Keywords
benign prostatic hyperplasia -
Xylopia aethiopica
- oxidative stress - hepato-renal damage - minerals
Introduction
Benign prostatic hyperplasia (BPH) is a common condition that affects older men, involving
the noncancerous enlargement of the prostate gland. It is believed to be caused by
hormonal changes, such as an increase in dihydrotestosterone levels, as well as genetics
and lifestyle. It can cause bothersome urinary symptoms.[1] Oxidative stress has been suggested to play a role in the development and progression
of BPH, and it may also contribute to hepatorenal implications associated with the
condition. The liver and kidneys are important organs for detoxification and elimination
of reactive oxygen species and their by-products.[2] However, excessive oxidative stress can overwhelm their antioxidant defense mechanisms,
leading to hepatic and renal damage.[2] Studies have shown that patients with BPH have increased levels of liver enzymes,
such as alanine aminotransferase and aspartate aminotransferase, indicating liver
dysfunction. In addition, BPH has been associated with an increased risk of chronic
kidney disease and renal dysfunction, possibly due to oxidative stress and inflammation.[2]
Xylopia aethiopica (XAE) is a plant commonly found in West Africa and is known for its medicinal properties.[3] Tall, slender, aromatic, and evergreen, XAE is of the family Annonaceae, and can reach heights of 15 to 30 m with a diameter
of 60 to 70 cm.[4] The plant naturally grows in Savanna region of Africa.[4] The fruit of XAE, sometimes known as “Guinea pepper” or “Negro pepper,” has a variety of recognized
uses in folk medicine.[4] It has been traditionally used to treat various ailments such as malaria, fever,
and gastrointestinal disorders.[5]
[6] Recent studies have shown that XAE has unique properties that make it useful in the management of metabolic complications.[7] The antioxidant properties of XAE are based on the rich presence of antioxidants, such as flavonoids and phenolic compounds.[7] These antioxidants help to scavenge free radicals and prevent oxidative stress,
which can lead to various diseases, including cancer, diabetes, and cardiovascular
diseases.
XAE has earlier been used in the management of BPH.[3]
XAE has anti-inflammatory properties, which help to reduce inflammation in the body.[7] Chronic inflammation is associated with various diseases including cancer, diabetes,
and cardiovascular disease.
Oxidative stress is linked to the development and progression of BPH, and this research
has identified antioxidative and hepatorenal protective effects of XAE in animal models.
Methodology
Reagents and Chemicals
Chemicals and reagents used were from Sigma-Aldrich, Span Diagnostics, UWI, MONZA,
Plasmatec and Elab Science.
Collection of Xylopia aethiopica
The leaves of XAE were harvested from the wild in the early hours of May 9, 2022 at the onset of wet
season at 8.30 AM at Enugu State, Nigeria's Obukpa, Nsukka, Igboeze South Local Government
Area. Prof. J.C. Okafor verified the harvested XAE leaves, and it was then processed into fine powder before sieving after drying at
room temperature varying between 25 and 29°C. The extract was then filtered and concentrated
using a rotary evaporator for 3 days at 65°C. The yield of the extract was 15% of
the original sample used for extraction. The product was stored in a refrigerator
until use. The time and season of plant leaf collection reported in this study are
vital for accurate interpretation of data, understanding the effects of environmental
factors on biological processes, and ensuring the reproducibility and reliability
of scientific studies in plant biology.
Procurement of Drugs and Chemicals
Renhoks Pharmaceuticals supplied testosterone propionate (Tp) and finasteride of analytical
grade.
Proximate Analysis of Plant Extract
The following proximate analyses were performed using standard procedures.
The Association of Official Agricultural Chemists (AOAC) method was used to determine
crude fat, and crude fat content was obtained using gravimetric measurement of N-hexane
or petroleum ether.[8] Moisture content was determined by the method of Aguinaldo et al.[9] Ash was determined using the method of Harbone.[10] However, crude proteins were determined by the method of Hussain et al.[11] Crude fiber was determined according to the method of Alberts et al.[12] The gravimetric method was used to determine the percent of indigestible carbohydrate
in a sample. However, Clegg's method was used to calculate total carbohydrate, which
involved perchloric acid digestion and colorimetric measurement of soluble sugars
using the Anthronic method of Clegg.[13] The total available glucose was determined as % of glucose.
Determination of Vitamins Content in X. aethiopica
Fat-soluble and water-soluble soluble vitamins were determined using standard procedures
following the methods as listed below:
Vitamin D was estimated by the modified method of AOAC,[8] vitamin A according to the method of Kumura and Itokawa,[14] tocopherol (vitamin E) following the method of Jargar et al,[15] ascorbic acid (vitamin C) and thiamine (vitamin B1) to the method of AOAC,[16] riboflavin (vitamin B2), and phylloquinone (vitamin K) as described in AOAC,[17] vitamin B3 and B6 according to the method of Zhang et al.[18]
Determination of Mineral Content
The mineral content of XAE was determined using the method described by AOAC.[16] The atomic absorption spectrophotometer quantitatively measured the concentration
of elements present in the liquid sample. XAE extract was placed into a crucible and incinerated in a muffle furnace. After boiling,
it was cooled and filtered into a 200 mL volumetric flask. The absorbance values of
the minerals were recorded and the percentage of elements in the extract was calculated.
