Diyarbakır ilindeki çocuklarda ve adölesanlarda B12 vitamin ve folik asit düzeyleri

Çocukluk yaş grubunda megaloblastik anemilerin en sık nedeni B12 vitamin ve folik asit eksikliğidir. Folik asit ve B12 vitamin; gastrointestinal, ürogenital, ve sinir sisteminde, hematopoetik hücrelerde DNA sentezinde rol alır. Megaloblastik aneminin tanısı kolaydır ve tedavi maliyeti düşüktür. Bu çalışmada Diyarbakır ili merkez bölgede öğrenim gören, 12-22 yaş grubu (294’ü (%33,1) kız, 595’i (%66,9) erkek olmak üzere toplam 889 öğrenciden serum örnekleri alınarak B12 vitamin ve folik asit düzeyleri RİA yöntemiyle çalışıldı. B12 vitamini eksikliği %2,2, folik asit eksikliği %21,8 sıklığında saptandı. Ortalama folik asit düzeyi 5,42±2,12 ng/ml (Erkeklerde 5,23±2,11 ng/ml, kızlarda 5,80 ±2,10 ng/ml), ortalama B12 vitamin düzeyi 331,51±144,05 pg/mL (erkeklerde 325,60±138,91 pg/mL, kızlarda 343,48 ±153,48 pg/mL) olarak saptandı. Muhtemelen düşük sosyoekonomik durum, yetersiz ve dengesiz beslenme ve eğitim düzeyinin düşük olması sonucu bölgemizde folik asit eksikliği prevalansı diğer ülkelere oranla daha yüksektir.

B12 vitamin and folat prevelance of children and adolescents in Diyarbakır

The most common cause of megaloblastic anemia in childhood are vitamin B12 and folat deficiency. Folat and vitamin B12 play a role in DNA synthessis in gastrointestinal, urogenital,nerves and hemotopoetic cells. The diagnosis of megaloblastic anemia is easy and the treatment cost is low. In this study, the prevalence of vitamin B12 and folat deficiencies in 889 students were determined. Vitamin B12 and folat levels in blood samples were measured via RİA The average age were betwen 12 and 22 years. Of this students 294(%33,1) were female and 595 (%66,9) were male. The incidence of vitamin B12 deficiency was found to be 2.2%, while folat deficiency was 21.8%. The mean vitamin B12 level was 331,51±144,05 pg/mL (325,60±138,91 in pg/mL male, 343,48±153,48 pg/mL in female), the mean folat level was 5,42±2,12 ng/ml (5,23±2,11 ng/ml in male, 5,80±2,10 ng/ml in female). The prevelance of folat deficiency in our region was higher than other countries, possibly due to low socioeconomical status, improper or inadequate food intake and low educational status.

