scholarly journals GAMBARAN HISTOPATOLOGIK LAMBUNG TIKUS WISTAR YANG DIBERIKAN BUAH PEPAYA SEBELUM INDUKSI ASPIRIN

2013 ◽  
Vol 1 (2) ◽  
Author(s):  
Vallery Jerry Nanlohy

Abstract: Aspirin contains acetyl salicylic acid which can cause qualitative change on the gastric mucosa. The active ingredients of papaya can increase immunity and protect the stomach from the use of aspirin and steroid. Objective: To reveal the histophatological features of the stomach of Wistar rats administered with papaya juice before aspirin induction. Method: This experimental research employed 20 wistar rats which were divided into the negative control group (A) and treatment groups. All rats were fed with regular or standard pellets for 10 days. Treatment groups were classified into four groups; rats were given papaya juice of 0.8 cc/day (group B), rats were administered aspirin of 30 mg/day (group C), rats were given papaya juice 0.8 cc/day before induced with aspirin (group D), and rats were given papaya juice 2.4 cc/day before induced with aspirin of 30 mg/day (group E). On the eleventh day, the rats were terminated to isolate the stomach followed by macroscopic and microscopic examinations. Results: It was found that the microscopic features were normal in negative control group and group B. In group C, histological examination showed acute gastritis, i.e.,inflammatory cells, edema mucosa and capillary dilatation. Rats in group D and E showed lower degree of acute gastritis compared with group C. Conclusions: Administration of papaya juice for 10 days before aspirin  is given may reduce the signs of acute gastritis as demonstrated by histopathological features of the stomach of wistar rats. Administration of papaya juice of 2.4 cc/day result in lower degree of gastritis compared with recommended dose of papaya juice (0.8 cc/day). Keywords: Aspirin, papaya, stomach.   Abstrak: Aspirin mengandung asam asetil salisilat  yang dapat menimbulkan perubahan kualitatif mukus lambung. Bahan aktif buah pepaya dapat meningkatkan kekebalan dan melindungi lambung dari penggunaan obat aspirin dan steroid. Tujuan: Untuk mengetahui gambaran histopatologik lambung tikus wistar yang diberikan jus buah pepaya sebelum induksi aspirin. Metode: Penelitian eksperimental ini menggunakan 20 ekor tikus wistar yang dibagi dalam kelompok kontrol negatif (A) dan kelompok perlakuan yang diberikan diet pellet standar selama 10 hari. Kelompok perlakuan dibagi dalam empat kelompok, yaitu  kelompok  yang diberikan jus pepaya 0,8 cc/hari (B), kelompok  yang diberikan aspirin 30 mg/hari (C),  kelompok  yang diberikan jus pepaya 0,8 cc/hari sebelum diinduksi aspirin (D), dan kelompok  yang diberikan jus pepaya 2,4 cc/ hari sebelum diinduksi aspirin 30 mg/hari (E). Pada hari ke-11 Tikus wistar diterminasi  untuk diambil lambungnya yang kemudian diamati secara makroskopik dan mikroskopik. Hasil: Penelitian ini menunjukkan gambaran mikroskopik yang normal pada kelompok kontrol negatif dan perlakuan B. Pada kelompok perlakuan C menunjukkan gambaran histologik gastritis akut, yaitu sel-sel radang, edema mukosa, dan pelebaran kapiler. Pada kelompok perlakuan D dan E menunjukkan gambaran histologi gastritis akut yang lebih ringan dibandingkan dengan kelompok perlakuan C. Simpulan: Pemberian jus buah pepaya sebelum pemberian aspirin selama 10 hari dapat mengurangi tanda-tanda gastritis akut yang terlihat pada gambaran histopatologik lambung tikus wistar. Pemberian jus buah pepaya sebanyak 2,4 cc/hari menghasilkan gambaran gastritis  yang lebih ringan dibandingkan dengan pemberian dosis anjuran (0,8 cc/hari) jus buah pepaya. Kata Kunci: Aspirin, pepaya, lambung.

