|Year : 2018 | Volume
| Issue : 3 | Page : 224-228
Bimatoprost in dermatology
Abhijeet K Jha1, Rashmi Sarkar2, Uday K Udayan1, PK Roy1, Amar K Jha1, R. K. P Chaudhary1
1 Department of Skin and V.D, Patna Medical College and Hospital, Patna, Bihar, India
2 Department of Dermatology, Maulana Azad Medical College, New Delhi, India
|Date of Web Publication||2-May-2018|
Abhijeet K Jha
Department of Skin and V.D, Patna Medical College and Hospital, Patna, Bihar
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Bimatoprost is a prostamide analogue used for treatment of glaucoma in ophthalmology. Surprisingly, the side effects such as increased pigmentation of eyelids and hypertrichosis in patients being treated with prostaglandin analogues for glaucoma have opened new areas of application in various dermatological disorders such as alopecia mainly affecting eyelashes, eyebrows, and vitiligo.
Keywords: Alopecia areata, bimatoprost, vitiligo
|How to cite this article:|
Jha AK, Sarkar R, Udayan UK, Roy P K, Jha AK, Chaudhary R. Bimatoprost in dermatology. Indian Dermatol Online J 2018;9:224-8
|How to cite this URL:|
Jha AK, Sarkar R, Udayan UK, Roy P K, Jha AK, Chaudhary R. Bimatoprost in dermatology. Indian Dermatol Online J [serial online] 2018 [cited 2020 Aug 14];9:224-8. Available from: http://www.idoj.in/text.asp?2018/9/3/224/231725
| Introduction|| |
Bimatoprost is a synthetic prostamide F2a analog. The prostamides and their structural analogs are structurally, pharmacologically, and functionally distinct from prostaglandins and prostaglandin analogs.,, The free acid of bimatoprost is identical to that of latanoprost, the only exception being a double, instead of single, bond at the carbon 13–14 positions. Bimatoprost exerts its effects by stimulating the prostamide receptor, which is pharmacologically distinct from F prostanoid (FP) receptors., Prostaglandin receptors involved in the development and regrowth of the hair follicle have been identified throughout the hair follicle, particularly in the dermal papilla and outer root sheath., Although there is no therapeutic approach toincreasefollicle numbers, changes in the hair cycle, induced physiologically or pharmacologically, can affect the number and quality of hair visible to clinicians and patients. Unlike their effects on scalp hair, androgens have no effect on eyelash growth. Clinical studies related to the efficacy, safety, and mechanisms of action of bimatoprost in various dermatological disorders are presented. Cochrane database was searched using keywords bimatoprost, dermatology, eyebrow and eyelash hypotrichosis, alopecia, and vitiligo.
Mechanism of Action
The mechanism by which bimatoprost 0.03% ophthalmic solution affects eyelash growth is yet to be fully elucidated. In a study using a murine model, the bimatoprost-treated group demonstrated a significantly greater proportion of anagen follicles and a decrease in telogen and late catagen follicles, suggesting that bimatoprost extends the duration of anagen phase. Bimatoprost 0.03% may influence the growth cycle of eyelashes by stimulating follicles to enter anagen earlier and remain there longer., Eyelash hair follicles, in particular, are known to be proportionally higher in the telogen phase, which supports the effectiveness of bimatoprost for hypotrichosis of the eyelashes. Bimatoprost-induced periocular hyperpigmentation is caused by increased melanogenesis without concomitant proliferation of melanocytes, cellular atypia, or evidence of an inflammatory reaction.
Indications of Bimatoprost
- Eyelash hypotrichosis
Other off label uses:
- Eyebrow hypotrichosis
- Androgenetic alopecia
- Alopecia areata (AA)
Others with minimal evidence:
| What Is the Evidence|| |
Cochrane database was searched using keywords bimatoprost, eyebrow, eyelash, and hypotrichosis. The studies on safety and efficacy of bimatoprost in eyebrow and eyelash hypotrichosis due to various etiologies have been summarized in [Table 1].
|Table 1: Studies showing effect of bimatoprost in various dermatological disorders|
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Alopecia involving eyelashes and eyebrows:
In December 2008, the US Food and Drug Administration approved the use of bimatoprost (an analog of prostaglandin F2a [PGF2a]) ophthalmic solution, 0.03% (Latisse, Allergan Inc, Irvine, CA), for hypotrichosis of the eyelashes, after reports of trichomegaly (increased eyelash growth) in patients with glaucoma receiving prostaglandin analog treatment.
