Treatment Of Androgenetic Alopecia Research Articles

The use of phototherapy with different wavelengths in the treatment of Androgenetic Alopecia

Introduction: Phototherapy has been identified as a safe, non-invasive, and promising resource for the treatment of Androgenetic Alopecia (AGA). The aim of this study was to evaluate the effects of phototherapy on the treatment of AGA using two different wavelengths: red and blue. Both red and blue light, under the parameters tested in this study, allowed an increase in hair density, a reduction in the central parting, and promoted an increase in the number of terminal hairs after the treatments, as well as a reduction in vellus hairs. Methodology: Ten volunteers were selected (GLV n=5) and (GLA N=5), all diagnosed with AGA and approved by the ethics committee with opinion number 5,761,579. Interventions were carried out using Vênus equipment (MMOptics, São Carlos, Brazil) with Group GLV λ=660nm, 4J and Group GLA λ=440 nm, 4J. The interventions were performed once a week, for 90 days, totaling 12 treatment sessions. Hair progression was assessed by photographic record and the ratio of vellus to terminal hairs was performed by digital trichoscopy imaging (Dino Lite; New Taipei City, Taiwan, China). Results and Conclusion: Both red and blue light, under the parameters tested in this study, allowed an increase in hair density, a reduction in the central parting, and promoted an increase in the number of terminal hairs after the treatments, as well as a reduction in vellus hairs.

Incorporation of Finasteride-Loaded Microspheres into Personalized Microneedle for Sustained Transdermal Delivery.

Although finasteride (FNS) tablets are considered the most effective drug for the treatment of androgenetic alopecia (AGA), their clinical applications are limited due to the associated side effects including decreased libido, breast enlargement, and liver dysfunction. In this study, we have developed a personalized microneedle (PMN) with a double-layer structure that incorporates FNS-loaded microspheres (MPs) to accommodate irregular skin surfaces. This design enables the sustained release of FNS, thereby reducing potential side effects. The needle body was synthesized with high-strength hyaluronic acid (HA) as the base material substrate. The backing layer utilized methacrylate gelatin (GelMA) with specific toughness, enabling PMN to penetrate the skin while adapting to various skin environments. The length of PMN needles (10 × 10) was approximately 600 μm, with the bottom of the needles measuring about 330 μm × 330 μm. The distance between adjacent tips was around 600 μm, allowing the drug to penetrate the stratum corneum of the skin. The results of the drug release investigation indicated the sustained and regulated release of FNS from PMN, as compared to that of pure FNS and FNS-MPs. Further, the cytotoxicity assay demonstrates that PMS displays good cytocompatibility. Altogether, this mode of administration has immense potential for the development of delivery of other drugs, as well as in the medical field.

A Randomized Controlled, Single-Observer Blinded Study on the Safety and Efficacy of a Combination of 678nm Helmet-Type Low-level Laser Therapy and Topical Minoxidil 5% Versus Topical Minoxidil 5% Alone in the Treatment of Male Androgenetic Alopecia

Male pattern androgenetic alopecia is a chronic, progressive condition with significant social and psychological impact. Few preliminary researches have been done on the role of low-level laser therapy as a treatment modality for male pattern hair loss. This is a randomized, controlled, single-observer blinded clinical trial conducted from November 2019 to October 2021 at the East Avenue Medical Center Dermatology Out-Patient Department on the use of low-level laser therapy and topical minoxidil for the treatment of androgenetic alopecia. Twenty-four male adults with Norwood Hamilton Hair Loss Scale of IIa to V were randomly assigned into 2 groups: a control group (monotherapy with topical minoxidil 5%) and a treatment group (678 nm helmet-type low-level laser therapy and topical minoxidil 5%). A statistically significant higher increase in hair density was observed in the treatment group (14.58 and 15.08 for the right and left sides, respectively) compared to the control (5.83 on the right and 5.50 on the left, respectively, p=.000 <.05). In addition, the investigator’s global photographic assessment and patient satisfaction were also significantly higher. Both treatments were well tolerated. The results of this study show that 678 nm helmet-type low-level laser therapy is an effective adjunctive treatment modality to topical minoxidil 5% solution for the treatment of male androgenetic alopecia.