Experimental Animals
A total of 200 male Wistar albino rats were procured from the animal house at the
Department of Biochemistry, University of Nigeria, Nsukka. The rats that ranged in
weight from 250 to 400 g were 16 weeks old. They were kept in regular laboratory conditions
and had unrestricted access to food and water.
Experimental Design and Animal Treatment
Ibiam et al[3] studied how XAE can modulate Tp)-induced BPH in rats. The study was performed in phases as shown
in [Table 1]. In this phase, the rats were acclimatized for 2 weeks and they were divided into
12 groups with 12 rats in each group. They were weighed weekly during the experiment.
Group A1 served as control and they received only the vehicle, olive oil. Tp, 14 mg
kg−1 body weight, was administered intraperitoneally daily to group A2 for 4 weeks to
induce BPH. For preventive studies Finasteride (F), a potent and specific 5α-reductase
inhibitor, 10 mg kg−1 was administered along with Tp (14 mg kg−1) for 8 weeks to group B1 rats. Groups B2, B3, B4, and B5 were pretreated with ethanolic extract of XAE doses of 100, 200, 300, and 400 mg kg−1 respectively for four weeks. It was followed by Tp(14 mg kg−1) along with (XAE), doses of 100, 200, 300, and 400 mg kg−1 treatments for 8 weeks.
Table 1
Animal grouping and treatment
|
Group
|
Pre-treatment/Inducement
|
Treatment
|
Purpose
|
|
A1
|
|
Olive oil, vehicle only
|
Control
|
|
A2
|
Inducement of BPH (4 weeks)
Tp (14 mg kg−1)
|
|
|
|
B1
|
|
Tp(14 mg kg−1) + F(10 mg kg−1)
|
Treatment with standard drug
|
|
B2
|
Pretreatment with XAE (4 weeks)
(XAE) 100 mg kg−1
|
Tp (14 mg kg−1) + (XAE) 100 mg kg−1(8 weeks)
|
Preventive studies
|
|
B3
|
(XAE) 200 mg kg−1
|
Tp (14 mg kg−1) + (XAE) 200 mg kg−1
|
“
|
|
B4
|
(XAE) 300 mg kg−1
|
Tp (14 mg kg−1) + (XAE) 300 mg kg−1
|
“
|
|
B5
|
(XAE) 400 mg kg−1
|
Tp (14 mg kg−1) + (XAE) 400 mg kg−1
|
“
|
|
Inducement of BPH (4 weeks)
|
Treatment 8 weeks
|
Curative potential
|
|
C1
|
Tp (14 mg kg−1)
|
F(10 mg kg−1)
|
Treatment with standard drug
|
|
C2
|
Tp(14 mg kg−1)
|
(XAE) 500 mg kg−1
|
Curative studies
|
|
C3
|
Tp (14 mg kg−1)
|
(XAE) 600 mg kg−1
|
“
|
|
C4
|
Tp (14 mg kg−1)
|
(XAE) 700 mg kg−1
|
“
|
|
C5
|
Tp (14 mg kg−1)
|
(XAE) 800mg kg−1
|
“
|
Abbreviations: BPH, benign prostatic hyperplasia; F, finasteride; Tp, testosterone
propionate; XAE, Xylopia aethiopica ethanol extract.
In the curative studies, Tp(14 mg kg−1) was administered to group C1 for 4weeks to induce BPH after which F (10 mg kg−1) was given for 8 weeks. BPH was induced in group C2, C3, C4, and C5 with Tp(14 mg kg−1) for 4 weeks after which (XAE) doses of 500, 600, 700, and 800 mg kg−1 treatments for 8 weeks. They were all fed with water and feeds.[3]
Preparation of Tissue Homogenate
Rats were sacrificed and the prostates were washed, blotted, and weighed. Ten percent
of the homogenate was prepared in a 0.05M phosphate buffer and centrifuged. The supernatant
was used to measure oxidative stress indicators.
Oxidative Stress Indicators
The superoxide dismutase activity was determined by the method of McCord and Firdorick.[19] The catalase activity was determined by the method of Beers and Sizer.[20] The reduced glutathione in the tissue was determined by the method of Moron et al.[21] The malondialdehyde of the tissue was determined as earlier reported by Udeozor
et al.[22]
Renal Function Tests
The following renal function tests were performed.
Serum urea was determined using the diacetyl monoxide urea method described by Wybenga.[23] Serum creatinine was determined by the alkaline picrate creatinine method described
by Husdan and Rapoport.[24] The potassium ion was determined using the method of sodium tetraphenyl boron described
by Chessbrough.[25] The concentration of Na+ was determined by the method of Chessbrough.[25] The concentration of chloride ion (Cl−) was determined by the method of Chessbrough.[25] The carbon dioxide content was estimated by a method of Forester et al.[26]
Liver Function Indices
The following liver function parameters were performed. Serum protein was determined
by means of biuret reaction as described by Sánchez et al.[27] Aspartate transaminase (AST) also known as serum glutamate oxaloacetate transaminase
activity was determined by the method of Huang et al.[28] Alanine transaminase (ALT) also called serum glutamate pyruvic transaminase activity
was determined by the method of Huang et al.[28] Alkaline phosphatase (ALP) activity was determined by the method of Talib and Khurana[29]
Determination of Some Metals in Prostate Homogenate
The processes utilized by Alexaris and Lazos[30] to digest the homogenate sample are the most essential elements in this work. The
flask was heated, diluted with deionized water, and analyzed using an atomic absorption
spectrophotometer. The standard curve was then used to read the metal concentrations.
