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Tesema SK, Stafford WH, Laird W, Davidson JM, Talati AJ. Risk factors for early death in neonates diagnosed with necrotizing enterocolitis. Am J Med Sci 2023. [DOI: 10.1016/s0002-9629(23)00466-4] [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: 01/28/2023]
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Laird W, Tesema SK, Stafford WH, Davidson JM, Talati AJ. Single center experience with post-nec strictues over a 3-year period. Am J Med Sci 2023. [DOI: 10.1016/s0002-9629(23)00343-9] [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: 01/28/2023]
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Davidson JM, Ferguson J, Ivey E, Philip R, Weems MF, Talati AJ. A randomized trial of intravenous acetaminophen versus indomethacin for treatment of hemodynamically significant PDAs in VLBW infants. J Perinatol 2021; 41:93-99. [PMID: 32439957 DOI: 10.1038/s41372-020-0694-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/20/2020] [Accepted: 05/11/2020] [Indexed: 11/09/2022]
Abstract
Objective was to compare the rate of successful treatment of hsPDA based on echocardiogram criteria after use of IV acetaminophen or IV indomethacin in very low-birthweight infants. The study was a multi-center, randomized controlled trial. Infants born prior to 32 weeks with birthweight ≤ 1500 g were included if PDA treatment was indicated within the 21 days after birth. hsPDA was defined by strict echocardiogram criteria. Eligible infants were randomized to treatment with either IV acetaminophen or IV indomethacin. Of 86 eligible infants, 17 infants were randomized to acetaminophen and 20 to indomethacin. One (5.9%) hsPDA in the acetaminophen group had successful treatment compared to 11 (55%) in the indomethacin group (p = 0.002). Eight (47%) in the acetaminophen group and 3 (15%) in the indomethacin group received transcatheter PDA closure (p = 0.07). IV indomethacin was more effective than IV acetaminophen for treatment of hsPDAs. More infants in the acetaminophen group received transcatheter closure.
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Affiliation(s)
- J M Davidson
- University of Tennessee Health Science Center, Memphis, TN, USA. .,Regional One Health, Memphis, TN, USA. .,Lebonheur Children's Hospital, Memphis, TN, USA.
| | - J Ferguson
- University of Tennessee Health Science Center, Memphis, TN, USA.,Lebonheur Children's Hospital, Memphis, TN, USA
| | - E Ivey
- Mednax/Germantown Hospital, Germantown, TN, USA
| | - R Philip
- University of Tennessee Health Science Center, Memphis, TN, USA.,Lebonheur Children's Hospital, Memphis, TN, USA
| | - M F Weems
- University of Tennessee Health Science Center, Memphis, TN, USA.,Regional One Health, Memphis, TN, USA.,Lebonheur Children's Hospital, Memphis, TN, USA
| | - A J Talati
- University of Tennessee Health Science Center, Memphis, TN, USA.,Regional One Health, Memphis, TN, USA.,Lebonheur Children's Hospital, Memphis, TN, USA
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Frazier KJ, Brinkmann KC, Talati AJ, English BK. 212 ROLE OF BACTERIAL SURFACE PROTEIN SPB1 IN THE MACROPHAGE INFLAMMATORY RESPONSE TO ANTIBIOTIC-TREATED GROUP B STREPTOCOCCI. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-765] [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: 11/04/2022]
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Wright CT, Brinkmann KC, Talati AJ, English BK. 210 ROLE OF THE BETA-HEMOLYSIN IN MACROPHAGE ACTIVATION BY GROUP B STREPTOCOCCI EXPOSED TO BETA-LACTAM ANTIBIOTICS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-763] [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: 11/04/2022]
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Talati AJ, English BK. 211 ROLE OF BACTERIAL DNA IN MACROPHAGE ACTIVATION BY GROUP B STREPTOCOCCI. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-764] [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: 11/04/2022]
