Pellagra is a vitamin deficiency disease most frequently caused by a chronic lack of niacin (vitamin B3 or vitamin PP, from pellagra-preventing factor) in the diet. It can be caused by decreased intake of niacin or tryptophan, and possibly by excessive intake of leucine. It may also result from alterations in protein metabolism in disorders such as carcinoid syndrome or Hartnup disease. A deficiency of the amino acid lysine can lead to a deficiency of niacin, as well.
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https://www.hindawi.com/journals/cggr/2012/302875/ adrian c. williams, lisa j. hill, and david b. ramsden, “nicotinamide, nad(p)(h), and methyl-group homeostasis evolved and became a determinant of ageing diseases: hypotheses and lessons from pellagra,”current gerontology and geriatrics research, vol. 2012, article id 302875, 24 pages, 2012. doi:10.1155/2012/302875
hariharasubramony a, chankramath s, prathyusha d. a case of alcohol-dependent syndrome and pellagra. int j nutr pharmacol neurol dis [serial online] 2013 [cited 2016 oct 13];3:61-3. available from: http://www.ijnpnd.com/text.asp?2013/3/1/61/106997
garg g, khopkar u. ethionamide-induced pellagroid dermatitis resembling lichen simplex chronicus: a report of two cases. indian j dermatol venereol leprol [serial online] 2011 [cited 2016 oct 13];77:534. available from: http://www.ijdvl.com/text.asp?2011/77/4/534/82405