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1. Weaning practices in phenylketonuria vary between health professionals in Europe

Author

Pinto, A., Adams, S., Ahring, K., Allen, H., Almeida, M.F., Garcia-Arenas, D., Arslan, N., Assoun, M., Atik Altınok, Y., Barrio-Carreras, D., Belanger Quintana, A., Bernabei, S.M., Bontemps, C., Boyle, F., Bruni, G., Bueno-Delgado, M., Caine, G., Carvalho, R., Chrobot, A., Chyż, K., Cochrane, B., Correia, Carla, Corthouts, K., Daly, A., De Leo, S., Desloovere, A., De Meyer, A., De Theux, A., Didycz, B., Dijsselhof, M.E., Dokoupil, K., Drabik, J., Dunlop, C., Eberle-Pelloth, W., Eftring, K., Ekengren, J., Errekalde, I., Evans, S., Foucart, A., Fokkema, L., François, L., French, M., Forssell, E., Gingell, C., Gonçalves, C., Gökmen Özel, H., Grimsley, A., Gugelmo, G., Gyüre, E., Heller, C., Hensler, R., Jardim, I., Joost, C., Jörg-Streller, M., Jouault, C., Jung, A., Kanthe, M., Koç, N., Kok, I.L., Kozanoğlu, T., Kumru, B., Lang, F., Lang, K., Liegeois, I., Liguori, A., Lilje, R., Ļubina, O., Manta-Vogli, P., Mayr, D., Meneses, C., Newby, C., Meyer, U., Mexia, S., Nicol, C., Och, U., Olivas, S.M., Pedrón-Giner, C., Pereira, R., Plutowska-Hoffmann, K., Purves, J., Re Dionigi, A., Reinson, K., Robert, M., Robertson, L., Rocha, J.C., Rohde, C., Rosenbaum-Fabian, S., Rossi, A., Ruiz, M., Saligova, J., Gutiérrez-Sánchez, A., Schlune, A., Schulpis, K., Serrano-Nieto, J., Skarpalezou, A., Skeath, R., Slabbert, A., Straczek, K., Giżewska, M., Terry, A., Thom, R., Tooke, A., Tuokkola, J., van Dam, E., van den Hurk, T.A.M., van der Ploeg, E.M.C., Vande Kerckhove, K., Van Driessche, M., van Wegberg, A.M.J., van Wyk, K., Vasconcelos, C., Velez García, V., Wildgoose, J., Winkler, T., Żółkowska, J., Zuvadelli, J., and MacDonald, A.

Published
2019
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2. Early feeding practices in infants with phenylketonuria across Europe

Author

Pinto, A., Adams, S., Ahring, K., Allen, H., Almeida, M.F., Garcia-Arenas, D., Arslan, N., Assoun, M., Atik Altınok, Y., Barrio-Carreras, D., Belanger Quintana, A., Bernabei, S.M., Bontemps, C., Boyle, F., Bruni, G., Bueno-Delgado, M., Caine, G., Carvalho, R., Chrobot, A., Chyż, K., Cochrane, B., Correia, C., Corthouts, K., Daly, A., De Leo, S., Desloovere, A., De Meyer, A., De Theux, A., Didycz, B., Dijsselhof, M.E., Dokoupil, K., Drabik, J., Dunlop, C., Eberle-Pelloth, W., Eftring, K., Ekengren, J., Errekalde, I., Evans, S., Foucart, A., Fokkema, L., François, L., French, M., Forssell, E., Gingell, C., Gonçalves, C., Gökmen Özel, H., Grimsley, A., Gugelmo, G., Gyüre, E., Heller, C., Hensler, R., Jardim, I., Joost, C., Jörg-Streller, M., Jouault, C., Jung, A., Kanthe, M., Koç, N., Kok, I.L., Kozanoğlu, T., Kumru, B., Lang, F., Lang, K., Liegeois, I., Liguori, A., Lilje, R., Ļubina, O., Manta-Vogli, P., Mayr, D., Meneses, C., Newby, C., Meyer, U., Mexia, S., Nicol, C., Och, U., Olivas, S.M., Pedrón-Giner, C., Pereira, R., Plutowska-Hoffmann, K., Purves, J., Re Dionigi, A., Reinson, K., Robert, M., Robertson, L., Rocha, J.C., Rohde, C., Rosenbaum-Fabian, S., Rossi, A., Ruiz, M., Saligova, J., Gutiérrez-Sánchez, A., Schlune, A., Schulpis, K., Serrano-Nieto, J., Skarpalezou, A., Skeath, R., Slabbert, A., Straczek, K., Giżewska, M., Terry, A., Thom, R., Tooke, A., Tuokkola, J., van Dam, E., van den Hurk, T.A.M., van der Ploeg, E.M.C., Vande Kerckhove, K., Van Driessche, M., van Wegberg, A.M.J., van Wyk, K., Vasconcelos, C., Velez García, V., Wildgoose, J., Winkler, T., Żółkowska, J., Zuvadelli, J., and MacDonald, A.

