Dogs homozygous for missense mutations in the SOD1 gene develop a late-onset neuromuscular disorder called degenerative myelopathy (DM) that has many similarities to amyotrophic lateral sclerosis (ALS). Both disorders are characterized by widespread progressive declines in motor functions accompanied by atrophic changes in the descending spinal cord tracts , and some forms of ALS are also associated with SOD1 mutations. In end-stage ALS, death usually occurs as a result of respiratory failure due to severe functional impairment of respiratory muscles. The mechanisms that lead to this loss of function are not known. Dogs with DM are euthanized at all stages of disease progression providing an opportunity to characterize the onset and progression of any pathological changes in the respiratory muscles that may precede respiratory failure. To characterize such potential disease-related pathology we evaluated intercostal muscles from Boxer and Pembroke Welsh Corgi dogs that were euthanized at various stages of DM disease progression. DM was found to result in intercostal muscle atrophy, fibrosis, increased variability in muscle fiber size and shape, and an alteration in muscle fiber type composition. This pathology was not accompanied by retraction of the motor neuron terminals from the muscle acetylcholine receptor complexes, suggesting that the muscle atrophy did not result from physical denervation. These findings provide a better understanding of the mechanisms that likely lead to respiratory failure in at least some forms of ALS and will be useful in the development and evaluation of potential therapeutic interventions using the DM model.

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Vaginal rejuvenation is a marketing term that encompasses surgical and medical treatments for functional vaginal/vulvar problems including but not limited to genitourinary syndrome of menopause (GSM), sexual dysfunction, vaginal laxity, and stress urinary incontinence (SUI) and for esthetic concerns including dissatisfaction with vulvovaginal appearance. Multiple treatment options have become available for indications of functional vaginal problems. Noninvasive management options including the use of more novel treatments such as energy-based devices have gained interest. Previously, studies regarding the efficacy and safety of the energy-based devices for functional vaginal problems were mostly limited to cohort studies without sham treatment, control groups, randomization, or double blinding. As a result of this insufficient data in 2018, the FDA released a statement of warning against the use of energy-based devices in the treatment of functional vaginal problems or vaginal cosmetic procedures (Https://Www.Fda.Gov/Medical-Devices/Safety-Communications/Fda-Warns-Against-Use-Energy-Based-Devices-Perform-Vaginal-Rejuvenation-or-Vaginal-Cosmetic. 1–4, 2018). Purpose of Review This article reviews the most current treatment modalities in the realm of vaginal rejuvenation therapy with an emphasis on the efficacy and safety of the energy-based devices. Recent Findings In the most recent literature, there have been studies with improvements in study design that support the efficacy and the short-term safety of the energy-based devices. Summary More recent studies with improved study design evidence that the use of energy-based devices results in improvements in functional vaginal problems and that serious adverse events appear to be rare. The availability of these devices as treatment options for functional vaginal problems has the potential to impact patient by improving their symptoms and quality of life. Caution still remains however regarding their safety following a longer period of time after their use.