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Silva SLR, Dias IRSB, Rodrigues ACBDC, Costa RGA, Oliveira MDS, Barbosa GADC, Soares MBP, Dias RB, Valverde LF, Rocha CAG, Roy N, Park CY, Bezerra DP. Emetine induces oxidative stress, cell differentiation and NF-κB inhibition, suppressing AML stem/progenitor cells. Cell Death Discov 2024; 10:201. [PMID: 38684672 PMCID: PMC11059384 DOI: 10.1038/s41420-024-01967-8] [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: 02/21/2024] [Revised: 04/09/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024] Open
Abstract
Acute myeloid leukemia (AML) is a fatal malignancy of the blood and bone marrow. Leukemic stem cells (LSCs) are a rare subset of leukemic cells that promote the development and progression of AML, and eradication of LSCs is critical for effective control of this disease. Emetine is an FDA-approved antiparasitic drug with antitumor properties; however, little is known about its potential against LSCs. Herein, we explored the antileukemic potential of emetine, focusing on its effects on AML stem/progenitor cells. Emetine exhibited potent cytotoxic activity both in hematologic and solid cancer cells and induced AML cell differentiation. Emetine also inhibited AML stem/progenitor cells, as evidenced by decreased expression of CD34, CD97, CD99, and CD123 in KG-1a cells, indicating anti-AML stem/progenitor cell activities. The administration of emetine at a dosage of 10 mg/kg for two weeks showed no significant toxicity and significantly reduced xenograft leukemic growth in vivo. NF-κB activation was reduced in emetine-treated KG-1a cells, as shown by reduced phospho-NF-κB p65 (S529) and nuclear NF-κB p65. DNA fragmentation, YO-PRO-1 staining, mitochondrial depolarization and increased levels of active caspase-3 and cleaved PARP (Asp214) were detected in emetine-treated KG-1a cells. Moreover, treatment with the pancaspase inhibitor Z-VAD(OMe)-FMK partially prevented the apoptotic cell death induced by emetine. Emetine treatment also increased cellular and mitochondrial reactive oxygen species, and emetine-induced apoptosis in KG-1a cells was partially prevented by the antioxidant N-acetylcysteine, indicating that emetine induces apoptosis, at least in part, by inducing oxidative stress. Overall, these studies indicate that emetine is a novel potential anti-AML agent with promising activity against stem/progenitor cells, encouraging the development of further studies aimed at its clinical application.
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Affiliation(s)
- Suellen L R Silva
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Ingrid R S B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | | | - Rafaela G A Costa
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Maiara de S Oliveira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Gabriela A da C Barbosa
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- SENAI Institute for Innovation in Advanced Health Systems, SENAI CIMATEC, Salvador, BA, 41650-010, Brazil
| | - Rosane B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- Department of Propaedeutics, Federal University of Bahia (UFBA), Salvador, BA, 40301-155, Brazil
| | - Ludmila F Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
| | - Clarissa A G Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil
- Department of Propaedeutics, Federal University of Bahia (UFBA), Salvador, BA, 40301-155, Brazil
- Center for Biotechnology and Cell Therapy, D'Or Institute for Research and Education (IDOR), Salvador, BA, 41253-190, Brazil
| | - Nainita Roy
- Department of Pathology, School of Medicine, New York University, New York, NY, 10016, United States of America
| | - Christopher Y Park
- Department of Pathology, School of Medicine, New York University, New York, NY, 10016, United States of America
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, BA, 40296-710, Brazil.
