World Academy of Science, Engineering and Technology
International Journal of Medical Science and Engineering Vol:7 No:11, 2013
(Amorphophallus muelleri Blume) in Treatment of
Loperamide Induced Constipation on Sprague Dawley
Simon Bambang Widjanarko, Novita Wijayanti, Aji Sutrisno
Laxatives drugs are agents that add bulk to intestinal
Abstract—There is long history of konjac tubers being used as a
contents, that retain water within the bowel lumen by virtue of
cure for certain diseases in China and Japan. Konjac flour is prepared
osmotic effects, or that stimulate intestinal secretion or
from konjac tubers and it contains high concentration of motility, thereby increasing the frequency and ease of
glucomannan. Konjac Glucomannan (KGM) is dietary fiber and the
defecation [5]. There are four main types of laxative drug:
role of which has been demonstrated in weight reduction, lowering
bulking agents, stool softeners, stimulant laxatives and
blood cholesterol and sugar level, promoting intestinal activity etc. Konjac glucomanan has a property of swelling by absorbing water,
osmotic ally active compounds [6]. The use of laxative drug is
more than a hundred times its own weight. Therefore it helps
very common for constipation treatment especially for older
increasing weight of feces, water content of feces, and promotes
people. But, repeated use of laxative drugs has side effects.
satiety feeling. Mode of actions of dietary fibre as laxatives agents
Senna (anthraquinones) can cause allergic reactions, fluid and
includes holding water inside the bowel lumen, inhibition of water
electrolyte depletion, and Melanesia coli. The side effect of
absorption in the colon and stimulating colonic motility. Number of
bulking agents was bloating and flatulence depends on their
fecal pellets did not effected in rats were fed on 300 and 600 mg/kg of konjac flour, as well as constipated control and Dulcolax doses. Diphenylmethane derivatives (bisacodyl) may cause treatment. Water content, weight of fecal pellets and gastrointestinal
cramping and electrolyte depletion when large doses are used.
transit ratio were higher in rats treated with 600 mg/kg than 300
Diarrhea is a side effect of colchicine drug [5].
mg/kg of konjac flour. Rats were administered with Dulcolax showed
Side effects of the laxative drug encourage the research to
the highest gastrointestinal transit ratio, followed by 600 mg/kg
find safer compound without side effects and derived from
konjac flour. The lowest feed consumption was noted in 600 mg/kg
plants. Several researches reported that many plant could use
as laxative agents, such as: apple fruit [7], figs fruit [8], kiwi
Keywords—Laxative, konjac flour, Amorphophallus muelleri fruit [9], [10], papaya fruit [11], watermelon fruit [12],
flaxseed [13], Aloe ferox Mill leaves [14], Aloe vera leaves
[15], tamarind leaves [16], agarwood leaves [17], [18],
euphorbiaceae leaf [19] and konjac tubers [20].
ONSTIPATION is a common problem in public health
Konjac glucomannan (KGM) is a dietary fiber that derived
C related with infrequency, difficulty or discomfort of from Amorphophallus konjac. It has been shown to relieve
defecation process and sense of incomplete evacuation, which
constipation, which could be associated with increased stool
marked with feces remain in the colon for prolonged periods
bulk and improved colonic ecology [21]. Several researches
of time, leading to water absorption, hardening of stool and
also reported that konjac flour that contains glucomannan can
excessive straining [1]. An epidemiologic study of used as laxative agent for children, pregnant women, and constipation in the United State identified it as an inability to
healthy man. Reference [22] found that glucomannan to be
evacuate feces completely and spontaneously three or more
beneficial in the treatment of constipation in children with no
times per week [2]. Several conditions such as deficiency of
significant side effects such as: abdominal pain, bloating,
dietary fiber, fluid, exercise, metabolic problem, increase use
abdominal distention, excessive gas, diarrhea, or anaphylactic
of medication and age can cause constipation. Constipation
symptoms. Reference [23] reported that consumption of 1.45
generally first appears between the ages of two and four years
grams per day of glucomannan in constipated pregnant women
children. Up to one third of children ages 6 to 12 years report
for 1-3 months induced a return to normal frequency of
constipation [3]. Constipation is also common in older people
weekly number of evacuations (4.9-5.8 times/weeks).
