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Aguilar-Ramírez E, Reyes-Pérez V, Fajardo-Hernández CA, Quezada-Suaste CD, Carreón-Escalante M, Merlin-Lucas V, Quiroz-García B, Granados-Soto V, Rivera-Chávez J. Harnessing the Reactivity of Duclauxin toward Obtaining hPTP1B 1-400 Inhibitors. J Med Chem 2023; 66:16222-16234. [PMID: 38051546 DOI: 10.1021/acs.jmedchem.3c01594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Duclauxin (1) from Talaromyces sp. IQ-313 was reported as a putative allosteric modulator of human recombinant protein tyrosine phosphatase 1B (400 amino acids) (hPTP1B1-400), a validated target for the treatment of type II diabetes. Based on these findings, a one-strain-many-compound (OSMAC) experiment on the IQ-313 strain generated derivatives 5a, 6, and 7. Moreover, a one-/two-step semisynthetic approach guided by docking toward hPTP1B1-400 produced 38 analogs, a series (A) incorporating a lactam functionalization at C-1 (8a-15a, 36a, and 37a) and a series (B) containing a lactam at C-1 and an extra unsaturation between C-7 and C-8 (5b, 11b-37b). In vitro evaluation and structure-activity relationship (SAR) analysis revealed that analogs from the B series are up to 10-fold more active than 1 and derivatives from the A series. Furthermore, duclauxin (1) and 36b were assessed for their potential acute toxicity, estimating their LD50 to be higher than 300 mg/kg. Moreover, 36b significantly reduced glycemia in an insulin tolerance test in mice, suggesting that its mechanism of action is through the PTP1B inhibition.
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Affiliation(s)
- Enrique Aguilar-Ramírez
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Valeria Reyes-Pérez
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Carlos A Fajardo-Hernández
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Carlos D Quezada-Suaste
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Mario Carreón-Escalante
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Verenice Merlin-Lucas
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Beatriz Quiroz-García
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Vinicio Granados-Soto
- Pharmacobiology Department, Centro de Investigación y de Estudios Avanzados, Sede Sur, Mexico City 14330, Mexico
| | - José Rivera-Chávez
- Department of Natural Products, Institute of Chemistry, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
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Cárdenas-Castro AP, Bianchi F, Tallarico-Adorno MA, Montalvo-González E, Sáyago-Ayerdi SG, Sivieri K. In vitro colonic fermentation of Mexican “taco” from corn-tortilla and black beans in a Simulator of Human Microbial Ecosystem (SHIME®) system. Food Res Int 2019; 118:81-88. [DOI: 10.1016/j.foodres.2018.05.072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 05/27/2018] [Accepted: 05/30/2018] [Indexed: 12/15/2022]
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Ahmad M, Ahmad I, Hilger TH, Nadeem SM, Akhtar MF, Jamil M, Hussain A, Zahir ZA. Preliminary study on phosphate solubilizing Bacillus subtilis strain Q3 and Paenibacillus sp. strain Q6 for improving cotton growth under alkaline conditions. PeerJ 2018; 6:e5122. [PMID: 30013829 PMCID: PMC6035724 DOI: 10.7717/peerj.5122] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 06/07/2018] [Indexed: 11/25/2022] Open
Abstract
Background Low phosphorus availability limits crop production in alkaline calcareous soils in semi-arid regions including Pakistan. Phosphate solubilizing bacteria may improve crop growth on alkaline calcareous soils due to their ability to enhance P availability. Methods Twenty rhizobacterial isolates (Q1–Q20) were isolated from rhizosphere of cotton and characterized for their growth promoting attributes in vitro. The selected phosphate solubilizing isolates were further screened for their ability to improve cotton growth under axenic conditions (jar trial). The phosphorus solubilization capacities of selected strains were quantified and these strains were identified through 16S rDNA sequencing. Results Isolates Q2, Q3, Q6, Q7, Q8, Q13 and Q14 were able to solubilize phosphate from insoluble sources. Most of these isolates also possessed other traits including catalase activity and ammonia production. The growth promotion assay showed that Q3 was significantly better than most of the other isolates followed by Q6. Maximum root colonization (4.34 × 106 cfu g−1) was observed in case of isolate Q6 followed by Q3. The phosphorus solubilization capacities of these strains were quantified, showing a maximum phosphorus solubilization by Q3 (optical density 2.605 ± 0.06) followed by the Q6 strain. The strain Q3 was identified as Bacillus subtilis (accession # KX788864) and Q6 as Paenibacillus sp. (accession # KX788865) through 16S rDNA sequencing. Discussion The bacterial isolates varied in their abilities for different growth promoting traits. The selected PGPR Bacillus subtilis strain Q3 and Paenibacillus sp. strain Q6 have multifarious growth promoting traits including ability to grow at higher EC and pH levels, and phosphorus solubilizing ability. These strains can efficiently colonize cotton roots under salt affected soils and help plants in phosphorus nutrition. It is concluded that both strains are potential candidates for promoting cotton growth under alkaline conditions, however further investigation is required to determine their potential for field application.
