keyword
MENU ▼
Read by QxMD icon Read
search

Leukocyte poor platelet rich plasma

keyword
https://www.readbyqxmd.com/read/29211968/men-and-women-differ-in-the-biochemical-composition-of-platelet-rich-plasma
#1
Grace Xiong, Nithya Lingampalli, Jayme C B Koltsov, Lawrence L Leung, Nidhi Bhutani, William H Robinson, Constance R Chu
BACKGROUND: Autologous platelet-rich plasma (PRP) is widely used for a variety of clinical applications. However, clinical outcome studies have not consistently shown positive effects. The composition of PRP differs based on many factors. An improved understanding of factors influencing the composition of PRP is important for the optimization of PRP use. HYPOTHESIS: Age and sex influence the PRP composition in healthy patients. STUDY DESIGN: Controlled laboratory study...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29130636/efficacy-of-subcutaneous-injection-of-platelet-rich-plasma-in-alopecia-a-clinical-and-histological-pilot-study-on-a-rat-model-with-a-six-month-long-term-follow-up-experience
#2
Sophie Orliac, Jean-Michel Serfaty, Anne Perozziello, Olivier Zurlinden, Liliane Louedec, Benjamin Dallaudière
PURPOSE: To assess the potential of platelet-rich plasma (PRP) subcutaneous injection of to treat alopecia and to evaluate local toxicity. MATERIALS-METHODS: Twelve Hairless rats were used. At D0, we performed systematic clinical examination and divided the rat back into four quadrants (Q). We initiated subcutaneous injection using either PRP in PRPQ+, platelet-poor plasma (PPP) in PPPQ+, physiological serum (PS) in PSQ+, or no treatment (Q4). At D7, D14, D21, and D28 but also second month (M2), M3, M4, M5, rats had exactly the same injection procedure...
November 11, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29125811/does-leukocyte-poor-or-leukocyte-rich-platelet-rich-plasma-applied-with-biopolymers-have-superiority-to-conventional-platelet-rich-plasma-applications-on-chondrocyte-proliferation
#3
Duygu Yaşar Şirin, İbrahim Yılmaz, Mehmet İsyar, Kadir Öznam, Mahir Mahiroğulları
OBJECTIVES: This study aims to investigate the possible effects of leukocyte concentration in the content of platelet-rich plasma (PRP) and the administration of PRP using a drug delivery system on chondrocyte proliferation in vitro conditions. PATIENTS AND METHODS: Blood from nine male patients (mean age 65 years; range 49 to 81 years) with advanced stage osteoarthritis who had not responded to medical or conservative treatments and underwent total knee arthroplasty was used to prepare two formulations: PRP with low concentration leukocytes (2000-4000 leukocytes/µL) was designated as pure PRP (P-PRP), whereas PRP with high concentration leukocytes (9000-11000 leukocytes/µL) as leukocyte-rich PRP (L-PRP)...
December 2017: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/29099894/effects-of-platelet-rich-plasma-and-indomethacin-on-biomechanics-of-rotator-cuff-repair
#4
Molly C Meadows, David M Levy, Christopher M Ferry, Thomas R Gardner, Takeshi Teratani, Christopher S Ahmad
We conducted a study to determine if platelet-rich plasma (PRP) enhances the strength of rotator cuff repair (RCR) and if concomitant use of nonsteroidal anti-inflammatory drugs (NSAIDs) affects PRP efficacy. We also wanted to determine the optimal centrifugation protocol for making PRP from rats. This study used 48 rats, 14 in a centrifugation protocol and 34 in an operative protocol. Six syngeneic rats from the operative group were used as PRP blood donors; the other 28 operative rats underwent bilateral RCRs...