___

  • 1. Carmel R, Green R, Rosenblatt DS, Watkins D. Update on Cobalamin, Folate, and Homocysteine. Hemato 2003; 1: 62-81.
  • 2. Van Der Put NM, Steegers-Theunissen RP, Frosst P. Mutated methylene tetrahydrofolate reductase as a risk factor for spina bifida. Lancet 1995; 346:1070-1071.
  • 3. Klerk M, Verhoef P, Clarke R. MTHFR 677C→T polymorphism and risk of coronary heart disease: a meta analysis. JAMA 2002; 288: 2023-2031.
  • 4. Cooper BA, Fehedy V, Blanshay P. Recognition of deficiency of vitamin B-12 using measurement of serum concentration. J Lab Clin Med 1986; 107: 447-452.
  • 5. Hall CA. Vitamin B-12 deficiency an early rise in mean corpuscular volume. JAMA 1981; 425: 1144-1146.
  • 6. Hanger HC, Sainsburg R, Gilchrist NL, Beard MEJ, Duncan JM. A community study of vitamin B-12 and folate levels in the elderly. J Am Geriatr Soc 1991; 89: 1155-1159.
  • 7. Riggs KM, Spiro A, Tucker K, Rush D. Relations of vitamin B-12, vitamin B-6, folate and homocysteine to cognitive performance in the normative aging study. Am J Clin Nutr 1996; 63: 306-314.
  • 8. Erdem Ş. Megaloblastik Anemiler. Büyüköztürk K. (ed). İç Hastalıkları. Nobel Tıp Kitapevi, İstanbul 1992; 443-448.
  • 9. Müftüoğlu E. Megaloblastik Anemiler. Klinik Hematoloji. 4.Baskı, Şahin Yayıncılık, Diyarbakır 1995; 53-67.
  • 10. Beck WS. Megaloblastic Anemias. In: Wyngaarden JB, Bennett JC, Smith LH, (ed). Cecil Textbook Of Medicine. 19th Ed., Philadelphia, WB Sounders Co 1992; 846-854.
  • 11. Lee GR. Megaloblastic and Nonmegaloblastic Macrocytic Anemias. In: Lee GR, Bithell TC, Foerster J, Athens JW, Lukens JN (ed). Wintrobe’s Clinical Hematology. 19th Ed., Philadelphia, Lea and Febiger 1993; 745-780.
  • 12. Altay Ç, Çetin M. Megaloblastik Anemiler. Katkı Pediatri Dergisi, Ankara 1995; 3: 346-362.
  • 13. Hages M, Pietrzik K. Evaluation of the folacin status in children with regard to the cobalamin and iron status. 1.Changes in the differential blood picture as a function of the vitamin and ferritin levels of the serum vs. erythrocytes. Int J Vitam Nutr Res 1985; 55: 59-67
  • 14. Hages M, Pietrzik K. Evaluation of the folacin status in children with regard to the cobalamin and iron status. 2.Incidence and severity of folate deficiency. Int J Vitam Nutr Res 1985; 55: 69-77.
  • 15. Zamani V, Ozsoylu S, Sakalli F, Laleli Y. Serum vitamin B12 concentrations in children. Turk J Pediatr 1986; 28: 105-110.
  • 16. Cristenson RH, Dert GA, Tuszynski A. Two radioassay for serum Vitamin B12 and folate determination compared in a reference interval study. Clin Chem 1985; 31: 1358-1360.
  • 17. Osifo BO, Lukanmbi FA, Bolodeoku JO. Reference values for serum folate, erythrocyte folate and serum cobalamin in Nigerian adolescents. Trop Geogr Med 1986; 38: 259-264.
  • 18. Wetherilt H, Ackurt F, Brubacher G, Okan B, Aktas S, Turdu S. Blood vitamin and mineral levels in 7-17 years old Turkish children. Int J Vitam Nutr Res 1992; 62: 21-29.
  • 19. Villalpando S, Montalvo-Velarde I, Zambrano N. et al. Vitamins A, C and folate status in Mexican children under 12 years and women 12-49 years: a probabilistic national survey. Salud Public Mex 2003; 45: 508-519.
  • 20. Allen LH, Rosado JL, Casterline JE. et. al. Vitamin B-12 deficiency and malabsorption are highly prevalent in rural Mexican communities. Am J Clin Nutr 1995; 62: 1013-1019.
  • 21. Cunningham L, Blanco A, Rodriguez S, Ascencio M. Prevalence of anemia, iron and folate deficiency in children 7 years smaller. Costa Rica, 1996 Arch Latinoam Nutr 2001; 51: 37-43.
  • 22. VanderJagt DJ, Spelman K, Ambe J. et. al. Folate and vitamin B12 status of adolescent girls in northern Nigeria. J Nat Med Assoc 2000; 92: 334-340.
  • 23. Nexo E. Variation with age of reference values for P-cobalamins. Scand J Haemato 1983; 30: 430-432.
  • 24. Saxena S, Carmel R. Racial differences in vitamin B12 levels in the United States. Am J Clin Pathol 1987; 88: 95-97.
  • 25. Wright JD, Bialostosky K, Gunter EW. et. al. Blood folate and vitamin B12: United States, 1988-94. Vital Health Stat 11. 1998; 243: 1-78.
  • 26. Carmel R. Pernicious anemia. The expected findings of very low serum cobalamin levels, anemia, and macrocytosis are often lacking. Arch Intern Med 1988; 148: 1712-1714.
  • 27. Flood VM, Webb KL, Smith W, Rochtchina E, Mitchell P. Prevalence of low serum folate, red cell folate, serum vitamin B12 and elevated homocysteine. Asia Pac J Clin Nutr 2004;13: 85.
  • 28. Schwartz E. Anemias of Inadequate Production. In: Behrman RE, Kliegman RM, 28. Jenson HB (ed). Nelson Textbook of Pediatrics. 16th ed., Philadelphia, WB Saunders Co 2000; 1463-1472.
  • 29. Christel LL, Gunnar KJ. Dietary intake and nutritional status of young vegans and omnivores in Sweden. Am J Clin Nutri 2002; 76: 100-106.
  • 30. Öner N, Aladağ N, Vatansever Ü. et al. Edirne İlinde Yaşayan Adolesan Kızlarda Folik Asit Prevalansının Araştırılması. VI. Ulusal Çocuk Gastroenteroloji, Hepatoloji ve Beslenme Kongresi 2004. Poster No:105. Kongre Kitabı 169.