Statistical Analysis
The results were presented as mean ± standard deviation, and the distinctions between
the groups receiving treatment and the control groups were assessed through one-way
analysis of variance, in conjunction with a paired one-sample t-test. All statistical computations were conducted with SPSS 20.0 at p-value less than 0.05
Results
Proximate Composition, Vitamins, and Mineral Content of the Xylopia aethiopica Ethanol Leaf Extract
The results of the proximate composition, vitamins, and mineral content of XAE ethanol leaf extract are shown in [Table 2]. The results show that carbohydrate content recorded highest value (54.90 ± 0.15%),
while fat was found to be lowest (3.01 ± 0.18%). The values of ash (14.02 ± 0.16%),
fiber (12.39 ± 0.04%), and protein (7.09 ± 0.01%) were also recorded. The results
of the vitamins content showed that vitamin A recorded the highest value (4.82 ± 1.16%)
and vitamin B1 was found to be lowest (1 × 10−4 ± 1.10−5%). Vitamins E (2.31 ± 0.05), D (1.24 ± 0 × 33%), K (2 × 10−3 ± 2 × 10−4), B2(1 × 10−3 ± 1 × 10−4%), B3(1.30 ± 0.16%), and vitamin C (0.13 ± 0.06%) were recorded. The mineral contents of
showed that Mg was highest (2.68 ± 0.04%), while Cl was found to be lowest (0.02 ± 0.01%).
The values of Ca (0.87 ± 0.02%), Zn (0.12 ± 0.01%), Se (0.10 ± 0.01%), and Na (0.15 ± 0.01%)
were also shown.
Table 2
Proximate composition, vitamin and mineral content of ethanolic leaf extract of Xylopia aethiopica
|
Proximate
|
Mean ± SD (%)
|
Vitamins
|
Mean ± SD (%)
|
Minerals
|
Mean ± SD (%)
|
|
Moisture
|
8.59 ± 0.04
|
A
|
4.82 ± 1.16
|
Ca
|
0.87 ± 0.02
|
|
Ash
|
14.02 ± 0.06
|
E
|
2.31 ± 0.05
|
Mg
|
2.68 ± 0.04
|
|
Fiber
|
12.39 ± 0.04
|
D
|
1.24 ± 0.33
|
Zn
|
0.12 ± 0.01
|
|
Protein
|
7.09 ± 0.01
|
K
|
2 × 10−3 ± 2 × 10−4
|
Se
|
0.10 ± 0.01
|
|
Fat
|
3.01 ± 0.15
|
B1
|
1 × 10−4 ± 1 × 10−5
|
Na
|
0.15 ± 0.01
|
|
Carbohydrates
|
54.90 ± 0.18
|
B2
|
1 × 10−3 ± 1 × 10−4
|
Cl
|
0.02 ± 0.01
|
|
|
B3
|
1.30 ± 0.16
|
K
|
ND
|
|
|
C
|
0.13 ± 0.06
|
|
|
|
|
B6
|
ND
|
|
|
The results are presented as mean ± standard deviation (SD) of replicate measurements.
ND, not detected.
Effect of Xylopia aethiopica on Prostate Tissue Minerals Levels in Tp-Induced Benign Prostatic Hyperplasia in
Rats
The result of XAE on prostate tissue minerals in Tp-induced BPH in rats are shown in [Tables 3] and [4]. The level of the prostate minerals, Zn, Ca, Mg, and Se decreased significantly
(p < 0.05) in Tp-induced BPH in rats. However, this was increased significantly (p < 0.05) in finasteride and XAE treatment groups. Also the levels of the prostate minerals were higher in the XAE groups than in the finasteride treated group.
Table 3
Effect of XAE on prostate tissue mineral levels in Tp-induced benign prostatic hyperplasia in rats
(preventive studies)
|
Group
|
Zn mg/L
|
Ca mg/L
|
Mg mg/L
|
Se mg/L
|
|
A1
|
6.60 ± 1.00a
|
4.80 ± 1.35a
|
9.50 ± 2.25a
|
5.69 ± 2.20a
|
|
A2
|
4.25 ± 1.50c
|
2.60 ± 0.72c
|
5.15 ± 1.25c
|
2.50 ± 0.40c
|
|
B1
|
5.25 ± 1.15b
|
3.90 ± 1.91b
|
7.18 ± 1.45c
|
3.10 ± 1.50b
|
|
B2
|
5.90 ± 1.20b
|
3.98 ± 1.45b
|
7.85 ± 2.14c
|
3.75 ± 0.75b
|
|
B3
|
6.25 ± 1.45b
|
4.20 ± 0.48b
|
8.10 ± 1.25b
|
4.10 ± 7.10b
|
|
B4
|
6.75 ± 0.35b
|
4.75 ± 1.30b
|
8.70 ± 1.50b
|
4.95 ± 1.20b
|
|
B5
|
7.10 ± 0.55b
|
5.00 ± 1.25a
|
9.25 ± 1.15a
|
5.50 ± 0.50a
|
Abbreviations: F, finasteride; Tp, testosterone propionate; XAE, Xylopia aethiopica
ethanol leaf extracts.
