Phytochemical investigation and hair growth studies on the rhizomes of Nardostachys jatamansi DC
Venkateswara Rao Gottumukkala, Tiruganasambandham Annamalai, Triptikumar Mukhopadhyay
M/s. CavinKare Research Centre, 12, Poonamalle Road, Ekkattuthangal, Chennai-600 032, India
|Date of Submission||23-Aug-2010|
|Date of Decision||02-Nov-2010|
|Date of Web Publication||9-May-2011|
Venkateswara Rao Gottumukkala
M/s. CavinKare Research Centre, 12, Poonamalle Road, Ekkattuthangal, Chennai-600 032
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Nardostachys jatamansi DC rhizomes were subjected to extraction, fractionation, and isolation of terpenoid compounds. Three terpenoid compounds were isolated which are nardal, jatamansic acid, and nardin. These compounds were identified based on physical and spectral data (UV, IR, 1 H and 13 C NMR, 2D NMR, Mass) and comparison with authentic compounds. The crude extract, fractions, and two of the isolated compounds were tested for their hair growth activity. The hair growth studies showed good activities for the extract, fraction, and the isolated compounds.
Keywords: Hair growth, jatamansic acid, nardin, Nardostachys jatamansi, rhizomes
|How to cite this article:|
Gottumukkala VR, Annamalai T, Mukhopadhyay T. Phytochemical investigation and hair growth studies on the rhizomes of Nardostachys jatamansi DC. Phcog Mag 2011;7:146-50
|How to cite this URL:|
Gottumukkala VR, Annamalai T, Mukhopadhyay T. Phytochemical investigation and hair growth studies on the rhizomes of Nardostachys jatamansi DC. Phcog Mag [serial online] 2011 [cited 2021 Dec 2];7:146-50. Available from: http://www.phcog.com/text.asp?2011/7/26/146/80674
| Introduction|| |
Nardostachys jatamansi DC (Valerianaceae) is commonly called jatamansi or spikenard in English and it is a small shrub. The rhizomes of the plant were used since antiquity in the indigenous systems of medicine. The rhizomes and roots of plant are used as antistress agents in traditional medicine and marketed in India as an anticonvulsant Ayurvedic drug, Ayush 56.  The rhizome is being used as an aromatic adjunct in the preparation of medicinal oils, to promote growth of hair, and also imparts blackness.  The essential oil obtained from the roots of jatamansi showed fungi toxic activity,  antimicrobial,  antifungal,  hypotensive,  antiarrhythmic,  and anticonvulsant activity. , The rhizomes extracted with 50% ethanol showed hepatoprotective,  hypolipidemic,  and antiarrhythmic activity.  Previous reports on this plant occurring in different regions yielded terpenoids,  alkaloids,  neolignans and lignans,  coumarins, , and other compounds. ,, A few biologically active compounds were also reported. These are BR606 as bone sorption inhibitor for the treatment of osteoporosis and hypercalcemia,  jatamansone (valeranone) as hypotensive and tranquilizing agent,  antiarrhythmic and anticonvulsant agent.  Present study was therefore aimed to isolate and report the chemical constituents present in the hair growth active extract and to study their property.
| Materials and Methods|| |
The rhizomes of N. jatamansi were collected from bazaar in December, 2008 and a voucher specimen was deposited in M/s. CavinKare Research Centre, Chennai.
Melting points reported are uncorrected. UV spectra were recorded on Shimadzu UV spectrophotometer. IR spectra were recorded on a Shimadzu IR prestige 21. 1 H NMR and 13 C NMR spectra were recorded on a Bruker AMX 400 in CDCl 3 with TMS as an internal standard and the chemical shifts being represented in parts per million (ppm, δ values). ESI mass spectrum was recorded on a Jeol SX 102/DA 6000 mass spectrometer. Column chromatography was performed on silica gel (100-200 mesh, Acme synthetic chemicals, Mumbai, India). Fractions and purity of the compounds were monitored by analytical thin-layer chromatography (TLC) and the spots were visualized by exposure to iodine vapor or spraying with 2,4-DNP solution or 5% sulphuric acid in methanol, followed by heating the plate at 110ΊC for 5 minutes. The TLC was performed on precoated silica gel plates (aluminium sheets 20 x 20 cm, silica gel 60 F 254 plates of Merck KGaA, Germany). All solvents and reagents used were of analytical grade obtained from Merck.
