Literature DB >> 27087820

An Analysis of the Combination Frequencies of Constituent Medicinal Herbs in Prescriptions for the Treatment of Stroke in Korean Medicine: Determination of a Group of Candidate Prescriptions for Universal Use.

Byeong Cheol Yun1, Seung Bin Pae1, Yoo Kyoung Han1, Moo Jin Choi1, Byung Tae Choi2, Hwa Kyoung Shin2, Jin Ung Baek1.   

Abstract

In contrast to Western medicine, which typically prescribes one medicine to treat a specific disease, traditional East Asian medicine uses any one of a large number of different prescriptions (mixtures of medicinal herbs), according to the patient's characteristics. Although this can be considered an advantage, the lack of a universal prescription for a specific disease is considered a drawback of traditional East Asian medicine. The establishment of universally applicable prescriptions for specific diseases is therefore required. As a basic first step in this process, this study aimed to select prescriptions used in the treatment of stroke and, through the analysis of medicinal herb combination frequencies, select a high-frequency medicinal herb combination group for further experimental and clinical research. As a result, we selected some candidates of a medicinal herb combination and 13 candidates of a medicinal herb for the treatment of stroke.

Entities:  

Year:  2016        PMID: 27087820      PMCID: PMC4818814          DOI: 10.1155/2016/2674014

Source DB:  PubMed          Journal:  Evid Based Complement Alternat Med        ISSN: 1741-427X            Impact factor:   2.629


1. Introduction

Historically, natural products utilized in traditional medicine have been invaluable for drug development [1, 2]. However, the development of traditional medicines into pharmaceutical products has been challenging; the first step involves the discovery of suitable traditional medicine prescriptions for universal application [3, 4]. While disease symptoms are generally considered similar among patients from the perspective of Western medicine, in traditional East Asian medicine, the selection and administration of one of several tens or hundreds of prescriptions (which are mixture of medicinal herbs) vary according to the individual. This accounts for the diverse variables associated with an individual's external (climate, food, occupation, etc.) and internal (body weight, gender, age, physical strength, etc.) environment. Consequently, while prescriptions which treat the same disease may be combined into a bundle, the nature of the prescriptions in the bundle will be slightly different; this may be considered both a strength and a weakness of traditional East Asian medicine. Combining prescriptions is advantageous because it accounts for variations in individual characteristics; however, it results in lack of universally applicable prescriptions to treat specific diseases. An attempt to address this involves selecting all of the medicinal herb combinations that exist within each prescription bundle and determining the frequency of these combinations. Despite the loss of individual customizability, selection of the highest frequency medicinal herb combinations may constitute a candidate group for the development of a new prescription for universal application. Therefore, in this study, after selecting all of the prescriptions for the treatment of stroke (PTSs) recorded in “Dongeuibogam (dong yi bao gian),” a principal piece of Korean medicine literature [5], the frequency of medicinal herb combinations comprising each PTS was analyzed. The aim was to determine a potential candidate group of medicinal herb combinations that can be administered universally for the treatment of stroke. The rationale for selecting multiple medicinal herb prescriptions, as opposed to single medicinal herbs, is as follows: (1) traditional East Asian medicines are typically available in the form of prescriptions [6]; (2) prescriptions can enhance the effect of the individual constituent medicines and minimize toxicity [7]; and (3) prescriptions are not simply a quantitative addition of the individual medicinal herbs; instead they produce a superior efficacy to single medicines [8, 9]. While several previous studies have analyzed the frequency of medicinal herb combinations for various investigatory purposes [10-12], this present study is the first to use this method in order to develop a universally applicable prescription for the treatment of stroke.

2. Materials and Methods

This study comprised three steps. Each step was performed as described in the following paragraphs.

2.1. First Step (Figure 1): Establishing a List of PTSs and Constituents of Each Item from the “Pung Chapter” in “Dongeuibogam”

In the first step, after selecting all of the prescriptions recorded in the “Pung chapter” (specialized chapter about stroke) in “Dongeuibogam,” their indications were analyzed and the medicinal herbs constituting each of the PTSs were selected.

