The present disclosure provides compositions and methods based on the use of 15-PGDH as a therapeutic target in rejuvenation of aging non-skeletal muscle tissues and/or organs. The 15-PGDH inhibitor SW033291 administered intraperitoneally for 4 weeks resulted in restoration of follicular structure and re-establishment of the marginal zone in spleens of 25 month old mice. Treatment of 25 month old mice with SW033291 also reduced the levels of IL10, IL6, BTC, GM-CSF, IL 13 back to levels similar 0 to 4 month old mice.

The present disclosure provides methods of improving, enhancing, and/or rejuvernating neuromuscular junction morphology and/or function in a subject by administering to the subject an amount of a 15-PGDH inhibitor effective to inhibit 15-PGDH activity and/or reduce 15-PGDH levels in the subject. The methods described herein are useful for treating subjects afflicted with neurogenic myopathies, aged-induced loss of muscle mass, genetic neuromuscular wasting disorders, or after trauma or injury, among others.

The present disclosure relates to recombinant oncolytic viral vectors for the treatment and prevention of cancers such as glioblastoma. The oncolytic viral vectors comprise one or more of the following features: miRNA target sequence(s) for viral replication restriction; transgene(s) encoding one or more payload molecules; a retargeting domain; mutation(s) in both UL30 and UL23 genes; and a protein with a syncytial mutation and a counterpart protein without the syncytial mutation.