killing orthotopic melanoma in vivo , maintaining body leukocyte number , and improving living states of tumor - bearing mice , by rlz - 8 male kunming mice of 6 - 8 weeks , weighed 18 - 22 g , were purchased from laboratory animal center of norman bethune university of medical science , and reared at a specific pathogen - free ( spf ) condition in northeast normal university , at a temperature controlled at ( 20 ± 2 )° c . and a humidity of 48 %, and in 12 hours alternating lighting . the mice were transplanted with a melanoma cells line b16 - f10 . dulbecco &# 39 ; s modified eagle medium ( dmem ), fetal bovine serum , phosphate buffer saline ( pbs ), trypsin - edta , dimethyl sulfoxide ( dmso ), 0 . 9 % nacl solution , tris - hcl buffer with ph 7 . 6 for rinsing , 0 . 05 % trypsin , rlz - 8 , and dtic ( positive contrast drug ). co 2 thermostat incubator , inverted microscope , pipette , tweezers , clean bench , hematology analyzer , low - speed centrifuge , ultra - low temperature freezing storage cabinet , electronic balance , fresh - keeping cabinet , refrigerator , sterilized pot , water bath pot ; mouse raising boxes , water containers ; disposable medical sterilized gloves , medical sterilized cotton , 50 ml centrifugal tube , pipette tip , cryogenic vial , 10 cm cell culture plate , culture flask , 1 . 5 ml ep tube , and cell counting camber ; disposable 1 ml syringe , mouse bedding , and mouse food . the mice melanoma cells b16 - f10 were cultured in the dmem containing 10 % fetal bovine serum , at 37 ° c . in the co 2 thermostat incubator . 200 μl of b16 - f10 cell suspension ( containing 1 × 10 7 cells ) was slowly subcutaneously injected into a dorsal - ventral side of the mouse through 1 ml syringe , so as to establish a model of mice transplanted with tumors . after 24 hours , the mice were tail - intravenously injected with the rlz - 8 ( 123 μg / kg , 246 μg / kg and 492 μg / kg ), the dtic ( 2 . 5 mg / kg ) and the physiological saline respectively . the rlz - 8 was injected once per day ; the dtic was continuously tail - intravenously injected for 5 days and injected for a second time after 3 weeks . during the experiment , living states of the mice were observed ; the mice were weighed once every 7 days ; blood samples were taken from tail veins of the mice every 2 weeks ; volumes of the tumors , subcutaneously injected into the mice , were measured every 2 days ; for each group , the tumors were dissected at an end of the experiment and weighed on the balance , with weights recorded . according to a formula that a tumor growth inhibition rate =( an average weight of the tumors of the physiological saline group − an average weight of the tumors of the drug administrated groups )/ the average weight of the tumors of the physiological saline group , the inhibition rate of the rlz - 8 upon the growth of the orthotopic tumor was calculated . after the 28 days of continuously administrating the rlz - 8 to the tumor - bearing mice , no significant difference was observed in aspects of hair glossiness , basic feeding and excrement among the rlz - 8 groups ( three dosages ), the dtic group , the physiological saline group and a normal group ; the physiological group had poorer movement and agility than the rlz - 8 groups and the dtic group , and especially the rlz - 8 high dosage group had significantly higher agility than the physiological saline group . after the 56 days of continuously administrating the rlz - 8 , it was observed that the rlz - 8 administrated groups had better hair glossiness than the negative contrast group and the dtic group . ( 2 ) analysis result about impact of treatment drug on mice weights after the 28 days of continuously administrating the rlz - 8 to the tumor - bearing mice , no significant difference existed among the weight of each group before the experiment ; after the experiment , the rlz - 8 high dosage group had the slightly smaller weight than the other groups , as showed in fig1 . after the 56 days of continuously administrating the rlz - 8 , the rlz - 8 groups and the dtic group had larger weights than the negative contrast group , while the five experiment groups all had the smaller weights than the normal group , as showed in fig2 . after the 28 days of continuously administrating and then 28 days of raising without drug administration , for the weights of the finally survived mice , the dtic group and the rlz - 8 low dosage group had smaller weights than the negative contrast group , and the five experiment groups had the smaller weight than the normal group , which indicated that the rlz - 8 is able to adjust body states of the mice . the tumors were dissected and weighed , and then an average weight of the tumors of each group was calculated . as showed in table 1 and table 2 , after the 28 days of administrating the rlz - 8 , the rlz - 8 high dosage group had the smaller tumor weight than the dtic group ; for the three rlz - 8 groups , with a concentration of the rlz - 8 gradually increased , the weight of the tumor gradually decreased . the rlz - 8 groups had significant difference over the negative contrast group , while the rlz - 8 low dosage group , the rlz - 8 medium dosage group and the rlz - 8 high dosage group had significant difference ( n = 10 , p & lt ; 0 . 