2.2. Second Step (Figure 2): Selection of Medicinal Herb Combinations from 92 PTSs in the Order of Frequency

In the second step, the combinations with the highest repeat frequencies were selected as candidates of a medicinal herb combination for the treatment of stroke (CMHCTS), and all medicinal herbs which comprise these combinations were selected as candidates of a medicinal herb for the treatment of stroke (CMHTS). Only the medicinal herbs with doses in the upper 80% cumulative proportion per prescription were included in the CMHCTS. This ensured that only main therapeutic medicinal herbs were selected. This methodology assumed that the higher the dose within a prescription, the stronger the effect and that the more frequently a medicinal herb is included in prescriptions to treat symptoms, the more important it is [13].

2.3. Third Step (Figure 3): Preliminary Evaluation of the Effects of CMHTSs via Analysis of Previous Studies

2.3.1. Selection and Analysis of Previous Studies regarding Effects in Stroke

We searched for 13 CMHTSs in the previous studies and identified relevant studies. Next, studies were specifically divided into in vitro studies, in vivo studies, clinical studies, and reviews and then analyzed again for research performance status.

2.3.2. Searching the Database

In addition to commonly used scientific databases (such as PubMed, Cochrane, and Scopus), Korean databases (Ndsl, Oasis, and Riss) were used since we were searching specifically for studies related to Korean medicine (KM). The starting period for these study searches was not defined; however, December 31, 2014, was set as the final time point.

2.3.3. Searching Keywords

We used the following terms for the searches: “Scientific names of CMHTS (and Names of herbal medicine of CMHTS) + stroke, cerebral ischemia, ischemia-reperfusion, middle cerebral artery occlusion, hypoxia, oxygen-glucose deprivation, neuroprotection, cerebrovascular protection, anti-neuroinflammation, blood-brain barrier”.

3. Results and Discussion

3.1. PTSs from the “Pung Chapter” in “Dongeuibogam”

In total, 92 PTSs were selected from the “Pung chapter” in “Dongeuibogam” and each PTS comprised an average of 7.9 medicinal herbs. Chinese names followed by the number of constituents are as follows: Ba bao hui chun tang (26). Ba wei shun qi san (8). Ba wu tang jia nan xing ban xia zhi shi zhu li sheng jiang zhi (13). Bu huan jin dan (13). Chuan xiong shi gao san (8). Da qin jiao tang (16). Da sheng feng tang (9). Dao tan tang (7). Di huang yin zi (15). Di tan tang (10). Ding feng bing zi (9). Du shen tang jia zhu li jiang zhi (3). Er chen tang (5). Er shen dan (10). Fang feng tong sheng san (18). Huan gu dan (16). Huo ming jin dan (15). Huo xiang zheng qi san jia nan xing mu xiang fang feng dang gui (17). Jia jian dao tan tang (17). Jia jian pai feng tang (17). Jia jian run zao tang (23). Jia jian xu ming tang (13). Jia wei da bu tang (23). Jia wei jing zhou bai yuan zi (8). Jie yu wan (8). Jing zhou bai yuan zi (4). Li qi qu feng san (17). Long xing dan (12). Mi chuan shun qi san (18). Mu xiang bao ming dan (26). Niu huang ding zhi wan (14). Niu huang qing xin yuan (30). Pai feng tang (14). Pi xun ding zi (19). Pi yue wan (6). Qian zheng san (3). Qiang huo yu feng tang (28). Qin jiao sheng ma tang (10). Qing qi xuan feng san (21). Qing shen jie yu tang (19). Qing tan shun qi tang (14). Qing xin san (9). Qing yang tang (10). Qu feng chu shi tang (19). Qu feng dan (1). Qu feng zhi bao dan (26). Quan sheng hu gu san (8). Ren shen qiang huo san (16). Ren shen shun qi san (14). San he tang (11). San sheng yin (5). Shen li tang (16). Shen xiang ban xia tang (6). Shi quan da bu tang (12). Shu feng shun qi tang (22). Shu feng shun qi yuan (12). Shu feng tang (14). Shu jin bao an san (15). Si bai dan (20). Si jun zi tang jia er chen tang zhu li sheng jiang zhi bai jie zi (12). Si jun zi tang jia zhu li sheng jiang zhi (6). Si jun zi tang (4). Si wu tang jia zhu li sheng jiang zhi fu zi wu tou (8). Si wu tang jia zhu li sheng jiang zhi tao ren hong hua bai jie zi (9). Si wu tang jia zhu li sheng jiang zhi (6). Si wu tang (4). Su he xiang yuan (15). Su jing yuan (19). Tian tai san (19). Tian xian gao (4). Tie tan yuan (5). Tong qi qu feng tang (12). Tou bing dan (12). Wan jin tang (14). Wu long dan (4). Wu yao shun qi san (12). Xi jiao sheng ma tang (9). Xiao tong sheng san (12). Xiao xu ming tang (13). Xie she bai yuan zi (8). Xing fu san (9). Xu ming zhu san (15). Yang rong tang (20). Yi li jin dan (11). Yu feng dan (13). Yue bi tang (6). Yun qi san (10). Zheng she san (3). Zhi bao dan (11). Zhuan she gao (11). Zi run tang (10). Zi shou jie yu tang (10).

