concentration was associated with a higher risk of low birthweight. Conversely, paternal PFOS and PFHxS concentrations were imprecisely associated with higher birthweight. No associations were found for gestational age or preterm birth. The findings have important implications for preconception care. Future research with larger sample sizes would assist in validating these findings.
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Affiliation(s)
- Yu Zhang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Vicente Mustieles
- University of Granada, Center for Biomedical Research (CIBM), Spain. Instituto de Investigación Biosanitaria Ibs GRANADA, Spain. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Spain
| | - Leah Martin
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Yang Sun
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Alexandra Hillcoat
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Xin Fang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Zainab Bibi
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Nicole Torres
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Ayanna Coburn-Sanderson
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Olivia First
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Souter Irene
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
| | - John C. Petrozza
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
| | - Julianne C. Botelho
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Antonia M. Calafat
- National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Yi-Xin Wang
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Carmen Messerlian
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center, Boston, MA, USA
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Rauf S, Shah S, Bibi Z, Munir R, Jiskani H, Ahmad S, Mir Shah SA, Bibi A, Fasih Ahmad H, Hussain K, Ariff S, Ambreen G. Association of Caffeine Daily Dose With Respiratory Outcomes in Preterm Neonates: A Retrospective Cohort Study. Inquiry 2024; 61:469580241248098. [PMID: 38666733 PMCID: PMC11055476 DOI: 10.1177/00469580241248098] [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] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 04/01/2024] [Accepted: 04/02/2024] [Indexed: 04/29/2024]
Abstract
Apnea and poor respiratory drive increase the risk of extubation failure (EF) and prolonged invasive mechanical ventilation (IMV) in preterm neonates (pre-nates) with respiratory distress. Caffeine citrate (CC) is often prescribed for pre-nates in doses of 5-10 mg/kg in 24 h. This study aimed to evaluate the most effective dosage regimen (5 mg/kg/day vs >5-10 mg/kg/day) to prevent apnea and EF with minimal caffeine-associated potential side effects (CC-APSEs) in pre-nates. This one-year retrospective cohort study included all the eligible neonates admitted to NICU and received CC-therapy till 28 days of life (DOL) or discharge. Based on CC-daily dose formed LD-caffeine-group (5 mg/kg/day) and HD-caffeine-group (>5-10 mg/kg/day). Antenatal, prenatal, and postnatal characteristics, CC-regimen, comorbidities, and CC-APSEs were compared between the groups. Predictors of apnea and EF were analyzed through logistic regression. There were 181 and 72 neonates in the LD and HD-caffeine-groups respectively. In HD-caffeine-group daily CC-dose was 7 to 7.5 mg/kg/day in 93% of neonates and >7.5 to 10 mg/kg/day in only 7%. Significantly fewer neonates experienced apnea and EF in the HD-caffeine-group till 28DOL or discharge. This difference was even greater in the subgroup of ≤28 weeks GA (15.6% vs 40.0%; P < .01). In HD-caffeine-group the incidence of severe/moderate-BPD was significantly lower and the frequency of CC-APSEs was higher. Multivariate analysis showed that; the smaller the GA higher the risk of apnea (AOR = 0.510, 95% CI 0.483-0.999) and EF (AOR = 0.787, 95% CI 0.411-0.997). The HD-caffeine was inversely associated with developing apnea (AOR = 0.244, 95% CI 0.053-0.291) and EF (AOR = 0.103, 95% CI 0.098-2.976). IMV-duration before extubation (AOR = 2.229, 95% CI 1.672-2.498) and severe/moderate-BPD (AOR = 2.410, 95%CI 1.104-2.952) had a high risk of EF. Initiating early HD-caffeine may prevent apnea and extubation failure in preterm neonates. Optimization of caffeine initiation time and dosages can be a safe and feasible approach to decrease the burden of neonatal respiratory morbidities.
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Affiliation(s)
| | - Samar Shah
- Naseer Teaching Hospital PESHAWAR, Peshawar, Pakistan
| | - Zainab Bibi
- Aga Khan University Hospital, Karachi, Pakistan
| | | | | | - Saeed Ahmad
- Aga Khan University Hospital, Karachi, Pakistan
| | | | - Aysha Bibi
- Dow University of Health Sciences, Karachi, Pakistan
| | | | | | | | - Gul Ambreen
- Aga Khan University Hospital, Karachi, Pakistan
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Pan Q, Wu Y, Zheng A, Wang X, Li X, Wang W, Gao M, Bibi Z, Chaudhary S, Sun Y. Mechanochemical Synthesis of PdO 2 Nanoparticles Immobilized over Silica Gel for Catalytic Suzuki-Miyaura Cross-Coupling Reactions Leading to the C-3 Modification of 1 H-Indazole with Phenylboronic Acids. Molecules 2023; 28:7190. [PMID: 37894668 PMCID: PMC10609228 DOI: 10.3390/molecules28207190] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/15/2023] [Accepted: 10/15/2023] [Indexed: 10/29/2023] Open
Abstract
The C-3 modification of 1H-indazole has produced active pharmaceuticals for the treatment of cancer and HIV. But, so far, this transformation has seemed less available, due to the lack of efficient C-C bond formation at the less reactive C-3 position. In this work, a series of silica gel-supported PdO2 nanoparticles of 25-66 nm size were prepared by ball milling silica gel with divalent palladium precursors, and then employed as catalysts for the Suzuki-Miyaura cross-coupling of 1H-indazole derivative with phenylboronic acid. All the synthesized catalysts showed much higher cross-coupling yields than their palladium precursors, and could also be reused three times without losing high activity and selectivity in a toluene/water/ethanol mixed solvent. Although the palladium precursors showed an order of activity of PdCl2(dppf, 1,1'-bis(diphenylphosphino)ferrocene) > PdCl2(dtbpf, 1,1'-bis(di-tert-butylphosphino)ferrocene) > Pd(OAc, acetate)2, the synthesized catalysts showed an order of C1 (from Pd(OAc)2) > C3 (from PdCl2(dtbpf)) > C2 (from PdCl2(dppf)), which conformed to the orders of BET (Brunauer-Emmett-Teller) surface areas and acidities of these catalysts. Notably, the most inexpensive Pd(OAc)2 can be used as a palladium precursor for the synthesis of the best catalyst through simple ball milling. This work provides a highly active and inexpensive series of catalysts for C-3 modification of 1H-indazole, which are significant for the large-scale production of 1H-indazole-based pharmaceuticals.