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Abel T. Bawulele ◽  
Lily Loho ◽  
Poppy Lintong

Abstract: Cayenne pepper (Capsicum frustescens L ) is commonly in daily food. This study aimed to determine the effect of cayenne pepper to histopathological changes in gaster of Wistar rats induced by aspirin. This was an experimental study. Subjects were Wistar rats consisted of 5 rats as the negative control and 20 rats as the treatment group. Group A, the negative control group, was untreated; group B was treated with aspirin 21mg/day for 10 days; group C was treated with aspirin 21mg/day for 10 days together with cayenne pepper 84mg once daily; group D was treated with aspirin 21mg/day for 10 days followed by cayenne 84mg twice daily; and group E was treated with aspirin 21mg/day for 10 days and then was untreated for 3 days. The histopathological changes in group C showed a lot of inflammatory cells and erosion of gastric mucosa epithelium compared to group B, D, and E. Group D also showed inflammatory cells but no erosion as in group C. Group E had less inflammatory cells than group B, C, and D. Conclusion: Administration of aspirin 21mg/kg BW for 10 days led to acute gastritis in Wistar rat. Administration of aspirin together with cayenne 84mg/day led to acute gastritis and erosion of gastric mucosa epithelium. However, administration of cayenne pepper 168mg/day after aspirin led to acute gastritis without erosionKeywords: pepper, gaster, aspirinAbstrak : Cabe Rawit (Capsicum frustescens L.) banyak dijumpai dalam makanan sehari-hari. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian cabe rawit terhadap gambaran histopatologik lambung tikus wistar yang diinduksi aspirin. Jenis penelitian ialah eksprimental. Subjek penelitian ialah tikus wistar, yang dibagi atas: 5 ekor untuk kontrol negatif dan 20 ekor untuk perlakuan. Kelompok A (kontrol negatif) tidak diberi perlakuan; kelompok B diberikan aspirin 21mg/hari selama 10 hari; kelompok C diberikan aspirin 21mg/hari selama 10 hari bersama cabe rawit 84mg sekali sehari; kelompok D diberikan aspirin 21mg/hari selama 10 hari kemudian dilanjutkan pemberian cabe rawit 84mg selama 3 hari 2 kali sehari; dan kelompok E diberikan aspirin 21mg/hari selama 10 hari kemudian tidak diberi perlakuan selama 3 hari. Hasil penelitian menunjukkan bahwa pada kelompok C terlihat banyak sel-sel radang disertai erosi epitel mukosa lambung dibanding dengan kelompok B, D, dan E. Pada kelompok D pemberian aspirin dilanjutkan dengan cabe rawit dosis 2 kali sehari masih terdapat sel-sel radang tetapi tidak terjadi erosi seperti pada kelompok C. Kelompok E memiliki sel-sel radang yang lebih sedikit dibandingkan kelompok B, C, dan D. Simpulan: Pemberian aspirin 21mg/hari selama 10 hari menyebabkan gastritis akut pada tikus wistar. Pemberian aspirin bersama cabe rawit 84mg/hari menyebabkan gastritis akut erosi sedangkan pemberian cabe rawit 168mg/hari setelah diberi aspirin menyebabkan gastritis akut tanpa erosi.Kata kunci: cabe rawit, lambung, aspirin


2013 ◽  
Vol 1 (1) ◽  
Author(s):  
Juita Pasaribu ◽  
Lily Loho ◽  
Poppy Lintong

Abstrak: Gastritis akut merupakan proses inflamasi yang bersifat akut dan biasanya terjadi pada bagian permukaan mukosa lambung. Penyakit ini biasanya disebabkan karena banyak faktor salah satunya yaitu penggunaan asam mefenamat dalam dosis yang berlebihan. Pada penelitian yang telah dilakukan sebelumnya didapatkan bahwa lengkuas dapat mengurangi terjadinya radang akut. Tujuan penelitian ini adalah untuk mengetahui gambaran histopatologi lambung tikus wistar yang diberikan lengkuas setelah diinduksi dengan asam mefenamat. Penelitian ini menggunakan metode eksperimental dengan sampel 11 ekor tikus wistar yang dibagi dalam 4 kelompok perlakuan. Kelompok A tidak diberikan perlakuan. Kelompok B diberikan asam mefenamat 10 mg selama 7 hari. Kelompok C diberikan asam mefenamat 10 mg selama 7 hari kemudian diberikan perasan lengkuas selama 7 hari. Kelompok D diberikan asam mefenamat 10 mg kemudian tidak diberikan perlakuan selama 7 hari. Hasil penelitian ini menunjukkan bahwa gambaran mikroskopik lambung tikus wistar pada kelompok C terdapat sel-sel radang PMN yang lebih sedikit dibandingkan dengan kelompok B dan D. Simpulan: lengkuas dapat mengurangi sel-sel radang PMN pada mukosa lambung yang diberikan dengan asam mefenamat. Kata kunci: Lengkuas, Asam Mefenamat, Gastritis akut.   Abstract : acute gastritis is an acute inflammatory process normally occurring in the mucosal lining of the stomach. This disease is caused by a variety of factors, one of which is the use of mefenamat acid in large doses. Previous research has revealed that galangal can be used to reduce acute inflammation. The objective of this research was to reveal the histopathological pictures of stomach of wistar rats that treatment with galangal after induce by mefenamat acid. This study is an experimental, employing 11 wistar rats which were assigned for four treatment groups. Group A was the control group in which the rats received no treatment. Rats in group B were administered mefenamat acid 10 mg for 7 days. In group C, the rats were also administered mefenamat acid 10 mg for 7 days and then received galangal distillation for 7 days. In group D, rats were administered mefenamat acid 10 mg for 7 days and then for 7 days without receiving anymore mefenamat acid or galangal distillation. Results showed that microscopic pictures of stomach of wistar rats in group C were presented with PMN inflammatory cells fewer than rats in group B and D. Conclusion: galangal can reduce PMN inflammatory cells in mucosal lining of the stomach exposed to mefenamat acid. Key words: galangal, mefenamat acid,  acute gastritis.