05 ). when the drug administration days reach 56 days , by weighing the tumors of the survival mice , the rlz - 8 groups had better tumor inhibition effect than the dtic group , and especially the rlz - 8 high dosage group had significant difference over the dtic group ( n = 10 , p & lt ; 0 . 05 ). therefore , after the 28 days of administrating the rlz - 8 , the rlz - 8 high dosage group had smaller tumor weight than the dtic group ; among the three rlz - 8 groups , with the concentration of the rlz - 8 gradually increased , the weight of the subcutaneous tumor gradually decreased ; when the days of administration elongated to 56 days , the tumor weights of the survival mice indicated that the rlz - 8 groups had significant tumor inhibition effect over the dtic group . for the 28 days of drug administration , with the rlz - 8 concentration gradually increased , the volume of the subcutaneous tumor gradually decreased ; the rlz - 8 groups had significantly smaller tumor volumes than the dtic group , and especially the rlz - 8 groups had significant inhibition on the growth of the tumor compared with the contrast group ( n = 10 ). analyzed from the volumes of the tumors , as showed in table 1 , for the 28 days of the drug administration , the rlz - 8 high dosage group had higher tumor inhibition rate than the dtic group ; among the rlz - 8 groups , with the drug dosage gradually increased , the inhibition rate gradually enhanced . when the days of the drug administration elongated to 56 days , the rlz - 8 groups had particularly significant tumor inhibition rates compared with the dtic group . ( 4 ) test result of drug tolerance reaction of body against dtic and rlz - 8 while inhibiting the weight of the body tumor , the dtic and the rlz - 8 had a certain impact on the drug tolerance of the body . as showed in table 1 and table 2 , after administrating the dtic for 28 days and for 56 days , the inhibition rate greatly decreased , and the tumor growth rate greatly increased , which indicated that the body gradually generated tolerance against the dtic along with an elongation of a dtic administration time , so that the tumor inhibition weakened ; however , after administrating the rlz - 8 for 28 days and for 56 days , the inhibition rate greatly increased , which indicated that the body tolerance did not increase with an elongation of a rlz - 8 administration time and further proved that the rlz - 8 had healing effect far better than the dtic . by administrating for 28 days , with the gradually increased rlz - 8 concentration , the body leukocyte number of the mice slightly increased , while the body leukocyte number of the positive drug group ( dtic ) evidently decreased ; especially each rlz - 8 group had particularly significant impact on the body leukocyte number compared with the contrast group ( n = 10 ). by elongating the administration time to 56 days , the leukocyte number of each rlz - 8 group showed significance over the dtic group ( n = 10 ), as showed in fig3 ; the body leukocyte number of the dtic group reached a minimal value . by administrating the drug for 28 days and continuing raising without drug administration , the body leukocyte number of the rlz - 8 group slightly decreased ; the body leukocyte number of the dtic group continuously decreased and then showed a stable state for a while . analyzed from the body leukocyte number , it was showed that the rlz - 8 group exhibited small impact on the body leukocyte number in the anti - tumor treatment experiment , while the positive drug group ( dtic ) greatly decreased the body leukocyte number in the anti - tumor treatment experiment , and damaged and weakened the body immune function , causing a hidden danger of immune deficiency in the anti - tumor treatment process . furthermore , in the anti - tumor experiment , the rlz - 8 not only was able to effectively inhibit the growth of the tumor , but also had functions of maintaining and protecting body immunity . the rlz - 8 had better safety than the positive drug group ( dtic ). after continuously administrating the drug for 28 days , no mice died in the experiment period . after continuously administrating the drug for 56 days , death emerged in