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Affiliation(s)
- Qin Pan
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Yong Wu
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Aqun Zheng
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
| | - Xiangdong Wang
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Xiaoyong Li
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Wanqin Wang
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Min Gao
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
| | - Zainab Bibi
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
| | - Sidra Chaudhary
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
| | - Yang Sun
- Department of Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
- Xi’an Biomass Green Catalysis and Advanced Valorization International Science and Technology Cooperation Base, No. 28 Xianning West Road, Xi’an 710049, China
- Xixian New District Xingyi Advanced Materials Technology Co., Ltd., Room 1046, 1st Floor, Hongdelou Building No. 20, Science and Technology Innovation Port, Xi’an 712000, China
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Bibi Z, Asghar I, Ashraf NM, Zeb I, Rashid U, Hamid A, Ali MK, Hatamleh AA, Al-Dosary MA, Ahmad R, Ali M. Prediction of Phytochemicals for Their Potential to Inhibit New Delhi Metallo β-Lactamase (NDM-1). Pharmaceuticals (Basel) 2023; 16:1404. [PMID: 37895875 PMCID: PMC10610165 DOI: 10.3390/ph16101404] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/18/2023] [Accepted: 09/21/2023] [Indexed: 10/29/2023] Open
Abstract
The effectiveness of all antibiotics in the β-lactam group to cure bacterial infections has been impaired by the introduction of the New Delhi Metallo-β-lactamase (NDM-1) enzyme. Attempts have been made to discover a potent chemical as an inhibitor to this enzyme in order to restore the efficacy of antibiotics. However, it has been a challenging task to develop broad-spectrum inhibitors of metallo-β-lactamases. Lack of sequence homology across metallo-β-lactamases (MBLs), the rapidly evolving active site of the enzyme, and structural similarities between human enzymes and metallo-β-lactamases, are the primary causes for the difficulty in the development of these inhibitors. Therefore, it is imperative to concentrate on the discovery of an effective NDM-1 inhibitor. This study used various in silico approaches, including molecular docking and molecular dynamics simulations, to investigate the potential of phytochemicals to inhibit the NDM-1 enzyme. For this purpose, a library of about 59,000 phytochemicals was created from the literature and other databases, including FoodB, IMPPAT, and Phenol-Explorer. A physiochemical and pharmacokinetics analysis was performed to determine possible toxicity and mutagenicity of the ligands. Following the virtual screening, phytochemicals were assessed for their binding with NDM-1using docking scores, RMSD values, and other critical parameters. The docking score was determined by selecting the best conformation of the protein-ligand complex. Three phytochemicals, i.e., butein (polyphenol), monodemethylcurcumin (polyphenol), and rosmarinic acid (polyphenol) were identified as result of pharmacokinetics and molecular docking studies. Furthermore, molecular dynamics simulations were performed to determine structural stabilities of the protein-ligand complexes. Monodemethylcurcumin, butein, and rosmarinic acid were identified as potential inhibitors of NDM-1 based on their low RMSD, RMSF, hydrogen bond count, average Coulomb-Schrödinger interaction energy, and Lennard-Jones-Schrödinger interaction energy. The present investigation suggested that these phytochemicals might be promising candidates for future NDM-1 medication development to respond to antibiotic resistance.
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Affiliation(s)
- Zainab Bibi
- Department of Biotechnology, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan (R.A.)
| | - Irfa Asghar
- Department of Biotechnology, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan (R.A.)
| | - Naeem Mahmood Ashraf
- School of Biochemistry and Biotechnology, University of Punjab, Lahore P.O. Box 54590, Pakistan;
| | - Iftikhar Zeb
- Department of Biotechnology, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan (R.A.)
| | - Umer Rashid
- Department of Chemistry, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan;
| | - Arslan Hamid
- LIMES Institute, University of Bonn, D-53113 Bonn, Germany;
| | - Maria Kanwal Ali
- Institute of Nuclear Medicine, Oncology and Radiotherapy (INOR), Abbottabad 22060, Pakistan;
| | - Ashraf Atef Hatamleh
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (A.A.H.); (M.A.A.-D.)
| | - Munirah Abdullah Al-Dosary
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (A.A.H.); (M.A.A.-D.)
| | - Raza Ahmad
- Department of Biotechnology, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan (R.A.)
| | - Muhammad Ali
- Department of Biotechnology, Abbottabad Campus, COMSATS University Islamabad, Abbottabad 22060, Pakistan (R.A.)
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Bibi Z, Safdar M, Khan R. Nutritional Risk Assessment Of Critically Ill Patients Based On NUTRIC Score At Shifa International Hospital, Islamabad. J PAK MED ASSOC 2023; 73:1622-1627. [PMID: 37697752 DOI: 10.47391/jpma.7219] [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] [Indexed: 09/13/2023]
Abstract
Objectives To assess the nutritional risk of critically ill patients. METHODS The single-centre, prospective, observational study was conducted at the Shifa International Hospital, Islamabad, Pakistan, from November 9, 2020, to May 8, 2021, and comprised critically ill patients of either gender admitted to pulmonology, neurology, nephrology, cardiology, gastroenterology and general intensive care units. They were subjected to screening using the Nutritional Risk of Critically Ill tool, and the risk was categorised as moderate and high. Data was analysed using SPSS 23. RESULTS Of the 88 patients, 58 (66%) were males. The overall mean age of the sample was 62.71±12.62 years. The nutritional risk was moderate in 39(44%) patients and high in 49(56%). The mean Acute Physiology, Age and Chronic Health Evaluation II score, Sequential Organ Failure Assessment score and Nutritional Risk of Critically Ill was 16.73±4.34, 5.91±1.92 and 5.71±1.41, respectively. There was a significant association of nutritional risk with age (p=0.04) and Sequential Organ Failure Assessment score (p<0.001). Biochemical markers were different between those with high risk and patients with moderate risk (p<0.05). CONCLUSIONS The overall prevalence of malnutrition in critically ill patients was high which may further affect clinical outcomes.