In a 3-month bimatoprost versus latanoprost trial for reducing intraocular pressure, th e side effects profile for hyperemia and eyelash growth were more common in the bimatoprost group thanlatanoprost. Roseborough et al. analyzed the use of latanoprost and bimatoprost for eyelash alopecia areata. After 16 weeks of treatment, no appreciable eyelash regrowth was observed. Vila et al. evaluated patients'eyelash growth every 4 months in patients with alopecia a reata universalis without ocular disease. Patients were given 0.03% bimatoprost to be applied tothe eyelid margin once a day over the course of 1 year. They observed complete growth in 24.32%, moderate growth in 18.91%, slight growth in 27.02%, and no response in 29.72%; 43.23% of the patients had an acceptable cosmetic response (total and moderate growth). Morris et al. performed study to assess the use of a topical PGF2a analog for chemotherapy-induced madarosis. They created a gel base instead of ophthalmic solution. After 3 months of treatment, there was a significant increase in eyelash length (P = 0.02) and thickness (P = 0.01). There was one double-masked, randomized, and placebo-controlled study as safety and efficacy of bimatoprost solution 0.03% topical application in patients with chemotherapy-induced eyelash loss. The other study was a randomized double-blind vehicle controlled pilot study on treatment of eyebrow hypotrichosis using bimatoprost: A randomized, double-blind, vehicle-controlled pilot study by Beer et al. Wirta et al. showed that the responder rate was significantly higher with bimatoprost versus vehicle at month 4 and month 6. Significant improvements favoring bimatoprost occurred in eyelash length (P = 0.008), thickness (P < 0.001), or darkness (P = 0.029) at month 4, with similar results at month 6.
| Androgenetic Alopecia|| |
Khidhir et al. analyzed the effects of bimatoprost on cultured scalp hair follicles, and found concentration-dependent increased follicular growth rate, increased number of anagen follicles. A PGF2a receptor antagonist negated this effect, confirming a direct receptor-medicated mechanism.
| Alopecia Areata|| |
Zaher et al. compared the efficacy and safety of bimatoprost to those of corticosteroid in the treatment of scalp AA. Thirty adult patients with patchy AA were included. Two AA patches were randomly assigned to treatment either by mometasone furoate 0.1% cream once daily (area A) or bimatoprost 0.03% solution twice daily (area B) for 3 months. All responding AA patches showed significant reduction in their severity of alopecia tool score (SALT score) after therapy. Those patches where bimatoprost 0.03% solution (area B) was used demonstrated significantly better results regarding rapidity of response in weeks, percentage of hair re-growth, and side effects compared to other area (area A).
| Hypopigmentary Disorders and Vitiligo|| |
Kapur et al. investigated light microscopic and ultrastructural changes in bimatoprost-induced skin hyperpigmentation. Eyelid biopsy specimens from bimatoprost-treated patients and matched controls were examined by light microscopy and transmission electron microscopy. Using an image analyzer, melanin granules were counted on Fontana–Masson-stained sections, and melanosomes were counted on electron micrographs. They concluded that bimatoprost-induced periocular hyperpigmentation is caused by increased melanogenesis without concomitant proliferation of melanocytes, cellular atypia, or evidence of an inflammatory reaction. Another study by Anbar et al. evaluated the local effect of latanoprost, bimatoprost, and travoprost on skin pigmentation. The role of combination with narrow band UVB (NBUVB) with each of these drugs was also evaluated. Study involved 18 female adult wild guinea pigs with patchy white and red/brown fur. Increased pigmentation was found in all areas with PGF2a analogues with and without NB-UVB. However, the former group had more effect both clinically and histopathologically. In one study, patient had stable periocular vitiligo resistant to topical modalities such as tacrolimus and topical steroids. Patient was prescribed bimatoprost 0.03% ophthalmic solution which was to be applied once daily, after six weeks of follow up there was partial repigmentation of the depigmented area but the treatment was stopped due to localized hypertrichosis. Another study showed that there was partial repigmentation of the area along with some improvement in the leucotrichia. Grimes et al. showed bimatoprost alone or with mometasone provided greater repigmentation than treatment with mometasone alone.
| Limitations and Safety Profile|| |
Apart from eyelash growth, the most common adverse events reported when bimatoprost is administered as an eyedrop (for the treatment of ocular hypertension) are conjunctival hyperemia, eye pruritus, eye dryness, burning sensation in the eye, eyelid pigmentation, foreign body sensation, eye pain, and visual disturbance.,, Localized unwanted hypertrichosis in aesthetic areas could be an issue in treating patients with vitiligo. Iris pigmentation changes are associated with the ability of the agent to stimulate melanogenesis and are aesthetic in nature and do not appear to present any safety concerns, such as melanocyte proliferation. Few patients had periorbital fat atrophy as a side effect of topical ophthalmic bimatoprost therapy.,,,, It is possible that less exposure of the ocular tissues to bimatoprost when applied topically accounts for the differences in the safety profile of the drug. Recommended application of bimatoprost 0.03% ophthalmic solution is one drop daily for 16 weeks. The shortcoming of bimatoprost preparation in Indian setting seems to be its cost. Treatment with bimatoprost increases the eyelash and eyebrow hair growth, and has some success in the treatment of alopecia areata.
| Conclusion|| |
Bimatoprost seems useful in treating eyelash hypotrichosis. The efficacy of bimatoprost on alopecia areata, androgenetic alopecia, vitiligo, and hypopigmentary disorders is still in infancy phase and needs more evidence.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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