جستجوی مقالات مرتبط با کلیدواژه "botulinum toxin type a" در نشریات گروه "پزشکی"

Context: 

Acne is a common skin condition characterized by chronic inflammation of the pilosebaceous unit. Increased sebum production is a key component of acne pathogenesis. Various therapies are available for acne, including topical, systemic, and physical treatments. Botulinum toxin is increasingly used in facial cosmetic procedures. Observations suggest that botulinum toxin type A (BoNT-A) may reduce sebum levels in the face. This finding could potentially lead to the development of a new treatment for oily skin and acne.

Evidence Acquisition: 

A retrospective literature review was conducted by searching the PubMed, Web of Science, EMBASE, and SCOPUS databases using keywords such as "acne," "acne treatment," "oily skin," and "botulinum toxin type A." The review focused on studies that assessed the impact of BoNT-A on patients with acne vulgaris and oily skin, as well as studies that measured skin sebum levels and pore size following BoNT-A application.

Nine studies were reviewed. Of these, two evaluated the effects of BoNT-A on 30 and 35 patients with acne vulgaris. Four studies assessed sebum reduction in 20, 50, 42, and 20 patients. Three studies evaluated both sebum reduction and pore size tightening in 10, 25, and 20 patients. Eight studies demonstrated that the application of BoNT-A has a positive effect on patients with acne and reduces sebum production in facial skin. Only one study, which evaluated both sebum reduction and pore size tightening, found no significant effect. Overall, the studies indicate that BoNT-A application can positively impact acne and reduce facial sebum production. Specifically, intradermal application of BoNT-A at low dosages can help reduce acne, sebum production, and tighten pores.

BoNT-A shows promise as a treatment for acne and oily skin. While cost-effectiveness may be a challenge for some patients, the benefits of BoNT-A make it a treatment option worth considering. With further studies to optimize dosages and determine the longest duration of efficacy, BoNT-A has the potential to revolutionize the treatment of acne and oily skin.

Context:

Diabetes is one of the most common causes of neuropathy. Morbidity and mortality increase in patients suffering from diabetic polyneuropathy and are experienced by approximately 10 to 54% of diabetic patients. Severe pain, loss of sensation, increased risk of ulceration, andevenamputationare the complications of diabetic neuropathy. Intradermal injection of botulinum toxin type-A (BTX-A) is a relatively novel method for the treatment of painful diabetic neuropathy. This method is becoming popular considering its acceptable and long-lasting pain control and minimal systemic side effects.

This narrative systematic review aimed to evaluate the effectiveness of intradermal BTX-A injection on painful diabetic neuropathy. The queried databases included PubMed, EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL), ClinicalTrials.gov,Web of Science, Scopus, and Google Scholar. The final search was performed in February 2022, and no time limits were set for the search. All the relevant clinical trials were included. The inclusion criteria and search strategy were set as follows: type of study: randomized clinical trial (RCT) or other types of interventional studies; publication date: all published studies until February 22, 2022; sample size: no restrictions; outcomes: effect on diabetic neuropathy pain; quality: earning a minimum acceptable score based on critical appraisal; and language: English. The searches and article screening were performed by two independent reviewers to minimize the possibility of bias. In case of disagreement about a study, the comments of an expert (as a third person) were used to resolve the ambiguity.

In a review of 4 RCTs and 1 case-control study on the effectiveness of BTX-A in reducing the pain of diabetic neuropathy, 273 patients were evaluated in total. The lowest and highest number of subjects was 18 and 141. The sex distribution included 43.22% men and 56.77% women, all of whom were 47.8 to 74.8 years old. Three studies were conducted in Iran, Taiwan, and Egypt. The results of this reviewshowedsignificantimprovementin pain reduction, e.g., basedonthe visual analog scale (VAS)andNeuropathic Pain Scale (NPS). A few studies evaluated sleep and psychosocial complications, and their results indicated a statistically significant improvement in the Pittsburgh Sleep Quality Index (PSQI) and the physical subscale of the 36-Item Short Form Survey (SF-36).

The results of this systematic review demonstrated that intradermal injection of BTX-A causes significant and long-term (up to 12 weeks) improvement in diabetic neuropathy pain. The improvement in sleep and mental or physical functions was not consistent, and no conclusive result could be reached.

A suitable pharmacological substitute for the well-established surgical delay technique for axial skin flaps regarding increasing viability is elusive. We aimed to evaluate the effects of botulinum toxin type A (BTA) on the axial skin flap survival in a rat model.

The present controlled experimental study was performed in Kerman University of Medical Science, Kermanshah, Iran during 2016-2017 on three groups of rats. Group 1 (control group) had no preconditioning while Groups 2 and 3 were preconditioned by the intradermal injection of normal saline (0.5 ml) in the cephalic end of the skin flap and the injection of the BTA (1.6 units Neuronex) reconstituted in normal saline, respectively. Two weeks after this intervention in each group, the flap was raised and kept in situ and a biopsy was simultaneously taken for evaluating neoangiogenesis, followed by evaluating flap necrosis after two weeks of following-up by photography.

Although BTA induced angiogenesis significantly, it failed to reduce the area of necrosis compared to the other groups.

BTA was effective in increasing angiogenesis in the axial skin flap although it was unable to reduce necrosis.

Glioblastoma multiforme (GBM) is the most type of brain malignancy in adults. Radical excision surgery, chemotherapy, and radiotherapy in some cases are still unsuccessful, and most patients with GBM die within 3 to 6 months following diagnosis. Botulinum toxin type A (BtxA) has cellular toxin effects and suppresses the cell division of certain types of cancer cell lines in vivo and in vitro study. The present study designed to evaluate the apoptotic effect of BtxA on the GBM cell line.

U87-MG GBM cell line cultured according to the routing protocols, divided into 2 groups including, trial (BtxA treated) and control groups. Cells of the trial group exposed to different doses of BtxA. The cell viability, cycle arrest, and pro-apoptotic proteins evaluated respectively by MTT assay, subG1, and Western blotting.

MTT assay showed that the viability of the BtxA treated cells at doses of 1.45 Unit and other doses after 24 to 48 hours, significantly decreased (P<0.001) compared to the control groups. Apoptosis percentage of the subG1 test also indicated that 1.45 unit dose significantly increased in the cells exposed to BtxA compared to the control group in 24 hours. The expression of P53 and caspase 3 proteins indicated a significant increase.

BtxA induces apoptosis in U87-MG cell line via p53 and caspase 3 pathways and could have clinical applications. In vivo studies need to confirm the clinical application of the present findings.