Experience
- 1998-present: Poultry Immunologist/Endocrinologist, The Pennsylvania State University
- 1995-1996: Postdoctoral Research Scientist (Molecular Biology), The Pennsylvania State University
- 1987-1994: Graduate Research Assistant (Immunology/Endocrinology), The Pennsylvania State University
- 1982-1985: Surgical Technician, Lewistown Hospital
Accomplishments
- Developed assay to measure hormone production by leukocytes
- Determined corticotropin releasing factor (CRF) stimulates adrenocorticotropic hormone production by chicken leukocytes
- Identified macrophage as the primary leukocyte responsible for immune adrenocorticotropic hormone production
- Developed assay to measure chicken adiponectin hormone
Awards
- Member, Gamma Sigma Delta Agricultural Honor Society
- PA Poultry Federation Graduate Scholarship, 1991
Recent Publications
Hendricks III, G. L., J. A. Hadley, S. M. Krzysik-Walker, K. S. Prabhu, R. Vasilatos-Younken, and R. Ramachandran. 2009. Unique profile of chicken adiponectin, a predominantly heavy molecular weight multimer, and relationship to visceral adiposity. Endocrinology (In press).
Ocon-Grove, O. M., S. M. Krzysik-Walker, S. R. Maddineni, G. L. Hendricks III, and R. Ramachandran. 2008. Adiponectin and its receptors are expressed in the chicken testis: influence of sexual maturation on testicular ADIPOR1 and ADIPOR2 mRNA abundance. Reproduction 136:627-638.
Maddineni, S., O. M. Ocon-Grove, S. M. Krzysik-Walker, G. L. Hendricks III, J. A. Proudman, and R. Ramachandran. 2008. Gonadotropin inhibitory hormone receptor expression in the chicken pituitary gland: potential influence of sexual maturation and ovarian steroids. J. Neuroendocrinol. 20:1078-1088.
Krzysik-Walker, S. M., O. M. Ocon-Grove, S. R. Maddineni, G. L. Hendricks III, and R. Ramachandran. 2008. Is visfatin an adipokine or myokine? Evidence for greater visfatin expression in skeletal muscle than visceral fat in chickens. Endocrinology 149:1543-1550.
Ocon-Grove, O. M., S. R. Maddineni, G. L. Hendricks III, R. G. Elkin, J. A. Proudman, and R. Ramachandran. 2007. Pituitary progesterone receptor expression and plasma gonadotrophin concentrations in the reproductively dysfunctional mutant restricted ovulator chicken. Dom. Anim. Endocrinol. 32:201-215.
Maddineni, S. R., S. M. Krzysik-Walker, O. M. Ocon-Grove, G. L. Hendricks III, and R. Ramachandran. 2007. Calcitonin is expressed in the chicken pituitary gland: Influence of gonadal steroids and sexual maturation. Cell Tissue Res. 327:521-528.
Maddineni, S., O. M. Ocon-Grove, S. M. Krzysik-Walker, G. L. Hendricks III, and R. Ramachandran. 2007. Gonadotropin inhibitory hormone (GnIH) receptor gene is expressed in the chicken ovary: potential role of GnIH in follicular maturation. Reproduction 135:267-274.
Krzysik-Walker, S. M., O. M. Ocon-Grove, S. Maddineni, G. L. Hendricks III, and R. Ramachandran. 2007. Identification of calcitonin expression in the chicken ovary: influence of follicular maturation and ovarian steroids. Biol. Reprod. 77:626-635.
Abbas, A. O., A. E. Gehad, G. L. Hendricks III, H. B. A. Gharib, and M. M. Mashaly. 2007. The effect of lighting program and melatonin on the alleviation of the negative impact of heat stress on the immune response in broiler chickens. Int. J. Poult. Sci. 6:651-660.
Maddineni, S., S. Metzger, O. Ocon, G. Hendricks III, and R. Ramachandran. 2005. Adiponectin gene is expressed in multiple tissues in the chicken: Food deprivation influences adiponectin messenger ribonucleic acid expression. Endocrinology 146:4250-4256.
Mashaly, M. M., G. L. Hendricks III, M. A. Kalamah, A. E. Gehad, A. O. Abbas and P. Patterson. 2004. Effect of heat stress on production parameters and immune responses of commercial laying hens. Poult. Sci. 83:889-94.
A. E. Gehad, H. S. Lillehoj, G. L. Hendricks III, and M. M. Mashaly. 2002. Initiation of humoral immunity I. The role of cytokines and hormones in the initiation of humoral immunity using T-independent and T-dependent antigens. Dev. Comp. Immunol. 26:751-759.
A. E. Gehad, H. S. Lillehoj, G. L. Hendricks III, and M. M. Mashaly. 2002. Initiation of humoral immunity II. The effects of T-independent and T-dependent antigens on the distribution of lymphocyte populations. Dev. Comp. Immunol. 26:761-771.
C. P. Brennan, G. L. Hendricks III, T. M. El-Sheikh, and M. M. Mashaly. 2002. Melatonin and the enhancement of immune responses in immature male chickens. Poult. Sci. 81:371-375.