September 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28962103/erythrocyte-sedimentation-rate-and-fibrinogen-concentration-of-whole-blood-influences-the-cellular-composition-of-platelet-rich-plasma-obtained-from-centrifugation-methods
#5
Wenjing Yin, Zhengliang Xu, Jiagen Sheng, Xuetao Xie, Changqing Zhang
Erythrocyte sedimentation rate (ESR), which reflects the sedimentation rate of platelets, leukocytes and erythrocytes in response to centrifugal force, may influence the cellular composition of platelet-rich plasma (PRP) obtained via centrifugation methods. However, no relevant studies have substantiated this. In the present study, blood was collected from 40 healthy volunteers and used to prepare PRP with two plasma-based preparation systems [YinPRP and Plasma Rich in Growth Factor (PRGF) systems] and two buffy coat-based systems (RegenPRP and WEGOPRP systems) in a single-donor model...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28560233/evolution-current-status-and-advances-in-application-of-platelet-concentrate-in-periodontics-and-implantology
#6
REVIEW
Amit Arvind Agrawal
Platelet concentrates (PC) [platelet-rich plasma (PRP) and platelet-rich fibrin (PRF)] are frequently used for surgical procedures in medical and dental fields, particularly in oral and maxillofacial surgery, plastic surgery and sports medicine. The objective of all these technologies is to extract all the elements from a blood sample that could be used to improve healing and promote tissue regeneration. Although leukocyte rich and leukocyte poor PRP's have their own place in literature, the importance of non-platelet components in a platelet concentrate remains a mystery...
May 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28375975/autologous-pure-platelet-rich-plasma-dermal-injections-for-facial-skin-rejuvenation-clinical-instrumental-and-flow-cytometry-assessment
#7
Norma Cameli, Maria Mariano, Iole Cordone, Elva Abril, Serena Masi, Maria Laura Foddai
BACKGROUND: Platelet-rich plasma (PRP) is an emerging treatment in dermatology recently proposed for skin rejuvenation. OBJECTIVE: To evaluate the efficacy and safety of autologous pure PRP dermal injections on facial skin rejuvenation, investigating the cellularity of PRP samples. MATERIALS AND METHODS: Twelve patients underwent 3 sessions of PRP injection at 1-month intervals. The clinical and instrumental outcomes were evaluated before (T0) and 1 month (T1) after the end of treatment by means of transepidermal water loss, corneometry, Cutometer, Visioscan, and Visioface...
June 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28301205/intratendon-delivery-of-leukocyte-poor-platelet-rich-plasma-improves-healing-compared-with-leukocyte-rich-platelet-rich-plasma-in-a-rabbit-achilles-tendinopathy-model
#8
Ruijian Yan, Yanjia Gu, Jisheng Ran, Yejun Hu, Zefeng Zheng, Mengfeng Zeng, Boon Chin Heng, Xiao Chen, Zi Yin, Weishan Chen, Weiliang Shen, Hongwei Ouyang
BACKGROUND: Chronic tendinopathy is a commonly occurring clinical problem that affects both athletes and inactive middle-aged patients. Although some studies have shown that different platelet-rich plasma (PRP) preparations could exert various therapeutic effects in vitro, the role of leukocytes in PRP has not yet been defined under tendinopathy conditions in vivo. PURPOSE: This study compared the effects of the intratendon delivery of leukocyte-poor PRP (Lp-PRP) versus leukocyte-rich PRP (Lr-PRP) in a rabbit chronic tendinopathy model in vivo...
July 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28146403/hyaluronic-acid-versus-platelet-rich-plasma-a-prospective-double-blind-randomized-controlled-trial-comparing-clinical-outcomes-and-effects-on-intra-articular-biology-for-the-treatment-of-knee-osteoarthritis
#9
RANDOMIZED CONTROLLED TRIAL
Brian J Cole, Vasili Karas, Kristen Hussey, Kyle Pilz, Lisa A Fortier
BACKGROUND: The use of platelet-rich plasma (PRP) for the treatment of osteoarthritis (OA) has demonstrated mixed clinical outcomes in randomized controlled trials when compared with hyaluronic acid (HA), an accepted nonsurgical treatment for symptomatic OA. Biological analysis of PRP has demonstrated an anti-inflammatory effect on the intra-articular environment. PURPOSE: To compare the clinical and biological effects of an intra-articular injection of PRP with those of an intra-articular injection of HA in patients with mild to moderate knee OA...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28027451/the-use-of-platelet-rich-and-platelet-poor-plasma-to-enhance-differentiation-of-skeletal-myoblasts-implications-for-the-use-of-autologous-blood-products-for-muscle-regeneration
#10
Olga Miroshnychenko, Wen-Teh Chang, Jason L Dragoo
BACKGROUND: Platelet-rich plasma (PRP) has been used to augment tissue repair and regeneration after musculoskeletal injury. However, there is increasing clinical evidence that PRP does not show a consistent clinical effect. Purpose/Hypothesis: This study aimed to compare the effects of the following non-neutrophil-containing (leukocyte-poor) plasma fractions on human skeletal muscle myoblast (HSMM) differentiation: (1) PRP, (2) modified PRP (Mod-PRP), in which transforming growth factor β1 (TGF-β1) and myostatin (MSTN) were depleted, and (3) platelet-poor plasma (PPP)...