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Costa RGA, Oliveira MDS, Rodrigues ACBDC, Silva SLR, Dias IRSB, Soares MBP, de Faro Valverde L, Gurgel Rocha CA, Dias RB, Bezerra DP. Bortezomib suppresses acute myelogenous leukaemia stem-like KG-1a cells via NF-κB inhibition and the induction of oxidative stress. J Cell Mol Med 2024; 28:e18333. [PMID: 38652192 PMCID: PMC11037403 DOI: 10.1111/jcmm.18333] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 02/24/2024] [Accepted: 04/04/2024] [Indexed: 04/25/2024] Open
Abstract
Acute myelogenous leukaemia (AML) originates and is maintained by leukaemic stem cells (LSCs) that are inherently resistant to antiproliferative therapies, indicating that a critical strategy for overcoming chemoresistance in AML therapy is to eradicate LSCs. In this work, we investigated the anti-AML activity of bortezomib (BTZ), emphasizing its anti-LSC potential, using KG-1a cells, an AML cell line with stem-like properties. BTZ presented potent cytotoxicity to both solid and haematological malignancy cells and reduced the stem-like features of KG-1a cells, as observed by the reduction in CD34- and CD123-positive cells. A reduction in NF-κB p65 nuclear staining was observed in BTZ-treated KG-1a cells, in addition to upregulation of the NF-κB inhibitor gene NFΚBIB. BTZ-induced DNA fragmentation, nuclear condensation, cell shrinkage and loss of transmembrane mitochondrial potential along with an increase in active caspase-3 and cleaved PARP-(Asp 214) level in KG-1a cells. Furthermore, BTZ-induced cell death was partially prevented by pretreatment with the pancaspase inhibitor Z-VAD-(OMe)-FMK, indicating that BTZ induces caspase-mediated apoptosis. BTZ also increased mitochondrial superoxide levels in KG-1a cells, and BTZ-induced apoptosis was partially prevented by pretreatment with the antioxidant N-acetylcysteine, indicating that BTZ induces oxidative stress-mediated apoptosis in KG-1a cells. At a dosage of 0.1 mg/kg every other day for 2 weeks, BTZ significantly reduced the percentage of hCD45-positive cells in the bone marrow and peripheral blood of NSG mice engrafted with KG-1a cells with tolerable toxicity. Taken together, these data indicate that the anti-LSC potential of BTZ appears to be an important strategy for AML treatment.
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Affiliation(s)
- Rafaela G. A. Costa
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
| | | | | | - Suellen L. R. Silva
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
| | - Ingrid R. S. B. Dias
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
| | - Milena B. P. Soares
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
- SENAI Institute for Innovation in Advanced Health SystemsSENAI CIMATECSalvadorBahiaBrazil
| | | | - Clarissa Araujo Gurgel Rocha
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
- Department of Propaedeutics, Faculty of DentistryFederal University of Bahia (UFBA)SalvadorBahiaBrazil
- Center for Biotechnology and Cell TherapyD'Or Institute for Research and Education (IDOR)SalvadorBahiaBrazil
| | - Rosane Borges Dias
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
- Department of Propaedeutics, Faculty of DentistryFederal University of Bahia (UFBA)SalvadorBahiaBrazil
| | - Daniel P. Bezerra
- Gonçalo Moniz InstituteOswaldo Cruz Foundation (IGM‐FIOCRUZ/BA)SalvadorBahiaBrazil
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Rodrigues ACBDC, Silva SLR, Dias IRSB, Costa RGA, Oliveira MDS, Soares MBP, Dias RB, Valverde LF, Rocha CAG, Johnson EM, Pina C, Bezerra DP. Piplartine eliminates CD34 + AML stem/progenitor cells by inducing oxidative stress and suppressing NF-κB signalling. Cell Death Discov 2024; 10:147. [PMID: 38503729 PMCID: PMC10951277 DOI: 10.1038/s41420-024-01909-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/21/2024] Open
Abstract
Acute myeloid leukaemia (AML) is a haematological malignancy characterised by the accumulation of transformed myeloid progenitors in the bone marrow. Piplartine (PL), also known as piperlongumine, is a pro-oxidant small molecule extracted from peppers that has demonstrated antineoplastic potential in solid tumours and other haematological malignancies. In this work, we explored the potential of PL to treat AML through the use of a combination of cellular and molecular analyses of primary and cultured leukaemia cells in vitro and in vivo. We showed that PL exhibits in vitro cytotoxicity against AML cells, including CD34+ leukaemia-propagating cells, but not healthy haematopoietic progenitors, suggesting anti-leukaemia selectivity. Mechanistically, PL treatment increased reactive oxygen species (ROS) levels and induced ROS-mediated apoptosis in AML cells, which could be prevented by treatment with the antioxidant scavenger N-acetyl-cysteine and the pancaspase inhibitor Z-VAD(OMe)-FMK. PL treatment reduced NFKB1 gene transcription and the level of NF-κB p65 (pS536), which was depleted from the nucleus of AML cells, indicating suppression of NF-κB p65 signalling. Significantly, PL suppressed AML development in a mouse xenograft model, and its combination with current AML treatments (cytarabine, daunorubicin and azacytidine) had synergistic effects, indicating translational therapeutic potential. Taken together, these data position PL as a novel anti-AML candidate drug that can target leukaemia stem/progenitors and is amenable to combinatorial therapeutic strategies.
