Muscle atrophy and fibrosis are attenuated after experimental nerve repair associated with heterologous fibrin biopolymer.

Background: Neurotmesis leads to neuromuscular junction (NMJ) degeneration, muscle atrophy, and functional loss. While neurorrhaphy is standard, motor recovery is often incomplete. Heterologous fibrin biopolymer (HFB) shows potential as an adjunct, hence, we investigate HFB's late regenerative effects.

Vitamin E Attenuating Effects Against the Impact of the Herbicide Atrazine on the Diaphragm Muscle of Male Wistar Rats.

Atrazine is an herbicide associated with respiratory disorders and the presence of oxidative stress, which can be reversed by association with antioxidant compounds, such as vitamin E. This study aimed to investigate the impact of atrazine (AZ) on the male rat diaphragm muscle and the attenuating effects of vitamin E. Fifty-two male rats were received for 28 days by gavage ( = 13/group): C (control), corn oil; AZ (100 mg/kg); AZE, AZ (100 mg/kg) and vitamin E (200 mg/kg); E, vitamin E (200 mg/kg).

Heterologous fibrin biopolymer as an emerging approach to peripheral nerve repair: a scoping review.

Nerve injuries present a substantial challenge within the medical domain due to their prevalent occurrence and significant impact. In nerve injuries, a range of physiopathological and metabolic responses come into play to stabilize and repair the resulting damage. A critical concern arises from the disruption of connections at neuromuscular junctions, leading to profound degeneration and substantial loss of muscle function, thereby hampering motor tasks.

Effects of Nandrolone Decanoate on Skeletal Muscle and Neuromuscular Junction of Sedentary and Exercised Rats.

Nandrolone decanoate (ND) is the most widely used among the anabolic androgenic steroids (AAS), synthetic substances derived from testosterone, to improve muscular and health gains associated with exercises. The AAS leads to physical performance enhancement and presents anti-aging properties, but its abuse is associated with several adverse effects. Supraphysiological doses of AAS with or without physical exercise can cause morphological and functional alterations in neuromuscular interactions.

Statin exposure during pregnancy promotes neuromuscular junction alterations in postpartum Wistar rats.

Introduction/aims: The mechanisms that underlie the pathogenesis of statin-associated muscle symptoms (SAMS) remain unclear. Pregnancy is associated with increased cholesterol levels. Statins may be useful during pregnancy, but their safety is uncertain.

Neuroregeneration and immune response after neurorrhaphy are improved with the use of heterologous fibrin biopolymer in addition to suture repair alone.

Introduction/aims: Peripheral nerve injuries result in impaired neuromuscular interactions, leading to morphological and functional alterations. Adjuvant suture repair methods have been used to improve nerve regeneration and modulate the immune response. Heterologous fibrin biopolymer (HFB), a scaffold with adhesive properties, plays a critical role in tissue repair.

Acetylcholine receptors of the neuromuscular junctions present normal distribution after peripheral nerve injury and repair through nerve guidance associated with fibrin biopolymer.

Peripheral nerve injuries (PNI) lead to alterations in the Agrin-LRP4-MuSK pathway. This results in disaggregation of AChRs and change from epsilon (mature, innervated) to gamma (immature, denervated) subunit. Tubulization technique has been shown to be effective for PNI repair and it also allows the use of adjuvants, such as fibrin biopolymer (FB).

Heterologous fibrin biopolymer associated to a single suture stitch enables the return of neuromuscular junction to its mature pattern after peripheral nerve injury.

Denervation leads to severe atrophy of neuromuscular junction (NMJ) structure including decrease of the expression of fundamental proteins. Up to now, conventional suture has been the gold standard method used to correct this injury. Fibrin sealant is one of the alternatives proposed to optimize this method.

Heterologous fibrin sealant potentiates axonal regeneration after peripheral nerve injury with reduction in the number of suture points.

The use of suture associated with heterologous fibrin sealant has been highlighted for reconstruction after peripheral nerve injury, having the advantage of being safe for clinical use. In this study we compared the use of this sealant associated with reduced number of stitches with conventional suture after ischiatic nerve injury. 36 Wistar rats were divided into 4 groups: Control (C), Denervated (D), ischiatic nerve neurotmesis (6 mm gap); Suture (S), epineural anastomosis after 7 days from neurotmesis, Suture + Fibrin Sealant (SFS), anastomosis with only one suture point associated with Fibrin Sealant.