https://doi.org/10.52973/rcfcv-e33274
Received: 01/06/2023 Accepted: 04/08/2023 Published: 22/08/2023
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Revista Científica, FCV-LUZ / Vol. XXXIII, rcfcv-e33274
ABSTRACT
The aim of this study was to determine the effects of alone and
combined treatment of Tarantula cubensis alcoholic extract (TCAE)
and Methenolone Enanthate (ME) on morphometric parameters of
humerus and femur in young rats. In this study, 36 ve–week–old
Wistar Albino rats were used. The animals were divided into 4 groups;
Control group (n:6, normal saline solution, 0.2 mL·rat
-1
, subcutaneously
–SC–), TCAE group (Tarantula cubensis alcoholic extract, 0.2 mL·rat
-1
,
SC), ME group (Methenolone Enanthate), 10 mg·kg
-1
, intramuscularly
–IM–) and TCAE + ME group (Tarantula cubensis alcoholic extract,
0.2mL·rat
-1
, SC + Methenolone Enanthate, 10 mg·kg
-1
, IM). Drug
treatments were done once a week for 7 weeks. At the end of the
experiment, all the animals were euthanized and their humerus and
femur bones were resected and their morphometric parameters were
determined. No statistical differences were determined (P>0.05)
between the groups in terms of the anatomical reference points
(length, corpus thickness, cavum medullare diameter, and cortex
thickness) of humerus and femur bones. In conclusion, it was found
that alone and combined treatments of Tarantula cubensis alcoholic
extract and ME (at normal dose) had no effects on morphometric
parameters of humerus and femur bones in rats in the growing period.
However, these effects may not be observed at high–dose and long
term treatments in rats.
Key words: Alcoholic extract, femur, humerus, methenolone
enanthate, rat, Tarantula cubensis
RESUMEN
El objetivo de este estudio fue determinar los efectos del tratamiento
solo y combinado de extracto alcohólico de Tarantula cubensis y
enantato de metenolona (EM) sobre parámetros morfométricos de
húmero y fémur en ratas jóvenes. En este estudio, se utilizaron 36 ratas
Wistar Albino de cinco semanas de edad. Los animales se dividieron
en 4 grupos; Grupo control (n:6, solución salina normal, 0,2mL·rata
-1
,
por vía subcutánea –SC–), grupo TCAE (extracto alcohólico de
Tarantula cubensis, 0,2 mL·rata
-1
, por vía SC), grupo ME (enantato de
metenolona, 10 mg·kg
-1
, por vía intramuscular –IM–) y TCAE + grupo ME
(extracto alcohólico de Tarantula cubensis, 0,2 mL·rata
-1
, por vía SC
+ enantato de metenolona, 10 mg·kg
-1
, por vía IM). Los tratamientos
farmacológicos se realizaron una vez por semana durante 7 semanas.
Al nal del experimento, todos los animales fueron sacricados y
sus huesos húmero y fémur fueron resecados y se determinaron
sus parámetros morfométricos. No se determinaron diferencias
estadísticas (P>0,05) entre los grupos en cuanto a los puntos de
referencia anatómicos (longitud, grosor del cuerpo, diámetro del
cavum medular y grosor de la corteza) de los huesos húmero y fémur.
En conclusión, se encontró que los tratamientos solos y combinados
de extracto alcohólico de Tarantula cubensis y EM (a dosis normal)
no tuvieron efectos sobre los parámetros morfométricos de los
huesos del húmero y fémur en ratas en el período de crecimiento.
Sin embargo, es posible que estos efectos no se observen con dosis
altas y tratamientos a largo plazo en ratas.
Palabras clave: Extracto alcohólico, fémur, húmero, enantato de
metenolona, rata, Tarantula cubensis
The efects of alone and combined treatment of Tarantula cubensis alcoholic
extract and Methenolone Enanthate on two long bones of young Rats
Los efectos del tratamiento solo y combinado de extracto alcohólico de Tarántula cubensis y
enantato de metenolona en dos huesos largos de ratas jóvenes
Mustafa Sedat Arslan* , Kamil Besoluk
Selcuk University, Faculty of Veterinary Medicine, Department of Anatomy. Konya, Turkey.