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Affiliation(s)
- Ana Carolina B da C Rodrigues
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, UB8 3PH, UK
| | - Suellen L R Silva
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Ingrid R S B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Rafaela G A Costa
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Maiara de S Oliveira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- SENAI Institute for Innovation in Advanced Health Systems, SENAI CIMATEC, Salvador, Bahia, 41650-010, Brazil
| | - Rosane B Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propaedeutics and Integrated Clinical, Faculty of Dentistry, Federal University of Bahia (UFBA), Salvador, Bahia, 40301-155, Brazil
| | - Ludmila F Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Clarissa A G Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
- Department of Propaedeutics and Integrated Clinical, Faculty of Dentistry, Federal University of Bahia (UFBA), Salvador, Bahia, 40301-155, Brazil
- Center for Biotechnology and Cell Therapy, D'Or Institute for Research and Education (IDOR), Salvador, Bahia, 41253-190, Brazil
| | - Emily M Johnson
- College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, UB8 3PH, UK
| | - Cristina Pina
- College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, UB8 3PH, UK.
- Centre for Genome Engineering and Maintenance, Brunel University London, Uxbridge, UB8 3PH, UK.
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil.
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Costa RG, Silva SL, Dias IR, Oliveira MDS, Rodrigues ACBDC, Dias RB, Bezerra DP. Emerging drugs targeting cellular redox homeostasis to eliminate acute myeloid leukemia stem cells. Redox Biol 2023; 62:102692. [PMID: 37031536 PMCID: PMC10119960 DOI: 10.1016/j.redox.2023.102692] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/28/2023] [Accepted: 03/29/2023] [Indexed: 04/05/2023] Open
Abstract
Acute myeloid leukemia (AML) is a very heterogeneous group of disorders with large differences in the percentage of immature blasts that presently are classified according to the specific mutations that trigger malignant proliferation among thousands of mutations reported thus far. It is an aggressive disease for which few targeted therapies are available and still has a high recurrence rate and low overall survival. The main reason for AML relapse is believed to be due to leukemic stem cells (LSCs) that have unlimited self-renewal capacity and long residence in a quiescent state, which promote greater resistance to traditional therapies for this cancer. AML LSCs have low oxidative stress levels, which appear to be caused by a combination of low mitochondrial activity and high activity of ROS-removing pathways. In this sense, oxidative stress has been thought to be an important new potential target for the treatment of AML patients, targeting the eradication of AML LSCs. The aim of this review is to discuss some drugs that induce oxidative stress to direct new goals for future research focusing on redox imbalance as an effective strategy to eliminate AML LSCs.
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Oliveira MDS, Barbosa MIF, de Souza TB, Moreira DRM, Martins FT, Villarreal W, Machado RP, Doriguetto AC, Soares MBP, Bezerra DP. A novel platinum complex containing a piplartine derivative exhibits enhanced cytotoxicity, causes oxidative stress and triggers apoptotic cell death by ERK/p38 pathway in human acute promyelocytic leukemia HL-60 cells. Redox Biol 2018; 20:182-194. [PMID: 30359932 PMCID: PMC6198128 DOI: 10.1016/j.redox.2018.10.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/02/2018] [Accepted: 10/08/2018] [Indexed: 12/19/2022] Open
Abstract
Piplartine (piperlongumine) is a plant-derived compound found in some Piper species that became a novel potential antineoplastic agent. In the present study, we synthesized a novel platinum complex containing a piplartine derivative cis-[PtCl(PIP-OH)(PPh3)2]PF6 (where, PIP-OH = piplartine demethylated derivative; and PPh3 = triphenylphosphine) with enhanced cytotoxicity in different cancer cells, and investigated its apoptotic action in human promyelocytic leukemia HL-60 cells. The structure of PIP-OH ligand was characterized by X-ray crystallographic analysis and the resulting platinum complex was characterized by infrared, molar conductance measurements, elemental analysis and NMR experiments. We found that the complex is more potent than piplartine in a panel of cancer cell lines. Apoptotic cell morphology, increased internucleosomal DNA fragmentation, without cell membrane permeability, loss of the mitochondrial transmembrane potential, increased phosphatidylserine externalization and caspase-3 activation were observed in complex-treated HL-60 cells. Treatment with the complex also caused a marked increase in the production of reactive oxygen species (ROS), and the pretreatment with N-acetyl-L-cysteine, an antioxidant, reduced the complex-induced apoptosis, indicating activation of ROS-mediated apoptosis pathway. Important, pretreatment with a p38 MAPK inhibitor (PD 169316) and MEK inhibitor (U-0126), known to inhibit ERK1/2 activation, also prevented the complex-induced apoptosis. The complex did not induce DNA intercalation in cell-free DNA assays. In conclusion, the complex exhibits more potent cytotoxicity than piplartine in a panel of different cancer cells and triggers ROS/ERK/p38-mediated apoptosis in HL-60 cells.
