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Papers by angela maynor

Research paper thumbnail of Relation Between Serum Insulinlike Growth Factor-1, Insulinlike Growth Factor Binding Protein-2, and Insulinlike Growth Factor Binding Protein-3 and Nutritional Intake in Premature Infants With Bronchopulmonary Dysplasia

Journal of Pediatric Gastroenterology and Nutrition, May 1, 2001

Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to... more Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to assess the adequacy of nutritional intake in premature infants with chronic lung disease bronchopulmonary dysplasia (BPD) was assessed. Methods: Twenty-nine premature infants had serial measurements taken of their serum IGF-1, insulinlike growth factor binding protein (IGFBP)-2, and IGFBP-3 concentrations between 2 and 6 weeks of age. Regression analyses were used to examine the relation between nutritional parameters and IGF-1, IGFBP-2, and IGFBP-3 concentrations in premature infants with and without BPD. Results: The group of infants with BPD (n ‫ס‬ 12) did not differ from infants without BPD (n ‫ס‬ 17) in gestational age or weight at entry, but gained less weight during the study period. In infants without BPD, IGF-1 correlated positively with protein intake (r ‫ס‬ 0.50) and caloric intake (r ‫ס‬ 0.41) over the 3 days before sample collection and with weight change over the previous week (r ‫ס‬ 0.46). In contrast, infants with BPD showed a significant correlation between IGF-1 and weight change (r ‫ס‬ 0.54) only. There was a significant negative correlation between IGFBP-2 and protein intake in infants without BPD (r ‫ס‬ −0.50) and in infants with BPD (r ‫ס‬ −0.41). Negative correlations between IGFBP-2 and both weight change (r ‫ס‬ −0.64) and caloric intake (r ‫ס‬ −0.43) over the previous week were found only in the group of infants without BPD. IGFBP-3 correlated positively with weight changes and protein intake in both groups but correlated with caloric intake only in the group without BPD. Multiple regression analyses were used to determine significant independent variables associated with IGF-1, IGFBP-2, and IGFBP-3. In infants without BPD, significant independent predictors of IGFBP-2 were 7-day weight change and 2-day protein intake; 3-day caloric intake was the only significant independent predictor for IGFBP-3. For infants with BPD, 3-day weight gain was the only independent variable associated with serum IGF-1. Protein intake in the week before sample collection was an independent predictor of IGFBP-2 and 3-day weight change and 2-day protein intake were independent predictors of IGFBP-3. Conclusions: These results confirm that changes in serum IGF-1, IGFBP-2, and IGFBP-3 reflect the nutritional status of premature infants and demonstrate that the relation between these proteins and nutritional intake differs in premature infants with and without BPD. Refinement of these observations by future studies may permit a more accurate determination of the protein and caloric intake sufficient for growth and repair after injury in premature infants with lung disease.

Research paper thumbnail of Reduced serum amino acid concentrations in infants with necrotizing enterocolitis

The Journal of Pediatrics, Dec 1, 2000

ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective... more ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective: To determine whether premature infants who have necrotizing enterocolitis (NEC) have deficiencies in glutamine (GLN) and arginine (ARG), which are essential to intestinal integrity. Study design: A 4-month prospective cohort study of serum amino acid and urea levels in premature infants was done. Serum amino acid and urea levels were measured by high-pressure liquid chromatography and enzymatic methods, respectively, on samples obtained on days of life 3, 7, 14, and 21. Results: Infants in the control (n = 32) and NEC groups (n = 13) were comparable for birth weight, gestational age, and Apgar scores. NEC began on mean day of life 14.5 (95% CI, day of life 11 to 18). Median values of GLN were 37% to 57% lower in the NEC group on days 7, 14, and 21 compared with those in the control group (P < .05). On days 7 and 14, median values of ARG, GLN, alanine, lysine, ornithine, and threonine were decreased 36% to 67% (P < .05) in the NEC group. Total nonessential amino and total essential amino acids were 35% to 50% lower in the NEC group on days 7 and 14 (P < .05). Infants in the NEC group had significant reductions in GLN and ARG 7 days before the onset of NEC. Conclusions: Infants who have NEC have selective amino acid deficiencies including reduced levels of GLN and ARG that may predispose to the illness.