the negative contrast group and the positive drug group ( dtic ), wherein massive death emerged in the positive drug group ( dtic ). however , no mice died in each rlz - 8 dosage group , as showed in table 3 . therefore , the rlz - 8 showed significant difference in maintaining the life elongation rate of the tumor - bearing mice over the dtic , with significant advantage . male kunming mice of 6 - 8 weeks , weighed 18 - 22 g , were purchased from laboratory animal center of norman bethune university of medical science , and reared at an spf condition in northeast normal university , at a temperature controlled at ( 20 ± 2 )° c . and a humidity of 48 %, and in 12 hours alternating lighting . the mice were transplanted with a melanoma cells line b16 - f10 . dmem , fetal bovine serum , pbs , trypsin - edta , dmso , tris - hcl buffer with ph 7 . 6 for rinsing , 0 . 05 % trypsin , rlz - 8 , and dtic . the mice melanoma cells b16 - f10 were cultured in the dmem containing 10 % fetal bovine serum , at 37 ° c . in the co 2 thermostat incubator . 200 μl of b16 - f10 melanoma cell suspension ( containing 1 × 10 7 cells ) was slowly intravenously injected into a tail vein of the mouse through 1 ml syringe , so as to establish a model of mice transplanted with tumors . after 24 hours , the mice were tail - intravenously injected with the rlz - 8 ( 123 μg / kg , 246 μg / kg and 492 μg / kg ), the dtic ( 2 . 5 mg / kg ) and the physiological saline respectively . the rlz - 8 was injected once per day ; the dtic was continuously tail - intravenously injected for 5 days and injected for a second time after 3 weeks . after the mice were put to death , lungs of the dead mice were dissected out and the number of black spots on surfaces of the lungs , formed by an aggregation of metastasis cell , was counted , so as to calculate the inhibition rate of the drug against the growth of the lung metastasis as : inhibition rate =( an average metastasis number of the negative contrast group − an average metastasis number of the drug administrated group )/ the average metastasis number of the negative contrast group × 100 %. a time and the number of the dead mouse in each experiment group were recorded in detail , especially during administrating the drug continuously , until the negative contrast group was completely dead ; and then , the survival states of the mice in the experiment groups and the contrast groups were analyzed . a survival rate was calculated according to the number of the dead mice in the other groups when all the mice of the negative contrast group were dead , based on a formula that survival rate =( a total number of the mice − the number of the dead mice )/ the total number of the mice . based on an analysis about the statistics of the melanoma lung metastases , each rlz - 8 dosage group had the smaller number of the tumor metastases than the negative contrast group and the positive contrast group ; the positive contrast group had evidently fewer metastases than the negative contrast group . according to the formula of the inhibition rate , the tumor metastasis inhibition rate of the drug in each group was calculated . as showed in fig4 , for the 28 days of administrating the drug , the rlz - 8 low dosage group had the inhibition rate of 62 . 13 ± 1 . 88 % compared with the contrast group ; the rlz - 8 medium dosage group had the inhibition rate of 67 . 65 ± 2 . 1 % compared with the contrast group ; and , the rlz - 8 high dosage group had the inhibition rate of 71 . 17 ± 2 . 43 % compared with the contrast group . therefore , the rlz - 8 evidently inhibited the formation and the growth of the b16 - f10 lung metastases which were intravenously injected into the tail vein of the mice . the positive contrast group had the inhibition rate of 32 . 04 ± 1 . 27 %, lower than the three experiment drug groups , which indicated that the rlz - 8 had better inhibition effect on the b16 - f10 lung metastases which were intravenously injected into the tail vein of the mice , than the positive drug dtic , as showed in table 4 . as showed in table 4 , by recording the time and the number of the dead mouse in each group in detail , the survival states of the mice in the experiment groups and the contrast groups were analyzed . when all the mice of the negative contrast group were dead ( respectively on the 87 th day and on the 95 th day after injecting the tumors , in two repeated tests ), the survival rate of the mice remained in the positive drug dtic group was 10 %, namely that 10 % of the initial total number of the mice were still alive ; the survival rates of the three experiment groups with different concentrations of the experiment drug were respectively 25 %, 30 % and 10 %. concluded from the results , the