2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Chelyne F. Sundalangi ◽  
Lily Loho ◽  
Carla F. Kairupan

Abstract: Aspirin is an anti-inflammatory drug which can cause side effect such as damage of the gastric mucous. Soursop leaf is usually used for medical treatment because it contains flavonoid compound which has the antioxidant and anti-inflamatory activity and may protect gastric mucous from the side effects of aspirin. This study aimed to reveal the histopathological features of the gaster of wistar rats administered with soursop leaf extract after induced with aspirin. This was an experimental study using 20 Wistar rats. Rats were divided into negative control group (A) and treatment groups. Treatment groups were divided into; rats induced with aspirin 30mg for 10 days (B); rats administered with soursop leaf extract 80mg before induced with aspirin 30mg for 10 days (C); rats induced with aspirin 30mg for 10 days and administered with soursop leaf extract 80mg for the next 3 days (D); and rats induced with aspirin 30mg for 10 days and not treated for the next 3 days (E). Groups A, B and C were terminated on 11th day, meanwhile groups D and E were terminated on 14th day. The results showed normal histological features in group A. Group B showed acute gastritic features such as many PMN inflammatory cells in the mucous to serous layers, submucous edema, and capillary dilatation. Groups C and D showed many PMN inflammatory cells in the mucous to submucous layers. Group E showed decreased PMN inflammatory cells in mucous to submucous layers. Conclusion: Administration of soursop leaf extract could not decrease the acute gastritic signs such as inflammatory cells, edema and capillary dilatation in the gaster of Wistar rats induced with aspirin.Keywords: aspirin, soursop leaves, gaster. Abstrak: Aspirin merupakan obat anti inflamasi yang bisa menyebabkan efek samping gangguan mukosa lambung. Daun sirsak sering digunakan sebagai obat tradisional yang berkhasiat karena mengandung senyawa flavonoid yang berkhasiat sebagai antioksidan dan antiinflamasi yang mungkin dapat melindungi lambung dari efek samping aspirin. Penelitian ini bertujuan untuk mengetahui gambaran histopatologik lambung tikus Wistar yang diberikan ekstrak daun sirsak setelah induksi aspirin. Jenis penelitian ini ialah eksperimental yang menggunakan 20 ekor tikus Wistar. Hewan uji dibagi dalam kelompok kontrol negatif (A) dan kelompok perlakuan. Kelompok perlakuan dibagi atas kelompok tikus yang diberi aspirin 30mg selama 10 hari (B); tikus yang diberi ekstrak daun sirsak 80mg sebelum induksi aspirin 30mg selama 10 hari (C), tikus yang diberi aspirin 30mg selama 10 hari dan diberikan ekstrak daun sirsak 80mg selama 3 hari berikutnya (D); dan tikus yang diberi aspirin 30mg selama 10 hari dan tidak diberi perlakuan selama 3 hari berikutnya (E). Kelompok A, B dan C diterminasi pada hari ke-11, kelompok D dan E diterminasi pada hari ke-14. Hasil penelitian menunjukkan gambaran histologik lambung normal pada kelompok A. Kelompok B menunjukkan gambaran histopatologik gastritis akut yakni baanyak sel-sel radang PMN pada lapisan mukosa sampai serosa, edema submukosa, dan pelebaran pembuluh darah kapiler. Kelompok C dan D menunjukkan banyak sel-sel radang PMN pada lapisan mukosa sampai submukosa. Kelompok perlakuan E menunjukkan sel-sel radang PMN yang lebih sedikit pada lapisan mukosa sampai submukosa. Simpulan: Pemberian ekstak daun sirsak tidak dapat mengurangi tanda-tanda gastritis akut berupa sel-sel radang, edema, dan pelebaran pembuluh darah kapiler pada lambung tikus wistar yang diinduksi aspirin. Kata kunci: aspirin, daun sirsak, lambung


