Epidemiological characteristics and risk factors of biliary atresia: a case-control study

Impact of socioeconomic and geographical factors on clinical care of biliary atresia patients: a cross-sectional study

PURPOSE

Biliary atresia (BA) is a critical pediatric condition requiring timely intervention through Kasai portoenterostomy (KPE), and up to two-thirds of patients need liver transplantation (LT). The outcomes for BA patients still need improvement in low- and middle-income countries. This study aims to assess the socioeconomic and geographical profile of BA patients in India, focusing on their compliance with follow-up care, treatment-seeking behaviour, and acceptability of LT in addition, it provides recommendations to overcome identified challenges.

METHODS

A retrospective observational study was conducted in a tertiary care centre in India, including 48 patients who underwent KPE between 2018 and 2022. SES was assessed using the modified Kuppuswamy scale, and geographical areas were classified as per the criteria of the Indian Census 2011. Compliance with follow-up, treatment-seeking behaviour, and LT acceptability were evaluated.

RESULTS

The majority of patients belonged to rural areas and lower middle SES. Compliance with follow-up decreased over time, with financial and geographical barriers being significant challenges. Only one patient underwent LT due to prohibitive costs and limited accessibility.

CONCLUSION

Socioeconomic and geographical factors significantly impact the clinical outcomes of BA patients in India. Improving education, healthcare infrastructure, and financial support is crucial for enhancing patient compliance and access to necessary treatments.

Biliary atresia with rare associations: a case report and literature review

Introduction and importance

Biliary atresia is a rare, progressive cholangiopathy that affects newborns, causing jaundice and other manifestations of hyperbilirubinemia. The incidence is higher in Asia than in Europe. The only available treatment is a surgical operation called Kasai portoenterostomy. In this case, the authors highlighted rare congenital anomalies that came with biliary atresia.

Case presentation

A 10-day-old male infant was admitted to the hospital due to recurrent vomiting, yellowish skin, and scleral icterus. Laboratory investigations revealed elevated total serum and direct bilirubin levels. An atrophic gallbladder was observed on ultrasound. Intrahepatic cholangiography confirmed the diagnosis of biliary atresia, leading to the performance of a Kasai procedure. Additionally, the patient had intestinal malrotation and volvulus, which were managed with a Ladd's procedure. Following surgery, there was notable improvement in liver enzymes and bilirubin levels, and the patient was discharged after 7 days. The infant has been initiated on oral vitamins, ursodeoxycholic acid, and antibiotics.

Clinical discussion

Biliary atresia is a challenging condition characterized by progressive narrowing and fibrosis of the biliary tree. It is rarely associated with rare congenital anomalies like situs inversus totalis, intestinal malrotation, and volvulus. Diagnosis involves abdominal ultrasound and MRCG. The biliary atresia was managed by the Kasai procedure and the intestinal malrotation, and volvulus were managed by Ladd's procedure.

Conclusion

This case report highlights the importance of considering rare associations such as situs inversus, intestinal malrotation and volvulus in the diagnosis of biliary atresia in newborn. Early diagnosis and prompt intervention are crucial for optimal outcomes.

Amyloid precursor protein as a fibrosis marker in infants with biliary atresia

BACKGROUND

Biliary atresia (BA) is a rare condition of unknown origin in newborns with jaundice. In BA bile ducts are non-functional, causing neonatal cholestasis and following liver fibrosis and failure.

METHODS

This retrospective study included liver biopsies of 14 infants with BA aged [mean ± SD] 63 ± 23 days. Patients were grouped according to the clinical course (jaundice-free vs recurrent jaundice vs required liver transplantation or liver fibrosis (Ishak fibrosis score)) and followed for 1.61-5.64 years (mean 4.03). Transcriptome profiles were assessed using a panel of 768 fibrosis-specific genes, reanalyzed via qRT-PCR, and confirmed via immunostaining. Plasma from an additional 30 BA infants and 10 age-matched controls were used for amyloid precursor protein (APP) quantification by ELISA.

RESULTS

Different clinical outcome groups showed a homogeneous mRNA expression. Altered amyloid-metabolism-related gene expression was found between cases with Ishak fibrosis score greater than 4. Immunostaining confirmed a distinct presence of APP in the livers of all BA subjects. APP plasma levels were higher in BA than in age-matched controls and correlated with the histological fibrosis grade.

CONCLUSIONS

These results suggest that amyloidosis may contribute to BA and liver fibrosis, indicating that APP could serve as a potential liquid biomarker for these conditions.

IMPACT

Biliary atresia patients with higher fibrosis scores according to Ishak have higher hepatic expression of amyloid-related genes while amyloid precursor protein accumulates in the liver and increases in the circulation. After a recent study revealed beta-amyloid deposition as a mechanism potentially involved in biliary atresia, we were able to correlate amyloid-metabolism-related transcript levels as well as amyloid precursor protein tissue and plasma levels with the degree of hepatic fibrosis. These findings suggest that amyloid precursor protein is a fibrosis marker in infants with biliary atresia, reinforcing the role of amyloid metabolism in the pathogenesis of this serious disease.