Research paper thumbnail of Serum citruline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

The Journal of Pediatrics, 2005

Research paper thumbnail of Iconography : Serum citrulline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

Data Revues 00223476 V146i4 S002234760401193x, Aug 15, 2011

Research paper thumbnail of Serum citrulline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

The Journal of Pediatrics, 2005

To determine if serum levels of CIT (a nonprotein amino acid synthesized by the intestine) correl... more To determine if serum levels of CIT (a nonprotein amino acid synthesized by the intestine) correlate with total parenteral nutrition (PN)-independence in children with short bowel syndrome (SBS). We prospectively obtained serum amino acid profiles over a 24-month interval from all infants with SBS 3 weeks to 4 years of age. Remaining small intestine length was recorded at surgery, and percent enteral calories tolerated (enteral calories divided by enteral plus parenteral calories x 100) was determined in 24 infants with SBS and 21 age-matched controls (blood drawn for non-gastrointestinal symptoms). Mean CIT for controls was 31 +/- 2 micromol/L. In patients with SBS (n = 24), serum CIT correlated linearly with percent enteral calories (R = 0.85; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;.001) and with bowel length (R = 0.47; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; or =.03). CIT level in patients with SBS weaned off PN was 30 +/- 2 micromol/L; in those subsequently weaned off PN, 20 +/- 2 micromol/L; and in those who would remain PN-dependent, 11 +/- 2 micromol/L ( P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; or =.01). Serum CIT &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; or =19 micromol/L had 94% sensitivity and 67% specificity for being off or coming off total PN. Serum CIT level &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;19 micromol/L in children with SBS is associated with development of enteral tolerance and may be a useful predictive test.

Research paper thumbnail of Reduced serum amino acid concentrations in infants with necrotizing enterocolitis

The Journal of Pediatrics, 2000

ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective... more ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective: To determine whether premature infants who have necrotizing enterocolitis (NEC) have deficiencies in glutamine (GLN) and arginine (ARG), which are essential to intestinal integrity. Study design: A 4-month prospective cohort study of serum amino acid and urea levels in premature infants was done. Serum amino acid and urea levels were measured by high-pressure liquid chromatography and enzymatic methods, respectively, on samples obtained on days of life 3, 7, 14, and 21. Results: Infants in the control (n = 32) and NEC groups (n = 13) were comparable for birth weight, gestational age, and Apgar scores. NEC began on mean day of life 14.5 (95% CI, day of life 11 to 18). Median values of GLN were 37% to 57% lower in the NEC group on days 7, 14, and 21 compared with those in the control group (P < .05). On days 7 and 14, median values of ARG, GLN, alanine, lysine, ornithine, and threonine were decreased 36% to 67% (P < .05) in the NEC group. Total nonessential amino and total essential amino acids were 35% to 50% lower in the NEC group on days 7 and 14 (P < .05). Infants in the NEC group had significant reductions in GLN and ARG 7 days before the onset of NEC. Conclusions: Infants who have NEC have selective amino acid deficiencies including reduced levels of GLN and ARG that may predispose to the illness.

Research paper thumbnail of Relation Between Serum Insulinlike Growth Factor-1, Insulinlike Growth Factor Binding Protein-2, and Insulinlike Growth Factor Binding Protein-3 and Nutritional Intake in Premature Infants With Bronchopulmonary Dysplasia