Author(s):  
Dongqing XU ◽  
Jianwen Jianwen LI ◽  
Fangfang JIANG ◽  
Kaishuang CAI ◽  
Guangxue REN

Background: To investigate the effect of vascular endothelial growth factor (VEGF) on tumor angiogenesis in gallbladder carcinoma. Methods: Fifty one patients with gallbladder carcinoma were enrolled as observation group. Thirty healthy people were included as control group. Chemically synthesized siRNA sequences targeting VEGF was transfected with VEGF-siRNA. A blank group (group B), a negative control group (transfected with independent sequence, group C), and an inhibition group (transfected with VEGF siRNA, group D) were established. Physiological saline was set as group A. The expression of VEGF was detected by qRT-PCR. The expression of VEGF protein was detected by Western blot. MVD was used to measure microvessel density. CCK-8, Transwell and flow cytometry were used to detect cell proliferation, invasion and apoptosis. Results: The tumor volume of nude mice and VEGF mRNA expression in group D was significantly smaller than that in group B and C (P<0.05). The MVD density in group B and C was significantly higher than that in group D (P<0.01). The proliferation of cells was detected from the 3rd day, and the proliferation of cells in the blank and negative control groups was faster than that of the inhibition group (P<0.05). The apoptosis rate of the blank group and the negative control group was lower than that of the inhibition group (P<0.001). Conclusion: VEGF is highly expressed in serum of patients with cholangiocarcinoma, it promotes angiogenesis, proliferation and invasion of gallbladder cancer cells, and inhibits apoptosis of tumor cells.


Author(s):  
Desie Dwi Wisudanti ◽  
Rena Normasari ◽  
Firman Herdiyana

<strong>Background</strong><br />Diazinon is a widely used pesticide to eradicate agricultural pests globally with the potential to cause harmful effects on humans by generating free radicals and depleting endogenous antioxidants. Soy flour possesses high antioxidant effect. This study evaluated the nephroprotective effect of soy flour  on diazinon-induced nephrotoxicity in rats. <br /><br /><strong>Methods</strong><br />An experimental laboratory study was carried out involving 30 male Wistar rats were randomly divided into five groups of 6 rats. The normal control (Kn) and the negative control (K-) groups <em>received</em> normal saline, the treatment groups (K1, K2, K3) received 10%, 15%, and 20% soy flour in distilled water, respectively, on day 1 to day 28. Subsequently, for five days, all groups received diazinon 40 mg/kg, except for the normal control group. Blood urea nitrogen (BUN) and creatinine levels were measured at the end of the study. The Kruskal Wallis test with the post hoc Mann Whitney U test were used to analyze the data. <br /><br /><strong>Results</strong><br />Blood urea nitrogen and creatinine levels were lower in all treatment groups (K1, K2, K3) compared to the negative control group (K-), while the K3 level was the lowest (24.28 ± 1.56 mg/dL and 0.93 ± 0.14 mg/dL).  There was a significant decrease in BUN and creatinine levels in the experimental rats of the 15% and 20% soy flour groups (K2, K3) compared to the negative control group (K-).<br /><br /><strong>Conclusion</strong><br />Administration of soy flour (Glycine max (L.) Merr.) had a nephroprotective effect in preventing increases in BUN and creatinine levels of diazinon-induced nephrotoxic male Wistar rats.


Author(s):  
Henni Vanda ◽  
Muhammad Hambal ◽  
Farida Athailah ◽  
Mustafa Sabri

A study has been conducted to investigate the effect of two local herbs in Indonesia; Areca catechu nut and Sauropus androgynous leaf, combined with mineral block to treat gastro intestinal nematode in goats. A.catechu is well known to have anthelmintic property due to its alkaloid and tannin content, and S.androgynus also contains tannin, alkaloid and steroid that will enhance the anthelmintic property of those herbals.  As many as 80 goats had been divided into 4 groups; 20 were treated with albendazole (Group A), 20 were given A.catechu and S.androgynus (Group B), 20 were given combination of A.catechu, S.androgynus, and mineral block (Group C), and 20 as negative control (Group D). The result revealed that herbal treatment showed significantly effective toward nematodes in gastro intestinal, demonstrated by declining egg worm of Group B and C. Body weight improvement and overall performance in Group C was higher compared to other groups. However, goats treated with albendazole showed slightly better results in the decreasing amount of egg worms found after treatment. Nevertheless, A.catechu and S.androgynus are potential anthelmintic herbal; combination with mineral block will enhance the anthelmintic activity. Therefore they are good options for treating helminthiasis in livestock.   


