Amouzegar, A., Chauhan, S.K. and Dana, R. 2016. Alloimmunity and tolerance in corneal transplantation. J. Immunol., 196: 3983–3991.

Bustin, S.A. 2002. Quantification of mRNA using real-time reverse transcription PCR (RT-PCR): trends and problems. J. Mol. Endocrinol., 29: 23-39.

Chelladuraai, S., Singh, K., Gopinathan, A. and Agrawal R. K. 2019. Evaluation of three different impression cytology techniques for RNA retrieval from canine ocular surface epithelial cells. Res. J. Biotechnol., 14(10): 2278-4535

El Annan, J., Goyal, S., Zhang, Q., Freeman, G.J., Sharpe, A.H. and Dana, R. 2010. Regulation of T-cell chemotaxis by programmed death-ligand 1 (PD-L1) in dry eye-associated corneal inflammation. Invest. Ophthalmol. Vis. Sci., 51: 3418-3423.

Featherstone, H.J., Sansom, J. and Heinrich, C.L. 2001. The use of porcine small intestinal submucosa in ten cases of feline corneal disease. Vet. Ophthalmol., 4: 147-153.

Goulle, F. 2012. Use of porcine small intestinal submucosa for corneal reconstruction in dogs and cats: 106 cases. J. Small Anim. Pract., 53: 34–43.

Hori, J., Joyce, N.C. and Streilein, J.W. 2000. Immune privilege and immunogenicity reside among different layers of the mouse cornea. Invest. Ophthalmol. Vis. Sci., 41: 3032-3042.

Hori, J., Wang, M., Miyashita, M., Tanemoto, K., Takahashi, H., Takemori, T., Okumura, K., Yagita, H. and Azumae, M. 2006. B7-H1-induced apoptosis as a mechanism of immune privilege of corneal allografts. J. Immunol., 177: 5928-5935.

John C., Gopinathan A., Singh, K., Sharma, P., Sowbharenya, C. and Sarangom, S.B. 2018. Clinical evaluation of topical tacrolimus ointment usage in different stages of keratoconjunctivitis sicca in dogs. Turk. J. Vet. Anim. Sci., 42: 259-268.

John, C., Gopinathan, A., Singh, K., Sharma, P., Sowbharenya, C. and Sarangom, S.B. 2018. Clinical evaluation of topical tacrolimus ointment usage in different stages of keratoconjunctivitis sicca in dogs. Turk. J. Vet. Anim. Sci., 42: 259-268.

John, C., Gopinathan, A., Singh, K., Sowbharenya, C., Kumar, N., Sahoo, M., and Agrawal, R.K. 2020. Conjunctival Immunocytochemistry with Interferon Gamma and Caspase 3 for Clinical Staging of Keratoconjunctivitis Sicca (KCS) in Dogs. Int. J. Curr. Microbiol. App. Sci. 9: 2952-2961

Kobayashi, M., Kawano, S., Hatachi, S., Kurimoto, C., Okazaki, T., Iwai, Y., Honjo, T., Tanaka, Y., Minato, N., Komori, T., Maeda, S. and Kumagai, S. 2005. Enhanced expression of programmed death-1 (PD-1)/PD-L1 in salivary glands of patients with Sjögren’s syndrome. J. Rheumatol., 32: 2156– 2163.

Kong, L., Ogawa, N., Nakabayashi, T., Liu, G.T., D’Souza, E., McGuff, H.S., Guerrero, D., Talal, N. and Dang, H. 1997. Fas and Fas ligand expression in the salivary glands of patients with primary Sjögren’s syndrome. Arthritis Rheum., 40: 87– 97.

Kropp, B.P. and Cheng, E.Y. 2000. Bioengineering organs using small intestinal submucosa scaffolds: in-vivo tissueengineering technology. J. Endourol., 14: 59-62.

Kumar, A., Gopinathan, A., Singh, K., Sasikala, R. and Swapana, C.R. 2020. Effect of tacrolimus treatment on tear fluid cytokines of Keratoconjunctivitis sicca affected dogs. Int. J. Curr. Microbiol. App. Sci., 9(9): 3347-3356.

Moore, P.A. 2003. Diagnosis and management of chronic corneal epithelial defects (Indolent corneal ulcerations). Clin. Tech. Small Anim. Pract., 18: 168-177.

Morita, M., Fujita, N., Takahashi, A., Nam, E.R., Yui, S., Chung, C.S., Kawahara, N., Lin, H.Y., Tsuzuki, K., Nakagawa, T. and Nishimura, R. 2015. Evaluation of ABCG2 and p63 expression in canine cornea and cultivated corneal epithelial cells. Vet. Ophthalmol., 18: 59–68.

Sangeetha, P., Maiti, S., Sharma, N.K., Singh, K., Gopinathan, A., Ninu, A., Remya, V., Sivanarayanan, T., Mohsina, A., Mohan, D. and Mahan, P.T. 2016. Development of bioengineered corneal matrix for reconstructive surgery of eye. Trends Biomater. Artif. Organs., 30: 85-89.

Shen, L., Jin, Y., Freeman, G.J., Sharpe, A.H. and Dana, M.R. 2007. The function of donor versus recipient programmed death-ligand 1 in corneal allograft survival. J. Immunol., 179: 3672-3679.

Singh, K., Gopinathan, A., Sangeetha, P., Kumar, N. and Singh, K.P. 2016. Development and clinical application of decellularized porcine SIS and cornea for the repair of corneal defects in animals. Indian J. Anim. Sci., 86: 1391–1395.

Singh, K., Gopinathan, A., Sangeetha, P., Kumar, N. and Singh, K.P. 2016. Development and clinical application of decellularized porcine SIS and cornea for the repair of corneal defects in animals. Indian J. Anim. Sci., 86: 1391–1395.

Sowbharenya, C., Singh, K., Gopinathan, A. and Sarangom, S.B. 2019. Decellularized porcine small intestinal submucosa for the repair of deep corneal ulcer in dogs. Int. J. Adv. Res. Biol. Sci., 9: 14-18.

Swapana, C.R., Gopinathan, A., Singh, K., Sasikala, R., Kumar, A., Chelladuraai, S., Kumar, N., Sahoo, M. and Agrawal, R.K. 2020. Down-regulation of rho GTPase-activating protein 7 (DLC1) in tear film and modulation of rho GTPase dynamics by Rosuvastatin in dogs suffering from keratoconjunctivitis sicca. J. Anim. Res., 10(6): 889-898.

Turner, H.C., Budak, M.T., Akinci, M.A. and Wolosin, J.M. 2007. Comparative analysis of human conjunctival and corneal epithelial gene expression with oligonucleotide microarrays. Invest. Ophthalmol. Vis. Sci., 48: 2050-2061.