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Affiliation(s)
- Zainab Bibi
- Department of Clinical Nutrition, Shifa International Hospital, Islamabad, Pakistan
| | - Mahpara Safdar
- Department of Nutritional Sciences and Environmental Design, Allama Iqbal Open University, Islamabad, Pakistan.
| | - Rezzan Khan
- Department of Clinical Nutrition, Shifa International Hospital, Islamabad, Pakistan
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Zhang Y, Mustieles V, Wang YX, Sun Y, Agudelo J, Bibi Z, Torres N, Oulhote Y, Slitt A, Messerlian C. Folate concentrations and serum perfluoroalkyl and polyfluoroalkyl substance concentrations in adolescents and adults in the USA (National Health and Nutrition Examination Study 2003-16): an observational study. Lancet Planet Health 2023; 7:e449-e458. [PMID: 37286242 PMCID: PMC10901144 DOI: 10.1016/s2542-5196(23)00088-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/10/2023] [Accepted: 04/21/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are a family of highly fluorinated aliphatic compounds, which are widely used in commercial applications, including food packaging, textiles, and non-stick cookware. Folate might counteract the effects of environmental chemical exposures. We aimed to explore the relationship between blood folate biomarker concentrations and PFAS concentrations. METHODS This observational study pooled cross-sectional data from the National Health and Nutrition Examination Survey (NHANES) 2003 to 2016 cycles. NHANES is a population-based national survey that measures the health and nutritional status of the US general population every 2 years by means of questionnaires, physical examination, and biospecimen collection. Folate concentrations in red blood cells and in serum, and perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorononanoic acid (PFNA), and perfluorohexane sulfonic acid (PFHxS) concentrations in serum were examined. We used multivariable regression models to assess the percentage change in serum PFAS concentrations in relation to changes in folate biomarker concentrations. We additionally used models with restricted cubic splines to investigate the shape of these associations. FINDINGS This study included 2802 adolescents and 9159 adults who had complete data on PFAS concentrations, folate biomarkers, and covariates, were not pregnant, and had never had a cancer diagnosis at the time of the survey. The mean age was 15·4 years (SD 2·3) for adolescents and 45·5 years (17·5) for adults. The proportion of male participants was slightly higher in adolescents (1508 [54%] of 2802 participants) than in adults (3940 [49%] of 9159 participants). We found negative associations between red blood cell folate concentrations and serum concentrations of PFOS (percentage change for a 2·7 fold-increase in folate level -24·36%, 95% CI -33·21 to -14·34) and PFNA (-13·00%, -21·87 to -3·12) in adolescents, and PFOA (-12·45%, -17·28 to -7·35), PFOS (-25·30%, -29·67 to -20·65), PFNA (-21·65%, -26·19 to -16·82), and PFHxS (-11·70%, -17·32 to 5·70) in adults. Associations for serum folate concentrations and PFAS were in line with those found for red blood cell folate levels, although the magnitude of the effects was lower. Restricted cubic spline models suggested linearity of the observed associations, particularly for associations in adults. INTERPRETATION In this large-scale, nationally representative study, we found consistent inverse associations for most examined serum PFAS compounds in relation to folate concentrations measured in either red blood cells or serum among both adolescents and adults. These findings are supported by mechanistic in-vitro studies that show the potential of PFAS to compete with folate for several transporters implicated in PFAS toxicokinetics. If confirmed in experimental settings, these findings could have important implications for interventions to reduce the accumulated PFAS body burden and mitigate the related adverse health effects. FUNDING United States National Institute of Environmental Health Sciences.
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Affiliation(s)
- Yu Zhang
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Vicente Mustieles
- University of Granada, Center for Biomedical Research, Granada, Spain; Instituto de Investigación Biosanitaria Ibs Granada, Granada, Spain; Consortium for Biomedical Research in Epidemiology and Public Health, Madrid, Spain
| | - Yi-Xin Wang
- Department of Nutrition, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Yang Sun
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA
| | | | - Zainab Bibi
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Massachusetts General Hospital Fertility Center, Department of Obstetrics and Gynecology, Boston, MA, USA
| | - Nicole Torres
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Massachusetts General Hospital Fertility Center, Department of Obstetrics and Gynecology, Boston, MA, USA
| | - Youssef Oulhote
- Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA
| | | | - Carmen Messerlian
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA; Massachusetts General Hospital Fertility Center, Department of Obstetrics and Gynecology, Boston, MA, USA.
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Bibi Z. Nutritional assessment of Covid-19 patients admitted in intensive care units in Pakistan. PAB 2023. [DOI: 10.19045/bspab.2023.120001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Al'Saani SMAJ, Raza L, Fatima K, Khan S, Fatima M, Ali SN, Amin M, Siddiqui M, Liaquat A, Siddiqui F, Naveed W, Naqvi T, Bibi Z. Relationship between musculoskeletal discomfort and cell phone use among young adults: A cross-sectional survey. Work 2023; 76:1579-1588. [PMID: 37355930 DOI: 10.3233/wor-220661] [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] [Indexed: 06/26/2023] Open
Abstract
BACKGROUND Cell phone usage is highly prevalent among young adults. They are used for multiple purposes including communication, studies, social networking and entertainment. However, its excessive usage has been associated with adverse health outcomes. OBJECTIVE The objective was to find the association of cell phone usage with musculoskeletal discomfort (MSD) and its associated factors. METHODS A cross-sectional study was conducted on young adult students from a low-middle income country over a period of 3 months from December 2018 to February 2019. A structured questionnaire based on the Disabilities of the Arm, Shoulder and Hand (QuickDASH scoring) was used to record the musculoskeletal discomfort. RESULTS Out of 803 questionnaires, data of 754 (94%) were entered and the remaining questionnaires (n = 49) were discarded due to incomplete answers. The mean age was 20.83 (1.62) years. In our study, there were 194 (25.7%) males and 560 (74.3%) female participants. Neck and shoulder were the most frequently affected regions. A significant difference in QuickDASH score was observed between genders (p-value p ≤ 0.001). Left-handed individuals scored significantly higher on QuickDASH score compared to right-handed individuals (p < 0.05). Increased musculoskeletal discomfort was reported by individuals with daily cell phone use of more than four hours (p < 0.05). A positive significant correlation was found between continuous one hour cell-phone use and higher mean QuickDASH scores (correlation coefficient 0.124, p value 0.001). Shorter eye-to-screen distance was significantly associated with MSD (p < 0.05). CONCLUSION Musculoskeletal discomfort is associated with the female gender, duration of cell phone use and a small eye-to-screen distance.
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Affiliation(s)
| | - Lubna Raza
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Khunsha Fatima
- Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
| | - Sehar Khan
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Mudebbera Fatima
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | | | - Mehreen Amin
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Maheen Siddiqui
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Amna Liaquat
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Fatima Siddiqui
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Wajeeha Naveed
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Tahira Naqvi
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
| | - Zainab Bibi
- Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan
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Zhang Y, Rosa G, Mustieles V, Sun Y, Bibi Z, Torres N, Hillcoat A, Wang Y, Messerlian C. P-740 Social disparities in pregnancy awareness among individuals in the general U.S. population. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
What are socio-demographic and lifestyle characteristics of pregnant individuals who were aware versus those who were unaware of pregnancy status in the general U.S. population.
Summary answer
Women unaware of their pregnancy status were more likely to be Non-Hispanic Black, living below the poverty line, and unmarried.
What is known already
The early weeks of pregnancy are critical for fetal programming of organ systems and consequently long-term offspring health. Individuals who are unaware of pregnancy are at risk of poor nutrition, inadvertent environmental chemical exposures and risky behaviors/lifestyles that contribute to inadequate prenatal care. Lack of pregnancy awareness increases the risk of pregnancy complications and misses opportunities for early intervention.