Hydrogel forming microneedles loaded with VEGF and Ritlecitinib/polyhydroxyalkanoates nanoparticles for mini-invasive androgenetic alopecia treatment

Androgenetic alopecia (AGA), the most prevalent clinical hair loss, lacks safe and effective treatments due to downregulated angiogenic genes and insufficient vascularization in the perifollicular microenvironment of the bald scalp in AGA patients. In this study, a hyaluronic acid (HA) based hydrogel-formed microneedle (MN) was designed, referred to as V-R-MNs, which was simultaneously loaded with vascular endothelial growth factor (VEGF) and the novel hair loss drug Ritlecitinib, the latter is encapsulated in slowly biodegradable polyhydroxyalkanoates (PHAs) nanoparticles (R-PHA NPs) for minimally invasive AGA treatment. The integration of HA based hydrogel alongside PHA nanoparticles significantly bolstered the mechanical characteristics of microneedles and enhanced skin penetration efficiency. Due to the biosafety, mechanical strength, and controlled degradation properties of HA hydrogel formed microneedles, V-R-MNs can effectively penetrate the skin's stratum corneum, facilitating the direct delivery of VEGF and Ritlecitinib in a minimally invasive, painless and long-term sustained release manner. V-R-MNs not only promoted angiogenesis and improve the immune microenvironment around the hair follicle to promote the proliferation and development of hair follicle cells, but also the application of MNs to the skin to produce certain mechanical stimulation could also promote angiogenesis. In comparison to the clinical drug minoxidil for AGA treatment, the hair regeneration effect of V-R-MN in AGA model mice is characterized by a rapid onset of the anagen phase, improved hair quality, and greater coverage. This introduces a new, clinically safer, and more efficient strategy for AGA treatment, and serving as a reference for the treatment of other related diseases.

Persistent Gynecomastia due to Short-term Low-dose Finasteride for Androgenetic Alopecia.

We report a case of persistent gynecomastia in a healthy 20-year-old man after 1 month of low-dose finasteride. Finasteride was discontinued after 2 months, and gynecomastia was unchanged 5 months after drug withdrawal. The gynecomastia regressed but did not resolve after 6 months of treatment with raloxifene, a selective estrogen receptor modulator. One year later, bilateral mammoplasty was performed to remove the remaining breast tissue. Finasteride, a 5-alpha-reductase inhibitor, is widely used for the treatment of androgenetic alopecia. Gynecomastia is an expected side effect of this therapy given its mechanism of action. However, only 8 cases of gynecomastia have been reported with low-dose (1 mg daily) finasteride treatment since its approval for androgenetic alopecia in 1997. This raises the concern that gynecomastia resulting from low-dose finasteride is significantly underreported, causing inadequately informed patients. Further, because of the risk of gynecomastia, it is important for prescribing physicians to counsel patients regarding this complication and to consider early intervention when finasteride-induced gynecomastia first arises to prevent fibrosis and thus irreversible gynecomastia.

Efficacy of topical minoxidil in enhancing beard growth in a group of transgender assigned female at birth individuals on gender affirming hormone therapy

PurposeTestosterone therapy represents the cornerstone of gender affirming hormone therapy (GAHT) among t-AFAB (transgender Assigned Female At Birth) people. Minoxidil is a vasodilator drug approved for topical use for the treatment of androgenetic alopecia. The aim of the present study was to evaluate the efficacy of topical minoxidil in enhancing beard growth in a group of t-AFAB people on GAHT.MethodsSixteen t-AFAB individuals with an incomplete beard development, on GAHT for at least 6 months, were enrolled. Topical minoxidil was applied to the interested facial areas. Before starting (T0), after 3 (T3) and 6 (T6) months, we evaluated facial hair growth using the Ferriman-Gallwey modified score (FGm).ResultsSubjects were 26 (2.7) years old and on GAHT for 18.5 [15–54] months; using a paired match evaluation, a statistically significant facial hair growth was observed over time, in particular at T6 (median upper lip FGm 3.5 [3–4] vs 2 [1–2] at T0 and chin FGm 4 [3.25–4] vs 1 [1–2] at T0; p ≤ 0.002). Comparing the minoxidil group with a control group (n = 16) matched for age and BMI who developed a full-grown beard only with GAHT, a logistic multivariable analysis identified hirsutism before GAHT was independently positively associated with the development of a full beard [OR 15.22 (95% CI 1.46–158.82); p = 0.023].ConclusionsThis is the first study demonstrating the efficacy of topical minoxidil in enhancing facial hair growth among t-AFAB people on GAHT. Further studies will be necessary to assess whether the obtained improvements will persist after discontinuing the medication.