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Affiliation(s)
- Maqshoof Ahmad
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Iqra Ahmad
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Thomas H Hilger
- Institute of Agricultural Sciences in the Tropics (Hans-Ruthenberg Institute), University of Hohenheim, Stuttgart, Germany
| | - Sajid M Nadeem
- Department of Soil Science, University of Agriculture Faisalabad, Sub-campus Burewala-Vehari, Pakistan, Burewala, Punjab, Pakistan
| | - Muhammad F Akhtar
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Moazzam Jamil
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Azhar Hussain
- Department of Soil Science, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Punjab, Pakistan
| | - Zahir A Zahir
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, Punjab, Pakistan
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Prebiotic effect of predigested mango peel on gut microbiota assessed in a dynamic in vitro model of the human colon (TIM-2). Food Res Int 2017; 118:89-95. [PMID: 30898357 DOI: 10.1016/j.foodres.2017.12.024] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/05/2017] [Accepted: 12/12/2017] [Indexed: 01/17/2023]
Abstract
Mango (Mangifera indica L.) peel (MP), is a by-product from the industrial processing to obtain juices and concentrates, and is rich in polyphenols and dietary fiber (DF). DF content of dried MP is about 40%. The aim of this study was to determine the prebiotic potential of this by-product submitting predigested mango ('Ataulfo') peel to a dynamic in vitro model of the human colon. Dried MPs were predigested following an enzymatic treatment and separating digestion products and undigested material by diafiltration. The predigested samples were fermented in a validated in vitro model of the colon (TIM-2) using human fecal microbiota and sampled after 0, 24, 48 and 72h. A carbohydrate mixture of standard ileal effluent medium (SIEM) was used as control. Production of short chain fatty acids (SCFA), branched chain fatty acids (BCFA) and ammonia profiles were determined in both lumen and dialysates. Microbiota composition was determined by sequencing 16S rRNA gene V3-V4 region. Principal component (PC) analysis of fermentation metabolites and relative abundance of genera was carried out. Fermentation of MP resulted in SCFA concentrations resembling those found in the SIEM experiments, with a 56:19:24 molar ratio for acetic, propionic and butyric acids, respectively. BCFA and ammonia were produced in similar concentrations in both samples. About 80 bacterial genera were identified after fermentation of MP, with an 83% relative abundance of Bifidobacterium at 24h. Three PC were identified; PC1 was influenced by a high Bifidobacterium abundance and low metabolites production. PC2 resulted in a decrease of other genera and an increase of metabolites studied. The relative abundance at 72h in MP was distributed over 4 genera Bifidobacterium, Lactobacillus, Dorea, and Lactococcus. Our results suggest MP as a potential prebiotic ingredient.
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Koziel JA, Frana TS, Ahn H, Glanville TD, Nguyen LT, van Leeuwen J(H. Efficacy of NH3 as a secondary barrier treatment for inactivation of Salmonella Typhimurium and methicillin-resistant Staphylococcus aureus in digestate of animal carcasses: Proof-of-concept. PLoS One 2017; 12:e0176825. [PMID: 28475586 PMCID: PMC5419515 DOI: 10.1371/journal.pone.0176825] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 04/18/2017] [Indexed: 12/14/2022] Open
Abstract
Managing the disposal of infectious animal carcasses from routine and catastrophic disease outbreaks is a global concern. Recent research suggests that burial in lined and aerated trenches provides the rapid pathogen containment provided by burial, while reducing air and water pollution potential and the length of time that land is taken out of agricultural production. Survival of pathogens in the digestate remains a concern, however. A potential answer is a 'dual'-barrier approach in which ammonia is used as a secondary barrier treatment to reduce the risk of pathogen contamination when trench liners ultimately leak. Results of this study showed that the minimum inhibitory concentration (MIC) of NH3 is 0.1 M (~1,468 NH3-N mg/L), and 0.5 M NH3 (~7,340 NH3-N mg/L) for ST4232 & MRSA43300, respectively at 24 h and pH = 9±0.1 and inactivation was increased by increasing NH3 concentration and/or treatment time. Results for digestate treated with NH3 were consistent with the MICs, and both pathogens were completely inactivated within 24 h.