*Corresponding author: msedatarslan@hotmail.com
Tarantula cubensis extract and Methenolone Enanthate: Effect on Bone Growth in Rats / Arslan and Besoluk _____________________
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INTRODUCTION
The alcoholic extract obtained from the spider Tarantula cubensis
has been licensed and offered for sale as a Homeopathic Medicine in
Veterinary Medicine. Tarantula cubensis alcoholic extract (TCAE) is a
product that has been frequently preferred in Veterinary Medicine in
the recent times for many diseases. In the product’s package insert
the target species are dened as horse (Equus caballus), cattle (Bos
taurus), dog (Canis lupus familiaris), cat (Felis catus), pig (Sus scrofa
domesticus), sheep (Ovis aries), and goat (Capra hircus). It has been
stated that TCAE produces demarcation, regeneration, antiphlogistic
and resolutive effects in septic cases, dermatitis, inammatory nail
diseases, phlegmons, ulcers, boils, purulent lesions and cases with
purulent necrosis and pathologically varying proliferative and necrotic
tissues [1]. The studies with TCAE have reported that it may be safe
to make use of during pregnancy [2] and expedites healing in oral
lesions [3] and tendon ruptures [4]. It has also been reported that it
may exert antioxidant activity [5], reduce the formation of aberrant
cryptal foci (ACF) and polyps in experimental colon cancer [6, 7]. In
addition, TCAE has been reported to have an antiproliferative effect
in experimental colon cancer [8]. It has been reported that TCAE
administration in the rst period following birth in cattle can increase
the rate of uterus involution [9] and does not cause signicant side
effects in horses [10].
Preparations containing Anabolic Android Steroids (AAS) are
licensed by the authorized institutions of the Countries and
produced and sold by pharmaceutical companies for the treatment of
hypogonadism in men, delayed puberty, and suppression of lactation,
post–menopausal loss of libido, and aplastic anaemia in women,
as well as treatment of conditions with increased catabolism and
hereditary angioedema with a physicians prescription [11]. In males,
95% of Testosterone is secreted from leydig cells in the testes, its
small amounts is secreted from Sertoli and epididymis cells and
the adrenal gland cortex. In females, it is secreted from the ovaries
and very little from the adrenal gland cortex [12, 13]. These effects
of Testosterone, which acts by binding to androgen receptors (AR)
are observed in the penis, accessory genital glands, genital ducts,
skin, bone, bone marrow, muscle, brain, adipose tissue and liver, in
which the receptors are concentrated [14, 15]. AASs can be abused
by athletes to improve performance in tasks related to endurance by
developing muscle quantity and strength. Signicant side effects
can be seen as a result of the prolonged use of these hormones [16].
Many derivatives of Testosterone, which was discovered in 1935, have
been produced so far [17].
There is an anatomical structure called as epiphysis which
promotes growth and development in the proximal and distal parts
of the long bones of the body. This formation assumes a signicant
role in extending the length of the bone during the growth period
of the organism [18]. One of the most important side effects of
AASs is the premature closure of bone growth plates (epiphyseal
plate) during the growth period. Therefore, prolonged use of these
substances may cause short stature in livestock. Some researchers
have also reported that the use of AAS has a negative effect on the
healing of injuries. Therefore, it is recommended to be used with
caution in clinical treatment [19]. Methenolone Enanthate (ME), a
Testosterone–like synthetic commercial product, is recommended to
be used especially in the therapy of bone marrow failure–associated
anemia, wasting syndromes, osteoporosis, and sarcopenia [20]. The
high–dose administration of ME to rats (Rattus norvegicus) may arrest
the growth of these bones by causing early epiphyseal closure in
femur and humerus bones, and in consequence, it may cause negative
effects on bone development, especially in athletes and sedentary
individuals who use AAS at a young age [21].
In the present study, given the negative effects of AASs on bone
development [19] and the regeneration effect of TCAE [1], it was
hypothesised that the administration of ME to growing male rats
may slow down bone development, while TCAE administration may
prevent this drawback.
The aim of this study was to determine the effects of TCAE, ME,
and the combined use of the two drugs on the humerus and femur
lengths and corpus thickness, cavum medullare diameter and cortex
thickness of these bones in growing male rats.
MATERIALS AND METHODS
The study was conducted on a total of 36 5–week–old male Wistar
Albino rats procured from the Experimental Medicine Application and
Research Centre of Selcuk University. During the study, the animals
were accommodated in a total of eight polysulfone cages (Tecniplast,
1354G Eurostandard Type IV, Italy), with a maximum of ve animals
in each cage, at 24 ± 1
o
C, 60% atmospheric humidity and 12 h of light
and 12 h of darkness. Standard rat feed and water were supplied ad
libitum. Before the study, permission was obtained from the “Local
Ethics Committee for Animal Experiments” (Approval number: 2021/3).