Comparison between dutasteride and finasteride in hair regrowth and reversal of miniaturization in male and female androgenetic alopecia: a systematic review

Nowadays androgenetic alopecia (AGA) has become a common concern of affected subjects of both sexes. Finasteride is approved by the Food and Drug Administration for the treatment of male AGA. There is no clear evidence to support the use of dutasteride in male AGA. In female AGA, the effectiveness of dutasteride and finasteride is still under debate, and there is no clear evidence to use any of them in female AGA. A systematic review was conducted to compare between dutasteride and finasteride in treating both male and female AGA, and their efficacy, safety, side effects with effective dosage. The review was done using several databases including: PubMed, Ovid Medline, Google Scholar, and Cochrane using the following search terms/keywords: "Dutasteride" AND "Finasteride" AND "Male pattern hair loss" AND "Female pattern hair loss" AND "Efficacy", "Tolerability" AND "Side effects" AND "Comparison". To search for articles related to efficacy, tolerability, side effects, used doses of dutasteride and finasteride in the treatment of male and female AGA. The review encompassed a total of nine studies. Four randomized controlled trials, one single-arm trial, two prospective cohorts, and two retrospective cohort studies. Seven studies exclusively enrolled male participants, while only two included female participants. All groups receiving various doses of dutasteride and finasteride exhibited a significant increase in hair count compared to the placebo group. Notably, dutasteride (0.5 mg) and dutasteride (2.5 mg) were significantly more effective than finasteride (1 mg) in increasing hair counts. Furthermore, no significant difference in adverse events was observed between finasteride and dutasteride. Dutasteride is more potent than finasteride in treating AGA in both males and females. All the adverse events between finasteride and dutasteride were comparable.

Oral Minoxidil vs Topical Minoxidil for Male Androgenetic Alopecia

There has been increased interest in low-dose oral minoxidil for androgenetic alopecia (AGA) treatment. However, the efficacy of oral minoxidil for male AGA is yet to be evaluated in comparative therapeutic trials. To compare the efficacy, safety, and tolerability of daily oral minoxidil, 5 mg, vs twice-daily topical minoxidil, 5%, for 24 weeks in the treatment of male AGA. This double-blind, placebo-controlled randomized clinical trial was conducted at a single specialized clinic in Brazil. Eligible men with AGA aged 18 to 55 years classified using the Norwood-Hamilton scale as 3V, 4V, or 5V were included and randomized. Data were collected from January to December 2021, and data were analyzed from September 2022 to February 2023. Participants were randomized 1:1 into 2 groups: oral minoxidil, 5 mg, daily and topical placebo solution; or 1 mL of topical minoxidil, 5%, twice daily and oral placebo for 24 weeks. The primary outcome was change in terminal hair density on the frontal and vertex regions of the scalp. The secondary outcomes were change in total hair density and photographic evaluation. Among 90 enrolled participants, 68 completed the study; of these, the mean (SD) age was 36.6 (7.8) years. A total of 33 participants were enrolled in the oral minoxidil group and 35 in the topical treatment group. Both groups were homogenous in terms of demographic data and AGA severity. For the frontal area, the mean change from baseline to week 24 between groups was 3.1 hairs per cm2 (95% CI, -18.2 to 21.5; P = .27) for terminal hair density and 2.6 hairs per cm2 (95% CI, -10.3 to 15.8; P = .32) for total hair density. For the vertex area, the mean change from baseline to week 24 was 23.4 hairs per cm2 (95% CI, -0.3 to 43.0; P = .09) for terminal density and 5.5 hairs per cm2 (95% CI, -12.5 to 23.5; P = .32) for total hair density. According to the photographic analysis, oral minoxidil was superior to topical minoxidil on the vertex (24%; 95% CI, 0 to 48; P = .04) but not on the frontal scalp (12%; 95% CI, -12 to 36; P = .24). The most common adverse effects in the oral minoxidil group were hypertrichosis (22 of 45 [49%]) and headache (6 of 45 [14%]). In this study, oral minoxidil, 5 mg, once per day for 24 weeks did not demonstrate superiority over topical minoxidil, 5%, twice per day in men with AGA. Brazilian Registry of Clinical Trials Identifier: RBR-252w9r.