Analysis for trends in disease burden of congenital birth defects among children under 5 years old in China

OBJECTIVES

Congenital birth defects are the main source of disease burden among children under 5 years old in China. This study aims to compare the trends in disease burden of different congenital birth defects among Chinese children under 5 years old from 1990 to 2019, and to provide a scientific basis for strengthening the comprehensive prevention and control of birth defects.

METHODS

Based on data from the Global Burden Disease (GBD) in 2019, the incidence mortality rate, and disability-adjusted life years (DALYs) rate of congenital birth defects among Chinese children under 5 years old from 1990 to 2019 were selected as evaluation indicators. The Joinpoint regression model was used to analyze the trends in disease burden of different types with congenital birth defects over three decades. The study also compared the differences in disease burden of congenital birth defects among children under 5 years old by gender.

RESULTS

Compared to 1990, the DALYs rates of congenital heart anomalies (1 931.91/100 000), digestive congenital anomalies (364.63/100 000), neural tube defects (277.20/100 000), congenital musculoskeletal and limb anomalies (133.33/100 000), and Down syndrome (128.22/100 000) in children under 5 years old in China in 2019 were decreased 70.78%, 71.61%, 86.21%, 36.84% and 73.65%, respectively. From 1990 to 2019, the mortality rates and DALYs rates of different congenital birth defects showed an overall downward trend, but the incidence of digestive congenital anomalies and Down syndrome showed an upward trend after 2005 and 2001, respectively. Except for congenital musculoskeletal and limb anomalies, incidence of the remaining categories of birth defects were higher in boys than that in girls.

CONCLUSIONS

The disease burden of congenital birth defects in children under 5 years old in China is decreased substantially from 1990 to 2019, but the burden of congenital heart anomalies is still serious and the incidence of some birth defect diseases is on the rise, and it is still crucial to strengthen the prevention and treatment for birth defects in children and propose targeted measures according to their gender characteristics.

Advances in understanding of biliary atresia pathogenesis and progression - a riddle wrapped in a mystery inside an enigma

INTRODUCTION

Biliary atresia is a potentially fatal condition of the bile ducts - both intra- and extrahepatic, for which we have no cure. Though principally a cholestatic condition, much of its pathology stems from its tendency to aggressively induce liver fibrosis and ultimately cirrhosis, only partially restrained by the portoenterostomy.

AREAS COVERED

This review is based on the current literature exploring the heterogeneous nature of biliary atresia. Thus, there are various phenotypes or variants of biliary atresia, each potentially with different etiological backgrounds caused by a number of hypothetical pathological mechanisms thought to be important in the genesis of the condition. Search methodology: the review (Oct. - Nov. 2022) is based on a search of PubMed (NLM) using main keyword 'biliary atresia' with supplementary searches using 'fibrosis'; 'inflammation'; 'BASM'; 'genetics'; 'surgery'; 'experimental'; 'etiology'; 'virology'; 'cases'; and 'syndromes.'

EXPERT OPINION

Future developments will be made on matching clinical variants with a more distinct pathophysiological discrimination and those pathways linking the initial cholestatic phase of biliary atresia to the early stages of fibrosis.

Maternal risk factors associated with offspring biliary atresia: population-based study

BACKGROUND

Biliary atresia (BA) is a progressive, idiopathic, fibro-obliterative disease of the intra and extrahepatic biliary tree. If untreated, it results in severe liver injury and death. The etiology and pathogenesis of BA remain unclear. Few studies have investigated the association between maternal illness/drug use and the occurrence of BA in offspring.

METHODS

We used the data from the Birth Certificate Application of Taiwan and linked to National Health Insurance Research Database and Taiwan Maternal and Child Health Database for the years 2004 to 2017 (N = 1,647,231) on 2022/03, and identified BA cases according to diagnosis and procedure code. A total of 285 BA cases were identified.

RESULTS

Mothers with type 2 diabetes mellitus and non-dependent drug abuse had higher rates having BA children than non-BA children, with an odds ratio of 2.17 (95% confidence interval [CI] = 1.04-4.53) and OR: 3.02 (95% CI = 1.34-6.78), respectively.

CONCLUSION

These results support the notion that BA occurrence is related to maternal reasons. Further studies should be designed to identify additional maternal and pregnancy risk factors and to understand the underlying pathophysiology.

IMPACT

1. The occurrence of offspring biliary atresia may be related to maternal illness/drug use. 2. Maternal drug abuse and type 2 diabetes mellitus pose a high risk for offspring biliary atresia. 3. If maternal etiology is found, biliary atresia might be a preventable disease.