March 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28018086/leukocyte-poor-platelet-rich-plasma-to-treat-degenerative-meniscal-tear-a-case-report
#11
J P Betancourt, W D Murrell
A traumatic and/or degenerative meniscus lesion is thought to be a clinical manifestation of early-onset osteoarthritis (OA), which is a chronic progressive condition that can cause substantial pain and disability. Platelet-rich plasma (PRP) is an emerging treatment option that has been reported to improve healing. Here, we present a case of a 29-year-old woman, with left anterior and medial knee pain, without history of trauma or injury. The patient was managed with leukocyte-poor PRP injections derived from her peripheral blood with high concentrations of platelets, platelet-derived growth factors, and bioactive proteins, with a total follow-up of 30 months...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/27506585/leukocyte-poor-platelet-rich-plasma-is-more-effective-than-the-conventional-therapy-with-acetaminophen-for-the-treatment-of-early-knee-osteoarthritis
#12
RANDOMIZED CONTROLLED TRIAL
Mario Simental-Mendía, José F Vílchez-Cavazos, Víctor M Peña-Martínez, Salvador Said-Fernández, Jorge Lara-Arias, Herminia Guadalupe Martínez-Rodríguez
INTRODUCTION: Knee osteoarthritis (OA) is a degenerative and progressive articular cartilage disease. Infiltration of autologous platelet-rich plasma (PRP) has been proposed as a therapeutic alternative due to the content of biologically active cytokines in PRP. We aimed to compare the clinical response of acetaminophen and intra-articular leukocyte-poor PRP (LP-PRP) in early knee OA. MATERIALS AND METHODS: A total of 65 patients with clinically and radiographically documented knee OA (grade 1-2) were analyzed...
December 2016: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27503185/leukocyte-concentration-and-composition-in-platelet-rich-plasma-prp-influences-the-growth-factor-and-protease-concentrations
#13
COMPARATIVE STUDY
Yohei Kobayashi, Yoshitomo Saita, Hirofumi Nishio, Hiroshi Ikeda, Yuji Takazawa, Masashi Nagao, Tomoiku Takaku, Norio Komatsu, Kazuo Kaneko
BACKGROUND: Platelet-rich plasma (PRP) therapy has become an increasingly popular treatment for orthopaedics and sports-related injuries, and various clinically available PRP preparation methods exist. However, the differences in PRP quality among numerous preparation methods remain unclear. Specifically, the benefit of including leukocytes in the PRP product remains controversial, and few studies have been conducted to evaluate the effects of the interaction between platelets and leukocytes on the growth factor concentrations...
September 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27268111/the-effectiveness-of-platelet-rich-plasma-in-the-treatment-of-tendinopathy-a-meta-analysis-of-randomized-controlled-clinical-trials
#14
Jane Fitzpatrick, Max Bulsara, Ming H Zheng
BACKGROUND: Tendinopathy is very common in the general population. There are increasing numbers of clinical studies referring to platelet-rich plasma (PRP) and platelet-poor plasma (PPP) as treatments for tendinopathy. PURPOSE: To perform a meta-analysis of the outcomes of the PRP groups by preparation method and injection technique in tendinopathy. To determine the clinical effectiveness of the preparations and to evaluate the effect of controls used in the studies reviewed...
January 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27217525/platelet-rich-plasma-in-a-murine-model-leukocytes-growth-factors-flt-1-and-muscle-healing
#15
Priscila Martins Andrade Denapoli, Roberta Sessa Stilhano, Sheila Jean McNeill Ingham, Sang Won Han, Rene Jorge Abdalla
BACKGROUND: It is well known that platelet-rich plasma (PRP) preparations are not the same and that not all preparations include white blood cells, but the part that leukocytes play on the healing role of PRP is still unknown. PURPOSE: The primary aim of this study was to evaluate the influence of leukocytes in different PRP preparations with a special emphasis on growth factor concentrations. The secondary aim was to evaluate the influence of PRP on muscle healing...