2015 ◽  
Vol 44 (2) ◽  
pp. 113-117
Author(s):  
Dayse Andrade Romão ◽  
Guilherme José Pimentel Lopes de Oliveira ◽  
José Ivo Limeira dos Reis ◽  
Lucineide de Melo Santos

Objective To evaluate the development of recurrent caries after exposure to fluoride dentifrices with different concentrations. Material and method: 48 samples of bovine incisors (4x4mm2) were exposed to pH cycling for 7 days before the preparation of the cavities (2mm deep). The samples were restored with a microhybrid resin composite. Then, the samples were exposed to thermal cycling (350 cycles) and they were randomly allocated into 4 treatment groups (n = 12): Group A - non-fluoridated dentifrice (negative control); Group B - 500 ppm dentifrice; Group C - 750 ppm dentifrice; group D - 1100 ppm dentifrice (positive control). The samples were treated with solutions of each dentifrice (9.6 ml water/1.6 g dentifrice) for 60 seconds and then were immersed in demineralizing (3 h) and remineralizing (2 h) solutions 3 times a day. Next, the samples were immersed in a remineralizing solution for 18 hours. Then, the blocks were sectioned for examination of the length of the outer caries lesion, using polarized light microscopy. The ANOVA parametric test complemented by the Tukey test with a confidence level of 95%, were used in the statistical analysis. Result: A smaller lesion length was observed in the group treated with the fluoride concentration of 1100 ppm F, but there were no differences between toothpastes with fluoride concentrations of 500 and 750 ppm F. Conclusion: The use of fluoride dentifrices (1100 ppm) reduces the development of caries adjacent to dental restorations.


2016 ◽  
Vol 40 (5) ◽  
pp. 404-409 ◽  
Author(s):  
Meghna Bajaj ◽  
P Poornima ◽  
S Praveen ◽  
NB Nagaveni ◽  
KB Roopa ◽  
...  

Objectives: To compare CPP-ACP, Tri-calcium phosphate and Hydroxyapatite on remineralization of artificial caries like lesions on primary enamel. Study design: Ten extracted Primary molars coated with nail varnish, leaving a window of 2×4 mm on buccal and lingual surface were immersed in demineralizing solution for 96 hours and sectioned longitudinally to obtain 40 sections (4 sections per tooth) and were randomly divided into 4 groups (A to D) n=10; Group A: negative control, Group B: CPP-ACP, Group C: Tri-calcium phosphate, Group D: Hydroxyapatite. Sections were subjected to pH cycling for 10 days and were evaluated by polarized light microscope before and after treatment. Results: Intra group comparison of demineralization and remineralization was done by paired t-test. One way ANOVA was used for multiple group comparisons followed by post HOC TUKEY'S Test for group wise comparisons. Remineralization was found more with Group D followed by Group B, C and A. Conclusion: Hydroxyapatite showed better remineralization when compared to CPP-ACP and Tri-calcium phosphate.


2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Siti Aisyah ◽  
Ummu Balqis ◽  
Eko Karunia Friyan

This research aims to study the histopathological picture of rats (Rattus norvegicus) heart as a result of the provision of waste cooking oil3x, 6x, and 9x frying. This study used 20 male white rats (Rattus norvegicus) weighing of ± 300 g. Rats were grouped into 4 treatment groups,adapted for one week, feed and drink ad libitum. The second week to eight week rats were given orally cooking oil every day with a dose of 1 ml. A group of rats was given cooking oil (negative control). Group B, C, and D were given cooking oil 3x, 6x, and 9x frying. Mi ce were euthanizedafter 60 days, then necropsied to collect the heart. Heart was then put into Neutral Buffered Formalin (NBF) for fixation, then follow withhistopathology preparation. Parameters measured were hyperemia, hemorrhage, degeneration, necrosis of the heart. Results were analyzeddescriptively with the scoring system. Test results are grouped into three categories, namely, mild (+), moderate (++), and weight (+++). Thehystopathological results of the heart found were an increasing number of hyperemia, hemorrhage, degeneration, necrosis as a result of thefrequency of frying.____________________________________________________________________________________________________________________Key words: heart, cooking oil, rats 