Published
2018
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3. Weaning practices in phenylketonuria vary between health professionals in Europe.

Author

UCL - (SLuc) Service d'endocrinologie et de nutrition, Pinto, A, Adams, S, Ahring, K, Allen, H, Almeida, M F, Garcia-Arenas, D, Arslan, N, Assoun, M, Atik Altınok, Y, Barrio-Carreras, D, Belanger Quintana, A, Bernabei, S M, Bontemps, C, Boyle, F, Bruni, G, Bueno-Delgado, M, Caine, G, Carvalho, R, Chrobot, A, Chyż, K, Cochrane, B, Correia, C, Corthouts, K, Daly, A, De Leo, S, Desloovere, A, De Meyer, A, De Theux, A, Didycz, B, Dijsselhof, M E, Dokoupil, K, Drabik, J, Dunlop, C, Eberle-Pelloth, W, Eftring, K, Ekengren, J, Errekalde, I, Evans, S, Foucart, Audrey, Fokkema, L, François, L, French, M, Forssell, E, Gingell, C, Gonçalves, C, Gökmen Özel, H, Grimsley, A, Gugelmo, G, Gyüre, E, Heller, C, Hensler, R, Jardim, I, Joost, C, Jörg-Streller, M, Jouault, C, Jung, A, Kanthe, M, Koç, N, Kok, I L, Kozanoğlu, T, Kumru, B, Lang, F, Lang, K, Liegeois, I, Liguori, A, Lilje, R, Ļubina, O, Manta-Vogli, P, Mayr, D, Meneses, C, Newby, C, Meyer, U, Mexia, S, Nicol, C, Och, U, Olivas, S M, Pedrón-Giner, C, Pereira, R, Plutowska-Hoffmann, K, Purves, J, Re Dionigi, A, Reinson, K, Robert, M, Robertson, L, Rocha, J C, Rohde, C, Rosenbaum-Fabian, S, Rossi, A, Ruiz, M, Saligova, J, Gutiérrez-Sánchez, A, Schlune, A, Schulpis, K, Serrano-Nieto, J, Skarpalezou, A, Skeath, R, Slabbert, A, Straczek, K, Giżewska, M, Terry, A, Thom, R, Tooke, A, Tuokkola, J, van Dam, E, van den Hurk, T A M, van der Ploeg, E M C, Vande Kerckhove, K, Van Driessche, M, van Wegberg, A M J, van Wyk, K, Vasconcelos, C, Velez García, V, Wildgoose, J, Winkler, T, Żółkowska, J, Zuvadelli, J, MacDonald, A, UCL - (SLuc) Service d'endocrinologie et de nutrition, Pinto, A, Adams, S, Ahring, K, Allen, H, Almeida, M F, Garcia-Arenas, D, Arslan, N, Assoun, M, Atik Altınok, Y, Barrio-Carreras, D, Belanger Quintana, A, Bernabei, S M, Bontemps, C, Boyle, F, Bruni, G, Bueno-Delgado, M, Caine, G, Carvalho, R, Chrobot, A, Chyż, K, Cochrane, B, Correia, C, Corthouts, K, Daly, A, De Leo, S, Desloovere, A, De Meyer, A, De Theux, A, Didycz, B, Dijsselhof, M E, Dokoupil, K, Drabik, J, Dunlop, C, Eberle-Pelloth, W, Eftring, K, Ekengren, J, Errekalde, I, Evans, S, Foucart, Audrey, Fokkema, L, François, L, French, M, Forssell, E, Gingell, C, Gonçalves, C, Gökmen Özel, H, Grimsley, A, Gugelmo, G, Gyüre, E, Heller, C, Hensler, R, Jardim, I, Joost, C, Jörg-Streller, M, Jouault, C, Jung, A, Kanthe, M, Koç, N, Kok, I L, Kozanoğlu, T, Kumru, B, Lang, F, Lang, K, Liegeois, I, Liguori, A, Lilje, R, Ļubina, O, Manta-Vogli, P, Mayr, D, Meneses, C, Newby, C, Meyer, U, Mexia, S, Nicol, C, Och, U, Olivas, S M, Pedrón-Giner, C, Pereira, R, Plutowska-Hoffmann, K, Purves, J, Re Dionigi, A, Reinson, K, Robert, M, Robertson, L, Rocha, J C, Rohde, C, Rosenbaum-Fabian, S, Rossi, A, Ruiz, M, Saligova, J, Gutiérrez-Sánchez, A, Schlune, A, Schulpis, K, Serrano-Nieto, J, Skarpalezou, A, Skeath, R, Slabbert, A, Straczek, K, Giżewska, M, Terry, A, Thom, R, Tooke, A, Tuokkola, J, van Dam, E, van den Hurk, T A M, van der Ploeg, E M C, Vande Kerckhove, K, Van Driessche, M, van Wegberg, A M J, van Wyk, K, Vasconcelos, C, Velez García, V, Wildgoose, J, Winkler, T, Żółkowska, J, Zuvadelli, J, and MacDonald, A