and the number of persons reporting constipation increases
Moreover, supplementation of konjac glucomannan (4.5 gram
per day) into low-fiber diets increased bowel movement frequency by 30% and improved the colonic ecology in
Simon Bambang Widjanarko, Novita Wijayanti, and Aji Sutrisno are with
Konjac flour which has been reported as a laxative agent
the Department of Agricultural Product Technology, Faculty of Agricultural
was konjac glucomannan that originated from Japan
Technology, University of Brawijaya, Jalan Veteran, Malang 64145(Contact
(Amorphophallus konjac). In fact, there are another species of
World Academy of Science, Engineering and Technology
International Journal of Medical Science and Engineering Vol:7 No:11, 2013
konjac (Amorphophallus muelleri Blume) that have a high
F. Total Number, Dry Weight and Water Content of the
potential and prospects for development in Indonesia [25].
Therefore, this research will be conducted to determine the
The excreted fecal pellets of individual rats were collected
effect of konjac flour from Indonesia as laxative drug. everyday at 15:00 throughout the duration of the experiment. Therefore this paper is, to report the laxative effect of konjac
Total number, weight and water content of the fecal pellets
flour on loperamide-induced constipation rats. The konjac were determined and data taken from the average value of five flour from Amorphophallus muelleri Blume was extracted by
days assessment. The water content was calculated as the
using multi-stage maceration method with ethanol solvent at
difference between the wet and dry weight on the pellet.
G. Gastrointestinal Transit Ratio
Gastrointestinal transit ratio was measured according to the
method in [16]. Before measurement of GIT ratio, rats were
fasted for 18 hours but they allowed free access of water.
The tubers of konjac (Amorphophallus muelleri Blume) Then, the rats were fed a standard diet. After 45 minutes, 1ml
were thoroughly washed with water, cut into thin slices and
of norit (3 gram suspended in 25ml of water) was orally
dried in the oven at 40oC for 24 hours. The dried chips were
administered to the rats as a marker. 20 minutes after
grinded into powder with stamp mill for 16 hours, 30 minutes,
administering the marker, the animals were anesthetized and
24 second at frequency 18.47. Then, konjac flour was sieved
sacrificed. The abdomen immediately cut open to excise the
at 30 meshes and blower by using air classifier. 25 gram of
whole small intestine. The small intestine from the pylorus to
materials was purified by multi stage maceration method with
the caecum was quickly removed and the distance traveled by
233.77 ml ethanol 40%, 60% and 80% respectively, at 434.22
the norit and the total length of the intestine were measured.
rpm for 4 hours, 16 minutes. Then, it was filtered by a filter
The GIT ratio was expressed as the percentage of the distance
paper and the precipitate was dried in an oven at 40oC for 24
travelled by the norit relative to the total length of the small
Male albino rats (Rattus norvegicus) of Sprague Dawley
Data are presented as mean ± standard deviation of three
strain with a mean weight 175-250 gram. The animals were
replicates and were subjected to one way analysis of variance
housed individually in plastic cage placed in a well ventilated
(ANOVA) followed by Tukey’s Honestly Significant
house with optimum condition. They were acclimatized to the
Difference (HSD) test to determine significant differences in
animal house condition for 7 days during which they were
all parameters. Values were considered statistically significant
allowed free access to standard diet (AIN-93M) and tap water
All experiment procedures were approved by the Ethical
Clearance Committee, University of Brawijaya, Malang,
To evaluate the laxative effect of konjac flour from
Amorphophallus muelleri Blume, groups of rats were induction with loperamide 3mg/kg body weight for three days,
D. Induction and Evaluation of Constipation
except one group for normal control. After induction time, all
Constipation was induced in the animals by the oral the groups of rats were fed with diet containing konjac flour
administration of 1ml loperamide (3mg/kg body weight in with the doses based on experimental design and also water for 3 days), while the normal control were administered
Dulcolax as a laxative drug control. The weight of feed intake
with the water only. The passage of reduced, hard and dry
and water intake was significantly reduced in constipated rat
fecal pellets indicated constipation in the rats.