Experimental design and animal studies
Control group (n: 6)
In this group, the feed and water needs of the animals were supplied
ad libitum during the experiment. Normal saline solution (NS) was
administered subcutaneously (SC) once a week for 7 weeks at a dose
of 0.2 mL·rat
-1
.
TCAE group (n:10)
This group was subjected to the same care and feeding conditions
as the animals in group 1. TCAE (Theranekron D6
®
inj, Richter Pharma,
Austria) was administered SC once a week for 7 weeks at a dose of
0.2 mL·rat
-1
.
ME group (n:10)
This group was subjected to the same care and feeding conditions
as the animals in group 1. ME (Rimobolan
®
ampul, Bayer Türk Kimya,
Istanbul, Turkey) was administered intramusculary (IM) once a week
for 7 weeks at the recommended dose of 10 mg·kg
-1
(diluted in ricinus
communis seed oil ).
TCAE + ME group (n:10)
This group was subjected to the same care and feeding conditions
as the animals in group 1. TCAE was administered SC at a dose of
0.2mL·rat
-1
and ME was administered IM at the recommended dose of 10
mg·kg
-1
(diluted in ricinus communis seed oil) once a week for 7 weeks.
The body weights of all animals in the groups were measured and
recorded with a precision balance (Kern PFB 6000, Germany) before the
beginning of the study and once a week during the study. Weekly group
averages were taken and necessary ME dose adjustments were made.
Animals in the groups were anaesthetised with Ketamine (95 mg·kg
-1
,
SC) + Xylazine (5 mg·kg
-1
, SC) and sacriced by cervical dislocation
FIGURE 1. Length (A), Corpus thickness (B), Cavum medullare diameter
{(C1+C2)/2} and Cortex thickness {(D1+D2)/2} reference points of the femur
(Right medial side). A: Distance between the endpoints of the caput ossis
femoris and trochlea ossis femoris, B: Medio–lateral thickness of the corpus of
the femur (lower border level of the trochanter tertius), C1–C2: Medio–lateral
and cranio–caudal mean diameter of the cavum medullare at the level of the
corpus of the femur, D1–D2: Mean thickness of the cortex (cortical bone –
substantia compacta) at the level of the corpus of the femur
FIGURE 2. Length (A), Corpus thickness (B), Cavum medullare diameter
{(C1+C2)/2} and Cortex thickness {(D1+D2)/2} reference points of the humerus
(Right medial side). A: The distance between the endpoints of the caput humeri
and trochlea humeri. B: Medio–lateral thickness of the corpus of the humerus
(lower border level of the tuberositas deltoidea). C1–C2: Medio–lateral and
cranio–caudal mean diameter of the cavum medullare at the level of the corpus
of the humerus. D1–D2: Mean thickness of the cortex (cortical bone – substantia
compacta) at the level of the corpus of the humerus
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1 week after the last administration (at the end of the 8
th
week) by
measuring their nal weights with a precision balance. Following
sacrication, femur and humerus bones were resected from all groups
of animals. Extremity bones were dissected and the obtained bones
were cleaned from soft tissues and dried. The anatomical reference
points {A= Length, B= Corpus Thickness, (C1+C2)/2= Cavum Medullare
Diameter, (D1+D2)/2= Cortex Thickness of the femur and humerus
bones on the right and left sides (FIGS. 1 and 2) were identied and
necessary morphometric values were measured from those points with
a 0.01 mm accuracy digital calliper (Mitutoyo CD–15APX Digital Calliper,
Japan) [22, 23, 24, 25, 26]. The obtained materials were captured with
a digital camera (Nikon D200, China) (FIGS. 1 and 2). “Nomina Anatomica
Veterinaria” was used for anatomical terms [27].
FIGURE 3. Lengths of right and left femurs between groups (mm)
FIGURE 5. Corpus thicknesses of right and left femurs between groups (mm)
FIGURE 6. Corpus thicknesses of right and left humerus between groups (mm)
FIGURE 4. Lengths of right and left humerus between groups (mm)
Tarantula cubensis extract and Methenolone Enanthate: Effect on Bone Growth in Rats / Arslan and Besoluk _____________________
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The data were statistically analysed using SPSS 22.0 software. The
data were compared by ANOVA and Duncan test as post–hoc test.
The results were represented as mean ± SD (SPSS 22.0 for Windows/
SPSS
®
Inc, Chicago, USA). The value of P<0.05 was considered as
statistically signicant.