Abstract

BACKGROUND: In phenylketonuria (PKU), weaning is considered more challenging when compared to feeding healthy infants. The primary aim of weaning is to gradually replace natural protein from breast milk or standard infant formula with solids containing equivalent phenylalanine (Phe). In addition, a Phe-free second stage L-amino acid supplement is usually recommended from around 6 months to replace Phe-free infant formula. Our aim was to assess different weaning approaches used by health professionals across Europe. METHODS: A cross sectional questionnaire (survey monkey®) composed of 31 multiple and single choice questions was sent to European colleagues caring for inherited metabolic disorders (IMD). Centres were grouped into geographical regions for analysis. RESULTS: Weaning started at 17-26 weeks in 85% (n = 81/95) of centres, >26 weeks in 12% (n = 11/95) and < 17 weeks in 3% (n = 3/95). Infant's showing an interest in solid foods, and their age, were important determinant factors influencing weaning commencement. 51% (n = 48/95) of centres introduced Phe containing foods at 17-26 weeks and 48% (n = 46/95) at >26 weeks. First solids were mainly low Phe vegetables (59%, n = 56/95) and fruit (34%, n = 32/95).A Phe exchange system to allocate dietary Phe was used by 52% (n = 49/95) of centres predominantly from Northern and Southern Europe and 48% (n = 46/95) calculated most Phe containing food sources (all centres in Eastern Europe and the majority from Germany and Austria). Some centres used a combination of both methods.A second stage Phe-free L-amino acid supplement containing a higher protein equivalent was introduced by 41% (n = 39/95) of centres at infant age 26-36 weeks (mainly from Germany, Austria, Northern and Eastern Europe) and 37% (n = 35/95) at infant age > 1y mainly from Southern Europe. 53% (n = 50/95) of centres recommended a second stage Phe-free L-amino acid supplement in a spoonable or semi-solid form. CONCLUSIONS: Weaning strategies vary throu