Pilose antler extract promotes hair growth in androgenic alopecia mice by promoting the initial anagen phase

Androgenetic alopecia (AGA) is a prevalent disease in worldwide, local application or oral are often used to treat AGA, however, effective treatments for AGA are currently limited. In this work, we observed the promoting the initial anagen phase effect of pilose antler extract (PAE) on hair regeneration in AGA mice. We found that PAE accelerated hair growth and increased the degree of skin blackness by non-invasive in vivo methods including camera, optical coherence tomography and dermoscopy. Meanwhile, HE staining of sagittal and coronal skin sections revealed that PAE augmented the quantity and length of hair follicles, while also enhancing skin thickness and hair papilla diameter. Furthermore, PAE facilitated the shift of the growth cycle from the telogen to the anagen phase and expedited the proliferation of hair follicle stem cells and matrix cells in mice with AGA. This acceleration enabled the hair follicles to enter the growth phase at an earlier stage. PAE upregulated the expression of the sonic hedgehog (SHH), smoothened receptor, glioma-associated hemolog1 (GLI1), and downregulated the expression of bone morphogenetic protein 4 (BMP4), recombinant mothers against decapentaplegic homolog (Smad) 1 and 5 phosphorylation. This evidence suggests that PAE fosters hair growth and facilitates the transition of the growth cycle from the telogen to the anagen phase in AGA mice. This effect is achieved by enhancing the proliferation of follicle stem cells and matrix cells through the activation of the SHH/GLI pathway and suppression of the BMP/Smad pathway.

Utilising SNP Association Analysis as a Prospective Approach for Personalising Androgenetic Alopecia Treatment.

Androgenetic alopecia (AGA) is a prevalent, multifactorial form of hair loss involving complex aetiological factors, such as altered androgen regulation and energy metabolism. Existing treatments offer limited success, thus highlighting the need for advanced, personalised therapeutic strategies. This study focuses on correlating the genetic mechanisms of AGA with molecular targets involved in the response to current treatment modalities. An anonymised database including 26,607 patients was subjected to analysis. The dataset included information on patients' genotypes in 26 single nucleotide polymorphisms (SNPs), specifically, and diagnosed AGA grades, representing a broad range of ethnic backgrounds. In our sample, 64.6% of males and 35.4% of females were diagnosed with female pattern hair loss. This distribution aligns well with prior studies, thus validating the representativeness of our dataset. AGA grading was classified using the Hamilton-Norwood and Ludwig scales, although no association was found to the grade of the disease. SNP association analysis revealed eight SNPs, namely rs13283456 (PTGES2), rs523349 (SRD5A2), rs1800012 (COL1A1), rs4343 (ACE), rs10782665 (PTGFR), rs533116 (PTGDR2), rs12724719 (CRABP2) and rs545659 (PTGDR2), to be statistically significant with a p-value below 0.05. The study establishes a preliminary association between eight specific SNPs and AGA. These genetic markers offer insights into the variability of therapeutic responses, thus underlining the importance of personalised treatment approaches. Our findings show the potential for more targeted research to understand these SNPs' and further roles in AGA pathophysiology and in modulating treatment response.

Microneedle Delivery Platform Integrated with Codelivery Nanoliposomes for Effective and Safe Androgenetic Alopecia Treatment.

Although topical application of minoxidil is a widely used, FDA-approved therapy for androgenetic alopecia (AGA) treatment, it suffers from low bioavailability, the requirement for frequent long-term use, and side effects. With a similar structure as minoxidil, kopexil and kopyrrol are less toxic and have been commercialized, but show an inferior hair regeneration effect compared to minoxidil. Herein, we developed a hyaluronic acid (HA)-based dissolvable microneedles (MNs) delivery platform integrated with kopexil and kopyrrol coencapsulated nanoliposomes (KK-NLPs) to effectively and safely treat AGA. Facilitated by nanoliposomes and MNs, the encapsulated KK-NLPs performed efficient skin penetration and enhanced cellular internalization into human dermal papilla cells. Furthermore, within the target cells, the codelivered kopexil and kopyrrol show synergistic effects by orchestrating an upregulation in the expression of Ki67, β-catenin, vascular endothelial growth factor (VEGF), and CD31. These molecular responses collectively foster cell proliferation, migration, and antioxidative effects, thereby facilitating the expedited progression of hair follicles (HFs) into the anagen phase and promoting peripheral angiogenesis. Notably, the KK-NLPs-integrated MNs treatment group exhibits noteworthy enhanced hair regeneration in vivo, with identical or superior therapeutic effects at a much lower dosage than that of minoxidil. These results suggest the great potential of this kopexil and kopyrrol codelivery nanoliposomes-integrated MNs platform for AGA treatment in a safe and efficient way.