The results are presented as mean ± standard deviation of three replicate measurements.
A1—Olive oil (vehicle only), A2—Tp (14 mg kg−1), B1—Tp (14 mg kg−1) + F (10 mg kg−1), B2—(XAE) 100 mg kg−1 + Tp (14 mg kg−1) + (XAE) 100 mg kg−1, B3—(XAE) 200 mg kg−1 + Tp (14 mg kg−1) + (XAE) 200 mg kg−1, B4—(XAE) 300 mg kg−1 + Tp (14 mg kg−1) + (XAE) 300 mg kg−1, B5—(XAE) 400 mg kg−1 + Tp (14 mg kg−1) + (XAE) 400 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Table 4
Effect of XAE on prostate tissue mineral levels in Tp-induced benign prostatic hyperplasia in rats
(curative studies)
|
Group
|
Zn mg/L
|
Ca mg/L
|
Mg mg/L
|
Se mg/L
|
|
A1
|
6.60 ± 10a
|
4.80 ± 1.35a
|
9.50 ± 2.25a
|
5.69 ± 2.20a
|
|
A2
|
4.25 ± 1.50c
|
2.60 ± 0.72c
|
5.15 ± 1.25c
|
2.50 ± 0.40c
|
|
C1
|
4.95 ± 0.55c
|
2.90 ± 1.20c
|
7.60 ± 1.35c
|
3.45 ± 1.20c
|
|
C2
|
5.20 ± 1.15c
|
3.30 ± 1.22c
|
8.00 ± 1.25c
|
4.00 ± 1.15c
|
|
C3
|
5.95 ± 1.25c
|
3.75 ± 1.50c
|
8.90 ± 76b
|
4.75 ± 1.50
|
|
C4
|
6.20 ± 0.75c
|
4.50 ± 1.30b
|
4.25 ± 0.80b
|
5.10 ± 0.75b
|
|
C5
|
6.90 ± 1.20a
|
5.10 ± 1.25b
|
9.85 ± 1.75a
|
6.10 ± 1.25a
|
Abbreviations: AI, after induction for 4 weeks; F, finasteride; Tp, testosterone propionate;
XAE, Xylopia aethiopica ethanol leaf extract.
The results are presented as mean ± standard deviation of three replicate measurements.
A1—Olive oil (vehicle only), A2—Tp(14 mg kg−1), C1—Tp (14 mg kg−1) AI + F(10 mg kg−1), C2—Tp (14 mg kg−1) AI + (XAE) 500 mg kg−1, C3—Tp (14 mg kg−1) AI + (XAE) 600 mg kg−1, C4—Tp (14 mg kg−1) AI + (XAE) 700 mg kg−1, C5—T p(14 mg kg−1) AI + (XAE) 800 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Effect of Xylopia aethiopica on Antioxidant Activities in Tp-Induced Benign Prostatic Hyperplasia in Rats
The results of XAE on antioxidant activities in Tp-induced BPH in rats are shown in [Tables 5] and [6]. The activities of catalase (CT), glutathione (GSH), superoxide dismutase (SOD),
and malondialdehyde (MDA) decreased significantly (p < 0.05) in Tp-induced BPH group compared with control group. Thus, the trend was
reversed (significantly (p < 0.05) increased) in finasteride and XAE treatment groups. However, the activities increased more significantly (p < 0.05) in XAE treated groups than in finasteride group
Table 5
Effect of XAE on antioxidant activities in Tp-induced benign prostatic hyperplasia in rats (preventive
studies)
|
Group
|
CT
u/mg Protein
|
GSH
µmol/mg protein
|
SOD
u/mg protein
|
MDA
µmol/g protein
|
|
A1
|
149.14 ± 0.11a
|
43.32 ± 0.11a
|
55.94 ± 2.50a
|
8.25 ± 0.45a
|
|
A2
|
110.57 ± 2.76c
|
35.93 ± 1.25c
|
35.94 ± 1.95c
|
7.25 ± 0.17b
|
|
B1
|
145.14 ± 0.65b
|
39.96 ± 0.56b
|
37.81 ± 2.40c
|
6.40 ± 0.31c
|
|
B2
|
147.25 ± 0.30b
|
42.65 ± 0.11a
|
38.37 ± 2.17c
|
5.90 ± 0.39c
|
|
B3
|
148.50 ± 0.11b
|
42.95 ± 0.42a
|
43.45 ± 1.90b
|
7.69 ± 0.42b
|
|
B4
|
149.64 ± 0.80b
|
43.50 ± 0.51a
|
45.70 ± 1.95b
|
6.79 ± 0.27b
|
|
B5
|
153.14 ± 1.14b
|
44.35 ± 0.54a
|
46.50 ± 1.76b
|
6.50 ± 0.30b
|
Abbreviations: CT, catalase; GSH, glutathione; MDA, malondialdehyde; SOD, superoxide
dismutase; Tp, testosterone propionate; XAE, Xylopia aethiopica ethanol leaf extract.