Extraction and isolation
The air-dried and finely powdered rhizomes (3.2 kg) were extracted with hexane through soxhlet apparatus for 8 hours. The extract was filtered and evaporated to dryness in vacuo using a rotary evaporator at 40 o C to provide crude hexane extract (109 g). The crude hexane extract was subjected to vacuum liquid chromatography eluted with hexane : chloroform (9 : 1, 1 : 1) and chloroform to get corresponding fractions 25.91 g (Fr. I), 20.52 g (Fr. II), and 55.89 g (Fr. III), respectively. The fractions I and II showed hair growth promotion activity. Part of the fraction II, 8.21 g was subjected to silica gel column chromatography eluted with hexane : chloroform (isocratic, 60 : 40) to yield total of six subfractions, monitored by TLC. Compound 1 (800 mg) was obtained from subfraction 1 eluted with hexane : chloroform (7 : 3) after repeated silica gel chromatography. Compound 2 (69 mg) was obtained from subfraction 3 as colorless solid which was further crystallized in methanol to afford crystalline powder. Compound 3 (41 mg) came as colorless solid from subfraction 5 after passing through silica gel column, which was crystallized with hexane : methanol to obtain colorless crystals.
The isolated compounds were characterized by physical and spectral data and comparison with previously reported literature and additionally, compounds 1 and 3 were further confirmed with authentic samples by co-TLC.
Compound 1: Nardal: colorless oil; 1 H NMR (400 MHz, CDCl 3 ): δ 9.38 (1H, s, CHO), 6.73 (1H, dq, 3-H), 3.73 (1H, dd, J = 4.4, 9.7 Hz, 3'-H), 1.79 (3H, d, J = 1.3 Hz, 2-CH 3 ), 1.64 (3H, s, 9'-CH 3 ), 0.79 (3H, d, J = 7.0 Hz, 5'-CH 3 ).
Compound 2: Jatamansic acid: Colorless crystals, mp: 123-27 o C, 1 H NMR (400 MHz, CDCl 3 ): δ 0.97 (6H, br, 10 and 11-H), 1.05 (3H, d, J = 6.2 Hz, 12-H), 2.43 (1H, septet, 9-H), 3.04 (1H, m, 8a-H), 5.75 (1H, d, J = 6.9 Hz, 6-H), 7.16 (1H, d, J = 6.0 Hz, 7-H).
Compound 3: Nardin: Colorless crystals, mp: 133-34 o C, 1 H NMR (400 MHz, CDCl 3 ): δ 7.19 (1H, d, J = 9.9 Hz, 3-H), 3.55 (1H, m, 3'-H), 1.89 (3H, s, 2-CH 3 ), 1.64 (3H, s, 9'-CH 3 ), 0.79 (3H, d, J = 7.0 Hz, 5'-CH 3 ).
Hair growth promotion activity
The hair growth promotion activity was studied by using in vivo animal model. ,
Female Wistar rats weighing 120 to 150 g, from Dr. MGR Janaki College, Chennai, were used for hair growth study. Based on the guidelines of the ethical committee of the college, the animals were maintained in a clean cage and were provided with food and water ad libitum. The floor mat husk in each cage was removed and laid afresh on daily basis.
Hair growth activity in vivo
The hair on the dorsal portion of the body of each animal was depilated using a standard, commercially available depilatory cream. After removal of the hair, the skin was cleaned with distilled water and wiped with surgical spirit. Four centimeter square area in the depilated dorsal skin was marked with permanent ink marker. The animals which showed any skin irritant response to the depilatory were removed from the experiment and replaced with new animal.
The rats were divided into 3 groups of 6 animals each. Group 1 animals served as negative control without any treatment. The negative control comprised of the vehicle for application (only) without having any active extract/fraction/compound. Group 2 animals were applied 50 μl of commercial 2% Minoxidil solution in the predefined area. The group 3 animals were applied samples (extract/fractions/compounds) prepared in liquid paraffin at 2%. The quantity of the solution used for the experiment was 50 μl per 4 cm sq area per animal. The application of the Minoxidil and the test samples were continued for 30 days. The observations such as hair growth initiation time (HGIT) in days and hair growth completion time (HGCT) in days were recorded for all the animals on daily basis. The HGIT was defined as the presence of new hair in the treated site of 4 cm sq area. The HGCT was defined as complete filling of hair in the treated site of 4 cm sq area in each animal which become indistinguishable from the adjacent untreated portion of the body. The average of HGIT and HGCT was calculated for each group along with control animals. The untreated control for HGIT is 10 days and HGCT is 30 days. The percentage reduction in HGCT (% reduction in HGCT) for the treatment is calculated by the formula given below. The results of hair growth activity are shown in [Table 1].
| Results and Discussions|| |
The preliminary screening of the hexane extract of the rhizomes of N. jatamansi showed positive response in hair growth promotion activity. The bioassay-guided purification of the hexane fractions of the rhizomes of N. jatamansi repeated chromatography with a silica gel and recrystallization with solvents furnished nardal, jatamansic acid, and nardin [Figure 1]. The structure of the compounds were elucidated on the basis of UV, IR, 1 H and 13 C NMR and Mass spectral data and comparison with an authentic samples.