2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Koernia H. Yonathan ◽  
Poppy M. Lintong ◽  
Meilany F. Durry

Abstract: Excessive exposure of sunlight may cause hyperpigmentation. Cocoa is a beneficial plant to the skin. This study was aimed to reveal the effect of cocoa bean extracts on the number of melanin pigments in rat skin after sun exposure. This was an experimental study using 25 Wistar rats (Rattus norvegicus) divided into one control group and four treatment groups. The treatment consisted of sunlight exposure for one hour/day and application of cocoa bean extract 1600 mg/day that varied among treatment groups. Group A was the negative control group (terminated at day 21). Group B, the treatment group 1, was exposed to sunlight for 30 days (terminated at day 31). Group C, the treatment group 2, was exposed to sunlight for 20 days (terminated at day 31). Group D, the treatment group 3, was divided into group D1 consisted of 2 rats and group D2 consisted of 3 rats. Group D1 was exposed to sunlight 30 minutes after the application of cocoa bean extract for 20 days (terminated at day 21). Group D2 was exposed to sunlight 30 minutes after the application of cocoa bean extract for 30 days (terminated at day 31). Group E was exposed to sunlight for 20 days and continued with the application of cocoa bean extract for the next 10 days (terminated at day 3). The results showed that sunlight exposure increased the number of melanin pigments in group B and C compared to group A. Group D showed fewer melanin pigments than group B and C. Group E showed fewer melanin pigments than group B, C, and D. Conclusion: Cocoa bean extract could reduce the number of skin melanin pigments in rats exposed to sunlight.Keywords: cocoa beans extract, sunlight, melanin pigment, skin Abstrak: Paparan sinar matahari yang berlebihan dapat menyebabkan hiperpigmentasi. Kakao merupakan tanaman yang berkhasiat untuk pemeliharaan kesehatan kulit. Penelitian ini bertujuan untuk mengetahui pengaruh pengolesan ekstrak biji kakao dan pemaparan sinar matahari terhadap jumlah pigmen melanin kulit tikus Wistar. Jenis penelitian ialah eksperimental dengan menggunakan 25 tikus Wistar (Rattus norvegicus) yang dibagi menjadi satu kelompok kontrol dan empat kelompok perlakuan. Perlakuan yang diberikan ialah paparan sinar matahari selama 1 jam/hari dan aplikasi ekstrak biji kakao dosis 1600 mg/hari yang bervariasi untuk masing-masing kelompok perlakuan. Kelompok A merupakan kontrol negatif (diterminasi hari ke-21). Kelompok B ialah kelompok perlakuan 1, diberi paparan sinar matahari selama 30 hari (diterminasi pada hari ke-31). Kelompok C ialah kelompok perlakuan 2, diberi paparan sinar matahari selama 20 hari (diterminasi hari ke-31). Kelompok D ialah kelompok perlakuan 3 yang dibagi menjadi kelompok D1 terdiri dari 2 tikus dan D2 dari 3 tikus. Kelompok D1 diberi paparan sinar matahari setelah diolesi ekstrak biji kakao 30 menit sebelumnya selama 20 hari (diterminasi hari ke-21). Kelompok D2 diberi paparan sinar matahari selama 1 jam setelah diolesi ekstrak biji kakao 30 menit sebelumnya selama 30 hari (diterminasi pada hari ke-31). Kelompok E ialah kelompok perlakuan 4 yang diberi paparan sinar matahari 20 hari dan dilanjutkan dengan pengolesan ekstrak biji kakao untuk 10 hari berikutnya (diterminasi hari ke-31). Hasil penelitian memperlihatkan bahwa kelompok B dan C menunjukkan peningkatan jumlah pigmen melanin dibandingkan kelompok A. Kelompok D menunjukkan jumlah pigmen melanin yang lebih sedikit dibandingkan kelompok B dan C. Kelompok E menunjukkan jumlah pigmen melanin yang lebih sedikit dibandingkan kelompok B, C, dan D. Simpulan: Ekstrak biji kakao dapat mengurangi jumlah pigmen melanin kulit tikus Wistar yang dipapar sinar matahari. Kata kunci: ekstrak biji kakao, sinar matahari, pigmen melanin kulit


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