August 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27161868/the-properties-of-3-different-plasma-formulations-and-their-effects-on-tendinopathic-cells
#16
Eva Rubio-Azpeitia, Ane M Bilbao, Pello Sánchez, Diego Delgado, Isabel Andia
BACKGROUND: Tendinopathies are attributed to failure of the healing process and inadequate tissue remodeling. Plasma injections can trigger regenerative responses by modifying the molecular microenvironment. PURPOSE: To examine the differences in the mitotic, chemotactic, anabolic, and inflammatory effects between leukocyte- and platelet-rich plasma (L-PRP), platelet-rich plasma (PRP), and platelet-poor plasma (PPP). STUDY DESIGN: Controlled laboratory study...
August 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26831629/intra-articular-autologous-conditioned-plasma-injections-provide-safe-and-efficacious-treatment-for-knee-osteoarthritis-an-fda-sanctioned-randomized-double-blind-placebo-controlled-clinical-trial
#17
RANDOMIZED CONTROLLED TRIAL
Patrick A Smith
BACKGROUND: Platelet-rich plasma (PRP) injections have become an intriguing treatment option for osteoarthritis (OA), particularly OA of the knee. Despite the plethora of PRP-related citations, there is a paucity of high-level evidence that is comparable, cohort specific, dose controlled, injection protocol controlled, and double-blinded. PURPOSE: To determine the safety and efficacy of leukocyte-poor PRP autologous conditioned plasma (ACP) for knee OA treatment through a feasibility trial regulated by the US Food and Drug Administration (FDA)...
April 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26390166/autologous-platelet-rich-plasma-evidence-for-clinical-use
#18
REVIEW
Claudia S Cohn, Evelyn Lockhart
PURPOSE OF REVIEW: Autologous platelet-rich plasma (aPRP) is growing in popularity as a therapy to augment wound healing, speed the recovery from muscle and joint injuries, and enhance recovery after surgical repair. High-profile athletes treated with aPRP have increased the demand from the general population. Yet, evidence to support the use of aPRP in most clinical settings is weak, because of poorly controlled clinical trials. RECENT FINDINGS: Preparations of aPRP vary by platelet count, leukocyte content, and degree of platelet activation...
November 2015: Current Opinion in Hematology
https://www.readbyqxmd.com/read/26236743/immunohistochemical-expression-of-collagens-in-the-skin-of-horses-treated-with-leukocyte-poor-platelet-rich-plasma
#19
Maria Verônica de Souza, Mariana Brettas Silva, José de Oliveira Pinto, Marianna Barros de Souza Lima, Júlio Crepaldi, Gabriela Francine Martins Lopes, Hélio Batista dos Santos, Rosy Iara Maciel de Azambuja Ribeiro, Ralph Gruppi Thomé
This study evaluated the immunohistochemical expression of type I (COL I) and III (COL III) collagens during the healing process of skin treated with leukocyte-poor platelet-rich plasma (LP-PRP). Seven healthy gelding crossbred horses aged 16 to 17 years were used. Two rectangle-shaped wounds were created surgically in the right and left gluteal regions. Twelve hours after wound induction, 0.5 mL of the LP-PRP was administered in each edge of the wounds of one of the gluteal regions. The contralateral region was used as control (CG)...
2015: BioMed Research International
https://www.readbyqxmd.com/read/26006082/bradykinin-and-capsaicin-induced-airways-obstruction-in-the-guinea-pig-are-platelet-dependent
#20
S D Keir, D Spina, C P Page
INTRODUCTION: Airways obstruction induced by intravenously administered bradykinin is abolished in guinea pigs treated with indomethacin, which has been shown to be, at least in part thromboxane dependent. As thromboxane is primarily generated from circulating platelets, we investigated whether airways obstruction induced by bradykinin, and other spasmogens, is platelet dependent and the role platelet aggregation played in this response. METHODS: Guinea pigs were chronically treated with busulfan to induce thrombocytopenia...
August 2015: Pulmonary Pharmacology & Therapeutics
keyword
keyword
22360
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"