Impact of the COVID-19 Era on Phenylalanine Levels and Classical Phenylketonuria Patients Follow-Up: A Retrospective Analysis

Yıl 2025, Cilt: 19 Sayı: 2, 59 - 63, 24.03.2025

Ayca Burcu Kahraman , Yılmaz Yıldız , Neslihan Nisa Geçici , Kısmet Çıkı , İzzet Erdal , Halil Tuna Akar , Ali Dursun , Ayşegül Tokatli , Serap Sivri

https://doi.org/10.12956/tchd.1537456

Öz

Objective: Phenylketonuria is a metabolic disorder resulting from mutations in the PAH gene, causing elevated blood phenylalanine (Phe) levels which can lead to severe neurological damage if untreated. The primary treatment is a lifelong low-protein diet with amino acid substitutes and micronutrient supplements. During the COVID-19 pandemic, classical phenylketonuria (PKU) patients faced significant challenges, including restricted access to routine care like clinical visits and metabolic control monitoring. The aim of the this study was to examine the disruptions in outpatient visits, the variances in pre- and post-pandemic Phe levels, and clinical severity among patients who contracted COVID-19.

Material and Methods: Starting from the pandemic date of March 11, 2020, demographic data, laboratory characteristics, and details about COVID-19 infection were retrospectively reviewed for classical PKU patients with accessible electronic records from March 2018 to March 2022.

Results: When the median blood Phe levels before and after the pandemic were compared, a significant difference was found. We observed that adult patients diagnosed with classical PKU often defaulted on their follow-up appointments.

Conclusion: The COVID-19 pandemic significantly disrupted the follow-up and management of classical PKU patients. However, no severe COVID-19 cases were reported among this population, suggesting they did not face an increased risk from the infection. This study emphasizes the critical need to develop robust strategies for patient engagement and follow-up, especially for adult classical PKU patients who are at risk of discontinuing routine care.

Anahtar Kelimeler

Classical phenylketonuria, COVID-19, Phenylalanine levels, SARS-CoV-2

Etik Beyan

This study received approval from the Hacettepe University Ethics Committee for Non-Interventional Clinical Studies (GO22/176, 2022/08–23).

Destekleyen Kurum

The authors received no financial support for the research.

Proje Numarası

GO22/176

COVİD-19 Döneminin Fenilalanin Düzeyleri ve Klasik Fenilketonüri Hastalarının Takibi Üzerindeki Etkisi: Retrospektif Bir Analiz

Öz

Amaç: Fenilketonüri, PAH genindeki mutasyonlardan kaynaklanan ve tedavi edilmediği takdirde ciddi nörolojik hasara yol açabilecek yüksek kan fenilalanin (Phe) seviyelerine neden olan bir metabolik bozukluktur. Birincil tedavi, ömür boyu düşük proteinli diyet ve amino asit ikameleri ile mikro besin takviyeleridir. COVİD-19 pandemisi sırasında, klasik fenilketonüri (PKU) hastaları, klinik ziyaretler ve metabolik kontrol izlemeleri gibi rutin bakıma erişimde önemli zorluklarla karşılaştı. Bu çalışmanın amacı, ayakta hasta ziyaretlerindeki aksaklıkları, pandemi öncesi ve sonrası Phe seviyelerindeki farklılıkları ve COVİD-19’a yakalanan hastalar arasındaki klinik şiddeti incelemekti.

Gereç ve Yöntemler: Pandemi başlangıç tarihi olan 11 Mart 2020’den itibaren, Mart 2018’den Mart 2022’ye kadar elektronik kayıtlara erişilebilen klasik PKU hastaları için demografik veriler, laboratuvar özellikleri ve COVİD-19 enfeksiyonu ile ilgili detaylar retrospektif olarak incelendi.

Bulgular: Pandemi öncesi ve sonrası medyan kan Phe seviyeleri karşılaştırıldığında, anlamlı bir fark bulundu. Klasik PKU tanısı alan yetişkin hastaların takip randevularını sıklıkla aksattıkları gözlemlendi.

Sonuç: COVİD-19 pandemisi, klasik PKU hastalarının takibi ve yönetimini önemli ölçüde aksattı. Bununla birlikte, bu popülasyon arasında ciddi COVİD-19 vakaları bildirilmemiştir, bu da enfeksiyon açısından artmış bir riskle karşı karşıya olmadıklarını düşündürmektedir. Bu çalışma, özellikle rutin bakımı aksatma riski taşıyan yetişkin klasik PKU hastaları için, hasta katılımı ve takip konusunda sağlam stratejiler geliştirilmesi gerekliliğini vurgulamaktadır.

Anahtar Kelimeler

Klasik fenilketonüri, COVİD-19, Fenilalanin seviyeleri, SARS-CoV-2

Proje Numarası

GO22/176

Kaynakça

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