RESULTS AND DISCUSSION
During the experiment, one animal from the ME group died in the
second week and one animal from the TCAE group died in the third week.
FIGS. 3 and 4 presented the femur and humerus length measures
obtained from the study. No statistical difference was determined
between the bone lengths in the groups (P>0.05).
FIGS. 5 and 6 presented the corpus thicknesses of the femur and
humerus obtained from the study. No statistical difference was
determined between the corpus thicknesses in the groups (P>0.05).
FIGS. 7 and 8 presented the cavum medullare diameters of the
femur and humerus obtained from the study. No statistical difference
was determined between the cavum medullare diameters in the
groups (P>0.05).
FIGS. 9 and 10 presented the cortex thicknesses of the femur and
humerus obtained from the study. No statistical difference was
determined between the cortex thicknesses in the groups (P>0.05).
FIGURE 7. Cavum medullare diameters of right and left femurs between groups (mm)
FIGURE 9. Cortex thicknesses of right and left femur between groups (mm)
FIGURE 10. Cortex thicknesses of the right and left humerus between groups (mm)
FIGURE 8. Cavum medullare diameters of right and left humerus between groups (mm)
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TABLE I shows the weekly body weight gains observed in the
animals throughout the study. In the sixth week of the study, statistical
differences between the groups started to be determined (P<0.05).
At the end of the experiment, the body weight values of the control
group were higher than those of the other 3 groups (P<0.05).
It has been reported that the continuous use of AAS has very
serious side effects except for the medical use of Testosterone for
its known normal physiological effects [28]. In this study, no statistical
difference was determined between femur length (P>0.05, FIG. 3),
corpus thickness (P>0.05, FIG. 5), cavum medullare diameter (P>0.05,
FIG. 7) and cortex thickness (P>0.05, FIG. 9) among control, TCAE, ME,
and TCAE + ME groups at the end of the experiment in 5–week–old
Wistar albino male rats. No information on the effect of TCAE on
bone development was found in the literature review. However, TCAE
application to embryo chicken eggs was reported to have no effect
on development [2]. It has been reported that intraperitoneal (IP)
administration of Methenolone Enanthate to 40–day–old Sprague–
Dawley male and female rats at a dose of 5 mg·kg
-1
, ve days a week
for four weeks caused shortening of femur length in males, and
longer femur in females, as well as a decrease in corpus thickness
in males and an increase in females, and no difference was observed
in cavum medullare diameter in both sexes, and while no difference
was determined in cortex thickness in males, it caused an increase
in females [22].
Tarantula cubensis extract and Methenolone Enanthate: Effect on Bone Growth in Rats / Arslan and Besoluk _____________________
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in females. In another study, it was reported that when 50–day–old
Sprague–Dawley rats were administered Testosterone SC at a dose of
5 mg·kg
-1
ve days a week for 10 weeks, humerus length shortened in
males and increased in females, corpus thickness decreased in both
sexes, cavum medullare diameter showed no difference in both sexes,
cortex thickness had no effect in males but an increase in females
[24]. Ozdemir and Lok [21] reported that when ME was administered
IM to a 28–day–old Wistar male rats at a dose of 10 mg·kg
-1
ve days
a week for ve weeks, the humerus length was shorter than the
control group, and no difference was found in corpus thickness,
cavum medullare diameter and cortex thickness.
The present study indicated no change in the parameters of the
femur and humerus. This may be associated with the use of different
AAS derivatives as well as dose, route of administration, duration of
administration, breed, sex, and age differences. Although the study
revealed no statistical difference between the body weights of the
groups at the beginning of the experiment, a statistical difference was
observed in the sixth week and the control group was heavier than
the other three groups at the end of the experiment (P<0.05, TABLEI).
In a study in which a 10 mg·kg
-1
of Nandrolone was administered IP to
30–day–old Sprague–Dawley rats 5 days a week for 4 weeks, it was
reported that no statistical difference was determined between
the experimental groups in terms of weights at the end of the study
[23]. Ozdemir and Yalcin [29] reported no difference between body
weights of the control group and the Testosterone group at the end
of the experiment when Testosterone at a dose of 5 mg·kg
-1
was
administered SC to 50–day–old Sprague–Dawley rats 5 days a week
for 10 weeks. It was also reported that Testosterone may enhance
lean muscle mass [30]. No study was directly available to prove that
TCAE increases body weight in rats. However, it was reported that it
had no effect on body weight in rats with colon cancer [6]. The loss of
body weight observed in the experimental groups may be associated
with the stress imposed by the application.