3.2. Selection of Medicinal Herb Combinations from 92 PTSs by Frequency Order: Including Only the Medicinal Herbs in the Top 80% Cumulative Percentage for Each Prescription

The following medicinal herb combinations were selected: 82 combinations of one medicinal herb, 581 combinations of two medicinal herbs, 2078 combinations of three medicinal herbs, 5691 combinations of four medicinal herbs, 12,522 combinations of five medicinal herbs, 22,086 combinations of six medicinal herbs, and 31,335 combinations of seven medicinal herbs. By focusing on the top five of each of these (plus ties), selection of the following occurred: six combinations comprising one medicinal herb, five combinations of two medicinal herbs, 13 combinations of three medicinal herbs, seven combinations of four medicinal herbs, six combinations of five medicinal herbs, 19 combinations of six medicinal herbs, and three combinations of seven medicinal herbs. These comprised the CMHCTS with the highest probability of efficacy in the treatment of stroke (Table 1).
Table 1

Medicinal herb combinations from 92 PTSs in the order of frequency (80%).

Number of constituentsName of constituentsFrequency
1(1) Pinellia ternata (Thunb.) Breit., rhizome15
(2) Atractylodes japonica Koidzumi, rhizome15
(3) Arisaema amurense Maximowicz, rhizome14
(4) Glycyrrhiza uralensis Fisch., root12
(5) Paeonia lactiflora Pallas, root10
(6) Poria cocos Wolf, sclerotium10

2(1) Pinellia ternata (Thunb.) Breit., rhizome/Arisaema amurense Maximowicz, rhizome9
(2) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root8
(3) Atractylodes japonica Koidzumi, rhizome/Poria cocos Wolf, sclerotium 8
(4) Atractylodes japonica Koidzumi, rhizome/Angelica gigas Nakai, root7
(5) Atractylodes japonica Koidzumi, rhizome/Pinellia ternata (Thunb.) Breit., rhizome7

3(1) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root7
(2) Atractylodes japonica Koidzumi, rhizome/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome7
(3) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium6
(4) Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root5
(5) Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Angelica gigas Nakai, root5
(6) Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root 5
(7) Atractylodes japonica Koidzumi, rhizome/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root5
(8) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium5
(9) Atractylodes japonica Koidzumi, rhizome/Rehmannia glutinosa Liboschitz, root/Angelica gigas Nakai, root5
(10) Atractylodes japonica Koidzumi, rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root5
(11) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root5
(12) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root5
(13) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Angelica gigas Nakai, root5

4(1) Atractylodes japonica Koidzumi, rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root5
(2) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Angelica gigas Nakai, root5
(3) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome5
(4) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root5
(5) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root5
(6) Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root5
(7) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root5

5(1) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root5
(2) Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root4
(3) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root 4
(4) Atractylodes japonica Koidzumi, rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root4
(5) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root4
(6) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium4

6(1) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root4
(2) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(3) Atractylodes japonica Koidzumi, rhizome/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root/Ostericum koreanum (Max.) Kitagawa, rhizome3
(4) Atractylodes japonica Koidzumi, rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(5) Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(6) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(7) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(8) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome3
(9) Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(10) Scutellaria baicalensis Georgi, root/Gastrodia elata Bl., rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root3
(11) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Gastrodia elata Bl., rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root3
(12) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(13) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Paeonia lactiflora Pallas, root/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3
(14) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Angelica gigas Nakai, root3
(15) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome3
(16) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root3
(17) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Gastrodia elata Bl., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root3
(18) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Gastrodia elata Bl., rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Angelica gigas Nakai, root3
(19) Atractylodes japonica Koidzumi, rhizome/Gastrodia elata Bl., rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root3