Journal of Pediatric Gastroenterology and Nutrition, 2001

Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to... more Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to assess the adequacy of nutritional intake in premature infants with chronic lung disease bronchopulmonary dysplasia (BPD) was assessed. Methods: Twenty-nine premature infants had serial measurements taken of their serum IGF-1, insulinlike growth factor binding protein (IGFBP)-2, and IGFBP-3 concentrations between 2 and 6 weeks of age. Regression analyses were used to examine the relation between nutritional parameters and IGF-1, IGFBP-2, and IGFBP-3 concentrations in premature infants with and without BPD. Results: The group of infants with BPD (n ‫ס‬ 12) did not differ from infants without BPD (n ‫ס‬ 17) in gestational age or weight at entry, but gained less weight during the study period. In infants without BPD, IGF-1 correlated positively with protein intake (r ‫ס‬ 0.50) and caloric intake (r ‫ס‬ 0.41) over the 3 days before sample collection and with weight change over the previous week (r ‫ס‬ 0.46). In contrast, infants with BPD showed a significant correlation between IGF-1 and weight change (r ‫ס‬ 0.54) only. There was a significant negative correlation between IGFBP-2 and protein intake in infants without BPD (r ‫ס‬ −0.50) and in infants with BPD (r ‫ס‬ −0.41). Negative correlations between IGFBP-2 and both weight change (r ‫ס‬ −0.64) and caloric intake (r ‫ס‬ −0.43) over the previous week were found only in the group of infants without BPD. IGFBP-3 correlated positively with weight changes and protein intake in both groups but correlated with caloric intake only in the group without BPD. Multiple regression analyses were used to determine significant independent variables associated with IGF-1, IGFBP-2, and IGFBP-3. In infants without BPD, significant independent predictors of IGFBP-2 were 7-day weight change and 2-day protein intake; 3-day caloric intake was the only significant independent predictor for IGFBP-3. For infants with BPD, 3-day weight gain was the only independent variable associated with serum IGF-1. Protein intake in the week before sample collection was an independent predictor of IGFBP-2 and 3-day weight change and 2-day protein intake were independent predictors of IGFBP-3. Conclusions: These results confirm that changes in serum IGF-1, IGFBP-2, and IGFBP-3 reflect the nutritional status of premature infants and demonstrate that the relation between these proteins and nutritional intake differs in premature infants with and without BPD. Refinement of these observations by future studies may permit a more accurate determination of the protein and caloric intake sufficient for growth and repair after injury in premature infants with lung disease.

Research paper thumbnail of Failure to Imbibe in Otherwise Normal Infants

Journal of Pediatric Gastroenterology and Nutrition, 2000

Research paper thumbnail of Early Administration of Oropharyngeal Colostrum to Extremely Low Birth Weight Infants

Breastfeeding Medicine, 2013

Background: Human milk reduces morbidities in extremely low birth weight (ELBW) infants. However,... more Background: Human milk reduces morbidities in extremely low birth weight (ELBW) infants. However, clinical instability often precludes ELBW infants from receiving early enteral feeds. This study compared clinical outcomes before and after implementing an oropharyngeal colostrum (COL) protocol in a cohort of inborn (born at our facility) ELBW infants. Study Design: This is a retrospective cohort study of inborn ELBW infants admitted to the Duke Intensive Care Nursery from January 2007 to September 2011. In November 2010, we initiated a COL protocol for infants not enterally fed whose mothers were providing breastmilk. Infants received 0.1 mL of fresh COL to each cheek every 4 hours for 5 days beginning in the first 48 postnatal hours. We assessed demographics, diagnoses, feeding history, and mortality and for the presence of medical necrotizing enterocolitis (NEC), surgical NEC, and spontaneous perforation. Between-group comparisons were made using Fisher's exact test or Wilcoxon rank sum testing where appropriate. Results: Of the 369 infants included, 280 (76%) were born prior to the COL protocol (Pre-COL Cohort [PCC]), and 89 (24%) were born after (COL Cohort [CC]). Mortality and the percentage of infants with surgical NEC and spontaneous perforations were statistically similar between the groups. The CC weighed an average (interquartile range) of 1,666 (1,399, 1,940) g at 36 weeks versus 1,380 (1,190, 1,650) g for the PCC (p < 0.001). In a multivariable analysis with birth weight as a covariable, weight at 36 weeks was significantly greater (37 g; p < 0.01). Conclusions: Initiating oropharyngeal COL in ELBW infants in the first 2 postnatal days appears feasible and safe and may be nutritionally beneficial. Further research is needed to determine if early COL administration reduces neonatal morbidity and mortality.