Enhancing Quality of Life and Sexual Functioning in Female Androgenetic Alopecia: Therapeutic Potential of Hair Follicle-Derived Stem Cells.

The study aimed to examine the impact of stem cell treatment on quality of life (QoL) and sexual functioning in women with androgenetic alopecia (AGA). Twenty-three women underwent a single session of autologous cellular micrografts (ACMs). The World Health Organization Quality of Life Brief Version (WHOQOL-BREF) and Female Sexual Function Index (FSFI) were used before and after 6 months. The AGA severity decreased by an average of 1 point on the Ludwig scale (p = 0.004) after treatment. FSFI scores indicated sexual dysfunction in over half of the women at baseline, but they improved significantly post-treatment for arousal [median (IQR): 4.8 (1.5) vs. 5.10 (0.9); p = 0.035] and satisfaction [4.4 (1.4) vs. 4.8 (1.8); p = 0.025]. QoL scores improved after treatment in psychological health (57.96 ± 19.0 vs. 69.35 ± 14.0; p = 0.031) and environment (72.96 ± 13.4 vs. 81.09 ± 12.6; p = 0.007), but not in physical health and social relationships. No associations were found between the WHOQOL-BREF or FSFI domains versus age and AGA severity. AGA reduces QoL and impacts sexual functioning in women with AGA. The high treatment burden arises from the chronic and progressive nature of AGA, coupled with limited treatment effectiveness. Effective treatments for AGA, like ACM, are urgently needed to enhance patient-reported outcomes along with clinical results.

Survey of Dermatology Practitioners' Opinions and Prescribing Habits of Oral Minoxidil for the Treatment of Androgenetic Alopecia.

Utilization of low-dose oral minoxidil has increased in recent years in association with several clinical studies that have shown its efficacy in treating androgenetic alopecia (AGA).  Objective: To assess dermatology providers' attitudes and recommendation behaviors of oral minoxidil for the treatment of AGA. An online survey gauging the professional opinions, prescribing behaviors, and use of oral minoxidil was sent using the Orlando Dermatology Aesthetic and Clinical Conference email listserv which included multiple levels of dermatology practitioners including MD/DOs, NPs, and PAs across the United States. Overall, the survey was sent to 2200 providers, and 201 (9.1%) responses were collected. 81% (n=139) of respondents supported the use of oral minoxidil for AGA. Support varied significantly (P=.03) by providers' number of years in practice with those in practice for greater than 30 years with the least amount of support. 92% of respondents (130, n=141) reported feeling comfortable prescribing oral minoxidil, and 83% (116, n=140) found oral minoxidil to be better than its topical formulation. 78% (108, n=139) felt their patients were satisfied with their results, and 89% (124, n=140) felt oral minoxidil was well tolerated by their patients. This study found that most prescribers use oral minoxidil as a treatment for AGA and find it to be an effective and tolerable option for patients. Support for oral minoxidil was significantly impacted by providers' years in practice. J Drugs Dermatol. 2024;23(3): doi:10.36849/JDD.7519.

Higher percentage of CD34+ stem cells and elevated efficacy in androgenetic alopecia treatment observed in CGF prepared from 640 nm laser-pretreated blood: A preliminary study.