Results are presented as mean ± standard deviation of three replicate measurements.
A1—Olive oil (vehicle only), A2—Tp(14 mg kg−1), B1—Tp (14 mg kg−1) + F(10 mg kg−1), B2—(XAE) 100 mg kg−1 + Tp (14 mg kg−1) + (XAE) 100 mg kg−1,B3—(XAE) 200 mg kg−1 + Tp (14 mg kg−1) + (XAE) 200 mg kg−1, B4—(XAE) 300 mg kg−1 + Tp (14 mg kg−1) + (XAE) 300 mg kg−1, B5—(XAE) 400 mg kg−1 + Tp (14 mg kg−1) + (XAE) 400 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Table 6
Effect of XAE on antioxidant activities in Tp-induced benign prostatic hyperplasia in rats (curative
studies)
|
Group
|
CT
u/mg protein
|
GSH
µmol/mg protein
|
SOD
u/mg protein
|
MDA
µmol/g protein
|
|
A1
|
149.14 ± 0.11a
|
43.32 ± 0.11a
|
55.94 ± 2.50a
|
8.25 ± 0.45a
|
|
A2
|
110.57 ± 2.76c
|
35.93 ± 1.25c
|
35.94 ± 1.75c
|
7.25 ± 0.17b
|
|
C1
|
105.14 ± 2.20c
|
34.60 ± 0.42c
|
48.65 ± 1.81b
|
6.55 ± 0.23c
|
|
C2
|
116.00 ± 0.63c
|
43.10 ± 0.51a
|
50.73 ± 1.80b
|
5.50 ± 0.1b
|
|
C3
|
132.50 ± 2.04c
|
45.34 ± 0.7a
|
52.50 ± 1.84b
|
4.25 ± 0.71c
|
|
C4
|
151.00 ± 0.14b
|
44.66 ± 0.20a
|
53.54 ± 1.17b
|
4.60 ± 0.1c
|
|
C5
|
178.86 ± 2.15a
|
45.67 ± 1.50a
|
55.22 ± 1.15b
|
4.75 ± 0.12c
|
Abbreviations: CT, catalase; GSH, glutathione; SOD, superoxide dismutase; MDA, malondialdehyde;
Tp, testosterone propionate; XAE, Xylopia aethiopica ethanol leaf extract.
Results are presented as mean ± standard deviation of three replicate measurements.
A1—Olive oil (vehicle only), A2—Tp(14 mg kg−1), C1—Tp(14 mg kg−1)AI + F(10 mg kg−1), C2—Tp (14 mg kg−1) AI + (XAE) 500 mg kg−1, C3—Tp(14 mg kg−1) AI + (XAE) 600 mg kg−1, C4—Tp (14 mg kg−1) AI + (XAE) 700 mg kg−1, C5—Tp(14 mg kg−1) AI + (XAE) 800 mg kg−1. Values with different superscripts in the same column are significantly different
(p ≤0.05).
Effect of Xylopia aethiopica on Kidney Biochemical Parameters in Tp-Induced Benign Prostatic Hyperplasia in Rats
The results of XAE on kidney biochemical parameters in Tp-induced BPH in rats are shown in [Tables 7] and [8]. The results showed that the levels of K, Na, Cl, HCO3
−, urea, uric acid, and creatinine were significantly (p < 0.05) higher in the TP only group compared with the control group. However, the
levels were reversed significantly (p < 0.05) lower in the finasteride and XAE treatment groups relative to the Tp only group for both studies. At high doses of
XAE 700,800 mg kg−1, the values were quite lower compared with values obtained in the control group.
Table 7
Effect of XAE on kidney biochemical parameters in Tp-Induced benign prostatic hyperplasia in rats
(preventive studies)
|
Group
|
K
mmol/L
|
Na
mmol/L
|
Cl
mmol/L
|
HCO3
mmol/L
|
Urea
mmol/L
|
Uric acid
Mmol/L
|
Creatinine
mmol/L
|
|
A1
|
3.00 ± 0.02c
|
136.50 ± 0.25c
|
101.40 ± 0.64b
|
22.90 ± 2.35b
|
9.60 ± 1.40b
|
1.28 ± 0.12c
|
89.10 ± 2.35b
|
|
A2
|
4.92 ± 0.04a
|
146.40 ± 1.20a
|
105.95 ± 1.65a
|
27.60 ± 1.50a
|
11.40 ± 1.35a
|
3.90 ± 0.01a
|
111.35 ± 1.25a
|
|
B1
|
3.92 ± 0.15b
|
145.30 ± 1.28a
|
102.60 ± 1.25b
|
24.80 ± 1.15b
|
9.80 ± 1.85b
|
3.60 ± 0.15b
|
97.50 ± 2.20b
|
|
B2
|
3.70 ± 1.15b
|
144.15 ± 1.25b
|
101.52 ± 1.15b
|
23.40 ± 0.95b
|
7.10 ± 1.45c
|
2.90 ± 0.18b
|
77.90 ± 1.50b
|
|
B3
|
3.60 ± 0.13b
|
141.30 ± 0.30b
|
100.10 ± 0.95b
|
22.70 ± 1.75b
|
5.40 ± 1.25c
|
2.20 ± 0.05c
|
50.40 ± 2.20C
|
|
B4
|
3.30 ± 0.15b
|
140.40 ± 1.66b
|
97.25 ± 0.10b
|
21.40 ± 0.85C
|
4.80 ± 1.15c
|
1.90 ± 0.02c
|
42.50 ± 2.25C
|
|
B5
|
3.10 ± 0.75b
|
139.20 ± 0.40b
|
90.00 ± 1.25b
|
19.30 ± 0.85C
|
3.80 ± 0.30c
|
1.50 ± 0.01c
|
33.70 ± 1.25C
|
Abbreviations: AI, after inducement; F, finasteride; Tp, testosterone propionate;
XAE, Xylopia aethiopica ethanol leaf extract.