The rats were grouped into five of three rats each, the
EFFECT OF KONJAC FLOUR OF FEED INTAKE AND WATER INTAKE
animals in group 1 (normal control) and group 2 (constipated
control) were not administered with konjac flour. Group 3 and
4 comprised constipated rats given 300 and 600 mg/kg body
weight/day of konjac flour respectively, while group 5 were
constipated rats administered with 0.75 mg/kg body weight of
Bisacodyl (Dulcolax). The water intake and feed intake of all
the rats were recorded during experiment period and treatment
Data are means ± SD (n=3): different letters from the control are
continued for 5 days. Then, the gastrointestinal transit ratio
measurement was assessed on the sixth day.
Based on Table I, normal control group had the highest
value of feed intake and significant different compare with
World Academy of Science, Engineering and Technology
International Journal of Medical Science and Engineering Vol:7 No:11, 2013
other control group. Addition of konjac flour doses had a
C. Gastrointestinal Transit Ratio
tendency to reduce feed intake of constipated rats. Meanwhile,
the water intake was highest in normal control group, but it had a different trend compare with feed intake parameter. This
is due to the increased dosage of konjac flour would increase
water consumption of constipated rats although there were no significant difference amongst konjac flour diet group (P<0.05). These result indicated that the administering of loperamide affected on feed and water intake.
In the control group, loperamide administration
Fig. 1 Data is gastrointestinal transit ratio in normal, loperamide-
significantly decreased the number of fecal weight and fecal
induced rats + konjac flour and loperamide-induced rats + dulcolax-
water content, suggesting the induction of loperamide-induced
treated rats. Data are mean of three determination ± standard
constipation (P<0.05). In the meantime, the number fecal
deviation bars with different letters from the control are significantly
pellet was no significant difference between control groups. It
indicated that the administering of loperamide was not effect of number fecal pellet.
Oral administration of loperamide (3mg/kg body weight)
for three days induced constipation on normal rats by
EFFECT OF KONJAC FLOUR ON FECAL PROPERTIES OF RATS
decreasing of fecal pellet weight and water content. This is
related to that loperamide enhances absorption of water,
electrolytes, and glucose from an isotonic buffer containing
glucose, and partially reversed the effects of PGE2
(prostaglandin E2) on water and electrolytes transport. PGE2
induced secretion of fluid in the rat intestinal tract and its
action might be related to an effect on intestinal motility [27].
Data are means ± SD (n=3): different letters from the control are
significantly reduced that secretion [28]. The drug also
In the constipated groups, when the konjac flour content in
suppresses the peristaltic contraction caused by distension of
diet was increased, the water content and weight of fecal pellet
the intestinal lumen [29]. Moreover, loperamide may reverse
increased dose-dependently, the increase being significant the elevation of hydrostatic tissue pressure that opposes with the dose 600 mg/kg body weight in comparison with the
normal absorption, when secretory stimuli increase mucosal
constipated control group (P<0.05). Moreover, in the dose 600
tension. This anti secretory effect at the mucosal is
mg/kg of konjac flour was the highest in fecal water content
accompanied by motor effects when loperamide reaches the
following with normal control group [Table II]. These result
mesenteric muopiate receptors [30]. The reduction in the water
indicated that administration of 600 mg/kg of konjac flour
consumed by the constipated animals may also be due to the
could relieved constipation by increased of water content of
effect of the drug which probably accounted for the reduction
fecal in comparison with Dulcolax (laxative drug).
in water content of the fecal pellets [14].
Loperamide administration reduced the gastrointestinal
The administration of konjac flour of Amorphophallus
motility in the untreated constipated rats [Fig. 1]. It was noted
muelleri Blume to the constipated rats was effective in
that no significant difference of ratio was observed between
influencing increased water content, weight of fecal pellet and
the constipated control and the normal control. It showed that
intestinal motility. These are indication of the laxative
the administering of loperamide had no effect on the property of the plant. This may be due to the high gastrointestinal transit ratio. The konjac flour diet increased
concentration of glucomannan as dietary fiber. Konjac
the gastrointestinal transit ratio with the increasing of the glucomanan has a property of swelling, by absorbing 138-doses. Especially for the dose 600 mg/kg of konjac flour, the
200% of water [31]. Hence, konjac have beneficial effect to
treatment of konjac flour increased the gastrointestinal relieve constipation because of its capacity to absorb and movement which compared with Dulcolax, a standard laxative
High content of dietary fiber on diet relates to fecal
consistency, because fecal consistency depends on the ratio of
the water holding capacity of the insoluble solids, such as
dietary fibers. When there are sufficient water holding solids
or little no bound water, stools remain thick or formed. On the
other hand, if there are too few of these water holding solids to
bind all of the water present, stool consistency becomes loose,
eventually to the point of being like water [32].