Published
2019

4. Undiagnosed Phenylketonuria Can Exist Everywhere: Results From an International Survey

Author

Ahring, K., Al Mutairi, F., Arnoux, J.B., Ballhausen, D., Baruteau, J., Bernstein, L., Bijarnia-Mahay, S., Boemer, F., Bordugo, A., Brodosi, L., Brooks, S., Chew, H.B., Chyz, K., Coker, M., Collingwood, C., Cornejo, V., Couce, M.L., Cozens, A., Dahri, S., Das, A.M., de Laet, C., de las Heras Montero, J., de Vreugd, A., Debray, F.G., Dercksen, M., Descartes, M., Diogo, L., Drogari, E., Eiroa, H., Eminoglu, F.T., Enns, G.M., Eyskens, F., Feillet, F., Ford, S., Franzson, L., Freisinger, P., Garcia, P., Grafakou, O., Gramer, G., Gray, S., Groselj, U., Grünert, S.C., Haas, D., Handoom, B., Harte, T.B., Hendriksz, C., Heredia, R.S., Hertecant, J., Hoi-Yee Wu, T., Inwood, A., Jamuar, S.S., Jesina, P., Jonsson, J.J., Jovanovic, A., Kern, I., Kilavuz, S., Knerr, I., Kor, D., Korycinska-Chaaban, D., Kreile, M., Kumru, B., Lanpher, B., Lapatto, R., Lavigne, C., Leao-Teles, E., Leuzzi, V., Longo, N., Lopez-Uriarte, A., Lubout, C.M.A., MacDonald, A., Megdad, E.M., Mitchell, J., Mochel, F., Moreno-Lozano, P.J., Morris, A., Moura de Souza, C.F., Munoz, T., Nevalainen, P.I., Oscarson, M., Õunap, K., Paci, S., Pastores, G.M., Pearl, P.L., Piazzon, F.B., Pitt, J., Poon, G., Porta, F., Presner, N., Rabaty, A.A., Reinson, K., Reismann, P., Rink, T., Rocha, J.C., Rodrigues, E., Saini, A.G., Sanchez-Valle, A., Sander, J., Sarkhail, P., Schwartz, I.V.D., Sharma, R., Sheng, B., Siriwardena, K., Sirrs, S., Sjarif, D.R., Sondheimer, N., Sparkes, R., Specola, N., Stepien, K.M., Szatmari, I., Tchan, M., Tkemaladze, T., Tran, C., Valle, M.G., Vela-Amieva, M., Verdaguer, M.L., Vergano, S.A., Vermeersch, P., Vulturar, R., Wagenmakers, M.A.E.M., Weinhold, N., Williams, A.B., Wilson, W.G., Zafeiriou, D., Zhang, H., Ziagaki, A., Zolkowska, J., van Wegberg, Annemiek M.J., Trefz, Friedrich, Gizewska, Maria, Ahmed, Sibtain, Chabraoui, Layachi, Zaki, Maha S., Maillot, François, and van Spronsen, Francjan J.

Published
2021
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5. Early feeding practices in infants with phenylketonuria across Europe