7(1) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Gastrodia elata Bl., rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Angelica gigas Nakai, root3
(2) Scutellaria baicalensis Georgi, root/Atractylodes japonica Koidzumi, rhizome/Fraxinus rhynchophylla Hance, cortex/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root 3
(3) Atractylodes japonica Koidzumi, rhizome/Ligusticum chuanxiong Hort., rhizome/Rehmannia glutinosa Liboschitz, root/Paeonia lactiflora Pallas, root/Poria cocos Wolf, sclerotium/Pinellia ternata (Thunb.) Breit., rhizome/Angelica gigas Nakai, root3

Selecting CMHCTSs as the top 5 on the basis of frequency, only including frequencies greater than 3 and including ties for the 5th place.

3.3. Preliminary Evaluation of the Effects of 13 CMHTSs via Analysis of Previous Studies

A total of 1,494 studies of 13 CMHTSs were found; of these, 103 studies were concerned with effects in stroke, resulting in an average of 7.9 publications per candidate herb (Table 2).
Table 2

Preliminary evaluation of the effects of 13 CMHTSs in stroke via analysis of the previous studies.

Name of CMHTSClassification of the study (number)Source database/main outcome
Angelica gigas Nakai, rootVT (2)(1) P/attenuated Aβ(1-42)-induced neurotoxicity and tau hyperphosphorylation at multiple AD-related sites in a dose-dependent manner [16]
(2) N and R/inhibited Glu-induced neurotoxicity with IC50 [17]
VV (24) (1) S/improved the outcome in rats after cerebral ischemia and reperfusion in terms of neurobehavioral function [18]
(2) P/improved the habituation memory, decreased AChE, corticosterone, and TNF-α, and increased antioxidants [19]
(3) S/infarct volume of Angelica group was significantly decreased [20]
(4) N/the expression of Ang-2 in the APS group was higher than that in the control group [21]
(5) P, S, and N/the hyperintense signals and volume in the right cerebrum in Angelica-treated group decreased [22]
(6) N/the expression of VEGF in the Angelica sinensis group was higher than that in the other groups [23]
(7) P and N/increased the gene expression of Flt-1 and Flk-1 [24]
(8) P, S, and N/reduced cerebral infarct and neurological deficit score and suppressed superoxide radicals in the parenchyma lesion [25]
(9) P and R/prevented the decrease in the levels of phospho-Akt and phospho-GSK-3β [26]
(10) P, S, and N/prevented neuronal loss, dendrites damage, and neuronal apoptosis in both parietal cortex and hippocampus of 2VO rats [27]
(11) S and N/reduced brain swelling by 68.62% and 82.08% and significantly improved behavioral deficits [28]
(12) N/inhibited cyclooxygenase-2 [29]
(13) P, S, and N/decreased the level of malondialdehyde (MDA) and increased the activities of the antioxidant enzyme glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) in the ischemic brain tissues [30]
(14) P and S/reduced malondialdehyde levels and increased superoxide dismutase activity in ischemic brain tissue [31]
(15) S/decreased the neurologic deficit score and the cerebral infarct volume rate [32]
(16) P and S/reduced mortality, neurobehavioral deficits, brain edema, BBB permeability, and cerebral vasospasm [33]
(17) P, S, and N/activated Nrf2/HO-1 pathway [34]
(18) N and O/GFAP, CD81, and ERK of the brain in rats with cerebral infarction after MCAO were meaningfully decreased [35]
(19) O and R/induced in infarction areas and volume [36]
(20) N and O/elevated MCAO-induced decrease in density of neurons and c-Fos immunoreactive cells [37]
(21) R/had neuroprotective effects via attenuation of COX-2 induction in hippocampus [38]
(22) N, O, and R/inhibited decreasing the cell viability in ischemia-induced cells [39]
(23) N, O, and R/reduced infarction volume in ischemic brains of rats, degradation of neuronal cell, BBB permeability, and expression of VEGF protein dose-dependently [40]
(24) N and R/decreased infarction volume in ischemic brains and inhibited the expression of iNOS, Bax, and caspase-3 [41]
C (1)(1) P/decreased infarcted volume [42]
R (1)(1) P/increased blood circulation and neuronal metabolism in an MCAO rat model [43]