Study design, size, duration
We included 842 individuals aged between 20 to 44 years who had a positive urine pregnancy test result at time of the cross-sectional National Health and Examination Survey (NHANES), 2003-2016 cycles.
Participants/materials, setting, methods
The urine pregnancy tests and reproductive health interviews were conducted concurrently in medical examination center. We defined participants with a positive urine pregnancy test result but who reported not being pregnant during the interview as being unaware of their pregnancy status. Information on demographic, socio-economic, and lifestyle characteristics were collected by questionnaires. We employed student t test and chi-square test to compare the characteristics between individuals who were aware vs. unaware of the pregnancy.
Main results and the role of chance
Among 842 pregnant individuals, 62 (7.36%) were unaware of their pregnancy status. The mean (SE) ages (years) were similar between individuals who were unaware vs. those aware of their pregnancy status (Unaware: 28.05 (0.96) vs. Aware: 28.48 (0.32)). Compared with aware individuals, a higher proportion of the unaware group were Non-Hispanic Black (Unaware: 36.31% vs. Aware: 13.06%; p < 0.001), living in poverty (Unaware: 30.03% vs. Aware: 18.95%; p = 0.09), and unmarried (Unaware: 68.12% vs. Aware: 30.45%; p < 0.001). No significant differences were found for education (College degree and above: Unaware: 60.73% vs. Aware: 67.73%; p = 0.33) and smoking behavior between the two groups (Current smoker: Unaware: 4.97% vs. Aware: 8.88%; p = 0.38).
Limitations, reasons for caution
The sample size of this study was relatively small. Findings may not be representative of population characteristics.
Wider implications of the findings
Our findings point to significant social disparities in pregnancy awareness and have important implications for clinical practice and early identification of high-risk pregnancies.
Trial registration number
not applicable
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Affiliation(s)
- Y Zhang
- Harvard T H Chan School of Public Health, Department of Environmental Health , Boston, U.S.A
| | - G Rosa
- Harvard T H Chan School of Public Health, Department of Epidemiology , Boston, U.S.A
| | - V Mustieles
- University of Granada, Center for Biomedical Research CIBM. Instituto de Investigación Biosanitaria Ibs GRANADA. Consortium for Biomedical Research in Epidemiology and Public Health CIBERESP. , Granada, Spain
| | - Y Sun
- Harvard T H Chan School of Public Health, Department of Epidemiology , Boston, U.S.A
| | - Z Bibi
- Harvard T H Chan School of Public Health, Department of Epidemiology , Boston, U.S.A
| | - N Torres
- Harvard T H Chan School of Public Health, Department of Epidemiology , Boston, U.S.A
| | - A Hillcoat
- Harvard T H Chan School of Public Health, Department of Epidemiology , Boston, U.S.A
| | - Y.X Wang
- Harvard T H Chan School of Public Health, Department of Nutrition , Boston, U.S.A
| | - C Messerlian
- Harvard T H Chan School of Public Health, Department of Environmental Health- Department of Epidemiology , Boston, U.S.A
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Bibi Z, Sattar H, Asif Nawaz M, Karim A, Pervez S, Ali Ul Qader S, Aman A. Polyacrylamide hydrogel carrier (matrix-type macrogel beads): Improvement in the catalytic behavior, stability, and reusability of industrially valuable xylanase from a thermophile Geobacillus stearothermophilus. Current Research in Biotechnology 2022. [DOI: 10.1016/j.crbiot.2022.03.006] [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: 10/18/2022] Open
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Shernoff ES, Frazier SL, Lisetti C, Delmarre A, Bibi Z, Gabbard J. Supporting the Implementation of Evidence-Based Behavior Management Practices through Simulation: A Mixed Method Study. Journal of Educational and Psychological Consultation 2021. [DOI: 10.1080/10474412.2021.1875840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Bibi Z, Fatima A, Rani R, Maqbool A, Khan S, Naz S, Waseem S. Genetic characterization of Plasmodium vivax isolates from Pakistan using circumsporozoite protein (pvcsp) and merozoite surface protein-1 (pvmsp-1) genes as genetic markers. Malar J 2021; 20:112. [PMID: 33632220 PMCID: PMC7908770 DOI: 10.1186/s12936-021-03654-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 02/16/2021] [Indexed: 03/06/2023] Open
Abstract
Background Plasmodium vivax contributes to over 70% malaria burden in Pakistan, but limited data exists on various aspects including genetic diversity of the parasite as compared to other parts of the world. Since the information about the genetic diversity of P. vivax assists to understand the population dynamics of the parasite, the current study was designed to understand population divergence of P. vivax in Pakistan using circumsporozoite protein (pvcsp) and merozoite surface protein-1 (pvmsp-1) genes as molecular markers. Methods The PCR for pvcsp and pvmsp-1 genes was carried out for 150 P. vivax isolates, followed by DNA sequencing of 35 and 30, respectively. Genetic diversity and polymorphism were analysed using ChromasPro, ClustalW, MEGA7, DnaSP v.5 and WebLogo programs. Results The PCR for pvcsp and pvmsp-1 genes was carried out for 150 P. vivax isolates and resulting the PCR products of 1100 bp for pvcsp and ~ 400 bp for pvmsp-1 genes, respectively. In the central-repeat region (CRR) of pvcsp gene, sequences comprised of four variable repeats of PRMs, out of which GDRADGQPA (PRM1), GDRAAGQPA (PRM2) were more extensively dispersed among the P. vivax isolates. Partial sequences (~ 400 bp) of block 2 of pvmsp-1 gene depicted high level of diversity. Conclusion The results revealed the polymorphism and genetic diversity especially at the CRR of pvcsp and block 2 of pvmsp-1 genes, respectively. The base-line data presented here warrants future studies to investigate more into the genetic diversity of P. vivax with large sample size from across the country for better understanding of population dynamics of P. vivax that will help to control malaria at individual and community level.
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Affiliation(s)
- Zainab Bibi
- Department of Molecular Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Anam Fatima
- Department of Medicine, Polyclinic Hospital, Islamabad, Pakistan
| | - Rehana Rani
- Department of Life Sciences, Abasyn University, Islamabad, Pakistan
| | - Ayesha Maqbool
- Department of Molecular Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Samea Khan
- Department of Molecular Biology, Virtual University of Pakistan, Lahore, Pakistan
| | - Shumaila Naz
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan.
| | - Shahid Waseem
- Alpha Genomics (Pvt) Ltd, Islamabad, Pakistan. .,ABO SCIENTIFIC, Dhamial Road, Rawalpindi, Pakistan.
