Japanese Journal of Gastroenterology and Hepatology Case Report Transaldolase Deficiency A Case Report Khaled Alqoaer, ZiadAsaad, and MaisaHalabi* Department of Pediatrics. King Salman Armed Forces Hospital, Tabuk, Saudi Arabia Received: 17 July 2019 1. Abstract Accepted: 29 July 2019 Transaldolase TALDO deficiency is a rare autosomal recessive disorder of the Published: 06 Aug 2019 pentose phosphate pathway. It has variable presentations with poor outcome when *Corresponding to: present early in life. We present a young Saudi infant with a fatal early presentation Khaled Alqoaer, MD, De- of TALD deficiency. partment of pediatrics. 2. Keywords: Trans aldolase; Pentose pathway King Salman armed forc- es Hospital, Tabuk, Sau- di Arabia, E mail: dral- [email protected] 3. Introductıon 48 cm (-0.5 SD) and head circumference 31 cm (-2.8 SD). The patient was admitted on the second day of life to NICU Transaldolase TALDO is an enzyme required in pentose for six days because of indirect hyperbilirubinemia (total phosphate pathway (PPP). It is an alternative route for bilirubin 158 normal 5.1–20.5 mmol/L) and received glucose oxidation. It links the pentose phosphate pathway phototherapy. His platelet count was 45 (normal 223– to glycolysis. The end products are D-ribose 5-phosphate 461 cells/mL). The jaundice improved and the platelet and Nicotinamide adenine dinucleotidephosphate count rose to 61. The patient was discharged in a stable NADPH. In the absence of TALDO, toxic intermediate condition. He was seen after one week where the repeated products may accumulate and lead to variety of clinical CBC was normal and the platelet count was 200. At the features. TALDO deficiency is a rare autosomal recessive age of four months the patient presented with abdominal disorder with main presentations: an early onset severe distension that started according to the parents at the form that can be fatal and a late onset presentation which age of one moth and was gradually increasing. There was comprises a slowly progressive less severe form of the no history of vomiting, diarrhea or constipation, fever, disease. The diagnosis can be made by special tests in skin rash or decreased activity. The baby was on breast urine and plasma or by enzymatic assay. However, the feeding with acceptable intake. The physical examination diagnosis nowadays is usually confirmed by DNA analysis revealed normal vital signs with subtle dysmorphic of the TALDO1 gene. No effective treatment is available features (low set ears and depressed nasal bridge). The so far. skin examination was unremarkable. The weigh at age 4. The Case of four months was 5.4 kg (-1.4 SD), length 53 cm (-3.7 This is a four months old girl who was born at term by SD) and the head circumference 35 cm (-4.7 SD). The normal spontaneous vaginal delivery to a 39 years old abdomen was distended with no guarding, tenderness or mother. The parents are second degree cousins. They have dilated veins. There was huge splenomegaly up to the left had another five healthy children. The pregnancy was iliac fossa but no hepatomegaly. The shifting dullness was uneventful. The birth weight was 2.1 kg (-2.4 SD), length positive for ascites. The rest of physical examination was unremarkable. The investigations showed persistent low ©2019 MaisaHalabi. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and build upon your work non-commercially https://www.jjgastrohepto.org 2019; V(6): 1-4 white blood count as low as 3.3 (normal 7.73–13.12 cells/ was enlarged in size (span 12 cm), more of its left lobe that mL), absolute neutrophil count 860, lymphocytes count cross to the other side with homogenous attenuation and of 2060, monocytes 380, basophils and eosinophil of zero. regular contour. The spleen was: hugely enlarged reaches The hemoglobin dropped to 6.1 (normal 10.4–12.5 g/dl) The left iliac fossa (about 10 cm) with no focal lesions. with normochromic, normocytic picture. The reticulocyte Splenic vein was prominent (4.2 mm) but no gross count 6.9%. The platelet count was persistently low. varices noted. Moderate to marked ascites was noted. The peripheral blood film showed pancytopenia but no The Eye exam by ophthalmologist was unremarkable. abnormal cells. Serum urea, creatinine and electrolytes Echocardiogram was done and it showed just a small were all normal. Liver enzymes were mildly elevated. ASD secondum. The patient was managed with frequent ALT 135 (normal 3–30 U/L) and AST 81 (normal blood, fresh frozen plasma and platelet transfusions. 