positive drug and the experiment drug were effective for an elongation of the survival time of the mice to some extent . generally speaking , the experiment drug elongated the survival time of the mice and improved the life elongation rate better than the positive drug dtic . generation of antibody and neutralizing antibody after continuous multiple administration in vivo of rlz - 8 to macaca fascicularis as a fungal recombinant genetic engineering drug , it is crucial to track generation of antibody of the rlz - 8 for a preclinical evaluation . blood serum of normal monkeys , macaca fascicularis , after being continuously administrated , was selected for testing antibody of the rlz - 8 by elisa and for testing a neutralization activity of anti - rlz - 8 antibody by a biological activity method . on the 9 th - 11 th days of administrating the drug , three monkeys were tested to have low titer ( 1 : 5 ) of the anti - rlz - 8 antibody ; after the 28 th day of administrating , the titer of the antibody maintained low , within a range of 1 : 25 to 1 : 125 . no anti - rlz - 8 antibody was tested from the monkeys of the contrast group . based on a study about impacts of culture media , with the anti - rlz - 8 antibody positive ( 1 : 125 ) monkey blood serum ( diluted 10 times ) and without the monkey blood serum , on ifn - γ secreting expression stimulated by different concentrations of the rlz - 8 , in a cell proliferation curve of the culture medium with the monkey blood serum , a maximum expression value ( emax ) of value a decreased to 0 . 78 ± 0 . 09 ; a half maximal inhibitory concentration ic 50 increased ; and a slope of the curve decreased to 0 . 77 ± 0 . 20 . therefore , the inhibition effect of the monkey blood serum was not the property of the competitive neutralizing antibody . conclusion : the rlz - 8 does not generate the neutralizing antibody in the monkeys and is not neutralized by the antibody during the whole melanoma treatment process . 98 sd rats ( 49 male and 49 female ), weighed 100 - 120 g , were purchased from laboratory animal center of norman bethune university of medical science , and reared at an spf condition in northeast normal university , at a temperature controlled at ( 20 ± 2 )° c . and a humidity of 48 %, and in 12 hours alternating lighting . the administration dosages for the rats were calculated based on the administration dosage for the mice ; the rats were divided into a contrast group ( physiological saline ), a low dosage group ( 15 μl / kg weight ), a medium dosage group ( 30 μl / kg weight ) and a high dosage group ( 60 μl / kg weight ). the administration manner was an intraperitoneal injection . feeding amount , weight ; serology : liver function and kidney function ; immunity : thymus index and spleen index ; serum complements igm , igg , c3 and c4 ; pathology examination : heart , liver , spleen , lung , kidney , pancreas , thymus , gonad etc . as showed in table 5 , the rlz - 8 protein medium dosage group and the rlz - 8 protein high dosage group evidently increased the weights of the male rats ; the rlz - 8 protein low dosage group evidently increased the weights o the female rats . the rlz - 8 protein had no adverse impact on a general growth state of the sd rats , such as the feeding . moreover , the rlz - 8 protein medium dosage group and the rlz - 8 protein high dosage group significantly increased the weights of the male rats ; the rlz - 8 protein low dosage group significantly increased the weights of the female rats . as showed in table 6 , the rlz - 8 protein had no obvious adverse impact on the liver function and the kidney function of the rats . the rlz - 8 low dosage group significantly increased a content of alb ; the rlz - 8 high dosage group had lower content of ast than the rlz - 8 medium dosage group ; the rlz - 8 protein groups had lower content of bun than the contrast group , wherein the rlz - 8 medium dosage group and the rlz - 8 high dosage group had the significantly low content of bun . the cbe levels of the rlz - 8 low dosage group and the rlz - 8 medium dosage group significantly increased ; the cre level of each rlz - 8 protein group significantly increased . in the rlz - 8 medium dosage group , the tba level and the ua level significantly increased ; in the rlz - 8 low dosage group , the tp level significantly increased . for the female rats , the alb content and the ast content of the rlz - 8 high dosage group significantly decreased ; the tp content of the rlz - 8 high dosage group decreased ; and the ua content of each rlz - 8 group significantly increased . referring to table 7 , immunity examination results showed that the spleen index ( except the low dosage group ) and the thymus index of each rlz - 8 group increased