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Khattak R, Khan MS, Ullah R, Zainab, Sony, Ali M, Rahman W, Hakeem F, Ayaz K, Bibi Z. Effect of the ionic strength on the redox reaction of dicyanobis(bipyridine)iron(III)‐iodide in binary and ternary solvent systems. INT J CHEM KINET 2021. [DOI: 10.1002/kin.21419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Rozina Khattak
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Muhammad Sufaid Khan
- Department of Chemistry Chakdara Dir (L) University of Malakand Khyber Pakhtunkhwa Pakistan
| | - Rizwan Ullah
- National Center of Excellence in Physical Chemistry University of Peshawar Peshawar Pakistan
| | - Zainab
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Sony
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Mahnoor Ali
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Wajeeha Rahman
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Faryal Hakeem
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Kainat Ayaz
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
| | - Zainab Bibi
- Department of Chemistry Shaheed Benazir Bhutto Women University Peshawar Pakistan
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Bibi Z, Khalid A, Iftikhar I, Rizwan M, Mehmood A, Khan S, Munir A. In silico Structure Prediction and Functional Annotation of Ananas comosus Hypothetical Protein OAY63476.1. Int J Bioautomation 2020. [DOI: 10.7546/ijba.2020.24.4.000600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Hypothetical proteins (HPs) are those whose sequence is present but nothing is known about their structural and functional annotations. Elucidation of structural and functional insights would be effective enough in perceiving the protein interactions and their involvement in various pathways and networks. Ananas comosus is considered as third most essential tropical fruit and is given more consideration from the commercial point of view; therefore, in this research, it is taken for analysis using different approaches of bioinformatics. On the basis of subcellular localization and secondary structure analysis, it was suggested that HP is the nuclear protein consisting of α helices and more abundant coils. Homology modeling has been done through Swiss Model to determine their template structure but template identity score is not enough which uncover the fact that the protein OAY63476.1 is unpredicted in-vitro. In order to predict the 3D structure of protein, Phyre 2 server is utilized. Results are validated by different strategies revealing the stability of the developed model. The quality factor of this protein is 45.28. Functional analysis and domain identification have been performed by using NCBI-CDD and Pfam which suggested that protein contains ring variant domain. Comparative genome analysis has been performed with other proteins of plants which demonstrate that the selected protein has the highest similarity. This study paves the way in order to determine the structural and functional annotations of other uncharacterized proteins and effective in exploring other novel proteins along with their functions in the same way as that of this research study.
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Siddiqui M, Fatima K, Ali SN, Fatima M, Naveed W, Siddiqui F, Naqvi T, Khan S, Amin M, Liaquat A, Bibi Z. Prevalence and Predictors of Contraception Usage in Karachi, Pakistan. Cureus 2020; 12:e11265. [PMID: 33274142 PMCID: PMC7707907 DOI: 10.7759/cureus.11265] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2020] [Indexed: 12/02/2022] Open
Abstract
Background Contraception, also known as family planning, refers to methods that intercept unwanted pregnancies. The modalities of contraception have evolved and multiplied over time to facilitate users. Despite enormous benefits, the contraceptive methods remain underutilized in developing countries such as Pakistan. Accordingly, the primary purpose of our study is to determine the prevalence, perception, and attitude of contraceptive usage in Karachi. The study further assesses the knowledge and core determinants of contraception. Methods A cross-sectional study was conducted in Karachi, Pakistan. The sample population comprised currently married males and females residing in Karachi, with females from 16 to 45 years of age and males of 16 years of age and forth. Pregnant females, divorcees, and widowed individuals were excluded. A pre-tested questionnaire was administered to record the demographics, knowledge, and frequency of contraceptive usage, and attitude and perception towards contraception. The data were analyzed using the Statistical Package for the Social Sciences (SPSS( v. 23.0 (IBM Corp. Armonk, NY). Results Results depicted that 93.4% (n=468) had knowledge of contraception while 49.7% (n=249) were currently using contraception. The most frequently employed contraceptive modality emerged as condoms (n=163, 65.5%), followed by withdrawal (n=71, 28.5%) and pills (n=62, 24.9%). The prevalence of contraceptive usage was more inclined towards the educated stratum and higher socioeconomic class. Potential predictors for contraceptive usage came out as the number of children, knowledge regarding contraception, spouse's support for usage, a desire for more children, and family planning counseling (p<0.05). Conclusion There is a drastic increase in the prevalence of contraceptive usage in Pakistan as compared to previous studies. Efforts must be made to further augment the knowledge and awareness regarding contraceptive modalities to increase acceptability and eliminate myths prevalent in society regarding contraception.
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Affiliation(s)
- Maheen Siddiqui
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Khunsha Fatima
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Syeda Nimrah Ali
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Mudebbera Fatima
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Wajeeha Naveed
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Fatima Siddiqui
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Tahira Naqvi
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Sehar Khan
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Mehreen Amin
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Amna Liaquat
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
| | - Zainab Bibi
- Internal Medicine, Dow University of Health Sciences, Karachi, PAK
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Waqas M, Us-Salam I, Bibi Z, Wang Y, Li H, Zhu Z, He S. Stem Cell-Based Therapeutic Approaches to Restore Sensorineural Hearing Loss in Mammals. Neural Plast 2020; 2020:8829660. [PMID: 32802037 PMCID: PMC7416290 DOI: 10.1155/2020/8829660] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/01/2020] [Accepted: 07/03/2020] [Indexed: 12/13/2022] Open
Abstract
The hair cells that reside in the cochlear sensory epithelium are the fundamental sensory structures responsible for understanding the mechanical sound waves evoked in the environment. The intense damage to these sensory structures may result in permanent hearing loss. The present strategies to rehabilitate the hearing function include either hearing aids or cochlear implants that may recover the hearing capability of deaf patients to a limited extent. Therefore, much attention has been paid on developing regenerative therapies to regenerate/replace the lost hair cells to treat the damaged cochlear sensory epithelium. The stem cell therapy is a promising approach to develop the functional hair cells and neuronal cells from endogenous and exogenous stem cell pool to recover hearing loss. In this review, we specifically discuss the potential of different kinds of stem cells that hold the potential to restore sensorineural hearing loss in mammals and comprehensively explain the current therapeutic applications of stem cells in both the human and mouse inner ear to regenerate/replace the lost hair cells and spiral ganglion neurons.