Ostericum koreanum (Max.) Kitagawa, rhizomeVV (1)(1) O/change of brain bloodstream by preadministered Ds and Dn in cerebral ischemia and blood gas induction by MCAO did not appear [44]

Arisaema amurense Maximowicz, rhizome Not available

Atractylodes japonica Koidzumi, rhizomeVT (1)(1) R/inhibited the hypoxia signaling pathway by reducing HIF-1a expression [45]
VV (1)(1) P/prevented growth inhibition, mitochondrial injury, and apoptosis of neurons induced by hypoxia [46]

Fraxinus rhynchophylla Hance, cortexNot available

Gastrodia elata Bl., rhizomeVT (2)(1) S/prevented PC12 cell apoptosis in concentration-dependent manners [47]
(2) P, S, and N/increased cAMP formation, PKA activity, and phosphorylation of the CREB protein [48]
VV (13)(1) P and S/decreased the infarct volume and edema volume and improved the neurological functions after MCAO [49]
(2) R/reduced infarction area in TTC stain and decreased necrosis in H&E stain [50]
(3) R/showed lower modified neurological severity score (mNSS) [51]
(4) P and S/attenuated the hippocampal neuronal damage in the CA1 region in high dose [52]
(5) P and S/increased the levels of PDI (protein disulfide isomerase) and 1-Cys Prx (peroxiredoxin) transcription [53]
(6) P, S, and N/increased the expression of Bcl-2 and inhibited the activation of caspase-3 ultimately inhibiting apoptosis [54]
(7) P and S/expression of PDI, Nrf2, BDNF, GDNF, and MBP genes increased [55]
(8) N and R/improved the neurological symptoms, reduced infarct volume and cerebral edema, and regulated the expression of CaMKII [56]
(9) R/decreased infarct size in the brain of GEBs or 4-HBA group [57]
(10) P and S/prevented hippocampal CA1 cell death following global ischemia [58]
(11) O and R/had protective effects in the intraperitoneal injection of 1200 mg/kg and 600 mg/kg of Gastrodiae Rhizoma extracts [59]
(12) O and R/reduced infarct size partly and volume significantly in the MCAO rat brain [60]
(13) R/showed a significant decrease in infarct size in the ipsilateral brain with the extracts [61]
R (3)(1) S/had the greatest neuronal survival after ischemia insult with vanillin-treated animals [62]
(2) S/protected against neuronal cell damage after transient global ischemia in gerbils [63]
(3) S/had correlation with stroke by statistics and association analysis [64]

Glycyrrhiza uralensis Fisch., rootVV (5)(1) P, S, and N/had robust neuroprotection in the postischemic brain via anti-inflammatory effect by inhibiting HMGB1 phosphorylation and secretion [65]
(2) P, S, and N/decreased the focal infarct volume, cerebral histological damage, and apoptosis in MCAO rats [66]
(3) P, S, and N/the neurological deficits, infarct volume, and the levels of MDA and carbonyl decreased [67]
(4) P/reduced LDH release from PC12 cells exposed to hypoxic chamber [68]
(5) P, S, and N/inhibited the increases of brain MDA content and prevented the activities of brain superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) from decline caused by cerebral ischemia-reperfusion [69]

Ligusticum chuanxiong Hort., rhizomeVT (6) (1) N/the levels of tumor necrosis factor-α (TNF-α), endothelin (ET), and intercellular adhesion molecule-1 (ICAM-1) were lower significantly in the groups treated with volatile oil [70]
(2) P, S, and N/reduced cerebral infarct and neurological deficit score [25]
(3) P and R/prevented the decrease in the levels of phospho-Akt and phospho-GSK-3β proteins [26]
(4) P, S, N, and R/decreased the infarct size and behavior deficits score [71]
(5) N/scores of neurological deficit and infarct volume were lower significantly in the groups treated with volatile oil, and the nitric oxide (NO) and malondialdehyde (MDA) levels were found to be decreased [72]
(6) O and R/reduced the infarction areas and volume [73]
C (3)(1) N/results are healing in 19 cases, obvious effect in 13 cases, availability in 5 cases, and invalidation in 3 cases; healing and obvious effect rate: 80.0% [74](2) P/the effect of L. chuanxiong on the treatment of acute cerebral infarction was superior to low molecular weight dextran [75](3) P, C, S, and N/improved brain microcirculation through inhibiting thrombus formation and platelet aggregation as well as blood viscosity [76]