compared with the contrast group , but not significantly . with regard to igg and igm , each dosage group slightly increased compared to the contrast group , without significance . with regard to c3 and c4 , no significant difference existed between each dosage group and the contrast group , and thus , the rlz - 8 had no impact on c3 and c4 of the rats . pathology examination : by comparing tested organs with the organs of the to contrast group , no obvious morphological change was observed . the rlz - 8 protein facilitates the growth of the rats ; the rlz - 8 protein has no adverse impact on the liver function and the kidney function of the rats . the ua is beneficial and harmful to the body , wherein the former one refers to an anti - oxidation property and the latter one refers to stimulation to blood vessel smooth muscle cell proliferation and an injury to functions of endothelial cells . in the example 4 , the significant increase of ua may play an important role in anti - oxidant capacity ; the rlz - 8 protein significantly enhances the immunity of the rats , especially humoral immunity ; and , the rlz - 8 protein has no significant adverse impact on major organs of the rats . 1 . the above pharmacology tests indicate that the anti - tumor effect of the rlz - 8 is significant in maintaining the leukocyte level of the body without toxicity . therefore , the rlz - 8 is suitable and safe as a drug . 2 . as an anti - tumor drug , the rlz - 8 can be administrated orally and parenterally . the administration dosage depends on the symptom , the age , the weight etc . for adults , the oral administration is executed as 10 - 1000 mg per dosage / per person , several times per day ; the parenteral administration is executed as 10 - 100 mg , several times per day . 3 . a drug for the oral administration of the present invention can be tablets , pills and capsules ( hard capsules and soft capsules ). the drug for the oral administration comprises the rlz - 8 and at least one inert diluent , such as lactose , mannitol , glucose , starch and polyvinyl pyrrolidone ; and further comprises a pharmaceutically acceptable additive , except the inert diluent , such as lubricant , disintegrant and stabilizer . if necessary , the tablets or the pills can be coated with at least one layer of film made of gastric - soluble material or enteric - soluble material . an injection for the parenteral administration of the present invention comprises the rlz - 8 and at least one inert liquid diluent , such as distilled water for injection and physiological saline . the rlz - 8 can be made into lyophilized powder and dissolve into the inert liquid diluent to be injected . 1000 mg of rlz - 8 were dissolved into 100 ml of sterilized physiological saline , uniformly mixed , separated into each injection with a concentration of rlz - 8 10 mg / ml / per injection to be stored into each bottle , sealed , and sterilized into products . other items accorded to requirements of the injection under pharmacopoeia of the people &# 39 ; s republic of china , 2010 edition . 100 g of rlz - 8 and 0 . 5 kg of pharmaceutical starch were prepared into capsules according to known capsule preparation techniques and devices , rlz - 8 10 mg / per capsule . other items accorded to requirements of the capsule under pharmacopoeia of the people &# 39 ; s republic of china , 2010 edition . 100 g of rlz - 8 , 560 g of microcrystalline cellulose , 380 g of anhydrous lactose , and 200 g of magnesium stearate were prepared into tablets according to known tablet preparation techniques and devices , rlz - 8 10 mg / per tablet . other items accorded to requirements of the capsule under pharmacopoeia of the people &# 39 ; s republic of china , 2010 edition . a certain amount of the rlz - 8 , according to requirements of oral fluid under pharmacopoeia of the people &# 39 ; s republic of china , 2010 edition , was prepared into the oral fluid through known oral fluid preparation techniques and devices . one skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting . it will thus be seen that the objects of the present invention have been fully and effectively accomplished . its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles . therefore , this invention includes all modifications encompassed within the spirit and scope of the following claims .
a use of recombinant ganoderma immunoregulatory protein in a preparation of a drug for treating melanoma is disclosed . by establishing experimental animal models of orthotopic tumors and metastatic tumors , an anti - tumor effect of the rlz - 8 is researched , which indicates that the rlz - 8 significantly inhibits a growth of the orthotopic tumors of the melanoma and a formation of metastases of the melanoma .