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Affiliation(s)
- Muhammad Waqas
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal Campus, Karachi, Pakistan
- Department of Otolaryngology Head and Neck, Nanjing Tongren Hospital, School of Medicine, Southeast University, Nanjing 211102, China
| | - Iram Us-Salam
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal Campus, Karachi, Pakistan
| | - Zainab Bibi
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal Campus, Karachi, Pakistan
| | - Yunfeng Wang
- ENT Institute and Otorhinolaryngology Department of Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200031, China
| | - He Li
- Department of Otolaryngology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou City, 325000 Zhejiang Province, China
| | - Zhongshou Zhu
- Department of Otolaryngology, Ningde Municipal Hospital Affiliated of Fujian Medical University (Ningde Institute of Otolaryngology), Ningde, Fujian 352100, China
| | - Shuangba He
- Department of Otolaryngology Head and Neck, Nanjing Tongren Hospital, School of Medicine, Southeast University, Nanjing 211102, China
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Zerp SF, Bibi Z, Verbrugge I, Voest EE, Verheij M. Enhancing radiation response by a second-generation TRAIL receptor agonist using a new in vitro organoid model system. Clin Transl Radiat Oncol 2020; 24:1-9. [PMID: 32577539 PMCID: PMC7303921 DOI: 10.1016/j.ctro.2020.05.012] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/27/2020] [Accepted: 05/29/2020] [Indexed: 02/07/2023] Open
Abstract
We evaluated the effect of the second-generation TRAIL receptor agonist APG-880 on radiation-induced cytotoxicity. The combined effect was studied in short-term and long-term cytotoxicity assays in established CRC cell lines, and tumor organoids derived from colon cancer patients. We observed a supra-additive effect on cytotoxicity when APG-880 and radiation were combined simultaneously, with combination indices around 0.7. In long-term survival assays, we demonstrated a radiosensitizing effect of APG-880 with dose enhancement factors between 1.3 and 1.5.
Background For many cancer types, including colorectal carcinoma (CRC), combined modality treatments have shown to improve outcome, but are frequently associated with significant toxicity, illustrating the need for new therapeutic approaches. Based on preclinical data, TRAIL receptor agonists appeared to be promising agents for cancer therapy especially in combination with DNA damaging regimens. Here, we present the combination of the second-generation TRAIL receptor agonist APG-880 with radiation in a new and clinically relevant 3D model system. Methods To investigate the effect of APG-880 in combination with radiation we performed short-term cytotoxicity and long-term clonogenic survival assays in established CRC cell lines, and in tumor organoids derived from colon cancer patients. Results APG-880 is a potent inducer of apoptosis in CRC cell lines and in patient-derived CRC organoids. Furthermore, a supra-additive effect on cytotoxicity was found when APG-880 and radiation were combined simultaneously, with combination indices around 0.7. Lastly, in the long-term survival assays, we demonstrated a radiosensitizing effect of APG-880 with dose enhancement factors between 1.3 and 1.5. Conclusions In a new, clinically relevant CRC-organoid model system we demonstrated a more than additive combined effect between the second-generation TRAIL receptor agonist APG-880 and radiation.
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Affiliation(s)
- Shuraila F. Zerp
- Division of Cell Biology, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Zainab Bibi
- Division of Cell Biology, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Inge Verbrugge
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Emile E. Voest
- Division of Oncogenomics, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Marcel Verheij
- Division of Cell Biology, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
- Department of Radiation Oncology, The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
- Corresponding author at: The Netherlands Cancer Institute – Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.
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Iftikhar I, Khalid A, Bibi Z, Mehmood A, Rizwan M, Khan S, Munir A. Computational Prediction of Tumor-Specific Antigens as Potential Vaccine Candidates against Germ-line Mutations in Endometrial Cancer. app 2019. [DOI: 10.13189/app.2019.070401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sattar H, Bibi Z, Kamran A, Aman A, Ul Qader SA. Degradation of complex casein polymer: Production and optimization of a novel serine metalloprotease from Aspergillus niger KIBGE-IB36. Biocatalysis and Agricultural Biotechnology 2019. [DOI: 10.1016/j.bcab.2019.101256] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bibi Z, Ansari A, Zohra RR, Aman A, Ul Qader SA. Production of xylan degrading endo-1, 4-β-xylanase from thermophilicGeobacillus stearothermophilusKIBGE-IB29. Journal of Radiation Research and Applied Sciences 2019. [DOI: 10.1016/j.jrras.2014.08.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Zainab Bibi
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
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Bibi Z, Ul Qader SA, Aman A, Ur Rehman H, Nawaz MA, Karim A, Us Salam I, Waqas M, Kamran A. Xylan deterioration approach: Purification and catalytic behavior optimization of a novel β-1,4-d-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29. ACTA ACUST UNITED AC 2019; 21:e00299. [PMID: 30619731 PMCID: PMC6312829 DOI: 10.1016/j.btre.2018.e00299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 12/16/2018] [Accepted: 12/17/2018] [Indexed: 12/05/2022]
Abstract
β-1,4-d-Xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29 was purified and characterized. The catalytic properties revealed significant stability over broad pH and temperature range. Native-PAGE and In-gel activity assay were carried out. Various organic solvents and detergents significantly improved the enzyme activity. β-1,4-d-Xylanohydrolase showed excellent storage stability for prospective industrial use.
The β-1,4-d-xylanohydrolase is an industry valuable catalytic protein and used to synthesize xylooligosaccharides and xylose. In the current study, β-1,4-d-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29 was partially purified up to 9.5-fold with a recovery yield of 52%. It exhibited optimal catalytic activity at pH-7.0 and 50 °C within 5 min. Almost 50% activity retained at pH-4.0 to 9.0 however, 70% activity observed within the range of 40 °C to 70 °C. The β-1,4-d-xylanohydrolase showed a significant hydrolytic pattern with 48.7 kDa molecular mass. It was found that the enzymatic activity improved up to 160% with 1.0 mM ethanol. Moreover, the activity of enzyme drastically increased up to 2.3 and 1.5 fold when incubated with Tween 80 and Triton X-100 (1.0 mM), respectively. The β-1,4-d-xylanohydrolase also retained 72% activity at −80 °C after 180 days. Such a remarkable biochemical properties of β-1,4-d-xylanohydrolase make it possible to forecast its potential use in textile and food industries.