The results are presented as mean ± standard deviation of three replicate measurements.
A1—Control, A2—Tp (14 mg kg−1), B1—Tp (14 mg kg−1) + F(10 mg kg−1), B2—(XAE) 100 mg kg−1 + Tp (14 mg kg−1) + (XAE) 100 mg kg−1, B3—(XAE) 200 mg kg−1 + Tp (14 mg kg−1) + (XAE) 200 mg kg−1, B4—(XAE) 300 mg kg−1 + Tp (14 mg kg−1) + (XAE) 300 mg kg−1, B5—(XAE) 400 mg kg−1 + Tp (14 mg kg−1) + (XAE) 400 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Table 8
Effect of XAE on kidney biochemical parameters in Tp-induced benign prostatic hyperplasia in rats
(curative studies)
|
Group
|
K
mmol/L
|
Na
mmol/L
|
Cl
mmol/L
|
HCO3
mmol/L
|
Urea
mmol/L
|
Uric acid
mmol/L
|
Creatinine
mmol/L
|
|
A1
|
3.00 ± 0.02c
|
136.50 ± 0.25c
|
101.40 ± 0.64b
|
22.90 ± 1.35
|
9.60 ± 1.40b
|
1.28 ± 0.12c
|
89.10 ± 2.35b
|
|
A2
|
4.92 ± 0.04a
|
146.40 ± 1.20a
|
105.95 ± 1.65a
|
27.60 ± 1.50a
|
11.40 ± 1.35a
|
3.90 ± 0.01a
|
111.35 ± 1.25a
|
|
C1
|
3.60 ± 0.25b
|
144.90 ± 1.25b
|
104.90 ± 1.44b
|
23.90 ± 2.40b
|
9.30 ± 1.50b
|
3.60 ± 0.16b
|
92.60 ± 0.58b
|
|
C2
|
3.40 ± 0.05b
|
138.95 ± 0.95b
|
98.00 ± 2.50b
|
21.10 ± 1.30b
|
5.50 ± 0.73c
|
3.20 ± 0.13b
|
70.50 ± 1.25b
|
|
C3
|
3.10 ± 0.15b
|
136.00 ± 0.48b
|
94.50 ± 1.10b
|
19.30 ± 1.25b
|
4.75 ± 0.15c
|
1.40 ± 0.18c
|
45.50 ± 0.95c
|
|
C4
|
2.95 ± 0.03b
|
133.45 ± 2.25b
|
90.20 ± 2.15b
|
18.85 ± 1.15b
|
3.60 ± 0.16c
|
1.30 ± 0.12c
|
35.60 ± 1.50c
|
|
C5
|
2.80 ± 0.16b
|
130.45 ± 0.95c
|
88.20 ± 2.25b
|
18.00 ± 2.25c
|
2.40 ± 0.40c
|
1.20 ± 0.06c
|
30.45 ± 2.15c
|
Abbreviations: AI, after inducement; F, finasteride; Tp, testosterone propionate;
XAE, Xylopia aethiopica ethanol leaf extract.
The results are presented as mean ± standard deviation of three measurements.
