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About
I’m a pediatric endocrinologist at University Health and an assistant professor in the division of pediatric endocrinology and diabetes at UT Health San Antonio.
My interests include learning about cystic fibrosis-related diabetes (CFRD) and other CF endocrine related disorders. The majority of my research and presentations have focused on improving the screening, diagnosis and management of CFRD.
For the past seven years, I have helped develop a multidisciplinary clinic for CFRD patients in the CF Center with the CF Center director and staff. I’m the endocrinologist dedicated to seeing the adult CF patients with endocrine disorders. I have a KL2 research grant and a multi-center research grant that collaborates in recruiting and treatment of patients with CF-related diabetes issues.
Research Interests:
Continuous glucose monitoring in Type 1 diabetes and cystic fibrosis patients
Cystic fibrosis-related diabetes screening, diagnosis and treatment
Articles & Publications
Abstracts
Lynch JL, Willey-Courand DB, Rayas MS, Guajardo JR. Screening for Cystic Fibrosis-Related Diabetes by an Integrated Care Team Using an Algorithm; 2011 Jan. (Pediatric Pulmonology).
Book Chapters
TODAY Study Group, & Bjornstad Petter El ghormli Laure Hughan Kara S. Laffel Lori M. Nadeau Kristen J. Rayas Maria Tesfaldet Bereket Tollefsen Sherida E. Willi Steven M. Lynch Jane. (2022). Effects of metabolic factors, race-ethnicity, and sex on the development of nephropathy in adolescents and young adults with type 2 diabetes: results from the TODAY Study. Diabetes Care, 45(5), 1056-1064.
Orsi C, Rayas M, Escaname E, Hutchins, J. Chapter 8: Pediatric Type 2 Diabetes Mellitus. In: Orsi CM; Rayas MS; Escaname EN, Hutchins J. Recent Advances in Pediatric Medicine Synopsis of General Pediatric Practice. 2017. p. 105-116.
Journal Articles
Arslanian S, El Ghormli L, Haymond MH, Chan CL, Chernausek SD, Gandica RG, Gubitosi-Klug R, Levitsky LL, Siska M, Willi SM; TODAY Study Group. (J Lynch, E Escaname, M Rayas) . Beta cell function and insulin sensitivity in obese youth with maturity onset diabetes of youth mutations vs type 2 diabetes in TODAY: Longitudinal observations and glycemic failure. Pediatr Diabetes. 2020 Jun;21(4):575-585. doi: 10.1111/pedi.12998. Epub 2020 Mar 3. PMID: 32064729.
Kaar JL, Schmiege SJ, Drews K, Higgins J, Walders-Abramson N, Isganaitis E, Willi SM, Marcus MD, Zeitler PS, Kelsey MM. Evaluation of the longitudinal change in health behavior profiles across treatment groups in the TODAY clinical trial. (J Lynch, E Escaname, M Rayas) Pediatr Diabetes. 2020 Mar;21(2):224-232. doi: 10.1111/pedi.12976 PMID: 31886931.
Shah R, McKay SV, Levitt Katz LE, El Ghormli L, Anderson BJ, Casey TL, Higgins L, Izquierdo R, Wauters AD, Chang N; TODAY Study Group.(J Lynch, E Escaname, M Rayas) . Adherence to multiple medications in the TODAY (Treatment Options for type 2 Diabetes in Adolescents and Youth) cohort: effect of additional medications on adherence to primary diabetes medication. J Pediatr Endocrinol Metab. 2020 Feb 25;33(2):191-198. doi: 10.1515/jpem-2019-0315. PMID: 31809265.
Rayas MS, Kelly A, Hughan KS, Daley T, Zangen D. Adrenal Function in Cystic Fibrosis J Cyst Fibros 2019 Oct;18:S74-S81.
Block JP, Bailey LC, Gillman MW, Lunsford D, Daley MF, Eneli I, Finkelstein J, Heerman W, Horgan CE, Hsia DS, Jay M, Rao G, Reynolds JS, Rifas-Shiman SL, Sturtevant JL, Toh S, Trasande L, Young J, Forrest CB, Rayas MS. PCORnet Antibiotics and Childhood Growth Study Group. Early Antibiotic Exposure and Weight Outcomes in Young Children Pediatrics 2019 Jan.
Daley Jean Pierre, Tangpricha Vin, Kelly A, Rayas MS, Hughan Kara. Vitamin D deficiency and its Treatment in Cystic Fibrosis Journal of Cystic Fibrosis 2019 Oct; 18:S66-S73.