Concentrated growth factor (CGF) injection has proven effective in treating androgenetic alopecia (AGA). The primary mechanism of CGF in treating AGA is thought to be the CD34+ stem cells and platelets-associated growth factors being injected into the scalp. CGF efficacy in treating AGA may rely on the activation level of these stem cells and platelets. The 640 nm laser is a United States Food and Drug Administration approved AGA treatment that activates follicle stem cells. Therefore, we hypothesize that pretreating CGF with a 640 nm laser may further activate CD34+ stem cells and platelets, thereby improving the efficacy of CGF in treating AGA. This study aims to investigate whether 640 nm laser pretreated CGF (640CGF) has a greater effect in treating AGA than 640 nm laser non-pretreated CGF (N640CGF) and evaluate whether 640 nm laser pretreatment changed CD34+ cell percentage. This study enrolled 10 patients (8 male, 2 female) with AGA aged 18-60 years who received CGF injections. The 640CGF group was pretreated with a 640 nm laser at an energy density of 4 J/cm2, with a 30 cm irradiation distance for 30 min. Half of the scalp was treated with 640CGF, whereas the other half was treated with N640CGF. The injection was prepared by a doctor who did not know which blood tube had been pretreated. The treatment efficacy was evaluated using a trichoscope 1 month after injection. All 10 (100%) patients participated in the follow-up visit, and a higher quantity of new hairs was observed on the side injected with 640CGF than N640CGF (p = 0.019). Additionally, fewer malnourished hairs were observed on the 640CGF pretreated side (p = 0.015). No serious adverse events were reported. A higher percentage of CD34+ stem cells and improved efficacy in AGA treatment could be observed with CGF prepared from 640 nm laser-pretreated blood.

What's Old Is New Again

ABSTRACT In recent years, multiple novel and improved therapies have become available to treat alopecia disorders. Whereas many therapeutics are entirely new, some medications, such as oral minoxidil, have been available for years and are just now being revisited as potentially valuable hair loss treatments. This article discusses the risks, benefits, and potential side effects of the off-label use of low-dose oral minoxidil. It compares low-dose oral minoxidil with topical minoxidil, a well-established and FDA-approved treatment for androgenetic alopecia, but one that is often associated with poor overall adherence. Finally, nursing considerations in the education and care of patients with alopecia disorders and associated medications are discussed.

Synergistic treatment of androgenetic alopecia with follicular co-delivery of minoxidil and cedrol in metal–organic frameworks stabilized by covalently cross-linked cyclodextrins

Androgenetic alopecia seriously affects the physical and mental health of patients. The main clinical therapeutic agent, minoxidil tincture, is challenged by solvent irritation and dose-dependent side effects. Our recent work has identified a biosafety natural product, cedrol, that is synergistic in combination with minoxidil, thereby improving medication safety by substantially reducing the clinical dose of minoxidil. In addition, ccross-linked CD-MOF were designed as carriers for hair follicle delivery, and γ-CD in the carriers was cross-linked by diphenyl carbonate with covalent bonds to protect the CD-MOF from rapid disintegration in an aqueous environment. This improved nanocarrier has a drug loading of 25%, whereas nanocarriers increased drug delivery to the hair follicles through ratchet effect, and increased human dermal papilla cells uptake of drugs via endocytosis pathways mainly mediated by lattice proteins, energy-dependent active transport, and lipid raft-dependent, thus improved cell viability, proliferation, and migration, followed by significantly enhancing the anti-androgenetic alopecia effect, with cedrol focusing on inhibiting 5α-reductase and activating Shh/Gli pathway, and minoxidil, which up-regulated VEGF, down-regulated TGF-β, and activated ERK/AKT pathway. This drug combination provides a new therapeutic strategy for androgenetic alopecia, while the newly developed cross-linked CD-MOF has been shown to serve as a promising follicular delivery vehicle.

The role of laser and energy-assisted drug delivery in the treatment of alopecia.

It has been recently established that laser treatment can be combined with topical or intralesional medications to enhance the delivery of drugs and improve overall results in a variety of different dermatological disorders. The aim of this review is to evaluate the use of laser and energy-assisted drug delivery (LEADD) for the treatment of alopecia with a specific focus on ablative fractional lasers (AFL), non-ablative fractional lasers (NAFL), and radiofrequency microneedling (RFMN). A comprehensive PubMed search was performed in December 2022 for "laser-assisted drug delivery" as well as "laser" and "alopecia." The evidence regarding LEADD for alopecia treatment is limited to two specific alopecia subtypes: alopecia areata (AA) and androgenetic alopecia (AGA)/pattern hair loss (PHL). LEADD with minoxidil and platelet-rich plasma (PRP) were evaluated for efficacy in both treatments of AA and AGA. LEADD with topical corticosteroids and intralesional methotrexate were studied for the treatment of AA, while LEADD with growth factors and stem cells were studied for the treatment of AGA. Multiple RCTs evaluated LEADD for topical corticosteroids with ablative fractional lasers for the treatment of AA. There is evidence in the literature that supports the use of topical minoxidil in combination with all devices for the treatment of AGA/PHL. All the reviewed studies show a positive treatment effect with LADD; however, some trials did not find LEADD to be superior to monotherapy or microneedling-assisted drug delivery. LEADD is a rapidly emerging treatment modality for the treatment of AGA and AA.