Groups—A1—Control, A2—Tp (14 mg kg-1), C1—Tp (14 mg kg-1) AI + F(10 mg kg-1), C2—Tp
(14 mg kg-1) AI+ (XAE) 500 mg g-1, C3—Tp (14 mg kg-1) AI + (XAE) 600 mg kg-1, C4—Tp (14 mg kg-1) AI + (XAE) 700 mg kg-1, C5—Tp (14 mg kg-1) AI + (XAE) 800 mg kg-1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Effect of X. aethiopica on Liver Function Parameters in Tp-Induced Benign Prostatic Hyperplasia in Rats
The result of XAE on liver function parameters in Tp-induced BPH in rats are shown in [Tables 9] and [10]. The results showed a significant (p < 0.05) decrease in the total protein level in the Tp-induced BPH rats relative to
control group. The trend changed on treatment with finasteride and XAE; it significantly (p < 0.05) increased in finasteride and XAE treatment groups compared with the Tp only group in both studies. The levels of AST,
ALT, and ALP were not significantly (p < 0.05) different in the Tp-induced BPH group, finasteride, and XAE treatment groups compared with control in both studies (preventive and curative)
Table 9
Effect of XAE on liver function parameters in Tp-induced benign prostatic hyperplasia in rats (preventive
studies)
|
Group
|
Total protein
mg/dL
|
AST
u/L
|
ALT
u/L
|
ALP
u/L
|
|
A1
|
7.65 ± 0.55b
|
45.82 ± 1.45b
|
65.45 ± 0.75b
|
93.85 ± 0.75b
|
|
A2
|
3.05 ± 0.50c
|
60.27 ± 1.25a
|
70.10 ± 1.15a
|
94.18 ± 1.15a
|
|
B1
|
6.08 ± 0.75b
|
50.50 ± 1.40b
|
71.75 ± 1.35a
|
92.79 ± 0.75c
|
|
B2
|
7.60 ± 1.00b
|
60.75 ± 1.35a
|
75.45 ± 1.10a
|
92.80 ± 2.25c
|
|
B3
|
8.43 ± 0.65b
|
51.85 ± 2.50b
|
74.75 ± 1.05a
|
92.55 ± 1.25c
|
|
B4
|
9.65 ± 1.10a
|
50.95 ± 1.25b
|
73.65 ± 0.90a
|
92.85 ± 1.25c
|
|
B5
|
10.45 ± 0.75a
|
52.00 ± 2.15b
|
72.00 ± 2.15b
|
92.80 ± 1.75c
|
Abbreviations: AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP,
alkaline phosphatase; Tp, testosterone propionate; XAE, Xylopia aethiopica ethanol leaf extract.
Results are presented as mean ± standard deviation of three measurement.
A1—Control (vehicle only), A2—Tp (14 mg kg−1), B1—Tp (14 mg kg−1) + F(10 mg kg−1), B2—(XAE) 100 mg kg−1 + Tp (14 mg kg−1) + (XAE) 100 mg kg−1, B3—(XAE) 200 mg kg−1 + Tp (14 mg kg−1) + (XAE) 200 mg kg−1, B4—(XAE) 300 mg kg−1 + Tp (14 mg kg−1) + (XAE) 300 mg kg−1, B5—(XAE) 400 mg kg−1 + Tp (14 mg kg−1) + (XAE) 400 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Table 10
Effect of XAE on liver function parameters in Tp-induced benign prostatic hyperplasia in rats (curative
studies)
|
Group
|
Total protein
mg/dL
|
AST
u/L
|
ALT
u/L
|
ALP
u/L
|
|
A1
|
7.65 ± 0.55b
|
45.82 ± 1.45b
|
65.45 ± 0.75b
|
93.85 ± 0.75b
|
|
A2
|
3.05 ± 0.50c
|
60.27 ± 1.25a
|
70.10 ± 1.15a
|
94.18 ± 1.15a
|
|
C1
|
6.65 ± 0.50b
|
51.55 ± 1.65b
|
71.50 ± 2.50a
|
92.25 ± 1.35c
|
|
C2
|
8.35 ± 0.45b
|
50.50 ± 1.35b
|
70.45 ± 1.15a
|
93.15 ± 1.35b
|
|
C3
|
9.45 ± 1.15b
|
49.25 ± 1.50b
|
67.25 ± 0.75a
|
93.95 ± 1.65b
|
|
C4
|
11.00 ± 1.50a
|
48.45 ± 2.00b
|
65.15 ± 1.15b
|
93.30 ± 2.30b
|
|
C5
|
11.65 ± 0.25a
|
46.30 ± 1.30b
|
63.50 ± 1.08b
|
93.25 ± 1.35b
|
Abbreviations: AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP,
alkaline phosphatase; Tp, testosterone propionate; XAE, Xylopia aethiopica ethanol leaf extract.
Results are presented as mean ± standard deviation of three readings.
A1—Control, A2—Tp (14 mg kg−1), C1—Tp (14 mg kg−1) AI + F (10 mg kg−1), C2—Tp(14 mg kg−1) AI+ (XAE) 500 mg kg−1, C3—Tp (14 mg kg−1) AI + (XAE) 600 mg kg−1, C4—Tp (14 mg kg−1) AI + (XAE) 700 mg kg−1, C5—Tp (14 mg kg−1) AI + (XAE) 800 mg kg−1.
Values with different superscripts in the same column are significantly different
(p ≤0.05).
Discussion
The results of the proximate composition of XAE showed the following order of occurrence; carbohydrates, ash, fiber, moisture, protein,
and fat. The result is consistent with the report researchers in Europe, Japan, India,
and Nigeria who found that polysaccharide in XAE reduced tumor and cancers.[31] This finding is in line with earlier report that dietary fiber through the consumption
of fruits and vegetables has been shown to be preventive and associated with decreased
incidence of BPH.