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Affiliation(s)
- Zainab Bibi
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology (FUUAST), Gulshan-e-Iqbal Campus, Karachi, 75300, Pakistan
| | - Shah Ali Ul Qader
- Department of Biochemistry, University of Karachi, Karachi, 75270, Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
| | - Haneef Ur Rehman
- Department of Chemistry, University of Turbat, Kech, Balochistan, Pakistan
| | - Muhammad Asif Nawaz
- Department of Biotechnology, Shaheed Benazir Bhutto University, Sheringal, Dir Upper, KPK, Pakistan
| | - Asad Karim
- Jamil-Ur-Rahman Center for Genome Research, Dr. Punjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Science (ICCBS), University of Karachi, Karachi, 75270, Pakistan
| | - Irum Us Salam
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology (FUUAST), Gulshan-e-Iqbal Campus, Karachi, 75300, Pakistan
| | - Muhammad Waqas
- Department of Biotechnology, Federal Urdu University of Arts, Science and Technology (FUUAST), Gulshan-e-Iqbal Campus, Karachi, 75300, Pakistan
| | - Aysha Kamran
- Georg-August University School of Science (GAUSS), Georg-August-University Goettingen, Germany.,Department of Biotechnology, University of Karachi, Karachi-75270, Pakistan
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Bibi Z, Nawaz MA, Irum-Us-Salam, Waqas M, Aman A, Qader SAU. Significance of metal ions, solvents and surfactants to improve the xylan degrading behavior of β-1,4-D-xylanohydrolase from Geobacillus stearothermophilus KIBGE-IB29. Biocatalysis and Agricultural Biotechnology 2019. [DOI: 10.1016/j.bcab.2018.11.028] [Citation(s) in RCA: 2] [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: 10/27/2022]
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Kamran A, Bibi Z, Aman A, Ul Qader SA. Purification and catalytic behavior optimization of lactose degrading β-galactosidase from Aspergillus nidulans. J Food Sci Technol 2018; 56:167-176. [PMID: 30728558 DOI: 10.1007/s13197-018-3470-x] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Revised: 10/07/2018] [Accepted: 10/19/2018] [Indexed: 11/30/2022]
Abstract
The β-galactosidase is an industrially valuable enzyme and used to hydrolyze the lactose into glucose and galactose. Considering the broad utility profile in food industry, β-galactosidase from Aspergillus nidulans was purified and characterized in term of its catalytic properties and stability. It displayed highest catalytic efficiency at 60 °C after 10.0 min within acidic pH environment (pH 5). The β-galactosidase exhibited 100% and 60% catalytic activity at 40 °C and 50 °C, respectively even after 120.0 min. The β-galactosidase activity was remained stable in the presence of Zn2+, Ni2+, and Mg2+ ions. The activity was also retained in all investigated organic solvents except DMSO at various ionic concentrations. The surfactants Triton X-100 and SDS caused positive impact on the catalytic activity of enzyme at 1.0 mM concentration. However, the percent relative activity of β-galactosidase was significantly reduced when incubated with EDTA. The molecular mass of β-galactosidase estimated to be 95 kDa. The SEM micrographs of ONPG before and after β-galactosidase treatment indicated a remarkable difference in the morphology and proved the strong catalytic strength of enzyme. The β-galactosidase also demonstrated exceptional storage stability at - 80 °C, - 20 °C and 4 °C by retaining 86, 79 and 70% activity even after 100.0 days.
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Affiliation(s)
- Aysha Kamran
- 1Georg-August University School of Science (GAUSS), Georg-August-University Goettingen, Göttingen, Germany.,2Department of Biotechnology, University of Karachi, Karachi, 75270 Pakistan
| | - Zainab Bibi
- 3Department of Biotechnology, Federal Urdu University of Arts, Science and Technology (FUUAST), Gulshan-e-Iqbal Campus, Karachi, 75300 Pakistan
| | - Afsheen Aman
- 4The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270 Pakistan
| | - Shah Ali Ul Qader
- 5Department of Biochemistry, University of Karachi, Karachi, 75270 Pakistan
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Nawaz MA, Bibi Z, Karim A, Rehman HU, Jamal M, Jan T, Aman A, Qader SAU. Production of α-1,4-glucosidase from Bacillus licheniformis KIBGE-IB4 by utilizing sweet potato peel. Environ Sci Pollut Res Int 2017; 24:4058-4066. [PMID: 27928754 DOI: 10.1007/s11356-016-8168-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 06/20/2016] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
In the current study, sweet potato peel (Ipomoea batatas) was observed as the most favorable substrate for the maximum synthesis of α-1,4-glucosidase among various agro-industrial residues. Bacillus licheniformis KIBGE-IB4 produced 6533.0 U ml-1 of α-1,4-glucosidase when growth medium was supplemented with 1% dried and crushed sweet potato peel. It was evident from the results that bacterial isolate secreted 6539.0 U ml-1 of α-1,4-glucosidase in the presence of 0.4% peptone and meat extract with 0.1% yeast extract. B. licheniformis KIBGE-IB4 released 6739.0 and 7190.0 U ml-1 of enzyme at 40 °C and pH 7.0, respectively. An improved and cost-effective growth medium design resulted 8590.0 U ml-1 of α-1,4-glucosidase with 1.3-fold increase as compared to initial amount from B. licheniformis KIBGE-IB4. This enzyme can be used to fulfill the accelerating demand of food and pharmaceutical industries. Further purification and immobilization of this enzyme can also enhance its utility for various commercial applications. Graphical abstract Pictorial representation of maltase production from sweet potato peel.
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Affiliation(s)
- Muhammad Asif Nawaz
- Department of Biotechnology, Shaheed Benazir Bhutto University, Sheringal, Dir Upper, KPK, Pakistan.
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan.
| | - Zainab Bibi
- Department of Biotechnology, Federal Urdu University of Arts, Science, and Technology, Karachi, Pakistan.
| | - Asad Karim
- National Institute of Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Haneef Ur Rehman
- Department of Chemistry, University of Turbat, Kech, Balochistan, Pakistan
| | - Muhsin Jamal
- Department of Microbiology, Abdul Wali Khan University, Garden Campus, Mardan, Pakistan
| | - Tour Jan
- Department of Botany, University of Malakand, Chaldara, KPK, Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
| | - Shah Ali Ul Qader
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
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Affiliation(s)
- Aysha Kamran
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE); University of Karachi; Karachi 75270 Pakistan
| | - Zainab Bibi
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE); University of Karachi; Karachi 75270 Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE); University of Karachi; Karachi 75270 Pakistan
| | - Shah Ali Ul Qader
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE); University of Karachi; Karachi 75270 Pakistan
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Nawaz MA, Aman A, Rehman HU, Bibi Z, Ansari A, Islam Z, Khan IA, Qader SAU. Polyacrylamide Gel-Entrapped Maltase: An Excellent Design of Using Maltase in Continuous Industrial Processes. Appl Biochem Biotechnol 2016; 179:383-97. [DOI: 10.1007/s12010-016-2001-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 01/27/2016] [Indexed: 11/29/2022]
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Kamran A, Bibi Z, Aman A, Qader SAU. Lactose hydrolysis approach: Isolation and production of β-galactosidase from newly isolated Bacillus strain B-2. Biocatalysis and Agricultural Biotechnology 2016. [DOI: 10.1016/j.bcab.2015.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Nawaz MA, Rehman HU, Bibi Z, Aman A, Ul Qader SA. Continuous degradation of maltose by enzyme entrapment technology using calcium alginate beads as a matrix. Biochem Biophys Rep 2015; 4:250-256. [PMID: 29124211 PMCID: PMC5669356 DOI: 10.1016/j.bbrep.2015.09.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 09/28/2015] [Accepted: 09/30/2015] [Indexed: 11/01/2022] Open
Abstract
Maltase from Bacillus licheniformis KIBGE-IB4 was immobilized within calcium alginate beads using entrapment technique. Immobilized maltase showed maximum immobilization yield with 4% sodium alginate and 0.2 M calcium chloride within 90.0 min of curing time. Entrapment increases the enzyme-substrate reaction time and temperature from 5.0 to 10.0 min and 45 °C to 50 °C, respectively as compared to its free counterpart. However, pH optima remained same for maltose hydrolysis. Diffusional limitation of substrate (maltose) caused a declined in Vmax of immobilized enzyme from 8411.0 to 4919.0 U ml-1 min-1 whereas, Km apparently increased from 1.71 to 3.17 mM ml-1. Immobilization also increased the stability of free maltase against a broad temperature range and enzyme retained 45% and 32% activity at 55 °C and 60 °C, respectively after 90.0 min. Immobilized enzyme also exhibited recycling efficiency more than six cycles and retained 17% of its initial activity even after 6th cycles. Immobilized enzyme showed relatively better storage stability at 4 °C and 30 °C after 60.0 days as compared to free enzyme.