Research paper thumbnail of Failure to Imbibe in Otherwise Normal Infants

Journal of Pediatric Gastroenterology and Nutrition, Apr 1, 2000

Research paper thumbnail of Relation Between Serum Insulinlike Growth Factor-1, Insulinlike Growth Factor Binding Protein-2, and Insulinlike Growth Factor Binding Protein-3 and Nutritional Intake in Premature Infants With Bronchopulmonary Dysplasia

Journal of Pediatric Gastroenterology and Nutrition, May 1, 2001

Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to... more Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to assess the adequacy of nutritional intake in premature infants with chronic lung disease bronchopulmonary dysplasia (BPD) was assessed. Methods: Twenty-nine premature infants had serial measurements taken of their serum IGF-1, insulinlike growth factor binding protein (IGFBP)-2, and IGFBP-3 concentrations between 2 and 6 weeks of age. Regression analyses were used to examine the relation between nutritional parameters and IGF-1, IGFBP-2, and IGFBP-3 concentrations in premature infants with and without BPD. Results: The group of infants with BPD (n ‫ס‬ 12) did not differ from infants without BPD (n ‫ס‬ 17) in gestational age or weight at entry, but gained less weight during the study period. In infants without BPD, IGF-1 correlated positively with protein intake (r ‫ס‬ 0.50) and caloric intake (r ‫ס‬ 0.41) over the 3 days before sample collection and with weight change over the previous week (r ‫ס‬ 0.46). In contrast, infants with BPD showed a significant correlation between IGF-1 and weight change (r ‫ס‬ 0.54) only. There was a significant negative correlation between IGFBP-2 and protein intake in infants without BPD (r ‫ס‬ −0.50) and in infants with BPD (r ‫ס‬ −0.41). Negative correlations between IGFBP-2 and both weight change (r ‫ס‬ −0.64) and caloric intake (r ‫ס‬ −0.43) over the previous week were found only in the group of infants without BPD. IGFBP-3 correlated positively with weight changes and protein intake in both groups but correlated with caloric intake only in the group without BPD. Multiple regression analyses were used to determine significant independent variables associated with IGF-1, IGFBP-2, and IGFBP-3. In infants without BPD, significant independent predictors of IGFBP-2 were 7-day weight change and 2-day protein intake; 3-day caloric intake was the only significant independent predictor for IGFBP-3. For infants with BPD, 3-day weight gain was the only independent variable associated with serum IGF-1. Protein intake in the week before sample collection was an independent predictor of IGFBP-2 and 3-day weight change and 2-day protein intake were independent predictors of IGFBP-3. Conclusions: These results confirm that changes in serum IGF-1, IGFBP-2, and IGFBP-3 reflect the nutritional status of premature infants and demonstrate that the relation between these proteins and nutritional intake differs in premature infants with and without BPD. Refinement of these observations by future studies may permit a more accurate determination of the protein and caloric intake sufficient for growth and repair after injury in premature infants with lung disease.

Research paper thumbnail of Reduced serum amino acid concentrations in infants with necrotizing enterocolitis

The Journal of Pediatrics, Dec 1, 2000

ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective... more ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective: To determine whether premature infants who have necrotizing enterocolitis (NEC) have deficiencies in glutamine (GLN) and arginine (ARG), which are essential to intestinal integrity. Study design: A 4-month prospective cohort study of serum amino acid and urea levels in premature infants was done. Serum amino acid and urea levels were measured by high-pressure liquid chromatography and enzymatic methods, respectively, on samples obtained on days of life 3, 7, 14, and 21. Results: Infants in the control (n = 32) and NEC groups (n = 13) were comparable for birth weight, gestational age, and Apgar scores. NEC began on mean day of life 14.5 (95% CI, day of life 11 to 18). Median values of GLN were 37% to 57% lower in the NEC group on days 7, 14, and 21 compared with those in the control group (P < .05). On days 7 and 14, median values of ARG, GLN, alanine, lysine, ornithine, and threonine were decreased 36% to 67% (P < .05) in the NEC group. Total nonessential amino and total essential amino acids were 35% to 50% lower in the NEC group on days 7 and 14 (P < .05). Infants in the NEC group had significant reductions in GLN and ARG 7 days before the onset of NEC. Conclusions: Infants who have NEC have selective amino acid deficiencies including reduced levels of GLN and ARG that may predispose to the illness.