Paeonia lactiflora Pallas, rootVV (14) (1) P/ischemia-reperfusion significantly increased AUC values, decreased CL values, and prolonged the terminal half-life of paeoniflorin [77]
(2) P/prevented reduction of Na(+)-K(+)-ATPase activity, increased NO level, and enhanced NOS activity [78]
(3) P and S/reduced the infarct volume and alleviated related tongue protrusion (TP) [79]
(4) S, N, and R/the injuries of ischemia-reperfusion could play an important role in pharmacokinetic process of paeoniflorin in the cortex after intravenous administration of Paeoniae Radix extract [80]
(5) P/displaced the binding of [3H]NECA to the membrane preparation of rat cerebral cortex in a manner different from its classical agonists [81]
(6) P and S/reduced protein levels of Ras, MEK, p-MEK, and p-ERK [82]
(7) P and S/produced delayed protection in the ischemia-injured rats via inhibiting MAPKs/NF-κB mediated peripheral and cerebral inflammatory response [83]
(8) P/increased cell survival rate and reduced the binding activity of NMDA receptors [84]
(9) P/inhibited β-secretase and apoptosis [85]
(10) P and S/reduced the cerebral infarction area and the neurodeficit score and reduced lucigenin-CL counts at 2 h period of reperfusion [86]
(11) P/reduced the decrease of superoxide dismutase (SOD), inhibited the increase of nitric oxide (NO), and lessened the level of malondialdehyde (MDA) and reduced the decrease of lactate dehydrogenase (LDH) in cerebrum remarkably [87]
(12) P/relieved brain edema, enhanced SOD activity, and lowered MDA concentration in the gerbils and had milder injury of the cells in the hippocampal CA1 region [88]
(13) P/prolonged gasp time of decapitative mice, lessened cerebral water content, and decreased permeability of cerebral capillary [89]
(14) P, S, and N/reduced the counts of ED1, IL-1beta, TNF-alpha, and ICAM-1 of microvessels and MPO immunoreactive cells and apoptotic cells [90]
R (1)(1) S/showed less potent caspase inhibitory activity [91]

Pinellia ternata (Thunb.) Breit., rhizomeNot available

Poria cocos Wolf, sclerotiumVV (1)(1) N/showed neuroprotective effects with EC50 values of 21.6 μg/mL [92]

Rehmannia glutinosa Liboschitz, rootVT (1)(1) P, S, and N/increased astrocyte survival significantly in a concentration-dependent manner [93]
VV (3)(1) P and S/enhanced angiogenesis around the infarct of cortex and neurogenesis in the hippocampal dentate gyrus (DG) [94]
(2) P, S, and N/rescued neurons in hippocampal CA1 subfield and reduced working errors during behavioral testing [95]
(3) S and N/upregulated GAP-43 protein expression [96]

