Parisa Nejati, Armita Ghahremaninia, Ali Mzaherinezhad,
Volume 18, Issue 5 (8-2015)
Abstract
Background: Subacromial impingement is one of the most common complaints of shoulder. Treatments include avoiding of painful activities, oral anti-pain drugs, physical therapy modalities, corticosteroid injection and exercise therapy. Some studies have shown that platelet- rich plasma(PRP) is effective on tendinitis and tearing of tendons, ligaments and muscles, but evidence that has proved PRP as a conservative treatment in shoulder pathologies is very limited. This study aims to investigate the effect of PRP injection on relieving pain and improving daily function of patients with shoulder impingement syndrome.
Materials and Methods: In this clinical trial study, patients older than 40 with pain more than three months were included. If they had three of four positive diagnostic clinical tests of shoulder impingement that were confirmed by shoulder MRI, could be injected PRP twice. The time between injections was 1 month. Pain was measured by visual analog scale (VAS) and function was measured by two questionnaires named disabilities of the arm, shoulder and hand (DASH) and western Ontario rotator cuff (WORC) index. Range of motion (ROM) of shoulder was measured in five directions by goniometry . All of these parameters were evaluated before intervention and in 1, 3, 6 months later.
Results: with due attention to a six-month folloe-up, PRR injection was effective in pain reduction and improvement of patient's function (p<0.05). Shoulder Rom increased in all directions except external rotation and the power of shoulder muscles was evidently improved statistically in flexion, abduction and internal toration.
Conclusion: PRP injection could effectively reduce pain and improve daily activities in patients with shoulder impingement syndrome.
Mahsa Soltani, Elham Shojafar, Ali Asghar Ghafarizadeh, Azam Moslemi, Maryam Baazm,
Volume 28, Issue 6 (1-2026)
Abstract
Introduction: Sperm cryopreservation is a crucial method for preserving fertility in patients with asthenoteratozoospermia. However, this process can lead to a reduction in sperm parameters due to the production of free radicals and damage to the cell membrane. Various substances are added to the cryopreservation medium to prevent cellular damage. In this study, platelet-rich plasma (PRP), which contains growth factors and bioactive molecules, was used to improve sperm parameters after freezing.
Methods: Semen samples were collected from 20 men diagnosed with asthenoteratozoospermia. The samples were randomly divided into five groups: control (no PRP), PRP50, PRP100, PRP200, and PRP400. Homologous PRP was prepared and added to the respective groups. The sperm samples were cryopreserved in liquid nitrogen. Twenty days after freezing, samples were thawed and subjected to a comprehensive evaluation of viability, motility, morphology, malondialdehyde (MDA) levels, and DNA fragmentation using specific assay kits. The findings were evaluated using one-way analysis of variance followed by Tukey's post hoc test.
Results: The results of this study demonstrated that cryopreservation led to a significant decrease in all sperm parameters in the control group. The addition of PRP at concentrations of 50 and 400 among the concentrations used resulted in a significant increase in total motility, progressive and non-progressive motility, sperm viability, and a decrease in immotile sperm, DNA fragmentation, and MDA levels compared to the control group (p<0.05).
Conclusions: Cryopreservation and subsequent thawing can have detrimental effects on the biological properties of sperm samples. Therefore, the dose-dependent addition of platelet-rich plasma as a cryoprotectant may offer a promising approach to mitigate the negative impacts of freezing on samples from men with asthenoteratozoospermia.