Author

Afdeling Dietetiek, Other research (not in main researchprogram), Pinto, A., Adams, S., Ahring, K., Allen, H., Almeida, M. F., Garcia-Arenas, D., Arslan, N., Assoun, M., Atik Altınok, Y., Barrio-Carreras, D., Belanger Quintana, A., Bernabei, S. M., Bontemps, C., Boyle, F., Bruni, G., Bueno-Delgado, M., Caine, G., Carvalho, R., Chrobot, A., Chyż, K., Cochrane, B., Correia, C., Corthouts, K., Daly, A., De Leo, S., Desloovere, A., De Meyer, A., De Theux, A., Didycz, B., Dijsselhof, M. E., Dokoupil, K., Drabik, J., Dunlop, C., Eberle-Pelloth, W., Eftring, K., Ekengren, J., Errekalde, I., Evans, S., Foucart, A., Fokkema, L., François, L., French, M., Forssell, E., Gingell, C., Gonçalves, C., Gökmen Özel, H., Grimsley, A., Gugelmo, G., Gyüre, E., Heller, C., Hensler, R., Jardim, I., Joost, C., Jörg-Streller, M., Jouault, C., Jung, A., Kanthe, M., Koç, N., Kok, I. L., Kozanoğlu, T., Kumru, B., Lang, F., Lang, K., Liegeois, I., Liguori, A., Lilje, R., Ļubina, O., Manta-Vogli, P., Mayr, D., Meneses, C., Newby, C., Meyer, U., Mexia, S., Nicol, C., Och, U., Olivas, S. M., Pedrón-Giner, C., Pereira, R., Plutowska-Hoffmann, K., Purves, J., Re Dionigi, A., Reinson, K., Robert, M., Robertson, L., Rocha, J. C., Rohde, C., Rosenbaum-Fabian, S., Rossi, A., Ruiz, M., Saligova, J., Gutiérrez-Sánchez, A., Schlune, A., Schulpis, K., Serrano-Nieto, J., Skarpalezou, A., Skeath, R., Slabbert, A., Straczek, K., Giżewska, M., Terry, A., Thom, R., Tooke, A., Tuokkola, J., van Dam, E., van den Hurk, T. A.M., van der Ploeg, E. M.C., Vande Kerckhove, K., Van Driessche, M., van Wegberg, A. M.J., van Wyk, K., Vasconcelos, C., Velez García, V., Wildgoose, J., Winkler, T., Żółkowska, J., Zuvadelli, J., MacDonald, A., Afdeling Dietetiek, Other research (not in main researchprogram), Pinto, A., Adams, S., Ahring, K., Allen, H., Almeida, M. F., Garcia-Arenas, D., Arslan, N., Assoun, M., Atik Altınok, Y., Barrio-Carreras, D., Belanger Quintana, A., Bernabei, S. M., Bontemps, C., Boyle, F., Bruni, G., Bueno-Delgado, M., Caine, G., Carvalho, R., Chrobot, A., Chyż, K., Cochrane, B., Correia, C., Corthouts, K., Daly, A., De Leo, S., Desloovere, A., De Meyer, A., De Theux, A., Didycz, B., Dijsselhof, M. E., Dokoupil, K., Drabik, J., Dunlop, C., Eberle-Pelloth, W., Eftring, K., Ekengren, J., Errekalde, I., Evans, S., Foucart, A., Fokkema, L., François, L., French, M., Forssell, E., Gingell, C., Gonçalves, C., Gökmen Özel, H., Grimsley, A., Gugelmo, G., Gyüre, E., Heller, C., Hensler, R., Jardim, I., Joost, C., Jörg-Streller, M., Jouault, C., Jung, A., Kanthe, M., Koç, N., Kok, I. L., Kozanoğlu, T., Kumru, B., Lang, F., Lang, K., Liegeois, I., Liguori, A., Lilje, R., Ļubina, O., Manta-Vogli, P., Mayr, D., Meneses, C., Newby, C., Meyer, U., Mexia, S., Nicol, C., Och, U., Olivas, S. M., Pedrón-Giner, C., Pereira, R., Plutowska-Hoffmann, K., Purves, J., Re Dionigi, A., Reinson, K., Robert, M., Robertson, L., Rocha, J. C., Rohde, C., Rosenbaum-Fabian, S., Rossi, A., Ruiz, M., Saligova, J., Gutiérrez-Sánchez, A., Schlune, A., Schulpis, K., Serrano-Nieto, J., Skarpalezou, A., Skeath, R., Slabbert, A., Straczek, K., Giżewska, M., Terry, A., Thom, R., Tooke, A., Tuokkola, J., van Dam, E., van den Hurk, T. A.M., van der Ploeg, E. M.C., Vande Kerckhove, K., Van Driessche, M., van Wegberg, A. M.J., van Wyk, K., Vasconcelos, C., Velez García, V., Wildgoose, J., Winkler, T., Żółkowska, J., Zuvadelli, J., and MacDonald, A.