Research paper thumbnail of Serum citruline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

The Journal of Pediatrics, 2005

Research paper thumbnail of Iconography : Serum citrulline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

Data Revues 00223476 V146i4 S002234760401193x, Aug 15, 2011

Research paper thumbnail of Serum citrulline levels correlate with enteral tolerance and bowel length in infants with short bowel syndrome

The Journal of Pediatrics, 2005

To determine if serum levels of CIT (a nonprotein amino acid synthesized by the intestine) correl... more To determine if serum levels of CIT (a nonprotein amino acid synthesized by the intestine) correlate with total parenteral nutrition (PN)-independence in children with short bowel syndrome (SBS). We prospectively obtained serum amino acid profiles over a 24-month interval from all infants with SBS 3 weeks to 4 years of age. Remaining small intestine length was recorded at surgery, and percent enteral calories tolerated (enteral calories divided by enteral plus parenteral calories x 100) was determined in 24 infants with SBS and 21 age-matched controls (blood drawn for non-gastrointestinal symptoms). Mean CIT for controls was 31 +/- 2 micromol/L. In patients with SBS (n = 24), serum CIT correlated linearly with percent enteral calories (R = 0.85; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;.001) and with bowel length (R = 0.47; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; or =.03). CIT level in patients with SBS weaned off PN was 30 +/- 2 micromol/L; in those subsequently weaned off PN, 20 +/- 2 micromol/L; and in those who would remain PN-dependent, 11 +/- 2 micromol/L ( P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; or =.01). Serum CIT &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; or =19 micromol/L had 94% sensitivity and 67% specificity for being off or coming off total PN. Serum CIT level &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt;19 micromol/L in children with SBS is associated with development of enteral tolerance and may be a useful predictive test.

Research paper thumbnail of Reduced serum amino acid concentrations in infants with necrotizing enterocolitis

The Journal of Pediatrics, 2000

ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective... more ARG Arginine GLN Glutamine NEC Necrotizing enterocolitis TPN Total parenteral nutrition Objective: To determine whether premature infants who have necrotizing enterocolitis (NEC) have deficiencies in glutamine (GLN) and arginine (ARG), which are essential to intestinal integrity. Study design: A 4-month prospective cohort study of serum amino acid and urea levels in premature infants was done. Serum amino acid and urea levels were measured by high-pressure liquid chromatography and enzymatic methods, respectively, on samples obtained on days of life 3, 7, 14, and 21. Results: Infants in the control (n = 32) and NEC groups (n = 13) were comparable for birth weight, gestational age, and Apgar scores. NEC began on mean day of life 14.5 (95% CI, day of life 11 to 18). Median values of GLN were 37% to 57% lower in the NEC group on days 7, 14, and 21 compared with those in the control group (P < .05). On days 7 and 14, median values of ARG, GLN, alanine, lysine, ornithine, and threonine were decreased 36% to 67% (P < .05) in the NEC group. Total nonessential amino and total essential amino acids were 35% to 50% lower in the NEC group on days 7 and 14 (P < .05). Infants in the NEC group had significant reductions in GLN and ARG 7 days before the onset of NEC. Conclusions: Infants who have NEC have selective amino acid deficiencies including reduced levels of GLN and ARG that may predispose to the illness.

Research paper thumbnail of Relation Between Serum Insulinlike Growth Factor-1, Insulinlike Growth Factor Binding Protein-2, and Insulinlike Growth Factor Binding Protein-3 and Nutritional Intake in Premature Infants With Bronchopulmonary Dysplasia