XAE ethanol leaf extract contains minerals such as Mg, Ca, Na, Zn, Se, and Cl that can
be administered to Tp-induced BPH in albino rats to reduce the levels of BPH. Mg levels
were found to be significantly lowered in patients with BPH, while Ca levels in BPH
patients have not been associated with the condition.[32]
XAE ethanol leaf extract contains vitamins A, E, B3, D, C, K, B2, and B that are anti-BPH
and protect against growth and viability of BPH cells. National Health and Nutritional
Examination survey showed that vitamin D deficiency is associated with lower urinary
track symptoms, while intake of vitamin D supplement and vitamin D analog has been
shown to decrease BPH prevalence and prostate size.[33] It has been widely reported that some antioxidants such as vitamin A, E, and C found
also in XAE play key roles in the prevention of BPH by ameliorating oxidative stress, which otherwise
results in DNA damage and increases the risk of mutation and malignant transformation.[34]
BPH decreased minerals in prostate homogenates compared with the normal control group,
while these were significantly increased in finasteride and XAE treatment groups. XAE treatments can enhance the levels of prostatic fluid minerals to promote prostate
health. Zinc is an important constituent of prostatic fluid and is known to play an
important role in the development and functioning of prostate.[35] It is suggested that the ameliorative effects of selenium against the histological
and histochemical changes of the prostate induced by carbimazole may be due to its
antioxidant properties from a previous study[36] this could have been responsible for the observed therapeutic potentials of XAE in this study due to the significant presence of Se. Ca is an important nutrient
for prostate health, with a positive correlation between it and Mg and Zn in hyperplasia
of the prostate gland. Age-related changes in Ca levels are linked to BPH.[32] Calcium (Ca) is an essential mineral that plays a crucial role in various bodily
functions, including bone health, muscle contraction, blood clotting, and nerve transmission.
While calcium is important for overall health, its relevance specifically to prostate
health is not as direct as it is for other areas of the body. Prostate health is more
closely associated with other nutrients and factors
The results of XAE on kidney parameters in Tp-induced BPH in rats showed that the levels of K, Na, Cl,
HCO3
−, urea, uric acid, and creatinine were significantly higher in the TP only group compared
with the control group. However, the levels were lowered significantly in the finasteride
and XAE treatment groups relative to the Tp only group for both studies. Basically, potassium,
sodium, chloride, and bicarbonate are electrolytes that play crucial roles in maintaining
the balance of fluids and ions in the body. Abnormal levels of these electrolytes
can indicate disruptions in kidney function, fluid balance, or other physiological
processes. If these levels are consistently elevated in individuals with BPH, it might
suggest an underlying kidney or metabolic issue. However, electrolyte imbalances are
not typically directly associated with BPH itself. More so, urea, uric acid, and creatinine
are waste products that are eliminated by the kidneys. Elevated levels of these substances
can indicate impaired kidney function. If individuals with BPH have consistently higher
levels of urea, uric acid, and creatinine, it could suggest that BPH is impacting
kidney function. However, it is important to note that these markers are not specific
to BPH and can be influenced by various factors, including diet, hydration, and other
medical conditions.
BPH-induction significantly decreased antioxidant activities and increased lipid peroxidation,
consistent with previous reports.[37] In this study, the activities were, however, found to be significantly (p < 0.05) increased in finasteride and XAE treatment groups in both studies. Thus, the initial decline in the activities of
CT, SOD, GSH and the increased concentration of MDA in Tp-induced BPH rats were substantially
restored by XAE treatments well above the control values. This indicates protection of prostate glands
against free radicals damage thereby suppressing the development of BPH. This finding
can be attributed to the antioxidant properties of XAE based on its phytochemical constituent.
XAE studies showed that Tp-induced BPH had higher levels of potassium, sodium, chloride,
bicarbonate, urea, uric acid, and creatinine than control groups. Finasteride and
XAE treatment groups had lower levels. Without relief, BPH can lead to asphyxiation,
hydroureters, hydronephrosis, obstructive nephropathy, renal insufficiency, and kidney
failure.[38]
XAE and finasteride treatment in both studies exhibited a significant improvement in
these major pathological problems observed in Tp-induced BPH rats. Reduction in the
levels of serum urea, uric acid, electrolytes, and creatinine by XAE and finasteride treatments in both studies may be due to decreased prostate size,
return of urinary flow rate to control values, and recovery of kidney from BPH damage.
The findings of this study are in agreement with previous reports that urine output
decreased drastically in testosterone treatment group due to enlargement of prostate
gland.[39]
The total protein level in rats with Tp-induced BPH was found to have decreased compared
with a control group. However, finasteride and XAE treatment groups showed a significant increase in protein levels. Most plant extracts
possess antioxidant, hepatoprotective, and nephroprotective functions. Oxidative stress
can lead to tissue damage, including damage to organs involved in protein metabolism.
Certain plant extracts are rich in antioxidants that can help reduce oxidative stress,
potentially leading to normalized serum protein levels as observed in XAE treatments in this study. The liver plays a crucial role in protein synthesis and
metabolism. Some plant extracts are known to have hepatoprotective effects, supporting
liver health and function. Improved liver function could positively affect serum protein
levels. While kidneys are also involved in maintaining proper protein levels in the
blood, some plant compounds possess diuretic and nephroprotective properties, which
might impact kidney function and subsequently influence serum protein levels. These
could be attributed to the observations with XAE and finasteride in this study. Carbimazole and selenium treatment restored to normal
the total protein levels of the prostate epithelial cells in previous studies.[36]
XAE treatments in this study restored the depleted protein content level caused by Tp-induced
BPH, and did not affect the activities of AST, ALT, and ALP in the Tp-induced BPH
group, finasteride and XAE treatment groups. Thus, XAE aside from inhibiting BPH development was well tolerated by the rats in both studies.