2–40 U/L) while the serum bilirubin was initially 95 Multiple infusions of human albumin were given because mmol/L with direct fraction of 50mmol/L. Later on of progressive abdominal distension and ascites with the serum bilirubin increased gradually till reached 539 minimal response. Intravenous immunoglobulin was mmol/L with direct fraction of 355 mmol/L. Alkaline given once. A sex weeks course of intravenous gancyclvir phosphatase 1107 (normal 110–400 U/L), albumin 13 was administered as per our infectious disease team. (normal 30–46 g/L) and GGT 77 (normal 12–55 U/L)). Diuretics in form of spironolactone and furosemide in Urine analysis was negative for protein and others. The addition to vitamin k and multivitamins were added as coagulation profile was initially normal but later on well. The patient didn’t show any improvement. The became prolonged (INR 2.7, PT 37 seconds and PTT 61 patient condition rapidly deteriorated and went in liver seconds). D-Dimer 7.36 (0-0.50 ug/ml), fibrinogen 100 and respiratory failure with uncontrollable pulmonary (normal 250-350 mg/dl). Serum alpha-fetoprotein was hemorrhage till passed away. Later on the analysis of elevated (>1000 ng/ml). Triglycerides, Serum ferritin, whole exome sequence showed homozygous for TALDO1 ammonia, lactate and blood gas were all normal. Serum c.793del, p.(Gln265Argfs*56), which is pathogenic and bile acids was elevated 87 (normal <10 umol/l) and diagnostic for Trans aldolase deficiency. serum Lactate dehydrogenase LDH was mildly elevated 5. Discussion (438 normal 180-430 u/l) Cytomegalo virus serology (IgM ) was positive while Ebestien bar virus serology Pentose pathway is an alternative route for glucose and PCR were negative. Stool alpha-fetoprotein was oxidation. The end products of the pathway are D-ribose normal. Thyroid profile (TSH, T3 and T4) was normal. 5-phosphate and Nicotinamide adenine dinucleotide Bone marrow aspiration showed scattered hematobiotic phosphate NADPH. Trans ketolase and trans aldolase, precursors. No increase in blast cells seen and no storage are essential enzymes required to link the pentose cells were identified. Urine for organic acids showed phosphate pathway to glycolysis in a reversible fashion. high methionine (Methionine level @ 82 uM (normal: These two enzymes convert pentose 5-phosphate into 6-63 uM). Also the serum amino acids showed moderate glycolytic intermediates [1, 2]. By conversion of the hyper-methioninemia. Tandem mass spectrometry from carbon structure among different sugars, it enables dried blood spot showed low b-Glcocerbrocidase of 2.3 the production of fructose-6 phosphate and erythrose- (normal > 2.5 umol/l/h) but acid Sphingomylase was 4-phosphate from glyceraldehyde-3-phosphate and normal. Molecular genetic testing for Gaucher disease sedoheptulose-7-phosphate. Intermediate toxic showed no pathogenic mutation. Skeletal survey x-ray metabolites such as ribitol, D-arabitol and erythritol may showed Widened metaphysis of the lower long bones only. accumulates In the absence of trans aldolase [3]. TALDO CT brain showed no evident intra-cranial calcifications. deficiency is a rare autosomal recessive inborn error of Abdominal CT scan revealed hepatosplenomegaly and the pentose phosphate pathway first described in 2001 ascites with patent Portal veins and no varices. The liver [1]. Citation: MaisaHalabi, Transaldolase Deficiency A Case Report. Japanese Journal of Gastroenterology and Hepatology. 2019; 1(6):1-4. 2 2019; V(6): 1-4 To date, has been diagnosed in 41 patients worldwide. Our patient represented the severe neonatal type The largest number of these patient where interestingly of TALDO deficiency. The interesting feature is the Saudis (12 patients) [4- 8]. Two main presentations huge splenomegaly, which was more impressive than of TALDO has been recognized so far: an early onset hepatomegaly. In most of the reported cases the presentation (prenatal or neonatal disease) which is hepatomegaly was more impressive. The diagnosis the severe form, in most of the cases rapidly fatal, and of TALDO deficiency is challenging. As the clinical a late onset presentation (early or late infantile form) presentation varies, the diagnosis usually is confirmed with slowly progressive and milder form of the disease. by DNA analysis of the TALDO1 gene. Abnormal polyols The liver dysfunction begins in early fetal life in both and/or sugars (erythritol, arabitol, ribitol, sedoheptitol, presentations. In the early onset presentation, liver perseitol, sedoheptulose, mannoheptulose, and involvement usually present in the form of coagulopathy, sedoheptulose-7P) can be detected in urine. Erythritol, transaminitis, hypo albuminemia, and skin changes in arabitol, and ribitol may be mildly elevated in the plasma newborns. Progressive liver failure is the main factor in and cerebrospinal fluid. Previously erythronic acid has the reduced lifespan. In patients with later onset of the been labeled as a biomarker in TALDO-D. Aminoaciduria disease, liver dysfunction is milder and progresses more is not uncommon but usually not specific and of the form slowly. Renal tubular dysfunction may occur and usually commonly seen with liver dysfunction (high glutamine, present with low molecular weight proteinuria [8]. The methionine, and ethanolamine). Enzymatic analysis of mechanism of liver and kidney involvement in TALDO is TALDO enzyme can be measured and usually showed most likely secondary to the toxic accumulation of sugars lower level than control.