CONCLUSION
It can be stated that administration of ME at the recommended
doses in rats in the growth period had no effect on femur and
humerus development and slowed down the body weight gain, TCAE
administration had no effect on femur and humerus development and
slowed down the body weight gain. When the studies conducted with
AAS are examined, it can be stated that no similar results could be
obtained and the differences between the studies may be due to the
derivative of the drug used, dose, route and duration of administration,
experimental animal breed, sex, and age differences.
ACKNOWLEDGEMENTS
This study was supported by SUBAPK (21212022)
Conict of Interest
The authors declare that they have no conict of interest.
Data availability statement
The data that support the ndings of this study are available from
the corresponding author upon reasonable request.
TABLE I
Body weight gain (g) of the rats by weeks (mean ± SD)
Groups Control TCAE ME TCAE+ME
1st Week 126.38 ± 15.63 126.22 ± 11.04 125.89 ± 13.36 126.10 ± 9.05
2nd Week 183.25 ± 17.27 180.22 ± 15.83 179.78 ± 13.32 182.80 ± 13.07
3rd Week 237.00 ± 21.88 229.11 ± 17.95 220.00 ± 14.97 232.60 ± 19.60
4th Week 291.75 ± 25.01 278.89 ± 17.47 271.56 ± 19.54 274.00 ± 27.63
5th Week 338.25 ± 27.20 316.22 ± 16.51 311.78 ± 25.31 312.00 ± 33.49
6th Week 367.25 ± 28.20
a
341.11 ± 16.34
ab
334.22 ± 29.74
b
342.00 ± 37.45
ab
7th Week 401.50 ± 31.58
a
367.33 ± 18.00
ab
349.78 ± 46.97
b
371.40 ± 41.22
ab
8th Week 431.50 ± 33.58
a
394.67 ± 19.65
b
382.50 ± 32,86
b
396.60 ± 48.07
b
a, b
: Different letters in the same row were statistically signicant (P<0.05)
Lok and Yalcin [23] reported that when Nandrolone, another AAS
derivative, was administered to 30–day–old male and female rats at
a dose of 10 mg·kg
-1
, IP, ve days a week for four weeks, femur length
was shortened compared to the control group, and no difference was
identied in femur corpus thickness, cavum medullare diameter and
cortex thickness. Another study reported that when Testosterone
was administered SC to 50–day–old Sprague–Dawley rats at a dose of
5 mg·kg
-1
ve days a week for 10 weeks, it shortened femur length in
males and caused extension in females, thinning in corpus thickness in
males but no effect in females, and no difference in cavum medullare
diameter in males, narrowing in females and no effect on cortex
thickness in both sexes [24]. Ozdemir and Lok [21] stated that when ME
was administered IM to 28–day–old Wistar male rats with and without
exercise at a dose of 10 mg·kg
-1
ve days a week for ve weeks, the
femur length of both groups was shorter than the control group, and no
difference was found in corpus thickness, cavum medullare diameter
and cortex thickness. When the data of the present study and the
literature were examined, it was observed that TCAE application had
no effect on femur development during the growth period and AAS
applications caused no xed and denite effects.
In the present study, no statistical difference was determined
between humerus length (P>0.05, FIG. 4), corpus thickness (P>0.05,
FIG. 6), cavum medullare diameter (P>0.05, FIG. 8) and cortex thickness
(P>0.05, FIG. 10) in the Control, TCAE, ME and TCAE + ME groups at
the end of the study. As stated above, no information on the effect
of TCAE on bone development was found in the literature reviews,
however, its effect was not reported on growth in the embryonal
period in poultry [2]. It has been reported that the IP administration
of ME to 40–day–old male and female Sprague–Dawley rats at a dose
of 5 mg·kg
-1
, ve days a week for four weeks caused shortening of
humerus length in males, an extension of the humerus in females,
a decrease in corpus thickness in males but an increase in females,
no effect on cavum medullare diameter in males but an increase in
females, a decrease in cortex thickness in males but no effect in
females [25].
Lok and Yalcin [26] reported that when Nandrolone, another AAS
derivative, was administered IP to 30–day–old Sprague–Dawley rats
at a dose of 10 mg·kg
-1
ve days a week for four weeks, there was no
change in humerus length in males, but shortening in females, and
no change was observed in corpus thickness, while cavum medullare
diameter had no change in males, but increased in females, and no
difference was observed in cortex thickness in males, but a decrease
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