World Academy of Science, Engineering and Technology
International Journal of Medical Science and Engineering Vol:7 No:11, 2013
Dietary fiber is fermented by micro flora in the colon. The
result of this is to stimulate microbial growth and to increase
This research was supported by Directorate General of
microbial mass [33]. The additional mass in the colon that
Higher Education through the Minister of National Education
occurs with adequate fiber diets eases distal propulsion of and Culture, Republic of Indonesia, which has provided by a
luminal contents, and this decreased transit time means less
research funding support, through the University of Brawijaya
time for interaction between the enterocyte and luminal DIPA No. 0636/023-04.2.16/15/2012 on December 9, 2011
contents [34]. Dietary fiber fermentation by micro flora was
and by Rector decree of the University of Brawijaya No.
also to lead the production of SCFAs that lower colonic pH
and result in a significant prebiotic effect in which the growth of beneficial intestinal micro flora. The formation of SCFAs
helps to improve laxation and regularity by increasing fecal
[1] Mostafa SM, Bhandari S, Ritchie G, Gratton N, and Wenstone R. 2003.
bulk and weight and increasing the water holding capacity
Constipation and its implications in the critically ill patient. British
(and thus the hydration) of feces [35]. Intraluminal
Journal of Anaesthesia. 91 (6): 815-19.
administration of SCFAs provoked contractions at the [2] Lembo A, and Camilleri M. 2003. Chronic constipation. The New England Journal of Medicine. 349 (4): 1360-1368.
proximal colon, which migrated to the transversal and distal
[3] Biggs WS, and Dery WH. 2006. Evaluation and treatment of
colon. SCFAs caused a significant increase in the luminal
constipation in infants and children. American Family Physician. 73 (3):
concentration of 5-HT of the vascular isolated and luminal
[4] Hsieh C. 2005. Treatment of constipation in older adults. American
perfused rat colon ex vivo. 5-HT (5-hydroxytryptamine) plays
Family Physician. 72 (11): 2277-2284.
an important role in regulating colonic motility [36].
[5] Schiller LR. 2001. Review article: the therapy of constipation.
In this study, Dulcolax (bisacodyl) was used as the laxative
Alimentary Pharmacology and Therapeutics. 15: 749-763.
[6] Emmanuel AV, Tack J, Quigley EM, and Talley NJ. 2009.
drug control. Generally, the effect of the treatment with the
Pharmacological management of constipation. Neurogastroenterology
konjac flour compared favorably well to that of bisacodyl.
This is an indication that the konjac flour was effective in
[7] Niwa T, Nakao M, Hoshi S, Yamada K, Inagaki K, Nishida M, and
ameliorating constipation, thereby increasing the motility in
Nabeshima T. 2002. Effect of dietary fiber on morphine-induced constipation in rats. Bioscience, Biotechnology and Biochemistry. 66 (6):
the intestine and ease of defecation. Based on the data,
Dulcolax treatment was higher on gastrointestinal transit ratio,
[8] Oh HG, Lee HY, Seo MY, Kang YR, Kim JH, Park JW, Kim OJ, Back
but lower on water content and weight of fecal pellet than 600
HI, Kim SY, Oh MR, Park SH, Kim MG, Jeon JY, Hwang MH, Shin SJ, and Chae SW. 2011. Effects of Ficus carica paste on constipation
mg/kg konjac flour diet group. It was indicated that both of
induced by high protein feed and movement restriction in beagles.
them have difference mechanism to relieve constipation. It is
Laboratory Animal Research. 27 (4): 275-281.
well-known that, bisacodyl is a laxative drug that classified in
[9] Rush EC, Patel M, Plank LD, and Ferguson LR. 2002. Kiwifruit
promotes laxation in the elderly. Asia Pasific Journal of Clinical
stimulant agent. It has been called “stimulant” laxative
because it was thought to work by stimulating intestinal [10] Chan AOO, Leung G, Tong T, and Wong NYH. 2007. Increasing dietary motility. It is hydrolyzed in the small intestine and colon by
fiber intake in terms of kiwifruit improves constipation in Chinese patients. World Journal of Gastroenterology. 13 (35): 4771-4775.
endogenous esterase to its free form and has effects in the
[11] Widyastuti TEW, Srianta I and Lestari LA. 2008. Papaw flour (Carica
small intestine and colon [5]. The drug act by stimulating
papaya) as laxative agent on Sprague Dawley rats measured in caecum
peristalsis, sensory nerve endings (hence the frequent side
and feces. Medicinal Plant Journal. 7 (1): 76-83.