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Affiliation(s)
| | | | | | | | - Shah Ali Ul Qader
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi 75270, Pakistan
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Bibi Z, Qader SAU, Aman A. Calcium alginate matrix increases the stability and recycling capability of immobilized endo-β-1,4-xylanase from Geobacillus stearothermophilus KIBGE-IB29. Extremophiles 2015; 19:819-27. [PMID: 26001519 DOI: 10.1007/s00792-015-0757-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 05/10/2015] [Indexed: 12/21/2022]
Abstract
Exploration of microbial pool from extremely diversified ecosystem is significantly important for various industrial applications. Bacterial communities from extreme habitats including volcanic vents, hot springs, and industrial sectors are eagerly explored for the isolation of thermophiles. Geobacillus stearothermophilus KIBGE-IB29, isolated from blast furnace site of a steel processing industry, is capable of producing thermostable endo-β-1,4-xylanase. In the current study, this enzyme was immobilized within calcium alginate beads using entrapment technique. Amalgamation of sodium alginate (40.0 gL(-1)) and calcium chloride (0.4 M) was used for the formation of immobilized beads. It was observed that temperature (50 °C) and pH (7.0) optima of immobilized enzyme remained same, but enzyme-substrate reaction time increased from 5.0 to 30.0 min as compared to free enzyme. Diffusion limit of high molecular weight xylan (corncob) caused a decline in V max of immobilized enzyme from 4773 to 203.7 U min(-1), whereas K m value increased from 0.5074 to 0.5722 mg ml(-1) with reference to free enzyme. Immobilized endo-β-1,4-xylanase showed its stability even at high temperatures as compared to free enzyme and retained 18 and 9 % residual activity at 70 and 80 °C, respectively. Immobilized enzyme also exhibited sufficient recycling efficiency up to five reaction cycles which indicated that this enzyme can be a plausible candidate in paper and pulp industry.
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Affiliation(s)
- Zainab Bibi
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, 75270, Pakistan
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Bibi Z, Shahid F, Ul Qader SA, Aman A. Agar–agar entrapment increases the stability of endo-β-1,4-xylanase for repeated biodegradation of xylan. Int J Biol Macromol 2015; 75:121-7. [DOI: 10.1016/j.ijbiomac.2014.12.051] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/21/2014] [Accepted: 12/23/2014] [Indexed: 10/24/2022]
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Nawaz MA, Bibi Z, Aman A, Zohra RR, Qader SAU. Enhanced production of maltase (α-glucosidase) from newly isolated strain of Bacillus licheniformis KIBGE-IB4. Pak J Pharm Sci 2014; 27:1437-1442. [PMID: 25176237] [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: 06/03/2023]
Abstract
Maltase (alpha-glucosidase) hydrolyzes α-(1→4) glucosidic bond of maltose into two glucose molecules. It is widely used in various foods, beverages and also in textile and biofuel industries. During current study, various physicochemical parameters for maltase production from newly isolated strain of Bacillus licheniformis KIBGE-IB4 were optimized using one-factor-at-a-time methodology. It was found that Bacillus licheniformis KIBGE-IB4 produced maximum maltase at 37°C, pH-7.0 after 48 hours using wheat starch (2.5%) as carbon source along with peptone (1.0%), yeast extract (0.2%) and meat extract (0.4%) as nitrogen sources in fermentation medium. It is concluded that the optimization of various medium ingredients and conditions increases maltase production upto 6.74 fold from B. licheniformis KIBGE-IB4 as compared to previously reported media and this strain could be used for the commercial production of maltase.
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Affiliation(s)
- Muhmmad Asif Nawaz
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan
| | - Zainab Bibi
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan
| | - Raheela Rahmat Zohra
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan
| | - Shah Ali Ul Qader
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan
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Kharami A, Bibi Z, Nielsen H, Høiby N, Döring G. Effect of Pseudomonas aeruginosa rhamnolipid on human neutrophil and monocyte function. APMIS 1989; 97:1068-72. [PMID: 2514775] [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: 01/01/2023]
Abstract
The effect of rhamnolipid purified from culture supernatant of Pseudomonas aeruginosa on human peripheral blood neutrophil and monocyte function was studied. It was shown that rhamnolipid at concentrations of up to 100 micrograms/ml did not affect neutrophil and monocyte chemotaxis towards various chemoattractants. The rhamnolipid by itself did not show chemotactic activity and did not induce any oxidative burst response. Preincubation of monocytes with rhamnolipid enhanced the oxidative burst response of these cells to phorbol myristate acetate (PMA) and to opsonized zymosan by 2 to 5 fold. The priming effect was observed both in a superoxide assay and in a chemiluminescence assay. However, rhamnolipid did not prime the neutrophil oxidative burst response. Monocytes/macrophages are involved in the inflammatory process in the lung infections caused by P. aeruginosa and oxygen radicals are known to cause tissue damage. Therefore the priming by rhamnolipid of monocytes for enhanced generation of oxygen radicals may play a role in the pathogenesis of tissue damage in the lungs of cystic fibrosis patients with P. aeruginosa infections.
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Affiliation(s)
- A Kharami
- Statens Seruminstitut, Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
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Affiliation(s)
- G Döring
- Abteilung für Allgemeine und Umwelthygiene, Eberhard-Karls-Universität, Tübingen, BRD
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