Scutellaria baicalensis Georgi, rootVT (1)(1) P, S, and N/did not block NMDA-induced neuronal death [97]
VV (20) (1) P, S, and N/activated GABAergic signaling and HSP70 and MAPKs cascades in global ischemia [98]
(2) P, S, and N/performed well in regulating proteins in energy metabolism but had a relatively weak effect in the regulation of proteins in neurogenesis and apoptosis [99]
(3) P, S, and N/the level of NF-κB p65 was decreased by 73% after baicalin treatment [100]
(4) P, S, and N/suppressed caspase-3 in ischemic gerbils hippocampus [101]
(5) P, S, and N/inhibited the formation of 3-nitrotyrosine, reduced infarct size, and attenuated apoptotic cell death, whose effects were similar to FeTMPyP [102]
(6) P, S, N, and R/inhibited microglial tumor necrosis factor-alpha (TNF-alpha) and nitric oxide production [103]
(7) P, S, N, and R/the increased contents of MDA and NO and SOD activity and the decreased activity of CAT in the hippocampus and cerebral cortex induced by cerebral ischemia were differently reversed [104]
(8) P, S, and N/the activities of lactate dehydrogenase, Na(+)-K(+)-ATPase, Ca(2+)-ATPase, and superoxide dismutase were significantly lowered [105]
(9) P/increased cell survival and inhibited cell apoptosis and excessive production of malondialdehyde [106]
(10) R/decreased the release of neuron-specific enolase and the production of TBARS [107]
(11) N/reduced the volume of infarction in the cerebral cortex as well as in the striatum [108]
(12) P, S, N, and R/reduced the infarct volume, prevented apoptosis in hippocampal cells, attenuated neuronal and blood-brain barrier damage, and upregulated Bcl-2 protein expression [109]
(13) P and S/reduced brain water content and the permeability of blood vessels, ameliorated ischemia-induced morphology changes in hippocampal microvessels, and downregulated Fas and FasL protein expression [110]
(14) P, S, N, and R/prolonged gasping time (prolonged ratio: 23.79%) and survival time after carotid artery occlusion and decreased malondialdehyde (MDA) content in damaged brain tissues [111]
(15) P and S/inhibited PKC(alpha) translocation [112]
(16) N/protected CA1 hippocampal neurons against 20 min transient forebrain ischemia [113]
(17) P, S, and N/attenuated neuronal injury and improved abnormality of energy metabolites in rats induced by global ischemia [114]
(18) P and S/inhibited MMP-9 activity in the hippocampus [115]
(19) O/CAT and GSH were activated by Scutellaria Radix extract administration [116]
(20) P, S, and N/reduced the pMCAO- (permanent occlusion of middle cerebral artery-) induced infarct areas in the cerebral cortex as well as in the striatum [117]
R (2)(1) S/exerted neuroprotection by inhibiting TNF-α [62]
(2) P/Had antiapoptotic and antiglutamate activity which are the key processes for neuroprotection [118]

PubMed (P), Cochrane (C), Scopus (S), Ndsl (N), Oasis (O), and Riss (R)

In vitro study (VT), in vivo study (VV), clinical study (C), and review (R).