Journal of Pediatric Gastroenterology and Nutrition, 2001

Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to... more Background: The usefulness of serum insulinlike growth factor (IGF)-system-peptide measurement to assess the adequacy of nutritional intake in premature infants with chronic lung disease bronchopulmonary dysplasia (BPD) was assessed. Methods: Twenty-nine premature infants had serial measurements taken of their serum IGF-1, insulinlike growth factor binding protein (IGFBP)-2, and IGFBP-3 concentrations between 2 and 6 weeks of age. Regression analyses were used to examine the relation between nutritional parameters and IGF-1, IGFBP-2, and IGFBP-3 concentrations in premature infants with and without BPD. Results: The group of infants with BPD (n ‫ס‬ 12) did not differ from infants without BPD (n ‫ס‬ 17) in gestational age or weight at entry, but gained less weight during the study period. In infants without BPD, IGF-1 correlated positively with protein intake (r ‫ס‬ 0.50) and caloric intake (r ‫ס‬ 0.41) over the 3 days before sample collection and with weight change over the previous week (r ‫ס‬ 0.46). In contrast, infants with BPD showed a significant correlation between IGF-1 and weight change (r ‫ס‬ 0.54) only. There was a significant negative correlation between IGFBP-2 and protein intake in infants without BPD (r ‫ס‬ −0.50) and in infants with BPD (r ‫ס‬ −0.41). Negative correlations between IGFBP-2 and both weight change (r ‫ס‬ −0.64) and caloric intake (r ‫ס‬ −0.43) over the previous week were found only in the group of infants without BPD. IGFBP-3 correlated positively with weight changes and protein intake in both groups but correlated with caloric intake only in the group without BPD. Multiple regression analyses were used to determine significant independent variables associated with IGF-1, IGFBP-2, and IGFBP-3. In infants without BPD, significant independent predictors of IGFBP-2 were 7-day weight change and 2-day protein intake; 3-day caloric intake was the only significant independent predictor for IGFBP-3. For infants with BPD, 3-day weight gain was the only independent variable associated with serum IGF-1. Protein intake in the week before sample collection was an independent predictor of IGFBP-2 and 3-day weight change and 2-day protein intake were independent predictors of IGFBP-3. Conclusions: These results confirm that changes in serum IGF-1, IGFBP-2, and IGFBP-3 reflect the nutritional status of premature infants and demonstrate that the relation between these proteins and nutritional intake differs in premature infants with and without BPD. Refinement of these observations by future studies may permit a more accurate determination of the protein and caloric intake sufficient for growth and repair after injury in premature infants with lung disease.

Research paper thumbnail of Failure to Imbibe in Otherwise Normal Infants

Journal of Pediatric Gastroenterology and Nutrition, 2000

Research paper thumbnail of Early Administration of Oropharyngeal Colostrum to Extremely Low Birth Weight Infants

Breastfeeding Medicine, 2013

Background: Human milk reduces morbidities in extremely low birth weight (ELBW) infants. However,... more Background: Human milk reduces morbidities in extremely low birth weight (ELBW) infants. However, clinical instability often precludes ELBW infants from receiving early enteral feeds. This study compared clinical outcomes before and after implementing an oropharyngeal colostrum (COL) protocol in a cohort of inborn (born at our facility) ELBW infants. Study Design: This is a retrospective cohort study of inborn ELBW infants admitted to the Duke Intensive Care Nursery from January 2007 to September 2011. In November 2010, we initiated a COL protocol for infants not enterally fed whose mothers were providing breastmilk. Infants received 0.1 mL of fresh COL to each cheek every 4 hours for 5 days beginning in the first 48 postnatal hours. We assessed demographics, diagnoses, feeding history, and mortality and for the presence of medical necrotizing enterocolitis (NEC), surgical NEC, and spontaneous perforation. Between-group comparisons were made using Fisher's exact test or Wilcoxon rank sum testing where appropriate. Results: Of the 369 infants included, 280 (76%) were born prior to the COL protocol (Pre-COL Cohort [PCC]), and 89 (24%) were born after (COL Cohort [CC]). Mortality and the percentage of infants with surgical NEC and spontaneous perforations were statistically similar between the groups. The CC weighed an average (interquartile range) of 1,666 (1,399, 1,940) g at 36 weeks versus 1,380 (1,190, 1,650) g for the PCC (p < 0.001). In a multivariable analysis with birth weight as a covariable, weight at 36 weeks was significantly greater (37 g; p < 0.01). Conclusions: Initiating oropharyngeal COL in ELBW infants in the first 2 postnatal days appears feasible and safe and may be nutritionally beneficial. Further research is needed to determine if early COL administration reduces neonatal morbidity and mortality.

Research paper thumbnail of Failure to Imbibe in Otherwise Normal Infants

Journal of Pediatric Gastroenterology and Nutrition, Apr 1, 2000