Trophic effect of multiple growth factors in amniotic fluid or human milk on cultured human fetal small intestinal cells
ABSTRACT To evaluate the role of growth factors in amniotic fluid and in human milk on gastrointestinal adaptation of the fetus and very low-birth-weight infants, the effects of these fluids and multiple growth factors were investigated in a human fetal small intestinal cell line (FHs 74 Int).
After FHs 74 Int cells were incubated with amniotic fluid, human milk, or recombinant growth factors, growth-promoting activity was measured by [3H]-thymidine incorporation into cells.
Incubating cells with amniotic fluid or human milk promoted growth dose dependently. Genistein almost completely inhibited growth-promoting activity in amniotic fluid P = 0.002), and growth was partially inhibited by antibodies against epidermal growth factor (EGF) (P = 0.047), insulin-like growth factor-1 (IGF-1, P = 0.047), or fibroblast growth factor (FGF, P = 0.014). This activity in human milk was inhibited almost completely by genistein (P < 0.0001) and partially inhibited by antibodies against EGF (P = 0.036), IGF-1 (P = 0.009), FGF (P = 0.004), hepatocyte growth factor (HGF, P = 0.001), or transforming growth factor-alpha (TGF-alpha, P = 0.001). Although recombinant EGF, IGF-1, FGF, HGF, and TGF-alpha elicited a synergistic trophic response on cultured cells, the response was much less than with amniotic fluid or with human milk.
In aminiotic fluid and in human milk, EGF, IGF-1, FGF, HGF, and TGF-alpha have a strong trophic effect on immature intestinal cells and may be involved in perinatal gastrointestinal adaptation.
SourceAvailable from: Nancy A Rodriguez[Show abstract] [Hide abstract]
ABSTRACT: The oropharyngeal administration of mother's milk-placing drops of milk onto the infant's oral mucosa-may serve as a preventative strategy against necrotizing enterocolitis (NEC) for extremely low-birth-weight (ELBW: birth weight <1000 g) infants. Necrotizing enterocolitis is a devastating gastrointestinal disorder which is associated with significant mortality for ELBW infants. Survivors are at risk for costly and handicapping morbidities, including severe neurological impairment. The oropharyngeal administration of mother's milk to ELBW infants may serve to expose the infant's oropharynx to protective (immune and trophic) biofactors (also present in amniotic fluid) and may protect the infant against NEC. Emerging evidence suggests that this intervention may have many benefits for extremely premature infants including protection against bacteremia, NEC, and ventilator-associated pneumonia, an earlier attainment of full enteral feeds, enhanced maturation of oral feeding skills, improved growth, and enhanced breast-feeding outcomes. While more research is needed to definitively establish safety and efficacy of this intervention, this article will examine biological plausibility and will describe the theoretical mechanisms of protection against NEC for ELBW infants who receive this intervention. Nurses play a key role in advancing the science and practice of this intervention. Future directions for research and implications for nursing practice will also be presented.The Journal of perinatal & neonatal nursing 01/2015; 29(1):81-90. DOI:10.1097/JPN.0000000000000087 · 1.01 Impact Factor
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ABSTRACT: Functional characterization of human amniotic fluid (AF) proteome, 845 proteins, has revealed that top three functions are cell proliferation, movement and differentiation, events fundamental to development, and tissue repair. Although these findings fortify the idea that AF components play roles in regeneration-like fetal wound healing, it is not known whether the components endure processing. Therefore, we processed AF and tested its effects on diabetes-impaired wound healing in an animal model. Through a germfree procedure, mature and premature AF samples were collected, respectively, from the mothers of full-term and preterm infants. Excisional wounds were generated on the dorsum of diabetic rats. Wounds were treated on day 3 and harvested on day 7 postwounding. Proliferating cell nuclear antigen and alpha-smooth muscles actin, markers for mitosis and angiogenesis, respectively, were assessed by in situ immunodetection method. Significant increases in the rate of wound closure and proliferating cell nuclear antigen-expressing cells were observed in AF-treated wounds when compared with that of sham and control wounds. Likewise, the number of large vessels was significantly increased in the wounds treated with the AF. However, population of myofibroblasts was not affected by the treatment. The mature and premature AF were almost equally effective. Our data, for the first time, show that processed AF accelerates diabetes-impaired wound healing by activating mitosis and angiogenesis, indicating that bioactive molecules in AF may endure processing. We believe that processed forms of this naturally designed "Cocktail" of bioactive molecules may have multiple clinical applications.Journal of Surgical Research 01/2014; 188(2). DOI:10.1016/j.jss.2014.01.041 · 2.12 Impact Factor
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ABSTRACT: The present study was designed to evaluate the effects of human amniotic fluid (HAF) on the growth of human corneal endothelial cells (HCECs) and to establish an in vitro method for expanding HCECs. HCECs were cultured in DMEM-F12 supplemented with 20% fetal bovine serum (FBS). Confluent monolayer cultures were trypsinized and passaged using either FBS- or HAF-containing media. Cell proliferation and cell death ELISA assays were performed to determine the effect of HAF on cell growth and viability. The identity of the cells cultured in 20% HAF was determined using immunocytochemistry (ICC) and real-time reverse transcription polymerase chain reaction (RT-PCR) techniques to evaluate the expression of factors that are characteristic of HCECs, including Ki-67, Vimentin, Na+/K+-ATPase and ZO-1. HCEC primary cultures were successfully established using 20% HAF-containing medium, and these cultures demonstrated rapid cell proliferation according to the cell proliferation and death ELISA assay results. The ICC and real time RT-PCR results indicated that there was a higher expression of Na+/K+-ATPase and ZO-1 in the 20% HAF cell cultures compared with the control (20% FBS) (P<0.05). The 20% HAF-containing medium exhibited a greater stimulatory effect on HCEC growth and could represent a potential enriched supplement for HCEC regeneration studies.Experimental Eye Research 04/2014; DOI:10.1016/j.exer.2014.04.002 · 3.02 Impact Factor