The hair growth promotion activity of nardin and jatamansic acid showed moderate reduction in hair growth time, whereas minoxidil, a positive control showed excellent activity in the standard method but it had other side effects.  Even though the plant is being used in the preparation of hair oils, so far there are no reports on the compounds responsible for hair growth promotion activity.
The compound 1 was readily recognized as sesquiterpene aldehyde by its preliminary spectral data. Its proton spectrum showed the presence of an aldehyde group δ 9.38 (s) in the molecule. The proton spectrum further showed one secondary methyl at δ 0.79 (d, J = 7.0 Hz), two double-bonded methyls at δ 1.64 (s) and 1.79 (d, J = 1.3 Hz) and an olefinic proton at δ 6.73 as double quartet. Its carbon spectrum showed the presence of 15 signals. It showed an aldehydic carbonyl signal at δ 195.8 and a double-bonded methyl carbon at δ 9.2, which is connected to the a-carbon of the α,β-unsaturated system. Furthermore, the spectrum showed four signals at δ155.9, 137.4, 132.5, and 131.9 which correspond to two double bonds in the molecule. By comparing the spectral data of the compound 1 [Table 2] well corroborated with previously reported values as well as by co-TLC with an authentic sample and established as nardal. 
|Table 2: Comparison of 1H and 13C NMR spectral data of compounds 1 and 3 in CDCL3 (400 MHz for 1H and 100 MHz for 13C NMR) |
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The compound 2 was identified as sesquiterpene acid based on its preliminary spectral data. The proton spectrum showed the presence of carboxylic peak at δ 12.0 (1H, br) in the molecule. It also showed an isopropyl methyl group at δ 0.97 as broad singlet, one secondary methyl at δ 1.05 (d, J = 6.2 Hz), and two olefinic protons at 5.75 (d, J = 6.9 Hz) and 7.16 (d, J = 6.0 Hz). The olefinic protons are connected to β- and γ-protons of conjugated carboxylic acid system. Its carbon spectrum showed the presence of 15 signals, including one carboxylic acid signal at δ 175.0, four olefinic signals at δ 160.6, 135.3, 134.4, and 117.0. By revealing the literature, the spectral data [Table 3] of the compound 2 is exactly matching with those of previously reported values. So, the compound has been identified as jatamansic acid. 
|Table 3: 1H and 13C NMR spectral data of compound 2 in CDCL3 (400 MHz for 1H NMR and 100 MHz for 13C NMR) |
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The compound 3 was readily recognized as sesquiterpene acid by its preliminary spectral data. The proton spectrum showed one secondary methyl at δ 0.79 (d, J = 7.0 Hz), two double-bonded methyls at δ 1.64 (s) and 1.79 (d, J = 1.3 Hz), and an olefinic proton at δ 7.19 (d, J = 9.9 Hz). Its carbon spectrum showed the presence of 15 signals. It showed carboxylic acid signal at δ 173.9, a double-bonded methyl carbon at δ 13.5, and four olefinic carbons at δ 146.3, 133.3, 131.2, and 125.3. All the spectral data of the compound 3 [Table 2] were found to be identical to those reported for nardin.  The identification of the compound was further confirmed by direct comparison with reference sample through mixed melting point and co-TLC. The compound 3 is an oxidized form of nardal.
The results of hair growth promotion [Table 1] showed that crude hexane extract required less time than pure compounds, nardin and jatamansic acid. It is worth mentioning that many crude extracts or active fractions are showing better activity than individual compounds.
| Conclusion|| |
To our best knowledge, the present study is the first report of the isolation of active compounds from N. jatamansi for hair growth studies. Additionally, even though the plant has been worked out very well for the past 70 years, this is the first time all three compounds were reported in same isolation.
| Acknowldegements|| |
Authors are thankful to Mr. C. K. Ranganathan, CMD of CavinKare Pvt. Ltd., Chennai, for his interest, constant encouragement, and providing the necessary facilities and also thankful to Dr. M. S. L. Madhavi for conducting the animal experimentation.
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[Table 1], [Table 2], [Table 3]
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