Natural bioactive compounds as potential sources for alleviation and treatment of androgenetic alopecia: A research advance

AbstractAlopecia is a common chronic skin disease, which can be categorized as androgenetic alopecia (AGA), scarring line alopecia, genetic alopecia, and chemical alopecia due to the different reasons. Among which AGA caused by metabolism of the androgen system accounts for the majority. Due to the high prevalence of AGA and the lack of an effective cure, the urgent search for a safe and effective anti‐AGA drug has been our aim. With the advantages of its own wide source and low toxicity and side effects, the use of natural bioactive compounds and their extracts in the treatment of AGA has been a research hotspot. The objective of this work is to compile and synthesize experimental findings on natural bioactive compounds that possess the potential to alleviate AGA. On the basis of the known pathogenesis of AGA, combined with the target analysis of AGA by network pharmacology, identify natural bioactive compounds and their signaling pathways for the treatment of alopecia and hair growth promotion, and select representative hotspot compounds, to reveal their specific mechanisms and abstract the commonalities. Based on previous extensive research, hundreds of AGA targets (e.g., Wnt, TGF, and VEGF) closely regulate neogenesis, tissue development, and vascular function, to collect and summarize compounds such as ginseng, baicalein, curcumin, and so on, which have great potential to improve hair growth. Our work will inspire future research based on their mechanisms of action, providing more complete evidence and ideas for the feasibility of developing natural anti‐AGA drugs.

Role of oral minoxidil in the treatment of androgenetic alopecia

Patterned hair loss is the most common cause of alopecia, typically presenting with progressive thinning, miniaturization, and loss of hair at classical topography depending on the sex of the patient. In the 1970s, Minoxidil was used to treat severe refractory hypertension due to its vasodilator properties. It became popular after its coincidental finding on the promotion of hair growth and stimulation of new hair production. In 1988, the Food and Drug Administration approved topical minoxidil (TM) 2% for the treatment of male androgenetic alopecia and in 1992, for female pattern hair loss. It is also used as an off-label treatment for other hair loss conditions such as telogen effluvium and alopecia areata. However, there are frequent reports of TM-induced contact dermatitis and its reversible effect, which has reduced compliance in the patients and resulted in a poor outcome. Hence, they have studied using low-dose oral minoxidil (LDOM), which showed good efficacy and safety profile in the treatment of patterned hair loss along with avoidance of high-risk adverse cardiac effects that resulted due to doses used for hypertension. The added advantages of LDOM over topical formulation are good compliance, cost savings, effective in people with low hair follicle sulfotransferase activity, and the possibility of cotherapy with other topical or oral medications.

The role of platelet-rich plasma in androgenetic alopecia: A systematic review.

Androgenetic alopecia (AGA), also referred to as male or female pattern hair loss, is the commonest cause of chronic hair loss and affects up to 80% of men by the age of 70. Despite a high prevalence, there are few approved therapies, which show minimal efficacy. This systematic review aims to evaluate the efficacy of platelet-rich plasma (PrP) in the treatment of AGA in male patients. MEDLINE, EMBASE, Cochrane (CENTRAL), CINAHL, clinicaltrials.gov, Google Scholar and the Science Citation Index database were searched to identify eligible studies. All randomized controlled trials (RCTs) and prospective cohort studies related to PrP use in AGA were included. Primary outcomes included changes in hair density and hair count. Methodological quality was assessed using bias assessment tools. EightRCTs and one cohort study were included in the review with a total of 291 participants. Six studies reported a statistically significant increase in hair density in the PrP group versus the control. Five studies reported a statistically significant increase in hair count with PrP. Seven studies showed moderate risk and two showed lowrisk of bias. In a methodologically robust review on the effectiveness of PrP on male AGA, PrP demonstrated some potential to be used therapeutically. However, the low quality of evidence, moderate risk of bias, and high heterogeneity of included studies limit inferences and call for more robust designs to investigate this further.