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Talati AJ, Crouse DT, English BK, Newman C, Harrison L, Meals E. Immunomodulation by exogenous surfactant: effect on TNF-alpha secretion and luminol-enhanced chemiluminescence activity by murine macrophages stimulated with group B streptococci. Microbes Infect 2001; 3:267-73. [PMID: 11334743 DOI: 10.1016/s1286-4579(01)01379-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Group B streptococci (GBS) are important pathogens in neonatal sepsis and pneumonia. GBS stimulate alveolar macrophages to produce inflammatory cytokines and free oxygen radicals, which can damage the lungs. In several studies, use of exogenous surfactant in term babies has improved outcome related to sepsis and respiratory failure. The role(s) of exogenous surfactant in modulating the inflammatory response produced by this microbe was examined. Tumor necrosis factor alpha (TNF-alpha) production and luminol-enhanced chemiluminescence (LCL), a measure of respiratory burst, were investigated. For measuring TNF-alpha release, RAW 264.7 murine macrophages were pre-incubated with bovine surfactant and stimulated with either lipopolysaccharide, live or heat-killed GBS type Ia. LCL was measured after macrophages were pre-incubated with or without surfactant overnight, then stimulated with GBS or phorbol myristate acetate. Lipopolysaccharide and GBS stimulated TNF-alpha secretion from macrophages that was suppressed by exogenous surfactant in a dose-dependent fashion. GBS and phorbol myristate acetate also increased LCL from macrophages, which was significantly suppressed by pre-incubation of macrophages with exogenous surfactant. We conclude that GBS type Ia stimulates TNF-alpha release and LCL from RAW 264.7 cells and that these responses are suppressed by surfactant. Suppression of inflammatory mediators by exogenous surfactant might improve respiratory disease associated with GBS.
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Affiliation(s)
- A J Talati
- Department of Pediatrics, The University of Tennessee, Memphis, TN, USA.
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Abstract
Constricting effect of indomethacin on the ductus arteriosus of the fetus is well known. The fetal effects of other nonsteroid anti-inflammatory drugs (NSAIDs) like naproxen are not well reported. We report here a case of a 3,790-g term neonate who developed persistent pulmonary hypertension after birth with a closed ductus arteriosus. The mother admitted to taking naproxen sodium immediately prior to the birth of the infant. The course of illness was progressively better on conservative management. Like indomethacin, other NSAIDs can also cause premature closure of fetal ductus arteriosus, pulmonary hypertension, and life-threatening problems to the neonate. Patient education regarding over-the-counter pain medication during pregnancy should be emphasized.
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Affiliation(s)
- A J Talati
- Department of Pediatrics, The University of Tennessee, Memphis, USA
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Talati AJ, Crouse DT, English BK, Newman C, Livingston L, Meals E. Exogenous bovine surfactant suppresses tumor necrosis factor-alpha release by murine macrophages stimulated by genital mycoplasmas. J Infect Dis 1998; 178:1122-5. [PMID: 9806043 DOI: 10.1086/515695] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Tumor necrosis factor-alpha (TNF-alpha) is a proinflammatory cytokine that appears to play a significant role in the development of neonatal chronic lung disease (CLD). Inflammation and CLD are also associated with respiratory tract colonization with genital mycoplasmas. The possible protective roles of surfactant in mitigating the inflammatory response to these microbes were investigated. Murine RAW 264.7 macrophages were preincubated with an exogenous surfactant and exposed overnight to sterile media, lipopolysaccharide (LPS), Mycoplasma hominis, or Ureaplasma urealyticum. Macrophages released TNF-alpha in response to challenge with LPS, U. urealyticum, and M. hominis in a concentration-dependent fashion. Surfactant suppressed LPS and M. hominis induced TNF-alpha production in a dose-dependent manner but suppressed U. urealyticum-mediated TNF-alpha production only at the higher dose tested. Similar effects were seen in hyperoxia (95% O2). Thus, exogenous bovine surfactant significantly inhibits the production of TNF-alpha by murine macrophages stimulated with genital mycoplasmas and bacterial LPS.
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Affiliation(s)
- A J Talati
- Department of Pediatrics, University of Tennessee, Memphis, USA
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