[12] Sharma S, Paliwal S, Dwivedi J, and Tilak A. 2011. First report on
effect of colic) and possibly interfering with electrolyte flux to
laxative of Citrullus lanatus. Pharmacology. 2: 790-797.
[13] Xu J, Zhou X, Chen C, Deng Q, Huang Q, Yang J, Yang N, and Huang
F. 2012. Laxative effects of partially defatted flaxseed meal on normal
and experimental constipated mice. BMC Complementary and
Oral administration of konjac flour from Amorphophallus
[14] Wintola OA, Sunmoru TO, and Afolayan AJ. 2010. The effect of Aloe muelleri Blume exhibited laxative activity in loperamide
ferox Mill. in the treatment of loperamid-induced constipation in Wistar rats. BMC Gastroenterology. 10 (95): 1-5.
induced constipated rats. The result suggested that, the [15] Ashafa AOT, Sunmonu TO, Abass AA and Oghe AA. 2011. Laxative beneficial effect of the dietary fiber is in improving bulky
potential of the ethanolic leaf extract of Aloe vera (L.) Burm. f. in wistar
feces and intestinal motility. Rats were administered with 600
rats with loperamide-induced constipation. Journal of Natural Pharmaceuticals. 2 (3): 158-162.
mg/kg body weight showed the better laxative action than the
[16] Sudari D and Winarno MW. 2010. Effect of laxative juice of
(Tamarindus indica Linn.) leaf on Wistar rats induced by Gambier fruit
The administering of loperamide affected on feed and water
extract (Uncaria gambir Roxb). Health Research and Development Media. 20, (3): 100-103.
intake of konjac flour treated rats and dulcolax-treated rats.
[17] Kakino M, Tazawa S, Maruyama H, Tsuruma K, Araki Y, Shimazawa
Numbers of fecal pellet was not affected amongst all
M, and Hara H. 2010. Laxative effect of agarwood on low-fiber diet-
treatments and normal control rats, although fecal weight and
induced constipation in rats. BMC Complementary and Alternative Medicine. 10 (68): 1-8.
fecal water content of loperamide-induced + konjac flour and
[18] Hara H, Ise Y, Morimoto N, Shimazawa M, Ichinashi K, Ohyama M,
loperamide-induced plus dulcolax treated rats were affected at
and Iinuma M. 2008. Laxative effect of agarwood leaves and its
P<0.05, by treating rats with administering konjac flour at 300
mechanism. Bioscience, Biotechnology and Biochemistry. 72 (2): 335-345.
and 600mg/kg body weight and for dulcolax-treated rats at
[19] Meite S, Bahi C, Yeo D, Datte JY, Djaman JA, and N’nguessan DJ.
2010. Laxative activities of Mareya micrantha (Benth) Mull. Arg.
World Academy of Science, Engineering and Technology
International Journal of Medical Science and Engineering Vol:7 No:11, 2013
(Euphorbiaceae) leaf aqueous extract in rats. BMC Complementary and Alternative Medicine. 10 (7).
[20] Passaretti S, Comin M, Donzelli R, Rocca F, Colombo E, Ferrara A,
Dinelli M, Prada A, and Curzio M. 1991. Action of glucomannans on complaints in patients affected with chronic constipation: a multicentric clinical evaluation. Italy Journal Gastroenterology. 23 (7): 421-425
[21] Chen HL, Cheng HC, Liu YJ, Liu SY, and Wu WT. 2006. Konjac acts
as a natural laxative by increasing stool bulk and improving colonic ecology in healthy adults. Nutrition. 22 (11): 1112-1119.