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Affiliation(s)
- Jacek A. Koziel
- Dept. of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa, United States of America
- Dept. of Civil, Construction and Environmental Engineering, Iowa State University, Ames, Iowa, United States of America
- Dept. of Food Science and Human Nutrition, Iowa State University, Iowa State University, Ames, Iowa, United States of America
| | - Timothy S. Frana
- Dept. of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, Iowa, United States of America
| | - Heekwon Ahn
- Dept. of Animal Biosystems Science, Chungnam National University, Daejeon, Republic of Korea
| | - Thomas D. Glanville
- Dept. of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa, United States of America
| | - Lam T. Nguyen
- Dept. of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa, United States of America
| | - J. (Hans) van Leeuwen
- Dept. of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa, United States of America
- Dept. of Civil, Construction and Environmental Engineering, Iowa State University, Ames, Iowa, United States of America
- Dept. of Food Science and Human Nutrition, Iowa State University, Iowa State University, Ames, Iowa, United States of America
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Sokmen BB, Gumrukcuoglu N, Ugras S, Sahin H, Sagkal Y, Ugras HI. Synthesis, Antibacterial, Antiurease, and Antioxidant Activities of Some New 1,2,4-Triazole Schiff Base and Amine Derivatives. Appl Biochem Biotechnol 2014; 175:705-14. [DOI: 10.1007/s12010-014-1307-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 10/15/2014] [Indexed: 10/24/2022]
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van Heeswijk WC, Westerhoff HV, Boogerd FC. Nitrogen assimilation in Escherichia coli: putting molecular data into a systems perspective. Microbiol Mol Biol Rev 2013; 77:628-95. [PMID: 24296575 PMCID: PMC3973380 DOI: 10.1128/mmbr.00025-13] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
We present a comprehensive overview of the hierarchical network of intracellular processes revolving around central nitrogen metabolism in Escherichia coli. The hierarchy intertwines transport, metabolism, signaling leading to posttranslational modification, and transcription. The protein components of the network include an ammonium transporter (AmtB), a glutamine transporter (GlnHPQ), two ammonium assimilation pathways (glutamine synthetase [GS]-glutamate synthase [glutamine 2-oxoglutarate amidotransferase {GOGAT}] and glutamate dehydrogenase [GDH]), the two bifunctional enzymes adenylyl transferase/adenylyl-removing enzyme (ATase) and uridylyl transferase/uridylyl-removing enzyme (UTase), the two trimeric signal transduction proteins (GlnB and GlnK), the two-component regulatory system composed of the histidine protein kinase nitrogen regulator II (NRII) and the response nitrogen regulator I (NRI), three global transcriptional regulators called nitrogen assimilation control (Nac) protein, leucine-responsive regulatory protein (Lrp), and cyclic AMP (cAMP) receptor protein (Crp), the glutaminases, and the nitrogen-phosphotransferase system. First, the structural and molecular knowledge on these proteins is reviewed. Thereafter, the activities of the components as they engage together in transport, metabolism, signal transduction, and transcription and their regulation are discussed. Next, old and new molecular data and physiological data are put into a common perspective on integral cellular functioning, especially with the aim of resolving counterintuitive or paradoxical processes featured in nitrogen assimilation. Finally, we articulate what still remains to be discovered and what general lessons can be learned from the vast amounts of data that are available now.
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Weise T, Kai M, Piechulla B. Bacterial ammonia causes significant plant growth inhibition. PLoS One 2013; 8:e63538. [PMID: 23691060 PMCID: PMC3655192 DOI: 10.1371/journal.pone.0063538] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/02/2013] [Indexed: 11/19/2022] Open
Abstract
Many and complex plant-bacteria inter-relationships are found in the rhizosphere, since plants release a variety of photosynthetic exudates from their roots and rhizobacteria produce multifaceted specialized compounds including rich mixtures of volatiles, e.g., the bouquet of Serratia odorifera 4Rx13 is composed of up to 100 volatile organic and inorganic compounds. Here we show that when growing on peptone-rich nutrient medium S. odorifera 4Rx13 and six other rhizobacteria emit high levels of ammonia, which during co-cultivation in compartmented Petri dishes caused alkalization of the neighboring plant medium and subsequently reduced the growth of A. thaliana. It is argued that in nature high-protein resource degradations (carcasses, whey, manure and compost) are also accompanied by bacterial ammonia emission which alters the pH of the rhizosphere and thereby influences organismal diversity and plant-microbe interactions. Consequently, bacterial ammonia emission may be more relevant for plant colonization and growth development than previously thought.
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Affiliation(s)
- Teresa Weise
- University of Rostock, Institute of Biological Sciences, Rostock, Germany
| | - Marco Kai
- University of Rostock, Institute of Biological Sciences, Rostock, Germany
| | - Birgit Piechulla
- University of Rostock, Institute of Biological Sciences, Rostock, Germany
- * E-mail:
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Ashiralieva A, Kleiner D. Polyhalogenated benzo- and naphthoquinones are potent inhibitors of plant and bacterial ureases. FEBS Lett 2003; 555:367-70. [PMID: 14644444 DOI: 10.1016/s0014-5793(03)01289-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Polyhalogenated benzo- and naphthoquinones were found to be potent inhibitors of pure ureases from Bacillus pasteurii and Canavalia ensiformis. They also inhibited ureases in whole cells of Helicobacter pylori, Klebsiella oxytoca and Proteus mirabilis. Inhibition was non-competitive with K(i) values in the micromolar range or below. Inhibition was irreversible as shown by equilibrium dialysis. Inhibitory power decreased considerably when halogens were replaced by -OH, -CN, alkoxy or alkyl groups.
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