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Affiliation(s)
- Maiara de S Oliveira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, Bahia, Brazil
| | - Marília I F Barbosa
- Institute of Chemistry, Federal University of Alfenas, Alfenas 37133-840, Minas Gerais, Brazil
| | - Thiago Belarmino de Souza
- Department of Pharmacy, Federal University of Ouro Preto, Ouro Preto 35400-000, Minas Gerais, Brazil
| | - Diogo R M Moreira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, Bahia, Brazil
| | - Felipe Terra Martins
- Institute of Chemistry, Federal University of Goiás, Goiânia 740011970, Goiás, Brazil
| | - Wilmer Villarreal
- Department of Chemistry, Federal University of São Carlos, São Carlos 13565-905, São Paulo, Brazil
| | - Rafael P Machado
- Institute of Chemistry, Federal University of Alfenas, Alfenas 37133-840, Minas Gerais, Brazil
| | | | - Milena B P Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, Bahia, Brazil; Center of Biotechnology and Cell Therapy, Hospital São Rafael, Salvador, Bahia 41253-190, Brazil
| | - Daniel P Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, Bahia, Brazil.
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Freitas JE, Takiya CS, Del Valle TA, Barletta RV, Venturelli BC, Vendramini THA, Mingoti RD, Calomeni GD, Gardinal R, Gandra JR, Bettero VP, Ferreira de Jesus E, Oliveira MDS, Rennó FP. Ruminal biohydrogenation and abomasal flow of fatty acids in lactating cows fed diets supplemented with soybean oil, whole soybeans, or calcium salts of fatty acids. J Dairy Sci 2018; 101:7881-7891. [PMID: 30007815 DOI: 10.3168/jds.2017-13666] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 04/13/2018] [Indexed: 12/17/2023]
Abstract
Ruminants have a unique metabolism and digestion of unsaturated fatty acids (UFA). Unlike monogastric animals, the fatty acid (FA) profile ingested by ruminants is not the same as that reaching the small intestine. The objective of this study was to evaluate whole raw soybeans (WS) in diets as a replacer for calcium salts of fatty acids (CSFA) in terms of UFA profile in the abomasal digesta of early- to mid-lactation cows. Eight Holstein cows (80 ± 20 d in milk, 22.9 ± 0.69 kg/d of milk yield, and 580 ± 20 kg of body weight; mean ± standard deviation) with ruminal and abomasal cannulas were used in a 4 × 4 Latin square experiment with 22-d periods. The experiment evaluated different fat sources rich in linoleic acid on ruminal kinetics, ruminal fermentation, FA abomasal flow, and milk FA profile of cows assigned to treatment sequences containing a control (CON), with no fat source; soybean oil, added at 2.68% of diet dry matter (DM); WS, addition of WS at 14.3% of diet DM; and CSFA, addition of CSFA at 2.68% of diet DM. Dietary fat supplementation had no effect on nutrient intake and digestibility, with the exception of ether extract. Cows fed fat sources tended to have lower milk fat concentration than those fed CON. In general, diets containing fat sources tended to decrease ruminal neutral detergent fiber digestibility in relation to CON. Cows fed WS had lower ruminal digestibility of DM and higher abomasal flow of DM in comparison to cows fed CSFA. As expected, diets containing fat supplements increased FA abomasal flow of C18:0 and total FA. Cows fed WS tended to present a higher concentration of UFA in milk when compared with those fed CSFA. This study suggests that under some circumstances, abomasal flow of UFA in early lactation cows can be increased by supplementing their diet with fat supplements rich in linoleic acid, regardless of rumen protection, with small effects on ruminal DM digestibility.
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Affiliation(s)
- J E Freitas
- Department of Animal Science, Federal University of Bahia, Salvador, Brazil, 0170-110
| | - C S Takiya
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - T A Del Valle
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R V Barletta
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - B C Venturelli
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - T H A Vendramini
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R D Mingoti
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - G D Calomeni
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R Gardinal
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - J R Gandra
- Department of Animal Science, Federal University of Grande Dourados, Dourados, Brazil, 79825-070
| | - V P Bettero
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - E Ferreira de Jesus
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - M D S Oliveira
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - F P Rennó
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900.
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