[22] Baucke VL, Miele E, and Staiano A. 2004. Fiber (Glucomannan) is
beneficial in the treatment of childhood constipation. Pediatrics. 113 (3).
[23] Signorelli P, Croce P, and Dede A. 1996. A clinical study of the use of a
combination of glucomannan with lactulose in the constipation of pregnancy. Minerva Ginecology. 48 (12): 577-582.
[24] Chen HL, Cheng HC, Wu WT, Liu YJ and Liu SY. 2008.
Supplementation of konjac glucomannan into a low-fiber Chinese diet promoted bowel movement and improved colonic ecology in constipated adults: a placebo-controlled, diet-controlled trial. Journal of the American College of Nutrition. 27 (1): 102-108.
[25] Sumarwoto. 2005. Iles-iles (Amorphophallus muelleri Blume);
Description and other properties of Iles-iles. Biodiversity. 6 (3): 185-190.
[26] Widjanarko, S.B, Faridah, A and Sutrisno, A. 2011. Effect of Multi-level
ethanol leaching on physic-chemical properties of konjac flour (Amorphophallus oncophillus). Asean Food Conference 2011. BITEC, BANGKOK, Thailand June 16-18, 2011.
[27] Shandu BK, Tripp JH, Candy DCA, and Harries J T. 1981. Loperamide:
studies on its mechanism of action. Gut. 22: 658-662.
[28] Hughes S, Higgs NB, and Turnberg LA. 1984. Loperamide has
antisecretory activity in the human jejunum in vivo. Gut. 25: 931-935
[29] Sohji Y, Kawashima K and Shimizu M. 1978. Pharmacological studies
of loperamide, an anti-diarrheal agent. Nihon Yakurigaku Zasshi. 74 (1): 155-63.
[30] Awouters F, Mengens A, Verlinden M, Schuurkes J, Niemegeers C, and
Janssen PA. 1993. Loperamid: survey of studies on mechanism of its anti-diarrheal activity. Digestive Diseases and Sciences. 38 (6): 977-995.
[31] Sumarwoto. 2006. Review: Mannan content of Iles-iles tuber
(Amorphophallus muelleri Blume). Biotechnology. 4 (1): 28-32.
[32] Saito T, Mizutani F, Iwanaga Y, Morikawa K, and Kato H. 2002.
Laxative and Anti-diarrheal Activity of Polycarbophil in Mice and Rats. Japanese Journal of Pharmacology. 89 (2): 133-41.
[33] Cummings JH. 1984. Constipation, dietary fiber and the control of large
bowel function. Postgraduate Medical Journal. 60: 811-819.
[34] Kurasawa S, Haack VS, and Marlett JA. 2000. Plant residue and bacteria
as bases for increased stool weight accompanying consumption of higher dietary fiber diets. Journal of the American College of Nutrition. 19 (4): 426–433.
[35] Slavin JL, Savarino V, Paredes-Diaz A, and Fotopoulos G. 2009. A
review of the role of soluble fiber in health with specific reference to wheat dextrin. Journal of International Medical Research. 37 (1): 1-17.
[36] Fukumoto S, Tatewaki M, Yamada T, Fujimiya M, Mantyh C, Voss M,
Eubanks S, Harris M, Pappas TN, and Takahashi T. 2003. Short-chain
fatty acids stimulate colonic transit via intraluminal 5-HT release in rats. American Journal of Physiology - Regulatory, Integrative and Comparative Physiology. 284: R1269-R1276.
CURRICULUM VITAE Surgical Treatment of Bone and Soft Tissue Tumors, Biomedical Sciences Cancer Biology EDUCATION MD: Medical Faculty of Zurich, Switzerland, 1992 MD: United States Medical Licensing Examination USMLE 1997 PhD: Biomedical Sciences, Tumor Biology, Mayo Graduate School, Mayo College of Medicine, Rochester, MN, USA, 2004 Residency in General Surgery and Neurosurgery (
International Journal of Antimicrobial Agents 35 (2010) 85–88International Journal of Antimicrobial AgentsInfections due to Candida haemulonii: species identification, antifungalsusceptibility and outcomesSheng-Yuan Ruan , Yao-Wen Kuo , Chun-Ta Huang , Han-Chung Hsiue , Po-Ren Hsueh a Department of Internal Medicine, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin, Taiwanb S