Klingensmith GJ, Lanzinger S, Tamborlane WV, Hofer S, Cheng P, deBeaufort C, Gal RL, Reinehr T, Kollman C, Holl R. PDC Consortium: Lynch JL, Orsi CM, Rayas MS, Barajas R. Adolescent Type 2 Diabetes: Comparing the Pediatric Diabetes Consortium and Germany/Austria/Luxemburg Pediatric Diabetes Prospective Registries Pediatr Diabetes 2018 Nov;19(7):1156-1163.
Block JP, Bailey LC, Gillman MW, Lunsford D, Boone-Heinonen J, Cleveland LP, Finkelstein J, Horgan C, Jay M, Reynolds JS, Sturtevant J, Forrest CB. PCORnet Antibiotics Childhood Growth Study Group Tirado-Ramos A, Rayas M. PCORnet Antibiotics and Childhood Growth Study: Process for Cohort Creation and Cohort Description Acad Pediatr 2018 Jul;18(5):569-576.
Other Publications
Castellanos LE, Russell SJ, Damiano ER, Beck RW, Shah VN, Bailey R, Calhoun P, Bird K, Mauras N; Bionic Pancreas Research Group. The Insulin-Only Bionic Pancreas Improves Glycemic Control in Non-Hispanic White and Minority Adults and Children With Type 1 Diabetes. Diabetes Care. 2023 Mar 31:dc221478. doi: 10.2337/dc22-1478. PMID: 37000680.
Mauras N, Damiano ER, El-Khatib FH, Marak MC, Calhoun P, Ruedy KJ, Balliro C, Li Z, Beck RW, Russell SJ. Utility and Safety of Backup Insulin Regimens Generated by the Bionic Pancreas: A Randomized Study. Diabetes Technol Ther. 2023 Mar 22. doi: 10.1089/dia.2022.0461. PMID: 36877259.
VAVRINA, K., PILLAI, R., & RAYAS, M. S. (2023). 1110-P: Role of Ethnicity in Weight Gain after 12 Months of Exacaftor/Tezacaftor/Ivacaftor in Children with Cystic Fibrosis. Diabetes, 72(Supplement_1).
Beck RW, Russell SJ, Damiano ER, El-Khatib FH, Ruedy KJ, Balliro C, Li Z, Calhoun P. A Multicenter Randomized Trial Evaluating Fast-Acting Insulin Aspart in the Bionic Pancreas in Adults with Type 1 Diabetes. Diabetes Technol Ther. 2022 Oct;24(10):681-696. doi: 10.1089/dia.2022.0167. PMID: 36173235; PMCID: PMC9529301.
Messer LH, Buckingham BA, Cogen F, Daniels M, Forlenza G, Jafri RZ, Mauras N, Muir A, Wadwa RP, White PC, Russell SJ, Damiano ER, El-Khatib FH, Ruedy KJ, Balliro CA, Li Z, Marak MC, Calhoun P, Beck RW. Positive Impact of the Bionic Pancreas on Diabetes Control in Youth 6-17 Years Old with Type 1 Diabetes: A Multicenter Randomized Trial. Diabetes Technol Ther. 2022 Oct;24(10):712-725. doi: 10.1089/dia.2022.0201.pub. PMID: 36173237; PMCID: PMC9529304.
Lynch J, Kanapka LG, Russell SJ, Damiano ER, El-Khatib FH, Ruedy KJ, Balliro C, Calhoun P, Beck RW.The Insulin-Only Bionic Pancreas Pivotal Trial Extension Study: A Multi-Center Single-Arm Evaluation of the Insulin-Only Configuration of the Bionic Pancreas in Adults and Youth with Type 1 Diabetes. Diabetes Technol Ther. 2022 Oct;24(10):726-736. doi: 10.1089/dia.2022.0341. PMID: 36173238; PMCID: PMC9529297.
Bionic Pancreas Research Group, Multicenter, Randomized Trial of a Bionic Pancreas in Type 1 Diabetes. N Engl J Med. 2022 Sep 29;387(13):1161-1172. doi: 10.1056/NEJMoa2205225. PMID: 36170500.
He, S., Ryu, J., Liu, J., Luo, H., Lv, Y., Langlais, P. R., ... & Dong, L. Q. (2021). LRG1 is an adipokine that mediates obesity-induced hepatosteatosis and insulin resistance. The Journal of clinical investigation, 131(24).
Nadeau, K. J., Arslanian, S., Bacha, F., Caprio, S., Chan, C., Chao, L. C., ... & TODAY Study Group. Effect of Early Glycemic Control in Youth-Onset Type 2 Diabetes on Longer-Term Glycemic Control and β-Cell Function: Results From the TODAY Study. Diabetes Care.
