Early discoveries on enzyme deficiencies in lysosomal storage diseases: The Indian contribution

The discovery of enzyme deficiencies in lysosomal storage disorders began with two discoveries made in 1963. One of these was made by a Belgian scientist, Henri-Gery Hers, who discovered that in Pompe's disease there was a deficiency in α-glucosidase. The other was made by an international collaboration involving an American neurologist, James Austin, and an Indian biochemist, Bimal Bachhawat, where the enzyme arylsulfatase A was found deficient in metachromatic leukodystrophy. This article attempts to trace the events that led to this fruitful collaboration and how these two young investigators eventually discovered the defective enzyme in metachromatic leukodystrophy.