Published
2018

6. Comparison of phenylalanine tolerance in singleton and twin pregnancies in patients with phenylketonuria.

Author

Hozyasz KK, Żółkowska J, and Chyż K

Subjects
Diet, Female, Humans, Phenylalanine, Pregnancy, Phenylketonuria, Maternal, Pregnancy, Twin
Abstract

Objectives: Empirical determination of phenylalanine (Phe) tolerance in patients with phenylketonuria (PKU) relies on frequent assessment of blood Phe concentrations in relation to Phe intake from detailed meal records. This study aimed to determine Phe tolerance in twin pregnancies., Methods: The reviewed cases included three women with PKU who each had a singleton and twin pregnancy (i.e., they were pregnant twice). All patients were under regular supervision to maintain Phe concentrations in a steady state and determine safe Phe intake. Restriction of Phe in the patient's diet was determined depending on the amount of Phe intake, which allowed for stable blood Phe concentrations within the target range., Results: In all three patients with PKU, the ratio of Phe tolerance during the course of the twin and singleton pregnancies was <1 for most of the pregnancy. The ratio of the increase in Phe tolerance between 29 and 34 weeks of gestation and that between 15 and 28 weeks of gestation was 0.66 and 1.17, 0.51 and 0.14, and 0.76 and 1.42 in the twin and singleton pairs of pregnancies, respectively., Conclusions: Our study shows that Phe tolerance in a twin pregnancy is not greater than that in a singleton pregnancy.

Published
2020
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7. Low increase in phenylalanine tolerance during pregnancies in PKU woman with high prepregnancy BMI and postconceptional initiation of diet: A case report.

Author

Żółkowska J, Hozyasz K, and Ph D

Abstract

Background: Women with untreated phenylketonuria (PKU) are at an increased risk to have offspring with multiple abnormalities due to teratogenic effects of hyperphenylalaninaemia. Treatment goals include blood phenylalanine concentrations between 120 and 360 µmol/L, however, there are limited pieces of evidence for the practical management of pregnant PKU patient and prediction of phenylalanine tolerance changes during a course of pregnancy., Case: We report the case of a mother with classical PKU (p.R408W/p.R408W) and the course of her two pregnancies with low phenylalanine tolerance increase (347mg and 227mg) despite the rewarding collaboration with a nutritionist., Conclusion: This case report does not confirm the observation that a very low phenylalanine tolerance increase in pregnancy of PKU patient is a marker of coexisting PKU-affection in fetus., Competing Interests: The authors deny any conflict of interest related to this study., (Copyright © 2019 Joanna Żółkowska and Kamil Hozyasz.)

Published
2019
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8. Diversity of phenylalanine tolerance in pregnant phenylketonuria patients homozygous for the p.R408W mutation: the need for improved understanding of phenylalanine homeostasis.

Author

Hozyasz KK and Żółkowska J

Subjects
Female, Homeostasis, Humans, Mutation, Pregnancy, Amino Acids administration & dosage, Phenylalanine administration & dosage, Phenylketonurias diet therapy
Abstract

Dietetic treatment of phenylketonuria (PKU) includes a low-phenylalanine (phe) diet that provides sufficient phe for maintenance and growth plus special phe-free formulas with amino acids to meet requirements for protein, energy and micronutrients.

Published
2019

9. [Singleton and twin pregnancies of PKU patients - individual variability of phenylalanine tolerance: experience of a single treatment center (Preliminary report)].

