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Association of low 25-hydroxyvitamin D concentrations with elevated parathyroid hormone concentrations and low cortical bone density in early pubertal and prepubertal Finnish girls. Cheng S, Tylavsky F, Kröger H, Kärkkäinen M, Lyytikäinen A, Koistinen A, Mahonen A, Alen M, Halleen J, Väänänen K, Lamberg-Allardt C. Am J Clin Nutr. 2003 Sep;78(3):485-92. Erratum in: Am J Clin Nutr. 2006 Jan;83(1):174. PMID: 12936933 CONCLUSIONS: Vitamin D-deficient girls have low cortical BMD and high iPTH concentrations, which are consistent with secondary hyperparathyroidism. A low vitamin D concentration accompanied by high bone resorption (TRAP 5b) may limit the accretion of bone mass in young girls.

Effects of calcium, dairy product, and vitamin D supplementation on bone mass accrual and body composition in 10-12-y-old girls: a 2-y randomized trial. Cheng S, Lyytikäinen A, Kröger H, Lamberg-Allardt C, Alén M, Koistinen A, Wang QJ, Suuriniemi M, Suominen H, Mahonen A, Nicholson PH, Ivaska KK, Korpela R, Ohlsson C, Väänänen KH, Tylavsky F. Am J Clin Nutr. 2005 Nov;82(5):1115-26; quiz 1147-8. PMID: 16280447

WEST LAFAYETTE, Ind. - Researchers have uncovered new evidence suggesting factors other than genes could cause obesity, finding that genetically identical cells store widely differing amounts of fat depending on subtle variations in how cells process insulin. Learning the precise mechanism responsible for fat storage in cells could lead to methods for controlling obesity. "Insights from our study also will be important for understanding the precise roles of insulin in obesity or Type II diabetes, and to the design of effective intervention strategies," said Ji-Xin Cheng, an assistant professor in Purdue University's Weldon School of Biomedical Engineering and Department of Chemistry. Findings indicate that the faster a cell processes insulin, the more fat it stores.

Strategies to improve vitamin D status in northern European children: exploring the merits of vitamin D fortification and supplementation. Tylavsky FA, Cheng S, Lyytikäinen A, Viljakainen H, Lamberg-Allardt C. J Nutr. 2006 Apr;136(4):1130-4. PMID: 16549494

Dietary Omega-3 Fatty Acids, Cyclooxygenase-2 Genetic Variation, and Aggressive Prostate Cancer Risk. Fradet V, Cheng I, Casey G, Witte JS. Clin Cancer Res. 2009 Mar 24. [Epub ahead of print] PMID: 19318492 DOI: 10.1158/1078-0432.CCR-08-2503

Time-dependent persistence of enhanced immune response by a potential probiotic strain Lactobacillus paracasei subsp. paracasei NTU 101. Tsai YT, Cheng PC, Fan CK, Pan TM. Int J Food Microbiol. 2008 Dec 10;128(2):219-25. Epub 2008 Aug 26. PMID: 18809220 doi:10.1016/j.ijfoodmicro.2008.08.009  

Meat and egg consumption and risk of breast cancer among Chinese women. Zhang CX, Ho SC, Chen YM, Lin FY, Fu JH, Cheng SZ. Cancer Causes Control. 2009 Jun 17. [Epub ahead of print] PMID: 19533390 Conclusions This study suggested that processed meat intake was associated with a possible increased risk of breast cancer. There was no significant association between consumption of total and red meat, poultry, fish, or egg with breast cancer risk