3.4. Discussion

In this paper, medicinal herbs which have high possibility of stroke treatment effect in KM were selected from “Dongeuibogam” by analyzing frequency and effectiveness. Then, analysis of the previous studies has been done. Look at the possible mechanisms of 13 CMHTSs in Table 2 which shows the final results: (1) Angelica gigas Nakai, root: vanillic acid (VA) obtained naturally from the plant Angelica sinensis improves spatial learning and memory retention by preventing oxidative stress; (2) Ostericum koreanum (Max.) Kitagawa, rhizome: Ostericum koreanum has vasodilation effect via change of brain bloodstream; (3) Arisaema amurense Maximowicz, rhizome X: none; (4) Atractylodes japonica Koidzumi, rhizome: Atractylodes japonica Koidzumi prevent the growth inhibition, mitochondrial injury, and apoptosis of neurons induced by hypoxia; (5) Fraxinus rhynchophylla Hance, cortex X: none; (6) Gastrodia elata Bl., rhizome: Gastrodia elata attenuate the hippocampal neuronal damage and decrease necrosis; (7) Glycyrrhiza uralensis Fisch., root: Glycyrrhiza uralensis Fisch. has neuroprotective efficacy in the postischemic brain via its anti-inflammatory, antiexcitotoxic, and antioxidative effects; (8) Ligusticum chuanxiong Hort., rhizome: Ligusticum chuanxiong Hort. reduces cerebral infarct through its antioxidative and anti-inflammatory effects; (9) Paeonia lactiflora Pallas, root: paeoniflorin may play the role of antagonising cerebral ischemia by adjusting cerebral energy metabolism and nitric oxide formation; (10) Pinellia ternata (Thunb.) Breit., rhizome X: none; (11) Poria cocos Wolf, sclerotium: Poria cocos have neuroprotective effects against the acute restriction of metabolite and oxygen supply in cerebral blood flow; (12) Rehmannia glutinosa Liboschitz, root: Catalpol, an iridoid glycoside abundant in the roots of Rehmannia glutinosa, exerts the cytoprotective effect on astrocytes by suppressing the production of free radicals and elevating antioxidant capacity; (13) Scutellaria baicalensis Georgi, root: Scutellaria baicalensis Georgi dramatically reduce the decrease in learning and memory, attenuated neuronal injury, and improved abnormality of energy metabolites. To sum up, stoke treatment by antioxidative effect and anti-inflammatory effect was mostly common. There were many research papers about neuroprotective effect by energy metabolism and controlling blood circulation as well. In addition, there are only 4 clinical studies (1 for Angelica gigas and 3 for Ligusticum chuanxiong) among 103 previous studies. Simply look at the result: (1) Angelica gigas Nakai, root: Angelica injection has evident therapeutic effect in treating acute cerebral infarction.; (2) Ligusticum chuanxiong Hort., rhizome: Ligusticum chuanxiong and its effective components improve brain microcirculation through inhibiting thrombus formation and platelet aggregation as well as blood viscosity. However, in spite of the explanations so far, there could be a few fundamental questions regarding methodology and result of this study since the research method we are using is not general. First of all, you might ask why classical literature has been used as data instead of clinical data of our times for selecting candidates of medicinal herbs in the first step of method. The answer is that although it is necessary to collect and analyze prescriptions that are frequently used in clinic now for stroke treatment, it is also necessary to discover “a hidden treasure” which was used in the past and might be buried now in classical literature. Second of all, you might ask why Korean traditional medicinal book was only chosen among many traditional medicinal books. The reason is that Korean traditional medicine has a long tradition but is less studied by researchers compared to Chinese traditional medicine. Thus, we tried to study and discover valuable data from unexplored field. There are three main reasons for selecting “Dongeuibogam” among Korean traditional medicinal books: (1) “Dongeuibogam” is the comprehensive summary of all the traditional medicines of Northeast Asia prior to the 17th century, because it is based on rigorous selection of 189 of the major medicinal literature sources of the region [14]; (2) it had a significant impact on not only KM after the 17th century but also on medicinal practices in China and Japan [15]; (3) except for minor content related to superstitions, which were contemporary standards at the time of publication, most of its content is still widely used in modern KM by Korean medical doctors. Third of all, you may wonder if it is possible to match today's stroke and stroke written in the classical literature. Even though definition of stroke in Korean traditional and Western medicine is slightly different, “Pung chapter” specializes in symptom which is the most similar to symptom of today's stroke. Therefore, it is appropriate to match today's stroke and stroke written in the classical literature to select CMHTSs. Fourth of all, you may wonder why 80% of medicinal herbs in PTS are only included in CMHCTS in the second step of method. In Korean traditional prescription, such as Zingiber officinale Rosc. and Zizyphus jujuba var. inermis Rehder, the so-called “shǐ yào” are added a little for balance of medicinal herbs or to improve digestive functions. These “shǐ yào” do not have major treatment effect but are frequently added in prescriptions, which means that frequently used medicinal herbs in prescription do not mean the herbs are principle ingredients. And therefore, the minor herbs were excluded from CMHCTS and only 80% of medicinal herbs in PTS were included in CMHCTS. The other doubt in the second step of method is that, instead of selecting the most frequently used medicinal herbs in 94 PTSs as CMHTS, why CMHTS is selected after sorting CMHCTS out. The reason is that prescriptions are not simply a quantitative addition of the individual medicinal herbs; instead they produce a superior efficacy to single medicines [8, 9]. Therefore, proposing medicinal herbs of possible combinations instead of single medicines to a clinical researcher could be more useful for follow-up experiment. Lastly, you may wonder about necessity of third step of method and result of the step, Table 2. In terms of the main purpose of this study (discovering from classical literature), you may find that this step is unnecessary. However, proposing candidates of medicinal herb to clinical researchers by discovering from the classical literature is also the final purpose of this study. Thus, by summarizing previous studies for clinical researchers, it is expected to motivate researchers to conduct follow-up experiments and help to establish research direction using candidates of medicinal herb selected from this research. For the reason above, the third step of the method was carried out and the result of the step is in Table 2. The fundamental questions discussed above are not only key point but also character of this paper. In conclusion, methodology used in this study is regarded as meaningful challenge to discover “a hidden treasure” for stroke from classical literature. And the result of this study, some CMHCTSs and 13 CMHTSs, will be certainly valuable as fundamental data for experiment and clinical research.

4. Conclusions

In the present study, we finally selected some CMHCTSs and 13 CMHTSs from the “Dongeuibogam” and reviewed the results of previous studies regarding the effects in stroke. In order to develop a universally applicable PTS, it will be necessary to conduct longer and more complex experiments and clinical trials. However, the CMHCTSs and CMHTSs proposed in this study have the potential to reduce the experimental and developmental time period. Furthermore, this study demonstrates the utilization of text mining for the development of universally applicable prescriptions for a particular disease.
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