Author

Żółkowska J, Hozyasz KK, and Nowacka M

Subjects
Adult, Diet, Protein-Restricted, Female, Humans, Infant, Newborn, Phenylketonuria, Maternal diet therapy, Poland, Pregnancy, Prenatal Care methods, Phenylalanine administration & dosage, Phenylalanine blood, Phenylketonuria, Maternal blood, Pregnancy Outcome
Abstract

Phenylketonuria (PKU) is the autosomal recessive deficiency of phenylalanine hydroxylase resulting in the accumulation of phenylalanine (Phe) in blood and in the brain. Phe restriction in a patient's diet is determined depending on the amount of Phe intake which allows for stable blood Phe levels within the therapeutic range of 120-360µmol/L. In clinical practice the empirical determination of Phe tolerance relies on frequent assessment of blood Phe concentrations in relation to Phe intake from food records. Untreated maternal PKU may lead to maternal PKU syndrome in offspring. The objective of the study was to compare Phe tolerance during the course of singleton and multiple pregnancies of PKU patients. Case subjects and methods: The cases reviewed included three sets of classical PKU-affected Polish women on a low-phenylalanine diet during the course of singleton and twin pregnancies and their PKU-unaffected newborns. All the patients were under regular supervision of a metabolic dietitian to stabilize blood Phe levels and determine Phe tolerance. Data on pregnancy weight gain, the gestational age when the diet initiated, the percent of Phe assessments < 120 µmol/L and > 360 µmol/L, as well as offspring birth measurements were analyzed., Results: The total increase in Phe tolerance and its pattern during the course of singleton and twin pregnancies differed remarkably in each patient. Three PKU women (Q383X/R408W, EX3DEL/EX3DEL, R281L/R408W) increased their Phe tolerance in singleton and twin pregnancies by 579%/468%, 674%/261%, and 427%/236%, respectively. During the last 10 weeks of singleton and twin pregnancy Phe tolerance showed an increase by 62%/149%, 33%/64%, and 37%/40%, respectively. The analysis of predictors for Phe tolerance showed that an individual's weight gain and the fetal weight gain as estimated from liveborn birth-weight data had no predictive capacity., Conclusions: Individual Phe tolerance in singleton pregnancies of PKU patients does not predict tolerance in twin pregnancy. Further research on the growing population of multiple pregnancy PKU patients is necessary to provide evidence-based guidelines to optimize the treatment of PKU in females of childbearing age.

Published
2017

10. [High plasma folate in patients with phenylketonuria].

Author

Zielińska M, Żółkowska J, Przybylska-Kruszewska A, Gładysz D, Korycińska-Chaaban D, Nowacka M, and Hozyasz KK

Subjects
Child, Child, Preschool, Female, Humans, Male, Phenylketonurias diet therapy, Poland, Retrospective Studies, Folic Acid blood, Phenylketonurias blood
Abstract

Unlabelled: Phenylketonuria is an inborn error of metabolism treated with a closely monitored low phenylalanine diet. Protein substitutes used for treatment are supplemented with vitamins and micronutrients., Aim: The aim of this study was to investigate plasma folic acid concentrations in children with phenylketonuria., Materials and Methods: Retrospective analysis of medical records of 73 patients with phenylketonuria and 28 with mild hyperphenylalaninemia (on normal diet) was carried out. Intake of folic acid was calculated on the basis of protein substitute intake. Folate concentrations were analyzed according to their intake, and concentration of homocysteine and phenylalanine., Results: In 76.7% patients with phenylketonuria intake of folic acid exceeded recommended dietary allowance. Serum folic acid concentrations above upper reference level were detected in 75.3% patients with phenylketonuria and only in 25% patients with hyperphenylalaninemia (p<0.0001). Strong positive correlation between daily intake of folic acid (with protein substitute) and concentration plasma folic acid (corr=0.55, p<0.0001) has been observed., Conclusions: Low phenylalanine diet using protein substitutes currently available in Poland predisposes to high concentration of plasma folic acid. The security of folic acid hipersupplementation in patients with phenylketonuria requires further detailed research., (© 2016 MEDPRESS.)

Published
2016

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